AW Gear Meters CAPM-3o - Manual

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