IDEAL INDUSTRIES, INC. TECHNICAL MANUAL MODEL

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: 3. Date: January 2008
Form Number TM61340-2
Rev 3 January 2008
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
Form Number TM61340-2
Rev 3 January 2008
22/23
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:
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 (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 3 January 2008
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 3 January 2008
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 3999
Numeric update rate
2.5 times / sec
Polarity display
Automatic
Over range display
“OL” is displayed
Low battery indicator
Automatic power-off time
is indicated
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
µA /mA connector
µA, mA, Temp
Temperature Coefficient
0.1×(Spec. Accuracy) per °C, <18°C or >28°C
Battery Life
Alkaline 9V,
Alkaline 9V,
Form Number TM61340-2
,V
,
Rev 3 January 2008
,
,
,
, Hz
200 hours for 61-340
150 hours for 61-342
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)
Accuracy
Over voltage
protection
Range
Resolution
400.0mV
0.1mV
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
4.000V
1mV
40.00V
10mV
±(1.5% + 5)
900VDC or 750VAC
400.0V
100mV
600V
1V
±(0.5% reading + 5 digits)
900VDC or 750VAC
Input Impedance: 10M!
(2) AC Volts (61-340/61-342)
Input Impedance: 10M!
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: 40Д400Hz
(3a) DC micro-amp and milli-amps (for 61-340 / 61-342)
Range
Resolution
400.0µA
0.1"A
4000µA
1"A
40.00mA
10"A
400.0mA
0.1mA
Accuracy
Input Protection
±(0.5% reading + 5 digits)
500mA, 600V Fast
Blow Fuse
Overload Protection: mA Input: 500mA, 600V Fast Blow fuse. (61-340 / 61-342)
Form Number TM61340-2
Rev 3 January 2008
Page 5
(3b) DC Current (61-340 / 61-342)
Range
Resolution
4.000A
0.001A
10.00A*
0.01A
Accuracy
Input Protection
±(1.5% reading + 5 digits)
10A, 500V Fast Blow
Fuse
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)
Range
Resolution
Accuracy
400.0µA
0.1"A
4000µA
1"A
±(1.5% reading + 5 digits) **
40Hz ~ 400Hz
40.00mA
10"A
400.0mA
0.1mA
±(2.0% reading + 5 digits) **
40Hz ~ 400Hz
Input Protection
500mA, 500V Fast
Blow Fuse
Overload Protection: "A / mA Input: 500mA, 500V Fast Blow fuse. (61-340 / 61-342)
(4b) AC Current (61-340 / 61-342)
Range
Resolution
Accuracy
Input Protection
4.000A
0.001mA
10.00A*
0.01mA
±(2.5% reading + 5 digits) **
40Hz ~ 400Hz
10A, 500V Fast Blow
Fuse
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 3 January 2008
Page 6
(5) Resistance (for 61-340 / 61-342)
Over voltage
protection
Range
Resolution
Accuracy
400.0! **
0.1!
±(1.2% reading + 5 digits)
4.000K!
1!
40.00K!
10!
400.0K!
100!
4.000M!
1K!
±(1.2% reading + 2 digits)
40.00M! ***
10K!
±(2.0% reading + 5 digits)
±(1.0% reading + 2 digits)
600Vrms
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)
Range
Resolution
Accuracy
Max. Test
Current
Max. Open
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)
Range
Resolution
Accuracy
40.00nF
10pF
±(3.0% reading + 10 digits)
400.0nF
100pF
4.000"F
1nF
40.00"F
10nF
400.0"F
100nF
4000"F **
10"F
±(3.0% reading + 5 digits)
Over voltage
Protection
600Vrms
±(20% reading + 5 digits) ***
** 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 >40.00"F will take 8 seconds or greater
Form Number TM61340-2
Rev 3 January 2008
Page 7
(8) Frequency (for 61-340 / 61-342)
Range
Resolution
10.00Hz
0.01Hz
100.0Hz
0.1Hz
1.000KHz
1Hz
10.00KHz
10Hz
100.0KHz
100Hz
1.000MHz
10KHz
10.000MHz
10KHz
Sensitivity
Accuracy
Overload
protection
0.7V rms
Frequency:
(± 0.1% + 3 digit)
600V rms
5.0V rms
(9) Temperature: Type K thermocouple (for 61-340 / 61-342)
Range
Resolution
Accuracy
-50 to 800 ºC
1ºC
±3.0% ± 3 ºC
-58 to1500 ºF
1ºF
±3.0% ± 5 ºF
Overload
protection
Not Specified
(10) Auto Power Off (APO)
If the meter is idle for more than
10 minutes, the meter automatically turns the power off.
