A locator clamp is used to positively locate and identify a cable when several cables are running close together.
A target cable can be identified in a chamber, on a tray or other access point by fitting a clamp to the locator and examining each cable in turn. Signal strength response shown on the locator display should be noted for each cable.
When to use clamps
Clamps can be used where:
- Several cables or pipes run in close proximity to each other.
- A cable or pipe is accessible at an inspection hole or manhole.
NOTE: The standard clamp cannot be used with CD. A special CM / CD clamp is available to clamp the lower frequency CD signals.
Connecting a clamp
- Put the clamp connector into the accessory socket on the front of the RD8200 locator.
- Place the clamp around the pipe or cable and switch the locator on.
- Set the frequency to the same as that on the transmitter.
- Put the clamp around each cable in turn and note the bar graph response. Compare the strength of response from each cable. The cable with a substantially stronger response than the others will be the cable to which the transmitter signal has been applied.
Connecting clamps
To ensure that the target cable has been correctly identified, reverse the positions of the transmitter and locator and check that the strongest response is still received from the target cable by the locator in its new position.
Locator clamp range
Standard clamps
The clamp plugs into the locator accessory socket and is used for cable identification at points where the cable can be accessed. The standard clamps are suitable for cables up to 130mm (5¼”) diameter.
Standard Clamp
Small clamp
The small clamp performs the same function as the standard clamp but is useful in cramped situations where there is insufficient access for the standard clamp.
The small clamp is suitable for cables up to 50mm (2”) diameter.
Current Direction™ (CD) and Current Measurement (CM) clamp
The CD / CM clamp plugs into the accessory socket of the locator and enables CD and current measurements to be made on individual cables.
Locator CD / CM Clamp
This accessory is used to identify a particular cable that is bunched with several other cables or in close proximity to other cables. The combination of direction current and current magnitude is extremely useful for identification purposes.