General Tools and Instruments DCO1001 - Manual (Page 3)

CONTROLS AND INDICATORS
LCD Display 8888 ppm
Max 1888
1. Primary display: Current CO value.
2. Secondary display: Max CO value
3. Low battery indicator.
Function Keys
1. Ф Turns the meter on and off. Selects the alarm value.
2. Turns the backlight on and off.
Switch temperature unit C and F.
Reset the maximum CO value.
Select the calibration value.
3. Ф + : Enter calibration mode.
OPERATING INSTRUCTIONS
1. Power on/off
Press Ф to turn the meter on and off. When meter is on,
the preset alarm value and current air temperature will blink
on the LCD. The meter is now running its Self- Test and will
finish in about 15 seconds with a short beep. The meter will
then be in the measuring mode.
A 25 ppm
72 F
IMPORTANT:
Turn on the meter in an area free of CO since high
CO level may cause failure in passing Self-Test.
5 2
OPERATING NOTICE
1. Keep the meter off from electromagnetic interference
(EMI) which may cause erratic readings.
2. Recovering time is required when meter exposed
to high level CO. The longer the exposure, the longer
recovering time is needed.
3. Self- Test after power is on to the test sensor and
circuit condition.
TROUBLESHOOTING
• Power on but no display
a) The power must be on for at least 300ms.
b) Make sure the batteries are in good contact and
correct polarity.
c) Replace a new battery and try again.
• Displays disappears
Check whether the low battery indicator shows before
display disappears. If so, replace with new battery.
• Calibration failure
a) Check if the low battery indicator shows before
calibration. If so, replace with new battery and try again.
b) Make sure the standard gas is correct.
E 2. : The value is underflow.
E 3. : The value is overflow.
E 4. : The value is erroneous.
E 31.: A/D failure, return the meter to your distributor for
repair.
E 33.: Measurement circuit failure, return the meter to
your distributor for repair.
E 35.: Self-Test failure. Turn on the meter again in the
other area free of CO. Sensor failure. Return
the meter to your distributor for repair.