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TABLE 5-2 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 the check that the EPROM program is
correct.
Test 4 External RAM checksum test; instrument test and identifies how many times
Errors 16, 17 and 18 have occured.
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 This is the same as Test 7 except it is for Output 2.
Test 9 Auxiliary Input Test. Allows for the viewing of the optional auxiliary input
voltage level.
Test A Communications Hardware Test
5.3.1 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
instrument will proceed to Test 2.
5.3.2 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.
5.3.3 TEST 3 PROGRAM EPROM TEST
This is a checksum test to verify data integrity of the stored program. No special test
equipment 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.