IET GenRad 1433 Decade Resistor Owner’s Manual

IET GenRad 1433 Decade ResistorGenRad 1433 Decade Resistor

Product Information

• The 1433 SERIES High-Accuracy Decade Resistor is a precision instrument manufactured by IET LABS, INC. It is designed to provide accurate resistance values for laboratory applications. The product is part of the 1433 Series and is effective for serial numbers beginning with E. It is covered by a warranty that is in lieu of all other warranties, expressed or implied, including any implied warranty of merchantability or fitness for any particular purpose.
• The product has undergone revisions, with the latest revision being on May 5, 2023. It complies with safety standards and precautions outlined in the user manual to ensure user protection.
  The 1433-XX model complies with INSTALLATION CATEGORY I and POLLUTION DEGREE 2 in IEC61010-1. It has also been designed to meet the requirements of IEC-60477-1:2022 Laboratory resistors Part 1 Laboratory dc resistors. The instrument should only be used indoors and must not be connected to line-voltage mains if marked with CAT I (IEC Measurement Category I) or if it is not marked with a measurement category.
• The product features safety symbols that indicate caution, hazardous voltage, grounding protection, direct current, alternating current, frame or chassis terminal, on/off supply, and hot surface. These symbols are used to convey important information and instructions to the user for safe operation.
• Additionally, the product complies with the Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC. This means that it should not be discarded in domestic household waste and falls bunder the category of Monitoring and Control instrumentation product as per the WEEE directive Annex 1.

Product Usage Instructions

Before using the 1433 SERIES High-Accuracy Decade Resistor, it is important to follow the safety precautions outlined in the user manual:

• Read and comply with all safety precautions and warnings provided in the manual.
• Ensure that the instrument is installed and used according to the specified INSTALLATION CATEGORY and POLLUTION DEGREE.
• Verify that the instrument is suitable for indoor use only.
• Do not connect the measurement terminals to line-voltage mains if marked with CAT I or if not marked with a measurement category.
• Take necessary precautions to prevent potential hazards as described in the warnings throughout the manual.
• Ensure all connections to the instrument are made before applying power.
• Ground the instrument by connecting its chassis and cabinet to an electrical ground to minimize shock hazard. The maximum voltage between Hi and Lo binding post terminals and chassis ground should not exceed 2000 V peak.
• Refer to the safety symbols provided on the instrument or in the manual for additional guidance on safe usage. These symbols convey important information regarding caution, hazardous voltage, grounding protection, direct current, alternating current, frame or chassis terminal, on/off supply, and hot surface.
• When disposing of the product, comply with the Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC. Do not discard the product in domestic household waste. Instead, follow proper disposal procedures according to local regulations for electrical and electronic products classified as Monitoring and Control instrumentation products.

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 specifications. 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 specifications 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.

Revision History
Revision	Description
May 5, 2023	Added 1433-10A and safety symbols and precautions, reference to IEC60477-1 for laboratory resistors

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 specifi 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 1433-XX complies with INSTALLATION CATEGORY I as well as POLLUTION DEGREE 2 in IEC61010-1 .
• The 1433-XX has been designed to meet the requirements of IEC-60477-1:2022 Laboratory resistors Part 1 Laboratory dc resistors.
• 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 1433-XX 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

• To minimize shock hazard, the instrument chassis and cabinet can be connected to an electrical ground. The maximum voltage between Hi and Lo binding post terminals and chassis ground should not exceed 2000 V peak .

Safety Symbols

• General definitions 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.
• Off supply.
• Hot surface. Avoid contact. Surfaces are hot and may cause personal injury if touched.
• Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC
• This product complies with the WEEE Directive (2002/96/EC) marking requirements.
• The affi xed 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 classified 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 landfills 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 appliances 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

OBSERVE ALL SAFETY RULES

• WHEN WORKING WITH HIGH VOLTAGES OR LINE VOLTAGES.
• Dangerous voltages may be present inside this instrument. Do not open the case Refer servicing to qualified personnel
• HIGH VOLTAGES MAY BE PRESENT AT THE TERMINALS OF THIS INSTRUMENT WHENEVER HAZARDOUS VOLTAGES (> 45 V) ARE USED, TAKE ALL MEASURES TO AVOID ACCIDENTAL CONTACT WITH ANY LIVE COMPONENTS.
• USE MAXIMUM INSULATION AND MINIMIZE THE USE OF BARE CONDUCTORS WHEN USING THIS INSTRUMENT.
• Use extreme caution when working with bare conductors or bus bars.
• WHEN WORKING WITH HIGH VOLTAGES, POST WARNING SIGNS AND KEEP UNREQUIRED PERSONNEL SAFELY AWAY.

