Vaisala HMP60 Podręcznik Użytkownika Pobierz pdf (Strona 59)

Chapter 5 _______________________________________________________________ Maintenance

VAISALA ________________________________________________________________________ 57

8. Use the ERRS command to see that no errors are active:

errs

9. Use the SEND command to verify the currently measured RH

value:

send

T= 22.9 'C RH= 11.1 %RH Td= -8.0 'C

10. Give the CRH command with the RH value of the humidity

reference as a parameter:

crh 11

11. After entering the correction, unplug the USB cable from the probe.

Insert the probe in the NaCl salt chamber (75 %RH) and wait for

20 – 40 minutes for humidity and temperature to stabilize.

12. Connect the USB cable to the probe and use the SEND command

to see the currently measured value.

13. Give the CRH command with the RH value of the humidity

reference as a parameter:

crh 75

14. Check with the L command that the user adjustment parameters

have changed.

If you wish to remove the effects of RH calibration (returning the

RH measurement of the probe to the factory calibrated state), see

section Clear Adjustment of RH Measurement on page 45.

One-Point Adjustment of T Measurement

(HMP110, HMP110D, HMP113, and

HMP110T)

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

the HMP110, HMP110D, HMP113, or HMP110T using serial line you

need:

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

- PC with a terminal application.

- One known and stable temperature reference.

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Vaisala HMP60 Podręcznik Użytkownika Strona 59