Mettler Toledo SevenGo Duo pro SG78 Instrucciones De Manejo página 35

Message
pH/mV/ion/tem per a ture/con duc tiv i ty/
TDS/salin i ty/ resistivity below min. lim it
Memory is full
Please calibrate electrode
Active sensor cannot be deleted
Wrong buffer
Slope out of range
Offset out of range
Buffer temp. out of range
Standard temp. out of range
Temperature differs from setting
ISM sensor communication error
®
Self-test failure
Wrong settings
pH/ORP/Ion/Conductivity meter SG78
Description and Resolution
●
Check sample temperature.
●
Make sure that the pH electrode wetting cap has been re-
moved and that the electrode is properly connected and
placed in the sample solution.
Max. 500 measurement data can be stored in the memory.
●
Delete all or partial data in the memory, otherwise you
will not be able to store new measurement data.
Calibration reminder has been switched on in the menu set-
tings and last calibration has expired.
●
Calibrate the electrode.
Deleting the calibration data of the selected sensor ID is not
pos si ble, because it is currently the active sensor ID in the
meter shown on the display.
●
Enter new sensor ID in the menu settings.
●
Select another sensor ID from the list in the menu set-
tings.
Meter cannot recognize the buffer or standard/buffer has been
used twice for calibration/two buffers differ less than 60 mV.
●
Make sure that you have the correct buffer and that it is
fresh.
●
Make sure that the buffer has not been used more than
once during the calibration.
The calibration result is outside the following limits: Slope <
85% or > 105%, Offset < -35 mV or > + 35 mV.
●
Make sure that you have the correct buffer and that it is
fresh.
●
Check mV signal of electrode, clean or replace the elec-
trode.
The ATC measured temperature is out of pH calibration buf-
fer range: 5 ... 50 °C or out of conductivity calibration range:
0...35°C.
●
Keep the buffer/standard temperature within the range.
●
Change the temperature setting.
ATC measured temperature differs by more than 0.5°C from
the user-defined value/temperature range.
●
Keep the buffer/standard temperature within the range.
●
Change the temperature setting.
Data has not been transferred correctly between ISM
and meter. Reconnect the ISM
Self-test has not been completed within 2 minutes or meter is
defec tive.
●
Restart self-test and finish within 2 minutes.
●
Contact METTLER TOLEDO service if problem persists.
Entered value differs by less than 1 pH unit/5°C from other
pre set values.
●
Enter a higher/lower value in order to get a bigger dif fer-
ence.
Maintenance
sensor
®
sensor and try again.
®
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