Partlow MRC 7800, Installation, Wiring, Operation Manual

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Press the DOWN key, deLy will be displayed for 10 seconds and then SCAn for 10 seconds.
When the calibration is complete CAL2 will reappear.
CAL2 QUICK CALIBRATION
This routine will allow the operator to execute a rough calibration on their unit via the keypad
with no other equipment or disturbance to established wiring. It is intended to provide a
partial recovery from a calibration corruption where the necessary equipment indicated may
not be available. It should be noted that this is not intended as a substitution to the main
calibration procedure described earlier and may deter considerably from the accuracy of the
instrument.
With CAL2 displayed, press and hold the DOWN ARROW key, then press the SCROLL key.
Release both keys and the instrument will display hLd1 . Press and hold the UP ARROW key,
then press the SCROLL key. The display will momentarily blank and then CAL1 will be
displayed. Release both keys and depress the UP ARROW key. CAL will be displayed.
Error recovery:
See section 5.6 (page 40) for details. Insure that the millivolt source is connected correctly
and functioning properly.
The calibration can be exited when hLd1 or the calibration reference number is displayed by
pressing the SCROLL key.
5.4.3 CAL8 DATA TABLE INITIALIZATION
This routine initializes the logged data on the recorder.
With CAL8 displayed, while pressing the DOWN ARROW key, press the SCROLL key. The
display will momentarily blank while the initialization is in progress. Upon completion of the
routine, CAL8 will be displayed. The routine can be executed again or another routine
selected.
5.4.4 CAL 9 PEN CALIBRATION
This procedure is used to calibrate the pen(s). No special test equipment required.
Valid inputs must be connected to TB 4 and TB 5 before performing this calibration. With CAL
9 displayed , push and hold the DOWN key, then press the SCROLL key . Release both keys
and the display will indicate PEn1. For 2 Pen instruments, press the DOWN key to toggle the
display between pen 1 and pen 2. With desired pen displayed, press the SCROLL key.
FOR INSTRUMENTS WITH SOFTWARE REVISION R2.99 AND BELOW:
dELY will be displayed as the pen selected moves toward the center chart hub. PEnL will be
displayed; use the UP and/or DOWN keys to adjust the pen to the low end or 0% of the chart.
When adjusted, press the SCROLL key, SCAn will appear for 10 seconds and the pen
location value will be saved in memory. Next dELY will appear as the pen moves to the outer
edge or, 100% mark on the chart. PEnh will appear, use the UP and/or DOWN keys to adjust
the pen position to the proper 100% of chart position. Press the SCROLL key and SCAn will
be displayed as the pen position value is saved. Then dELy will be displayed as the pen
moves to about mid-scale. CAL9 will be displayed showing that the calibration is complete.
When the calibration is complete, with CAL9 displayed, press the UP key twice to properly
exit the calibration mode. CAL9 can now be repeated on the other pen of a 2 pen instrument
or another routine can be selected.