Endress+Hauser Topcal S CPC310, Operating Instructions Manual

Page: 81 / 176

Commissioning
81
PCS alarm (Process Check System)
The measuring signal is examined for deviations with the PCS. An alarm is triggered (E152) if the
change in the measuring signal is smaller than 0.5% (of the full scale value of the selected measuring
range) within the time entered. The reason for such sensor behavior can be fouling, cable rupture
or similar.
a0004338
Fig. 57: PCS alarm (Live Check)
A Constant measuring signal = Alarm is triggered once the PCS alarm time elapses
!
Note!
• The electrode must be connected symmetrically (with PML) to monitor the reference.
• A PCS alarm pending is cleared automatically once the sensor signal changes.
• Due to its semiconductor component, the ISFET sensor is sensitive to light and reacts with
fluctuations in the measured value. Therefore, avoid direct sunlight during calibration and
operation. Normal ambient light does not affect measurement.
Check menu
To call the menu, select:
"
Ñ
> Specialist > Set up 2 > Check"
A
t
Function Options Info
SCS (Sensor Check System) Activation and subsequent entry
• Glass sensor
– On
– Off
• Ref. sensor
– Off
– light
– medium
– Heavy
– Very heavy
Factory setting
Glass sensor 1: Off
Ref. sensor 1: Off
Select the check mode.
Glass sensor: Glass breakage detection
Ref. sensor: Blockage detection
PCS (Process Check System) Activation and subsequent entry
• PCS
– Off
– 1h
– 2h
– 4h
Factory setting
Off
An alarm occurs with error message E152 if the
measuring signal does not change by ±0.02 pH
/ ±5mV / ±0.25% over the time entered.
!
Note!
A PCS alarm signal pending is cleared
automatically once the sensor signal changes.
Hold
pH 7. 00
Param
[E]
Sensor check
Next Select
Glass sensor 1
Ref sensor 1
off
[ ¯®]
off