IDEAL INDUSTRIES Welder 61 340 User 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: 2. Date: November 2007  
Form Number TM61340-2  
Rev 2 November 2007  
 
Page 1  
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:  
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 (Caution information)  
DC measurement  
Equipment protected by double or reinforced  
insulation  
Low Battery indicator  
Earth  
AC measurement  
Conforms to EU directives  
Form Number TM61340-2  
Rev 2 November 2007  
 
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 2 November 2007  
 
Page 3  
SPECIFICATIONS  
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  
Characteristics  
Description  
Display count  
3 3/4 digit liquid crystal display, max count 4000  
2.5 times / sec  
Numeric update rate  
Polarity display  
Automatic  
Over range display  
Low battery indicator  
Automatic power-off time  
“OL” is displayed  
is indicated  
Automatic power off 10minutes  
9.0V battery: types- NEDA 1604, JIS006P, IEC6F22  
for both 61-340 and 61-342  
Power source  
*Maximum input voltage  
*Maximum floating voltage  
Maximum input current  
Overload protection mA connector  
Overload protection 10A connector  
V connector  
1000Vrms CAT III between V and COM  
1000Vrms CAT III between any terminal and earth ground  
400mA between µA /mA and COM  
500mA (250V) fast blow fuse.  
10A (250V) fast blow fuse.  
V
, V , ,  
,
,
, Hz  
µA /mA connector  
µA, mA, Temp  
Temperature Coefficient  
Battery Life  
0.1×(Spec. Accuracy) per °C, <18°C or >28°C  
Alkaline 9V, 200 hours for 61-340  
Alkaline 9V, 150 hours for 61-342  
Form Number TM61340-2  
Rev 2 November 2007  
 
Page 4  
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)  
Over voltage  
protection  
Range  
Resolution  
Accuracy  
400.0mV  
4.000V  
40.00V  
400.0V  
1000V  
0.1mV  
1mV  
±(0.8% reading + 3 digits)  
±(0.8% reading + 1 digits)  
±(1.0% reading + 3 digits)  
1000VDC or 750VAC  
10mV  
100mV  
1V  
Input Impedance: 10MΩ  
(2) AC Volts (61-340/61-342)  
Over voltage  
protection  
Range  
Resolution  
Accuracy  
±(1.2%+8)  
400.0mV  
4.000V  
40.00V  
400.0V  
750V  
0.1mV  
1mV  
1000VDC or 750VAC  
10mV  
100mV  
1V  
1.0% + 5  
±(1.2%+5)  
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: 40400Hz  
(3a) DC micro-amp and milli-amps (for 61-340 / 61-342)  
Range  
400.0µA  
4000µA  
40.00mA  
400.0mA  
Resolution  
0.1μA  
Accuracy  
Input Protection  
±(0.8% reading + 2 digits)*  
1μA  
500mA, 250V Fast  
Blow Fuse  
10μA  
±(0.8% reading + 3 digits)*  
0.1mA  
Overload Protection: mA Input: 500mA, 250V Fast Blow fuse. (61-340 / 61-342)  
Form Number TM61340-2  
Rev 2 November 2007  
 
Page 5  
(3b) DC Current (61-340 / 61-342)  
Range  
4.000A  
10.00A*  
Resolution  
Accuracy  
Input Protection  
0.001A  
0.01A  
10A, 250V Fast Blow  
Fuse  
±(1.5% reading + 5 digits)  
Overload Protection: A Input: 10A, 250V 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)  
Range  
400.0µA  
4000µA  
40.00mA  
400.0mA  
Resolution  
0.1μA  
Accuracy  
±(1.5% reading + 5 digits) *1  
Input Protection  
40Hz ~ 400Hz  
±(2.0% reading + 5 digits) *1  
1μA  
500mA, 250V Fast  
Blow Fuse  
10μA  
40Hz ~ 400Hz  
0.1mA  
Overload Protection: μA / mA Input: 500mA,250V Fast Blow fuse. (61-340 / 61-342)  
(4b) AC Current (61-340 / 61-342)  
Range  
4.000A  
10.00A*  
Resolution  
0.001mA  
0.01mA  
Accuracy  
±(2.5% reading + 5 digits) *1  
Input Protection  
10A, 250V Fast Blow  
Fuse.  
40Hz ~ 400Hz  
Overload Protection: A Input: 10A (250V) fast blow fuse.  
AC Conversion Type: AC conversions are True RMS responding, calibrated to the sine wave input.  
*1 The specified accuracy is for sine wave at full scale and non-sine wave at half scale with crest factor  
up to 2.  
*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.  
Form Number TM61340-2  
Rev 2 November 2007  
 
