Campbell 21X Spezifikationen PDF herunterladen (Seite 14)

Number 4250-2000

Revision 1.0

Date MAY 1996

Page 5 of 7

After a few seconds delay, the memory check results will be

displayed. If all memory is installed and operating, the display will

read "11:111111." The eight (8) characters in the display represent

the eight (8) memory sockets numbered from left to right. A "1"

indicates a good chip is in the corresponding socket. A "0" indicates

the socket is empty or an error was detected in the chip. The five (5)

left-most characters of the display represent the 8K ram chips. The

three (3) right-most characters of the display are the 8K PROMs.

If the memory check results indicate that one or more memory chips

are faulty, return the instrument to Campbell Scientific for repair.

4.2 ANALOG INPUT CHECKS

CONNECT Connect the Datel voltage calibrator to the datalogger using the

VOLTAGE datalogger "analog inputs" test cable. This cable provides a

CALIBRATOR connection from the voltage output of the calibrator to each of the

eight (8) analog input channels of the datalogger.

DOWNLOAD Download the datalogger test program (21X_TEST.DLD) to the

TEST PROGRAM datalogger to be tested using the Campbell Scientific datalogger

communications software (SMCOM) and the Campbell Scientific

SC532 Peripheral Interface Module.

RUN TEST Press

on the datalogger to compile and run the test program.

PROGRAM

SET VOLTAGES Set the calibrator to the input voltages specified on the Campbell

21X Datalogger Servicing Documentation Form (Figure 4-1). All

input voltages are specified in millivolts. All datalogger readings

should be recorded as millivolts.

RECORD Enter

on the datalogger and record the datalogger display

DISPLAY reading (storage locations 01 - 08) for each of the eight analog

READINGS channels at each of the three input voltages specified on the

Campbell 21X Datalogger Servicing Documentation Form.

If the datalogger readings for any of the analog channels differ from

the specified values by more than ± 5.0 millivolts, return the

datalogger to Campbell Scientific for recalibration.

4.3 ANALOG OUTPUT CHECKS

The test program sets up a continuous DC voltage output on both analog output ports

(CAO 1 and CAO 2).

MEASURE Measure the output voltage at CAO ports 1 and 2 with a calibrated

OUTPUT and certified 4 ½ digit voltmeter. Record these measurements (in

VOLTAGE millivolts) on the Campbell 21X Datalogger Servicing

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