CAUTION

• DO NOT APPLY ANY VOLTAGES OR CURRENTS TO THE TERMINALS OF THIS INSTRUMENT IN EXCESS OF THE MAXIMUM LIMITS INDICATED ON
• THE FRONT PANEL OR THE OPERATING GUIDE LABEL.

INTRODUCTION

Product Overview

• The 1433 Decade Resistors are a family of instruments providing a very broad choice of high-performance resistance sources. Any number of decades from one to eleven is available.
• The 1433 is a precision resistance source with excellent characteristics of stability, temperature coefficient, power coefficient, and frequency response.
• There are over 30 models available covering a wide resistance range from 1 mW to over 111 MW. The 1433 Series employs stable, very-low-resistance switches with silver-alloy contacts. A special design keeps zero-resistance to less than 1 mW per decade. Self-cleaning keeps the silver contacts from becoming tarnished when unused, or when only low currents are passed through them. This is most often the case when only minute test currents are drawn by digital multimeters or other test instruments. Contact resistance is stable and remains low and repeatable.
• The dials, marked “0” to “10”, off er smooth rotation from position to position with no stops. Each dial has an overlap “10” position for maximum convenience and fl exibility in setting and adjusting resistance values. The resistance per step and maximum cur-rent of each dial are clearly shown on the front panel. Electrical shielding is provided by an attractive aluminum cabinet and front panel. The resistance elements have no electrical connection to the cabinet and panel; a separate shield terminal is provided.
• High-quality gold-plated, tellurium-copper binding posts serve to minimize the thermal emf effects which can introduce errors into dc resistance measurements. All other conductors within the instrument, as well as the solder employed, contain no metals or junctions that contribute to thermal emf problems.
• With a minimum resistance as low as 1 mW and a maximum available resistance of over 111 MW, the 1433 series may be used for exacting precision measurement applications requiring high accuracy, good stability, and low zero-resistance. They can be used as components of dc and ac bridges, for calibration, as transfer standards, and as RTD simulators.
• The 1433 Series may be rack-mounted to serve as components in measurement and control systems.
• This series is part of a family of resistance substituters suitable for filling many engineering and testing needs. Consult IET for:
• HPRS High-power substituters – up to >400 W HRRS High-resistance substituters – to 1 TW RTD simulators
• HARS-LX Laboratory-standard-grade substituters – to 1 ppm accuracy
• PRS Programmable substituters – IEEE-488 or BCD; SCPI protocol.

SPECIFICATIONS

For the convenience of the user, the pertinent specifi cations are given in an OPERATING GUIDE a ffi xed to the case of the instrument.

Decade Specifications

Resistance per step	Total decade resistance	Max current	Max voltage (per step)	Max power (per step)	Stability (±ppm/yr)	Long-term stability (±ppm/3 yrs)	Temperature coefficient (±ppm/°C)	Resistor type
1 mΩ	10 mΩ	8.0 A	5 mV	0.04 W	50	75	50	Resistance wire
10 mΩ	100 mΩ	4.0 A	40 mV	0.16 W	50	75	20
100 mΩ	1 Ω	1.6 A	0.16 V	0.25 W	50	75	20
1 Ω	10 Ω	0.8 A	0.8 V	0.6 W	20	25	20	Wirewound, non- inductive
10 Ω	100 Ω	0.25 A	2.5 V	0.6 W	20	25	15
100 Ω	1 kΩ	80 mA	8 V	0.6 W	20	25	5
1 kΩ	10 kΩ	23 mA	23 V	0.5 W	20	25	5
10 kΩ	100 kΩ	7 mA	70 V	0.5 W	20	25	5
100 kΩ	1 MΩ	2.3 mA*	230 V*	0.5 W*	20	25	5
1 MΩ	10 MΩ	0.7 mA*	700 V*	0.5 W*	20	25	5
10 MΩ	100 MΩ	0.1 mA*	1000 V*	0.1 W*	50	100	10	Metal oxide film

