Vaisala HMM30C Operating Manual

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U312en-1.3

HMM30C humidity module

GENERAL

The HMM30C humidity module is an open print, which is connected with two screws. Its

small sensor head is separated from the circuit board with a cable. Mounting dimensions

are shown in Figure 1.

215 (8.46)

Make connections according to Figure 2.

99-11-29

HMM30C MODULE

Figure 1 Mounting dimensions in mm (in inches)

OUT

V/mA

Figure 2 Electrical connections

1500 (59.05)

DC/AC

POWER

SUPPLY

HMM30C

Operating Manual

42.5 (1.67)

24 (0.94)

Table of Contents

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Page 1 Operating Manual HMM30C humidity module GENERAL The HMM30C humidity module is an open print, which is connected with two screws. Its small sensor head is separated from the circuit board with a cable. Mounting dimensions are shown in Figure 1.
Page 2 ONE POINT HUMIDITY CALIBRATION The calibration can be checked with Vaisala’s one point calibrator: the HMI41 indicator equipped with a suitable reference probe (e.g. HMP46) and the calibration cable 19165ZZ. Make the necessary adjustments with the dry-end calibration potentiometer. If a more accurate two point calibration is preferred, the HMK15 or the HMK13B calibrators with salt solutions are recommended.
Page 3 If there is a reason to believe that such conditions exist, it is recommended to check the calibration at a shorter interval after taking the HMM30C into use. Make the first check/adjustment after 6 months and 12 months and later extend the interval to one year.
Page 4 HUMICAP K HUMICAP humidity sensor GUARANTEE Vaisala issues a guarantee for the material and workmanship of this product under normal operating conditions for one (1) year from the date of delivery. Exceptional operating conditions, damage due to careless handling or misapplication will void the guarantee.