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High Voltage Safety is important. Always ground the probe to a reliable ground
point near the measurement point. Do not touch the probe during high voltage
operation. Stay away from malfunctioning high voltage equipment and ground it
carefully if it must be touched. Failure to ground the probe near the device under
13.56 Mhz users should use a 0 ohm series resistor for PVM1..PVM6
Voltage Probe Manual and Data
North Star High Voltage, Inc.
Rev March 2018
test can also destroy the probe.
5610 Rose Loop NE
Bainbridge Island, WA, USA 98110
(520)780-9030; (206)219-4205 FAX
http://www.highvoltageprobes.com
probes@highvoltageprobes.com
Safety
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Summary of Contents for North Star PVM-1
- Page 1 (520)780-9030; (206)219-4205 FAX http://www.highvoltageprobes.com probes@highvoltageprobes.com Voltage Probe Manual and Data North Star High Voltage, Inc. Rev March 2018 Safety High Voltage Safety is important. Always ground the probe to a reliable ground point near the measurement point. Do not touch the probe during high voltage operation.
- Page 2 General The PVM and VD series high voltage probes are RC dividers designed to produce precisely attenuated signals over a very wide bandwidth. The circuit diagram is shown below. The divider network consists of a high voltage network represented by a parallel capacitor and resistor, and a low voltage network which consists of a parallel RC network and a compensation circuit.
- Page 3 0.5 - 1 % is possible if conductors are closer. Proximity Effect for PVM-1 – PVM-7, PVM-100 The PVM-1 – PVM-7 use a unique shielded design which both reduces proximity effects and increases the “speed” of measurement into the low nanosecond regime. Proximity effect at reasonable distances (15 cm) are too low to measure in the PVM1- PVM6 probes.
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Page 4: Troubleshooting
If there is a problem, dis-assembly of the probe high voltage section is not recommended. Except in unusual situations, North Star will repair the probe without question if it is under warranty. It is much easier for us to ascertain the problem if the probe has not been modified by the user when it is returned to us. - Page 5 1000:1 1000:1 10,000:1 1000:1 1,000:1 1,000:1 1,000:1 1,000:1 1,000:1 1,000:1 Ratio (100:1) (100:1) Length 19/47 19/47 19/47 19/47 19/47 19/47 7/18 9/23 7/18 9/23 (inches/cm.) Add -2 to any PVM-1 – PVM-6, PVM-11 or PVM-12 part number for 2000:1 ratio...
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Page 6: Warranty
(6) months after shipping irrespective of the cause of the fault. Shipping from the customer site to North Star will be paid by the customer, and shipping from North Star to the customer will be paid by North Star. North Star will judge whether expedited means of shipping are required. - Page 7 DC value or continuous value of voltage the probe can be used at. For example the PVM-1 has a 40 kV continuous DC rating. There is no duty cycle limitation for any of our DC ratings on standard products.
- Page 8 DC voltage. In no case does the derating allow the user to exceed the limits discussed above. North Star probes have dielectrics chosen to have low loss. In the limit where the loss tangent tanδ is fixed with frequency (true of both or Teflon and C0G/NP0 dielectric materials) P ~ 2f(tanδ)((1/2)CV...
- Page 9 PVM-1, PVM-2, PVM-3 Derating - AC 100% Duty Frequency (MHz) PVM-5, PVM-6 Derating - AC 100% Duty Frequency (MHz) Above ratings are for the probe with a zero ohm metal insert for the series damping resistor. These are average frequencies. For example if the frequency is 10 Mhz in...
- Page 10 VD-200 VD-300 VD-400 1000 10000 100000 1000000 10000000 Countinuous Frequency (Hz) VD-60 VD-100 VD-150 1000 10000 100000 1000000 10000000 Continuous Frequency for AC or Pulse Repetition Frequency (Hz)
- Page 11 Series Damping Resistor – Repetition Rate and Average Power Limitations The purpose of the resistor at the front of the on the PVM-1...PVM-7 and PVM-100 is to damp oscillations at frequencies above about 35 Mhz or for risetimes of 10 ns or faster.
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