Full Text Searchable PDF User Manual
TeslaMeter 2000
The Smart Magnetic Sensor
Features:
•
Probes for Axial or Transverse magnetic fields
•
Ranges: 2000, 200, 20mT and Auto
•
Analog and Digital output
•
4½ Digit LCD readout
•
Auto shut-off
•
Temperature compensated sensor
TEL-Atomic, Incorporated
P.O. Box 924
Jackson, MI 49204
1-800-622-2866 - FAX 1-517-783-3213
Introduction
Tel-Atomic's new pocket size TeslaMeter 2000 is unique for the features offered. The Sensor
will measure axial or transverse magnetic fields up to 2000 mT, and can be set for Auto- range.
However, if one of the 3 manual ranges is selected, an analog output of 2.5 volts for FSD of each
range is possible, making it easy to use with a computer interface.
With the 4 ½ Digit LCD readout you can use the sensor as a stand-alone Magnetic field meter.
In addition, the sensor is provided with a USB digital input/output so you can connect it directly
to your computer.
An EEPROM inside the probe has been programmed for temperature compensation of non-
linearity error. Following a patented method, the unit removes temperature effects of magnetic
sensitivity, resistive residual voltage and also all magneto resistive effects. If necessary, the unit
can be re-calibrated easily with the help of the zero-gauss chamber.
The TeslaMeter 2000 comes with complete operating instructions, an axial and transverse probe,
the zero-gauss chamber as well as an external power supply.
Specifications
Measurement Ranges:
±19.999 mT,
1
µ
T resolution
±1999.99 mT,
10 μT resolution
±1999.9 mT,
100μT resolution
Measured value mode:
Constant Magnetic Field [mT]
Alternating Magnetic Field up to 500Hz in RMS [mT]
Magnetic Field Sensor:
Hall Effect GaAs type sensor
Measurement Probes:
Axial and Radial,
12.5mm long,
100cm cable with 9 pin "D” type male connector
DC Range Accuracy:
± 0.05% on each range
AC Range Accuracy:
± 0.2% on each range
Resolution:
.001mT
Range selection:
Manual, Auto
Digital data format:
ASCII data
[±XX,XXmT”CR””LF”], [±XXX,XmT”CR””LF”], [±XXXXmT”CR””LF”]
Analog output:
± 2.5V max. resolution 128 bit per ±2000mT
Measuring utilities:
Zero the hall sensor with the "Zero Gauss Chamber”.
Set offset readout for the current field.
Non-Volatile memory for caching the "last used”
measurement range and mode.
User buttons:
Power:
on / off
Measurement mode:
ac / dc
Measurement range:
2000mT, 200mT, 20mT, AUTO
Zeroing:
readout offset / sensor zero
Power Off:
Manual or Auto after 10 min.
Power On:
Manual
Total Weight:
200g (including batteries)
Dimensions (HxWxD):
130mm x 75mm x 26mm
Display:
4 1/2 digit LCD
Readout frequency:
4 Hz
External power supply:
12V, 100mA, DC 2mm power jack
Supply:
4 x R3 (AAA) type cells
Operating Procedure
1. Slide open the battery door at the back of the unit.
2. Install the 4 1.5V AAA battery and replace the battery door.
3. Plug the sensor into the connector at the top of the unit.
4. Turn on the TeslaMeter 2000 by pressing the POWER switch for at least 1 sec.
The TeslaMeter 2000 is manually operated by 5 switches.
Power
On and Off switch.
Press once for at least 1 sec: instrument turns On.
Press again:
instrument turns Off.
Note: After turning the sensor off, wait at least 5 seconds before turning it on again.
If the “POWER” switch of the TeslaMeter 2000 is not being used or if not connected to USB, the
TeslaMeter 2000 switches off automatically after 10 minutes. The display shows “OFF” for
about 1sec. to indicate that the instrument is switched off. When the battery is too low, the
display indicates “LOBAT” and a few seconds later, the TeslaMeter 2000 switches Off.
