Major tech MT 770 Bedienungsanleitung

MT770

AC TRMS

CLAMP METER

INSTRUCTION MANUAL

Contents Page no

1. Safety ..................................................................................... 4

2. Description ............................................................................ 5

2.1. Meter Description .............................................................. 5

2.2. Symbols Used on LCD Display ...........................................6

3. Specifications ........................................................................ 7

3.1. Specifications ................................................................... 7

3.2. General Specifications ...................................................... 9

4. Operation ............................................................................. 10

4.1. AC Current Measurement ................................................ 10

4.2. AC/DC Voltage Measurement ......................................... 11

4.3. Resistance Measurement ............................................... 11

4.4. Diode and Continuity Measurements............................... 11

4.5 .Capacitance Measurements ........................................... 12

4.6. Frequency or % Duty Cycle Measurements .................... 12

4.7. Temperature Measurements ........................................... 12

4.8. Non-Contact AC Voltage Measurements ......................... 13

5. Button ................................................................................... 13

5.1. MODE/INRUSH Button ................................................... 13

5.2. RANGE Button ................................................................ 13

5.3. PEAK/VFD Button ........................................................... 13

5.4. REL/Backlight Button....................................................... 14

5.5. Data Hold/Flashlight Button ............................................. 14

6. Battery Replacement ........................................................... 14

7. Maintenance ........................................................................ 14

8. Cleaning and Storage .......................................................... 14

9. Battery Replacement .......................................................... 14

10. Temperature Probe Replacement ..................................... 14

This symbol, adjacent to another symbol or terminal, indicates

the user must refer to the manual for further information.

This symbol, adjacent to a terminal, indicates that, under

normal use, hazardous voltages may be present.

Double insulation.

1. Safety

1.1. lnternational Safety Symbols

1.2. SAFETY NOTES

• Do not exceed the maximum allowable input range of any function.

• Do not apply voltage to meter when resistance function is selected.

• Set the function switch OFF when the meter is not in use.

1.3. WARNINGS

• Set function switch to the appropriate position before measuring.

• When measuring volts do not switch to current/resistance modes.

• When changing ranges using the selector switch always disconnect the

test leads from the circuit under test.

• Do not exceed the maximum rated input limits.

1.4. CAUTIONS

• Improper use of this meter can cause damage, shock, injury or death.

Read and understand this user manual before operating the meter.

• Always remove the test leads before replacing the battery.

• Inspect the condition of the test leads and the meter itself for any

damage before operating the meter. Repair or replace if damaged before

use.

• Use great care when making measurements if the voltages are greater

than 25VAC RMS or 35VDC. These voltages are considered a shock

hazard.

• Remove the battery if the meter is to be stored for long periods.

• Always discharge capacitors and remove power from the device under

test before performing Diode, Resistance or Continuity tests.

• Voltage checks on electrical outlets can be difficult and misleading

because of the uncertainty of connection to the recessed electrical

contacts. Other means should be used to ensure that the terminals are

not “live”.

• If the equipment is used in a manner not specified by the manufacturer,

the protection provided by the equipment may be impaired.

2. Input Limits

WARNING

TO AVOID ELECTRICAL

SHOCK REMOVE TEST

LEADS BEFORE OPENING

CASE OR BATTERY COVER.

DO NOT OPERATE WITH

BATTERY COVER OPEN.

1.5V AAAX3

13 14

Hz%

Temp

°C°F

CAP

OFF

LoZ V

Hz%

600A 1000A

AC TRMS CLAMP METER

AUTO POWER OFF

CAT III 1000V

CAT IV 600V

CAP

V Hz%

Temp

COM

REL

MODE RANGE PEAK

INRUSH

2.1. Meter Description

1. Current Clamp

2. Non-Contact AC Voltage Indicator

Light

3. Clamp Trigger

4. Relative / Backlight Button

5. LCD Display

6. MODE / INRUSH Select Button

2. Description

7. RANGE Button

8. PEAK / VFD Button

9. Rotary Function Switch

10. Data Hold / Flashlight Button

11. Battery Cover

12. Flashlight

13. COM Input Jack

14. VΩHz% CAP TEMP Jack

A AC

V AC/DC

Frequency, Resistance,

Diode, Continuity,

Capacitance Test

Temperature

1000A

1000V DC/AC

1000V DC/ AC

Function Maximum Input

7 8 910 11 12 13 14

1. Low Impedance Input Mode

2. DC (Direct Current)

3. Minus Sign

4. AC (Alternating Current)

5. Low Battery

6. Inrush Current Mode

7. Auto Power Off

8. Auto Range Mode

9. Diode Test Mode

10. Audible Continuity

11. Peak Voltage Value

12. Relative Mode

13. Data Hold Mode

14. Variable Frequency Drive Voltage Value

15. Units of Measure List

16. Frequency/Duty Cycle Test Mode

17. 6000 Count Measurement Reading

2.2. Symbols Used on LCD Display

3. Specifications

3.1. Specifications

Range & Resolution

600.0A

1000A

Accuracy ±(% of reading+digits)

±(2.5% + 8 digits)

±(2.8% + 8 digits)

Function

AC Current

(50/60Hz)

Over range protection: Maximum input 1000A.

