IDEAL INDUSTRIES 61-312 User manual

IDEAL INDUSTRIES, INC.
TECHNICAL MANUAL
MODELS: 61-312
61-314
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: TM61312-4
Revision: 2. Date: August 2007
Form Number TM61312-4 Rev 2 Aug 2007

Form Number TM61312-4 Rev 2 Aug 2007
TABL
Introduction
EOFCONTENTS Page
1
Precautions and Safety Information 1
Symbols 1
Safety 2
Specifications 3
General Specification 3
Measurement Characteristics 4
Voltage Specification 4
Current Specifications 5
R inuity, Capacitance Specificationsesistance, Diode, Cont 6
Frequency, Temperature Specification 7
Auto Power Off, Data Hold 7
P haracteristicshysical and Environmental C 8
Certifications and Compliances 8
Required Equipment 9
Basic Maintenance 10
Opening the Meter Case 10
Replacing the Battery 10
Replacing Fuses 11
Fuse Replacement 11
Cleaning 11
Performance Tests 12
Testing the Display 12
T unctionesting the Voltage F 13
T nsesting the DC Current Functio 14
T 14esting the AC Current Functions /15
Testing the Resistance Function 16
Tontinuity Functionsesting the Capacitance, Diode, C 17
T 17esting the Frequency Function /18
Testing the Temperature Function 18
Calibration 19
Calibrating Adjustment, DCV, ACV DCA and Temperature Functions 19/20

Form Number TM61312-4 Rev 2 Aug 2007
Page 1
Introduction
Warning
To av ures oid shock or injury, do not perform the verification tests or calibration proced
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 61-312 and 61-314 series contain parts that can be damaged by static discharge.
Follow the standard practices for handling static sensitive devices.
For add isititional information about IDEALINDUSTRIES, INC. and its products, and services, v
IDEAL INDUSTRIES, INC. web site at:
www.idealindustries.com
Precautions and Safety Information
Us
pr
pr
In
Ca
Th
e the meter only as described in the Service Manual. If you do not do so, the protection
ovided by the meter may be impaired. Read the “Safety Information” page before servicing this
oduct.
this manual, a Warning identifies conditions and actions that pose hazard (s) to the user; a
ution identifies conditions and actions that may damage the meter or the test instruments.
The Symbols
e symbols used on the meter and in this manual are explained in Table A.
Table A. The Symbols
Risk of electric shock
Refer to the manual. Important information.
DC measurement
Equipment protected by double or reinforced
insulation
Battery
Earth
AC measurement
Conforms to EU directives

Form Number TM61312-4 Rev 2 Aug 2007
Page 2
SAFETY
Re
an ied.
For operating instructions, see the 61-312 / 61-314 Digital Multimeter Instruction Manual.
view the following safety precautions to avoid injury and prevent damage to this product or
y products connected to it. To avoid potential hazards, use the product only as specif
CAUTION: These statements identify conditions or practices that could result in damage to
. the equipment or other property
WARNIN actices that could result in personal
injury or loss of life.
Use proper F 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 s marked on the meter.
El outside the range
specified for that connector.
Av or loss of life, do not connect or disconnect probes or test
leads while they are connected to a voltage source.
Do hock, 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.
G: These statements identify conditions or pr
use. To avoid fire hazard, use
not Exceed the maximum rated input limits, a
ectric overload. Never apply a voltage to a connector on the product that is
oid electric shock. To avoid injury
not operate in wet/damp conditions. To avoid electric s

