Major tech MT785 1000 A User manual

Brand: Major tech

Model: MT785 1000 A

Category: Multimeters

Type: User manual

MT785

1000 A AC/DC TRMS

POWER CLAMP METER

Contents Page no

1. Safety

1.1. International Safety Symbols

This symbol adjacent to another symbol, terminal or

operating device indicates that the operator must

refer to an explanation in the Operating Instructions

to avoid personal injury or damage to the meter.

This symbol adjacent to one or more terminals

identiﬁes them as being associated with ranges that

may, in normal use, be subjected to particularly

hazardous voltages. For maximum safety, the meter

and its test leads should not be handled when these

terminals are energized.

Equipment is protected by double or reinforced

insulation

1.2. Safety Notes

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

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

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

Ÿ Remove the battery if meter is to be stored for longer than 60 days.

1.3. Warnings

Ÿ Set function switch to the appropriate position before measuring.

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

Ÿ Do not measure current on a circuit whose voltage exceeds 600V.

Ÿ When changing ranges always disconnect the test leads from the

circuit under test.

1.4. Cautions

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

Read and understand this user manual before operating the meter.

Ÿ Always remove the test leads before replacing the battery or fuses.

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

damage before operating the meter. Repair or replace any damage

before use.

Ÿ Use great care when making measurements if the voltages are

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

shock hazard.

Ÿ Always discharge capacitors and remove power from the device under

test before performing Diode, Resistance or Continuity tests.

Cautions cont.

Ÿ 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".

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

the protection provided by the equipment may be impaired.

A AC, A DC 1000A AC

Maximum

Input

Function

1000V DC/AC

600V DC/AC

600V DC/ AC

V DC, V AC

Resistance, Capacitance, Frequency,

Diode Test

Temperature

2. Description

2.1. Meter Description

1. Current clamp

2. Flash light LED

3. Non-contact AC voltage

indicator light

4. Flash light button

5. Clamp trigger

6. Rotary Function switch

7. Data Hold and Backlight button

8. MODE select button

9. PEAK and INRUSH button

10. Max/Min button

11. RANGING button

12. LCD display

13. COM input jack

14. V ΩCAP TEMP Hz jack

15. Battery Cover

_______

__________2

_____

________

_________

__________

___________15

_________14

_______9

__________11

________6

______4

__________3

2.2 Display icons Description

HOLD Data Hold

- Negative Reading Display

0 to 3999 Measurement display digits

MAX/MIN Maximum/Minimum

REL/DCA Zero

Auto Power Off

AUTO Auto Range Mode

DC/AC Direct Current / Alternating

Current

Low Battery

mV or V Milli-volts or Volts (Voltage)

Ohms (Resistance)

A Amperes (Current)

F Farad (Capacitance)

Hz/% Hertz (Frequency)/

Percent (duty ratio)

C° and F° Celsius and Fahrenheit units

(Temperature)

n, m, μ, M, k Unit of measure prefixes: nano, milli, micro

Continuity Test

Diode Test

THD THD Test

Individual Harmonic mode

Select Mode

3. SPECIFICATIONS

Voltage

Function Range Resolution Accuracy

(% of reading + digits)

DC Voltage

6.000V

60.00V

600.0V

1000V

1mV

10mV

100mV

+1.0% of rdg + 3digits

+1.2% of rdg + 3digits

+1.5% of rdg + 3digits

Function Range Resolution Accuracy

(% of reading + digits)

AC True RMS Voltage

6.000V

60.00V

600.0V

1000V

1mV

10mV

100mV

+1.2% of rdg + 5digits

+1.5% of rdg + 5digits

+3% of rdg + 8digits

Maximum Input: 1000V DC

AC Response: 50 Hz to 400Hz

Not sinusoidal waveform Accuracy:(60Hz to 400Hz) : (10%rdg + 10dgt)

Maximum Input: 1000V ac rms.

