214
WT.050.590.000.DE.IM.0719
Operation
SFC
6.
Calibration?
In 3-electrode cells and membrane
sensors
Slope error - the sensor current
based on 1 mg/l has fallen below the
required minimum
In measuring range:
10µ : min. 0.04 µA/mg/l
70 µA: min. 0.2 µA/mg/l
100 µA: min. 0.4 µA/mg/l
200 µA: min. 2 µA/mg/l
1000 µA: min. 4 µA/mg/l
Check whether there are air bubbles on
the membrane sensor and remove, if
necessary
Service membrane sensors - replace
electrolyte/membrane cap
Clean 3-electrode cells, replace cell
sand
With pH
with pH 7 calibration, the
sensor signal is outside
-100 – +100 mV or the sensor
delivers a signal outside 46 – 70 mV
per pH step
the distance of the calibration point
is less than 1 pH step
Checks electrode,
Check buffer solution,
Replace if necessary
With mV
the correction offset of the mV
electrode is outside -50 – +50 mV
Check electrodes,
Check buffer solution,
Replace if necessary
Conductivity
measurement spread is smaller
than 0.8 or larger than 1.2
Clean sensor,
check,
change sensor if necessary
Fluoride
The rate of change of the sensor
curve is too small or the calibration
limits have been exceeded
0,2 mg/l: 40 – 160 mV
2.0 mg/l: -10 – 100 mV
20 mg/l: -60 – 40 mV
The lower cal. value sensor voltage
must be 20 mV higher than the
upper cal. value
Check electrode, cable and standard
solution, use fresh standard solution,
replace electrodes
mA output?
Load error
The mA output cannot drive its mA
output current through the
connected current loop (500 Ohm at
20 mA max.).
Check whether the mA signal is
required at all (e.g. for plotter). If not, in
the "INPUTS/OUTPUTS" menu,
„analog output“, switch off the output
signal.
Check the mA signal cable for
interruption
Temperature ?
Interruption in the
temperaturesensor or multi-sensor
cable
Check multi-sensor and cable
Error message
Cause
Remedy
Summary of Contents for WALLACE & TIERNAN SFC
Page 1: ...WALLACE TIERNAN MEASURING AND CONTROL SYSTEM SFC from version V 3 08 INSTRUCTION MANUAL...
Page 2: ...2 WT 050 590 000 DE IM 0719 SFC Please note Original instruction manual...
Page 40: ...40 WT 050 590 000 DE IM 0719 Description SFC 3...
Page 118: ...118 WT 050 590 000 DE IM 0719 Functions SFC 4...
Page 121: ...SFC Installation 5 121 Top hat rail assembly...
Page 122: ...122 WT 050 590 000 DE IM 0719 Installation SFC 5 Wall mounting assembly...
Page 123: ...SFC Installation 5 123 Top hat rail assembly...
Page 124: ...124 WT 050 590 000 DE IM 0719 Installation SFC 5 Wall mounting assembly...
Page 125: ...SFC Installation 5 125 Control cabinet installation assembly...
Page 126: ...126 WT 050 590 000 DE IM 0719 Installation SFC 5 Control cabinet installation assembly...
Page 127: ...SFC Installation 5 127 Installation of the front panel on the control cabinet...
Page 156: ...156 WT 050 590 000 DE IM 0719 Installation SFC 5...
Page 218: ...218 WT 050 590 000 DE IM 0719 Operation SFC 6...
Page 232: ...232 WT 050 590 000 DE IM 0719 Maintenance SFC 7...
Page 266: ...266 WT 050 590 000 DE IM 0719 Complete Units Retrofit Kits and Spare Parts SFC 8...
Page 274: ...274 WT 050 590 000 DE IM 0719 Declarations and certificates SFC 10...
Page 275: ...SFC Declarations and certificates 10 275 10 2 Certificate of Compliance...
Page 276: ...276 WT 050 590 000 DE IM 0719 Declarations and certificates SFC 10...
Page 284: ...284 WT 050 590 000 DE IM 0719 Settings Table SFC 11...