Page 6  
(5) Resistance (for 61-340 / 61-342)  
Over voltage  
protection  
Range  
Resolution  
Accuracy  
400.0*1  
4.000KΩ  
40.00KΩ  
400.0KΩ  
4.000MΩ  
40.00M*2  
0.1Ω  
1Ω  
±(1.2% reading + 5 digits)  
±(1.0% reading + 2 digits)  
10Ω  
600Vrms  
100Ω  
1KΩ  
10KΩ  
±(1.2% reading + 2 digits)  
±(2.0% reading + 5 digits)  
Open circuit Voltage: 0.44V approx.  
*1 < 5 digit of reading rolling.  
*2 < 2% of reading rolling.  
(6) Diode Check and Continuity (for 61-340 / 61-342)  
Max. Test  
Current  
Max. Open  
Range  
Resolution  
Accuracy  
Circuit Voltage  
1mV  
Not specified *  
<1mA, approx. 2.5V, approx.  
Overload Protection: Not specified  
Continuity: Built-in buzzer sounds when resistance is less than approximately 120 with a response  
time of approximately 100 msec.  
(7) Capacitance (for 61-340 / 61-342)  
Over voltage  
Protection  
Range  
Resolution  
Accuracy  
REL:±(3% reading + 10 digits)  
40.00nF  
400.0nF  
4.000μF  
40.00μF  
400.0μF  
4000μF *1  
10pF  
100pF  
1nF  
±(3% reading + 5 digits)  
10nF  
100nF  
10μF  
±(20% reading + 5 digits) *2  
*1 In this range the reading maybe rolling within specification.  
*2 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 2 November 2007  
 
Page 7  
(8) Frequency (for 61-340 / 61-342)  
Overload  
Range  
Resolution  
Sensitivity  
Accuracy  
protection  
10.00Hz  
100.0Hz  
0.01Hz  
0.1Hz  
1Hz  
1.000KHz  
10.00KHz  
100.0KHz  
1.000MHz  
4.000MHz  
0.7V rms *  
Frequency:  
600V rms  
10Hz  
(± 0.1% + 3 digit)  
100Hz  
10KHz  
10KHz  
3.0V rms  
(9) Temperature: Type K thermocouple (for 61-340 / 61-342)  
Overload  
Range  
Resolution  
Accuracy  
protection  
1ºC  
1ºF  
±3.0% ± 3 ºC  
±3.0% ± 5 ºF  
-50 to 750 ºC  
-58 to1382 ºF  
Not Specified  
(10) Auto Power Off (APO)  
If the meter idles for more than 10 minutes, the meter automatically turns the power off.  
(11) Data Hold/Backlight  
Press this button less than 2 seconds the meter enter data hold mode and “ HOLD ” symbol appear  
on LCD, and the momentary value while pressing the button display on LCD. Press it again to exit this mode  
and  
HOLD  
symbol disappear on display. As data hold function, this button do not effect on diode  
and continuity test function. The secondary function of this button is backlight enable and disable. If you  
press it more than 2 seconds, the backlight will be turn on and press it more than 2 seconds again will make  
the backlight off.  
(12) SELECT  
There are several functions at one rotary switch position, press SELECT button to select  
function you want, It allowable to select AC or DC voltage, AC or DC current, Resistance ,Diode , Audible  
continuity or capacitance, or temperature measurement.  
(13) RANGE  
When power on, meter at auto range mode, press RANGE button you can select measurement range  
you want. Range is run up with times of pressing RANGE button until its max, then return the min range.  
Press RANGE button more than 2 seconds , the meter return to auto range. This button do not effect on  
frequency, duty cycle, capacitance, diode & continuity test and temperature measurement.  
Form Number TM61340-2  
Rev 2 November 2007  
 
