IDEAL 61-764, 61-766, 61-768 User Manual

Page 2

#61-764
#61-766
#61-768

660A Clamp Meters
w/TightSight™ Display

Instruction Manual

Read First: Safety Information

Understand and follow operating instructions carefully. Use the meter only as specified in
this manual; otherwise, the protection provided by the meter may be impaired.

WARNING

To avoid possible electric shock, personal injury or death, follow these guidelines:

• Do not use if meter appears damaged. Visually inspect the meter to ensure case is not
cracked and back case is securely in place.

• Inspect and replace leads if insulation is damaged, metal is exposed, or probes are
cracked. Pay particular attention to the insulation surrounding the connectors.

• Do not use meter if it operates abnormally as protection maybe impaired.

• Do not use during electrical storms or in wet weather.

• Do not use around explosive gas, dust, or vapor.

• Do not apply more than the rated voltage to the meter.

• Do not use without the battery and the back case properly installed.

• Replace battery as soon as battery indicator appears to avoid false readings.

• Remove the test leads from the circuit prior to removing battery cover.

• Do not attempt to repair this unit as it has no user-serviceable parts.

CAUTION

To protect yourself, think "Safety First":

• Voltages exceeding 30VAC or 60VDC pose a shock hazard so use caution.

• Use appropriate personal protective equipment such as safety glasses, face shields,
insulating gloves, insulating boots, and/or insulating mats.

• Before each use:

- Perform a continuity test by touching the test leads together to verify the

functionality of the battery and test leads.

- Use the 3 Point Safety Method. (1) Verify meter operation by measuring a known

voltage. (2) Apply meter to circuit under test. (3) Return to the known live voltage
again to ensure proper operation.

• Use the proper terminals, functions and range for your measurements.

• Never ground yourself when taking electrical measurements.

• Connect the black common lead to ground or neutral before applying the red test lead to
potential voltage. Disconnect the red test lead from the voltage first.

• Always work with a partner.

• When using the probes, keep fingers as far behind the probe tips as possible.

600V

V

X

000V

750V

DCAC AMPS

TightSight™ Display

ND 4960-4 61-764-766-768 Ins 7/26/07 2:20 PM Page 1

CAT.IV 600V
CAT.III 1000V

61-766

MAX
MIN

INRUSH

True RMS

COM

V

Ω

V

Hz

A

CAT.IV 600V
CAT.III 1000V

1000V

660A

HOLD

66

660

OFF

V/Ω

MAX

750V

Hz

Page 4

Features

1. Tapered jaws w/hook tip

2. Lever

3. Function Dial

4. Main Display (LCD)

5. Volts and resistance (V-Ω)
input terminal

6. Common (COM) input terminal

7. TightSight™ bottom display

8. Protective rubber boot

9. Measuring Functions

10. High Voltage (Hi-V) warning

11. Data Hold

12. Max/min

13. Inrush Current

14. Backlight

15. Range ( )

Symbols on the Unit

• Warning - read the
instruction manual

• Cat IV - 600V Safety category

• Cat III - 1000V Safety category

Page 3

760 Series Common Features:

• Auto/manual ranging clamp meter • Large numbers and symbols displayed

• TightSight™ bottom display • Inrush, max/min, data hold

• Visual and

selectable

audible indication • Selectable Auto power off and low
when voltage is present even when the battery indicator
meter is set on the wrong function for • Tapered jaws for reaching into tight spaces
enhanced safety • Hook tip for easier wire separation

• Measures 660 AAC Current • Protective rubber boot

• Measures AC/DC Voltage & Resistance • Electronic overload protection on

• Audible continuity all ranges

• Bright, bold backlight • Cat IV-600V/Cat III-1000V

Model Specific Features:

• 61-764 model is averaging sensing, rms calibrated

• 61-766 model is true rms sensing, measures capacitance, frequency and lower currents
with a 66 AAC range for troubleshooting motors and adjustable speed drives

