Advanced Ph Electrode Diagnostics Using Logr Technology - Thermo Scientific Orion Versa Star Pro User Manual


Appendix A Channel Specific Settings and Features

136 Orion Versa Star Pro Meter User Manual
Table 2 – Three Point LogR Temperature Calibration, Average Error at pH 3 and pH 11
Average Temp.
Error
Electrode
0 to 25 °C
(°C)
8202BN 0.04
8203BN 0.04
8235BN 0.07
8256BN 0.04
8272BN 0.02
9202BN 0.03
9203BN 0.06
9206BN 0.02
9207BN 0.07
9256BN 0.02
9272BN 0.22
* For 20 °C temperature compensation spans
Active Replacement Electrode for Electrodes Listed in Table 1 and Table 2
Obsolete Electrode Available Replacement
8202BN 8102BNUWP, 8102BN
8203BN 8103BNUWP, 8103BN
8235BN 8135BNUWP, 8135BN
8256BN 8156BNUWP, 815600
8272BN

Advanced pH Electrode Diagnostics using LogR Technology

Electrode Troubleshooting Using LogR Technology
Many factors affect the performance of your pH combination electrode. While the majority of
problems seen in electrode performance relate to reference issues, changes over time in the
sensing glass can negatively affect performance. These effects can be monitored using a Versa
Star Pro meter with pH/LogR measurement module. This can save time by helping to identify
cases where cleaning and maintenance will not be able to rejuvenate the pH electrode.
Viewing Electrode Resistance
The pH electrode bulb resistance value can be viewed on the measurement screen when LogR
is selected for the temperature source. For detailed information on selecting and calibrating
LogR temperature, refer to the
Average Temp. Average Temperature
Error Compensation Error
Above 20 °C *
(°C)
0.03
0.01
0.06
0.06
0.01
0.06
0.05
0.02
0.07
0.00
0.06
Obsolete Electrode Available Replacement
9202BN
9203BN
9206BN
9256BN
8172BNWP 9272BN
LogR Temperature Calibration
Average Temperature
Compensation Error
0 to 25 ºC Above 20 °C *
(pH Units)
0.000
0.000
0.001
0.000
0.000
0.000
0.001
0.000
0.001
0.001
0.003
9102BNWP
9103BNWP
9106BNWP
9156BNWP
9172BNWP
section of this user manual.
(°C)
0.000
0.000
0.001
0.001
0.000
0.001
0.001
0.000
0.001
0.000
0.001
Thermo Scientific