Vaisala HMP42 - Manual (Page 15)

HMI41 AND HMP42
M210317EN-A Operating Manual
11
5. CALIBRATION
5.1 How to use the HMP42 calibration adapter
As the HMP42 probe diameter is extremely small, the probe has a special
calibration adapter for inserting the probe into a salt chamber (e.g. in the
HMK15 calibrator).
NOTE
Be extremely careful when inserting the probe into the
calibration adapter: do not bend or break it.
The probe is inserted into the adapter with the steel grid on; this protects the
sensor and prevents it from breaking. Unlike other humidity probes, the
HMP42 is calibrated with the steel grid on and thus, the probe naturally
requires a slightly longer stabilization time (approx. 30 minutes).
Figure 5.1.1 HMI41, HMP42 and calibration accessories
Figure 5.1.2 Insert the probe head into the calibration adapter