• 61-768 model is true rms sensing and measures DC current

1

10

11

3

15

4

5

9

12

13

14

6

8

7

2

Main Display Icons

16. 6600 count display

17. AC measurement

18. DC measurement

19. Polarity indicator for DC

20. Range ( )

21. Auto Power Off
(APO)

22. Data Hold

23. Max/min

24. Inrush Current

25. Audible continuity

26. Volts

27. Amps

28. Farads

29. Ohms

30. Hertz

31. Low battery indicator

TightSight™ Display Icons

32. 6600 count display

33. Polarity indicator for DC

34. DC measurement

35. AC measurement

36. Amps

DCAC AMPS

16

17

20

33

32

18

19

21

34 35 36

25

27

31

28
29

30

Main Display

TightSight™ Bottom Display

6

1

­7

6

6

COM

V/

CAT. IV 600V
CAT. III 1000V

MAX
1000V
750V

0

10

20

30

40

A

P

O

A

C

A

DCAC AMPS

66

66

0

INRUSH

Note: Only AC/DC amps units of measure are displayed in the TightSight™
display since primary use is for viewing current measurements in tight locations.
The display will show numerical values only for other functions. The main
display is to be used to view units of measure for all other functions.

24 2322 26

ND 4960-4 61-764-766-768 Ins 7/26/07 2:20 PM Page 3

CAT.IV 600V
CAT.III 1000V

660A

61-766

MAX
MIN

INRUSH

COM

V

V

Ω

Hz

66

A

True RMS

CAT.IV 600V
CAT.III 1000V

MAX

1000V

750V

660

OFF

V/Ω

HOLD

Page 6

OPERATION:

High Voltage Warning (HI-V)

The meter beeps and lights an LED when > 30V AC/DC voltage is present
through the test leads of the meter. This enhanced safety feature alerts the
user that dangerous voltage is present across the leads even if the meter is
set on an incorrect function or range.
Notes: This features does not work through the clamp head as the clamp is
intended to only measure current. Audible indication can be turned off by
sliding the switch in battery compartment.

Auto/Manual Ranging Mode ( )
The meter defaults to autoranging mode to automatically select the best range to display the
measurement. By pressing the Range ( ) button on the meter, the manual range mode will
override the auto-ranging feature of the meter. A ( ) appears in the upper left side of the
display. Continue pressing the Range button until the desired range is obtained. Use this
mode to access the mV range or to lock in a specific range for repeated measurements. To
return to the autoranging mode, either depress the Range button for greater than 1 second or
turn the meter off and then back on again.

INRUSH Feature (61-766, 61-768 models only)

The INRUSH function captures the starting current precisely in the beginning of the 100-milli
second period. Press the “INRUSH” button to toggle into the INRUSH mode, and the “----”and
“INRUSH” will be displayed. Clamp onto a single conductor and turn on the motor. Read the
INRUSH current on the display. Depress the INRUSH button for more than 2 seconds to exit the
INRUSH mode. Note: Minimum input range: >100 dgts. (66A range unspecified.)

Max/Min Feature

The Max records the maximum vaue measured over time while Min captures the minimum
value measured over time. Press the Max/Min button to activate this feature and to toggle
between Max, Min and MaxMin. “MAXMIN” displays the real time reading while still capturing
max and min values over time. Depressing the max/min button for >2 sec. exits the mode.
Note: To record max/min values over a time period >30 min, the Auto Power Off (APO) feature
must be defeated.

Data Hold Feature

Press the Hold button on the side of the meter to toggle in and out of the data hold mode.
“HOLD” appears in the upper left of the meter display when data hold is active. Use the data
hold feature to lock a measurement reading on the display. Press the Hold button again to
unlock the display and obtain a real-time reading.

ZERO Feature (61-768 model only)

The “ZERO” button is used to zero out the display before measuring DC current. Press the
“ZERO” button to subtract out the non-zero number. Then, measure the DC amps. Pressing the
“ZERO” button again causes the “ZERO” to flash and the original offset number to be displayed.
Depress the “ZERO” button for >2 sec. to exit this mode.

Page 5

CORRECT

Use with

line splitter

INCORRECT

Currents

cancel

CORRECT

Single

Conductor

only

Note: 61-768 model also measures DC Current.

66

660

INRUSH

66

INRUSH

H

N

Relative Mode (61-764 model only)

Press “ ” button to enter the Relative mode. The “ ” symbol is displayed, and the value on
the display is subtracted and stored as a reference value. In the Relative mode, the value shown
on the display is always the difference between the stored reference value and the present
reading. Press the “ ” button again to exit the Relative mode.

Selectable Auto Power Off (APO) Feature

The meter automatically powers itself down after about 30 minutes of no use. Press any
button, and the meter will wake up and display the last reading taken before power down. This
feature can be overridden by holding the Range ( ) button while turning the function switch
from Off to any other position. When APO is defeated, the “APO” will be removed from the
display. Turning the meter off will restore the APO default.

