Full Text Searchable PDF User Manual
1
AFA 1000
FUME CUPBOARD MONITORS
Operating and Instruction Manual
Model AFA1000 / 1 – Mk2
•
Digital
display
•
3 Relay inputs
•
3 Relay outputs
•
Com
port
Used for alarm indication and
monitoring on Fume Cupboards
Model AFA1000 / 2 – Mk2
•
Digital
display
•
3 Relay inputs
•
3 Relay outputs
•
3
Pushbuttons
•
Com
port
Used for alarm indication ,
monitoring and control on
Fume Cupboards
Issue: Jan 08
2
Note :-
Access to the Calibration and Configuration menus is password protected and is
factory set. To access and or change the password contact the supplier for the Engineers
Password and enter the Passwords in the Main Menu or alternatively use a Laptop connected
to the Com port and the Upload/Download software provided
Velocity Bar Graph or
Alarm Time Line
Velocity display m/sec or fpm
Control Pushbutton functions
Control Pushbuttons
LED indicators
Function and up/down buttons
for Menu Configuration and
Calibration.
ENTER – also used as
Mute button for audible alarm
OPERATOR DISPLAY PANEL
3
Connection details :-
Relay output 1
Rated 240V
2A AC1
Com port
RS485
Relay input 1
PSU
Flying lead with plug
connection for PCB
15 V DC
Flying lead with plug
connection for PCB
and SM6 airflow sensor
12V DC
Flying lead from Proxy
switch with plug
connection for PCB
12V DC
Sash High
Proximity switch
( Optional )
SM6
Airflow Sensor
R1
R2
R3
SENSOR
SOCKET
0-10V
ECON
OUTPUT
15V DC
POWER
SUPPLY
INPUT
0-10V
AUX.
OUTPUT
s/w
Sash Proximity
switch
OUTPUT RELAYS
COMMS
PORT
RELAY INPUTS
INPUT 1
INPUT 2
INPUT 3
Bn
Bk
Bl
Sash Micro
switch
REFER TO INSTALLATION
INSTRUCTIONS BEFORE CONNECTING
MADE IN ENGLAND
www.tel-uk.com
TEL
WARNING
Relay output 2
Rated 240V
2A AC1
Relay output 3
Rated 240V
2A AC1
Relay input 2
Relay input 3
Plug – in power adapter for
mains socket.
(To suit local requirements )
Standard options :-
230V 50Hz -- UK 3-pin
220V 50Hz -- Euro 2-pin
120V 60Hz -- USA 2-pin
4
1.1 General Description
All systems comprise of the following components :-
1 – SM6 Airflow Sensor,
1 – AFA1000 Alarm unit,
1 – DC power supply
If the Sash Alarm System option is included there will also be a sash micro switch or proximity
switch.
Operator Features
--- the alarm has the following operator features :-
Digital Display
The digital display is a back-lit, full graphic unit with a visual display of approx 56 x 27 mm.
The display operates through the software allowing the generation of figures, wording and
Icons.
The display shows the fume cupboard face velocity in
m/sec
or
fpm
when enabled or the
alternative with no velocity reading but showing
AIR FAIL / AIR SAFE
as continuous display.
All of the above are configurable via the alarm key pad.
An ‘
event time line
’ segmented into 20 x 3 minute segments will scroll across the display
( when enabled) .This takes the form of a graphical ‘ blip’ that will progress from the right hand
side to the left hand side – representing events that have occurred during the past hour.
The alternative to the event time line is a dynamic ‘
bar graph
’ representing the face velocity
The display shows a
Horn
icon ( with line through it ) when the audible alarm is in the Muted
condition
Sash High
– will be displayed when the Sash alarm is enabled and the sash is raised above
the max safe working opening.
This display will alternate on/off with the velocity reading.
Ext Alarm
– will be displayed when the external alarm input is activated ( when enabled )
This display will alternate on/off with the velocity reading
Air Fail -
will be displayed if the airflow is less than the Low air alarm point.
This display will alternate on/off with the velocity reading
High Air -
will be displayed if the airflow is more than the High air alarm point.
