Aqua Medic LF 2001 C Installation manual

Operation manual
Conductivity Controller
LF 2001 C
Digital Conductivity Controller
With the purchase of this digital conductivity controller, you have decided to work with
a quality instrument.It has been especially been developed for aquarium use and has
been tested by professionals.
With this unit, you can measure and control the conductivity of your aquarium water,
as a parameter of the salt content, continously.

1. Theory 2
1. Theory:
The electrical resistance depends on the salt content of the water. Destilled water
conducts the electrical current not, salt water however very good. The measurement of
the electrical resistence can be used as a parameter for the salt content of the water - if
the composition is known. The conductivity is determined as µS, or mS ( Mikro- or
Millisiemens). Typical conductivity values are:
Destilled water > 30 µS
fresh water 100 - 1.500 µS
sea water 45 -49 mS
2. Delivery:
The conductivitycontroller LF 2001 C is supplied with a conductivity
probe and ready to use. To controll, it is possible to connect an electrical instrument (
pump, solenoid valve) at the socket of the main plug.
Description of the front panel:
1. Display
2. Display, relay on/off
3. set/measuring switch
4. measuring range
switch
5. set point adjustion
6. Calibration mS
7. Calibration µS
8. Electrode, fix
connected
9. 220V-plug/ socket
for pump/solenoid

3. Starting/ measuring 3
3. Starting/measuring
1. connect the main plug to 220 V, if not indicated otherwise
2. turn switch (3) on M" (measuring)
3. immerse the top of the conductivity probe into the test liquid, minimum depth 4 cm
4. switch the measuring range switch to the right range ( µS for pure and fresh water,
mS for brackish and sea water, recalibrate , if necessary)
5. After 3 min you can read the value.
3. Controlling
1. switch knob 3 ( set/measuring) to „set“
Adjust the desired set point at knob 5 ( set point adjustion).
2. Turn switch 3 back to „µS“. The unit is now ready to use. As soon as the adjusted set
point is exceeded, the unit activates the socket at the main plug.
4. Calibration.
If you change the measuring range between fresh and sea water, the unit has to be
recalibrated.
1. For freshwater, a calibration solution of 250 µS, and for seawater a solution of 35 mS
is recommended.
-immerse the electrode in a calibration liquid of the corresponding range and the
exact temperature. To adjust the display, turn the calibration knob ( 6 or 7) of the
corresponding range.
2. For freshwater a calibration second fluid with 500 µS/cm, for seawater with 50 mS/cm
is necassary.
-Turn a small screw driver through the opening at the bottom of the unit, until the
display shows the right value.
If the unit shows a wrong value, it has to be recalibrated.
5. Electrode
The conductivity electrode has a plactic shaft. The contact pins are made from carbon
and are coorsion safe, also in sea water in long term use. The electrode is supplied with a
thermosensor for automatic temperature compensation. The electrode is maintenance
free.

technical data 4
technical Data
display: 0.5 " LED, 3-1/2 digits
measuring range: 0 - 1.999 µS
0 - 199,9 mS
resolution : 1 µS ( 0 - 1999 µS)
0,1 mS ( 0 - 199,9 mS)
accuracy: +/- 1% (+2 digits)
max. power on relay: 5 Amp. at 240 V (1000 W)
working temperature: 0-50 °C
temperaturecompensation 0 - 50 °, automatic
humidity : below 80%
control range : 0 - 199 mS,digitally adjustable
control accuracy: +/- 5 µS, +/- 0,5 mS(+1digit)
power supply: 220V, 50 Hz
dimensio ns: 150 x 85 x 40 mm
weight: 550 g
5. Warranty
GmbH gives a warranty of 6 month. The Date is prooved by the
invoice of the retail shop.