Form Number TM61312-4 Rev 2 Aug 2007
Page 3
SPECIFICATIONS
Al
St tery
in
G
l specifications are warranted unless noted typical and apply to the 61-312 & 61-314
ated accuracies are at 23°C±5°C at less than 80% relative humidity and without the bat
dicator displayed.
eneral specifications
Characteristics Description
Display count 3 3/4 digit liquid crystal display, max count 3999
Numeric update rate 1.5 times / sec
Polarity display Automatic
Over range display “OL” is displayed
Low battery indicator is indicated
Automatic power-off time Automatic backlight off ≈15minutes
Power source
1.5V AAA ×2 battery for 61-312
9.0V battery: types- NEDA 1604, JIS006P, IEC6F22 fo
61-314
r
*Maximum input voltage 600Vrms CAT II between V and COM
*Maximum floating voltage 600Vrms CAT II between any terminal and earth ground
Maximum input current 400mA between mA and COM
Overload protection mA connector 500mA (250V) fast blow fuse.
Overload protection 10A connector 10A (250V) fast blow fuse.
V connector V, V, , , , , Hz, mA, Temp
Temperature Coefficient 0.1×(Spec. Accuracy) per °C, <18°C or >28°C
Battery Life Alkaline 1.5V×2 AA, ≈200 hours for 61-312 Alkaline 9V
200 hours for 61-314
, ≈

Form Number TM61312-4 Rev 2 Aug 2007
Page 4
Measurement Characteristics
Ac curacy is ±(% reading + number of digits) at 23°C ± 5°C, less than 80% R.H.
(1) DC Volts(for 61-312 / 61-314)
Range Resolution Accuracy Over voltage
protection
400.0mV 0.1mV
4.000V 1mV
40.00V 10mV
400.0V 100mV
600V 1V
±(0.8% reading + 4 digits) 600V rms
In put Impedance: 10MΩ
(2a) AC Volts (61-312 only)
Range Resolution Accuracy Over voltage
protection
4.000V 1mV
40.00V 10mV
400.0V 100mV
600V 1V
50-60Hz
1.2% + 5
40-400Hz
1.5% + 5 600V rms
Input Impedance: 4.5MΩ
AC
in
Conversion Type: 61-312: Average sensing rms indication calibrated to the sine wave
put.
(2b) AC Volts (61-314 only)
Range Resolution Accuracy Over voltage
Protection
4.000V 1mV
40.00V 10mV
400.0V 100mV
600V 1V
50-60Hz
1.2% + 8
40-400Hz
1.5% + 8 600V rms
Input Impedance: 4.5MΩ
AC onding,
ca
Cr
Conversion Type:61-314 model only: AC conversion is ac-coupled, True RMS resp
librated to a sinusoidal waveform
est Factor: C.F. = Peak/RMS
For non-sinusoidal waveform, C.F. > 2 add ±1% to accuracy,

Form Number TM61312-4 Rev 2 Aug 2007
Page 5
(3a) DC micro-amp and milli-amps (for 61-312 / 61-314)
Range Resolution Accuracy Input Prodection
400.0µA 0.1μA
4000µA 1μA
40.00mA 10μA
400.0mA 0.1mA
±(1.2% reading + 5 digits)* 500mA, 250V Fast
Blow Fuse
Overload Protection: mA Input: 500mA, 250V Fast Blow fuse. (61-312 / 61-314)
(3b) DC Current (61-312 / 61-314)
Range Resolution Accuracy Input Protection
4.000A .001mA
10.00A* .01mA
±(1.5% reading + 5 digits) 10A, 250V
Fast Blow Fuse
Overload Protection: A Input: 10A, 250V Fast Blow fuse. (61-312 / 61-314)
*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 damag
to the meter and/or the test leads.
.
e
(4a) AC micro-amp and milli-amps Current (61-312 / 61-314)
Range Resolution Accuracy Input Protection
400.0µA 0.1μA
4000µA 1μA
40.00mA 10μA
400.0mA 0.1mA
±(1.5% reading + 5 digits) *1
40Hz
~400Hz
500mA, 250V
Fast Blow Fuse
Overload Protection: mA Input: 500mA, 250V Fast Blow fuse. (61-312 / 61-314)
(4b) AC Current (61-312 / 61-314)
Range Resolution Accuracy Input Protection
4.000A .001mA
10.00A* .01mA
±(2.0% reading + 5 digits) *1
40Hz ~400Hz
10A, 250V
Fast Blow Fuse
AC
sin
*1t
fa
Overload Protection: A Input: 10A (250V) Fast Blow fuse.
Conversion Type: AC conversions are ac-coupled, true rms responding, calibrated to the
e wave input.
The specified accuracy is for sine wave at full scale and non-sine wave at half scale with cres
ctor 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 damag
to the meter and/or the test leads.
.
e

