128
Product Calibration (Calibration with Sampling)
When the electrode cannot be removed – e.g. for sterility reasons – its zero
point can be determined with “sampling”. To do so, the currently measured pro-
cess value is stored by the Protos. Immediately afterwards, you take a sample
from the process. The pH value of the sample is measured in the lab or directly
on the site using a portable pH meter. The reference value is entered into the
measuring system. From the difference between measured value and reference
value, the Protos calculates the electrode zero point (this method only allows
one-point calibration).
During calibration the module is in HOLD mode. Current outputs and relay
contacts of the module behave as configured (BASE module).
Caution! The pH value of the sample is temperature-dependent. Therefore,
the reference measurement should be performed at the sample temperature
shown in the display. Transport the sample in an insulated container. The pH
value may also be altered due to escaping of volatile substances.
Menu Display
Product calibration
Select module: PHU 3400-110
The module is in HOLD mode. The
assigned current outputs and relay
contacts behave as configured (BASE).
Confirm with enter.
Select calibration mode
“Product calibration”
Confirm with enter.
Calibration
25.6 °C
Return
Info
7.00 pH
Module PHU 3400-110
Module PHU 3400-110
25.6 °C
Return
Manual: entry of buffer values
7.00 pH
Calimatic: automatic calibration
Product calibration
ORP calibration
Data entry: premeasured electrodes
Calibration / Adjustment
Product Calibration
Product calibration
Summary of Contents for Protos 3400
Page 12: ...12 ...
Page 160: ...160 ...
Page 177: ...177 Appendix Buffer Table Mettler Toledo ...
Page 179: ...179 Appendix Buffer Table DIN 19267 ...
Page 181: ...181 Appendix Buffer Table Techn Buffers to NIST ...
Page 182: ...182 Appendix Buffer Table Hamilton ...
Page 183: ...183 Appendix Buffer Table Kraft ...
Page 184: ...184 Appendix Buffer Table Hamilton A ...
Page 185: ...185 Appendix Buffer Table Hamilton B ...
Page 186: ...186 Appendix Buffer Table HACH ...
Page 206: ...206 Index ...
Page 207: ...207 Index ...