Extech Instruments CO80 Manual page 44

Appendix C Trouble Shooting Guide (Cont.)
Negative
temperature
reading
Cannot change
header
Inaccurate
pressure readings
Cannot turn
instrument off
Thermocouple Remove
plug is reversed thermocouple plug
in socket and ensure wider pin
is inserted into wider
socket
Forgotten or lost Contact Extech
security number
Instrument has Disconnect pressure
been switched tubing from instrument
to pressure and re-zero pressure
screen whilst to atmosphere (see
connected to a Section 5.1)
pressure source
High level of Allow unit to run in
carbon clean air until 30
monoxide still second countdown
being detected starts
by the sensor
44 CO80 V3.1 04/06