Form Number TM61312-4 Rev 2 Aug 2007
Page 6
(5) Resistance (for 61-312 / 61-314)
Range Resolution Accuracy Over voltage
protection
400.0Ω*10.1Ω
4.000KΩ1Ω
40.00KΩ10Ω
400.0KΩ100Ω
±(1.0% reading + 4 digits)
4.000MΩ1KΩ±(1.2% reading + 4 digits)
40.00MΩ*210KΩ±(1.5% reading + 5 digits)
250V rms
O
*1
*2
pen circuit Voltage: -1.5V approx.
< 5 digit of reading rolling.
< 2% of reading rolling.
(6) Diode Check and Continuity (for 61-312 / 61-314)
Range Resolution Accuracy Max. Test
Current
Max. Open
Circuit Voltage
1mV Not specified *<1mA, approx. 1.5V, approx.
O
Co
re
verload Protection: Not specified
ntinuity: Built-in buzzer sounds when resistance is less than approximately 30 Ωwith a
sponse time of approximately 100 msec.
(7) Capacitance (for 61-312 / 61-314)
Range Resolution Accuracy Over voltage
Protection
4.000nF *11pF
40.00nF 10pF
±(3% reading + 5 digits)
400.0nF 100pF
4.000μF 1nF
40.00μF 10nF
100μF 100nF
±(3% reading + 5 digits)
4.000mF *11μF
40.00mF *110μF ±(5% reading + 20 digits) *2
250V rms
*1ification.
*2< half full scale of range.
automatically. Each measurement takes about
In this range the accuracy is not applicable and the reading maybe rolling within spec
Specify reading
Note: The meter selects the proper range
one second per range. Readings >40.00μF will take ≈8 seconds or greater

Form Number TM61312-4 Rev 2 Aug 2007
Page 7
(8) Frequency (for 61-312 / 61-314)
Range Resolution Sensitivity Accuracy Overload
protection
10.00Hz .01Hz
100.0Hz .1Hz
1.000KHz 1Hz
10.00KHz 10Hz
100.0KHz 100Hz
1V rms
1.000MHz 1KHz
10.00MHz 10KHz 5V rms
Frequency:
(±0.3% + 4 digits) 250V rms
(9) Temperature: Type K thermocouple (for 61-312 / 61-314)
Range Resolution Accuracy Overload
protection
-20 to 300 ºC 1º ±1.0% + 4
301 to 750 ºC 1º ±3.0% + 5
-4 to 572 ºF 1º ±1.0% + 4
573 to 1382ºF 1º ±3.0% + 5
Not Specified
(10) Auto Power Off (APO)
If
Pr
Pr
the meter idles for more than ≈15 minutes, the meter automatically turns the power off.
(11) Data Hold
ess the HOLD button to freeze the reading in the display, “H” will appear on LCD display.
ess the HOLD button again to release the data hold function.

Form Number TM61312-4 Rev 2 Aug 2007
Page 8
Physical and Environmental Characteristics
Characteristics Description
Dimensions (H×W×D) 150mm(H) ×76mm (W) ×38mm(D) (with holster)
5.9” (H) x 3.0”(W) x1.5”(D)
Weight (with battery& holster) 0.219Kg (7.1 oz.)
Environmental characteristics Description
Temperature operating 0 to +40°C
Non-Operating -20 to +60°C <80% R.H.
Humidity (operating) <70% R.H.
Altitude 6561.7 Ft. (2000m)
Indoor Use Indoor Use
S
Certifications and compliances
afety Complies with UL 61010B-1
Input Safety Rating V / Ω/Temp/mA, 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
teleco
CAT I: Signal level, special equipment or parts of equipment,
mmunication, electronics.
Pollution Degree 2 Do not operate in environments where conductive
Pollutants may be present.
E
o
ecifications
A: Radiated and Conducted Emissions.
atic Discharge
electrical equipment for
C Declaration
f 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 sp
as listed in the official Journal of the European Communities:
En 55011 Class
En 50082-1 Immunity:
IEC 801-2 Electrost
IEC 801-3 RF Radiated
En 61010-1 Safety requirements for
measurement, control, and laboratory use.

