Perform the check as follows:
1. Place the DMT132 in the reference environment (unless it is there already). You can
perform the check even if the DMT132 is currently being powered and used, as long as
there is no cable or LED indicator plug connected to connector II. However, external
powering is not needed when using the MI70 indicator with DMT132.
2. Connect the MI70 connection cable between the MI70 indicator and connector II of the
DMT132.
3. Turn on the MI70 indicator.
4. Check and adjust the environment settings if prompted. You can only change the
pressure compensation value that is used for dew point temperature calculation.
5. If the desired measurement parameters are not shown on the display, select them from
the
Display > Quantities and units
menu.
6. The
Auto power off
function should be disabled on the MI70 indicator to prevent the
indicator from powering off in the middle of the check. While waiting for the active
measurement to start, check the setting in the
Settings > User interface
menu, and
change if necessary.
7. Write down the T
d/f
reading after the measurement has stabilized.
8. Turn off the MI70 indicator and disconnect the DMT132.
9. Insert the reference probe to the measurement environment, and connect it to the MI70
indicator.
10. Turn on the MI70 indicator. Check and adjust the environment settings if prompted.
11. Wait for the reference probe to provide a stable reading, and compare it with the
reading from the DMT132.
The difference between the readings should be within the combined accuracy of the
reference probe and the DMT132 in the measured temperature and dew point. If the
difference is more, the DMT132 is in need of adjustment.
You can send the DMT132 to be adjusted at Vaisala, or adjust the transmitter yourself.
Notes on using the MI70 indicator with the DMT132:
• If you disconnect the DMT132 while the MI70 indicator is on, the measurement
parameters will remain on the screen, but no measurement will be shown.
• Notification messages from the transmitter will appear in English even if the MI70 has
been set to another language.
More Information
‣
Technical Support (page 67)
‣
Humidity Calibration and Adjustment (RHCAL) (page 50)
Chapter 5 – Maintenance
49
Summary of Contents for HUMICAP DMT132
Page 1: ...M211289EN B User Guide Vaisala HUMICAP Dew Point Transmitter DMT132...
Page 64: ...DMT132 User Guide M211289EN B 62...
Page 70: ...DMT132 User Guide M211289EN B 68...
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