(11) Data Hold/Backlight
Pressing this button for less than 2 seconds, the meter enters the data hold mode, the
HOLD
symbol
appears on the LCD, and the momentary value while pressing the button is displayed on the LCD. Press it
again to exit this mode and the
HOLD
symbol disappears on the display. As the data hold function, this
button has no effect on the diode and continuity test functions. The secondary function of this button is to
enable and disable the backlight. If you press this button for more than 2 seconds, the backlight will turn on
and when you press it again for more than 2 seconds, the backlight will turn off.
(12) SELECT
There are positions on the rotary switch that have several functions. Pressing the SELECT button will select
the function you want in each position. It allows you to select AC or DC current, resistance, diode, audible
continuity, capacitance, ദ or ബ temperature measurement.
(13) RANGE
When powered on, the meter is in auto range mode. Pressing the RANGE button, you can select the
measurement range you want. The range goes up with each press of the RANGE button until its max, then
returns to the min range. Pressing the RANGE button for more than 2 seconds, the meter will return to auto
range. This button has no effect on frequency, duty cycle, capacitance, diode & continuity tests and
temperature measurement.
Form Number TM61340-2
Rev 3 January 2008
Page 8
(14) REL
Press this button to have the meter enter relative measuring state and the “#” symbol will appear on the LCD.
The result of the relative measurement is the difference between the measuring value and the
reference value. The reference value is produced as the same as momentary reading value when
pressing this button. Press it again to exit this state and the “#” symbol will disappear on the display. This
button does not any effect on the frequency, diode and continuity test function. Pressing this button for less
than 2 seconds, the meter enters the relative measuring state and the “#” symbol appears on the LCD.
(15) Hz/DUTY
Press this button to switch between Hz and Duty Cycle test modes while taking AC voltage or AC current
measurements.
(16) MAX/MIN
Press the MAX/MIN button on the meter to enter maximum value / minimum value record mode and the
“MAX” / “MIN” symbol will appear on the display. The maximum, or minimum, value since pressing the button
will be displayed. Press the MAX/MIN button again for more than 2 seconds to exit this mode and the “MAX”
/ “MIN” symbol will disappear from the display. This button has no effect on the diode / continuity test function,
capacitance measurement, or frequency measurement.
Form Number TM61340-2
Rev 3 January 2008
Page 9
Physical and Environmental Characteristics
Characteristics
Description
Dimensions (H×W×D)
180mm(H) ×91mm (W) ×43mm(D) (with holster)
7.1” (H) x 3.6”(W) x1.7”(D)
Weight (with battery& holster)
0.379Kg (13.4 oz.)
Environmental characteristics
Description
Temperature operating
0 to +40°C
Non-Operating
-20 to +60°C <75% R.H.
Humidity (operating)
<70% R.H.
Altitude
6561.7 Ft. (2000m)
Indoor Use
Indoor Use
Certifications and compliances
Safety
Complies with UL 61010B-1
Input Safety Rating
V / !: , UL 61010B-1, UL 61010-B-2-031, EU 61010-1
EN61010-2-031, Cat IV 600Volts, Cat III 1000V
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.
Pollution Degree 2
Do not operate in environments where conductive
pollutants may be present.
EC Declaration
of Conformity
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 specifications as listed in the official Journal of the European Communities:
En 55011 Class A: Radiated and Conducted
Emissions.
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 3 January 2008
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
Calibrator
Required Characteristics
AC Voltage Range: 0 ~ 750V AC
Accuracy: ±0.07% (Basic)
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! ~ 100M!
Accuracy: ±0.03% (Basic)
Capacitance Range: 1pF ~ 10mF
Accuracy: ±0.10% (Basic)
Form Number TM61340-2
Rev 3 January 2008
Recommended Model
Fluke 5500 or Wavetek
9100 Calibrator or
equipment
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 short 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 and 61-342 are both powered by a 9V battery. 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 3 January 2008
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, 500V Fast Blow Fuse
F342: 10A, 500V Fast Blow Fuse
Fuse Replacement
The 61-340 and 61-342 are fused in both the "A /mA input and 10 amperes input ports.
The "A /mA input port is fused by F340: 500mA, 500V Fast Blow fuse. The 10A input port is fused by
F342: 10A, 500V 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. Replace the back case cover. Reinsert the case screws. It is recommended you replace the
old battery with a 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 3 January 2008
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 3 January 2008
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 the
2. Connect the calibrator to the
position.
and COM inputs on the meter.
3. Set the calibrator for the voltage in steps 1 - 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:
Step
Range
Input
Reading
1
400mV
-300.0mV
-302.0 to -298.0
2
400mV
4.0mV
3.5 to 4.5
3
400mV
300.0mV
298.0 to 302.0
4
4V
3.000V
2.980 to 3.020
5
40V
30.00V
29.80 to 30.20
6
400V
300.0V
298.0 to 302.0
7
600V
500V
492 to 508
1. Turn the rotary switch to the
position.
