GF Signet 4150 Manual - User Manual

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Signet 4150 Turbidimeter

3-4150.090

Rev

02/09

*3-4150.090*

Specifi cations

Measurement Range

0 to 100.0 NTU or 0 to 1000.0 NTU

Accuracy

<40 NTU:

±2% of reading or ±0.02 NTU

whichever is greater

>40 NTU:

±5% of reading

Resolution

0.0001 NTU (below 10 NTU)

Response Time

Adjustable

Display

Multi-Line LCD with backlighting

Alarm Relays (2)

120-240 VAC, 2A Form C Relay

Analog Output

Active 4-20 mA/RS485, 600

drive

Wetted Materials

• Tubing:

Vinyl

• Measuring cuvette:

Borosilicate Glass

• Glass washer seal:

Silicone

• Pressure regulator:

Polypropylene

FPM

316 Stainless Steel

Delrin® by Dupont™

• Inlet tube:

316 Stainless Steel

Maximum Inlet Pressure

Recommended 345 kPa (50 PSI)

based on tubing connection

Integral Pressure Regulator Rated 1380 kPa (200 PSI)

Flow Rate

0.1 L/m to 1 L/m

(0.026 GPM to 0.26 GPM)

Operating Temperature

1°C to 50°C (34°F to 122°F)

Sample Temperature Range 1°C-50°C (34°F – 122°F)
Power Supply

100 to 240 VAC, 47 to 63 Hz, 80 VA

Insulation Rating

Double Insulated

Pollution Degree 2

Overvoltage Category II

Altitude

2000 meters (6562 ft.) maximum

Relative Humidity

Maximum 95% RH non-condensing

Enclosure Rating

IP 66 /NEMA 4X

Environmental Conditions

Not recommended for outdoor use

Shipping Weight

2.5 kg (5.5 lb)

Regulatory Compliance And Certifi cations

CE
White Light version

Compliant to U.S. EPA 180.1

Infrared version

Compliant to ISO 7027

ETL Listed

UL 61010-1 and CSA C22.2

No.

61010-1

Chinese

RoHS

For detailed information go to www.gfsignet.com

Description

The Signet 4150 Turbidimeter provides accurate and reliable water quality monitoring for municipal and industrial applications.
The 4150 uses the Nephelometric method to calculate the turbidity of a sample as it

ows through a viewing chamber. Models are

available that use white light technology as required by the U.S. EPA 180.1 standard, or select the models that use infrared technology
as required by ISO 7027.
Periodic calibration is mandatory with most turbidity systems, and the 4150 makes it fast and easy with sealed, reusable primary
calibration standards.
Two dry contact relays serve as high or low alarms, with programmable setpoints and time-based delays to prevent false alarms.
Additional features include a bright backlight for the display, and a convenient holder for the cuvette during calibration.
An ultrasonic automatic cuvette cleaning system is standard for 0-100 NTU/FNU systems and optional for 0-1000 NTU/FNU systems.

Signet Turbidimeter

ENTER

Power Supply &
Wiring Terminals

NTU=FNU=FTU

Signet 4150 Turbidimeter

Unpacking and Inspecting the Instrument and Accessories

The table below indicates the items in the turbidimeter shipment.

Item

Quantity

3-4150- ( __ ) Turbidimeter

3-4150.090 Instruction Manual

3-4150.380 Desiccant Pack

(Do not open until ready to install)

4150-0009 Measurement Cuvette

4150-0005 Tubing Kit:

1 ea. shutoff clamp
1 ea. backpressure valve
2 ea. connecting tubing with

ttings for

ow through assembly

Remove the instrument from the packing carton. Carefully inspect all items to ensure that no visible damage has occurred during
shipment. If the items received do not match the order, please immediately contact the local distributor or the Georg Fischer Signet
Customer Service department.

Dimensions

13.5 in.

7.34 in.

4.0 in.

2.0 in.

8.9 in.

Top View

Front View

Side View

Cuvette

Holder

Measuring

Cell

Safety

This manual contains basic instructions that must be followed
during the commissioning, operation, care and maintenance of
the instrument. The safety protection provided by this equipment
may be impaired if it is commissioned and/or used in a manner
not described in this manual. Consequently, all responsible
personnel must read this manual prior to working with this
instrument.

Disclaimer

Georg Fischer Signet LLC accepts no responsibility for damage
caused by the introduction of vapors,

uids or other materials into

the instrument process stream which is not compatible with the
wetted materials. A list of the wetted materials can be found in the
speci

cations on page 1 of this manual.

Material Safety Data Sheets (MSDS) are available online at
http://www.gfsignet.com/msds.htm.

