IDEAL 61-320, 61-322, 61-324 TECHNICAL MANUAL

IDEAL INDUSTRIES, INC. TECHNICAL MANUAL

MODEL: 61-320 MODEL: 61-322 MODEL: 61-324

Multimeters Service Information

The Service Information provides the following information:

 Precautions and safety information  Specifications  Basic maintenance (cleaning, replacing the battery and fuses)  Performance test procedures  Calibration and calibration adjustment procedures

Form Number: TM61320-2-4

Revision: 3. Date: Apr 2004

Form Number TM61320-2-4 Rev 3 April 2004

TABLE OF CONTENTS Page

Introduction 1

Precautions and Safety Information 1

Symbols 1

Safety 2

Specifications 3

General Specification 3

Measurement Characteristics 4

Voltage Specification 4

Current Specifications 5

Resistance, Diode Specifications 5

Continuity, Frequency, Capacitance Specification 6

Auto Power Off, Peak Hold 6

Physical and environment characteristics 7

Certification and compliance 7

Required Equipment 8

Basic Maintenance 9

Opening the Meter Case 9

Replacing the Battery 9

Testing Fuses 10

Fuses Replacement 10

Replacing Fuses 10

Cleaning 10

Performance Tests 11

Testing the Display 11

Testing the Voltage Function 12

Testing the Resistance Function 13

Testing the Capacitance Function 13/14

Testing the Diode 14

Testing the milliamp (mA) Function 14/15

Testing the microamp Function 15

Testing the Frequency 15

Testing Frequency Function 15/16

Calibration 17

Calibrating DCV, ACV Functions 17

Calibration Adjustment Points 18/19

Form Number TM61320-2-4 Rev 3 April 2004

Introduction

Warning

To avoid shock or injury, do not perform the verification tests or calibration procedures

described in the manual unless you are qualified to do so.

The information provided in this document is for the use of qualified personnel only.

Caution

The 61-320 serials contain parts that can be damaged by static discharge.

Follow the standard practices for handling static sensitive devices.

For additional information about IDEAL INDUSTRIES, INC. and its products, and services, visit

IDEAL INDUSTRIES, INC. web site at:

www.idealindustries.com

Precautions and Safety Information

Use the Meter only as described in the Service Manual. If you do not do so, the protection provided by the

Meter may be impaired. Read the “Safety Information” page before servicing this product.

In this manual, a Warning identifies conditions and actions that pose hazard (s) to the user; a Caution

identifies conditions and actions that may damage the Meter or the test instruments.

The Symbols

The symbols used on the Meter and in this manual are explained in Table A.

Table A. The Symbols

Risk of electric shock

See instruction card

DC measurement

Equipment protected by double or reinforced

insulation

Battery

Earth

AC measurement

Conforms to EU directives

Form Number TM61320-2-4 Rev 3 April 2004

SAFETY

Review the following safety precautions to avoid injury and prevent damage to this product or any

products connected to it. To avoid potential hazards, use the product only as specified.

CAUTION: These statements identify conditions or practices that could result in damage to the

equipment or other property.

WARNING: These statements identify conditions or practices that could result in personal injury or

loss of life.

Specific precautions

Use proper Fuse. To avoid fire hazard, use only the fuse type and rating specified for this product.

Do not operate without covers. To avoid personal injury, do not apply any voltage or current to the

product without covers in place.

Electric overload. Never apply a voltage to a connector on the product that is outside the range specified

for that connector.

Avoid electric shock. To avoid injury or loss of life, do not connect or disconnect probes or test leads

while they are connected to a voltage source.

Do not operate in wet/damp conditions. To avoid electric shock, do not operate this product in wet or

damp conditions.

Form Number TM61320-2-4 Rev 3 April 2004

SPECIFICATIONS

All specifications are warranted unless noted typical and apply to the 61-320 & 61-322 & 61-324

Stated accuracies are at 23°C±5°C at less than 80% relative humidity and without the battery indicator

displayed.