2. Set the calibration for the voltage and frequency in steps 1 - 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 3 January 2008
Page 15
Table 2 AC Voltage Test:
Step
Range
Input
Frequency
Reading
1
400mV
300.0mV
60Hz
295.0 to305.0
2
400mV
300.0mV
400Hz
295.0 to305.0
3
4V
3.000V
60Hz
2.950 to 3.050
4
4V
3.000V
400Hz
2.950 to 3.050
5
40V
30.00V
60Hz
29.50 to 30.50
6
40V
30.00V
400Hz
29.50 to 30.50
7
400V
300.0V
60Hz
295.0 to 305.0
8
400V
300.0V
400Hz
295.0 to 305.0
9
750V
600V
60Hz
586 to 614
10
750V
600V
400Hz
586 to 614
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
2. Turn the rotary switch to the
and COM inputs on the meter.
position. 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:
Step
Range
Source
Reading
1
400µA
4.0µA
3.5 to 4.5
2
400µA
300.0µA
298.0 to 302.0
3
4000µA
3000µA
2980 to 3020
Testing the DC milli amperes Function (for 61-340 and 61-342)
1. Connect the calibrator to the
2. Turn the rotary switch to the
and COM inputs on the meter.
position. Press the SELECT button to select the DC function.
3. Apply the inputs for steps 1 - 2 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 3 January 2008
Page 16
Table 3b DC mA Test:
Step
Range
Source
Reading
1
40mA
30.00mA
29.80 to 30.20
2
400mA
300.0mA
298.0 to 302.0
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 the
position. 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:
Step
Range
Source
Reading
1
4A
3.000A
2.950 to 3.050
2
10A
9.00A
8.82 to 9.18
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
2. Turn the rotary switch to the
and COM inputs on the meter.
position. Press the SELECT button to select the AC function.
Press the REL button to make sure 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:
Step
Range
Source
Frequency
Reading
1
400µA
40.0µA
60Hz
38.9 to 41.1
2
400µA
40.0µA
400Hz
38.9 to 41.1
3
400µA
300.0µA
60Hz
295.0 to 305.0
4
400µA
300.0µA
400Hz
295.0 to 305.0
5
4000µA
3000µA
60Hz
2950 to 3050
6
4000µA
3000µA
400Hz
2950 to 3050
Form Number TM61340-2
Rev 3 January 2008
Page 17
Testing the AC milliampere function: (for 61-340and 61-342)
1. Connect the calibrator to the
2. Turn the rotary switch to the
and COM inputs on the meter.
position. Press the SELECT button to select the AC function.
Press the REL button to make sure 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:
Step
Range
Source
Frequency
Reading
1
40 mA
30.00mA
60Hz
29.35 to 30.65
2
40 mA
30.00mA
400Hz
29.35 to 30.65
3
400 mA
300.0mA
60Hz
293.5 to 306.5
4
400 mA
300.0mA
400Hz
293.5 to 306.5
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 the
position. Press the SELECT button to select the AC function.
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
Range
Source
Frequency
Reading
1
4A
3.000A
60Hz
2.920 to 3.080
2
4A
3.000A
400Hz
2.920 to 3.080
3
10A
9.00A
60Hz
8.73 to 9.27
4
10A
9.00A
400Hz
8.73 to 9.27
Form Number TM61340-2
Rev 3 January 2008
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
2. Turn the rotary switch to the
and COM on the meter.
position. 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:
Step
Range
Source
Reading
1
400!*
4.0!
3.5 to 4.5
2
400!*
300.0!
295.9 to 304.1
3
4k!
3.000K!
2.968 to 3.032
4
40k!
30.00K!
29.68 to 30.32
5
400k!
300.0K!
296.8 to 303.2
6
4M!
3.000M!
2.962 to 3.038
7
40M!
30.00M!
29.35 to 30.65
*Lead resistance on the 400! range 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
2. Turn the rotary switch to the
and COM inputs on the meter. For steps 1 - 7 in Table 6.
position. Press the SELECT button to select the
function.
Press the REL button to make sure the display is zero.
3. Apply the inputs for step 1 - 7 in Table 6.
Note: The meter selects the proper range automatically. Each measurement takes about one
second per range, readings >40.00"F will take $ 5 to 30 seconds.
4. Compare the meter display readings to the display readings in Table 6.
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 3 January 2008
Page 19
Table 6 Capacitance Test:
Step
Range
Source
Reading
1
40nF
10.00nF
9.60 to 10.40
2
40nF
30.00nF
29.00 to 31.00
3
400nF
300.0nF
290.5 to 309.5
4
4µF
3.000µF
2.905 to 3.095
5
40.00µF
30.00µF
29.05 to 30.95
6
400.0µF
300.0µF
239.5 to 360.5
7
4000µF
3000µF
2395 to 3605
Checking the Diode Test Function (for 61-340 / 61-342)
To check the diode test function, do the following:
1. Connect the test leads to the
and COM inputs on the meter.
