Amprobe CM100 Carbon-Monoxide-Meter - Manual (Page 9)

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Make sure the standard gas is correct. 2.
E 2.: The value is underflow.
E 3.: The value is overflow.
E 4.:The value is “error”because of some original data.
E 31.: A/d failure, return the meter to the dealer for repair.
E 33.: Some measurement circuits failure, return the meter to the dealer for replacement or
repair.
E 35.: Self-test failure. Turn on the meter again in other area free of Co.
Sensor failure. Return the meter to the dealer for repair.
pRECAUtIoNS
Keep the meter away from electromagnetic interference (eMi) which may cause erratic 1.
readings.
Recovering time is required when meter exposed to high level Co. The longer the exposure,
2.
the longer recovering time is needed.
Self-Test after power on is to test the sensor and circuit condition.
3.
tEChNICAL SpECIFICAtIoNS
Co range: 0~999ppm
Resolution: 1 ppm
Accuracy: ± 20% at 0~100ppm; ±15% at 100~500ppm (at 20°C±5% and 50%±20%Rh)
Battery: 3 AAA alkaline. battery life is 250 hours when backlight is off and 35 hours when
backlight is on.