This display will alternate on/off with the velocity reading
Set-back
- will be displayed if the night set-back function is activated ( when enabled )
This display will alternate on/off with the velocity reading
Disabled
- will be displayed if the alarm disable function is activated ( when enabled )
This display will alternate on/off with the velocity reading
5
LED Indicators
---- the alarm unit has three LED indicators :-
Red
-- Alarm
Amber
-- Caution
Green
-- Safe
Audible Alarm sounder
-- the alarm has an audible alarm sounder with local or remote
Mute
facility
Enter
--- the alarm has an Enter button -- this is multi-functional as follows :-
Press
Enter
momentarily when alarm is sounding will mute the alarm
Press
Enter
for 5 secs will gain access to
Calibration
and
Configuration
menus ( both menus password protected )
+ / -
--
the alarm has + / - buttons that can be used to scroll through the calibration and
configuration menu or to select options or values
External Connections
-- the alarm unit will have the following connection points :-
Input 1
--- volt free relay input configurable for normally closed or normally open relays
This input can be configured as :-
Alarm disable
Night set-back
External alarm
Sash High
High / Low
Input 2
--- volt free relay input configurable for normally closed or normally open relays
This input can be configured as :-
Alarm disable
Night set-back
External alarm
Sash High
High / Low
Input 3
--- volt free relay input configurable for normally closed or normally open relays
This input can be configured as :-
Alarm disable
Night set-back
External alarm
Sash High
High / Low
6
Output 1
--- volt free relay output configurable as normally closed or normally open relays.
Output 2
--- volt free relay output configurable as normally closed or normally open relays.
Output 3
--- volt free relay output configurable as normally closed or normally open relays.
Com Port
--- RS 485 to enable connection to Laptop or PC for full diagnostics , logging or
setting up and for communications to building computer system ( BMS)
Power supply
--- low voltage DC power supply
Airflow Sensor
--- connection socket for the face velocity airflow sensor.
The following Pushbutton controls apply to the AFA1000 / 2 only :-
Pushbutton 1
-- This button can be configured to act as a
Fan stop / start
button for the
fume cupboard extract fan or as
Night Set-back Override
Pushbutton 2
--This button can be configured to act as a
Lights ON / OFF
or
UV Lights On/OFF
for the fume cupboard or
Pump stop / start
button for a
fume cupboard scrubber pump.
( Can be interlocked with Pushbutton 1 )
Pushbutton 3
-- This button can be configured to act as a
Panic
button or a
Purge button
.
Fan ON / OFF
--
will be displayed if the Fan button is operated ( when enabled ).
Lights ON / OFF
--
will be displayed if the Lights button is operated ( when enabled ).
Pump ON / OFF
--
will be displayed if the Pump button is operated ( when enabled ).
UV Lights ON / OFF
--
will be displayed if the UV Lights button is operated
(
when
enabled
).
Purge ON / OFF
--
will be displayed if the Purge button is operated ( when enabled ).
See
Menu Block Diagram
document for other specific operations and indications.
7
1.2 Alarm Configuration / Calibration
The alarm can be configured via a Laptop or PC using a variety of ‘set up ’ programs each
designed for a particular application with a combination of inputs , outputs and push buttons.
This configuration can be changed via the alarm key pad using the menu system if required or
re-configured by re-connection of the laptop or PC.
This allows the fume cupboard manufacturer to stock standard units and configure the alarms
to suit the application.
The configuration of the various functions and the calibration of the alarm face velocity display
is menu driven. Access to the menu will be via password ( 4 digit number ) and will be two
level. The first level will be for calibration of the unit and the second level will be for
‘engineers’ to set up the configuration of the alarm.
NOTE:- If you enter the Calibration or Configure Menu by accident :-
press the + & - buttons at the same time to escape back to the Main Menu
The menus and sub–menus are in ‘ plain language ’ and incorporate brief instructions where
appropriate.
See
Menu Block Diagram
operation document
1.3 Start up
When unit is powered up the following sequence of events occur :-
1. The 12V DC power is applied to the airflow sensor and a delay on timer is initiated.
2. The alarm then performs a self test on the display and all indicators etc ( approx 5 sec )
3. At the end of the delay period the unit performs one of two options :-
a.
If the alarm calibration has been previously completed – the unit goes to
normal operating mode ( Run )
b.