Page 8  
(14) REL  
Press this button the meter enter relative measuring state and “Δ” symbol appear on LCD.  
The result of the relative measurement is the difference between measuring value and  
reference value. The reference value is produced same as momentary reading value when  
pressing this button, press it again to exit this state and “Δ” symbol disappear on display, and  
this button do not effect on frequency, diode and continuity test function. Press this button less  
than 2 seconds the meter enter relative measuring state and “Δ” symbol appear on LCD.  
(15) Hz/DUTY  
When you make frequency, AC voltage or AC current measurement, press this button to switch Hz or  
duty cycle test mode.  
(16) MAX/MIN  
Press MAX/MIN button the meter enter Maximum value / Minimum value record mode and “ MAX ” / ”  
MIN ” symbol appear on LCD, the LCD will display the maximum value or minimum value science pressing  
the button always. Press MAX/MIN more than 2 seconds button again to exit this mode and “ MAX ” / ” MIN ”  
symbol disappear on display. This button do not effect on diode and continuity test function, capacitance  
measurement, frequency measurement.  
Form Number TM61340-2  
Rev 2 November 2007  
 
Page 9  
Physical and Environmental Characteristics  
Characteristics  
Description  
180mm(H) ×91mm (W) ×43mm(D) (with holster)  
7.1” (H) x 3.6”(W) x1.7”(D)  
Dimensions (H×W×D)  
Weight (with battery& holster)  
Environmental characteristics  
Temperature operating  
Non-Operating  
0.379Kg (13.4 oz.)  
Description  
0 to +40°C  
-20 to +60°C <75% R.H.  
<70% R.H.  
Humidity (operating)  
Altitude  
6561.7 Ft. (2000m)  
Indoor Use  
Indoor Use  
Certifications and compliances  
Safety  
Complies with UL 61010B-1  
V / : , UL 61010B-1, UL 61010-B-2-031, EU 61010-1  
EN61010-2-031, Cat IV 600Volts, Cat III 1000V  
Input Safety Rating  
CAT IV: Service drop to service entrance,  
CAT III: Distribution level mains, fixed installation.  
CAT II: Local level mains, appliances, portable equipment  
CAT I: Signal level, special equipment or parts of equipment,  
telecommunication, electronics.  
Do not operate in environments where conductive  
Pollutants may be present.  
Pollution Degree 2  
Meets the intent of Directive 89/336/EEC for Electromagnetic  
Compatibility and Low Voltage Directive 73/23/EEC for product  
safety. Compliance was demonstrated to the following specifica-  
tions as listed in the official Journal of the European Communities:  
En 55011 Class A: Radiated and Conducted  
Emissions.  
EC Declaration  
of Conformity  
En 50082-1 Immunity: IEC 801-2 Electrostatic Discharge  
IEC 801-3 RF Radiated  
En 61010-1 Safety requirements for electrical equipment for  
measurement, control, and laboratory use.  
Form Number TM61340-2  
Rev 2 November 2007  
 
Page 10  
Required Equipment  
Required equipment is listed in Table B. If the recommended models are not available, equipment with  
equivalent specifications may be used.  
Repairs or servicing should be performed only by qualified personnel.  
Table B. Required Equipment  
Equipment  
Required Characteristics  
Recommended Model  
AC Voltage Range: 0 ~ 750V AC  
Accuracy: ±0.07% (Basic)  
Calibrator  
Fluke 5500 or Wavetek  
9100 Calibrator or  
equipment  
Frequency Range: 40 ~ 1KHz  
Accuracy: ±2%  
DC Voltage Range: 0 ~ 1000V DC  
Accuracy: ±0.006% (Basic)  
Current Range: 0 ~ 10A  
Accuracy: AC (40Hz to 1KHz): ±0.08% (Basic)  
DC: ±0.02% (Basic)  
Frequency Source: 1.00Hz ~ 10MHz  
Accuracy: ±0.001%  
Amplitude: 0.5V p-p ~ 5.0V p-p (square wave)  
Accuracy: ±5%  
Resistance Range: 1~ 100MΩ  
Accuracy: ±0.03% (Basic)  
Capacitance Range: 1pF ~ 10mF  
Accuracy: ±0.10% (Basic)  
Form Number TM61340-2  
Rev 2 November 2007  
 
