RECORDER OUTPUT ADJUSTMENT. At full-scale meter reading, the recorder circuit can be
adjusted to provide an output of from 25 to 100 millivolts D.C., with accurate correspondence of
voltage output to L. E.L. meter reading throughout the entire meter range. Adjust recorder output
level as follows:
With external recorder (minimum input impedance 10, 000 ohms) connected to recorder terminals of
control module (REC + and -), press and hold down TEST pushbutton.
Observe recorder response at full-scale control module L. E. L. meter reading.
Turn screw adjuster of REC potentiometer (R17 for CD800/830; R36 for CD802/832 Systems) on
printed circuit board to set recorder deflection at 100 percent point on recorder graph.
Release TEST pushbutton. Confirm that indicating meter and recorder return to zero.
CHECKING FAIL CIRCUITS. Fail circuits are generally tested at time of system installation, at
calibration, and for maintenance and trouble-shooting. Refer to Section4, Troubleshooting Chart 4-
1D, for procedures to check fail circuits.