Turbine flowmeter Wiring​

 Turbine flowmeter Wiring

1 For technical parameter and connection terminal diagram for Type LWF-P-1 

pulse output pre-amplifier, see Figure 8-1.

（1）Through thread M14*1, Type LWF-P-1 pre-amplifier is screwed into installation 

thread holes on the body of the turbine flow meter, and then is locked with locknuts.It 

is a kind of small-sized amplifier of low driving power, suitable for application in association 

with normal display instruments.

The output signals are delivered by the connector plugs through 3-wire shielded cable, 

with metal shielded network grounded. The connection is as per Figure 8-1.

 ● a. Connection terminal diagram  ●b. Connection Terminal Diagram for Connecting

 for Aviation Connector Plugs Terminals

Figure 8-1 Connection Terminal Diagram of Type LWF－P Pre-Amplifier

0 Power supply source: VDD is the nominal value 12VDC

0 Output signal: square wave

Low electrical level：≤1VDC

High electrical level：Power supply voltage VDD-3VDC

Output signal frequency: (at lower limit of flow) not lower than 20Hz

（2） Type LWF-P-2 pulse output pre-amplifier is a preamplifier featuring strong load 

capacity and adaptability of power supply source, and it may provide reliable pulse signals 

to PLC.

For wiring connection, please see Figure 8-1, in which +12VDC is modified to +24VDC.

0 Power supply source: VDD is the nominal value24VDC

0 Output signal: square wave

Low level：≤1VDC

   High level：Power supply voltage VDD-3VDC

Output signal frequency: (at lower limit of flow) not lower than 20Hz

（3）Type LWF-P-3 pulse output preamplifier is a preamplifier designed for high temperature 

conditions of materials and structures of the detector parts on the basis of Type LWF-P-2 amplifier. 

Under the precondition that the ambient temperature is not higher than 55℃, the medium temperature 

may come up to 150℃.