General specifications

Characteristics Description

Display count 3 3/4

Numeric update rate 1.5 times / sec

Polarity display Automatic

Overrange display “OL” is display

Low voltage indicator is indicated

Automatic power-off time Automatic backslit off = 30 minutes

Power source

9V×1 battery for 61-322 & 61-324;

1.5V×2 batteries for 61-320

Maximum input voltage 1000V CAT III between V and COM

Maximum floating voltage

1000V CAT

III

between any terminal and earth ground

Maximum input current 400mA between mA and COM

Maximum open circuit Voltage (current inputs) 600V between mA and COM

Overload protection mA connector 1A (600V) fast blow fuse.

V connector V , V , Ω, , , , Hz, µA

Temperature Coefficient 0.2×(Spec. Accuracy) / °C, <18°C or >28°C

Battery Life

Alkaline 9V 200 hours for 61-322 & 61-324

Alkaline 1.5V×2 AA size 600 hours for 61-320

Form Number TM61320-2-4 Rev 3 April 2004

Measurement Characteristics

Accuracy is ±(% reading + number of digits) at 23°C ± 5°C, less than 80% R.H.

(1) DC Volts

Range Resolution Accuracy

Over voltage

protection

400.0mV 100µV

4.000V 1mV

40.00V 10mV

±(0.5% reading + 2 digit) 1000V rms

400.0V 100mV

1000V 1V

Input Impedance: 10M (over 1000M in 400mV range).

(2) AC Volts

Range Resolution Accuracy

400.0mV 100µV

4.000V 1mV

±(1.3% reading + 5 digits) *

Unspecified

40.00V 10mV

400.0V 100mV

750V

±(1.2% reading + 5 digits) *

2,3

Over voltage

protection

1000V rms

Input Impedance: 10M // less than 100pF.

Frequency Response: 50Hz ~ 300Hz

Frequency Response: 50Hz ~ 500Hz

* CMRR / NMRR: (Common Mode Rejection Ratio)

(Normal Mode Rejection Ratio)

: CMRR > 60dB at DC, 50Hz / 60Hz

: CMRR > 100dB at DC, 50Hz / 60Hz

NMRR > 50dB at DC, 50Hz / 60Hz

AC Conversion Type: 61-320: Average sensing rms indication calibrated to the sine wave input.

61-322 / 61-324: AC conversions are ac-coupled, true rms responding, calibrated to

the sine wave input.

61-322 / 61-324 The specified accuracy is for sine wave at full scale and non-sine wave at half scale

with crest factor up to 2. Crest Factor: C.F. = Peak/RMS +1.5% addition error for C.F. from 1.4 to 3 +3.0% addition error for C.F. from 3 to 4.

Form Number TM61320-2-4 Rev 3 April 2004

(3) DC Current

Range Resolution Accuracy Voltage Burden

400.0µA 0.1µA 5mV

4000µA 1µA 2V max.

±(1.0% reading + 2 digits)

40.00mA* 10µA 5mV

400.0mA* 0.1mA

2V max.

Overload Protection: mA Input : 1A (600V) fast blow fuse. (61-322 / 61-324)

µA Input : 600V rms.

* For 61-322 / 61-324 only.

(4) AC Current (61-322 / 61-324)

Range Resolution Accuracy Voltage Burden

40.00mA 10µA 5mV

400.0mA 100µA

±(1.5% reading + 5 digits) *

50Hz ~ 500Hz

2V max.

Overload Protection: mA Input : 1A (600V) fast blow fuse. AC Conversion Type: AC conversions are ac-coupled, true rms responding, calibrated to the sine wave

input.

The specified accuracy is for sine wave at full scale and non-sine wave at half scale with crest factor

up to 2.

(5) Resistance

Range Resolution Accuracy

400.0 *

0.1 ±(1.0% reading + 5 digits)

Over voltage

protection

4.000K 1

40.00K 10

±(0.7% reading + 2 digits)

600V rms

400.0K 100

4.000M 1K

40.00M *

10K ±(1.5% reading + 5 digits)

Open circuit Voltage: -1.3V approx.

< 5 digit of reading rolling.

< 2% of reading rolling.

(6) Diode Check and Continuity

Range Resolution Accuracy

Max. Test

Current

Max. Open

Circuit Voltage

1mV ±(1.5% reading + 5 digits) * 1.5mA 3V

* For 0.4V ~ 0.8V Overload Protection: 600V rms. Continuity: Built-in buzzer sounds when resistance is less than approximately 450 Response time

is approximately 100 msec.

Form Number TM61320-2-4 Rev 3 April 2004

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