It is the responsibility of the Distributor, Dealer, or Agent to
provide a current copy of the MSDS to the Consumers of Georg
Fischer Piping Systems products. The information contained
herein is presented in good faith and has been compiled from
sources believed to be reliable. It represents the best information
currently available to us. No warranty express or implied, or
merchantability,

tness or otherwise is made and we assume no

liability resulting from its use. This information is offered for your
consideration and users should make their own investigation
and veri

cation to determine the suitability of the information for

their particular purposes. In no event shall Georg Fischer Piping
Systems, the parent company or its subsidiaries be liable for any
claims, losses, or damages of any third party or for lost pro

or any special, indirect, incidental, consequential or exemplary
damages, howsoever arising, even if Georg Fischer Piping
Systems has been advised of the possibility of such damages.
This information relates to the material designated and may not
be valid for such material used in combination with any other
materials nor in any process.

Signet 4150 Turbidimeter

Installation and Commissioning

Mounting & Site Selection

The 4150 is designed to be wall mounted. All the necessary hardware is included.

• Mount the 4150 within 2-3 meters (6-10 ft) of the sampling point to ensure a

quick response time.

• For ease of service there should be about 20 cm (8 in.) free area above the

instrument for calibration and cuvette maintenance.

•  Choose a location that is easily accessible for operation and service.
•  The display should be positioned at eye level.
•  The overall mounting dimensions of the instrument are shown on page 2.
•  Four pan head screws and four wall anchors are provided to mount the wall

bracket.

Plumbing

• Use 4.75 mm (3/16 in.) ID, 8 mm (5/16 in.) OD

exible tubing for the

water supply connections.

• Opaque tubing (not supplied) should be used if the tubing will be

exposed to sunlight, to prevent algae growth.

• The 4150 requires only 1 psi head pressure to operate.
• The

ow through cuvette is rated for a

ow of 100 mL/m to 1 L/m (0.026-

0.26 GPM).

• The integral pressure regulator is rated for a maximum pressure of 200

PSI.

It is factory adjusted. Do not tamper with the regulator.

•

Inlet water pressure should not exceed 50 PSI to avoid damage to
the tubing connection to the regulator.

• Fluid temperature must not exceed 50°C (122°F).
• The shutoff clamp is used to interrupt the

ow during cuvette

maintenance.

• Route the sensor drain tubing to a suitable drain. Do not reintroduce the

drain sample to the process stream.

Signet Turbidimeter

ENTER

Sensor
Interconnect
Cable

Provide 8 in. clearance
for maintenance.

Water IN

from source

Measuring

Cell

Dessicant access

Water OUT
to Drain

Shutoff
Clamp

Pressure
Regulator

Backpressure
Valve

Drain Vent

DESSICANT COMPARTMENT
OPEN ONLY FOR MAINTENANCE

Adjust the Flow to Eliminate Bubbles

The cuvette must be free of air bubbles to provide accurate measurement. The 4150 provides two tools to make this adjustment.

Open the SHUTOFF CLAMP to allow water to

ow through the cuvette.

1. If the

ow is gravity-fed, remove the screw that is blocking the

DRAIN VENT

. This allows for atmospheric equalization and helps to

eliminate bubbles. The vent may leak for a few seconds, until the

ow is well established.

2. Adjust the

BACKPRESSURE VALVE

to prevent air from coming out of solution, which may be observed as tiny air bubbles in the

cuvette:

• Remove the measuring cuvette from the measuring cell and place it in the cuvette holder so it is visible while making these

adjustments.

• If bubbles are visible inside the cuvette, turn the BACKPRESSURE VALVE until the bubbles disappear.

Backpressure

Valve

Shutoff
Clamp

Backpressure

Valve

Drain vent

To Drain

DESSICANT COMPARTMENT
OPEN ONLY FOR MAINTENANCE

Pressure
Regulator

The Inlet pressure
regulator is factory
set. Do not adjust!

Contact the factory
if inlet pressure
will exceed 50 PSI!
A modifi ed tubing
connection may be
required.

Signet 4150 Turbidimeter

Electrical Connections

All of the electrical connections to the 4150 are made inside the
power supply, located to the right of the display.
The connections are labeled within the terminal box and are self-
descriptive.

Follow all local and government recommendations and methods
for installation of electrical connections to and between the
instrument and other peripheral devices.

An external grounding terminal is provided for use in the most
extreme electrical noise environments. It is not required for most
installations.

This instrument requires AC voltages that can injure or kill.
Wiring should be done by qualifi ed personnel only.

WARNING

Normally Closed

Normally Open

Common

Relay
Coil

4150 Internal Power

V+

V-

External
Power
Supply

Normal Condition

Normally Closed

Normally Open

Common

4150 Internal Power

V+

V-

External
Power
Supply

Alarm Condition
or Power Failure

Relay
Coil

COM

ALARM2 ALARM1

4-20 mA

RS-485

Removable

Terminals

AC Cable

Restraint

L1 L2

115/230 VAC

Ground

90-250 VAC

47-63 Hz

}

Power

• Install a circuit breaker in the AC line before the 4150 power

connection to allow for service.