If the unit has not been calibrated the unit displays
‘ Unit requires Set up -- press Enter to access Set up menu ’
The set up menu allows calibration or configuration via the password protection
During the set-up all alarms and output relays are inhibited.
8
1.4 Events / actions
Safe airflow
•
Meter reading above warning level ( eg > 0.45 m/sec )
•
Green LED on
Warning airflow
•
Meter reads between warning level and air fail level ( eg > 0.40m/sec and < 0.45 m/sec )
•
Amber LED on
Low airflow
•
Meter reads below alarm level for longer than the warning to low air delay time
•
AIR FAIL
toggles on / off with display
•
Red LED on ( Flashing )
•
Audible alarm sounds -- can be muted via Enter pushbutton
•
Low air relay operates ( if configured )
Reset : -- when airflow rises 0.02m/sec above Low air level for longer than the low air to
warning air delay time the Low air alarm resets automatically
High airflow
If configured :-
•
High Air
toggles on / off with display
•
Audible alarm sounds – can be muted via Enter pushbutton)
Audible alarm Mute
•
When the audible alarm is muted via the Enter button - an Icon ( horn with forward slash)
is shown on the display.
Sash High
•
When the input configured as Sash High is activated
•
Amber LED on
•
Sash High
– toggles on / off with velocity display
•
Audible alarm sounds
•
Audible can be muted via Enter pushbutton -- this silences the alarm and initiates a
repeat timer ( if configured ). After the delay time the alarm re-sounds ( and can be re-
muted). During this time the Amber LED flashes on / off.
•
Sash High relay operates ( if configured )
Reset when Sash lowered to safe position and input de-activated.
9
High / Low
•
When input configured as High/Low is activated
•
Display
Icon
shows
High
or
Low
•
High / Low relay operates ( if configured )
This function is designed for two speed fan operation or two position damper operation
switched via a micro switch or proximity switch activated at a given position on the sash.
Night set-back
•
When input configured as Night set-back is activated
•
Night
Set-Back
Icon is displayed
•
Red LED on ( Flashing)
•
Reduced Low air alarm ( if configured )
•
Audible alarm muted
•
Mute Icon shown on display
External alarm
•
When input configured as External alarm is activated
•
Red LED on ( Flashing) – ( if configured )
•
External Alarm
toggles on /off with display -- ( if configured )
•
Audible alarm sounds – can be muted via Enter pushbutton
•
External alarm relay operates ( if configured)
Alarm disable
•
When input configured as Alarm disable is activated
•
Alarm disabled
is displayed
•
Red LED on ( Flashing)
•
Audible alarm muted
•
Mute Icon shown on display
10
AFA1000/2 - only
Pushbutton 1 -- Fan Stop / Start
•
Fan start relay operates
•
Display shows
Fan On/Off
•
Run up timer for 2
nd
relay – Amber LED flashes on / off ( if configured)
•
Run down timer for fan start relay --- Amber LED flashes on / off ( if configured)
•
Interlock with Pushbutton 2 ( if configured)
or
Pushbutton 1 -- Override On / Off
•
Relay operates ( if configured )
•
Red LED flashes on/off
•
Audible alarm muted
•
Meter displays
Override On/Off
•
Disables Night setback operation in
Override
On
condition
Note:- In the
On
condition the unit ignores any Night Set-back input signals and remains in
this condition until
Off
is selected
Pushbutton 2 -- Pump On / Off , Light On / Off , UV Light On / Off ,
•
Relay
operates
•
Pump , Lights , UV Lights Icon shown on display ( if configured )
•
Interlock with Pushbutton 1 ( if configured )
Pushbutton 3 -- Purge On/Off
•
Relay operates -- ( if configured )
•
Red LED on ( Flashing) – ( if configured )
•
Emergency
toggles on /off with display -- ( if configured )
•
Audible alarm sounds -- can be muted via Enter pushbutton
•
Extract output goes to Max if used with Damper or Inverter drives
11
2.1 Quick Start Installation
Follow the instructions below for installing and commissioning the unit. :-
1. Fit the alarm to the Fume Cupboard using the cut-out details provided with the unit
--- see page 13
2. Fit the airflow sensor to the Fume Cupboard using the cut out and installation details
provided --- see page 13 & 14
3. Connect the ‘telephone style’ airflow sensor plug-in cable to the sensor and the back
of the alarm unit --- see typical connection diagram on page 15 & 16
4.
