PART THREE - OPERATION
SECTION 6 - TEST/MAINTENANCE
Model P53 pH/ORP Analyzer (universal-mount 1/2 DIN)
Rev. 6-501
72
•
EPROM failure (data is not valid).
•
Scaling card not present or not recognized.
•
Analog-to-digital converter not responding.
•
RAM failure.
•
Internal serial communications failure.
4.
Press
ENTER key
again to view the “STATUS:
SENSOR OK” screen. If FAIL appears, it indicates that
the sensor is inoperative or its signal is out of range (for
pH, more than +480 mV or less than -480 mV; for ORP,
more than +2100 mV or less than -2100 mV).
5.
Press
ENTER key
again to view the “STATUS: TEMP
OK” screen. If FAIL appears, it indicates that the
temperature element in the sensor (or an external ele-
ment) is inoperative, disconnected or incorrectly wired.
6.
With the “STATUS: TEMP OK” screen displayed, press
ENTER key
once to view the “STATUS: RLY A” screen.
Subsequent
ENTER key
presses display status screens
for Relay B, C, and D. Status indications can be:
Status Indication
Meaning
ACTIVE
(Relay energized;
annunciator is on.)
Control Relay: Measured value exceeds setpoint.
Alarm Relay: Measured value exceeds low or
high alarm point.
Status Relay: Existing system diagnostic
condition has been detected.
INACTIVE
(Relay not energized;
annunciator is off.)
Control Relay: Measured value does not
exceed setpoint.
Alarm Relay: Measured value does not exceed
low or high alarm point.
Status Relay: Analyzer has not detected system
diagnostic condition.
TIMEOUT
(Relay not energized;
annunciator blinks.)
Control Relay: Overfeed timer has timed out;
manually reset it.
NOTE:
TIMEOUT only applies to control relays.
COUNTING
(Relay energized;
annunciator is on.)
Control Relay: Overfeed timer is counting, but
has not timed out.
NOTE:
COUNTING only applies to control relays.
TIME ON
(Relay energized;
annunciator is on.)
Timer Relay: Timer relay is on and counting down
duration time before turning off.
NOTE:
TIME ON only applies to timer relays.
TIME OFF
(Relay not energized;
annunciator is off.)
Timer Relay: Timer relay is off and counting down
interval time before turning on.
NOTE:
TIME OFF only applies to timer relays.
7.
To end status checking, press
ESC key
or
ENTER key
(display returns to TEST/MAINT top-level menu screen).
