-Instructions for CPV-2 Voltmeter-
|The Model CPV-2 Cathodic Protection Voltmeteris used for measuring D.C. potentials between a reference electrode and a structure.|
Check all components against packing list.If damage has occurred in shipment, file a claim with the carrier immediatelythe manufacturer concerning damaged or missing items, be sure to includeall the information such as serial number, purchase order number and invoicenumber. This will assure you of obtaining proper and expeditious service.
2. OPERATING WITH HALF CELL ELECTRODE ATTACHED
A. Screw half cell into back of Model CPV-2instrument.
B. Remove protective vinyl cover from endof half cell electrode.
C. Place ceramic end of half cell in contactwith moist earth. (Half cell must be properly
D. Connect test lead from negative terminalon instrument to the structure.
E. Observe and record meter reading. Note:No switch to push for taking reading. Operation
3. DIFFERENCES BETWEEN METHODS OF CONNECTION
The Model CPV-2 has a connection for the halfcell to screw into the back of the voltmeter. When using this option, the halfcell is connected to the Positive (+) side of the voltmeter. A test lead is thenconnected between the Negative (-) post of the voltmeter and the structure.
This setup is used because an analog meter will not display a negative reading. The meter will deflect all the way to the left, below zero (0).
However, there are some groups that teach a different connection method. NACE International and Peabody's Control of Pipeline Corrosion, for example, both suggest connecting the Negative (-) terminal to the half cell, and the Positive (+) to the structure. This would then change the polarity of the reading, so that the same reading as given in the previous example, would then be displayed as -0.85v. This method cannot be used with an analog meter. Only use this method with a digital meter
4. BATTERY TEST
To check batteries, depress red buttonon instrument panel. Instrument should not be in operating position whiletesting batteries. Maximum battery drain is in the order of 110 micro amperes;therefore, they should have a life expectancy of nearly one year.
Warranty is on workmanship and materialfor 90 days from date of purchase. Warranty does not cover transportationnor damages beyond normal wear and tear.
6. NON-WARRANTY REPAIR POLICY
Tinker & Rasor will repair any reparablepast -warranty Model CPV-2 (instrument only) for a charge not to exceed35% of current list price for a period of five years from date of sale.
All instruments being returned for repair should be sent PREPAID to either address below:
Include with shipment information the nature
of the problem, purchase order, serial number