Backlight

Press the button in the middle of the meter to turn
the backlight on and off. The green backlight will remain
lit for about 3 minutes before it automatically turns off
to conserve battery power.
Note: Backlight consumes 4x the battery power.

Measuring AC Current (Amps):

66

INR

U

S

H

Backlight on in

all functions.

ND 4960-4 61-764-766-768 Ins 7/26/07 2:20 PM Page 5

Page 8

Measuring Resistance (Ohms):

• Verify the circuit is de-energized to obtain accurate measurements.

66

660

INRUSH

66

660

INRUSH

Closed
Circuit

Open

Circuit

Measuring Voltage:

Page 7

Verifying Continuity ( ):

• Verify the circuit is de-energized.

• The meter will sense the level of
resistance and beep if the resistance
is less than 40 Ω to confirm that
continuity is present.

Measuring Capacitance (61-766):

66

660

INRUSH

AC Voltage DC Voltage

66

660

INRUSH

66

660

INRUSH

Note: If “disc” is displayed, then voltage exists in capacitor. Discharge capacitor and
re-initiate test.

Note: 660.0/750VAC/1000VDC are auto ranges while 6600mV/6.600/66.00 are manual ranges.

ND 4960-4 61-764-766-768 Ins 7/26/07 2:20 PM Page 7

INRUSH

66

660

Page 10

Page 9

Battery Replacement:

• Ensure test leads are disconnected from
circuit or components.

• Remove test leads from input jacks
on meter.

• Remove the two screws from the
battery cap.

• Remove the battery cap.

• Replace battery with a new 9V battery.

• Assemble the battery cap to the
meter and re-tighten the screws.

Maintenance:

Clean the case with a damp cloth and mild detergent. Do not use abrasives or solvents.

Service and Replacement Parts:

This unit has no user-serviceable parts.

For replacement parts or to inquire about service information contact IDEAL INDUSTRIES,
INC. at 1-877-201-9005 or visit our website www.testersandmeters.com.

Specifications:

Displays: 3-3/4 digit LCD with 6600 counts for both displays
Backlight: Green illumination with auto-off after 3 minutes
Polarity: Automatic, positive implied, negative (-) polarity indication.
Overrange: "OL" indication is displayed.
Zero: Automatic
Measure Rate: Samples 2 times per second, nominal.
Auto Power Off: Approximately after 30 minutes of non-use.
Battery Life: 200 hours continuous with Alkaline (61-764, 61-766)

150 hours continuous with Alkaline (61-768)

Low Battery Indication: The " " is displayed when battery voltage drops below

operating level.

Power Supply: (1) 9V battery (NEDA 1604, JIS 006P, IEC 6F22)

Includes an isolated battery compartment.
Accuracy: Stated accuracy at 23°C ±5°C, <75% R.H.
Temperature 0.1 x (specified accuracy) per °C,
Coefficient: (0°C to 18°C, 28°C to 50°C).
Altitude: 6561.7 ft. (2000m)
Operating Environment: 32°F to 122°F (0°C to 50°C) at < 70% R.H.
Storage Environment: -4°F to 140°F (-20°C to 60°C) at < 80% R.H. without battery
Jaw Opening: Accepts a 1.42" (36mm) conductor
Dimensions: 8.7”H x 3.1”W x 1.8”D (222mmH x 80mmW x 45.5mmD)
Weight: 12.3 oz (350g) including battery
Accessories included: Carrying Case, Test Leads with alligator clip, (1) 9V

battery, operating instructions.
Safety: Complies with UL61010-1, UL61010-2-032, UL61010-2-031

EN61010-1, EN61010-2-032, EN61010-031 specifications,

Cat IV-600V/Cat III-1000V.

Double Insulation
Instrument has been evaluated and complies with insulation category IV (overvoltage
category IV). Pollution degree 2 in accordance with IEC-644. Indoor use.

Replacement boot is

available.

CUS

N12966

Measuring Frequency (61-766):

ND 4960-4 61-764-766-768 Ins 7/26/07 2:20 PM Page 9

66

660

INRUSH

Page 11

Ranges & Accuracies:
AC Converter: 61-764 model is averaging sensing, rms calibrated

61-766, 61-768 models are true rms sensing.