Accuracy specified from 5% to 100% of the measuring range.

Frequency Response: 50Hz to 60Hz True RMS.

Inrush current Maximum Input: 1000A.

6.000V

60.00V

600.0V

1000V

±(1.5% + 5 digits)

AC Voltage

(50-400Hz)

Variable frequency Drive TEST AC voltage range: 100V - 600V.

AC voltage bandwidth: 50 to 400Hz (Sine); 50/60 (All wave).

Accuracy specified from 5% to 100% of the measuring range.

Maximum Input: 1000V AC RMS.

VFD, PEAK Maximum Input: 1000V.

Range & Resolution

Accuracy ±(% of reading+digits)

Function

6.000V

60.00V

300.0V

±(3.0% + 40 digits)

LoZ AC

Voltage

Maximum Input: 300V AC

Range & Resolution

Accuracy ±(% of reading+digits)

Function

600.0mV

6.000V

60.00V

600.0V

1000V

±(0.5% + 5 digits)

±(1.5% + 2 digits)

DC Voltage

Maximum Input: 1000V DC

Range & Resolution

Accuracy ±(% of reading+digits)

Function

60.00nF

600.0nF

6.000µF

60.00µF

600.0µF

6.000mF

60.00mF

100.0mF

±(4.0% + 20 digits)

±(3% + 5 digits)

±(5% + 5 digits)

±(5% + 8 digits)

±(5% + 15 digits)

Capacitance

Input Protection: 300V DC or 300V AC RMS.

Range & Resolution

Accuracy ±(% of reading+digits)

Function

600.0Ω

6.000KΩ

60.00KΩ

600.0KΩ

6.000MΩ

60.00MΩ

±(1.0% + 4 digits)

±(1.5% + 2 digits)

±(2.5% + 3 digits)

±(3.5% + 5 digits)

Resistance

Input Protection: 300V DC or 300V AC RMS.

Range & Resolution

Accuracy ±(% of reading+digits)

Function

Note: Accuracy is given as ±(% of reading + counts of least significant digit) at 23°C ±5°C,

with relative humidity less than 80%RH. AC voltage and current shall be subject to sine

wave.

9.999Hz to 99.99kHz ±(1.2% + 5 digits)

Frequency

Sensitivity:

=>5VRMS

Range & Resolution

Accuracy ±(% of reading+digits)

Function

10.0% to 90.0% ±(1.2% + 2 digits)

Duty Cycle

Sensitivity:

=>5VRMS

Input Protection: 300V DC or 300V AC RMS.

Range & Resolution

Accuracy ±(% of reading+digits)

Function

-20.0 to 1000°C

-4.0 to 1832°F

±(3% + 5°C)

±(3% + 9°F)

Temp

(Type-K)

(Probe accuracy not included)

Input Protection: 300V DC or 300V AC RMS.

Range & Resolution

Accuracy ±(% of reading+digits)

Function

Clamp Size

TRMS

Diode Test

Continuity Check

Low Battery Indication

Overrange Indication

Measurements Rate

Input Impedance

Display

AC Current

AC Voltage Bandwidth

Operating Temperature

Storage Temperature

Operating Humidity

Storage Humidity

Operating Altitude

Over Voltage

Battery

Auto Off

Dimensions

Weight

Safety

33mm approx

The AC voltage and AC current of this

instrument are measured by TRMS. True RMS

measurement is different from mean

measurement. The mean measurement

method can only measure the symmetric

waveform, such as sine wave. True RMS

measurements can reliably measure any

irregular waveform and obtain valid values for

AC voltage or AC current.

Test current of 0.3mA typical; Open circuit

voltage 3.2V DC typical.

Threshold <=50Ω; Test current < 0.5mA

“ ” is displayed

“OL” is displayed

2 per second, nominal

10M (VDC and VAC)

6000 counts LCD

50 - 60Hz (AAC)

50 - 400Hz (VAC)

5 to 40°C (41 to 104°F)

-20 to 60°C (-4 to 140°F)

Max 80% up to 31°C decreasing linearly to

50% at 40°C

<80%

2000 meters maximum.

Category III 1000V

Three (3) x 1.5V AAA Battery

Approx. 30 minutes

250 x 70 x 40mm

350g

For indoor use and in accordance with the

requirements for double insulation to

IEC1010-1 (2001): EN61010-1 (2001)

Overvoltage Category III 1000V and Category

IV 600V, Pollution Degree 2.

3.2. General Specifications

4. Operation

NOTICES: Read and understand all warning and precaution statements

listed in the safety section of this operation manual prior to using this

meter. Set the function select switch to the OFF position when the meter is

not in use.

4.1. AC Current Measurements

WARNING: Ensure that the test leads are disconnected from the meter

before making current clamp measurements.

1. Set the Function switch to the 1000A AC, 600A AC range.

2. If the range to be measured is not known, select the higher range first

then move to the lower range if necessary.

3. Press the trigger to open jaw. Fully enclose one conductor to be

measured.

4. The clamp meter LCD will display the reading.

CORRECTINCORRECT

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