West Control Solutions MRC 7000 Recorder Manual - Manual (Page 40)

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TABLE 4-2 TEST PROCEDURES AND DESCRIPTION
Test Description
Test 1 Microprocessor internal RAM test. Used to check the processor RAM to
make sure it is functioning correctly.
Test 2 External RAM test, used to test the RAM chip for proper function.
Test 3 EPROM checksum test, used to check that the EPROM program is correct.
Test 4 External RAM checksum test; instrument test and identifies how many
times Errors16 or 17 have occurred.
Test 5 Verifies that all keys are functional and all LEDs are working.
Test 6 Used to verify that all relays and solid state relay driver outputs are working
correctly.
Test 7 This procedure will allow operator to adjust the current output value to
check the output and to test the operation of the external device.
Test 8 Pen and chart motor operational check.
Test 9 Verifies that the auxiliary inputs are functioning properly.
Test A Communications Hardware Test.
4.5.1 TEST 1 INTERNAL RAM TEST
Tests the Random Access Memory internal to the microprocessor. No special test equipment
is required.
With tSt1 displayed, press and hold the DOWN key, then press the SCROLL key. tSt1 will be
displayed momentarily while the test is in progress. Upon successful completion, the instru-
ment will proceed to Test 2.
4.5.2 TEST 2 EXTERNAL RAM TEST
Tests the battery backed-up RAM external to the microcomputer. No special test equipment is
required.
After completion of Test 1, tSt2 will be displayed momentarily while the test is in progress.
Upon successful completion, the instrument will proceed to Test 3.
4.5.3 TEST 3 PROGRAM EPROM TEST
This is a checksum test to verify data integrity of the stored program. No special test equip-
ment is required.
After completion of Test 2, tSt3 will be displayed momentarily while the test is in progress.
Upon successful completion of Test 3 tst1 will be displayed.
4.5.4 TEST 4 EXTERNAL RAM CHECKSUM TEST
This is a checksum test to verify the integrity of data stored in RAM and indicate the number
of times the instrument has had an Error 16 or 17. The unit may have automatically recovered
from these errors. No special test equipment is required.
With tst4 displayed, press and hold the DOWN key then press the SCROLL key. The display
will blank momentarily, then momentarily display two numbers, and then tst4 will be dis-
played. These numbers indicate the number of times Error 16 and 17 have occurred respec-
tively. Test 4 can be executed again, or another test may be selected.