78
APT4000PH
Display
Action Remark
Enter measured temperature
value.
Select with key,
edit number with key,
proceed with ENTER
End adjustment with ENTER.
Hold will be deactivated after
20 sec.
Temperature probe adjustment
Activate calibration
(Press CAL,
enter 1015)
Select with key,
edit number with key,
proceed with ENTER
Measure the temperature of the
process medium using an external
thermometer
Wrong settings change
the measurement
properties! If an invalid
code is entered, the
APT4000PH returns to
measuring mode.
Default:
Current value of sec-
ondary display.
APT4000PH is in Hold
mode.
Display
Remark
Measurement
In the measuring mode the main display shows the config-
ured process variable (pH or ORP [mV]),
the secondary display shows the temperature.
During calibration you can return to measuring mode by
pressing the CAL, during configuration by pressing CONF.
(Waiting time for measured value stabilization approx.
20 sec).
79
Display of output currents
Press ENTER while in measuring mode.
The current at output 1 is shown in the main display, the
current at output 2 in the secondary display.
After 5 sec the APT4000PH returns to measuring mode.
Diagnostics functions
Display
Remark
Display of calibration data (Cal Info)
Press CAL while in measuring mode and enter code 0000.
The slope is shown in the main display, the asymmetry
potential in the secondary display.
After 20 sec the APT4000PH returns to measuring mode
(immediate return at pressing CAL).
Display of electrode potential
(Sensor monitor)
Press CONF while in measuring mode and enter code
2222. The (uncompensated) electrode potential is shown in
the main display, the measuring temperature in the sec-
ondary display.
Press ENTER to return to measurement.
Display of last error message
(Error Info)
Press CONF while in measuring mode and enter
code 0000. The last error message is displayed for
approx. 20 sec.
After that the message will be deleted.
(immediate return to measurement at pressing ENTER).
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