Vaisala DRYCAP DMT345 Betriebsanweisung Seite 138

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Seitenansicht 137
USER'S GUIDE____________________________________________________________________
138 _________________________________________________________________ M210762EN-D
Example:
>a01
Tf : -34.25 'C Ref ? -33
Wait for Purge data...OK
>
4. Press the ADJ button on the motherboard inside the transmitter to
disable adjustments.
NOTE
Several AutoCals can be necessary after this adjustment has been
performed until the transmitter reaches full accuracy.
Adjusting Temperature
NOTE
Temperature adjustment in process conditions is possible only with
DMT345. Temperature adjustment of DMT346 cannot be performed in
process conditions as the DMT346 measures a cooled temperature
whereas the reference instrument measures the actual process
temperature.
Adjusting Temperature Using
Display/Keypad
Use preferably the display/keypad to adjust the temperature.
1. Press the ADJ button on the motherboard to open the
ADJUSTMENT MENU.
2. Press the arrow button to select Adjust T measurement.
3. Select by pressing 1-point or 2-point adjustment. Press START
to start adjusting.
4. Remove the filter from the probe and insert the probe into a
reference temperature.
5. Wait at least 30 minutes for the sensor to stabilize. Follow the
stabilization from the GRAPH display.
6. Press READY when stabilized. Enter the reference temperature by
using the arrow buttons.
When carrying out the two-point adjustment proceed to the next
adjustment point and carry out the procedure as described in the
previous items. Note that the difference between the two
temperature references must be at least 30 ºC.
7. Press OK. Press YES to confirm the adjustment.
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