3.1. ON/OFF remote control
3.2. Remote control of the dosing pump
3.3. PC control

3.1 ON/OFF remote control

By interlinking the contacts no. 4 and 5 of the socket at the rear of the pump (see figure 6-1 and section 6.2), the powder dosing instrument will be blocked and the ON/OFF LED is switched OFF.

The same effect will be obtained by applying a voltage of 3 to 12 V DC to the contact no. 5 (0 line must be connected to contact no. 3). The remote control cable (Art. no. 4810) is used for the transmission of the remote control signals.

Remark: In some cases, a reversed logic for the remote control might be desired. In such cases, please contact us (support@lambda-instruments.com).


3.2 Remote control of the dosing pump

The LAMBDA DOSER and HI-DOSER can be controlled over the whole speed range by an external signal (0 - 10 V DC, option 0-20 or 4-20 mA). The plus pole of the signal is connected to the contact no.1, 0 line to the contact no.3.

Press the button REMOTE on the front panel. The corresponding LED diode will go ON and the display will indicate the approximate voltage of the external signal. This indication may become unstable when no external connection is made and indicates the high sensitivity of the electronics.


For safety reasons the voltage of the external signal must not exceed 48 V to earth!


3.3 PC control

If the instrument has been equipped with the optional RS-232 or RS-485 interface, it can be controlled digitally, e.g. from a PC by PNet control software.

To look up/modify the instrument address; disconnect the DOSER or HI-DOSER from mains.

Press the ADRS button continuously and at the same time connect the DOSER or HI-DOSER to the mains again.

The message “A” and two numbers will appear on the display. This number from 00 to 99 is the current address of the powder dosing instrument.

To change the address, press the buttons Λ Λ Λ under the display until the desired number is obtained.

To confirm and save the address, press the ON/OFF button.