iET HRRS Series Troubleshooting guide

¨PRECISION INSTRUMENTS FOR TEST AND MEASUREMENT ¨
IET LABS, INC.
HRRS 5kV AND 10kV SERIES
High Resistance, 5kV and 10kV
Decade Substituter
User and Service Manual
Copyright © 2021 IET Labs, Inc.
HRRS 5kV and 10kV im/August 2021
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¨PRECISION INSTRUMENTS FOR TEST AND MEASUREMENT ¨
IET LABS, INC.
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i
HRRS 5kV and 10kV Series
Revision History
Revision Description
November 2017 Initial release
February 2021 new pictures and reference to shielding when in use
WARRANTY
We warrant that this product is free from defects in material and workmanship and, when properly used,
will perform in accordance with applicable IET speci!cations. If within one year after original shipment,
it is found not to meet this standard, it will be repaired or, at the option of IET, replaced at no charge when
returned to IET. Changes in this product not approved by IET or application of voltages or currents greater
than those allowed by the speci!cations shall void this warranty. IET shall not be liable for any indirect,
special, or consequential damages, even if notice has been given to the possibility of such damages.
THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED,
INCLUDING BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF MERCHANTABILITY OR
FITNESS FOR ANY PARTICULAR PURPOSE.
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HRRS 5kV and 10kV Series
SAFETY PRECAUTIONS
The following general safety precautions must be observed during all phases of operation, service,
and repair of this instrument. Failure to comply with these precautions or with speci•c WARNINGS
elsewhere in this manual may impair the protection provided by the equipment. Such noncompliance
would also violate safety standards of design, manufacture, and intended use of the instrument.
IET Labs assumes no liability for the customer’s failure to comply with these precautions.
The HRRS complies with EN 60477.
If an instrument is marked CAT I (IEC Measurement Category I), or it is not marked with a
measurement category, its measurement terminals must not be connected to line-voltage mains.
The HRRS is an indoor use product.
DANGEROUS PROCEDURE WARNINGS
Comply with all WARNINGS - Procedures throughout in this manual and instructions on the
instrument prevent you from potential hazard. These instructions contained in the warnings must
be followed.
BEFORE APPLYING POWER
Verify that all safety precautions are taken. Make all connections to the instrument before applying
power. Note the instrument’s external markings described under “Safety Symbols”.
GROUND THE INSTRUMENT
This is a Safety Class I instrument. To minimize shock hazard, the instrument chassis and cabinet
must be connected to an electrical ground. The power terminal and the power cable must meet
International Electrotechnical Commission (IEC) safety standards.
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HRRS 5kV and 10kV Series
SAFETY PRECAUTIONS CONTINUED
CAUTION
• DO NOT Operate in an Explosive Atmosphere
• Do not operate the instrument in the presence of infl
ammable gasses or fumes
• Operation of any electrical instrument in such an environment clearly constitutes a safety hazard
• Use Caution around live circuits and whenever hazardous voltages > 45 V are present
• Operators must not remove instrument covers
• Component replacement and internal adjustments must be made by qualifi
ed maintenance
personnel only
• DO NOT substitute parts or modify the instrument
• When working with high voltages; post warning signs, train personnel and keep unauthorized personnel
away.
Do not apply any voltage or currents to the terminals of the instrument in excess of the maximum limits
indicated in the specifications section of this manual.
To avoid the danger of introducing additional hazards, do not install substitute parts or perform unauthorized
modifications to the instrument.
Return the instrument to an IET Labs for service and repair to ensure that safety features are maintained
in operational condition.
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HRRS 5kV and 10kV Series
Safety Symbols
General de•nitions of safety symbols used on the instrument or in manuals are listed below.
Caution symbol: the product is marked with this symbol when it is necessary for the user to
refer to the instruction manual.
Hazardous voltage symbol: the product is marked with this symbol when high voltage maybe
present on the product and an electrical shock hazard can exist.
Indicates the grounding protect terminal, which is used to prevent electric shock from the leakage
on chassis. The ground terminal must connect to earth before using the product
Direct current.
Alternating current.
Frame or chassis terminal. A connection to the frame (chassis) of the equipment which
normally includes all exposed metal structures.
On supply.
O• supply.
Hot surface. Avoid contact. Surfaces are hot and may cause personal injury if touched.
