Battery replacement – Vaisala HMT140 User Manual

Page 57

Battery Replacement

M211488EN-C

For calibration of HMP110 probes, refer to the supporting

documentation available on the Vaisala website.

Battery Replacement

To replace the batteries and reset the battery meter of the

HMT140:
1

Open the case. Use your thumb to press and hold the

release tab, located between the two glands, then pull the

cover out and up with your fingers. See HMT140

tab.

Turn the power switch off.

Remove the batteries by pulling them up firmly. If the

battery does not come out easily, gently pull back on one

of the battery holder tabs first.

Note:

Use only Vaisala supplied batteries,

part #: 236318SP Vaisala 3.6V Lithium

Thionyl Chloride batteries.

After replacing the batteries, press and hold the

SERVICE button and turn the power switch on. The LED

light will flash and the device will beep eight times.

Release the SERVICE button. At this point, the battery

meter is also reset.

CAUTION:Remove batteries before shipping