When no probe sensor is attached to the connector at the top of the unit, the TeslaMeter 2000
switches Off a few seconds after being switched On.
Range
The values of measurement are displayed in three ranges:
1.
19.999 mT
2.
199.99 mT
3.
1999.9 mT
When the TeslaMeter 2000 is switched On, it is set on the range last used.
By pressing “RANGE” the unit toggles from the last range used to Auto ranging (display shows
blinking dot) to 1999.9 (display shows 0.0) to 199.99 (display show 0.00) to 19.999 (display
shows 0.000).
Note:
If the magnetic field being measured is greater than the chosen range, then the LED will
read FUL.
Zero Cal
This button allows one to calibrate the Hall sensor offset. The user has to place the probe in the
Zero Gauss Chamber, then press the button “ZERO CAL”. The Hall sensor offset is then
measured and memorized. The new set of Offsets remain after switching off the TelsaMeter
2000. The Zero Cal function is not to be used to zero the Hall sensor offset when the sensor is in
a given magnetic field. (See offset)
Offset
This button allows one to zero the readout value when the sensor is in a given magnetic field. The
readout offset is then measured and memorized. The new Offset does not remain in memory
after switching off the TeslaMeter 2000. This function is used to show small variations in large
background fields. When activated, the relative function displays deviation from a specific
setpoint.
AC/DC
This button switches the TeslaMeter 2000 to measure the constant / alternating magnetic field.
Press once :
instrument is in AC measuring mode
Press again:
instrument is in DC measuring mode
The AC measuring mode calculates the alternating part of the measured magnetic field value and
displays the result in True RMS.
In the DC mode either a + or - sign will appear in front of the number. In the AC mode no sign
will appear with the number.
Software Instillation
Place the CD in your computer.
Run Setup.exe and follow the instructions.
Software Operating Instructions
Please note: The software is designed to record data. Analysis of data needs be done in a
spreadsheet.
Connecting the TeslaMeter 2000 to the computer.
Immediately to the left of the “Current Magnetic Induction” screen you will see the
number and the type (axial/transversal) of the probe connected to the TelsaMeter 2000.
Recording Data
To start recording data simply press the
start
button located in the tool bar in the lower screen.
Data is taken at a constant rate of 1 Hz. Up to 2 hours (7200 data points) of data can be taken.
The screen has a “data width” of 60 seconds. The last 60 seconds of data is seen on the screen;
however, by pressing the
left/right
arrow button on the tool bar at the bottom of the screen one
can scroll through all of the data points.
Additionally by pressing the
F1
key the graph will toggle between the selected data screen and a
complete graph of data since recording began. The
F1
key is operative during both the collecting
of data as well as for displaying data after data collection has been stopped.
After pressing
F1
and displaying all of the data you can “zoom” in on a special region of interest.
Press the
SHIFT
key
and with the mouse choose the region of interest you want to examine.
Press the
“R”
key to return to the normal screen.
Press the
s
top
button in the tool bar to terminate data collection.
Please note: Both the x and y axis are auto ranging.
Saving Data
If you choose to save data it will be automatically exported to your spreadsheet in a CSV or in a
TXT with TAB spaces format. You can open this data with the spreadsheet program for further
data analysis.
Recording a Second Run
To record a second set of data simply press
start
. The screen will clear and data recording will
begin again.
Manual Recording
If you want to manually record data click on the
manual
button on the tool bar. With the cursor
on the
manual
button each time the left mouse button is pressed, data will be recorded. You can
also record data by simply pressing the
ENTER
key. The x axis is now “points” instead of time.
To end data recording press
stop
.
Please note: Even though data is taken only when the
manual
button is selected the “Magnetic
Induction Screen” continues to update at the 1Hz rate.
Data is saved in the manual mode as described earlier.
Ranges
When the range button on the TeslaMeter 2000 is pressed the software will reflect this change.
Please note: If the TeslaMeter 2000 is on, for example, the 200 mT range and the magnetic field
exceeds this level “FULL” will appear on the LED screen. However, the software can still
continue to collect data up to about a 50% over range.
