Changing the sensor in the hmp155, Calibration and adjustment – Vaisala PTB330TS User Manual
Page 46
User's Guide ______________________________________________________________________
44 ___________________________________________________________________M210983EN-A
Changing the Sensor in the HMP155
If your HMP155 uses the HUMICAP
®
180R sensor, you can change it
yourself without sending in the probe for service. After changing the
sensor, you must calibrate the new sensor using serial line.
For instructions on how to change the sensor and calibrate it, refer to the
HMP155 User’s Guide. It is available for download from
www.vaisala.com.
Calibration and Adjustment
The PTB330 and HMP155 are fully calibrated and adjusted as shipped
from factory. Calibration must be done always when there is reason to
believe that the device is not within the accuracy specifications.When
defining the calibration interval the long term specifications and the
requirements of the customer must be taken into consideration. Contact
Vaisala Service Centers for details. It is recommended that calibration
and adjustment should be carried out by Vaisala. See
Users can calibrate the PTB330 barometer using serial port commands.
Using the service port is recommended; see section
. The calibration and adjustment procedure, as
well as the calibration commands, are described in section
and Adjustment of PTB330 on page 45
The HMP155 can be adjusted using the MI70 indicator, or through the
serial port. This document explains the adjustment using the MI70
indicator. For instructions on using the serial port, refer to the HMP155
User’s Guide.
CAUTION
HUMICAP
®
180RC sensors cannot be changed by the user.