Form Number TM61312-4 Rev 2 Aug 2007
Page 9
Required Equipment
Re
eq
Re
Ta
quired equipment is listed in Table B. If the recommended models are not available,
uipment with equivalent specifications may be used.
pairs or servicing should be performed only by qualified personnel.
ble B. Required Equipment
Equipment Required Characteristics Recommended Model
Calibrator 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% (B
DC: ±0
asic)
.02% (Basic)
Source: 5.00Hz ~100MHz
:0.5V p-p ~1.0V p-p (square wave)
e: 1Ω~100MΩ
:±0.03% (Basic)
:±0.10% (Basic)
Frequency
Accuracy: ±0.001%
Amplitude
Accuracy: ±5%
Resistance Rang
Accuracy
Capacitance Range: 1pF ~10mF
Accuracy
Fluke 5500 or Wavetek
9100 Calibrator or
equipment

Form Number TM61312-4 Rev 2 Aug 2007
Page 10
Basic Maintenance
Warning
To ing
th
avoid shock, remove the test leads and any input signals before opening the case or replac
e battery or fuses.
Opening the Meter Case
Caution
To ctive
su
e
Th
Th
avoid unintentional shock circuit, always place the uncovered meter assembly on a prote
rface. 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 th
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
e 61-312 Meter is powered by (2) AAA 1.5V batteries,
e 61-314 Meter is powered by (1) 9V battery, types are, NEDA 1604, JIS006P, IEC 6F22
1. Remove the rubber holster
2. Remove the two screws on the battery cover and open the battery cover
3. Unsnap or remove the old battery(s) and snap or install the new battery(s)
4. Return the battery cover and reinstall the two battery cover screws.
5. Replace the rubber boot.
Battery and Fuse Replacement
Figure 1

Form Number TM61312-4 Rev 2 Aug 2007
Page 11
Replacing Fuses
Warning
To av
batte
follow
oid electrical shock, remove the test leads and any input signals before replacing the
ry or fuses. To prevent damage or injury, INSTALL ONLY quick acting fuses with the
ing Volt/Amp current interrupt rating:
F312: 500mV, 250V Fast Blow Fuse
F314: 10A, 250V Fast Blow Fuse
Fuse Replacement
The 61-312 and 61-314 are fused in both the VmA input and 10A input port.
The VmA input port is fused by a F312: 500mV, 250V FAST BLOW fuse.
The 10A input port is fused by F314: 10A, 250V FAST BLOW fuse.
1. Remove the rubber holster
2. Remove the two screws on the battery cover and open the battery cover
3. Remove the two screws under the battery cover.
4. Unsnap or remove 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(s) with new battery(s).
7. Return the battery cover and reinstall the two battery cover screws.
8. Replace the rubber boot.
*CA
sp
UTION: Use only a fuse with the amperage, interrupt voltage, and speed rating
ecified.
Cleaning
Warning
To av d
dama
oid electrical shock or damage to the meter, never allow water inside the case. To avoi
ging the meter’s housing, never apply solvents to the meter.

Form Number TM61312-4 Rev 2 Aug 2007
Page 12
Performance Tests
Th
ac
Fo nual.
Accuracy specifications are valid for a period of one year after calibration, when measured at an
op
To erform the following tests, it is not necessary to open the case, no adjustments are
ne ne if
th
If the meter fails any of these tests, it needs calibration adjustment or repair.
esting the Display
Check display as unit is powered up. You may need to power up and down several times to
co
LCD Graphics 61-312 / 61-314
e following performance tests verify the complete operability of the meter and check the
curacy of each meter function against the meter’s specifications.
r operating instructions, see the 61-312 / 61-314 Digital Multimeter Instruction Ma
erating temperature of 18°C to 28°C and a maximum of 80% relative humidity.
p
cessary, merely make the required connections, apply the designated inputs, and determi
e reading on the meter display falls within the acceptable range indicated.
T
nfirm display segments and HOLD indicator.
Figure 2 Display Test