• Subject to maximum of 2000 V to case
• Accuracy:
  • ≤1 MΩ decades: ±(0.01% + 2 mΩ)
  • 10 MΩ decades: ±0.03% after subtraction of zero resistance, at 23°C; traceable to SI
    Zero resistance:
• ≤1 MΩ decades: <1 mΩ per decade at dc
  • 10 MΩ decade: ≈3 mΩ at dc
• Max voltage to case: 2000 V peak
  • Terminals:
• 3 Gold-plated, 5-way, tellurium-copper binding posts with low thermal emf and low resistance. Rear outputs are available as an option.
  • K Option: Kelvin connection to is available as an option with 5 binding posts
• Typical Value of Zero Impedance:
  • <0.001 Ω/decade at 1 Hz
  • 0.04 Ω/decade at 1 MHz
• Proportional to square root of frequency above 100 kHz
• Switch capacitance:
  • < 1 pF between contacts
• Zero Inductance (Lo):
  • 0. 1 μH/decade + 0.2 μH.
• Switches:
• Continuous rotation
  • 11 positions marked “0”-”10”
• Multiple solid silver-alloy contacts
  • Environmental conditions:
• Operating: 10°C to 40°C
  • Storage: -40°C to 70°C
• Humidity: <80% RH
  • Supplied with unit:
• Instruction manual
  • Calibration Certifi cate

Mechanical

Model	Dimensions	Weight
3 decade	31 cm W x 8.9 cm H x 10.2 cm D (12.2″ x 3.5″ x 4″)	1.7 kg 3.8 lb
4-5 decade	37.6 cm W x 8.9 cm H x 10.2 cm D (14.8″ x 3.5″ x 4″)	2.0 kg 4.3 lb
6-7 decades	43.9 cm W x 8.9 cm H x 10.2 cm D (17.3″ x 3.5″ x 4″)	2.4 kg 5.3 lb
8-9 decades	48.3 cm W x 17.8 cm H x 17.8 cm D (19″ x 7″ x 7″)	3.5 kg 7.7 lb
10-11 decades		3.7 kg 8.1 lb

Ordering Information:

Model	Total resistance	Number of decades	Resolution	Historic GR model numbers
1433-01	1.11 O	3	0.001 O
1433-00	111.1 O	4	0.01 O	1433-U
1433-02	1.111 kO	4	0.1 O	1433-K
1433-04	11.11 k O	4	1 O	1433-J
1433-06	111.1 k O	4	10 O	1433-L
1433-08	1.111 MO	4	100 O	1433-Q
1433-09	11.11 MO	4	1 kO
1433-09A	111.1 MO	4	10 kO
1433-10A	111.11 O	5	0.001 O
1433-10	1.1111 kO	5	0.01 O	1433-T
1433-12	11.111 kO	5	0.1 O	1433-N
1433-14	111.11 kO	5	1 O	1433-M
1433-16	1.1111 M O	5	10 O	1433-P
1433-18	11.111 MO	5	100 O	1433-Y
1433-18A	111.11 MO	5	1 kO
1433-19	1.111 11 kO	6	0.001 O
1433-20	11.1111 kO	6	0.01 O	1433-W
1433-22	111.111 kO	6	0.1 O	1433-X
1433-24	1.111 11 MO	6	1 O	1433-B
1433-26	11.1111 MO	6	10 O	1433-Z
1433-27	111.111 MO	6	100 O
1433-28	11.111 11 kO	7	0.001 O
1433-29	111.1111 k O	7	0.01 O	1433-F
1433-31	1.111 111 MO	7	0.1 O	1433-G

Model	Total resistance	Number of decades	Resolution	Historic GR model numbers
1433-33	11.111 11 MO	7	1 O	1433-H
1433-34	111.1111 MO	7	10 O
1433-35	111.111 11 kO	8	0.001 O
1433-36	1.111 111 1 MO	8	0.01 O
1433-37	11.111 111 MO	8	0.1 O
1433-38	111.111 11 MO	8	1 O
1433-39	1.111 111 11 MO	9	0.001 O
1433-39A	11.111 111 1 MO	9	0.01 O
1433-39B	111.111 111 MO	9	0.1 O
1433-40A	11.111 111 11 MO	10	0.001 O
1433-40	111.111 111 1 MO	10	0.01 O
1433-41	111.111 111 11 MO	11	0.001 O

OPTIONS:

• 1433-XX-RM: Rack mount front panel
  • 1433-XX-RO: Rear output binding posts
• 1433-XX-K: Kelvin-type 4-terminal posts

