35
CALIBRA
TION
EC process
calibration is a single point calibration performed while the probe remains installed in the
process. The value can be set ± 0.50 mS/cm around measured EC.
• Press CAL key to enter calibration mode. When the first standard solution value is displayed, press
one of the arrow keys to enter process calibration.
• Press the arrow keys again to adjust process calibration value to what was determined with the
reference measurement. “PROCESS” message is scrolled on the bottom of the LCD screen.
• Press CAL key to confirm the value (the “SAVE” message appears for a few seconds).
• Press MENU key to exit without saving and return to measurement mode. The “ESC” message is
displayed for a few seconds.
PROCESS TDS CALIBRATION
The probe may be calibrated in a TDS mode (ppm) prior to installation (in a standard) or it may also
be calibrated while installed in the process by adjusting the value to that of a calibrated reference
meter and probe.
• If calibrating in a beaker of standard, follow Preparation techniques in section 10.1 EC CALIBRATION.
• Follow the TDS process directions below to calibrate the probe and the controller.
• Wash with purified water before handling and installing into the control piping.
• Dispose of standard safely.
Verify probe is in a bubble -free solution or standard prior to calibration.
Note:
The Cal tag must be on and the meter in TDS mode prior to making this calibration.
• Press CAL key to enter calibration mode. Use one of the arrow keys to enter TDS process calibration.