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Rev 6 – Feb 2022
Page 23 of 44
When surveying DCVG only surveys, it is essential to record the test station OFF and ON potentials
before and after any defect. This is used to approximate the size of the defect by calculating the %IR
value.
Survey Personnel & Cable Configurations
There are many possible configurations of personnel and cables depending on the survey types
selected. The Hexcorder Pro is supplied with the Wire cable and 2 pole cables for surveys involving
Center and Right channels. Additional poles and Y-cables are available for multi-channel DCVG.
Scope Mode
Tap the SCOPE tab to enter scope mode. The term ‘scope’ and ‘waveform’ are often used
interchangeably in the CP industry. There are two types of scope captures that can be used, AC
SCOPE and DC SCOPE. GPS lock is required to use the scope function.
Scope readings can be useful in detecting misfiring current interrupters, AC from overhead power
lines, telluric activity, and foreign influences. The scope captures 4096 samples per second, up to 30
second cycles. Longer than 30 second cycle times use a reduced sample rate due to memory buffer
limitations.
Survey Type
Left
Center
Right
Wire
CIPS / CIS
■
■
■
DCVG/ACVG
■
■
CIPS & DCVG/ACVG
■
■
■
2x DCVG/ACVG
■
■
■
CIPS & 2x DCVG/ACVG
■
■
■
■
4x DCVG
■ x2
■
■ x2
Double Impedance CIPS
■
■
■
Double Impedance CIPS & DCVG/ACVG
■
■
■
Parallel CIPS
■
■
■
Double Impedance CIPS & 2x DCVG/ACVG
■
■
■
■
New TP