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When running the following two tests, Test Valve Relays or Test Alarm Relays, it
is useful to assign display flag 14, Status of Valve and Alarm Relays, to one of the
display lines. Refer to Part IV: Display Flags for more information on configuring the
NOTE
display. The flagged display line will read as follows:
4 - Concentration Alert
3 - Range Alert
Test Alarm Relays
Verifies function of alarm contacts. All alarm relays are energized (equal to
1) when test begins. At the "Number Key to Toggle?" prompt, press 2 for Sys-
tem Alarm contacts, 3 for Range Alert contacts, or 4 for Concentration Alert
contacts. Press
will toggle to de-energized (equal to 0).
Test Valve Relays
Verifies function of valve relays. All valve relays are de-energized (equal
to 0) when test begins. At the "Number Key to Toggle?" prompt, enter the
number of the relay to test (1 through 4). Press
to quit. Selected valve contacts will toggle to energized (equal to 1).
Test Watchdog
Introduces an anomaly in the computer logic which generates a system re-
set. Press
to cycling the power; configuration values are saved and analyzer does not
have to be reconfigured.
Test Serial Port
Verifies the data flow to the RS-485 serial port. The serial port connector
must be removed from the port to run this test. If using the four-wire serial
communication mode, a feedback loop must be provided by connecting
2W+/4WTX+ to 4WRX+ and 2W-/4WTX- to 4WRX-; refer to Figure 11b (p.
5-2). Press
Test RAM
Verifies the operation of the computer's random access memory. At "System
Will Not Run - Remove Power Now" prompt, turn off AC source. Wait at
least two minutes and turn on power. If RAM test is successful, "RAM Tested
Good - Enter To Continue" will be displayed. Press
tion will be displayed for several seconds and then display will return to
normal operation screen. Note that this test is run every time the analyzer
is rebooted.
Regular Maintenance
•
Run analyzer cell calibration cycle and zero offset cycles (if applicable) periodically at
user discretion.
•
Check sample lines and connections for leaks on a regular schedule.
•
Replace the moisture generator annually.
0 1 0 -Alm 0 0 0 0 1 0 1 0 -Vlv
Relays 8
Not Used
2 - System Alarm
to begin test or
enter
to begin test or
enter
to begin test or
enter
1 - Sample
2 - Moisture Generator
→
5
3 - Reference
4 - Valve Signal
to quit. Selected alarm contacts
cancel
enter
to quit. Note that this reset is similar
cancel
to quit.
cancel
to begin test or
cancel
; boot up informa-
enter
Serial Communication 7-3
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