Teledyne Lecroy HVD3102 User manual

Operator's Manual
HVD3102 and HVD3106
High Voltage
Differential Probes
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HVD3102 and HVD3106
High-Voltage Differential Probes
Operator's Manual
June 2014
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HVD3102 and HVD3106 High-Voltage Differential Probes Operator's Manual
© 2014 Teledyne LeCroy, Inc. All rights reserved.
Unauthorized duplication of Teledyne LeCroy documentation materials other than for internal
sales and distribution purposes is strictly prohibited. However, clients are encouraged to
distribute and duplicate Teledyne LeCroy documentation for their own internal educational
purposes.
Teledyne LeCroy is a trademark of Teledyne LeCroy, Inc. Other product or brand names are
trademarks or requested trademarks of their respective holders. Information in this publication
supersedes all earlier versions. Specifications are subject to change without notice.
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Operator's Manual
Contents
Safety 1
Symbols 1
Precautions 1
Introduction 3
Requirements 4
Probe Kit 5
Standard Accessories 6
Voltage Derating for Standard Accessories 8
Specifications 9
Guaranteed Specifications 9
Environmental Characteristics 9
Common Mode Rejection Ratio 12
Input Voltage vs. Frequency and Burn Limit 13
Differential Mode and Common Mode 14
Differential Mode Range and Common Mode Range 14
Differential Input Impedance 14
Operation 15
Connecting to the Test Instrument 15
Connecting to the Test Circuit 15
Operating with an Oscilloscope 16
Maintenance 19
Cleaning 19
Calibration Interval 19
Service Strategy 19
Replacement Parts 19
Returning a Product for Service 20
Functional Test Procedure 21
Required Equipment 21
Test Procedure 21
Performance Verification 22
Required Equipment 22
Preliminary Procedure 23
Certification Procedure 23
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HVD3102 and HVD3106 High-Voltage Differential Probes
HVD3102/HVD3106 Test Record 25
Reference 26
Certifications 26
Warranty 29
Contact Us 30
Notes 31
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Operator's Manual
Safety
Follow these instructions to keep the probe operating in a correct and safe condition. Observe
generally accepted safety procedures in addition to the precautions specified in this section. The
overall safety of any system incorporating this product is the responsibility of the
assembler of the system.
Symbols
These symbols appear on the probe or in documentation to alert you to important safety
considerations.
CAUTION of damage to instrument, or WARNING of hazard to health. Attend to the
accompanying information to protect against personal injury or damage. Do not
proceed until conditions are fully understood and met.
HIGH VOLTAGE WARNING. Risk of electric shock.
ESD CAUTION. Risk of electrostatic discharge (ESD) that can damage the instrument if
anti-static measures are not taken.
Double Insulation
Measurement Ground
Precautions
Avoid personal injury or damage to your equipment by complying with the following safety
precautions:
Use only as specified. The probe is intended to be used only with compatible Teledyne LeCroy
instruments. Use of the probe and/or the equipment it is connected to in a manner other than
specified may impair the protection mechanisms.
Do not overload; observe all ratings. To avoid electric shock or fire, do not apply any potential
that exceeds the maximum rating of the probe and/or the probe accessory, whichever is less.
Observe all terminal ratings.
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HVD3102 and HVD3106 High-Voltage Differential Probes
Connect and disconnect properly. Always make the connections from the probe input leads to
the probe accessory that you intend to use before making any connections to a voltage source.
Do not connect accessories to (or disconnect from) a voltage source unless they are first
connected to the probe input leads. Avoid damaging cables through excessive bending.
Use only accessories compatible with the probe. Use only accessories that are rated for the
application. Substituting other accessories (except those specified in this manual) may create a
shock or burn hazard. Ensure the connections between probe input leads and probe
accessories are secure before connecting them to a voltage source.
Comply with the voltage derating curve. When measuring higher frequency signals, comply
with the Voltage vs. Frequency Derating Curve.