Disposal
Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC
This product complies with the WEEE Directive (2002/96/EC) marking requirements.
The affixed label indicates that you must not discard this electrical/ electronic product in domestic
household waste.
Product Category: With reference to the equipment types in the WEEE directive Annex 1, this product
is classi•ed as a “Monitoring and Control instrumentation” product.
Do not dispose of electrical appliances as unsorted municipal waste, use separate collection facilities.
Contact your local government for information regarding the collection systems available. If electrical
appliances are disposed of in land•lls or dumps, hazardous substances can leak into the groundwater
and get into the food chain, damaging your health and well-being.
When replacing old appliances with new one, the retailer is legally obligated to take back your old ap-
pliances for disposal.
Proposition 65 Warning for California Residents
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.
This product may contain chemicals known to the State of California to cause cancer, birth defects, or
other reproductive harm
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HRRS 5kV and 10kV Series
Table of Contents
Chapter 1 Introduction
1.1 Overview............................................................................................................... 1
Chapter 2 Specifications
2.1 Speci!
cations ........................................................................................................ 2
2.2 Ordering Information ............................................................................................ 3
Chapter 3 Operation
3.1 Initial Inspection and Setup .................................................................................. 5
3.2 Dial Setting ........................................................................................................... 5
3.3 Environmental Conditions .................................................................................... 5
3.4 Storage .................................................................................................................. 5
Chapter 4 Maintenance
4.1 Maintainability and Reliability ............................................................................. 6
4.2 Preventive Maintenance........................................................................................ 6
4.3 Veri!cation of Performance .................................................................................. 6
4.3.1 Calibration Interval..................................................................................... 6
4.3.2 General Considerations............................................................................... 6
4.3.3 Calibration Procedure ................................................................................. 7
4.4 Schematic.............................................................................................................. 7
4.5 Replaceable Parts .................................................................................................. 8
Figures and Tables
Figure 1-1: Example of an HRRS-5kV unit with 7 decades ...................................1
Figure 1-2: Example of an HRRS-10kV unit with 4 decades ..................................1
Figure 2-1: Typical operating guide .........................................................................4
Figure 4-1: HRRS 5kV and 10kV Series Schematic Diagram ................................7
Table 4-1: Replaceable Parts .................................................................................. 8
Figure 4-2: Replaceable Parts ................................................................................8
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HRRS 5kV and 10kV Series
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HRRS 5kV and 10kV Series
Introduction
Chapter 1
INTRODUCTION
1.1 Overview
The High Resistance, 5kV and 10 kV Decade
Substituters (Figure 1-1 and Figure 1-2) is a family
of instruments that answers the need of the calibration
and test community for decades and working stan-
dards that go up to 10 T•, o•ering a broad choice of
high-range, excellent performance resistance sources.
High values of resistance are available for use at high
voltages, without sacri•cing accuracy, stability, and
temperature and power coe•cients of resistance.
The HRRS-5kV/HRRS-10kV units employ state-
of-the-art precision resistors. They are designed
speci•cally for operation at high voltage, with very
low leakage to minimize degradation of accuracy.
The standard models o•er a choice of one to nine
decades. The panels are clearly labeled showing the
step size and maximum allowable applied input for
each decade. Custom requirements outside of the
standard models can be satis•ed.
To ensure low leakage, the connection terminals are
insulated with Kel-F high-resistance, non-moisture-
absorbing material.
With a resolution as low as 10 • and a maximum
available resistance of 10 T•, these High-Resistance,
High-Voltage units may be used for exacting preci-
sion high-value resistance applications that require
voltages of up to 5kV or 10 kV.
Applications include calibration of meters and meg-
ohmmeters, and checking of electrochemical and bio-
medical sensors and instruments. These instruments
are useful wherever high resistances are required,
such as in testing high-impedance ampli•ers and the
insulation of low-power circuits.
The HRRS 5kV and 10kV series complement the
HARS series which provides resistance steps as low
as 1 m•. The units may be rack-mounted to serve
as components in measurement and control systems.
