3 x AAA
Set limit for
warning
Limit
Reset
meter
Flow rate
ON/OFF
Total litres treated
Select either
TDS/µS
Automatic quality monitor
Display:
Keys:
Limit warning signal
Operating the combined meter
Changing the batteries
The combined meter is battery-operated. It measures the flow rate in l/min, the total volume in litres and
the concentration of dissolved minerals, either in microsiemens or TDS. In addition, a limit can be set for the
maximum concentration of minerals tolerated in the demineralised water (appliance outlet). The limit and
overall total can both be reset.
Change the batteries when the battery warning symbol
appears or the display is faint or blank. Undo the 4 screws
on the front and carefully open the device. Change the bat-
teries. 3 x AAA.
Getting started:
Set the limit to 33 TDS/50 µS/cm.
Before and while filling the heating
system, press the ON key for indivdual
measurements every 5-10 litres (3).
A red LED warns if the cartridge is
spent (limit reached).
Insert a new cartridge and reset the
total litres (4).
Each time you touch this key, the boundary value is raised by 6/7 TDS or by 10 µS/cm. Holding down the key
for 3 seconds resets the boundary value to zero. Programming the boundary value serves as a warning as to
when the ion exchanger resin is exhausted.
This key can be used to switch at any time between the TDS unit of measurement (Total Dissolved Solids)
and electrical conductivity. Both are used to measure the concentration of dissolved minerals in the water.
Most European component manufacturers use the µS/cm unit of measurement (microsiemens).
The water hardness at the outlet of the refill appliance can be calculated using the following rule of thumb:
1 °fH equals approx. 20 µS/cm; 1 °dH equals approx. 35 µS/cm.
1
2
If the ON key is pressed once, the water quality is measured for 10 seconds and compared to the set limit.
The measured value is shown. If it is above the limit, the LED glows red; if it is below, the LED glows green
while the measurement is being taken. If required, the measurement can be repeated manually.
Auto mode:
If the ON key is pressed for a second time, the combined meter begins automatic monitoring.
The eye symbol appears to indicate that monitoring has been enabled. In auto mode, the meter only takes
measurements when water is actually passing over it. If the water draw-off is interrupted, the meter
continues to show the last captured value. While water is being drawn off, the combined meter measures
the water quality every 10 litres. If the limit is exceeded in two successive measurements, the display
continuously flashes red. This indicates that the ion exchange resin is spent and needs replacing. If the ON
key is pressed for a third time, the meter exits auto mode.
3
Pressing the reset key for 3 seconds resets the overall total on the meter. This is recommended every time
the resin is replaced, as it gives a reference point for the remaining capacity of the ion exchange resin.
4
3 EN
