R7500C WIDE RANGE PROPORTIONAL TEMPERATURE CONTROLLER
NOTE:
1. To ensure correct voltage readings in the
following tests, a 500-ohm resistor should be
substituted for the compensation sensor (if its
temperature is not near 75F [24C]) and “comp.
ratio” should be set at 20.
2. If the controller output is not connected, wire a
390 ohm “load” resistor from orange to
yellow wires.
R7500
Adjust setpoint knob to correspond to the ambient
temperature at the main sensor. Set the proportional band
at 5. The output voltage between points Y1 and (+) should be
approximately one-half power supply voltage minus 0.6 Vdc. If
this reading is not found, the device can be recalibrated by
adjusting the calibration potentiometer No. 2 (left center of
panel, see Fig. 6) until this reading is reached.
5
95-7205
