Maintenance; General Cleaning; Battery Replacement - Extech Instruments RH250W User Manual

6

Maintenance

Warning: Do not open the housing or sensor module. Service should only be performed by
factory personnel, there are no user-serviceable components in this device.

6.1 General Cleaning

Wipe the housing with a damp cloth as necessary to clean. Do not use abra-
sives or solvents to clean this device.

6.2 Battery Replacement

This device is powered by three (3) 1.5 V (AAA) batteries. When the low bat-
tery symbol
1. Switch the meter off and remove the rear battery compartment cover.
2. Replace the batteries, observing correct polarity. Always use batteries of
the same type.
3. Secure the battery compartment before use.
hold waste.
#NAS100074; r. AA/78956/78963; en-US
CAUTION
appears, replace the batteries immediately, as explained below.
Do not dispose of used batteries or rechargeable batteries in house-
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