OHAUS a-AB33EC, Instruction Manual

Page: 39 / 152

Analyzer and Bench Meter EN-37
11. Maintenance
11.1 Error message
a-AB33PH, a-AB41PH and a-AB33M1 models:
Table 11-1 Error message
Error Code Possible Cause Possible Solution
Error 3
Measured buffer
temperature out of range
(<0 °C or >50 °C)
Keep the pH buffer temperature within
the range for calibration.
Error 4
Offset out of range
offset > 60mV or < - 60
mV

Make sure the pH buffer is correct
and fresh.

Clean or replace the pH electrode.
Error 5 Slope out of range

Make sure the buffer is correct
and fresh.

Clean or replace the pH electrode.
Error 6
Meter cannot recognize
the buffer
 Make sure the buffer is correct
and fresh.
 Check if the buffer has not been
used more than once.
Error 7
(a-AB33M1)
Cell K value out of range

Make sure the Cell K value set in
the menu is in compliance with
the cell K value of the electrode
you use.

The electrode may be broken or
expired, so replace the electrode.
a-AB33EC model:
Table 11-2 Error message
Error Code Possible Cause Possible Solution
Error 3
Measured standard
temperature out of range
(<0 °C or >35 °C)
Keep the standard temperature within
the range for calibration
Error 7 Cell K value out of range

Make sure the Cell K value set in
the menu is in compliance with
the cell K value of the electrode
you use.

The electrode may be broken or
expired, so replace the electrode.
Note
: If an error happens, the meter will
beep 2 times
to alert.
If the troubleshooting section does not resolve your problem, contact an OHAUS technical
support agent. For assistance in the United States, call toll-free 1-800-526-0659 between
8:00 AM and 5:00 PM Eastern Standard Time. An OHAUS Technical Support Specialist
will be available to assist you. Outside the USA, please visit our website www.ohaus.com
to locate the OHAUS office nearest you.