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AIR PURGE COLLAR

The air purge collar below is used to keep dust, fumes, moisture, and other contaminants

away from the lens. It must be screwed in fully. Air flows into the 1/8" BSP fitting and out of

the front aperture. Air flow should be 5 to 15 litres/min.

Clean or 'instrument' air is recommended.

Screw thread ﬁtting

ELECTRICAL INSTALLATION

The 4-20 mA output cable is 1 m long as standard. The outer jacket is PVC. One end is

attached, at the factory, to the sensor head. The other end has a pair of wires and a shield

(ground) wire.

WIRING

The sensor can be used in 3 different ways as shown below. To use the 4-20 mA output,

connect the sensor to the controller/indicator with the 24 V DC power supply in the loop

using the following table and connection diagram as a guide. The maximum loop impedance

is 900 ohms.

Note: The sensor must be grounded at only one point, either the cable shield or the

sensor housing.

Output

4 to 20 mA

–

Alternatively, to use the USB output, connect the sensor to a PC using the cable provided. No

external power supply is required when using the USB output. The sensor can also be used

with both the 4-20 mA loop and USB connected, provided that the negative terminal of the 24

V DC power supply being used is not grounded.

IMPORTANT: The sensor will work only with the supplied USB cable. Connecting any

other type of USB cable may damage the sensor and invalidate the warranty.

Note: The software must be installed before connecting the sensor to a PC.

for sensor

M20 x 1

Wire No.

Air connection

1/8 BSPT

Air out

58.5

Wire Colour

Red

Black

Bare

Function

Power supply + / signal +

Power supply - / signal -

Shield ground