Page 11  
Basic Maintenance  
Warning  
To avoid shock, remove the test leads and any input signals before opening the case or replacing the  
battery or fuses.  
Opening the Meter Case  
Caution  
To avoid unintentional shock circuit, always place the uncovered meter assembly on a protective surface.  
When the case of the meter is open, circuit connections are exposed.  
1. Disconnect test leads from any live source, turn the rotary switch to OFF, and remove the test leads  
from front terminals.  
2. For battery replacement, follow instructions under Replacing the Battery section  
3. For fuse replacement, follow instructions under Fuse Replacement section.  
Replacing the Battery  
The 61-340/61-342 meter are both powered by 9V, types are, NEDA 1604, JIS006P, IEC 6F22  
1. Remove the rubber holster  
2. Remove the screw on the battery cover and open the battery cover  
3. Remove the old battery and install the new battery  
4. Return the battery cover and reinstall the battery cover screw.  
5. Replace the rubber boot.  
Battery and Fuse Replacement  
Figure 1  
Form Number TM61340-2  
Rev 2 November 2007  
 
Page 12  
Replacing Fuses  
Warning  
To avoid electrical shock, remove the test leads and any input signals before replacing the battery  
or fuses. To prevent damage or injury, INSTALL ONLY quick acting fuses with the following  
Volt/Amp current interrupt rating:  
F340: 500mA, 250V Fast Blow Fuse  
F342: 10A, 250V Fast Blow Fuse  
Fuse Replacement  
The 61-340 and 61-342 are fused in both the μA /mA input and 10 amperes input ports.  
μA /mA input port is fused by a F340: 500mA, 250V FAST BLOW fuse, 10 A input port is fused by  
F342: 10A, 250V FAST BLOW fuse  
1. Remove the rubber holster  
2. Remove the screw on the battery cover and open the battery cover.  
3. Remove the two screws at the bottom of back cover and a screw under the support stand.  
4. Take out the old battery, and remove the back case cover.  
5. * Replace the defective fuse with the standard rated fuse for this meter  
6. Return the back case cover, reinsert the case screws.  
a. It is recommended you replace the old battery with new battery.  
7. Return the battery cover and reinstall the battery cover screw.  
8. Replace the rubber boot.  
Use only a fuse with the amperage, interrupt voltage, and speed rating specified.  
Cleaning  
Warning  
To avoid electrical shock or damage to the meter, never allow water inside the case. To avoid  
damaging the meter’s housing, never apply solvents to the meter.  
Form Number TM61340-2  
Rev 2 November 2007  
 
Page 13  
Performance Tests  
The following performance tests verify the complete operability of the meter and check the accuracy of  
each meter function against the meter’s specifications.  
For operating instructions, see the 61-340 / 61-342 Digital Multimeter Instruction Manual.  
Accuracy specifications are valid for a period of one year after calibration, when measured at an  
operating temperature of 18°C to 28°C and a maximum of 75% relative humidity.  
To perform the following tests, it is not necessary to open the case, no adjustments are  
necessary, merely make the required connections, apply the designated inputs, and  
determine if the reading on the meter display falls within the acceptable range indicated.  
If the meter fails any of these tests, it needs calibration adjustment or repair.  
Testing the Display  
Turning the meter on from the “OFF” position, the meter will full display all segment and symbols.  
Compare the display with the example in Figure 2.  
LCD Graphics 61-340 / 61-342  
Figure 2 Display Test  
Form Number TM61340-2  
Rev 2 November 2007  
 
