(c)
Remove the pressure transducer wire harness from J9 on the
control board.
(d) Plug the wire harness plug from the RTD Test Box into J9.
(e) Connect the meter leads from the digital voltmeter (dvm) to the
RTD Test Box.
(f)
Turn the rotary switch on the RTD Test Box to the Vr position.
(g) The meter should read 5.00vdc + 0.25 volts. If this is incorrect, the
power supplies or the adc may be defective.
(h) Record the actual reference voltage.
(2)
Calibrate the chamber temperature.
(a)
Turn the rotary switch on the RTD test box to the Ch position.
(b) Place toggle switch on the RTD test box to zero position.
(c) Adjust the chamber zero potentiometer, R-92, until the meter reads
0.196vdc + 0.005 volts.
(d) Place toggle switch on the RTD test box to Span position.
(e) Adjust the chamber span potentiometer, R-92, until the meter reads
the reference voltage recorded earlier, + 0.05 volts.
(f)
Repeat steps (a) through (d) until both readings are within
specification.
(g) Always make the final adjustment or check with the toggle switch in
the zero position.
(3)
Calibrate the jacket temperature.
(a)
Turn the rotary switch on the RTD test box to the Ja position.
(b) Place toggle switch on the RTD test box to zero position.
(c) Adjust the jacket zero potentiometer, R-103, until the meter reads
0.196vdc + 0.005 volts.
(d) Place toggle switch on the RTD test box to SPAN position.
MD0354
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