Figure 1-1: Example of an HRRS-5kV unit
with 7 decades
Figure 1-2: Example of an HRRS-10kV unit
with 4 decades
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HRRS 5kV and 10kV Series
Specifications
Zero resistance:
<10 m• per decade
Environmental conditions:
Operating Conditions: 10°C to 40°C; <50% RH
Storage conditions: -40°C to 70°C
Terminals:
Two !ve-way binding posts on 2 special, low-
leakage, Kel-F insulating sockets, and one metal
ground binding post electrically connected to the
case
Resistance
per step
Total
decade
resistance
Accuracy **
18-28°C; <50% RH HRRS-5kV HRRS-10kV Temperature
coefficient
(±ppm/°C)
Voltage
coefficient
(±ppm/V)
Stability
(±ppm/
yr)
Resistor type
Q B F
Max voltage
per step
(V)
Maximum
voltage
(V)
Max voltage
per step
(V)
Maximum
voltage
(V)
10 W100 Ω ±(0.01%+2 mΩ) ±(0.03%+2 mΩ) ±(0.10%+2 mΩ) 2.5 25 2.5 25 15 - 10
Wirewound,
non-inductive
100 W1 kΩ ±(0.01%+2 mΩ ±(0.03%+2 mΩ) ±(0.10%+2 mΩ) 8 80 8 80 5 - 10
1 kW10 kΩ ±0.01% ±0.03% ±0.10% 23 230 23 230 5 - 10
10 kW100 kΩ ±0.01% ±0.03% ±0.10% 70 700 70 700 5 - 10
100 kW1 MΩ ±0.01% ±0.03% ±0.10% 230 2300 230 2300 5 - 10
1 MW10 MΩ ±0.01% ±0.03% ±0.10% 1000 5000 1000 10,000 15 <1 25
10 MW100 MΩ ±0.03% ±0.10% ±1% 5000 5000 5000
(*10,000) 10,000 25 <1 50
High-voltage
film
100 MW1 GΩ ±0.10% ±0.20% ±1% 5000 5000 10,000 10,000 25 1 100
1 GW10 GΩ ±0.20% ±0.50% ±1% 5000 5000 10,000 10,000 25 1 500
10 GW100 GΩ ±0.50% ±1% ±1% 5000 5000 10,000 10,000 25 2 500
100 GW1 TΩ ±0.50% ±1% ±1% 5000 5000 10,000 10,000 100 5 500
1 TW10 TΩ ±3% ±5% ±10% 5000 5000 10,000 10,000 300 <20 (10 ppm
typical) 500
*To apply up to 10 kV at 10 MΩ, set the 1 MΩ decade to its “10” position.
**
Tested at low voltages except >10 MΩ at ≤ 200 V (Fluke 8508A HiV mode), ≥ 100 MΩ at 1000 V
Chapter 2
SPECIFICATIONS
For convenience to the user, the pertinent speci!cations are given in an OPERATING GUIDE a"xed to the
case of the instrument. Figure 2-1 shows a typical example.
2.1 Specifications
Mechanical:
Model Dimensions
(behind panel)
Weight
(nominal)
3-4 Decade
Benchtop
43.2 cm W x 13.33 cm H x 13.46 cm D
(17" x 5.25" x 5.3")
3.4 kg
(7.5 lbs)
5-6-7 Decade
Benchtop
48.3 cm W x 22.2 cm H x 16.38 cm D
(19" x 8.75" x 6.45")
7.7 kg
(17 lbs)
8-9 Decade
Benchtop
43.2 cm W x 31 cm H x 16.38 cm D
(17" x 12.25" x 6.45")
7.7 kg
(17 lbs)
3-4 Decade
Rack mount
48.3 cm W x 13.33 cm H x 13.46 cm D
(19" x 5.25" x 5.3")
3.4 kg
(7.5 lbs)
5 to 9 Decade
Rack mount
48.3 cm W x 31 cm H x 16.38 cm D
(19" x 12.25" x 6.45")
7.7 kg
(17 lbs)
-WT Case 50.2 cm W x 40 D x 18.8 H
(19.78" x 15.77" x 7.41")
9.1 kg
(20 lbs)
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HRRS 5kV and 10kV Series