Plug in the power adapter to a Mains AC power socket and connect the flying lead to
the alarm unit --- see typical connection diagram on page 15 & 16
5.
Power up the unit and wait at least 30 secs while the sensor temperature stabilises.
6.
If the unit has not been calibrated the unit will display ‘ Requires setup ’ – press
ENTER to continue and in the Main Menu use the +/- buttons on the alarm facia
select ‘ SETUP ‘ and then press the ENTER button.
7.
In the Setup Menu select ‘CALIBRATION’ and press the ENTER button
8.
At this stage you will be requested to enter the PASSWORD. Use the +/- buttons to
select the individual digits in turn and then press ENTER.
If the password is correct the unit will go to the calibration mode. If the password is
not correct you will be requested to try again --- on the third wrong password entry the
calibration menu will lock out for 10 mins
9.
When in the calibration mode follow the instructions on the display screen to carry out
the calibration of the unit. See ‘Calibration Notes’ below for hints on successful
calibration.
When the calibration is complete the unit will return to the Main Menu.
10.
Use the +/- buttons on the alarm facia select ‘ RUN ’ and then press the ENTER
button.
The unit will now function and display the measured Fume Cupboard face
velocity
12
2.2 Calibration Notes :-
1.
When using a standard Fume Cupboard with Vertical Sliding sashes open the sash
to the normal max safe working height for the Low Air sample.
2.
For the Higher Air sample close the sash to approx 50% of the opening used for the
Lower Air sample. If the Higher air sample value is too close to the Lower Air sample
the alarm will detect this and ask you to repeat with a higher value.( The min
difference between the Low & High air samples is set to 0.3 m/sec )To do this close
the sash a little more and repeat the sample. Avoid closing the sash below 150mm.
3.
The face velocity readings on the open sash may vary at different points on the
measuring grid by up to 0.1m/sec. This is quite acceptable in terms of the fume
cupboard performance so long as no individual point is below the designated Low Air
alarm point .The figure entered for the calibration point can be taken as the average
value of all the measuring grid readings or could be taken as the individual lowest
point on the grid. For most fume cupboards this low point is on the bottom row in the
centre and is a convenient position to measure and for future reference when
checking the alarm during annual maintenance.
4.
Take time when measuring the face velocities for the calibration procedure to allow
for the velocities across the open sash to stabilise. If the velocities are changing or
are turbulent during the sampling period the alarm will detect this and ask you to
repeat the sample.
5.
When using a Fume Cupboard with Horizontal Sliding sashes open the sashes to the
normal max safe working opening for the Low Air sample.
6.
When calibrating or re-calibrating the alarm it is important to ensure that the ‘Vent kit’
is connected to the SM6 sensor on the fume cupboard. If the vent kit is not connected
the sensor will not ‘see’ a change in the airflow during the calibration procedure and
will show “Sensor Difference too low - Check sensor”.
This only applies during the
calibration mode. If in normal running after successful calibration the vent kit
becomes disconnected the air flow across the sensor will fall and the alarm will go
into the AIR FAIL condition.
13
3.0 Dimensions
88mm
148mm
Alarm Panel
Dimensions
74mm
10mm
10mm
17mm
74mm
12mm
12mm
20mm
25mm
25mm
27mm
12mm Dia.
for
SM6 cable
30mm Dia.
Sensor Hole for
Vent Tube
SM6 Sensor
Dimensions
( Rear view )
SM6 Sensor
Panel Cutout
Dimensions
( Front view )
NOT TO SCALE
2 x Holes for self tapping fixing
screw.
( 4mm Fixing Hole provided on
SM6 sensor)
Panel Cutout
Dimensions
118mm x 85mm
118mm
126mm
85mm
4mm
4mm
42.5mm 42.5mm
2 x Fixing Holes
2.5mm dia
for 2 x No. 4
Self tapping screws provided
14
4.0 SM6 Airflow Sensor Installation
It is very important to position the SM6 airflow sensor in the correct position to give long term stable reading of the
face velocity. Please read the INSTALLATION NOTES below and if in doubt contact us for further advice.