Page 14  
Testing the Voltage Function (for 61-340 / 61-342)  
To verify accuracy in the AC and DC voltage ranges, do the following:  
1. Turn the rotary switch to “  
” position.  
2. Connect the calibrator to the  
and COM inputs on the meter.  
3. Set the calibrator for the voltage from step 1 to 7 in Table 1.  
4. Compare the reading on the meter display with the display reading shown in Table 1.  
5. If the display reading falls outside of the range shown in Table 1, the meter does not meet  
specification.  
Table 1 DC Voltage Test:  
Range  
400mV  
400mV  
400mV  
4V  
Step  
Input  
-300.0mV  
4.0mV  
Reading  
1
2
3
4
5
6
7
-297.3 to -302.7  
3.6 to 4.4  
300.0mV  
3.000V  
30.00V  
300.0V  
1000V  
297.3 to 302.7  
2.975 to 3.025  
29.75 to 30.25  
40V  
400V  
297.5 to 302.5  
987 to 1013  
1000V  
1. Turn the rotary switch to position. “  
2. Set the calibration for the voltage and frequency from step 1 to 10 in Table 2.  
3. Compare the reading on the meter display with the display reading shown in Table 2.  
4. If the display reading falls outside of the range shown in Table 2, the meter does not meet  
specification.  
Form Number TM61340-2  
Rev 2 November 2007  
 
Page 15  
Table 2 AC Voltage Test:  
Step  
Range  
Input  
300mV  
300mV  
Frequency  
Reading 61-340  
295.6 to304.4  
295.6 to304.4  
Reading 61-342  
1
2
400mV  
400mV  
60  
295.6 to304.4  
295.6 to304.4  
400  
4V  
3
4
3.000V  
3.000V  
30.00V  
30.00V  
300.0V  
300.0V  
750V  
60Hz  
400Hz  
60Hz  
2.965 to 3.035  
2.965 to 3.035  
29.65 to 30.35  
29.65 to 30.35  
296.5 to 303.5  
296.5 to 303.5  
736 to 764  
2.965 to 3.035  
2.965 to 3.035  
29.65 to 30.35  
29.65 to 30.35  
296.5 to 303.5  
296.5 to 303.5  
736 to 764  
4V  
40V  
5
40V  
6
400Hz  
60Hz  
400V  
400V  
750V  
750V  
7
8
400Hz  
60Hz  
9
10  
750V  
400Hz  
736 to 764  
736 to 764  
Testing the DC microamperes Function (for 61-340 and 61-342)  
To verify the accuracy of AC and DC current measurement functions, do the following:  
1. Connect the calibrator to the  
and COM inputs on the meter.  
2. Turn the rotary switch to  
a. Press the SELECT button to select the DC function  
3. Apply the inputs for steps 1-3 in Table 3a.  
4. For each input, compare the reading on the meter display to the reading for your meter in Table 3a  
5. If the display reading falls outside of the range shown in Table 3a, the meter does not meet  
specification.  
Table 3a DC microamperes Test:  
Range  
400µA  
400µA  
4000µA  
Step  
Source  
4.0µA  
Reading  
3.5 to 4.5  
1
2
3
300.0µA  
3000µA  
297.4 to 302.6  
2974 to 3026  
Testing the DC milli amperes Function (for 61-340 and 61-342)  
1. Connect the calibrator to the  
and COM inputs on the meter.  
2. Turn the rotary switch to  
.
a. Press the SEL button to select the DC function  
3. Apply the inputs for steps 1-4 in Table 3b.  
4. For each input, compare the reading on the meter display to the reading for your meter in Table 3b  
5. If the display reading falls outside of the range shown in Table 3b, the meter does not meet  
specification.  
Form Number TM61340-2  
Rev 2 November 2007  
 
