Platon Infra-Red Flow Alarm

Platon Infra-Red Flow Alarm – Overview

The Platon Infra-Red Flow Alarm DS1120 uses an infra-red beam across the glass flow tube of a Variable Area (VA) flowmeter to determine float position. Passage of the float between the sensor arms is detected, and the sensor determines whether the float is above or below the sensor position. Electronics inside the sensor module give an open collector transistor output, suitable for external logic circuits. Suitable for all gas flows and liquid flows where the float is visible. The sensor is clipped to the back of the flowmeter frame. Movement up and down the frame allows the sensor to provide a flow alarm at any point on the tube scale, as required. The optional mains interface and relay module are used to provide the DC power needed to drive the sensor electronics, plus a SPCO 8 Amp mains relay output. This relay acts as a slave to the transistor output from the sensor module. Each relay module has two output relays and can be used to monitor two separate alarm sensors.

Platon Infra-Red Flow Alarm – Features

High or low flow arm
Intelligent: Knows whether float above or below sensor
Adjustable over full range of flow tube
Suitable for normal (NG/NGX) or miniature (LG/LGX) flowmeters
DC output direct to standard logic circuits
Optional mains interface relay module

Description

Platon Infra-Red Flow Alarm | DS1120

Specification

Sensor Type

IR Beam break detection

Direction Logic

Position of float above/below sensor established on first detection of float after power up

Setting Position

Held by spring clip anywhere in flow tube operating range

Temperature

-5 to +50?C

Environment

IP44 with cable exit downwards

Dimensions

22 x 66 x 30 (HxWxD) 5mm space needed behind frame. Spacer provided

Sensor Cable

2m, 3 core screened

Cable Functions

Red – positive
Black – OV common
White – Transistor output

Voltage Supply

12V nominal, 8V – 26VDC range at 25mA

Output (Sensor Positioned with Cable Exit Down)

Open circuit for low flow alarm, conducts for flow above switch point

Switch Points

For falling float, top edge of float at centre line of sensor. For rising float,
switching occurs when base of float passes centre line

Compatibility

Frames
All standard GIR sensors are supplied with a fitting kit suitable for use on Platon NG, LG, NGX, or LGX style frames. The sensor can be supplied and fitted within Platon GU or SGUV style housings.

Flow Fluid
GIR sensors are supplied set up for the flow tube size specified and either liquid or gas as the flowing medium. The sensors are not normally interchangeable between different-sized flow tubes.

Flow Scales
For size 1 and 2 flow tubes, the flow scale artwork serial number (eg CA 141002) must be issue C or later (first digit). Otherwise, the scale marks may interfere with the infra-red beam. For size 3 flow tubes, GIR sensors will work correctly on all previously supplied scale artworks. Consult the sales office and specify flow tube and alarm sensor module together.

Platon Infra-Red Flow Alarm | DS1120

Platon Infra-Red Flow Alarm | DS1120

Platon Infra-Red Flow Alarm | DS1120