53
Menu Display
Maintenance
Opening the Maintenance menu
From the measuring mode:
Press
menu
key to select menu.
Select maintenance using arrow keys,
confirm with
enter
.
Passcode 2958 (To change passcode:
Parameter setting/System control/
Passcode entry).
Then select “Module OXY”.
Temp probe adjustment
This function allows compensating
for the individual temperature probe
tolerance and the influence of the
lead resistances to increase the accu-
racy of temperature measurement.
Make sure that the process tempera-
ture is precisely measured using a
calibrated reference thermometer
when performing an adjustment! The
measurement error of the reference
thermometer should be less than
0.1 °C. Adjustment without precise
measurement might result in consid-
erable deviations of the measured
value display!
Sensor monitor
During maintenance, the sensor mon-
itor allows validation of the sensor
by immersing it in a known solution,
for example, and checking the values
measured.
Sensor monitor
Return
25.6°C
80.7%Air
Sensor current
Sensor current (25°C)
Air pressure
RTD
Temperature
-60.2 nA
-58.5 nA
1014 mbar
22.0 kΩ
25.1 °C
Temp probe adjustment
Probe tolerance and lead adjustment
Enter measured process temp
25.6°C
16.4%Air
Installation adjustment
Abort
Off
Process temperature
On
+
0
25.0°C
OK
Menu selection
Return to meas
25.6°C
Select:
[enter]
Lingua
80.7%Air
Maintenance
Sensor monitor, temp probe adjustment
Note:
Function check (HOLD) mode active
Ext. pressure transmitter 0 mbar
N
ot
e:
T
he displa
y ma
y v
ar
y depending on the devic
e v
ersion.
1) With Protos II 4400(X) in the Calibration menu
1)