• The 4150 is not supplied with a power cord.
• The power cable bulkhead will accept cable diameters from

5.8 mm (.230 in.) up to 10 mm (.395 in.).

• All terminals are designed to accept wires in the range of 14-

28 AWG.

• All wires should be stripped to a length of 6 mm (¼ in.).
• A strain relief strap is provided to reduce tension on the AC

power terminals.

RS-485

• The RS-485 half-duplex (2-wire) digital interface operates

with differential levels that are not susceptible to electrical
interferences.

• The last device on each bus may require terminating with a

120-ohm resistor to eliminate signal re

ection on the line.

• Do not run RS-485 cables in the same conduit as power.

Relays

Both Alarm relays are con

gured for fail-safe operation.

The normal condition is with power applied to the 4150 and in a non-alarm condition.

• The relays are rated for 2 A maximum.
• If power is removed from the 4150, the relays will be in an alarm state.

4-20 mA

• The active 4-20 mA output is driven by a 15 VDC power

source and can drive external loads up to 600 ohms.

• Do not run 4-20 mA cables in the same conduit as power.

Attach a wire to the small spade lug and connect the housing to a
local Earth ground if necessary.

Signet 4150 Turbidimeter

The Display

All of the elements on the LCD are identi

ed here:

The Keypad

4 keys are used to set up, calibrate and operate the 4150.

Signet Turbidimeter

Turbidity Measurement

Security Indicator

Offset Indicator

Alarm Indicators

Drying Period

Calibrate Menu

Options Menu

Units display
Error Messages

ENTER

ENTER Key

Press to access menus
Press to save changes

UP, DOWN keys

Scroll through Menu options

RIGHT key

Select item or character to edit

During normal operation, the instrument will have the Units selection displayed on the lower row of the
display and the measured reading on the upper row of the display.

The instrument is equipped with a security access code to protect the instrument settings from
inadvertent modi

cation.

If the CODE feature is enabled in the OPTIONS menu, the KEY icon is displayed.

If OFFSET is displayed, the 4150 output has been adjusted to match an external reference
measurement.

The ALM1 and ALM2 icons are displayed if the 4150 measurement has exceeded a HIGH or LOW
alarm setpoint.

DRY indicates that the 4150 is in a drying period, following the replacement of the cuvette. The internal
fan will circulate air to clear condensation from the cuvette.
NOTE: DRY is not an alarm condition. During a DRY period the ultrasonic cleaning system is disabled,
but the instrument is still operating.

CAL is displayed when the 4150 is being calibrated.
• The alarm relays are held in their NORMAL condition when CAL is displayed.
• The 4150 will return to normal operation if no keys are pressed in the CAL menu for 6 minutes.

OPTIONS is displayed when the 4150 is being con

gured.

• The alarm relays are held in their NORMAL condition when OPTIONS is displayed.
• The 4150 will return to normal operation if no keys are pressed in the OPTIONS menu for 10

minutes.

Display Icons and Functions

Signet 4150 Turbidimeter

Security Access Feature

If CODE is enabled in the OPTIONS menu, the Access code (

▲

▼

) must be entered to gain access to CAL or OPTIONS menus.

• Press and hold the

►

key for 2 seconds to access the CALIBRATE menu.

• Press and hold the

►

key for 5 seconds to access the OPTIONS menu.

Signet Turbidimeter

ENTER

Signet Turbidimeter

ENTER

100 NTU Calibration for

4150-3, 4150-4 Only

1. Press the

▲

key

1. Press the

▲

key

2. Press the

▲

key

2. Press the

▲

key

3. Press the

▲

key

3. Press the

▲

key

4. Press the

▼

key

4. Press the

▼

key

5. Press the

▲

and

▼

keys to select the NTU standard value

needed.

Alarm relay contacts are held at the last valid condition while the
instrument is in the CALIBRATE or in the OPTIONS menu.

While in the CALIBRATE menu, the instrument has a time-out
feature that automatically returns the system to normal operation
if no keys are pressed for 6 minutes.

CALIBRATE

The 4150 is calibrated and tested prior to leaving the factory, and
is ready to use directly out of the box.

The EPA recommends that on-line turbidity systems be calibrated
at least once every three months if they are used for EPA
reporting.

The 4150 is designed to recognize the speci

c NTU values of

certifed calibration standards to make periodic recalibration very
safe, quick and simple. The CALIBRATE menu is dedicated to
this method of calibration.

