Vaisala HMP110 Podręcznik Użytkownika Pobierz pdf (Strona 48)

User's Guide ______________________________________________________________________

46 __________________________________________________________________ M211060EN-A

Changing the Filter

The filter on the probe should be replaced when it is damaged or dirty.

1. Turn the filter counter-clockwise to loosen it.

2. Remove the filter from the probe. Be careful not to touch the

sensors with the filter. Without the filter in place, the sensors are

easily damaged – handle the probe carefully.

3. Install a new filter on the probe, and tighten it so it is finger-tight.

Make sure the filter sits straight and meets the threads properly.

New filters can be ordered from Vaisala. For available filters, see section

Filter Options on page 15. The order codes of the filters are listed in

section Options and Accessories on page 60.

Calibration Procedure

To calibrate your probe, you need a known stable humidity or

temperature reference, and a way to read the output of the probe (analog

or serial). As a humidity reference you can use, for example, the Vaisala

Humidity Calibrator HMK15.

Refer to chapter Technical Data on page 57 for accuracy specifications of

the probes.

1. Connect the power/signal cable to the probe, but do not power it up

yet.

2. Place the probe in the reference environment. For example, you can

use a NaCl salt chamber (75 %RH) as the humidity reference.

3. Wait for 20 – 40 minutes for the reading to stabilize.

4. Power up the probe and wait for one minute.

5. Check the measurement reading, and compare it with the reading

that the reference should produce.

1 2 ... 43 44 45 46 47 48 49 50 51 52 53 ... 63 64

Brak uwag

Vaisala HMP110 Podręcznik Użytkownika Strona 48