Omega M3185/1098 manual Humidity Calibration Kit, Instructions To Disassemble The Humidity Probes

HUMIDITY CALIBRATION KIT

The OMEGA® RH30-CAL Humidity Calibration Kit is needed to perform the humidity calibration of the RH31 Indicator and RH31-1/RH31-2 Probe assembly.

The Calibration Kit consists of two salt chambers held in a styrofoam base. One chamber contains a saturated salt solution of Lithium Chloride (to simulate 11% relative humidity). The other chamber contains a saturated salt solution of Sodium Chloride (to simulate 75% RH).

The RH31-3 cannot be field calibrated. No adapters are available.

INSTRUCTIONS TO DISASSEMBLE THE HUMIDITY PROBES

The potentiometer (pots) necessary for the humidity calibration procedures are located in the RH31-1/RH31-2 probes.

Each probe is slightly different, thus disassembly will vary. Perform the follow- ing procedures while referring to the corresponding steps pictured in the Figure for your particular probe type.

RH31 HUMIDITY/TEMPERATURE ADJUSTMENT

1.Please have RH30 Kit which OMEGA Engineering provide (30% RH).

2.Potential meter for adjustment is located about middle of handle portion of probe. (Only 1 potential meter)

3.As on Fig. 3 and 4, remove label covering potential meter.

Remove

LabelVR

Fig. 3. RH31-1 Probe

Remove

LabelVR

Fig. 4. RH31-2 Probe

4.Enter probe to calibration kit.

5.Turn potential meter to meet calibration kit reading. Once display is same or close to calibration kit, adjustment is done.

6.No calibration for temperature.

Figure 1. RH31 and RH31-1, RH31-2, RH31-2 Probes

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