INSTALLATION NOTES :-
1. The SM6 sensor must be positioned where it can " see " the room pressure of the laboratory.The back connection
spigot of the sensor is designed to accept a 25mm OD tube which should be connected to the inner chamber of
the fume cupboard. (This tube and fittings is known as the " vent kit " )
The
ideal position
for the end of the 25mm tube for most fume cupboards is 100mm back from the sash glass
and 100mm higher than the normal sash opening height through the inner side wall.
2. If possible mount the sensor on the front of the fume cupboard and use a short length of tube. Tube lengths of
more than 1metre or smaller diameter will restrict the airflow through the sensor. This will lead to too much
sensitivity being required to calibrate the unit which can lead to some instability of the reading or incorrect
readings at low velocitiesl.
3. For fume cupboards with a single skin side wall or a double skin with a small gap between them it may not be
possible to achieve the ideal sensing position using a flexible tube.
With a single skin side wall it is possible to fix the sensor on the outside of the fume cupboard and connect directly
to the inner chamber in the ideal position. This method can only be used for up to two fume cupboards when they
are positioned side by side ( using the two outer walls ).
An alternative method is to mount the sensor on the front of the fume cupboard and connect using a short flexible
tube to a rigid wall tube attached to the inner side wall. The open end of this rigid wall tube should be positioned in
the ‘ideal position’ ie. 100mm back from the sash and 100mm higher than the normal sash opening.
Fume cupboards with a high internal height can present a difficulty because the tube length to reach the ideal
position may be longer than 1 metre. In this case it is better to use a tube no longer than 1 metre which may result
in a sensing position higher than the ideal.
When fitting a sensor to a ’narrow wall’ fume cupboard for the first time it may be necessary to try various
combinations of rigid and flexible tube to find the best combination and position.
4. The sensor should not be mounted in a position were it is subject to draughts from the laboratory air input or
ventilation system.
100mm
100mm
Norm al Sash
working height.
eg. 500mm
SM6 Sensor
Open to the
laboratory
Fume cupboard
outer skin
Fume cupboard
inner skin
25mm Tube
25mm
Female adapter
25mm
Male
bush
SM6 Airflow Sensor
( See exploded view below )
15
5.0 Typical Wiring Diagram
--- (Alarm only)
240V
PSU
Flying lead with plug
connection for PCB
15 V DC
Flying lead with plug
connection for PCB
and SM6 airflow sensor
12V DC
Flying lead from Proxy
switch with plug
connection for PCB
12V DC
Sash High
Proximity switch
( Optional )
SM6
Airflow Sensor
R1
R2
R3
SENSOR
SOCKET
0-10V
ECON
OUTPUT
15V DC
POWER
SUPPLY
INPUT
0-10V
AUX.
OUTPUT
s/w
Sash Proximity
switch
OUTPUT RELAYS
COMMS
PORT
RELAY INPUTS
INPUT 1
INPUT 2
INPUT 3
Bn
Bk
Bl
Sash Micro
switch
REFER TO INSTALLATION
INSTRUCTIONS BEFORE CONNECTING
TEL
WARNING
MADE IN ENGLAND
www.tel-uk.com
Plug – in power adapter for
mains socket.
(To suit local requirements )
Standard options :-
230V 50Hz -- UK 3-pin
220V 50Hz -- Euro 2-pin
120V 60Hz -- USA 2-pin
Com port
RS485
16
5.1 Typical Wiring Diagram with Optional Relay Interface Unit
Optional
Relay Interface Unit
in ABS enclosure mounted on top of Fume Cupboard to
allow up to 3 external cable connections to be terminated.
Rated at 240V 5A
Flying lead with plug
connection for PCB and
Relay Interface Unit
Adaptor PCB connected to Main PCB
terminals and provided with RJ45 socket for
plug in connection to Relay Interface Unit .
Flying lead with plug
connection for PCB
and SM6 airflow sensor
12V DC
Flying lead from Proxy
switch with plug
connection for PCB
12V DC
Sash High
Proximity switch
( Optional )
SM6
Airflow Sensor
R1
R2
R3
SENSOR
SOCKET
0-10V
ECON
OUTPUT
15V DC
POWER
SUPPLY
INPUT
0-10V
AUX.