Function Range Resolution Accuracy

(% of reading + digits)

AC +DC

6.000V

60.00V

600.0V

1000V

1mV

10mV

100mV

+1.5% of rdg + 5digits

+3% of rdg + 8digits

Function Range Resolution Accuracy

(% of reading + digits)

DC A

60A

1000A

60A

1000A

10mA

100mA

10mA

100mA

±(2.5% of reading + 0.2A)

±(2.5% of reading + 5digits)

50-60Hz ±(2.5% of reading + 8digits)

AC A

Current

Function Range Resolution Accuracy

Frequency 20Hz-10kHz 0.1Hz ±(0.5% of reading + 3digits)

Frequency

Function Range Resolution Accuracy

AC A/AC V 99.9% 0.1% ±(3% of reading + 10digits)

Total Harmonic Distortion

Harmonic distortion measurement

Function Range Resolution Accuracy

H01-H12 99.9% 0.1% ±(5% of reading + 10digits)

±(10% of reading + 10digits)

Active Power

Function Range Accuracy

AC W 599.9KW

ACA Sensitivity: >10A RMS

DCV Sensitivity : >5V MAX 600V

A.error x v.reading+

V.error x A.reading

H13-H25

Power Factor

Function Range Accuracy

PF -1.0-0.0-1.0 ±(3% of reading + 1digits)

Function Range Resolution Accuracy

Resistance

Resistance & Continuity & Diode

600.0Ω

6.000kΩ

60.00kΩ

600.0kΩ

6.000MΩ

60.00MΩ

0.1Ω

1Ω

10Ω

100Ω

1kΩ

10kΩ

±(1.0% of reading + 5digits)

±(1.5% of reading + 3digits)

±(2.0% of reading + 5digits)

±(3% of reading + 8digits)

Function Range Resolution Accuracy

Capacitance

9.999uF

99.99uF

999.9uF

9999uF

1nF

10nF

0.1uF

1uF

±(3% of reading + 5digits)

±(4% of reading + 10digits)

±(4.5% of reading + 10digits)

Function Range Resolution Accuracy

Temperature

-50°C ----

+599.9°C

600°C ----

+1000°C

-58°F ----

+599.9°F

600°F ----

+1832°F

0.1°C

1°C

0.1°F

1°F

±(3% of reading + 5°C)

±(3% of reading + 9°F)

Function Testing Condition Reading

Diode

Diode and Continuity

Forward DCA is approx.1mA,

open circuit Voltage MAX . 3V

Test current MAX. 1.5mA

Forward voltage drop of Diode

Buzzer makes a long sound,

While resistance is less than(50)

Continuity

4. General Speciﬁcations

Clamp jaw opening 1.9" (48mm) approx.

Flexible coil φ140*180mm

Display 3-6/7 digits (6000 counts) backlit LCD

Threshold 50Ω; Test current <0.5mA

Continuity check

Low Battery indication is displayed

Over-range indication 'OL' display

Measurement rate 3 readings per second, nominal

PEAK Captures peaks >1ms

INRUSH 100MS

Temperature sensor Type K thermocouple

Input Impedance 10MΩ (VDC and VAC)

AC response True RMS (A AC and V AC)

Operating Temperature 5°C to 40°C (41°F to 104°F)

Storage Temperature -20°C to 60°C (-4°F to 140°F)

Operating Humidity Max 80% up to 31°C (87°F) decreasing

linearly to 50% at 40°C (104°F)

Storage Humidity <80%

Operating Altitude 2000meters (7000ft.) maximum.

Battery One (1) 9V Battery

Auto power OFF After approx. 30 minutes

Dimensions & Weight 230 x 76 x 40mm; 315g

Safety 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

5. OPERATION

Notes

Read and understand all WARNING and CAUTION statements in this

operation manual prior to using this meter. Set the function select switch

to the OFF position when the meter is not in use.

5.1. AC/DC 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, 600A or 60A range. If the

approx. range of the measurement is not known, select the highest

range then move to the lower ranges if necessary.

2. Press the ZERO button to zero the meter display.

3. Use the MODE button to select AC or DC Current.

4. Press the trigger to open jaw. Fully enclose only one conductor. For

optimum results, center the conductor in the jaw.

5. The clamp meter LCD will display the reading.

NOTE: Press ZERO button to test DC Current Measurements .

