18 Operation
Mk8 MM Manual Page | 341
Figure 18.13.ii Calibrate TDS Probe
To calibrate the probe, press to calibrate the TDS probe. After taking a manual sample of the TDS,
enter the value into the keypad and press to enter this value. This value must be within 10% - 990% of
the probe reading to avoid incorrect calibration. If there is an air lock, the TDS probe will not be calibrated as
the reading will be 0ppm. To check the manual sample value against the now calibrated probe value, press
to sample the TDS using the probe.
Note: Top blowdown control does not operate when the TDS probe is being calibrated, when a fresh sample
is taken or when the burner is not firing.