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
8-1
Figure 8-1 Connection Terminal Diagram of Type LWF－P Pre-Amplifier
Power supply source: VDD is the nominal value 12VDC
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