5.2. AC Voltage Measurement

1. Insert the black test lead into the negative COM terminal and the

red test lead into the positive V CAP TEMP Hz Ω terminal. G

2. Set the function switch to the V~ position.

3. Connect the test leads in parallel to the circuit under test.

4. Read the voltage measurement on the LCD display.

5.3. DC Voltage Measurement

1. Insert the black test lead into the negative COM terminal and the

red test lead into the positive V CAP TEMP Hz Ω terminal.G

2. Set the function switch to the V- position.

3. Connect the test leads in parallel to the circuit under test.

4. Read the voltage measurement on the LCD display.

5.4. Resistance

1. Insert the black test lead into the negative COM terminal and the

red test lead into the V CAP TEMP Hz Ω positive terminal. G

))

2. Set the function switch to the Ω ).CAP position.

3. Touch the test probe tips across the circuit or component under

test.

4. Read the resistance on the LCD display.

5.5. Capacitance Measurements

))

1. Set the function switch to the Ω ).CAP position.

2. Insert the black test lead banana plug into the negative COM jack

and the red test lead banana plug into the V CAP TEMP Hz Ω· G

positive jack.

3. Touch the test probe tips across the part under test. If “OL” appears

in the display, remove and discharge the component.

4. Read the capacitance value in the display.

5. The display will indicate the proper decimal point and value.

Note: For very large values of capacitance measurement it can take

several minutes before the final reading stabilizes.

WARNING: To avoid electric shock, discharge the capacitor under test

before measuring.

5.6. Frequency Measurements

1. Insert the black test lead banana plug into the negative COM jack

and the red test lead banana plug into the V CAP TEMP Hz Ω G

positive jack.

2. Set the function switch to the AC V/AC A Position.

3. Touch the test probe tips across the part under test.

4. Read the value on the display.

5. The display will indicate the proper decimal point and value.

1. Insert the black test lead into the negative COM terminal and the

red test lead into the V CAP TEMP Hz Ω positive terminal. G

2. Set the function switch to the Ω CAP position.

))

G ).

3. Use the MODE button to select continuity “ “ The display icons

will change when the MODE button is pressed.

4. Touch the test probe tips across the circuit or component under

test.

5. If the resistance is < 50Ω, a tone will sound.

5.7. Temperature Measurements

1. Set the function switch to the TEMP position.

2. Insert the Temperature Probe into the negative COM and the

V CAP TEMP Hz Ω positive jacks, observing polarity. G

3. Touch the Temperature Probe head to the device under test.

Continue to touch the part under test with the probe until the

reading stabilizes.

4. Read the temperature on the display. The digital reading will

indicate the proper decimal point and value.

5. Use the MODE button to select °C or °F.

WARNING: To avoid electric shock, be sure the thermocouple

probe has been removed before changing to another measurement

function.

5.8. Continuity Measurements

5.9. Diode Test

1. Insert the black test lead banana plug into the negative COM jack

and the red test lead banana plug into the V CAP TEMP Hz Ω G

positive jack

2. Turn the function switch to Ω CAP. Use the MODE

))

G ).

button to select the diode function if necessary (diode symbol will

appear on the LCD when in Diode test mode)

3. Touch the test probe tips to the diode or semiconductor junction

under test. Note the meter reading

4. Reverse the test lead polarity by reversing the red and black leads.

Note this reading

5. The diode or junction can be evaluated as follows:

• If one reading displays a value (typically 0.400V to 0.900V) and

the other reading displays OL, the diode is good.

• If both readings display OL the device is open.

• If both readings are very small or '0', the device is shorted.

5.10. THD Measurement (AC mode only)

Select the “THD” indicator then press the MODE key to enter the THD

mode. THD-F=RMS of Harmonics ÷ RMS of fundamental ×100%.

(harmonics up to the 50th)

5.11. Individual Harmonic Measurement (AC mode only)

Select the “ “ indicator then press the mode key to enter the

individual harmonic mode. Select the “Hn “ indicator then press the

and key to enter the individual harmonic mode. Hn=RMS of

Individual Harmonic ÷ RMS of fundamental ×100%.

