Vaisala HUMICAP HMT330 SERIES, Руководство пользователя

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User's Guide ______________________________________________________________________
150 _________________________________________________________________ M210566EN-J
Changing the Sensor
The user can change the HUMICAP180 and HUMICAP180R sensors. If
the transmitter has the chemical purge and/or warmed probe option
(which utilize the HUMICAP180C or HUMICAP180RC sensor), the
sensor cannot be changed by the user.
Changing the sensor should be considered corrective maintenance, and it
is not necessary in normal operation. If the accuracy of the transmitter
does not seem to be within specification, it is more likely that the
transmitter is in need of calibration and adjustment, and not sensor
replacement. Refer to chapter Calibration and Adjustment on page 155.
NOTE
When replacing the sensor, the new sensor must be of the same type as
the old sensor (for example, HUMICAP180R). The sensor type can only
be changed at a Vaisala Service Center.
1. Remove the filter from the probe. See the instructions in section
Changing the Probe Filter on page 149.
2. Remove the damaged sensor and insert a new one. Handle the new
sensor by the plastic socket. DO NOT TOUCH THE SENSOR
PLATE.
3. Perform a calibration and adjustment as instructed in section
Relative Humidity Adjustment after Sensor Change
on page 160.
4. Attach a new filter on the probe. When using the stainless steel
filter, take care to tighten the filter properly (recommended force
5 Nm).
0508-079
Figure 75 Changing the Sensor
The following numbers refer to Figure 75 above:
1 = Pull out the sensor
2 = Plastic socket