The OFFSET function found in the OPTIONS menu allows a
single-point alignment with an external measurement device.

OFFSET is not a substitute for calibration, but it may be useful if
standard solutions are not readily available.

5. Press the

▲

and

▼

keys to select the OPTIONS function that

will be modi

ed.

While in the OPTIONS menu, the instrument has a time-out
feature that automatically returns the system to normal operation
if no keys are pressed for 10 minutes.

Access to CALIBRATE Menu

Access to OPTIONS Menu

Output Options:

Select the 4-20 mA output or the RS485
Digital output.

Extended Options:

Display many single-set options like
brightness and decimal location.
(See OPTIONS: EXTENDED, pg 11)

Code option:

Turn the Access Code ON or OFF.

Offset option:

Turn the OFFSET option ON or OFF.

Alarm 1 Option:

Turn on the 1st ALARM RELAY.

Alarm 2 Option:

Turn on the 2nd ALARM RELAY.

ALM RELAY

is now LOCKED

ALM RELAY

is now LOCKED

Signet 4150 Turbidimeter

Calibration Procedure

Access the Calibrate menu by pressing the ENTER key for 2 seconds.

Enter the access security code if necessary. (See pg. 6)

CAL will be illuminated on the display.

The upper display will show the measured NTU value.

The lower display will alternate the value of the

rst NTU standard and

Remove the measuring cuvette and place it in the cuvette holder.

If the Signet 4150 will be used over the entire range, a 3-point calibration is required. Calibration standard kits include three cuvettes
and three different turbidity solutions.

• For 4150-3 (range 0-100 NTU): P/N 3822-4001 (code 159 001 585) calibration kit, turbidity, 100, 10 & 0.02 NTU
• For 4150-1 and -5 (range 0-1000 NTU): P/N 3822-4003 (code 159 001 586) calibration kit, turbidity, 1000, 10 & 0.02 NTU

• A Formazin stock solution kit is also available (P/N 3822-4002). Formazin is very unstable, so it is important to ensure that a

fresh stock suspension of Formazin is used to achieve the accuracy quoted for the instrument. The primary calibration standards
are much more stable than Formazin and have a shelf life of 12 months.

• If the application is limited to measurements below 10 NTU, such as potable water, a 2-point calibration may be performed using

only a 10 NTU and a 0.02 NTU standard.

• New calibration standard cuvettes should be indexed to the speci

c instrument before being used the

rst time. See pg. 14.

IMPORTANT!

Calibration does NOT remove OFFSET values.

ALWAYS turn the OFFSET function OFF (Options menu) before performing a full calibration.

Calibration Standards

Calibration Tips

•  Keep the measurement cell covered as much as possible during the calibration period.
•  Replace the cuvette immediately after the calibration to prevent accelerated saturation of the desiccant.
•  During calibration, the fan is turned off to extend the life of the desiccant.
•  The fan will be turned on during calibration countdowns and after returning to the AUTO mode or after

ve minutes, which ever

comes

rst.

10 NTU

Signet Turbidimeter

ENTER

Signet Turbidimeter

ENTER

CAUTION!

Do not touch the glass surface of the cuvette!
Substances on the surface of the glass
will cause errors in the measurement.

Do not remove the glass cuvette from the cap while
holding the assembly over the measuring cell.

Do not allow any debris to fall into the measuring cell.

Do not leave the measuring cell open longer than
necessary. Extended exposure to the atmosphere may
shorten the effective life of the desiccant.

Signet 4150 Turbidimeter

Calibration Error

If the 4150 displays Error after calibration, the calibration standards were out of calibration range, or the standard did not match the
NTU value being requested by the 4150.

The instrument cannot be used until the error is resolved.

1. Check the standards and recalibrate:

Press and hold the ENTER key for 2 seconds and start the calibration sequence again.

2. Restore the factory calibration:

• Press and hold the

▲

key and the

►

key for about 2 seconds.

Signet Turbidimeter

ENTER

Signet Turbidimeter

ENTER

Signet Turbidimeter

ENTER

Signet Turbidimeter

ENTER

Insert the 10 NTU Standard cuvette.

• Press

the

►

key. The 4150 will begin the calibration process. The upper display will count down the progress.

When the process is complete, the upper display shows the new NTU value, while the lower display alternates the value of the NTU
standard and

Insert the 0.02 NTU Standard cuvette.

• Press

the

►

key. The 4150 will begin the calibration process. The upper display will count down the progress.

When the process is complete, the upper display shows the new NTU value, while the lower display alternates the value of the NTU
standard and

• Press

the

▼

key. The lower display will show the next NTU Standard value and

When calibration is complete, press the

▲

and

▼

keys

together to exit the CAL menu and return to normal operation.