Use only within the operational environment listed. Do not use in wet or explosive
atmospheres.
Do not remove the probe's casing. Touching exposed connections may result in electric
shock.
Keep product surfaces clean and dry.
Handle with care. Probe accessory tips are sharp. They can puncture skin or cause other bodily
injury if not handled properly.
Keep fingers behind the finger guard of the probe accessories.
Do not operate with suspected failures. Before each use, inspect the probe and accessories
for any damage such as tears or other defects in the probe body, cable jacket, accessories, etc.
If any part is damaged, cease operation immediately and sequester the probe from inadvertent
use.
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Operator's Manual
Introduction
The HVD3102 and 3106 high-voltage active differential probes are safe, easy-to-use, and ideally
suited for power electronics measurements. The probes feature:
lDifferential voltage measurement capability in high common-mode (up to 1000Vrms)
environments.
lExceptional common-mode rejection ratio (CMRR) across a broad frequency range
lWide differential voltage range – 1500Vpeak rated and 2000Vpeak before amplifier
saturation to permit capture of short duration overshoots
lHigh offset capability at both 50x and 500x attenuation settings provides maximum
flexibility for capturing gate drive and control signals floating on a 1000Vdc bus
l1% DC and low frequency gain accuracy
lProBus interface with automatic scaling
lAuto Zero capabilities
The HVD3102 probe (25 MHz, 1000Vrms) and HVD3106 probe (120 MHz, 1000Vrms) are ideal
for power electronics applications, where the reference potential is elevated from ground. Each
probe is supplied with a complete set of lead accessories and a soft accessory case. The main
differences between the two probes is the probe bandwidth (25 MHz vs. 120 MHz).
The CMRR for the probes is exceptional out to very high frequencies. This greatly assists in
measurement of signals in the noisy, high common-mode environments common to power
electronics. The high CMRR combined with low probe noise and high offset capability makes the
probes capable of measuring very small control signals floating on high common-mode
voltages.
Probe specifications are provided for using the probe within a 1500Vpeak differential voltage
range. However, the probe can be safely operated above this range. Up to 2000Vpeak, the probe
will display the signal, but the probe specifications cannot be guaranteed. However, in this
range, the probe is operating below the saturation point of the amplifier, and very reasonable
results can be expected. The V/div range for each probe can be set up to 400V/div (3200Vp-p
displayed over all 8 vertical oscilloscope grid divisions).
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HVD3102 and HVD3106 High-Voltage Differential Probes
The probe is calibrated for high precision measurements to within 1% at DC to low frequency
(~10 kHz). This provides for high accuracy of top and base voltage levels of pulse-width
modulated signals. The AutoZero capability permits further measurement precision by allowing
small offset drifts to be calibrated out of the measurement.
With the ProBus interface, the HVD310x becomes an integral part of the oscilloscope. Power is
provided to the probe through the ProBus interface, so there is no need for a separate power
supply or batteries. Attenuation (50x or 500x) is automatically selected based on oscilloscope
gain range (V/div) setting and the offset adjust is unified with that of the oscilloscope. The
sensitivity of the HVD31xx ranges from 100 mV/Div to 400 V/Div, with the maximum available
offset dependent on the V/div setting and the oscilloscope model. In general, Teledyne LeCroy
12-bit High Resolution Oscilloscopes (HRO) and HD4096 High Definition Oscilloscopes (HDO)
provide the most offset capability over the widest range of V/div settings.
Requirements
The HVD3102 and HVD3106 probes are compatible with any Teledyne LeCroy oscilloscope
equipped with the ProBus interface and XStream software version 7.4 or greater.
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Operator's Manual
Probe Kit
The HVD3102 and HVD3106 probes are delivered in a soft accessory case (SAC-01A) with an
Operator's Manual, Certificate of Calibration, and all standard accessories described below.
HVD3102 and HVD3106 Probe Kit
See Replacement Parts for information about ordering replacement accessories.
