11 Top Blowdown
Mk8 MM Manual Page | 219
Figure 11.8B - Calibrate TDS Probe
After taking and analysing a manual sample of the TDS, in order to calibrate the TDS probe, press
, enter the value using the on-screen keypad and press to enter the TDS 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.