IDEAL 61-340, 61-342 TECHNICAL MANUAL
IDEAL INDUSTRIES, INC.
TECHNICAL MANUAL
MODEL: 61-340
MODEL: 61-342
Multimeter 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: TM61340-2
Revision: 4. Date: May 2010
Form Number TM61340-2 Rev 4 May 2010
TABLE OF CONTENTS Page
Introduction
1
Precautions and Safety Information
1
Symbols
1
Safety
2
Specifications
3
General Specifications
3
Measurement Characteristics
4
Voltage Specifications
4
Current Specifications
4/5
Resistance, Diode, Continuity, Capacitance Specifications
6
Frequency, Temperature Specifications
7
Auto Power Off, Data Hold/Backlight, SELECT, RANGE, REL, Hz/DUTY, MAX/MIN
7/8
Physical and Environment Characteristics
9
Certifications and Compliances
9
Required Equipment
10
Basic Maintenance
11
Opening the Meter Case
11
Replacing the Battery
11
Replacing Fuses
12
Fuse Replacement
12
Cleaning
12
Performance Tests
13
Testing the Display
13
Testing the Voltage Function
14/15
Testing the DC Current Functions
15/16
Testing the AC Current Functions
16/17
Testing the Resistance Function
18
Testing the Capacitance, Diode, Continuity Functions
18/19
Testing the Frequency Function
20
Testing the DUTY CYCLE Function
20
Testing the Temperature Function
21
Calibration
22
Calibration Adjustment, DCV, ACV DCA and Temperature Functions
22/23
Form Number TM61340-2 Rev 4 May 2010
Page 1
Risk of electric shock
See instruction card (Caution information)
DC measurement
Equipment protected by double or reinforced
insulation
Low Battery indicator
Earth
AC measurement
Conforms to EU directives
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 61-340 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
Form Number TM61340-2 Rev 4 May 2010
Page 2
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.
For operating instructions, see the 61-340 / 61-342 Digital Multimeter Instruction Manual.
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.
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.
Do Not Exceed the maximum rated input limits, as marked on the meter.
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.
Use great care when you are required to make measurements on live circuits that exceed 50V.
Form Number TM61340-2 Rev 4 May 2010
SPECIFICATIONS
Characteristics
Description
Display count
3 3/4 digit liquid crystal display, max count 3999
Numeric update rate
2.5 times / sec
Polarity display
Automatic
Over range display
“OL” is displayed
Low battery indicator
is indicated
Automatic power-off time
Automatic power off ≈ 10minutes
Power source
9.0V battery: types- NEDA 1604, JIS006P, IEC6F22
for both 61-340 and 61-342
Maximum input voltage
1000Vrms CAT III between V and COM
Maximum floating voltage
1000Vrms CAT III between any terminal and earth ground
Maximum input current
400mA between µA /mA and COM
Overload protection mA connector
500mA (500V) fast blow fuse.
Overload protection 10A connector
10A (500V) fast blow fuse.
V connector
V , V , Ω, , , , Hz
µA /mA connector
µA, mA, Temp
Temperature Coefficient
0.1×(Spec. Accuracy) per °C, <18°C or >28°C
Battery Life
Alkaline 9V, ≈ 200 hours for 61-340
Alkaline 9V, ≈ 150 hours for 61-342
All specifications are warranted unless noted typical and apply to the 61-340 & 61-342
Stated accuracies are at 23°C±5°C at less than 75% relative humidity and without the battery indicator
displayed.
General specifications
Page 3
Form Number TM61340-2 Rev 4 May 2010
Page 4
Range
Resolution
Accuracy
Over voltage
protection
400.0mV
0.1mV
±(0.5% reading + 5 digits)
900VDC or 750VAC
4.000V
1mV
40.00V
10mV
400.0V
100mV
600V
1V
±(1.0% reading + 3 digits)
Range
Resolution
Accuracy
Over voltage
protection
400.0mV
0.1mV
±(1.5% + 5)
900VDC or 750VAC
4.000V
1mV
40.00V
10mV
400.0V
100mV
600V
1V
Range
Resolution
Accuracy
Input Protection
400.0µA
0.1μA
±(0.5% reading + 5 digits)
500mA, 600V Fast
Blow Fuse
4000µA
1μA
40.00mA
10μA
400.0mA
0.1mA
Measurement Characteristics
Accuracy is ±(% reading + number of digits) at 23°C ± 5°C, less than 75% R.H.