Adobe portable document format (PDF) copies of this manual are available for free download
from teledynelecroy.com/support/techlib.
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HVD3102 and HVD3106 High-Voltage Differential Probes
Standard Accessories
All accessories feature a 4 mm Banana (female) connector to accept most Banana plugs.
Spade Terminals, PK-HVA-05, QTY 2 (1 ea. red/black). Designed to connect to
terminal strips, posts and screws, the overall length is 63 mm (2.48 inches).
Insulated, 1000 V, CAT III.
WARNING. To avoid injury or death due to electric shock, do not
handle probe input leads connected to the Spade Terminals while
they are connected to a voltage source. Do not use Spade
Terminals as hand-held accessories; they are meant to be used as
a permanent installation in a test set up.
Safety Alligator Clips, PK-HVA-01, QTY 2 (1 ea. red/black). Designed to
reliably grip large components, such as bus bars and large bolts, the overall
length is 92.8 mm (3.65 inches) and the jaw opens to 32 mm (1.26 inch).
Only the lower jaw is conducive; the top jaw is insulating plastic. Insulated,
1000 V, CAT III.
Plunger Hook Clips, PK-HVA-03, QTY 2 (1 ea. red/black). Designed with a flexible stem to
access deep targets in dense environments and a 4.5 mm (0.177 inch) hook to attach to wire
leaded parts. The overall length is 157.6 mm (6.20 inches). Insulated, 1000 V, CAT II.
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Operator's Manual
Plunger Pincer Clips, PK-HVA-02, QTY 2 (1 ea. red/black). Designed with a long, thin, flexible
stem for attaching to hard-to-reach test points, the entire body is fully insulated. The overall
length is 161.6 mm (6.36 inch). The pincers can grab leads, pins and wires up to 4 mm (0.157
inch) in diameter. Insulated, 1000 V, CAT II.
Plunger Alligator Clips, PK-HVA-04, QTY 2 (1 ea. red/black). The clip is designed to securely
grasp thick wires, cables, ground leads, rails, and screw heads. The overall length is 153 mm
(6.02 inches); the jaw opens to 23 mm (0.905 inch) max. Insulated, 1000 V, CAT III.
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HVD3102 and HVD3106 High-Voltage Differential Probes
Voltage Derating for Standard Accessories
Accessory Part Number
Derated Max. Input Voltage for
Combined Probe and Acces-
sory (from either input to
ground)
Safety Alligator Clips PK-HVA-01 1000V CAT III
Plunger Pincer Clips PK-HVA-02 1000V CAT II
Plunger Hook Clips PK-HVA-03 1000V CAT II
Plunger Alligator Clips PK-HVA-04 1000V CAT III
Spade Terminals PK-HVA-05 1000V CAT III
CAUTION. The operating altitude of the HVD3102 and HVD3106 is derated to 2000 m
(6560 ft) when used with the accessories above.
WARNING. The voltage and CAT rating of the probe are derated to the values in the
table above when used with the corresponding accessory.
WARNING. To avoid risk of electric shock or fire, do not exceed either the voltage
rating or category rating. Keep your fingers behind the finger guard of the probe.
Keep the output cable away from the circuits being measured. Use only these
specified accessories.
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Operator's Manual
Specifications
For the current specifications, see the HVD3102 and HVD3106 product pages at
teledynelecroy.com. Below are some key product specifications.
Specifications are subject to change without notice.