Form Number TM61312-4 Rev 2 Aug 2007
Page 13
Testing the Voltage Function (for 61-312 / 61-314)
To verify accuracy in the AC and DC voltage ranges, do the following:
1. Turn the rotary switch to “V” position.
Press the SEL Button to select the DC function
2. Connect the calibrator to the VHz and COM inputs on the meter.
3. Set the calibrator for the voltage and frequency for steps 1 through 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 -297.2 to –302.8
2 400mV 4.0mV 3.6 to 4.4
3 400mV 300.0mV 297.2 to 302.8
4 4V 3.000V 2.972 to 3.028
5 40V 30.00V 29.72 to 30.28
6 400V 300.0V 297.2 to 302.8
7 600V 600V 591 to 609
6. Turn the rotary switch to position. “V ”
Press the SEL Button to select the AC function
7. Set the calibration for the voltage for steps 1 through 10 in Table 2.
8. Compare the reading on the meter display with the display reading shown in Table 2.
9. If the display reading falls outside of the range shown in Table 2, the meter does not
meet specification.

Form Number TM61312-4 Rev 2 Aug 2007
Page 14
Table 2 AC Voltage Test:
Step Range Input Frequency Reading 61-312 Reading 61-314
1 4V 3.000V 60Hz 2.959 to 3.041 2.959 to 3.041
2 4V 3.000V 400Hz 2.950 to 3.050 2.947 to 3.053
3 40V 30.00V 60Hz 29.59 to 30.41 29.59 to 30.50
4 40V 30.00V 400Hz 29.50 to 30.50 29.47 to 30.53
5 400V 300.0V 60Hz 295.9 to 304.1 295.9 to 304.1
6 400V 300.0V 400Hz 295.0 to 305.0 294.7 to 305.3
7 600V 600V 60Hz 588 to 612 588 to 612
8 600V 600V 400Hz 586 to 614 583 to 617
Testing the DC microamperes Function (for 61-312 and 61-314)
To verify the accuracy of AC and DC current measurement functions, do the following:
1. Connect the calibrator to the VHz and COM inputs on the meter.
2. Turn the rotary switch to µA .
a. Press the SEL Button to select the DC function
3. Apply the inputs for steps 1 through 3 in Table 3a.
4. For each input, compare the reading on the meter display to the reading for your m
in Table 3a
eter
t 5. If the display reading falls outside of the range shown in Table 3a, the meter does no
meet specification.
Table 3a DC microamperes Test:
Step Range Source Reading
1 400µA 4.0µA 3.5 to 4.5
2 400µA 300.0µA 295.9 to 304.1
3 4000µA 3000µA 2959 to 3041
Testing the DC milliamperes Function (for 61-312 and 61-314)
1. Connect the calibrator to the VHz and COM inputs on the meter.
2. Turn the rotary switch to mA .
a. Press the SEL button to select the DC function
3. Apply the inputs for steps 1 through 2 in Table 3b.
4. For each input, compare the reading on the meter display to the reading for your m
in Table 3b
eter
t5. If the display reading falls outside of the range shown in Table 3b, the meter does no
meet specification.

Form Number TM61312-4 Rev 2 Aug 2007
Page 15
Table 3b DC mA Test:
Step Range Source Reading
1 40mA 30.00mA 29.59 to 30.41
2 400mA 300.0mA 295.9 to 304.1
Testing the DC ampere Function (for 61-312 and 61-314)
1. Connect the calibrator to the 10A and COM inputs on the meter.
2. Turn the rotary switch to A .
a. Press the SEL button to select the DC function
3. Apply the inputs for steps 1 through 2 in Table 3c.
4. For each input, compare the reading on the meter display to the reading for your m
in Table 3c
eter
t5. If the display reading falls outside of the range shown in Table 3c, the meter does no
meet specification.
Table 3c DCA Test:
Step Range Source Reading
1 4A 3.000A 2.959 to 3.041
2 10A 10.00A 9.80 to 10.20
To
Testing the AC microampere Function (for 61-312 and 61-314)
verify the accuracy of AC and DC current measurement functions, do the following:
1. 1.Connect the calibrator to the VHz and COM inputs on the meter.
2. Turn the rotary switch to µA .
a. Press the SEL button to select the AC function
3. Apply the inputs for steps 1 through 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.

