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PROGRAM
CONFIGURE
VIEW LOG
SELECT OPTION: (<-->)
RUN DIAGNOSTICS
SELECT DIAG: (<-->)
TEST 'RAM'
5.2.1 Test 'RAM'
SELECT DIAG: (<-->)
TEST 'RAM'
...TESTING 'RAM'
'RAM' PASSED
5.2.2 Test 'ROM'
SELECT DIAG: (<-->)
TEST 'ROM'
...TESTING 'ROM'
'ROM' PASSED
The sampler automatically reverts to the SELECT DIAG menu
after displaying the test results or when the test is complete or
expired.
To start the diagnostics from the Main Menu screen:
1. Select the CONFIGURE option and press Enter.
2. Press the Previous button until the RUN DIAGNOSTICS
option is displayed. Press Enter.
3. The sampler displays a diagnostic option. Press Enter to
start the test or press the Next or Previous buttons to
scroll through the diagnostic options.
Refer to the sections below for specific information about each
test.
The TEST 'RAM' diagnostic tests the sampler's memory that is
used dynamically by the sampler's processor and holds program
settings and sample event data. This test loads 16-bit words into
memory and reads it back to confirm that the memory is working
correctly.
To run the test:
1. Select the TEST 'RAM' option and press Enter.
2. Wait for the sampler to complete the test.
3. When finished, the sampler displays the test results.
If the sampler reports 'RAM' FAILED contact your authorized Isco
service facility or the Teledyne Isco factory.
The TEST 'ROM' diagnostic tests the sampler's Read-Only
Memory which holds the sampler software. It calculates a
checksum total of the data held in this memory and compares it
with a known value. If the checksum matches, the ROM test
passes.
To run the test:
1. Select the TEST 'ROM' option and press Enter.
2. Wait for the sampler to complete the test.
3. When finished, the sampler displays the test results.
If the sampler reports 'ROM' FAILED contact your authorized Isco
service facility or the Teledyne Isco factory.
Isco 4700 Refrigerated Sampler
Section 5 Maintenance
5-7
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