Guaranteed Specifications
HVD3102 HVD3106
Bandwidth (probe only) 25 MHz 120 MHz
Risetime 10-90 % 14 ns 2.9 ns
CMRR Test Limits, 23 C 80 db @ 50 Hz
60 db @ 1 MHz
80 db @ 50 Hz
60 db @ 1 MHz
Environmental Characteristics
Temperature, Operating 0 C to 50 C
Temperature, Non-operating - 40 C to 70 C
Relative Humidity, Operating 5% to 80% RH (Non-Condensing)
50% RH above 30 C
Relative Humidity, Non-operating 5% to 95% RH (Non-Condensing)
75% RH above 30 C
45% RH above 40 C
Altitude 3000 m (9842 ft) max. at 25 C
Usage Indoors
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HVD3102 and HVD3106 High-Voltage Differential Probes
HVD3102 Typical Bandwidth
HVD3106 Typical Bandwidth
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Operator's Manual
HVD3102 Typical CMRR Performance
HVD3106 Typical CMRR Performance
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HVD3102 and HVD3106 High-Voltage Differential Probes
Common Mode Rejection Ratio
The ideal differential probe/amplifier would sense and amplify only the differential mode voltage
component and reject the entire common mode voltage component. Real differential amplifiers
are not perfect, and a small portion of the common mode voltage component appears at the
output.
Common Mode Rejection Ratio (CMRR) is the measure of how much the amplifier rejects the
common mode voltage component that appears at the output. CMRR is equal to the differential
mode gain (or normal gain) divided by the common mode gain. Common mode gain is equal to
the output voltage divided by the input voltage when both inputs are driven by only the common
mode signal. CMRR can be expressed as a ratio (e.g., 10,000:1) or implicitly in dB (e.g., 80 dB).
Higher numbers indicate greater rejection (better performance).
The first order term determining the CMRR is the relative gain matching between the +and –
input paths. Obtain high CMRR values by precisely matching the input attenuators in a
differential amplifier. The matching includes the DC attenuation and the capacitance which
determines the AC attenuation. As the frequency of the common mode component increases,
the effects of stray parasitic capacitance and inductance in determining the AC component
become more pronounced. The CMRR becomes smaller as the frequency increases. Therefore,
the CMRR is usually specified in a graph of CMRR versus common mode frequency.
The common mode frequency in these graphs is assumed to be sinusoidal. In real life
applications, the common mode signal is seldom a pure sine wave. Signals with pulse wave
shapes contain frequency components much higher than the repetition rate may suggest. This
makes it very difficult to predict actual performance in the application for CMRR-versus-
frequency graphs. The practical application of these graphs is to compare the relative common
mode rejection performance between different probes and amplifiers.
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Operator's Manual
Input Voltage vs. Frequency and Burn Limit
The Maximum Input Voltage curve (solid line on graph) shows the maximum voltage that can be
applied to the probe inputs without risking damage to the probe. The lower Burn Limit curve
(dashed line on graph) shows the maximum voltage that can be applied to the probe inputs
while the operator is handling the inputs. Handling the inputs while connecting the probe to
active signals above this burn limit could result in injury to the operator.
WARNING. To avoid risk of electric shock or fire, comply with the burn limits of the
derating curve when measuring high-frequency signals with hand-held accessories.
Do not exceed the voltage or category rating of the probe or accessories (whichever
is less). Keep your fingers behind the finger guard of the probe. Keep the output cable
away from the circuits being measured. Use only the specified accessories.
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HVD3102 and HVD3106 High-Voltage Differential Probes
Differential Mode and Common Mode
Differential probes sense the voltage difference that appears between the +and –inputs. This is
referred to as the Differential or Normal Mode voltage. The voltage component that is referenced
to earth and is identical on both inputs is rejected by the amplifier. This is referred to as the
Common Mode voltage and can be expressed as:
Differential Mode Range and Common Mode Range
Differential Mode range is the maximum signal that can be applied between the +and -inputs
without overloading the amplifier, which otherwise would result in clipping or distorting of the
waveform measured by the oscilloscope.
The Common Mode Range is the maximum voltage with respect to earth ground that can be
applied to either input. Exceeding the common mode range can result in unpredictable
measurements. Because the Common Mode signal is normally rejected, and not displayed on
the oscilloscope, the user needs to be careful to avoid accidentally exceeding the common
mode range.
Differential Input Impedance
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