Calibration Error Messages - Signet 9900 Operating Instructions Manual

Calibration Error Messages

Message
Out Of Range Use Manual
Calibration
Err Too Large To Calibrate
Error Volume Too Low
Error New KF Out Of Range
Error Flow Rate Too Low
Cal Error Out Of Range
Slope Too Close To Standard
Standard Too Close To Slope
Level Offset Too Large
Pressure Too High
Pressure Too Close To Zero
Check Cal
(2751 pH/ORP only)
62 9900 Transmitter
Cause
Cond/Res
( ) Error > 10% in AutoCal
(pH) Buffer not found;
Error > ±1.5 pH units
(ORP) No quinhydrone in buffer
Error greater than ±80 mV
Cond/Res
( ) Manual cal when error >
100%
(pH) Offset > 1.3 pH units;
Slope error > 100%
(Press) Slope must be < ±50% or offset
must be < 2.75 PSI or equivalent.
(Sal) Slope error > 1000%
User-entered volume too small to
calibrate
The calculated K-Factor too low or high
(Rate Cal) Flow too low to accurately
calibrate
(4 to 20 mA) Slope error > 1000%
(Temp) Offset must be < ±20 °C or
equivalent.
(4 to 20 mA) Difference in calibration
values must be > 0.1 units
(pH) Difference in calibration values
must be > 2 pH units
(ORP) Difference in calibration values
must be > 30 mV
(4 to 20 mA) Difference in calibration
values must be > 0.1 units
(pH) Difference in calibration values
must be > 2 pH units
(ORP) Difference in calibration values
must be > 30 mV
Offset must be < 1.0 meter
Pressure must be lower than 2.5 PSI
or equivalent to do zero cal.
Pressure must be higher than 3 PSI or
equivalent to do slope calibration.
Slope and/or Offset are out of range
(possibly due to memory failure in
sensor or preamp)
Solution
Use manual calibration method
Use 4, 7, 10 pH buffers (with quinhydrone for
ORP calibration)
Clean sensor and retry EasyCal
Use manual calibration method
Inspect sensor and wiring for damage
Clean sensor
Check reference
Clean sensor
Replace sensor
Correct volume entry
Use longer calibration period
Verify volume or rate entered
Verify fl ow is present
Increase fl ow
Check input at 4 mA and 20 mA settings
Check sensor range
Check reference
Replace sensor
Check sensor
Use fresh buffer
Use two different buffer values
Clean sensor
Clean sensor
Use fresh 4, 7, 10 pH buffers
Use two different buffer values
Decrease offset
Replace sensor
Decrease pressure
Increase pressure
Check reference
Perform pH EasyCal (pg. 34 & 56)
Perform ORP EasyCal (pg. 36 & 58)
Set pH Slope or Standard (pg. 34 & 57)
Set ORP Slope or Standard (pg. 36 & 59)
Reset pH CAL (pg. 34)
Reset ORP CAL (pg. 36)