Amprobe TMD90A Dual-Input-Digital-Thermometer - Manual (Page 13)

8
Troubleshooting
Problem Solution
Thermometer does not turn
on.
• Check battery voltage and
replace discharged battery.
• Verify that battery clips grip
the battery post tightly.
Dashes appear in the T1 and
T2 data screens.
• Insert missing
thermocouple.
Dashes appear in T1 and/or T2
data screens with
thermocouples inserted.
• Measure resistance of
thermocouples to ensure
they are not broken
internally.
• Clean the thermocouple
and restart.
Temperature drifts from a
known value in a controlled
environment
• Verify that thermocouple
type matches the displayed
icon.
• Clean and dry the
thermocouple blades and
allow to air dry.
• Confirm temperature with a
known good thermocouple.
Replace the defective
thermocouple if required.
TMD90A_all.pdf 12 3/23/2007 3:22:49 PM