Signet Turbidimeter

ENTER

Signet Turbidimeter

ENTER

Insert the Standard cuvette requested by the 4150.

The

rst NTU standard requested will be either 1000 or 100, depending on the range of the 4150.

If the application will be limited to low Turbidity values (less than 10 NTU), press the

▼

key to go to the 10 NTU calibration.

• Press

the

►

key. The 4150 will begin the calibration process. The upper display will count down the progress.

When the process is complete, the upper display shows the new NTU value, while the lower display alternates the value of the NTU
standard and

• Press

the

▼

key. The lower display will show the next NTU Standard value and

IMPORTANT!

This action will reset all of the

CALIBRATE

and

OPTION

menus back to factory settings.

Signet 4150 Turbidimeter

Instrument Offset

The OFFSET function allows the 4150 to be calibrated to match a process grab sample. This procedure is not recommended in lieu of
regular instrument calibration. This function is only useful at turbidity levels in the immediate vicinity of the grab sample and not in the
full range of the instrument. The OFFSET icon is illuminated whenever an offset is applied.

The maximum offset is ± 1.00 NTU. If the 4150 varies from the sample by more than 1 NTU a full calibration is required.

IMPORTANT!

Offset values will remain in the memory even after a complete calibration.

ALWAYS turn the OFFSET function OFF (Options menu) before performing a full calibration.

1. Insert a cuvette

lled with the sample water and record the turbidity reported by the 4150.

2. Measure the turbidity of the sample using a laboratory turbidimeter.
3. Compare the turbidity reported by the 4150 to that obtained in the laboratory. Subtract the Lab value from the 4150 value.

8. If the OFFSET value is a POSITIVE number, press the

▲

key to scroll to a

positive offset value.

Press the

▲

and

▼

keys simultaneously to exit the OPTIONS menu and return to normal operation.

Example:
Laboratory sample measures 4.20 NTU, while the 4150 reads 4.50 NTU, or 0.3 NTU high. The OFFSET needs to be set to -0.3

4. Press and hold the ENTER key until OPTIONS is illuminated on the display.
5. Push the

▼

key until OFST is displayed on the lower row.

6. If the upper display says ON, go to step 7.

If the upper display says OFF:

• Press

the

►

key and then

▼

to turn the OFFSET function ON.

• Press the ENTER key to save the change.
• Press

the

▼

key to display the OFFSET value in the upper display.

7. Press the

►

key. The upper display will begin blinking.

If the OFFSET value is a NEGATIVE number, press the

▼

key to scroll to a

negative offset value.

9. Press the ENTER key to save the changes.

Scroll UP for positive
Offset.

Scroll DOWN for
negative Offset.

Signet 4150 Turbidimeter

Options menu

OPTIONS: Output (O/P)

1. The lower display should show O/P. If it does not, Push the

▼

key until the lower display shows O/P.

2. Press the

►

key. The upper display will begin blinking.

3. Press the

▲

▼

keys to scroll to the 4-20 mA output or the

RS485 Output.

4.  Press the ENTER key to save the selection.
5.  See instructions for 4-20 mA settings below.
6.  See instructions for configuring the RS-485 port below.

Setting the 4-20 mA Output

1. Press the

▼

key. The lower display shows LOLM (Low Limit).

2. Press the

►

key. The upper display will begin blinking.

3. Press the

▲

and

▼

keys to scroll to the NTU value at 4 mA.

4. Press the ENTER key to save the setting.
5. Press the

▼

key. The lower display shows UPLM (Upper

Limit).

6. Press the

▲

and

▼

keys to scroll to the NTU value at 20 mA.

7. Press the ENTER key to save the setting.

Press the

▲

and

▼

keys simultaneously to exit the OPTIONS

menu and return to normal operation.

Confi guring the RS–485 Port Output

1. Press the

▼

key. The lower display shows BAUD.

2. Press the

►

key. The upper display will begin blinking.

3. Press the

▲

and

▼

keys to scroll to the baud rate required

(1200, 2400, 4800, 9600, or 19200)

4. Press the ENTER key to save the setting.
5. Press the

▼

key. The lower display shows ADDR (Address).

6. Press the

►

key. The upper display will begin blinking.

7. Press the

▲

and

▼

keys to scroll to the correct address.

Address options are from 1 to 255.

Press the ENTER key to save the setting.

8. Press the

▼

key. The lower display shows MBUS.

9. Press the

►

key. The upper display will begin blinking.

10. Press the

▲

and

▼

keys to select ASCII or RTU.

Press the ENTER key to save the setting.

Press the

▲

and

▼

keys simultaneously to exit the OPTIONS

menu and return to normal operation.

The OPTIONS menu contains settings that are generally set once
then rarely changed. The factory setting for all the items in the
OPTIONS menu is OFF. When an option is turned ON, settings
related to that option will appear in the menu.