Specifications
Model Total resistance Number of
decades Resolution
HRRS-*-3-10k-** 11.1 MΩ 3 10 kΩ
HRRS-*-3-100k-** 111 MΩ 3 100 kΩ
HRRS-*-3-1M-** 1.11 GΩ 3 1 MΩ
HRRS-*-3-10M-** 11.1 GΩ 3 10 MΩ
HRRS-*-3-100M-** 111 GΩ 3 100 MΩ
HRRS-*-3-1G-**-WT 1.11 TΩ 3 1 GΩ
HRRS-*-3-10G-**-WT 11.1 TΩ 3 10 GΩ
HRRS-*-4-1k-** 11.11 MΩ 4 1 kΩ
HRRS-*-4-10k-** 111.1 MΩ 4 10 kΩ
HRRS-*-4-100k-** 1.111 GΩ 4 100 kΩ
HRRS-*-4-1M-** 11.11 GΩ 4 1 MΩ
HRRS-*-4-10M-** 111.1 GΩ 4 10 MΩ
HRRS-*-4-100M-**-WT 1.111 TΩ 4 100 MΩ
HRRS-*-4-1G-**-WT 11.11 TΩ 4 1 GΩ
HRRS-*-5-100-** 11.111 MΩ 5 100 Ω
HRRS-*-5-1k-** 111.11 MΩ 5 1 kΩ
HRRS-*-5-10k-** 1.111 1 GΩ 5 10 kΩ
HRRS-*-5-100k-** 11.111 GΩ 5 100 kΩ
HRRS-*-5-1M-** 111.11 GΩ 5 1 MΩ
HRRS-*-5-10M-**-WT 1.111 1 TΩ 5 10 MΩ
HRRS-*-5-100M-**-WT 11.111 TΩ 5 100 MΩ
HRRS-*-6-10-** 11.111 1 MΩ 6 10 Ω
HRRS-*-6-100-** 111.111 MΩ 6 100 Ω
HRRS-*-6-1k-** 1.111 11 GΩ 6 1 kΩ
HRRS-*-6-10k-** 11.111 1 GΩ 6 10 kΩ
HRRS-*-6-100k-** 111.111 GΩ 6 100 kΩ
HRRS-*-6-1M-**-WT 1.111 11 TΩ 6 1 MΩ
HRRS-*-6-10M-**-WT 11.111 1 TΩ 6 10 MΩ
Model Total resistance Number of
decades Resolution
HRRS-*-7-10-** 111.111 1 MΩ 7 10 Ω
HRRS-*-7-100-** 1.111 111 GΩ 7 100 Ω
HRRS-*-7-1k-** 11.111 11 GΩ 7 1 kΩ
HRRS-*-7-10k-** 111.111 1 GΩ 7 10 kΩ
HRRS-*-7-100k-**-WT 1.111 111 TΩ 7 100 kΩ
HRRS-*-7-1M-**-WT 11.111 11 TΩ 7 1 MΩ
HRRS-*-8-10-** 1,111.111 1 MΩ 8 10 Ω
HRRS-*-8-100-** 11.111 111 GΩ 8 100 Ω
HRRS-*-8-1k-** 111.111 11 GΩ 8 1 kΩ
HRRS-*-8-10k-**-WT 1.111 111 1TΩ 8 10 kΩ
HRRS-*-8-100k-**-WT 11.111 111 1 TΩ 8 100 kΩ
HRRS-*-9-10-** 11.111 111 1 GΩ 9 10 Ω
HRRS-*-9-100-** 111.111 111 GΩ 9 100 Ω
HRRS-*-9-1k-**-WT 1.111 111 11 TΩ 9 1 kΩ
HRRS-*-9-10k-**-WT 11.111 111 1 TΩ 9 10 kΩ
*To specify accuracy grade, replace * with “Q,” “B,” or “F” as required.
**To specify voltage, replace ** with either “5kV” or “10kV.”
Remove -WT to specify metal housing. (not recommended for humid environments)
Options
-WT Watertight case
-RM: Rack mountable case for standard 19” rack
-K: Kelvin-type 4-terminal posts
-RO: Rear output
2.2 Ordering Information
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4
HRRS 5kV and 10kV Series
Specifications
Figure 2-1: Typical operating guide
IET LABS, INC.
HRRS-5kV lbl/01-17-2013
Observe all safety rules when working with high voltages or line voltages. Connect the (G) terminal to earth ground in order to maintain the case at a safe voltage. Whenever hazardous
voltages (> 45 V) are used, take all measures to avoid accidental contact with any live components: a) Use maximum insulation and minimize the use of bare conductors. b) Remove
power when adjusting switches. c) Post warning signs and keep personnel safely away.
