Instruction manual

ManualsBrandsMajor Science ManualsConsumer electronicsMS 250V

Instruction Sheet

for the PASCO

Model ES-9053A

012-04221C

11/94

$1.00

RESISTOR -CAPACITOR NETWORK

Introduction

The PASCO Model ES-9053A Resistor-Capacitor Net-

work is designed for the study of RC time constants and

for investigating capacitors connected in series and paral-

lel. The RC time constants range from 25 to 200 seconds,

so charging and decay curves can easily be investigated

using an electrometer, such as the PASCO Model

ES-9054B Student Electrometer, and a stopwatch.

Two resistors and three capacitors are wired into a

switching network, which allows selecting three resis-

tance values (50 ΜΩ, 100 MΩ, and 200 MΩ) in series

with two selectable capacitance values (0.47 µF and .94

µF). A third capacitor (0.22 µF) can be selected in series

or parallel with the other two capacitances.

The switches and external connections allow the follow-

ing combinations:

• Six combinations of resistors and capacitors in series.

• Two combinations of capacitors in series.

• Two combinations of capacitors in parallel.

Three slide switches determine the component selection

and circuit configuration (charging, discharging, or open cir-

cuit). The positions of these slide switches on the front panel

diagram indicate the exact component values being used.

1.0 x 10 ohms

.47 x 10 farads

-6

(B)

(A)

Figure 1: Switch Positions & Equivalent Circuit

Figure 1 (A) shows the slide switches in arbitrary posi-

tions, while Figure 1 (B) reflects the corresponding

equivalent circuit diagram.

The three position slide switch on the left (S3) has a

very useful OPEN position. It is often convenient to

stop the charging or discharging process when making

a measurement, and the OPEN position permits the

circuit to be disconnected.

OPEN

COMPONENTS: ±5%

MAX. 50 VOLTS

1.0 X 10 Ω

2.0 X 10 Ω

.50 X 10 Ω

.22 X 10 F

-6

.47 X 10 F

-6

.94 X 10 F

-6

EXT

INPUT

GND

OUT

ES-9053A

RESISTOR - CAPACITOR

NETWORK