Metrohm 726 Titroprocessor - Manual (Page 251)

12 12. . Troubleshooting Troubleshooting
726 Titroprocessor, Instructions for use 245 245
MEAS/CAL
MEAS/CAL 1: cycle time too short
The selected measuring interval is shorter than the waiting time of the drift-
controlled individual measurements. This can lead to irregular cycle times
for the series of measurements. If necessary correct the waiting time or
switch off the measurement drift control.
MEAS/CAL 2: measured value out of buffer tolerance
The measured value of the buffer solution does not correspond with the
nominal buffer value. Check the sensor and buffer solution.
MEAS/CAL 3: same buffer (?)
The same buffer value has been found twice in succession. The buffer solu-
tion has probably not been changed.
MEAS/CAL 4: buffer temperature out of tolerance
For a correct calibration all buffer solutions in a series must have approxi-
mately similar temperatures. A temperature has been found which is outside
the tolerated scatter range of 2°C.
MEAS/CAL 5: invalid measuring value
An invalid measuring value has been found. Check the sensor.
MEAS/CAL 6: irregular calibration, save anyway?
A fault has occurred during the measurement of a buffer solution. Press
to accept the buffer value anyway, or to interrupt the calibration.
MEAS/CAL 7: irregular calibration, buffer will be ignored
A fault which cannot be more closely specified has occurred during the
measurement of a buffer solution. The buffer will be ignored for the calibra-
tion.
MEAS.INP.
MEAS.INP. 1: meas.input 'X' busy, press [Start / Stop]
It is not possible to alter the measuring mode while a measurement is taking
place. The measurement should first be stopped.
MEAS.INP. 2: meas.input 'X' already locked
A manual measurement cannot be made if the selected measuring input or
sensor is occupied with a running method.
MEAS.INP. 3: meas.input 'X' not found
The selected measuring input is not built into the instrument.