Vitrek V4 - V4 Calibration Procedure

Vitrek V4 – Electrical Safety Tester USER MANUAL
59
Problem: Unit reports “Error ACW Hot Heatsink”
Solution: The V4 EST’s are not designed to source current above 10mA for more than 10 seconds.
Repeated high duty cycle use above 10mA will cause overheating to occur.
8-4. Vitrek V4 Calibration Procedure
Calibration Procedure No. V50-020502
The following procedure will provide verification of the calibration status of the Vitrek V4 EST. Utilize
the attached V4 calibration data sheet for verification sequence, nominal values and maximum allowable
tolerance. Not all units in the V4 have all functions. Omit test points for any given unit where dashes are
shown.
Calibration Verification Equipment
Precision AC/DC High Voltage Meter (Vitrek model 4600A or equivalent)
Vitrek 4610A (or 501) HV Standard Resistor Set - 1Ω, 100kΩ (10watts minimum), 1MΩ, 100MΩ, 1GΩ
Verification Procedure
1. Using ACW mode, measure and record the AC output voltages of the V4 at settings of 1000 and
5000VAC.
2. Reduce output to zero and hook-up 1MΩ across HV output and return. Apply 1000VAC to resistor and
record 1MA reading. Be sure to correct reading for any known deviation from 1000VAC output.
3. Repeat step 2 using 100kΩ for 10mA reading.
4. Using DCW mode, measure and record the DC output voltages of the V4 at settings of 1000 and
6000VDC.
5. Using DCW mode, output 1000VDC into a 1MΩ resistor to record 1mA reading. Note: minimum load
impedance for DC mode is 330k ohm.
6. Using the IR mode, measure and record 100MΩ and 1GΩ resistors.
7. Use continuity cal function (under “utility”) to “zero out” lead resistance prior to checking continuity
accuracy. Using continuity mode, measure and record 1Ω resistor
Vitrek V4 Calibration Data for
ANSI/NCSL Z 540
S/N:
_____________
CAL DATE:
________
CAL DUE:
_________
Nominal Values
Incoming
Readings
Outgoing
Readings
Maximum
Tolerance
1000VAC
VAC VAC
±15VAC
5000VAC
VAC VAC
±55VAC
1mA AC
mA AC mA AC
±.06mA AC
10mA AC
mA AC mA AC
±.15mA AC
1000VDC
VDC VDC
±15VDC
6000VDC
VDC VDC
±65VDC
1mA VDC
mA VDC mA VDC
±.06mA VDC
100MΩ 500V
M M
±5MΩ
1000MΩ 500V
M M
±100MΩ