Page 16  
Table 3b DC mA Test:  
Range  
40mA  
Step  
Source  
30.00mA  
300.0mA  
Reading  
1
2
29.73 to 30.27  
297.3 to 302.7  
400mA  
Testing the DC ampere Function (for 61-340 and 61-342)  
1. Connect the calibrator to the 10A and COM inputs on the meter.  
2. Turn the rotary switch to  
.
a. Press the SELECT button to select the DC function  
3. Apply the inputs for steps 1-2 in Table 3c.  
4. For each input, compare the reading on the meter display to the reading for your meter in Table 3c  
5. If the display reading falls outside of the range shown in Table 3c, the meter does not meet  
specification.  
Table 3c DCA Test:  
Range  
Step  
Source  
3.000A  
10.00A  
Reading  
4
1
2
2.950 to 3.050  
9.80 to 10.20  
10  
Testing the AC microampere Function (for 61-340 and 61-342)  
To verify the accuracy of AC and DC current measurement functions, do the following:  
1. Connect the calibrator to the  
and COM inputs on the meter.  
2. Turn the rotary switch to  
a. Press the SELECT button to select the AC function  
b. Press the REL button to make the display is zero  
3. Apply the inputs for steps 1-6 in Table 4a.  
4. For each input, compare the reading on the meter display to the reading for your meter in Table 4a  
5. If the display reading falls outside of the range shown in Table 4a, the meter does not meet  
specification.  
Table 4a AC microampere Test:  
Range  
400µA  
400µA  
400µA  
400µA  
4000µA  
4000µA  
Frequency  
60  
Step  
Source  
40µA  
Reading  
1
2
3
4
5
6
38.9 to 41.1  
38.9 to 41.1  
295.0 to 305.0  
295.0 to 305.0  
2950 to 3050  
2950 to 3050  
400  
40µA  
400  
300.0µA  
300.0µA  
3000µA  
3000µA  
400  
60  
400  
Form Number TM61340-2  
Rev 2 November 2007  
 
Page 17  
Testing the AC milliampere function: (for 61-340and 61-342)  
1. Connect the calibrator to the  
and COM inputs on the meter.  
2. Turn the rotary switch to  
.
a. Press the SELECT button to select the AC function  
b. Press the REL button to make the display is zero  
3. Apply the inputs for steps 1-4 in Table 4b.  
4. For each input, compare the reading on the meter display to the reading for your meter in Table 4b  
5. If the display reading falls outside of the range shown in Table 4b, the meter does not meet  
specification.  
Table 4b ACmA Test:  
Range  
40 mA  
Step  
Source  
30.00mA  
30.00mA  
300.0mA  
300.0mA  
Frequency  
60Hz  
Reading  
1
2
3
4
29.35 to 30.65  
29.35 to 30.65  
293.5 to 306.5  
293.5 to 306.5  
40 mA  
400Hz  
60Hz  
400 mA  
400 mA  
400Hz  
Testing the AC A function (for 61-340 / 61-342)  
1. Connect the calibrator to the 10A and COM inputs on the meter.  
2. Turn the rotary switch to  
.
a. Press the SELECT button to select the AC function  
b. Press the REL button to make the display is zero  
3. Apply the inputs for steps 1-4 in Table 4c.  
4. For each input, compare the reading on the meter display to the reading for your meter in Table 4c  
5. If the display reading falls outside of the range shown in Table 4c, the meter does not meet  
specification.  
Table 4c AC A Test:  
Step  
Source  
3.000A  
3.000A  
10A  
Frequency  
60Hz  
Reading  
4A  
4A  
1
2
3
4
2.920 to 3.080  
2.920 to 3.080  
9.70 to 10.30  
9.70 to 10.30  
400Hz  
60Hz  
10A  
10A  
10A  
400Hz  
Form Number TM61340-2  
Rev 2 November 2007  
 
Page 18  
Testing the Resistance Function (for 61-340 / 61-342)  
To verify the accuracy of the resistance function, do the following:  
1. Connect the calibrator to  
and COM on the meter.  
2. Turn the rotary switch to  
.
a. Press the SELECT button to select the function  
3. Apply the inputs for step 1-7 in Table 5.  
4. Compare the meter display readings to the display readings in Table 5.  
5. If the display reading falls outside of the range shown in Table 5, the meter does not meet  
specification.  
Table 5 Resistance Test:  
Range  
400*  
400*  
4kΩ  
Step  
Source  
4.0Ω  
Reading  
3.5 to 4.5  
1
2
3
4
5
6
7
300.0Ω  
295.9 to 304.1  
2.968 to 3.032  
29.68 to 30.32  
296.8 to 303.2  
2.968 to 3.032  
29.35 to 30.65  
3.000KΩ  
30.00KΩ  
300.0KΩ  
3.000MΩ  
30.00MΩ  
40kΩ  
400kΩ  
4MΩ  
40MΩ  
*Lead resistance on the 400range is not included in error.  
Testing the Capacitance Function (for 61-340 / 61-342)  
The meter measures capacitance by charging the capacitor with a known direct current, measuring the  
resultant voltage, and calculating the capacitance. If the same capacitance is measured on an  
impedance bridge, a different reading may result. This variance is likely to be greater at higher  
frequencies.  
To verify the accuracy of the capacitance measuring function, do the Following:  
1. Apply the capacitor to the  
and COM inputs on the meter. For steps 1 through 7 in Table 6.  
2. Turn the rotary switch to  
.
a. Press the SELECT button to select the  
function  
b. Press the REL button to make the display is zero  
3. Compare the reading on the meter display to the reading in Table 6.  
4. Note : The meter selects the proper range automatically. Each measurement takes about one  
second per range, readings >40.00μF will take 5 to 30 seconds  
5. If the display reading falls outside of the range shown in Table 6, the meter does not meet  
specification.  
Form Number TM61340-2  
Rev 2 November 2007  
 