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CONSULT INSTRUCTION MANUAL FOR PROPER INSTRUMENT OPERATION
WARNING
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CAGE CODE: 62015
MODEL: HRRS-B-9-1K-5kV SN: C1-1250517
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HRRS 5kV and 10kV Series
Operation
Chapter 3
OPERATION
and a setting of 10-10-10-l0-10.10 Wbecomes:
10 1 0 0 0 0 0.0
10 1 0 0 0 0.0
10 1 0 0 0.0
10 1 0 0.0
10 1 0.0
.10 1.0
TOT 1 1 1 1 1 1.0
3.3 Environmental Conditions
For optimal accuracy, the decade box should be used
in an environment of 23°C. It should be allowed to
stabilize at that temperature for 24 hours after any
signi!cant temperature variation.
Temperature coe"cients are listed and can be used
for temperatures other than 23°C.
Humidity should be maintained at <50% RH. This is
especially important if high resistances above 1 G#
are involved. Prolonged expose to high humidity
can cause electrical leakage. This leakage causes
the resistance to be lower than the calibrated value.
The -WT version utilizes a watertight case to mini-
mize e$ect of humidity when the case is closed. The
case should be kept closed when not in use.
3.1 Initial Inspection and Setup
This instrument was carefully inspected before ship-
ment. It should be in proper electrical and mechanical
order upon receipt.
An OPERATING GUIDE is attached to the case
of the instrument to provide ready reference to
speci!cations.
3.2 Dial Setting
Whenever the dials are used in positions 0-9, the
resulting resistance is read directly. Both the decimal
point and the steps are clearly marked on the panel.
For additional &exibility and range, each decade
provides a “10” position setting. This “10” position
on any one decade equals the “1” position on the next
higher decade. It adds about 11% to the nominal total
decade resistance.
To determine the resistance obtained when one or
more “10” settings are used, simply add “1” to the
next higher decade. For example, a setting of 3-6-
10-0-10 # becomes:
3 3 0 0 0 0
6 6 0 0 0
10 1 0 0 0
0 0 0
10 1 0
TOT 3 7 0 1 0
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HRRS 5kV and 10kV Series
Operation
3.4 Electromagnetic Interference
The HRRS series are resistant to electromagnetic
interference (EMI) because of their metal enclosure
except for the -WT version.
EMI can be a signi•cant source of error when measur-
ing high resistance values.
The green GND binding post on all HRRS Decade
Resistors should be connected to earth ground to
minimize errors due to EMI.
When using the -WT version the GND binding post
should be connected to earth ground however since
the chassis is plastic and not conductive, EMI can
still cause errors during measurement.
Use of a faraday cage is recommended to minimize
EMI especially on the HRRS-WT version. The con-
struction can be as simple as a metal box or enclosure
that is connected to earth ground that is of su•cient
size so that the HRRS-WT can easily •t inside.
A faraday cage can also easily and inexpensively be
build using copper mesh over a frame. IET Labs
uses a similar faraday cage during calibration of the
HRRS series.
A picture of the a HRRS-WT in our faraday cage can
be seen in Figure 3-1
There are also various pre-manufactured faraday
cages such as THORLABS FAR series. We are not
endorsing this brand but showing options for a com-
mercial o•-the-shelf faraday enclosure.
3.5 Storage
If this instrument is to be stored for any lengthy period
of time, it should be sealed in plastic and stored in a
dry location. It should not be subjected to temperature
extremes beyond the speci•cations. Extended expo-
sure to such temperatures can result in an irreversible
change in resistance, and require recalibration.
Figure 3-1: HRRS-WT in faraday enclosure
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HRRS 5kV and 10kV Series
Operation
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HRRS 5kV and 10kV Series
Maintenance
Chapter 4
MAINTENANCE
4.1 Maintainability and Reliability
It is possible to maintain models HRRS-5kV and
HRRS-10kV inde•nitely. They are reliable due to
their closed design and sealed switches and resistors.
The units are resistant to electromagnetic interfer-
ence (EMI) because of their metal enclosure with the
exception of the -WT version.
4.2 Preventive Maintenance and
Cleaning
Keep the units in a clean environment. This will help
prevent possible contamination.
The front panel should be periodically cleaned to
eliminate any leakage paths from near or around the
binding posts. To clean the front panel:
Wipe the front panel clean using alcohol and a
lint-free cloth.
No other maintenance is required.
