10 Configuration
146
10.5.5 Calibration timer
Open Calibration Timer Settings Analysis Inputs pH/Redox/NH3:
Device Menu > Configuration > Analog Inputs >
Analysis Input 1 to 4 > Calibration Timer
Calibration timers prompt the user to calibrate sensors on a regular basis. The
settings for all analysis inputs and the universal inputs are explained together.
⇨ Chapter 10.12 "Calibration timer", page 174
Glass electrode
monitoring
off
minimum impedance
maximum impedance
min./max. impedance
configurable monitoring of pH glass electrodes
without impedance converter
minimum impedance: monitoring for soft short/
sensor failure
maximum impedance: monitoring for aging/pol-
lution/wire break
Reference
electrode monitoring
On
Off
Activation of reference electrode impedance
monitoring
A high-impedance symmetrical connection is re-
quired.
max.
reference impedance
0to100kΩ upper impedance limit for monitoring a reference
electrode
Alarm/Event list off
event
alarm
Assignment of sensor failure notification to alarm
list or event list
Sensor alarm
delay
0 to 999 s The sensor alarm is suppressed for the set dura-
tion of the alarm delay.
Text sensor alarm up to 21 text characters Text for the alarm/event list in case of sensor er-
ror
Alarms 1/2 Analog input alarms are used to monitor measured values
in relation to adjustable limit values.
The alarm settings for all analog device functions are explained together.
⇨ Chapter 10.11.2 "Alarms for analog signals and digital sensors", page
170
Calibration timer Calibration timers prompt the user to calibrate sensors on a regular basis.
The settings for all analysis inputs and the universal inputs are explained to-
gether.
⇨ Chapter 10.12 "Calibration timer", page 174
a
The entry field units depend on the configuration items "Electrode type" and
"Redox unit".
Configuration point Selection/
setting option
Explanation
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