4 Top Blowdown
Page 82 Mk8 MM Expansion Features Installation and Set-Up Guide 04.09.2016
Figure 4.5.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.