2000-OSM, F1 7-33
a. With authorized permission, remove one wire from input device of loop to be tested and
connect the ammeter in series (voltage parallel). Perform step 9 to determine if loop wiring to
input device is functional.
b. Check and verify input device input requirement and configuration.
c. Determine if an input shunt resistor is needed and determine value.
d. Input device may need calibrated or rescaled.
TP 38: DIGITAL I/O PCB
CAUTION
It is the customer’s responsibility to ensure that the area is safe and and hazard-
free, and will remain so the entire time the analyzer is open. This responsibility
includes ensuring adequate ventilation in analyzer shelter and obtaining proper
work permits, etc.
See "AIR PURGING" in Section 4 for the override function. Do not perform
override until you have read Section 4 completely and you understand and can
perform the procedure requirements.
1. On the Background screen, press the F1 (Exit to Commands) soft key.
2. On the Commands screen, cursor down to TESTING/SETUP and then press the F2 (Diagnostic
Tests) soft key.
3. On the Diagnostic Tests screen, cursor down to DIAGNOSTIC TOOLS and then press the F2
(Digital Output Test) soft key and follow screen instructions.
4. Connect voltmeter between output terminal of Digital PCB and output common using proper
polarity (these are transistor outputs).
5. If Digital I/O PCB functions, check for data entry.
6. If Digital I/O PCB does not function, it is defective. Replace the Digital I/O PCB.
TP 39: LOW CARRIER PRESSURE
CAUTION
It is the customer’s responsibility to ensure that the area is safe and and hazard-
free, and will remain so the entire time the analyzer is open. This responsibility
includes ensuring adequate ventilation in analyzer shelter and obtaining proper
work permits, etc.
CAUTION
See "AIR PURGING" in Section 4 for the override function. Do not perform
override until you have read Section 4 completely and you understand and can
perform the procedure requirements.
1. Check to ensure that the carrier has not been shut off. If so, restore carrier supply.
2. Disconnect power and shut off air to analyzer.
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