1433 SERIES PRECISION DECADE RESISTORS

Resistance per step	Total deacde resistance	Max current	Max voltage	Power per/step	Stability	Long-term stability	Temp. coeffieient	Resistor type
1 mn	10 mO	8.0 A	5 mV	0.04 W	±50 ppm/yr	±75 ppm/3 yrs	± 50 ppm/°C	Resistance Wire
10 mn	100 mO	4.0 A	40 mV	0.16 W	±50 ppm/yr	±75 ppm/3 yrs	± 20 ppm/°C
100 mn	1 O	1.6 A	0.16 V	0.25 W	±50 ppm/yr	±75 ppm/3 yrs	± 20 ppm/°C
1 n	10 O	0.8 A	0.8 V	0.6 W	±20 ppm/yr	±25 ppm/3 yrs	± 20 ppm/°C	Wirewound, non-inductive
10 n	100 O	0.25 A	2.5 V	0.6 W	±20 ppm/yr	±25 ppm/3 yrs	± 15 ppm/°C
100 n	1 kO	80 mA	8 V	0.6 W	±20 ppm/yr	±25 ppm/3 yrs	± 5 ppm/°C
1 kn	10 kO	23 mA	23 V	0.5 W	±20 ppm/yr	±25 ppm/3 yrs	± 5 ppm/°C
10 kn	100 kO	7 mA	70 V	0.5 W	±20 ppm/yr	±25 ppm/3 yrs	± 5 ppm/°C
100 kn	1 MO	2.3 mA*	230 V*	0.5 W*	±20 ppm/yr	±25 ppm/3 yrs	± 5 ppm/°C
1 Mn	10 MO	0.7 mA*	700 V*	0.5 W*	±20 ppm/yr	±25 ppm/3 yrs	± 5 ppm/°C
10 Mn	100 MO	0.1 mA*	1000 V*	0.1 W*	±50 ppm/yr	±100 ppm/3 yrs	± 10 ppm/°C	Metal oxide film
*Subject to maximum of 2000 V to case

• Accuracy: £1 MW steps: ±(0.01% + 2 mW)
  • 10 MW steps: ±0.03%
• At 23°C, after subtraction of zero resistance
• Traceable to SI
• Zero Resistance: £1 MW steps: £1 mW per decade
  • 10 MW steps: approx. 3 mW
• Max Voltage to Case: 2000 V peak
  • Switch Type: Multiple solid silver alloy contacts; continuous rotation; 11 positions marked “0” to “10”.
• Operation: If switches have not been operated for an extended period, they should be rotated a few times in both directions to restore contact resistance to specifications.
• Operating Conditions: +10 to + 40°C, <50% RH.

WARNING

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.

OPERATION

Initial Inspection and Setup

• This instrument was carefully inspected before shipment.
• 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 specifications.

Connection

General Considerations

• The 1433 Series Decade unit provides three terminals labeled H (high), L (low), and G (ground). The H and L terminals are connected to the set resistance; the G terminal is connected to the case. The G terminal may be used as a guard or shield terminal. It may also be connected (using a shorting link) to the L terminal to allow two-terminal as opposed to three-terminal measurements.
• In order to make the most stable measurements, determine which is the more sensitive of the two user leads, i.e. the one going into a higher impedance. This lead should be connected to the more protected of the two terminals: H (high) or L (low). That would either be the terminal that is shorted to the case, or the L terminal if neither is connected to the G (case).
• If switches have not been operated for an extended period, they should be rotated a few times to assure that contact resistance is within specifications.

Electrical Considerations

• In order to make proper use of the full performance capabilities of the 1433 unit, especially if low resistance or low-resistance increments are important, take care when connecting to the terminals. In particular, in order to keep contact resistance to a minimum, make the most substantial and secure connection to the binding posts. They accept banana plugs, telephone tips, spade lugs, alligator clips, and bare wire.
• The largest or heaviest mating connection should be made, and, where applicable, the binding posts should be securely tightened.
• These considerations may be relaxed whenever single milliohms are considered insignificant for the task being performed.

Four-Wire Kelvin-Lead Connections

• Whenever possible, 4-wire Kelvin leads (the best connection) should be employed. Such a connection minimizes the effects of contact resistance and approaches ideal performance.
• If the four terminals are available as clamps similar to alligator clips, they may be connected to the necks of the binding posts on a 3-terminal unit. If the four wire connections are available separately, the optimal connections are shown in Figure 3-1 and Figure3-2.

Thermal emf Considerations

• The highest-quality low-emf components are used in the 1433 Series. There nevertheless may be some minute thermal emf generated at the test leads where they contact the gold-plated binding posts.
• This emf will not manifest itself if an ac measurement instrument is employed. It will also be eliminated if a meter with a “True Ohm” capability is used.
• Otherwise it may appear as a false component of the dc resistance measurement. It is possible to eliminate this component of the reading error by taking a second measurement with the leads reversed and averaging the readings.

