USER'S GUIDE ____________________________________________________________________
120 _________________________________________________________________ M210543EN-F
b. If your PWD has an external temperature sensor:
Unscrew the TS probe and remove it from the tube as shown in
Figure 27 on page 117.
3. Insert the reference probe in the ice bath. Let it stabilize and
compare the sensor reading with the value that was measured in the
laboratory.
4. When the reference sensor has stabilized, insert the TS sensor in
the ice bath and let both sensors stabilize for a few minutes. Stir the
mixture occasionally. Monitor the readings of both the reference
sensor and the TS sensor (by TCAL) and note when stabilized.
5. Input your reference T value in PWD by entering the TCAL
command with the value (for example, 0,0) as the parameter
>TCAL 0.0
TEMPERATURE SCALES
TS 1 1.0000 TS 0 -0.02 TS -0.0
If TS shows the temperature of the reference, the adjustment has
succeeded. The difference of +/-0.1 °C is acceptable.
6. Dry the TS probe and the reference probe and let the sensors
stabilize for at least five minutes. Repeat steps 5 and 6 described in
Checking TS Sensor Temperature on page 116.
7. Insert the TS sensor back to its original place. Note that right after
the TS sensor is inserted back it may show a slightly higher
temperature than the reference.
If the ice bath is prepared carefully, the ice bath method is accurate
enough and the TS sensor can be adjusted even without a reference
meter. However, if possible, Vaisala recommends that you use a
reference meter.
Vaisala recommends that you use the ice bath method for calibration and
adjusting. However,
if it is not possible, you can calibrate with water
and/or isopropyl alcohol.
Instead of inserting the probe in
ice bath, immerse the reference probe
and the TS sensor in a water container and let them stabilize for a few
minutes. Monitor the readings and
note when they are stabilized.
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