Maintenance; Error Messages - Extech Instruments RH300 User Manual

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Maintenance

Cleaning and storage
1. The meter should be cleaned with a damp cloth and mild detergent when necessary. Do not use
solvents or abrasives.
2. Store the meter in an area with moderate temperature and humidity (refer to the operating and
storage range in the specifications chart earlier in this manual).
Battery Replacement
When the battery power falls low, the
'AAA' batteries by removing the rear battery compartment cover and accessing the battery
compartment. Observe correct polarity when placing the batteries in the compartment. Ensure that
the compartment cover is securely fastened when finished.
Never dispose of used batteries or rechargeable batteries in household waste.
As consumers, users are legally required to take used batteries to appropriate collection
sites, the retail store where the batteries were purchased, or wherever batteries are sold.
Disposal: Do not dispose of this instrument in household waste. The user is obligated to take end-of-
life devices to a designated collection point for the disposal of electrical and electronic equipment.
Other Battery Safety Reminders
Never dispose of batteries in a fire. Batteries may explode or leak.
o
Never mix battery types. Always install new batteries of the same type.
o

Error Messages

An error message will appear on the display if the meter fails an internal diagnostic test.
1. ER1: Relative Humidity failure. Repair/replacement is necessary.
2. ER2: Internal temperature failure. Repair/replacement necessary.
3. ER3: Reference resistance failure. Repair/replacement necessary.
4. ER4: Internal temperature is out of range.
5. ER5: External temperature is out of range.
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symbol will appear on the LCD. Replace the two (2) 1.5
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