PART THREE - OPERATION
SECTION 5 - TEST/MAINTENANCE
Rev. 6-1100
Model P33 pH/ORP Analyzer (panel-mount 1/4 DIN)
65
S
ECTION
5
5.1 STATUS Checking
(analyzer, sensor,
and relays)
The analyzer has TEST/MAINT menu screens to:
•
Check system status of analyzer, sensor (measurement
signal and temperature inputs), and relays.
•
Hold analog outputs at their last measured values.
•
Manually reset all relay overfeed timers at once.
•
Provide analog output test signals to confirm operation
of connected devices.
•
Test relay operation (energize or de-energize).
•
Test front panel alarm LED operation (on or off).
•
Identify analyzer EPROM version.
•
Simulate a pH (or mV) or temperature signal to exercise
the measurement loop.
•
Reset configuration -- not calibration values to defaults.
•
Reset calibration -- not configuration values to defaults.
The system diagnostic capabilities of the analyzer enable
you to check the operating status of the analyzer, sensor
(measurement and temperature inputs), and relays. The
MEASURE screen will flash the “WARNING: CHECK STATUS”
message when a sensor or analyzer “FAIL” diagnostic con-
dition has been detected. To determine the condition
causing the warning, display the “STATUS” screens:
1.
Press
MENU key
to display a “MAIN MENU” screen.
If the
screen is not showing, use
Ø
Ø
or
×
×
key
to display it.
2.
Press
ENTER key
to display
.
3.
Press
ENTER key
again to display “STATUS: ANALYZER
OK” screen. This screen confirms that the analyzer is
operating properly. If “FAIL” appears, it may mean:
•
EPROM failure (data is not valid).
TEST/MAINTENANCE
