Resistance Decade Boxes

Decade Resistance  Boxes

A range of units to cover the requirements  of both development
laboratories and calibration and test departments.

>> ZX70  Series - Decade  Resistance Boxes (0.01% accuracy)
>> ZX90  Series - Decade  Resistance Boxes (0.1% accuracy)
 >> 4720  Series - 9 Decade  High Resistance Boxes for the checking
and calibration of Insulation Testers at voltages up to 5000V
 >> 4721 - Single,  High Resistance Decade Box for the checking and
calibration of Insulation Testers at voltages up to 5000V

Decade Resistance Boxes - ZX Series

ZX74 Series

The ZX74 Series of Decade Resistance Boxes are very high accuracy
and stable  six-dial instruments. There are 4 versions in the series with a
maximum resistance  of 1,111,111W. The ZX83 series adds another  two
Decade Boxes that extend the resistance range to 111,111,100W.

The resistive elements are non-inductively wound on high quality formers 
using a resistance wire of specially selected alloy. Each resistive element 
is heat treated and undergoes a controlled ageing process to produce the
very  highest stability and also a low temperature coefficient.

Switches are of the highest quality with low pressure contacts for long life 
and reliability. Each decade switch is manufactured using a fully enclosed 
construction for maintenance free operation. These decade boxes are
housed  in attractive robust metal cases with a retractable carrying 
handle.
The very popular ZX74 model has a lowest decade with steps of 1mW. 
This is particularly useful for Resistance Thermometer Simulation and
resistance  bridge networks. All models have an extra terminal connected
to the electrostatic  screen which may be required in AC. bridge
applications.

ZX90 Series

The ZX90 Series of Decade Resistance  Boxes comprise of 10
instruments to cover a resistance range of up to 1,111,111W  with
instruments available in 4, 5, 6 and 7 Decades. Whilst they are low  cost
these instruments are of high quality and feature precision low contact 
resistance switches.
The resistive elements are made of enamelled  manganin wire which is
non-inductively wound onto high quality formers. Each resistive element is
heat treated and undergoes a controlled ageing process  to produce the
very highest stability and to achieve low temperature coefficient. 
The instruments are housed in an attractive metal case which is both
robust  and dust proof.

For more information, see the manufacturer's site:
www.tinsley.co.uk/products/decade-resistance-boxes/index.htm

Portable 9 Decade High Resistance Box
Model 4720  Series

Designed for the checking  and calibration of insulation testers at voltages
of up to 5000V DC, the  Tinsley Model 4720 high resistance decade boxes
provides up to 9 decades  of resolution.
The total range covered  is from 1 kW to  1,111,111,110kW using 
specially selected resistors and high quality switches mounted on an easy 
to read panel.
These decade resistance  boxes are housed in strong reinforced
polystyrene cases with lids and carrying  handles to provide an ideal
solution to on-site and laboratory calibration  of high resistance insulation
testers.
The instruments can be  supplied complete with a calibration certificates
provided by our own in-house  calibration laboratory.

For more information, see the manufacturer's site:
www.tinsley.co.uk/products/decade-resistance-boxes/4720.htm

Single, High Resistance Decade Box
Model 4721

> Calibration of insulation tester 
> Range 1kW to  1TW 
> Voltage rating up to 5,000V DC 
> Portable field or laboratory use  
The Tinsley Model 4721 decade box is  designed for the checking and
calibration of insulation testers at voltages of up to 5000v DC.
The total range covered  is from 1 kW  to 1TeraW  using specially
selected resistors and a high quality switch mounted on an  easy to read
panel.
This resistance box is  housed in a strong aluminium case with lid and
carrying handle to provide  an ideal solution to on-site and laboratory
calibration of high resistance insulation testers.
The instrument can be  supplied complete with a calibration certificate
provided by our own in-house  calibration laboratory.

For more information, see the manufacturer's site:
www.tinsley.co.uk/products/decade-resistance-boxes/index.htm

View other products of the manufacturer:
www.tinsley.co.uk

IET Decade Box source

Our decade box products cover a full range of applications including field,
laboratory and Automated Test Equipment. Remember, IET Labs builds
it's own products, so you can custom specify options including special
schedules (per decade fixed and % accuracy) as well as specific power
dissipation or terminal configurations.

>> Resistance Decade Box models
ranging from 1 mΩ to 10 TΩ
>> Capacitance Decade Box models
ranging from 1pF to 10,000 µF
>> Inductance Decade Box models
ranging from 1µH to 100 H

Resistance Decade Boxes

IET Labs manufactures a full line of resistance decade boxes that will
meet any need.  Whatever your application, IET Labs has a decade box
solution. Our resistance decade boxes can be custom built to your
specifications, so you do not have to pay for what you don't need.

Low Cost Field Grade Resistance Decade Box

RCS-box Series Digital Substituter
The RC-box combines the features and specifications of both the R-box
and the C-box in one convenient package. Ideal for setting timers,
oscillators, and filters, the resistance and capacitance may be used
independently, in series, or in parallel. A shorting link allows them to be
coupled or separated.

Best Substituter Value Available > Accurate .01% to 1% > Available from 1 pF to 999.9999 µF > Broad choice of standard and optional models with many powerful features > Compact, convenient, and rugged > Panel Mounting, Shielded Case and Fuse Protection options available

For more information, see the manufacturer's site:
www.ietlabs.com/IET/RCSbox.html

Low Cost Microprocessor Controlled Resistance
Decade Box

ohmSOURCE Series Programmable Resistance Decade Boxes

Your SOURCE of Resistance! The revolutionary ohmSOURCE Programmable Resistance Boxes are like nothing you have ever seen before! Microprocessor-controlled and loaded with innovative features, the ohmSOURCE Programmable Resistance Decade Boxes succeeds in providing highly accurate and precise  resistance values in an intuitive

and user-friendly fashion. With a resistance value range of up to 2.4 M?
and a power rating of up to 1 Watt, the handheld ohmSOURCE decade
boxes are practical for all industries including automotive, medical,
test and measurement, telecommunications, and HVAC.

For more information, see the manufacturer's site:
www.ietlabs.com/IET/ohmSource.html

High Accuracy Resistance Decade Box
HARS Series

Our HARS Series is the best choice when you need a laboratory grade,
tight tolerance, high performance resistance decade box that is also cost
effective.

> Resistance from 1 mΩ to 111 MΩ
> Excellent stability - 10 ppm/yr, 25 ppm/ 3 yrs
> Wide choice - single through 11 decade units
> High accuracy - 0.01% (100 ppm)

> HARS-Z: ±(50 ppm + 1 mΩ)
> HARS-X: ±(0.01% + 2 mΩ)
> HARS-A: ±(0.05% + 2 mΩ)
> HARS-Q: ±(0.02% + 2 mΩ)
> HARS-B: ±(0.1% + 4 mΩ)

> Very low zero resistance: <1 m? per decade
> High performance solid silver alloy switches
> Low temperature coefficient - 5 ppm/°C
> Noninductive or low inductance resistors
> Rack mounting available
> Special and custom configurations available

For more information, see the manufacturer's site:
www.ietlabs.com/IET/HARS.html

View other products:
www.ietlabs.com/decaderes.html