AEMC instruments CA7027 사용자 설명서 - 페이지 13

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AEMC instruments CA7027에 대해서도 마찬가지입니다: 사용자 설명서 (20 페이지)

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The injected signal oscillates between 810 and 1110Hz, six times per

second.

NOTE: The auto-off function is disabled in Tone Generator mode, so that

the tone can be injected into a cable for an extended period of time while

tracing takes place.

See §4.10 for attaching a cable to the Fault Mapper Pro

4.7

The Fault Mapper Pro

19,000 ft (0.5 to 6000m).

To select a range scale, or scan the cable run, press and hold down the

TDR /

button to increase the range.

4.8

To adjust the Vp, press and hold the

TEST /

Next use the

Ms or Vp % UC.

Press the

4.9

Vp, or Velocity of Propagation, values are characteristic of each cable

type and brand. The Vp is used to measure the length of a cable and to

measure a fault location. The more accurate the Vp, the more accurate

the measurement result will be.

The cable manufacturer may list the Vp on their specification sheet

or may be able to provide it when asked. Sometimes this value is not

readily available, or the user may wish to determine it specifically to

compensate for cable batch variations or for special cable applications.

Fault Mapper Pro

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Selecting Full Scale Sensitivity

has 11 range scales covering the range of 1.5 to

button, then press the

Adjusting the Vp Value

button to enter the setup mode. Release both buttons. Press the

button until the pointer (>) is next to Vp.

and

buttons to adjust the Vp to scroll between v/2, M/

TDR /

button to exit the set up mode.

Determining and Measuring Vp Values

Model CA7027

GlobalTestSupply

www.

button to decrease the range or the

TDR /

button and press the

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