OUTPUT
s/w
Sash Proximity
switch
OUTPUT RELAYS
COMMS
PORT
RELAY INPUTS
INPUT 1
INPUT 2
INPUT 3
Bn
Bk
Bl
Sash Micro
switch
REFER TO INSTALLATION
INSTRUCTIONS BEFORE CONNECTING
TEL
WARNING
MADE IN ENGLAND
www.tel-uk.com
Plug – in power adapter for
mains socket.
(To suit local requirements )
Standard options :-
230V 50Hz -- UK 3-pin
220V 50Hz -- Euro 2-pin
120V 60Hz -- USA 2-pin
Relay Interface
in enclosure
mounted on top
of Fume Cupboard
Relay output 1
Relay output 2
Relay output 3
Aux Relay
can operated in
parallel with any
relay 1 to 3 via
selector switch.
15V DC
POWER
SUPPLY
INPUT
PSU
Flying lead with plug
connection for PCB
15 V DC
Com port
RS485
17
6.0 LIMITATION OF WARRANTY AND LIABILITY
Seller warrants that this product, under normal use and service as described in the operator’s manual shall be free
from defects in workmanship and material for a period of twelve (12) months, or the length of time specified in the
operator’s manual, from the date of shipment to the customer. This limited warranty is subject to the following
exclusion :-
a.
Batteries and certain other components when indicated in specifications are warranted for a
period of 90 days from the date of shipment to the customer.
b.
With respect to any repair services rendered, Seller warrants that the parts repaired or replaced
will be free from defects in workmanship and material, under normal use, for a period of 90 days
from the date of shipment to the customer
c.
Seller does not provide any warranty on finished goods manufactured by others. Only the
original manufacturer’s warranty applies.
d.
Unless specifically authorised in a separate writing by Seller, Seller makes no warranty with
respect to, and shall have no liability in connection with, any goods which are incorporated into
other products or equipment by the Buyer. All goods returned under warranty shall be at the
Buyer’s risk of loss, Seller’s factory prepaid, and will be returned at Seller’s risk of loss, Buyer’s
factory prepaid.
The foregoing is IN LIEU OF all other warranties and is subject to the conditions and LIMITATIONS stated herein.
NO OTHER EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR PARTICULAR PURPOSE OR
MERCHANTABILITY IS MADE.
THE EXCLUSIVE REMEDY OF THE USER OR PURCHASER, AND THE LIMIT OF LIABILITY OF SELLER FOR
ANY AND ALL LOSSES, INJURIES, OR DAMAGES IN CONNECTION WITH THIS PRODUCT ( INCLUDING
CLAIMS BASED ON CONTRACT NEGLIGENCE, STRICT LIABILITY, OTHER TORT, OR OTHERWISE ) SHALL
BE THE RETURN OF THE PRODUCT TO THE FACTORY OR DESIGNATED LOCATION AND THE REFUND OF
THE PURCHASE PRICE, OR, AT THE OPTION OF THE SELLER, THE REPAIR OR REPLACEMENT OF THE
PRODUCT. IN NO EVENT SHALL SELLER BE LIABLE FOR ANY SPECIAL, INCIDENTAL OR CONSEQUENTIAL
DAMAGES.SELLER SHALL NOT BE RESPONSIBLE FOR INSTALLATION, DISMANTLING, REASSEMBLY OR
REINSTALLATION COSTS OR CHARGES. NO ACTION, REGARDLESS OF FORM, MAY BE BROUGHT AGAINST
THE SELLER MORE THAN ONE YEAR AFTER THE CAUSE OF ACTION HAS ACCRUED.
The purchaser and all users are deemed to have accepted the terms of this LIMITATION OF WARRANTY AND
LIABILITY, which contains the complete and exclusive limited warranty of Seller. This LIMITATION OF WARRANTY
AND LIABILITY may not be amended or modified nor may any of its terms be waived except by a writing signed by
an authorised representative of the Seller.
7.0 Contact us :-
For further information on our range of airflow alarms and controls
please contact us at :-
TEMPERATURE ELECTRONICS Ltd
388 / 400 MANCHESTER ROAD
ROCHDALE
LANCS , ENGLAND
OL11 4NW
Tel
: +44 1706 633438
Fax
: +44 1706 524609
Web site:
www.tel-uk.com