Dial Setting

• Whenever the dials are used in positions 0-9, the resulting resistance is read directly. The decimal point and the steps are clearly marked on the panel.
• For additional flexibility 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 Ω becomes:

MAINTANENCE

Preventative Maintenance

• Keep the unit in a clean environment. This will help prevent possible contamination.
• The 1433 is packaged in a closed case, which limits the entry of contaminants and dust to the inside of the instrument. If it is maintained in a clean or air-conditioned environment, cleaning will seldom be required. In a contaminated atmosphere, cleaning may be required.

Should cleaning be needed, do the following:

1. Remove the 4 screws from the sides of the housing, and remove the housing.
2. Remove any dust or debris using optical grade dry compressed air or a clean brush.
3. Should switch contact cleaning or lubrication be required, as may be indicated by an increase in the zero resistance, this may be done by applying a drop of a conditioning compound such as Deoxit from Caig Laboratories, or Super Lube with PTFE from Synco Chemical Corp on the switch contacts.
4. Replace the housing and reinstall the 4 housing screws.

The front panel should be periodically cleaned to eliminate any leakage paths around the binding posts. To do this wipe the front panel clean using alcohol and a lint-free cloth.

Calibration Interval

• The recommended calibration interval for 1433 Series decade substituters is twelve (12) months. The calibration procedure may be carried out by the user if a calibration capability is available, by IET Labs, or by a certified calibration laboratory. If the user should choose to perform this procedure, then the considerations below should be observed.

General Considerations

• It is important, whenever testing the 1433 Series Decade Units, to be very 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 confirm or improve the accuracy of the testing instrument
• Such test instruments must be significantly more accurate than ±(l00 ppm+2 mW) for all applicable ranges, allowing for a band of uncertainty of the instrument itself. 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 1433 to stabilize for a number of hours at the nominal operating temperature of 23°C, and at nominal laboratory conditions of humidity <80% RH. There should be no temperature gradients across the unit under test.
• Substantial Kelvin-type 4-wire test terminals should be used to obtain accurate low-resistance readings. It is convenient, once the zero resistance has been determined, to subtract it from the remaining measurements. This can be automatically done in many instruments which have an off set subtraction capability.

Calibration Procedure

1. Employ proper metrological practices.
   • Allow a confidence band for the uncertainty of the measuring instrument and setup.
2. Confirm the zero resistance of the unit.
3. Determine the allowable upper and lower limits for each resistance setting of each de-cade based on the specifi ed accuracy. For the 1433 series, these limits for any resistance “R” are [R±(0.0001 R + 2 mΩ)].
4. Confirm that the resistances fall within these limits after subtraction of the zero resistance.
5. If any resistances fall outside these limits, the associated switch assembly may require trimming or replacement.

Schematic

Figure 4-1 gives the schematic of the 1433 decade unit.

Replaceable Parts List

Model Ref	IET Pt No	Description
1	BP-1000-RD	Binding Post, Red
2	BP-1000-BK	Binding Post, Black
3	BP-1000-GN	Binding Post, Green
4	1433-4300-KNB	Knob Assembly
Not Shown	1433-3100	Foot
Not Shown	1433-4000-X-.001	1 mΩ/step Decade Switch Assembly
Not Shown	1433-4000-X-0.01	10 mΩ/step Decade Switch Assembly
Not Shown	1433-4000-X-0.1	100 mΩ/step Decade Switch Assembly
Not Shown	1433-4000-X-1	1 Ω/step Decade Switch Assembly
Not Shown	1433-4000-X-10	10 Ω/step Decade Switch Assembly
Not Shown	1433-4000-X-100	100 Ω/step Decade Switch Assembly
Not Shown	1433-4000-X-1k	1 kΩ/step Decade Switch Assembly
Not Shown	1433-4000-X-10k	10 kΩ/step Decade Switch Assembly
Not Shown	1433-4000-X-100k	100 kΩ/step Decade Switch Assembly
Not Shown	1433-4000-X-1M	1 MΩ/step Decade Switch Assembly
Not Shown	1433-4000-X-10M	10 MΩ/step Decade Switch Assembly

Table 4-1: Replacement List

• www.ietlabs.com
• Email: info@ietlabs.com
• TEL: (516) 334-5959
• FAX: (516) 334-5988

Documents / Resources

IET GenRad 1433 Decade Resistor [pdf] Owner's Manual GenRad 1433 Decade Resistor, GenRad 1433, Decade Resistor, Resistor

References

• IET Labs a World Standard In Metrology - Home Page
• P65Warnings.ca.gov
• User Manual