Calex PyroUSB Series, Руководство оператора

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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.
27
58.5
47
34
26
Air out
Air connection
1/8 BSPT
Screw thread fitting
for sensor
M20 x 1
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 Wire No. Wire Colour Function
4 to 20 mA 1 Red Power /
2 Black Power supply - / signal -
– 3 Bare Shield ground
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.