Tinker & Rasor VC-2 Instruction sheet

Web: www.tinker-rasor.com E-mail: [e-mail]
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Sponsoring members of NACE International, NACE Foundation QMF-570 007-118
PRODUCT INSTRUCTIONS
Model VC-2 Voltmeter Verifier
1. VOLTMETER VERIFIER
The Model VC-2 Voltmeter Verifier provides highly accurate output voltage to verify voltmeters used for Cathodic
Protection testing. The VC-2 will work with any voltmeter or multimeter on DC volts setting. The VC-2 offers the
following voltage outputs: 0.001v, 0.01v, 0.1v, 1.0v, 2.5v, 5.0v
The VC-2 is a portable, battery operated instrument. With the VC-2, you can test voltmeters on a scheduled basis
or at each use, and this performance check allows you to send voltmeters that are out of calibration on an
exception basis rather than a time based schedule.
The VC-2 is a very accurate instrument and should be put on an annual calibration cycle. Tinker & Rasor
performs calibration services in its Southern California factory with a 24-hour turn around.
2. INSTRUCTIONS FOR UNPACKING & INSPECTION
A. Open the package and ensure you have received all items stated on the packing list, usually in a plastic
pouch on the outside of the packing box.
B. INSPECTION should be made upon receipt. If damage has occurred during shipment, file a claim with
the carrier immediately.
C. If it is necessary to contact your supplier or the Tinker & Rasor concerning damaged or missing items, be
sure to include the serial number, purchase order number, and invoice number of the instrument in
question.
3. USE INSTRUCTIONS
A. Make sure that the instrument is turned OFF. No Red Power LED.
B. Connect the voltmeter to be verified to the VC-2. Connection to the VC-2 should be made using the leads
from the voltmeter being tested. (The voltmeters leads are an important part of verifying the performance
of the instrument. For this reason, the VC-2 does not come with leads of its own.)
C. When connecting the leads polarity must be observed. The RED terminal is positive and the BLACK
terminal is negative.
D. Prior to turning the VC-2 to On, move the voltage
selector knob all the way counter clockwise to the 0.001v
setting.
E. Adjust the voltmeter to the proper scale for the selected
output voltage of the VC-2 instrument.
F. Turn the VC-2 on by pressing the power button. The Red
LED lights.
G. The voltage output will begin immediately as soon as the
VC-2 is turned On.
H. Observe the reading on the voltmeter and compare the
knob position on the VC-2.
I. Move the knob clockwise and at each knob setting,
observe the voltmeter display reading against the VC-2
knob position.
J. It is recommended to always turn the VC-2 OFF when adjusting, connecting or disconnecting lead wires.
CORROSION MITIGATION INSTRUMENTATION
2828 FM 758, NEW BRAUNFELS, TX 78130 TEL: [phone]

Web: www.tinker-rasor.com E-mail: [e-mail]
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Sponsoring members of NACE International, NACE Foundation QMF-570 007-118
PRODUCT INSTRUCTIONS
4. POLARITY
Many Cathodic Protection reads are made in the negative (-) range of CP voltmeters. Because of this, it is
recommended that the lead wires being connected to the VC-2 be reversed, and the above test procedure be
repeated, observing the now negative display voltages on the voltmeter.
5. BATTERY
The VC-2 operates using (1) 9v battery, located inside the case of the Model VC-2. The
VC-2 has a low battery feature to inform when the batteries are low. The RED power
LED will begin to blink when the battery needs replacement. It is important to note that
the accuracy of the VC-2 will be affected by using batteries that provide less than 7.0v.
To access the battery, turn the instrument over, so that the back side of the case is
exposed. You will note the slide door for the battery compartment. Carefully pull the 9v
battery out until you can remove it from the connector. Do not pull hard on the connector,
It is wired into the case. Connect the new battery, observing polarity, into the connector.
Note that the connector has a big and small receptacle for the battery terminals. Insert
the battery into case and slide door on to close.
6. CALIBRATION
It is recommended that the VC-2 instrument be returned to the Tinker & Rasor factory on an annual basis for
calibration check. When the instrument is returned for calibration services, Tinker & Rasor technicians put the
instrument through the test procedures and ensure all performance checks are made.
After passing all calibration checks, the VC-2 is given a calibration sticker that shows the instrument name, serial
number, date of calibration and recommended return date for the next calibration service. A formal calibration
document is also provided with the instrument when it is returned.
Calibration and repairs services are offered on a 24-hour turnaround.
7. FACTORY REPAIRS
Instruments returned to the factory for repairs should be sent TRANSPORTATION PREPAID. In most cases the
instrument can be serviced and returned the next day it is received at the factory.
Visit www.tinker-rasor.com for shipping address information or call 830-253-5621.
107-119
CORROSION MITIGATION INSTRUMENTATION
2828 FM 758, NEW BRAUNFELS, TX 78130 TEL: [phone]