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79
GF 9950-10 Six Channel Transmitter
Message
Cause
Solution
Out Of Range Use Manual
Calibration
(
Cond/Res
) Error > 10% in AutoCal
Use manual calibration method
(pH) Buffer not found;
Error > ±1.5 pH units
• Use 4, & 7 pH buffers (with quinhydrone
for ORP calibration) or Light's Solution
• Clean sensor and retry EasyCal
• Use manual calibration method
(ORP) No quinhydrone in buffer
Error greater than ±80 mV
Err Too Large To Calibrate
(
Cond/Res
) Manual Cal when error > 100%
• Inspect sensor and wiring for damage
• Clean sensor
(pH) Offset > 1.3 pH units;
Slope error > 100%
• Check reference
• Clean sensor
• Replace sensor
(Press) Slope must be < ±50% or offset
must be < 2.75 PSI or equivalent
Error Volume Too Low
User-entered volume too small to calibrate
• Correct volume entry
• Use longer calibration period
Error New KF Out Of Range The calculated K-Factor too low or high
• Verify volume or rate entered
• Verify
fl
ow is present
Error Flow Rate Too Low
(Rate Cal) Flow too low to accurately
calibrate
Increase
fl
ow
Cal Error Out Of Range
(4 to 20 mA) Slope error > 100
Check input at 4 mA and 20 mA settings
(Temp) Offset must be < ±20 °C or
equivalent
• Check sensor range
• Check reference
• Replace sensor
Slope Too Close To
Standard
(4 to 20 mA) Difference in calibration values
must be > 0.1 units
• Check sensor
• Use fresh buffer
• Use two different buffer values
• Clean sensor
(pH) Difference in calibration values must
be > 2 pH units
(ORP) Difference in calibration values must
be > 30 mV
Standard Too Close To
Slope
(4 to 20 mA) Difference in calibration values
must be > 0.1 units
• Clean sensor
• Use fresh 4, 7, 10 pH buffers
• Use two different buffer values
(pH) Difference in calibration values must
be > 2 pH units
(ORP) Difference in calibration values must
be > 30 mV
Level Offset Too Large
Offset must be < 1.0 meter
• Decrease offset
• Replace sensor
Pressure Too High
Pressure must be lower than 2.5 PSI or
equivalent to do zero cal
Decrease pressure
Pressure Too Close To Zero Pressure must be higher than 3 PSI or
equivalent to do slope calibration
• Increase pressure
• Check reference
Value too High
(Salinity)
Salinity value outside of measurement
valid range 0 to 42 PPT
• Verify application range does not exceed
42 ppt
• Remove, clean and calibrate sensor
• Verify correct cell constant was selected
Value too Low
(Salinity)
Temperature value outside of
measurement valid range and -2 to 35 C°
Calibration Error Messages