Signet Turbidimeter

ENTER

Output Options:

Select the 4-20 mA output or
the RS485 Digital output.

Extended Options:

Enable access to performance and
setup options like brightness and
decimal location.
(See OPTIONS: EXTENDED, pg 11)

Code option:

Turn the Access Code ON or OFF.

Offset option:

Turn the OFFSET option ON or OFF.

Alarm 1 Option:

Turn ALARM RELAY 1 ON or OFF.

Alarm 2 Option:

Turn ALARM RELAY 2 ON or OFF.

ENTER

Press and hold the ENTER key until
OPTIONS is illuminated on the display.
Enter the ACCESS CODE if the key is
displayed.

Section 7.2

Section 7.3

Signet 4150 Turbidimeter

OPTIONS: Extended: Response Time

The response time determines how quickly the 4150 responds to changes in the NTU measurement.
1 = approx. 5 seconds, 100 = approx. 500 s.
Select a high value to avoid reading air and other anomolies.
Select a low value to react to rapid changes in the measurement.
Set the response time using the

▲

and

▼

keys. Press the ENTER key to save the new setting.

OPTIONS: Extended: Display Resolution

The 4150 can display up to four decimal places. The factory setting is 0.01. Set the resolution by
pressing the

▲

▼

keys. Press ENTER key to save the selection.

OPTIONS: Extended: LCD Backlight Brightness

The LCD backlight brightness can be adjusted. Ten levels are available. The default brightness is 8.
Set the brightness by pressing the

▲

▼

keys. Press ENTER key to save the selection.

OPTIONS: Extended: Units

All instruments are shipped from the factory set in NTU mode. The 4150 can also display in FNU
(Formazin Nephelometric Units). Use the

▲

and

▼

keys to change to FNU.

Press ENTER key to save the selection.

OPTIONS: Extended

Press the

▼

key. The lower display shows EXTD (Extended menu)

OPTIONS: Extended: RS485 Parameters

These menus will only appear if the RS485 is selected as the OUTPUT option. Factory settings are:

8 Bits

No (nOnE) Parity

1 Stop Bit. Make selections using the

▲

and

▼

keys.

Press the ENTER key to save the selection.

OPTIONS: Extended: Ultrasonic Cleaning (3-4150-3 and 3-4150-5 models only)

The default mode is On. Use the

▲

and

▼

keys to turn OFF.

Press the ENTER key to save the selection.

OPTIONS: Extended: Desiccant Alarm

Turn ON to activate the alarms and send the 4-20 mA to 2 mA when the humidity detector indicates
that the internal environment is close to the point where humidity could cause condensation.
Press the ENTER key to save the selection.

The EXTENDED menu contains many single-set options like brightness and decimal location.
The EXTENDED option will always revert to OFF when you exit the menu.

Signet 4150 Turbidimeter

The 4150 has two relays that can be programmed to serve as High or Low alarms. The relays are factory set to OFF.
When activated, each relay can be programmed with a Setpoint (S/P), a Delay ON time and a Delay OFF time.

Signet Turbidimeter

ENTER

OPTIONS: Alarm Relays

1. Press the

▼

key to scroll to the ALM1 display.

3. Press the

▲

and

▼

keys to select Hi or Lo operating mode for this relay.

Press the ENTER key to save the setting.

4. Press the

▼

key. The lower display shows S/P (Set Point).

The ALM1 or ALM2 icons will be displayed to indicate which relay is being set.

Press

the

►

key. The upper display begins blinking.

Press

the

▲

and

▼

keys to scroll to the NTU value where the Alarm will be activated.

Press the ENTER key to save the setting.

Press

the

▼

key to scroll to the next menu item.

5. Press the

▼

key. The lower display shows DLY

▲

(Delay ON time).

Press

the

►

key. The upper display begins blinking.

Press

the

▲

and

▼

keys to scroll to the time (from 1 second to 100 seconds) before

the Alarm relay will be activated.

Press the ENTER key to save the setting.

Press

the

▼

key to scroll to the next menu item.

6. Press the

▼

key. The lower display shows DLY

▼

(Delay OFF time).

Press

the

►

key. The upper display begins blinking.

Press

the

▲

and

▼

keys to scroll to the time (from 1 second to 30 seconds) before the

Alarm relay will be deactivated.

Press the ENTER key to save the setting.

Press the

▲

and

▼

keys simultaneously to exit the

OPTIONS menu and return to normal operation.

Press the

▼

key again to go to ALM2 display.

Press the

►

key to begin programming ALM2. The upper display

begins blinking. Repeat steps 3 through 6.

2. Press the

►

key to begin programming Alarm #1. The upper

display begins blinking.

