Introduction
The CO 91 meter tests CO levels in heating appliances, ambient air, around
fossil fueled appliances like cookers and grills. It also helps you test
residential and commercial CO alarms and also shows CO MAX - the
m aximum level of CO recorded. The CO 91 can also be used as a digital
thermometer, ideal for testing hot water or refrigera t i o n .
Features include
• Measure ambient CO levels
• Measure CO concentration in flue gas
• CO Max capture
• CO accurate to ±5% of reading
• Temperature measurement
• Auto-zero at power up
• Link to optional infrared printer
Safety Notes
Before using this meter, read all safety information carefully. In
this manual the word
"WARNING"
is used to indicate conditions
or actions that may pose physical hazards to the user. The word
"CAUTION"
is used to indicate conditions or actions that may
damage this instrument.
WARNING!
This meter extracts combustion gases that may be toxic in relatively
low concentrations. These gases are exhausted from the back of the
instrument. This meter must only be used in well-ventilated locations
by trained and competent persons after due consideration of all the
potential hazards.
International Symbols
C o n t rols and Indicators
1.
Power Push-button :
Press “ “ button to switch the
unit ON in fresh air outside the property about to be tested. This
lets the meter auto calibrate its sensors properly.
When turned on the meter beeps four times and displays on its
top line the date, time and model number. Its bottom line counts
down from 60 until the sensors are ready to use - This normally
takes 20 - 30 seconds but may take longer as sensors get older. If
the meter will not auto calibrate, its sensors need to be replaced
or recalibrated by an authorized repair center.
When countdown is finished the displays top line shows the last
selected function and the bottom line displays whatever the rotary
dial is turned to.
Press “ “ button again to switch the meter OFF. The display
counts down from 30 with the pump on to clean the sensors with
fresh air - If the probe is still connected, make sure the meter and
probe are in fresh air.
Press “
HOLD/ENTER
” if you want to stop the countdown and
return to making measurements.
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