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AW Gear Meters 8809 Industrial Drive, Franksville, WI 53126  web: www.awgearmeters.com

Tel: 262-884-9800Fax: 262-884-9810  Email: [email protected]

REV. 10/11 CAPM-2.DOC

CAPM-2 Carrier Frequency Pickup Module

Installation & Technical Guide

Installation:

• Ensure that the flow meter sensor cavity is free of debris prior to installation.

• Screw the CAPM-2 into the flow meter by hand until the sensor nose contacts the bottom of the cavity.

• Do not screw in harder than hand tight, as a thin metal section is under the sensor nose.

Please heed the following warning:

CAUTION: DO NOT EXCEED 7 NEWTON-METERS FORCE TO SEAT THE SENSOR, THIS IS

EQUIVALENT TO HAND TIGHT. EXCESS FORCE MAY CRUSH THE SENSOR NOSE OR

DAMAGE THE FLOW METER BY FORCING THE METAL SECTION UNDER THE SENSOR INTO

THE MEASURING CHAMBER.

Wiring should be installed by a qualified instrumentation technician.

Some basic installation guidelines are reviewed overleaf.

Description:

The CAPM-2 is a Carrier Frequency sensor, which means there is no permanent magnet in the

pickup, and any magnetic drag on the flow meter is avoided. The CAPM-2 requires a supply voltage

between 10 VDC and 30 VDC. A diode in the supply input prevents damage to the module in case

the polarity of the supply voltage is wrong. The output signal is a square wave, voltage pulse of

approximate amplitude (supply – 1.5 V). The frequency is proportional to the flow rate.

The output is a sourcing open collector transistor (PNP Type).

An NPN sinking type is available and is designated as CAPM-2N.

Technical Data

Supply Voltage: 10 to 30 VDC

Supply Current: 9 mA @ 15 Volt, Max 18 mA

Minimum Signal: 0.5 Hz

Signal Output: Square wave, V

High

≈ V

- 1.5V

Low

≈ 0V

Duty Cycle: 50%

Frequency Output: Flow dependent, up to 2000 Hz

Load: >500Ω

Driving Capacity: 10 mA Max

Temperature Range: -60°F to 185°F (-50°C to 85°C)

Connections:

A = +10 to 30 VDC supply voltage

B = Ground for supply and signals

C = Frequency signal output

Note: If signal does not go to ground, connect

external resistor, 5 K-10 Kohm, between input and

ground of monitoring equipment.

Figure 1

AW Wiring Color Code:

Supply Voltage: Red

Ground: Black

Signal: White

1 2

Technical Data 1
Figure 2 2

Sommario

Pagina 1 - Technical Data

AW Gear Meters 8809 Industrial Drive, Franksville, WI 53126  web: www.awgearmeters.com Tel: 262-884-9800Fax: 262-884-9810  Email: awinfo@aw-

Pagina 2 - Figure 2

AW Gear Meters 8809 Industrial Drive, Franksville, WI 53126  web: www.awgearmeters.com Tel: 262-884-9800Fax: 262-884-9810  Email: awinfo@aw-

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