4.3 Verification of Performance
4.3.1 Calibration Interval
The HRRS 5kV and 10kV Series instruments should
be veri•ed for performance at a calibration interval of
twelve (12) months. This procedure may be carried
out by the user if a calibration capability is available,
by IET Labs, or by a certi•ed calibration laboratory.
If the user should choose to perform this procedure,
then the considerations below should be observed.
4.3.2 General Considerations
It is important, whenever testing the HRRS 5kV and
10kV Series units, to be aware of the capabilities and
limitations of the test instruments used. A resistance
bridge may be employed, and there are direct-reading
resistance meters or digital multimeters available
that can verify the accuracy of these units, especially
when used in conjunction with standards that can
serve to con•rm or improve the accuracy of the test-
ing instrument
Such test instruments must have a 4:1 TUR capabil-
ity for each value calibrated. Note that the accuracy
varies for di!erent decades. A number of commercial
bridges and meters exist that can perform this task;
consult IET Labs.
It is important to allow both the testing instrument
and the HRRS-5kV/10kV Substituter to stabilize for
a number of hours at the nominal operating tempera-
ture of 23°C, and at nominal laboratory conditions of
humidity. There should be no temperature gradients
across the unit under test.
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HRRS 5kV and 10kV Series
Maintenance
4.3.3 Calibration Procedure
To calibrate the HRRS-5kV/10kV unit, proceed as
follows
1. Con•
rm that the leakage resistance between
either binding post and the case ground is
>106times the highest unit resistance, but
may be as low at 1 TΩ.
If this is not obtained, clean the area
around the binding posts as described in
Section 4.2.
2. Determine the allowable upper and lower
limits for each resistance setting of each
decade based on the specified accuracy (See
Specifications on page 2).
3. Confirm that the resistances fall within these
limits.
If any resistances fall outside thee limits,
the associated switch assembly may
require service or replacement.
WARNING
Connect the GND terminal to earth
or other suitable ground in order to
maintain the case at a safe voltage.
W h en eve r h a za rdo u s vol ta g es
(>45 v) are used, take all measures to
avoid accidental contact with any live
components.
U s e m a x i mu m i n s u l a t i o n a n d
minimize the use of bare conductors.
REMOVE POWER WHEN SETTING
SWITCHES.
Po s t w a r n i n g s i g n s a n d k e e p
personnel safely away.
4.4 Schematic
Figure 4-1 shows a schematic of an HRRS-5kV/10kV
unit.
Figure 4-1: HRRS 5kV and 10kV Series
Schematic Diagram
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HRRS 5kV and 10kV Series
Maintenance
4.5 Replaceable Parts
Model Ref IET part number Description
1 BP-1000-RD Binding Post, Red
2 BP-1000-BK Binding Post, Black
3 BP-1000-BL Binding Post, Blue
4 BP-1000-GN Binding Post, Green
5 HARS-X-4300-KNB Knob Assembly
Not Shown HARS-X-3100 Foot
Not Shown HRRS-*-SW-10-** 10 •/step Decade Switch Assembly
Not Shown HRRS-*-SW-100-** 100 •/step Decade Switch Assembly
Not Shown HRRS-*-SW-1k-** 1 k•/step Decade Switch Assembly
Not Shown HRRS-*-SW-10k-** 10 k•/step Decade Switch Assembly
Not Shown HRRS-*-SW-100k-** 100 k•/step Decade Switch Assembly
Not Shown HRRS-*-SW-1M-** 1 M•/step Decade Switch Assembly
Not Shown HRRS-*-SW-10M-** 10 M•/step Decade Switch Assembly
Not Shown HRRS-*-SW-100M-** 100 M•/step Decade Switch Assembly
Not Shown HRRS-*-SW-1G-** 1 G•/step Decade Switch Assembly
Not Shown HRRS-*-SW-10G-** 10 G•/step Decade Switch Assembly
Not Shown HRRS-*-SW-100G-** 100 G•/step Decade Switch Assembly
Not Shown HRRS-*-SW-1T-** 1 T•/step Decade Switch Assembly
*To specify accuracy grade, replace * with “Q,” “B,” or “F” as required.
**To specify voltage, replace ** with either “5kV” or “10kV.”
Table 4-1: Replaceable Parts
Figure 4-2: Replaceable Parts
1
2
3
4
5
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