Simpson 260 User Manual

OPERATORS
MANUAL
260 « 270
VOLT-OHM-MILLIAMMETER
Bach
$i
Simpson
)
LIMITED
LONDON
CANADA
IN U. т^; SIMPSON ELECTRIC COMPANY у
5200 W. Kenzie St. Chicago 44, Ill.

Simpson 260 Specifications

General

Type	Analog Multimeter
Decibel Ranges	-20 to +50 dB
DC Current Ranges	50µA, 1mA, 10mA, 100mA, 500mA, 10A
AC Current Ranges	10mA, 100mA, 500mA, 10A
Battery Type	1x D cell, 1x 9V
Input Impedance	20, 000 ohms per volt DC; 5, 000 ohms per volt AC
AC Voltage Ranges	2.5V, 10V, 50V, 250V, 500V, 1000V
Accuracy	±2% of full scale

Summary

Electrical Specifications

D.C. Voltage

DC voltage measurement ranges and sensitivity.

A.C. Voltage

AC voltage measurement ranges and sensitivity.

A.F. Output Voltage

Volume Level

D.C. Resistance

Resistance measurement ranges and specifications.

D.C. Current

DC current measurement ranges and specifications.

Frequency Response

Temperature Effect

Accuracy - Model 260

Accuracy specifications for Model 260.

Accuracy - Model 270

Accuracy specifications for Model 270.

D.C. Ranges Accuracy

Accuracy for specific DC ranges.

A.C. Ranges Accuracy

Resistance Ranges Accuracy

Operating Instructions: General

Check Zero Setting

Observe Caution

Operating Instructions: Specific

D.C. Voltage Measurements

Measuring A.C. Voltages to 1,000 Volts

Frequency Correction - Models 260 and 270

Measuring A.C. Voltage to 5000 Volts

Measuring Output Voltages

Low Frequency Correction for Output Measurements

Measuring Decibels

Ohmmeter Circuit

Zero Ohms Adjust

Measuring Resistances

Measuring Direct Currents, 0 to 50 Microamperes

Measuring Direct Currents, 50 Microamperes to 500 Milliamperes

Measuring Direct Currents, 500 Milliamperes to 10 Amperes

Schematic Diagram

Maintenance

How to Open the Case

Steps to access internal components for repair.

Battery Replacement

Instructions for replacing the instrument's batteries.

Observe Polarity

Polarity considerations for battery installation.

Fuse Replacement

Instructions for replacing the instrument's fuse.

Sub-panel Parts Replacement

Rectifier Replacement and Recalibration

Replacing and recalibrating rectifiers.

Resistor Replacement

Procedure for replacing resistors on the circuit board.

Applications

General

Rectifier Checks

Capacitor Checks