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TROUBLE SHOOTING
Front dark
-
no
instrument power.
Process display
shows
CCCC
-
Open thermcouple. Short
terminals 1 and 2. Process display should indicate
temperature at back of case. Repair or replace thermocouple.
About Half or Twice Expected Reading
-
Check position of
°C/°F
switch. Short 1 and 2 to read room temperature. 22-30
is
°C,
70-85
is
°F.
About
30%
Error
-
Wrong thermocouple type.
Disconnect
couple.
above 2500°F.
"J"
units over range above
14OO°F,
"K"
No Heat
-
No heater power, heater wiring, wrong output module.
Heat Stays On
-
Welded relay contacts, shorted output module,
or shorted power handler.
Process Display Shows OOOO Or Initially Displays Room
Temperature Then Counts Down Scale As Process
Warns
-
Check
for reversed thermocouple.
Display blinks, entered values change
-
Caused by electromagnetic
interference
(EMI).
Supress arcing contacts in system to
eliminate high voltage spikes,
seperate sensor and controller
power wiring from "dirty" power lines. Ground heated devices.
Unit Repairs
It is recommended that units requiring service be returned
to an authorized service center. When a controller is
returned for service, a note stating the problem should
accompany the unit.
NOTE: Warranty is void when units are modified by the
customer or other non-authorized parties.
A spare parts list can be supplied upon request if complete
model number, serial number and temperature range is supplied.
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