Accuracy: Accuracy is specified as +/-(a percentage of the reading + a fixed amount) at
23°C±5°C (73.4°F ± 9°F), less than 75% relative humidity.
Temperature Coefficient: 0.1 times the applicable accuracy specification per degree C
from 0°C to 18°C and 28°C to 50°C (32°F to 64°F and 82°F to 122°F)

Dispose of waste electrical and electronic equipment

In order to preserve, protect and improve the quality of environment, protect human health
and utilize natural resources prudently and rationally, the user should return unserviceable
product to relevant facilities in accordance with statutory regulations. The crossed-out

wheeled bin indicates the product needs to be disposed separately and not as municipal waste.

Disposal of used batteries/accumulators!

The user is legally obliged to return used batteries and accumulators. Disposing used batter­ies in the household waste is prohibited! Batteries/accumulators containing hazardous sub­stances are marked with the crossed-out wheeled bin. The symbol indicates that the product
is forbidden to be disposed via the domestic refuse. The chemical symbols for the respective
hazardous substances are Cd = Cadmium, Hg = Mercury, Pb = Lead.

You can return used batteries/accumulators free of charge to any collecting point of your
local authority, our stores, or where batteries/accumulators are sold. Consequently you comply with
your legal obligations and contribute to environmental protection.

Warranty Statement:

This tester is warranted to the original purchaser against defects in material and
workmanship for two years from the date of purchase. During this warranty period, IDEAL
INDUSTRIES, INC. will, at its option, replace or repair the defective unit, subject to
verification of the defect or malfunction. This warranty does not apply to defects resulting
from abuse, neglect, accident, unauthorized repair, alteration, or unreasonable use of the
instrument.

Any implied warranties arising out of the sale of an IDEAL product, including but not limited
to implied warranties of merchantability and fitness for a particular purpose, are limited to
the above. The manufacturer shall not be liable for loss of use of the instrument or other
incidental or consequential damages, expenses, or economic loss, or for any claim or
claims for such damage, expenses or economic loss.

State laws vary, so the above limitations or exclusions may not apply to you. This warranty
gives you specific legal rights, and you may also have other rights which vary from state to
state.

Warranty does not cover batteries.

*Accuracy stated for crest factor ≤ 3 at full scale and ≤ 6 at half scale.
**Measuring time: < 3s on 6.6µ - 66µF ranges ; < 6s on 660µF range
***Frequency can be measured through clamp head.
Input impedance: 1M.Ω

Accuracy

Function

Range and Overload

Resolution

61-764 61-766 61-768

Protection

66.00A

(50-60Hz) 1.7% + 8 1.7% + 10 N/A

66.00A (60-400Hz) 3.0% + 8 3.0% + 10 N/A

AC Current*

660.0A (50-60Hz) 1.7% + 8 1.7% + 10 2.0% +10

660 AAC

660.0A (60-400Hz) 3.0% + 8 3.0% + 10 3.0% +10

DC Current 660.0A N/A N/A 2.0% + 5 660 ADC

660.0m

(50-60Hz)

1.7% + 8
1000VDC or

AC Voltage* 6.600/66.00/660.0V

750V (50-400Hz) 1.5% + 8

750VAC rms

660.0mV 1.0% + 2

DC Voltage

6.600/66.00/660.0/1000V 0.5% + 2

1000VDC or 750 VAC rms

660.0/6.600k/66.00k/400.0kΩ 1.0% + 4

Resistance 4.000MΩ 5.0% + 4 600 VDC or AC rms

10.00MΩ 12.0% + 5

Capacitance** 6.600µ/66.00µ/660.0µ F N/A 3.0% + 10 N/A 600 VDC or AC rms

20 - 400 Hz

660 AAC

Frequency*** Sensitivity is 20-100Hz (≥ 5A) N/A 0.1% + 3 N/A

100-400 Hz (≥ 10A)

600 VDC or AC rms

Audible indication < 40Ω •••

Continuity

Response time: 100ms • • •

600 VDC or AC rms

IDEAL INDUSTRIES, INC.

Sycamore, IL 60178
Technical Hotline: [phone]
www.testersandmeters.com
ND 4960-4 Made in Taiwan

1.2% + 8 (50~100Hz)

1.5% + 8 (100~400Hz)

ND 4960-4 61-764-766-768 Ins 7/26/07 2:20 PM Page 11