Signet 4150 Turbidimeter

Vapor Purge System

If the air inside the 4150 is too humid it will cloud the optical glass cuvette surface and will interfere with the transmission of light. A
continuous vapor purge system in the 4150 keeps the inside of the instrument dry.

•  The air inside the unit is dried by a replaceable desiccant pouch (order number 3-4150.380) located under the measuring cell.
•  System heat is used to warm the air.
•  A fan inside the instrument continuously circulates heated dry air around the measuring cell and the

ow-through cuvette.

• A humidity detector in the 4150 continuously monitors the desiccant condition.

When the internal

environment approaches the point where condensation may occur, the instrument will display
DESC as a warning that the desiccant pouch needs to be replaced.

• The DESC warning does not interrupt the operation of the 4150, but the measurement is not

reliable until the condensation is cleared from the glass cuvette.

• If DESC ALARM is turned on (see OPTIONS: EXTENDED on pg 11), both relays will go into alarm

condition and the 4-20 mA output will be forced to 2 mA.

Desiccant Pouch
3-4150.380

DESSICANT COMPARTMENT
OPEN ONLY FOR MAINTENANCE

Cleaning the Flow Through Cuvette

All glass cuvettes must be clean and free of marks or scratches.
• Clean the interior and exterior with a detergent solution and then rinse several

times with distilled or deionized water.

To replace a cuvette:

• Shut off the

ow using the shutoff clamp.

• Unscrew the old cuvette and replace with a fresh clean one.
• Do not touch the glass surface of the

cuvette. Fingerprints can compromise the
accuracy of the measurement.

Replacing Desiccant

• To install or remove the desiccant pouch, open the round port

on the side of the 4150.

• Open the desiccant bag and place it inside the instrument.
• Close the access door quickly to minimize exposing the

desiccant to the atmosphere.

Operating Tip

• To speed up recovery after a DESC alarm, disconnect the

sensor interconnect cable (Connector on the right side of the
power supply) for 2 seconds and then reconnect it.

Signet Turbidimeter

ENTER

Measuring Cell

Sensor Interconnect cable

CAUTION

Move the cuvette away from
the measuring cell opening to
prevent accidental spills into the
instrument.

Signet 4150 Turbidimeter

Ultrasonic Cleaning

• The 3-4150-3, 3-4150-4 and 3-4150-5 feature a special

ow-through cuvette with an ultrasonic piezo attached to the

base. Spring contacts inside the cuvette housing send a high
frequency signal to the piezo transducer. The vibration helps
prevent scaling and other suspended solids in the process
water from adhering to the inside surface of the optical glass.

• The ultrasonic system is not intended to clean dirty cuvettes,

or to replace manual cleaning entirely, but it will dramatically
increase the time between cleaning.

Flow-through Cuvette with
Ultrasonic Transducer
(4150-0004)

Ultrasonic Contact Springs

Ultrasonic cleaning feature
in 3-4150-3, 3-4150-4 and
3-4150-5 only.

• The 4150 will show CLN on the lower display if a problem is

detected with the cuvette:

• Incorrect cuvette installed.
• No contact between cuvette piezo and springs.

• CLN is an alarm condition. Any active relays will be set to alarm state and the 4-20 mA will be locked to 2 mA.
• After installing a cuvette, there will be a 30 minute period 4150 will show DRY on the lower display. During this time, the

ultrasonic circuit will not operate to allow the Vapor Purge system to remove all moisture from the ultrasonic transducer.

• The Vapor Purge system will NOT remove large droplets of water, only residual moisture. The DRY message is normal and is

not considered an alarm condition; therefore no alarms will be implemented. If the cuvette is removed during this period no CLN
alarm is posted until the 30 minute DRY period times out.

Indexing Calibration Cuvettes

To achieve the greatest accuracy, and account for normal scratches and aberrations in cuvette glass when calibrating, calibration
cuvettes should be indexed using the indexing rings supplied with the Standard Kits.

The following steps allow repeatable indexing of calibration standards:
1. With the instrument in AUTO mode, remove the measuring cuvette and insert the standard cuvette.
2. Slowly rotate the cuvette inside the optical well, one complete revolution (360º).

While rotating the standard slowly, observe the measured turbidity and locate the position of the cuvette having the lowest reading.

3. With the calibration standard positioned at the location having the lowest turbidity reading, install the Indexing Ring over the cap on

the standard so that the pointer of the Indexing Ring faces directly forward.

When using the standards in future, always insert the standard so that the pointer of the indexing ring faces forward. Slowly rotate the
standard back and forth about 5° to

nd the lowest point. The standard is now indexed and ready for use.

The external surface of the ultrasonic cuvette must be completely dry before it is inserted into the sensor. If there is
any visible moisture present on the cuvette or transducer, there is a great risk of damaging the sensor electronics and
the transducer.

