Lincoln Impinger Conveyor Ovens 1634-000-EA - Manual (Page 11)

Low Profile – 1600 Advantage Series Service Manual – International 11
secondary readings are not achieved,
replace transformer.
Temperature display If proper voltage is present at terminals
1,2, and 3 on temperature display, but
but the display is not lighted, recheck
all connections for tightness. If
temperature display is still not operating,
replace the temperature display.
Temperature display Thermocouple Connect the thermocouple of a
Inaccurate, erratic pyrometer to the thermocouple on
Or inoperative the temperature control board. (be sure
to maintain proper polarity of
thermocouple leads—see adjustment
section for proper procedure.) The
pyrometer will indicate oven temperature
display. Measure D.C. millivolts of
thermocouple at the temperature display.
See thermocouple chart in section D for
proper readings. Replace thermocouple
if proper readings are not achieved. If
readings are correct on the thermocouple,
replace temperature display.