Vaisala HMP60 Podręcznik Użytkownika Pobierz pdf (Strona 56)

User's Guide _______________________________________________________________________

54 ___________________________________________________________________ M211060EN-F

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

Filter Options on page 13. The order codes of the filters are listed in

section Options and Accessories on page 70.

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

output, serial output, or the MI70 indicator). As a humidity reference

you can use, for example, the Vaisala Humidity Calibrator HMK15.

Refer to chapter Technical Data on page 65 for accuracy specifications of

the probes.

1. Connect the power/signal cable or MI70 connection cable to the

probe, but do not power it up yet.

2. Remove the filter from the probe and 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.

Adjustment Procedure Using Serial Line

(HMP110, HMP110D and HMP113)

NOTE

If you are adjusting a probe that is in the analog output mode, see section

Terminal Application Settings for Analog Probes on page 34 for

instructions on how to start the probe in RS-485 mode.

One-Point Adjustment of RH

Measurement (HMP110, HMP110D and

HMP113)

To perform a one-point adjustment to the capacitance measurement of

the HMP110, HMP110D or HMP113 using serial line, you need:

- The Vaisala USB cable (Vaisala order code: 219690)

- PC with a terminal application.

- One humidity reference. One-point adjustment with a single

< 50 %RH reference will adjust the offset parameter of the

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Vaisala HMP60 Podręcznik Użytkownika Strona 56