Cuvette Indexing Ring

Signet 4150 Turbidimeter

Troubleshooting

Signet 4150 Fault Detection

The Signet 4150 performs continuous diagnostic monitoring. There are three levels of fault detection: warnings, errors and failures.

Warning

A warning is simply a screen indication of a problem. The measurement is not interrupted and no alarms are activated.
• When the desiccant becomes saturated, a screen warning of

DESC

will appear.

Error

An error indicates a failure or a problem that usually can be corrected. These errors include:
• 4-20 mA loop open (

)

• Bad calibration (

CAL

)

• Desiccant alarm activated and replacement required (

DESC

)

• Ultrasonic transducer is not making contact or the

ow through cuvette has been removed (

CLN

)

• Lamp out (

LAMP

)

The source lamps in the Signet 4150 are designed for long life. The IR lamp is rated for 10 years and the white light version is rated
for 7 years.

Replacing the lamp involves signi

cant disassembly and handling delicate components.

We recommend returning the unit to the factory for this service. If

eld replacement is required, contact the factory for assistance.

If any of these conditions occurs, both relays will be set to the alarm state and the 4-20 mA output will be held at 2 mA.

System FAIL Message

A failure is a system fault. This is NOT a problem that the operator can correct, and the unit must be returned to the factory for service.
If a failure occurs, the instrument will not function properly and will display the word

FAIL

on the lower row. Both alarm relays will be

activated and the 4-20 mA output will be held at 2 mA (if 4-20 mA is selected).

Troubleshooting

Symptom

Possible Cause

Solution

Lower display shows MA

4-20 mA loop open

Check Loop wiring

Lower display shows DESC

Desiccant pouch saturated

Change desiccant pouch

Lower display shows LAMP

Lamp failed

Contact factory for assistance

Lower display shows FAIL

Major system fault

Return to factory for service

Readings are higher than expected

Bubbles in solution

Condensate or leaky cuvette

Flow through cuvette dirty

Instrument out of calibration

Ensure that the drain vent is open and is
not obstructed.
Apply backpressure.
Check

ow through cuvette for condensate

or leaks.

Clean cuvette.

Recalibrate

Readings are erratic

(1) Bubbles in solution
(2) Debris in

ow through

(1) See above
(2) Clean debris from cuvette

Readings are lower than expected

Instrument out of calibration

Recalibrate.

Upper display

ashes

Sample Over-Range

Check sample. Sample may be too high to
read.

Signet Part Number

Code

Description

3-4150-1

159 001 596

Turbidimeter, White Light, 0 to 1000 NTU/FNU

3-4150-2

159 001 597

Turbidimeter, Infrared, 0 to 1000 NTU/FNU

3-4150-3

159 001 598

Turbidimeter, White Light, 0 to 100 NTU/FNU With AutoClean

3-4150-4

159 001 599

Turbidimeter, Infrared, 0 to 100 NTU/FNU With AutoClean

3-4150-5

159 001 600

Turbidimeter, White Light, 0 to 1000 NTU/FNU With AutoClean

3-4150-6

159 001 601

Turbidimeter, Infrared, 0 to 1000 NTU/FNU With AutoClean

3822-4001

159 001 585

*Calibration Kit, Turbidity, 100, 10 & 0.02 NTU/FNU

3822-4003

159 001 586

*Calibration Kit, Turbidity, 1000, 10 & 0.02 NTU/FNU

3-4150.380

159 001 588

Replacement Desiccant

3-4150.381

159 001 613

Replacement Desiccant Cap with Gasket

4150-0007

159 001 602

Replacement cuvette set (3 glass cuvettes)

4150-0004

159 001 589

Replacement cuvette with ultrasonic transducer

3822-4002

159 001 591

*Formazin Stock Kit

3822-4000

159 001 592

*Formazin Stock Solution, 4000 NTU/FNU, 500 ml

4150-0001

159 001 593

Pressure Regulator

4150-0003

159 001 587

Stilling/Bubble Chamber

4150-0005

159 001 595

Tubing Kit:
shutoff clamp
backpressure valve
2 lengths connecting tubing with

ttings for

ow through assembly

drain vent

Georg Fischer Signet LLC, 3401 Aerojet Avenue, El Monte, CA 91731-2882 U.S.A. • Tel. (626) 571-2770 • Fax (626) 573-2057
For Worldwide Sales and Service, visit our website: www.gfsignet.com • Or call (in the U.S.): (800) 854-4090

GF Piping Systems

3-4150.090 Rev F 02/09 English

Printed in U.S.A. on recycled paper

* Material Safety Data Sheets (MSDS) are available online at http://www.gfsignet.com/msds.htm.

Ordering Information

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