Acuity AccuRange AR500, Руководство пользователя

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AR500 User’s Manual
LLL00xxxx – Rev 1.0 7
3. Installation and Checkout
3.1 Mounting
Mount the sensor in such a way that the case not twisted or warped. Do not
clamp or squeeze the sensor case excessively. If the case is distorted, the
sensitivity and accuracy of the sensor may be affected.
3.2 Cabling for sensor unit
The AR500 sensor has a multipurpose cable with 8 conductors (included).
Special-order Ethernet sensors will include a second cable with 4 conductors.
The standard cable is LiYCY (TP) a flexible, overall shielded, PVC twisted-pair
data transmission cable for use in flexible and stationary applications under
low mechanical stress with free movement without any tensile stress, loads
or forced movements in dry, damp and wet conditions. The twisted pair
construction reduces interference (crosstalk) within the cable while the
tinned copper braid shield offers optimum protection from electrical and
electromagnetic interference. Not suggested for outdoor use.
The standard cable length is 2 m in length and longer cable lengths are
available. Connection and termination according to the instructions is
essential for correct sensor operation. Read the wire descriptions in Section
4.1 for connection information.
Connect the cable’s 8-pin connector (Binder series 712, female) to the plug
(Binder series 712, male) on the back cover of the AR500 sensor. Be sure to
tightly secure the connection for full protection from dust and water.
3.2.1 Standalone Cabling
To use the AR500 sensor unit without a serial connection to a host
computer, the only connections necessary are the power and ground
wires, the analog output wires, and optionally the alarm output wire
connecting to your data display, recording, or control equipment. See
Signal and Power Interface (section 4) for wire connections. In its default
configuration, the AR500 should stream measurement distances on
power-up.
In 4-20mA analog output mode, the best accuracy and linearity for the
current loop is obtained with a 500-ohm load to current loop return at
the measurement point. To reduce noise, it is recommended to install RC
(resistor-capacitor) filter before the measuring instrument. The filter
capacitor value is indicated (in section 4.4) for maximum sampling
frequency of the sensor (9.4 kHz) and this value increases in proportion
to the frequency reduction. An out-of-range current indicates a sensor
measurement error.
The alarm output wire can be used to connect to control equipment.