Thermo Scientific Orion 320, User Manual

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4-11 Thermo Scientific Orion 320, 350 and 370 PerpHecT
®
LogR
®
Meter User Guide
The 350 PerpHecT meter features a built-in pH electrode test procedure
that will print out the complete documentation of the electrode results
when the following criteria are met:
Note:
The electrode test procedure is for pH electrodes only .
1 . For complete documentation of the GLPcheck, an external printer or
computer device must be connected via the RS232 interface .
2 . A three point pH calibration must be performed with pH 4 .01, pH
7 .00, and pH 10 .01 buffers . Refer to the Three Point Autocalibration
procedure .
3 . Upon successful completion of the three point calibration sequence,
gLP CAL g00d will appear on the meter display and the meter will
automatically send the documented results to the external device .
4 . The time, date, meter serial number (if entered), slope, average Eo, mV
and temperature of each buffer and Electrode Good will be printed .
5 . Unsuccessful pH calibrations will result in Service Electrode and
E-23 Bad Slope being printed . Clean the pH electrode as direct in the
pH electrode user guide, use fresh buffers and repeat the calibration
sequence . If problems persist, or refer to the Troubleshooting section
for troubleshooting procedures .
GLPcheck
™
Electrode
Diagnostic Procedure