RD4000 Locating System User Manual
Page 62
Types and range of transmitter clamps
Although transmitter and receiver clamps look the same, they have different internal windings. To prevent the
wrong clamp being connected, transmitters and receiver clamps have plugs of a different orientation.
Standard signal clamp
The standard clamp applies the transmitter signal very
selectively and effectively to a target cable up to
10cm/4-inch diameter at 8 /33kHz frequency or up to
75mm/3-inch diameter cable at 512 Hz.
The standard and small clamps have a double spring action for
positive toroidal contact.
Small signal clamp
The small signal clamp is useful for applying an 8 kHz and
33kHz signal to a target cable in a pedestal or other place with
limited space. The clamp is suitable for cables up to 5cm/2-
inch diameter.
Current Direction (CD) and Current Measurement (CM) clamp
The CD/CM clamp plugged into the accessory socket of the
transmitter enables CD and CM signals to be applied to
individual cables.
WARNING. The transmitter must only be connected to live
services using the appropriate accessory such as a plug
connector or live cable connector.
Plug connector
A plug connector applies the transmitter signal to a live
domestic socket onto the service cable and the distribution
cable in the street. The 8kHz/33kHz signal is applied between
the live and ground conductors on a three-pin plug. The
connector can also be fitted with a 2-pin plug with the signal
applied across the live and neutral.
The plug type must be specified at the time of order.
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