Radiodetection RD500, Быстрый старт

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RD500 Quick Start Guide 2.0 © 2017 Radiodetection Ltd. Page 3 of 9
Transmitter Application Techniques:
Transmitters are connected at sprinkler heads, hose bibs, water meter bases, fire hydrants and clean-
outs. Supplied transmitter adapter kits are illustrated later in this manual. Always flush any connection
site until the water that flows is clear of all rust, silt, sealing compounds and foreign materials before
connecting a transmitter to the water line.
All adapter kits are supplied with a 3 meter (10 foot) high-pressure drain hose that must be connected to
the outlet of the transmitter in order for the device to work properly. Always use a weight on the hose or
tie the hose down to prevent the hose from whipping.
Check the water pressure before attempting to locate the water line and make sure that it is in the
operating range of the transmitter, which is 3 to 10 bar (40 to 140 psi).
The transmitters are color-coded to identify their intended usage: A color-coded ty-wrap is used along
with a small square area that is painted on the side of the transmitter to indicate the colour. Green is the
lowest power transmitter and is intended for use on sprinkler and hose bib pipes that typically range in
diameter between 1.3cm and 5cm (0.5 inches and 2 inches). Green transmitters may be may be used on
larger diameter pipes where reduced operating range is acceptable. Yellow transmitters are intended for
use on water mains that range in diameter between 5cm and 15cm (2 inches and 6 inches). They are
typically connected at a water meter connection. Yellow transmitters should never be used on smaller
diameter pipes, but they may be used on larger diameter pipes. Red transmitters are intended for use
only on water mains that are 15cm (6 inches) in diameter or larger. The typical connection is via a fire
hydrant.
Always start your adjustments by turning the T-handle clockwise until full water flow is attained at the
transmitter outlet. Then, slowly turn the T-handle counter-clockwise until the transmitter begins to pulse.
Once the pulsing begins, turn the handle very slowly in each direction to fine tune the pulse to a regular
beat of about two to five times per second. This adjustment range varies between less than one turn to
several turns depending on the operating conditions. If you turn the T-handle too far in the clockwise
direction, water will flow continuously without pulsing, and if you turn the T-handle too far in the counter-
clockwise direction, water flow will stop completely.
The best results are obtained with the slowest pulse possible. Range and signal strength are greatly
improved with low pulse rates of a few pulses per second. Higher water pressures typically cause faster
pulse rates. Pulse rates above 10 pulses per second are difficult to use and cause reduced location
range.
The transmitter contains a locking collar located directly below the T-handle. Tighten the hex-shaped
collar to prevent the T-handle from moving (walking) while pulsating.