2. Turn the meter’s rotary switch to the
the
position. Press the SELECT button to select
function. The 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 test leads to the
2. Turn the meter’s rotary switch to the
and COM inputs on the meter.
position. Press the SELECT button to select the
The display should display OL.
3. Insert a 20! resistor. The meter’s internal beeper will sound.
Form Number TM61340-2
Rev 3 January 2008
function.
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
2.
3.
4.
5.
and COM inputs on the meter.
Note: The accuracy of the calibrator’s frequency function must be appropriate for the specified
accuracy of the meter.
Set the rotary switch to the
position.
Set the calibrator or function generator for the square wave voltage and frequency for steps 1 - 6 of
Table 7a.
Compare the reading on the meter display with the display reading shown in Table 7a.
If the display reading falls outside of the range shown in Table 7a, the meter does not meet
specification.
Table 7a Frequency Test:
Step
Range
Source
Level
Reading
1
100Hz
9.0Hz
3V rms
8.988 to 9.012
2
100Hz
90Hz
3V rms
89.88 to 90.12
3
1kHz
900Hz
3V rms
898.8 to 901.2
4
10kHz
9kHz
3V rms
8.988 to 9.012
5
100kHz
90kHz
3V rms
89.88 to 90.12
6
1MHz
900kHZ
3V rms
898.8 to 901.2
7
10MHz
9.00MHZ
5V rms
8.97 to 9.03
Testing the Duty Cycle Function (for 61-340 / 61-342)
To verify the accuracy of the meter’s frequency function, do the following:
1.
2.
3.
4.
5.
Connect the calibrator to the
and COM inputs on the meter.
Note: The accuracy of the calibrator’s frequency function must be appropriate for the specified
accuracy of the meter.
Set the rotary switch to the
position. Press the Hz/DUTY button to select the DUTY CYCLE
function
Set the calibrator or function generator for the square wave voltage and frequency in Table 7b.
Compare the reading on the meter display with the display reading shown in Table 7b.
If the display reading falls outside of the range shown in Table 7b, the meter does not meet
specification.
Table 7b Duty Cycle Test:
Step
Range
Source
Level
Reading
1
1kHz
1kHz
3V rms
48.3% to 51.7%
Form Number TM61340-2
Rev 3 January 2008
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 position. Press the SELECT button to select the proper range as
listed in Table 8.
3. Set the calibrators temperature output to the source for steps 1 - 7 in Table 8.
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:
Step
Range
Source
Reading
1
ºC
-20 ºC
-23 to -17
2
ºC
0 ºC
-3 to 3
3
ºC
300 ºC
288 to 312
4
ºC
750 ºC
725 to 775
5
ºF
-4 ºF
-9 to 1
6
ºF
32 ºF
26 to 38
7
ºF
1382 ºF
1336 to 1428
Form Number TM61340-2
Rev 3 January 2008
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%.
2. Disconnect the test leads and turn the meter off. Remove the test leads from the front terminals.
3. Position the meter face down. Remove the battery cover screw and the 2 bottom case cover screws.
4. 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 the
position for the DC Volts function.
2. Set the output of the calibrator for 300.0mV and connect to the
and COM inputs on meter.
3. Using a small flat-tipped screwdriver, adjust VR1 until the display reads 299.5 to 300.5mV.
4. Disconnect the calibrator from the meter.
(B) AC V Calibration (Adjust VR2)
Model 61-340:
1. Set the rotary switch to the
position for the AC Volts function.
2. Set the output of the calibrator for 3.000V at 60Hz and connect to the
meter.
and COM inputs on
3. Using a small flat-tipped screwdriver, adjust VR2 until the display reads 2.995 to 3.005Volts.
4. Disconnect the calibrator from the meter.
Model 61-342:
1.
Set the rotary switch to the
position. Press the SELECT button to select AC A function, then
press RANGE button to select the 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 the 4A range and adjust VR5 until the display reads same as the
digits at the AC 10A range (0 to 3 digits).
4. Set the rotary switch to the
position for the AC Volts Function.
5. Set the output of the calibrator for 3.000V at 60Hz. and connect to the
and COM input terminals
on meter.
6. Using a small flat-tipped screwdriver, adjust VR2 until the display reads 2.995 to 3.005Volts
7. Disconnect the calibrator from the meter.
Form Number TM61340-2
Rev 3 January 2008
Page 23
(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, adjust VR3 for a 300 ºC +/- 1 ºC (299 to 301) display.
Form Number TM61340-2
Rev 3 January 2008
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