Thermo orion 410Aplus, Instruction Manual

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Benchtop pH/ISE Meter Instruction Manual
Troubleshooting 69
B. Operator Assistance Codes
Operator Assistance Codes are used to inform the user of an out of range
value or meter problem. The following tables outline the operator
assistance codes available.
The meter has a self-test circuit that verifies proper electronic operation.
During self-test a special series of codes, E-1 through E-8 indicate a
problem with the meter hardware. See Table I. Should one of these codes
appear contact Thermo Orion’s Technical Service Department at
1-800-225-1480.
Table I Operator Assistance Codes
Self Test
Error Code
E-1 Segment Display Error
E-2 Ram Check Error
E-3 Input Channel 1 Error: Check to make sure the
shorting cap is securely in place on the input
connector and repeat self-test.
E-4 Input Channel 2 Error: Check to make sure the
shorting cap is securely attached and repeat the
self-test.
E-5 Internal Reference Error
E-6 Internal Ground Error
E-7 Keypad Error: Press each key one at a time while in
self-test. If code persists contact Thermo Orion’s
Technical Service Group.
E-8 Instrument Shutdown Error - for Models 520Aplus,
525Aplus, 720Aplus and 920Aplus only.
The Operator Assistance Codes E-20 through E-32 alert the user to a
potential problem while calibrating or measuring. Several steps can be
taken to eliminate the problem in each case. If the error code persists after
trying the suggested remedies, contact Thermo Orion’s Technical
Service Group.