AW Gear Meters CAPM-3o User Manual

Capm-3o carrier frequency pickup module, Technical data, Installation & technical guide

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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. 5/24/12 CAPM-3o.DOC

CAPM-3o Carrier Frequency Pickup Module

Installation & Technical Guide


Installation:

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

Remove the lid from the CAPM-3o, use the 2 inner screws to attach the sensor to the meter and replace the lid.

Wiring should be installed by a qualified instrumentation technician.

Some basic installation guidelines are reviewed overleaf.

Description:

The CAPM-3o is a UL approved, intrinsically safe pickup sensor for use in Class 1, Div. 1 locations. The output
signal is a frequency proportional to flow in a square wave voltage form of approximate amplitude: Supply

1.5V. The sensor must be installed with an intrinsic safety barrier in accordance with the guidelines detailed in
document # CAP2902

CAPM INSTALLATION IN HAZARDOUS AREA. Recommended barriers such as

Pepperl & Fuchs Z787 (12-28V) are available from AW Gear Meters.

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

An NPN sinking type is available and is designated as CAPM-3i.

Technical Data

Supply Voltage: 10 to 30 Volt DC
Supply Current: 20 mA @ 15 Volt, Max 35 mA
Minimum Signal: 0.5 Hz
Signal Output: Square wave, V

High

≈ V

CC

- 1.5V

V

Low

≈ 0V


Duty Cycle:

50%

Frequency Output:

Flow dependent, up to 2000 Hz

Load:

>500

Ω

Driving Capacity:

10 mA Max

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

Connections:
A

– +10 to 30 Volt DC 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

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