YOKOGAWA FC400G User Manual

< 7. Calibration >
7-8
IM 12F5A1-01E
(7) Press the
YES
key to end the calibration and switch the FC400G to the MEAS mode.
Press the
YES
keytoswitchtheFC400Gtothe<MEASURE>or<HOLD>mode(“HOLD.
ON”inthemessagedisplay).When“HOLD.ON”isdisplayed,pressthe
NO
key to select the
<MEASURE> mode.
7.4 RemediesWhenErrorsOccurinZeroorSpan
Calibration
7.4.1 IfErrorsoccurduringCalibration
If error occurs during zero or span calibration, the FC400G free available chlorine analyzer displays
FAIL on the LCD and generates an error message as follows:
(1) DuringZeroCalibration
 “END.E6”:Zeropointerror(Err.6)
“END.E7” : Response error during the calibration (Err.7)
(2) During Span Calibration
“END.E5” : Slope error (Err.5)
“END.E7” : Response error during the calibration (Err.7)
Note : If multiple errors occur, the error with the highest priority appears.
PriorityisErr.5>Err.6>Err.7.
7.4.2 RemediesWhenanErrorOccurs
(1) Press the
NO
keytoperformcalibrationagainandconrmthattheerrordoesnotoccuragain.
(2) If the error occurs again, refer to Sec. 9.1 and remove the cause of the error, and then perform
calibration.
Note: When an error occurs, the concentration value based on the calibration data is displayed. Also, the error message and “FALL”
remain displayed in the <MEASURE> mode. These indications will not disappear unless the cause is removed.
NOTE
Slopeerror(Err.5)generatedwhenspancalibrationisperformedusingmanualanalysis
excepttheamperometrictitration(AT)method
Initial electrode sensitivity (set at the time of shipment) is established based on the AT method. When
span calibration is performed based on a manual analysis method (such as OT or DPD method)
otherthantheATmethod,aslopeerror[END.E5(Err.5)]mayoccurduetothedi󰀨erencebetween
the detecting sensitivity of the AT method and that of another method. In that case, initialize electrode
sensitivity and perform span calibration.
If no error occurs during manual analysis other than the AT method, there is no practical problem even
when the initial sensitivity set at the time of shipment is not changed.
Note: Toinitializetheelectrodesensitivity,setservicecode08to“1”for“initializeelectrodesensitivity”beforeperformingcalibration
[refer to Sec. 5.4.2(f)].

YOKOGAWA FC400G Specifications

General

Brand	YOKOGAWA
Model	FC400G
Category	Measuring Instruments
Language	English