Battery replacement, Specifications – Extech Instruments 42275 User Manual
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Battery Replacement
Follow these steps to remove and replace the battery:
1. Remove the four (4) rear Phillips-head screws
2. Ensure that the o-ring remains in its groove.
3. Remove the expired battery.
4. Insert a new battery (CR2) ensuring correct polarity.
5. Fasten the four rear screws.
Specifications
Display
3-digit
multi-function
LCD
Front panel status LEDs
Two (2): RECORD and ALARM
Temperature range
-40 to 185
o
F (-40 to 85
o
C)
Temperature resolution
0.1
o
up to 99.9
o
; 1
o
from 100
o
to 185
o
Temperature accuracy
±1.2
o
F (0.6
o
C) from -4 to 122
o
F (-20 to 50
o
C)
±2.4
o
F (1.2
o
C) all other ranges
Humidity range & accuracy 0.0 to 99.9% Relative Humidity; Accuracy: ± 3%
Datalogger storage
16,000 temperature readings (8,000 temperature and 8,000
humidity readings on the 42270)
Sampling rate
Programmable from 1 second to 12hours
Power supply
One 3.6V ½ ‘AA’ lithium battery
Battery Life
1 year: 5 second sample rate in sleep mode
3.8 months: 24 hour sample rate in non-sleep mode
Low battery indicator
Display shows ‘LO’
Cable length
60’’ (150cm)
Operating Temperature
32 to 104
o
F (0 to 40
o
C) (docking station)
Operating Humidity
10 to 80% RH (docking station)
Dimensions
4.9 x 3.6" (124 x 92mm)