TINKER & RASOR CPV-4 Cathodic Protection Digital Voltmeter

The Tinker & Rasor CPV-4 Digital Cathodic Protection Voltmeter is used for measuring D.C. potentials between a reference electrode and a structure.
It has an input resistance of 20 megaohm and two voltage ranges, 0-2v DC and 0-20v DC. The CPV-4 is a great choice for all CP testers and includes one 6A Copper Sulfate reference electrode, which can also be substituted for 2A, 6B, 8A or 8B.

Connection methods
The Model CPV-4 has a connection for the half-cell to screw into the back of the voltmeter. When using this option, the half-cell is connected to the Positive (+) side of the voltmeter. A test lead is then connected between the Negative (-) post of the voltmeter and the structure.

This setup is used by many companies and technicians, as a "good" read, for instance 0.85v, is displayed as a positive number. Many companies and technicians like to use positive numbers in recording reads. Also, an analog meter may not display a negative reading, so companies or technicians who have both digital and analog meters have standardized using this method.

Voltmeter, Complete W/ Half Cell Digital Meter
Includes one 6A reference electrode, or one of your choice (2A, 6B, 8A or 8B)
Hand-held instrument
LCD digital display
2v and 20v DC scale
Meter displays positive and negative readings
20MΩ impedance
Filters AC interference
Works with T&R Reference Electrodes: 6A, 6B, 8A, 8B
Durable die-cast aluminum case
Powder coated finish

In The Box
Instrument with battery
5' coiled cable, banana jack and spade connection
5' coiled cable, banana jack and clamp
6-A reference electrode (CuCu/SO4) or your choice of 2A, 6B, 8A or 8B
Carrying case with foam insert
Instruction manual