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Programmable Resistance - Capacitance -

Inductance - RTD Decade Substituter

PRS-PCS-PLS-PRTD Series

Page 2 of 5

PRS Catalog Nov 2021

OPTIONS AND CONFIGURATIONS

Dual PRS Resistance and PCS Capacitance Subs•tuter with rack mount op•on

Model PRS-201 Bench Resistance Subs•tuter

Choice of Performance:

PRS-200 Series - economical 1% ac-

curacy

PRS-201 Series - laboratory 0.1% ac-

curacy

PRS-202 Series - high accuracy to 0.01%

and improved stability using wire-wound

resistors for 1 Ω/step to 100 kΩ/step for

stability of 10 ppm/year. This compares

to 50 ppm/year using precision metal film

resistors in the PRS 200 and 201.

Digital Display (D Option): Shows

the remotely programmed or manu-

ally set value.

This is useful for

confirming or monitoring the selected

command value, remote or local. This

option requires the rack mount RM

option.

Wide choice of impedance ranges:

resistance, capacitance and inductance

of up to 10 decades may be specified.

Resistance may range from 1 mΩ to

100 MΩ.

Package Configuration:

Convenient

standard 19" rack mounting (RM) or

more portable benchtop versions, are

available. Both single and dual units are

available.

Combinations: Dual units can combine

any two resistance, capacitance, induc-

tance substituters in one chassis.

Rear Outputs: Single or dual front panel

binding posts are standard. Rear binding

post outputs are available with option RO.

PRTD: Low-resistance models with a

fixed minimum resistance setting (4 Ω.

or as specified by customer) are suitable

for RTD (Resistance Temperature De-

tector) simulations. This design virtually

eliminates the effect of zero resistance

and relay contact resistance, providing

the specified absolute accuracy over its

entire range.

Short-Circuit (SC) and Open-Circuit

(OC) Options: Optional short-circuit and

open-circuit modes of operation. These

states are controlled only in the REMOTE

programming mode.

The Open Circuit OC option gives the

user an open circuit immediately in series

with the HI binding post during switching

between values. The Short Circuit SC

operation gives the user a short circuit

across the HI and the LO binding posts

during switching. The short circuit imped-

ance is very small, <20 mΩ, typically 5

mΩ. This is lower than the regular zero

resistance setting. In both these cases,

the underlying resistance setting is unaf-

fected and may still be controlled.

Special Customer Requirements:

High voltage, nonstandard values, high

stability, ultra-low temperature coefficient

or improved accuracy can be accom-

modated.

High-Power Options: Power dissipa-

tion requirements of up to 500 Watts

can be accommodated.

-D Digital Display Op•on

PLS Programmable Inductance Subs•tuter with digital display and rack

mount op•ons