Lincoln Impinger Conveyor Ovens 1100 Series - Manual (Page 6)

S/N 2011383 and above (cemented to tach. coupling) to break the infra-red light beam
REFER TO PAGE B15 of the optical encoder(mounted on gear motor), producingelectri
cal pulses that are transmitted to the display. The display con
verts these pulses into a read-out of minutes and seconds.
The temperature portion of the Time/Temp Display uses a Ther
mistor Probe to sense oven temperature. The thermistor outputs
a resistance proportional to the oven temperature. This resis
tance is then converted by the display into a temperature reading.
AUTOMATIC COOL DOWN When this oven is started, the time delay relay timing circuit is
enabled, permitting the oven fans to run for approximately 20
minutes after the oven is shut off, to cool the oven. The Time
Delay Relay will keep the coil of Relay closed, maintaining opera
tion of the Main Fan Motor and the cooling fans
Impinger II - 1100 Series Service Manual - International 6