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109118-1 Rev. A,10/96
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3.4 Problem Solving (cont)
3.4.1 Meter Test and Reset (cont)
4. Press and all segments will display.
5. Press and the meter will return to normal operation.
6. Disconnect the electrode from the meter and install the
shorting clip in the electrode socket. If the meter is
operating properly it will display a stable pH value
between 6.98 and 7.02 ( or 0 ±1 mV in the millivolt mode).
If the meter passes the above test the problem is electrode
related. Refer to Section 3.4.3 for electrode troubleshooting.
If the meter fails the above test call the number on the back of
this manual for warranty and service information.
3.4.2 Meter Error Codes
Error codes are designed to give the user information on
electrode performance problems.
E1 Electrode is not reading a value close enough to the
first calibration buffer. Electrode needs maintenance.
E2 Electrode is not giving a value within 0.5 pH of the
second calibration buffer. Electrode needs
maintenance.
Measurement is out of range of the display. The meter
would display dashes if the electrode were not in a
solution, the pH of the solution is not between 0.00 and
14.00 or if the fill solution in the electrode is low or
wrong. Dashes in the temperature mode indicates that
the ATC has failed.
on/off
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