Vaisala HMP60 Guía de usuario descargar pdf (Pagina 61)

Chapter 5 _______________________________________________________________ Maintenance

VAISALA ________________________________________________________________________ 59

Adjustment Procedure Using MI70 Indicator

(HMP110, HMP110D and HMP113)

One-Point Adjustment of RH

Measurement (HMP110, HMP110D and

HMP113)

NOTE

If you want to perform a

two-point adjustment instead of a one-point

adjustment, use

the serial line. See Two-Point Adjustment of RH

Measurement (HMP110, HMP110D and HMP113)

on page 56.

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

the HMP110, HMP110D or HMP113 using the MI70 indicator, you

need:

- MI70 indicator.

- Connection cable for MI70 indicator (219980).

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

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

measurement. One-point adjustment with a single > 50 %RH

reference will adjust the gain parameter of the measurement.

The procedure below uses the HMK15 Humidity Calibrator. LiCl salt (11

%RH) is used as the reference point.

1. Connect the probe to Port I of the MI70 indicator.

2. Turn on the MI70 indicator.

3. Start the adjustment sequence from Main menu > Functions >

Adjustments.

4. MI70 notifies you that automatic power off is disabled during

adjustment mode, press OK to acknowledge.

5. Select the RH parameter when prompted.

6. Now the adjustment mode is on, press ADJUST to select the

adjustment method.

7. Select 1-point adjustment, press SELECT. Press OK to continue.

8. Insert the probe in the LiCl salt chamber of the humidity calibrator

(11 %RH).

You can follow the stabilization from the GRAPH display. Press

READY when the reading is stabilized.

9. Give the reference humidity value by using the arrow buttons.

Press OK.

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Vaisala HMP60 Guía de usuario Pagina 61