Page 19  
Table 6 Capacitance Test:  
Range  
40nF  
Step  
Source  
10.000nF  
30.00nF  
300.0nF  
3.000µF  
30.00µF  
100.0µF  
1000µF  
Reading  
1
2
3
4
9.60 to 10.40  
29.00 to 31.00  
290.5 to 309.5  
2.905 to 3.095  
29.05 to 30.95  
79.5 to 120.5  
795 to 1205  
40nF  
400nF  
4µF  
5
6
7
40.00µF  
100.0µF  
1000µF  
Checking the Diode Test Function (for 61-340 / 61-342)  
To check the diode test function, do the following:  
1. Connect the DVM (Digital Voltage Meter) to the  
and COM inputs on the meter.  
2. Turn the meter’s rotary switch to  
.
Press the SELECT button to select the  
function  
The DVM display should display OL  
3. Insert a Si diode with correct polarity “+” and “-“  
The meter display should read within 0.5~0.7Vdc  
4. Reverse polarity on the Si diode  
The meter display should read OL  
.
Checking the Continuity Function (for 61-340 / 61-342)  
To check the diode test function, do the following:  
1. Connect the DVM (Digital Voltage Meter) to the  
and COM inputs on the meter.  
2. Turn the meter’s rotary switch to  
.
a) Press the SELECT button to select the  
b) The DVM display should display OL  
3. Insert a 50resistor  
function  
a) The meter inner beeper will sound  
Form Number TM61340-2  
Rev 2 November 2007  
 
Page 20  
Testing the Frequency Function (for 61-340 / 61-342)  
To verify the accuracy of the meter’s frequency function, do the following:  
1. Connect the calibrator to the  
and COM inputs on the meter.  
2. Note: The accuracy of the calibrator’s frequency function must be appropriate for the specified  
accuracy of the meter.  
3. Set the rotary switch to  
.
4. Set the calibrator or function generator for the square wave voltage and frequency for steps 1-6 of  
Table 7a.  
5. Compare the reading on the meter display with the display reading shown in Table 7a.  
6. If the display reading falls outside of the range shown in Table 7a, the meter does not meet  
specification.  
Table 7a Frequency Test:  
Range  
100Hz  
100Hz  
1kHz  
Step  
Source  
9.0Hz  
90Hz  
Level  
3V rms  
3V rms  
Reading  
1
2
3
4
5
6
8.987 to 9.013  
89.87 to 90.13  
898.7 to 901.3  
8.987 to 9.013  
89.87 to 90.13  
898.7to 901.3  
3V rms  
3V rms  
3V rms  
3V rms  
900Hz  
9kHz  
10kHz  
100kHz  
1MHz  
90kHz  
900kHZ  
Testing the Duty Cycle Function (for 61-340 / 61-342)  
To verify the accuracy of the meter’s frequency function, do the following:  
1. Connect the calibrator to the  
and COM inputs on the meter.  
2. Note: The accuracy of the calibrator’s frequency function must be appropriate for the specified  
accuracy of the meter.  
3. Set the rotary switch to  
.
a. Press the Hz/DUTY button to select the DUTY CYCLE function  
4. Set the calibrator or function generator for the square wave voltage and frequency as Table 7b.  
5. Compare the reading on the meter display with the display reading shown in Table 7b.  
6. If the display reading falls outside of the range shown in Table 7b, the meter does not meet  
specification.  
Table 7b Duty Cycle Test:  
Range  
1kHz  
Step  
1
Source  
1kHz  
Level  
Reading  
3V rms  
48.3% to 51.7%  
Form Number TM61340-2  
Rev 2 November 2007  
 