Form Number TM61312-4 Rev 2 Aug 2007
Page 16
Table 4a AC microampere Test:
Step Range Source Frequency Reading
1 400µA 40µA 60Hz 29.0 to 40.9
2 400µA 40µA 400Hz 29.0 to 40.9
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
Testing the AC milliampere function: (for 61-312 and 61-314)
1. Connect the calibrator to the VHz and COM inputs on the meter.
2. Turn the rotary switch to mA .
a. Press the SEL button to select the AC function
3. Apply the inputs for steps 1 through 4 in Table 4b.
4. For each input, compare the reading on the meter display to the reading for your m
in Table 4b
eter
t5. If the display reading falls outside of the range shown in Table 4b, the meter does no
meet specification.
Table 4b AC mA Test:
Step Range Source Frequency Reading
1 40mA 30.00mA 60Hz 29.50 to 30.50
2 40mA 30.00mA 400Hz 29.50 to 30.50
3 400mA 300.0mA 60Hz 295.0 to 305.0
4 400mA 300.0mA 400Hz 295.0 to 305.0
Testing the AC A function (for 61-312 / 61-314)
1. Connect the calibrator to the VHz and COM inputs on the meter.
2. Turn the rotary switch to A .
a. Press the SEL button to select the AC function
3. Apply the inputs for steps 1 through 4 in Table 4c.
4. For each input, compare the reading on the meter display to the reading for your m
in Table 4c
eter
t5. If the display reading falls outside of the range shown in Table 4c, the meter does no
meet specification.

Form Number TM61312-4 Rev 2 Aug 2007
Page 17
Table 4c AC A Test:
Step Range Source Frequency Reading
1 4A 3.000A 60Hz 2.935 to 3.065
2 4A 3.000A 400Hz 2.935 to 3.065
3 10A 10A 60Hz 9.75 to 10.25
4 10A 10A 400Hz 9.75 to 10.25
To
Testing the Resistance Function (for 61-312 / 61-314)
verify the accuracy of the resistance function, do the following:
1. Connect the calibrator to VHz and COM on the meter.
2. Turn the rotary switch to .
3. Apply the inputs for steps 1 through 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 400Ω* 4.0Ω3.6 to 4.4
2 400Ω* 300.0Ω296.6 to 303.4
3 4kΩ3.000KΩ2.966 to 3.034
4 40kΩ30.00KΩ29.66 to 30.34
5 400kΩ300.0KΩ296.6 to 303.4
6 4MΩ3.000MΩ2.960 to 3.040
7 40MΩ30.00MΩ29.50 to 30.50
*Lead resistance on the 400Ωrange is not included in error.

Form Number TM61312-4 Rev 2 Aug 2007
Page 18
Testing the Capacitance Function (for 61-312 / 61-314)
Th
m
m
gr
e meter measures capacitance by charging the capacitor with a known direct current,
easuring the resultant voltage, and calculating the capacitance. If the same capacitance is
easured on an impedance bridge, a different reading may result. This variance is likely to be
eater at higher frequencies.
To verify the accuracy of the capacitance measuring function, do the following:
1. Apply the capacitor to the VHz and COM inputs on the meter. For steps1 through 6 i
Table 6.
n
2. Turn the rotary switch to .
3. Compare the reading on the meter display to the reading in Table 6.
Note: The meter selects the proper range automatically. Each measurement takes about
one second per range. Readings >40.00μF will take ≥5 to 10seconds
t4. If the display reading falls outside of the range shown in Table 6, the meter does not mee
specification.
Table 6 Capacitance Test:
Step Range Source Reading
1 40nF 10.000nF 9.65 to 10.35
2 40nF 30.00nF 29.05 to 30.95
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
6 100.0µF 100.0µF 96.5 to 103.5
Checking the Diode Test Function (for 61-312 / 61-314)
To check the diode test function, do the following:
1. Connect the DVM (Digital Voltage Meter) leads to the VHz and COM inputs on the
meter.
2. Turn the meter’s rotary switch to .
 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
5. Apply a 20-ohm resistor to the meter, the built-in buzzer buzzes.
.