(1) DC Volts (for 61-340 / 61-342)
Input Impedance: 10MΩ
(2) AC Volts (61-340/61-342)
Input Impedance: 10MΩ
AC Conversion Type: 61-340: Average sensing rms indication calibrated to the sine wave input.
61-342: AC conversion is True RMS responding, calibrated to a sinusoidal
waveform
Crest Factor: C.F. = Peak/RMS
For non-sinusoidal waveform, C.F. > 2 add ±1% to accuracy,
Frequency response: 40～400Hz
(3a) DC micro-amp and milli-amps (for 61-340 / 61-342)
Overload Protection: mA Input: 500mA, 600V Fast Blow fuse. (61-340 / 61-342)
Form Number TM61340-2 Rev 4 May 2010
(3b) DC Current (61-340 / 61-342)
Range
Resolution
Accuracy
Input Protection
4.000A
0.001A
±(1.5% reading + 5 digits)
10A, 500V Fast Blow
Fuse
10.00A*
0.01A
Range
Resolution
Accuracy
Input Protection
400.0µA
0.1μA
±(1.5% reading + 5 digits) **
40Hz ~ 400Hz
500mA, 500V Fast
Blow Fuse
4000µA
1μA
40.00mA
10μA
±(2.0% reading + 5 digits) **
40Hz ~ 400Hz
400.0mA
0.1mA
Range
Resolution
Accuracy
Input Protection
4.000A
0.001mA
±(2.5% reading + 5 digits) **
40Hz ~ 400Hz
10A, 500V Fast Blow
Fuse
10.00A*
0.01mA
Overload Protection: A Input: 10A, 500V Fast Blow fuse. (61-340 / 61-342)
*Caution: Do not make high current measurements on the 10A scale for longer that 15 seconds. This should be
followed by a 15 minute cool down period. Exceeding 15 seconds may cause damage to the meter and/or the test
leads.
(4a) AC micro-amp and milli-amps Current (61-340 / 61-342)
Overload Protection: μA / mA Input: 500mA, 500V Fast Blow fuse. (61-340 / 61-342)
(4b) AC Current (61-340 / 61-342)
Page 5
Overload Protection: A Input: 10A, 500V Fast Blow fuse.
AC Conversion Type: AC conversions are True RMS responding, calibrated to the sine wave input.
*Caution: Do not make high current measurements on the 10A scale for longer that 15 seconds. This should be
followed by a 15 minute cool down period. Exceeding 15 seconds may cause damage to the meter and/or the test
leads.
** The specified accuracy is for sine wave at full scale and non-sine wave at half scale with crest factor
up to 2.
Form Number TM61340-2 Rev 4 May 2010
Page 6
Range
Resolution
Accuracy
Over voltage
protection
400.0Ω **
0.1Ω
±(1.2% reading + 5 digits)
600Vrms
4.000KΩ
1Ω
±(1.0% reading + 2 digits)
40.00KΩ
10Ω
400.0KΩ
100Ω
4.000MΩ
1KΩ
±(1.2% reading + 2 digits)
40.00MΩ ***
10KΩ
±(2.0% reading + 5 digits)
Range
Resolution
Accuracy
Max. Test
Current
Max. Open
Circuit Voltage
1mV
Not specified
<1mA, approx.
2.5V, approx.
Range
Resolution
Accuracy
Over voltage
Protection
40.00nF
10pF
±(3.0% reading + 10 digits)
600Vrms
400.0nF
100pF
±(3.0% reading + 5 digits)
4.000μF
1nF
40.00μF
10nF
400.0μF
100nF
±(20% reading + 5 digits) ***
4000μF **
10μF
(5) Resistance (for 61-340 / 61-342)
Open circuit Voltage: 0.44V approx.
** < 5 digit of reading rolling.
*** < 2% of reading rolling.
(6) Diode Check and Continuity (for 61-340 / 61-342)
Overload Protection: Not specified
Continuity: Built-in buzzer sounds when resistance is less than approximately 120 Ω with a response
time of approximately 100 msec.
(7) Capacitance (for 61-340 / 61-342)
** In this range the reading may be rolling within specification.
*** Specify reading < half full scale of range.
Note: The meter selects the proper range automatically. Each measurement takes about one
second per range. Readings >40.00μF will take ≈ 8 seconds or greater
Form Number TM61340-2 Rev 4 May 2010
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