Elenco Electronics RS-500 Instruction Manual

RESISTANCE SUBSTITUTION BOX

Model RS-500

Elenco Electronics, Inc.

Copyright © 1992 Elenco Electronics, Inc. REV-D 753255

Revised 2001

Instruction Manual

Schematic Diagram

Green

Green

Elenco Electronics, Inc.

150 W .Carpenter Ave.

Wheeling, IL 60090

[phone]

www.elenco.com

e-mail: [e-mail]

REV-A

Black

INTRODUCTION

The RS-500 Resistance Substitution Box is a convenient
instrument for determining the desired resistance values in circuits
under design or test. The resistance obtainable is form 0Ω to
11,111,110Ω in 1 ohm steps. All resistors are precision 1%
resistors.

OPERATION

All of the resistors are wired in series. A switch on the front panel
shorts each resistor. Putting the switch in the ON (up) position
removes the short and places the resistor across the output
terminals. The two green binding posts serve as the output
terminals. The blac k binding post is tied to the front panel. T o place
any resistance across the output terminals turn ON those switches
that add up to the desired resistance. For e xample , f or 5,071Ω, turn
on the 3kΩ, 2kΩ, 40Ω, 30Ω and 1Ω switches.

TWO YEAR WARRANTY

All Elenco models are guaranteed for two full years on
all parts and service. For the first 3 months, your power
supply is covered at absolutely no charge. For the
remaining 21 months, a nominal service charge is
required to cover shipping and handling.

When returning merchandise for repair, please include
proof of purchase, a brief letter of explanation of
problem, and sufficient packing material. Before
returning any merchandise please call our service
department at [phone] to obtain a return
authorization number (RMA).

Service Department

PARTS LIST

RESISTORS

Qty Description Part # Qty Description Part #

11Ω 1% 2W 111033 1 3kΩ 1% 1W 143032
12Ω 1% 2W 112033 1 4kΩ 1% 1W 144032
13Ω 1% 2W 113033 1 10kΩ 1% 1W 151032
14Ω 1% 2W 114033 1 20kΩ 1% 1W 152032
110Ω 1% 2W 121033 1 30kΩ 1% 1W 153032
120Ω 1% 2W 122033 1 40kΩ 1% 1W 154032
130Ω 1% 2W 123033 1 100kΩ 1% 1/2W 161031
140Ω 1% 2W 124033 1 200kΩ 1% 1/2W 162031
1 100Ω 1% 1W 131032 1 300kΩ 1% 1/2W 163031
1 200Ω 1% 1W 132032 1 400kΩ 1% 1/2W 164031
1 300Ω 1% 1W 133032 1 1MΩ 1% 1/2W 171031
1 400Ω 1% 1W 134032 1 2MΩ 1% 1/2W 172031
11kΩ 1% 1W 141032 1 3MΩ 1% 1/2W 173031
12kΩ 1% 1W 142032 1 4MΩ 1% 1/2W 174031

MISCELLANEOUS

Qty Description Part #

1 PC Board 517011
28 Switch Slide DPDT 541023
1 Front Panel 614103
1 Case 623003
4 Spacer 7/16” x 1/4” 624120
4 Spacer 4-40 x 1/2” 624431
1 Binding Post Black 625031
3 Lockwasher, Binding Post 625031LW
3 Nut, Binding Post 625031HN
2 Binding Post Green 625033
4 Screw 4-40 x 1/4” Flat Head 641434
4 Screw 4-40 x 3/4” Pan Head 641483
3 Washer Flat 1/8” 645600
1 Lockwasher #4 Internal 646402
3 Lockwasher #4 External 646405