Page 21  
Testing the Temperature Function (for 61-340 / 61-342)  
To verify the accuracy of the meter’s temperature function, do the following:  
1. Connect the calibrator to the  
and COM inputs on the meter.  
2. Set the rotary switch to the ºF / ºC as instructed in Table 8.  
3. Set the calibrators temperature output to the source values in Table 8, for steps 1-7.  
4. Compare the reading on the meter display with the display reading shown in Table 8.  
5. If the display reading falls outside of the range shown in Table 8, the meter does not meet  
specification.  
Table 8 Temperature Test:  
Range  
ºC  
Step  
Source  
0 ºC  
Reading  
-3 to 3  
1
2
3
4
5
6
7
ºC  
-20 ºC  
300 ºC  
750 ºC  
-4 ºF  
-23 to –17  
288 to 312  
725 to 775  
-9 to 1  
ºC  
ºC  
ºF  
ºF  
32 ºF  
27 to 37  
ºF  
1382 ºF  
1338 to 1426  
Form Number TM61340-2  
Rev 2 November 2007  
 
Page 22  
Calibration Procedure  
Recalibrate your meter:  
It is recommended that the multimeter be calibrated once each year.  
1. Perform calibration at an ambient temperature of 23°C±2°C and a relative humidity of <70%  
Disconnect the test leads and turn the meter off. Remove the test leads from the front terminals.  
2. Position the meter face down. Remove the battery cover screw and the 2 bottom case cover screws.  
3. Lift the end of the bottom case cover until it gently unsnaps from the case top at the end nearest the  
LCD.  
(A) DC V Calibration (Adjust VR1)  
1. Set the rotary switch to position “  
for the DC Volts function.  
2. Set the output of DC calibrator for 300.0mV and connect to  
meter.  
and COM input terminals on  
3. Using a small flat-tipped screwdriver, adjust VR1 until the display reads 299.5 to 300.5mV  
4. Disconnect the DC calibrator from the meter.  
(B) AC V Calibration (Adjust VR2)  
Model 61-340:  
1. Set the rotary switch to position. “  
” for the AC Volts function.  
2. Set the output of the calibrator for 3.000V at 60Hz and connect to  
terminals on meter.  
and COM input  
3. Using a small flat-tipped screwdriver, adjust VR2 until the display reads 2.995 to 3.005Volts  
4. Disconnect the AC calibrator from the meter.  
Model 61-342:  
1. Set the rotary switch to position. “  
” and press SELECT button to select AC A function,  
then press RANGE button to select 10A range .  
2. Using a small flat-tipped screwdriver, adjust VR4 until the display reads 0 to 3 digits.  
3. Press RANGE button to select 4A range and adjust VR5 until the display reads same as the  
digits at AC 10A range ( 0 to 3 digits)  
4. Set the rotary switch to position. “  
” for the AC Volts Function.  
5. Set the output of the calibrator for 3.000V at 60Hz. and connect to  
terminals on meter.  
and COM input  
Form Number TM61340-2  
Rev 2 November 2007  
 
Page 23  
6. Using a small flat-tipped screwdriver, adjust VRtr until the display reads 2.995 to 3.005Volts  
7. Disconnect the AC calibrator from the meter.  
(C) TEMP Calibration (Adjust VR3)  
1. Set the rotary switch to the " ºF/ ºC " position.  
2. Set the output of the calibrator to 300 ºC  
3. Connect the calibrator temperature output to the  
and COM input terminals  
4. Using a small flat-tipped screwdriver to adjust VR3 for a 300 ºC +/- 1 ºC (299 to 301) display  
Form Number TM61340-2  
Rev 2 November 2007  
 

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