5.12. Measuring Active Power (W) / Power factor (PF)

Step 1: Set the rotary switch to the “W” position.

Step 2: Connect the Red test lead to the Line conductor, and the Black

test lead to the Neutral conductor.

Step 3: Press the trigger to open the transformer jaws and clamp one

conductor only, make sure that the jaw is firmly closed around

the conductor.

Step 4: Using the Mode key to choose the “W/PF” mode.

Note: The meter offer AC power measurement mode only.

1. Single Phase Power Measurement

Active power sign :

No sign : Indicates the power flows from the power source to the

load.

“_” sign : Indicates the power flows from the load to the power

source.

Power factor sign :

No sign : The phase of the current signal is lagging behind the

voltage signal (inductive load).

“_” sign : The phase of the current signal is leading the voltage

signal (capacitive load).

Overrange display :

± OL kW : Active Power >600 kW or < -600 kW.

OLU: Active Power >600 V or < -600 V.

The AUTORANGE mode automatically selects the proper range for the

measurement being made and is generally the best mode for most

applications. For measurement situations requiring that a range be manually

selected, perform the following:

1. Momentarily press the RANGE button. The “AUTO” indicator will

no longer be shown on the LCD display.

2. Momentarily press the RANGE button to step through the available

ranges until the desired range is selected.

3. To exit the Manual Ranging mode, press and hold the RANGE

button until the “AUTO” indicator reappears.

The Autorange mode automatically selects the proper range for the

measurement being made and is generally the best mode for most

applications. For measurement situations requiring that a range be manually

selected, perform the following:

1. Momentarily press the RANGE button. The “AUTO” indicator will

no longer be shown on the LCD display.

2. Momentarily press the RANGE button to step through the available

ranges until the desired range is selected.

3. To exit the Manual Ranging mode, press and hold the RANGE

button until the “AUTO” indicator reappears.

5.13. RANGE button

Press MODE key the selection of double measured functions which are

present at display is possible. In particular this key is active in V CAP Ω G

position to select among resistance test, diode test, continuity test and

capacitance test, and in Temp position to select between °C or °F. and in

current position to select between AC or DC current measurements and

THD test.

To press and hold the MODE key to turn the system on, the auto power off

function will be cancelled.

NOTE: Only ACV functions can do the peak value measurement.

PEAK Key is the peak value measurement key that acts with trigger.

6. Mode

NOTE: Only AC A functions can do the INRUSH value measurement.

1. Switch off motor and then clamp supply.

2. Press the INRUSH button , “----”will appear in the display.

3. Start motor and then read the value on the display.

INRUSH

To freeze the LCD reading, press the HOLD button. While data hold is active,

the HOLD icon appears on the LCD. Press the HOLD button again to return

to normal operation.

Data Hold

Press MAX/IN key the maximum and minimum values are measured.

This mode is activated on each measurement except for continuity test,

diode test capacitance test, frequency test and duty cycle test.

This mode is disabled keeping pressed MAX/MIN key or moving the

rotary switch.

MAX/MIN

Press the Flash light button to turn the flash light on. Press again to turn

the flash light off.

Flash Light Button

The LCD is equipped with backlighting for easier viewing, especially in

dimly lit areas. Press the backlight button to turn the backlight on. Press

again to turn the backlight off. Note that the meter does have an auto

power off feature as described below.

LCD Backlight Button

In order to conserve battery life, the meter will automatically turn off

after approximately 15 minutes. To turn the meter on again, turn the

function switch to the OFF position and then to the desired function

position.

Automatic Power OFF

Bluetooth Off: Bluetooth logo is not displayed on the screen

Bluetooth On: Bluetooth logo is displayed on screen

Hold down the mode button to select the bluetooth function

Bluetooth

WARNING: To avoid electrical shock, disconnect the meter from any circuit,

remove the test leads from the input terminals, and turn OFF the meter

before opening the case. Do not operate the meter with an open case.

7. MAINTENANCE

Cleaning and Storage

Periodically wipe the case with a damp cloth and mild detergent; do

not use abrasives or solvents. If the meter is not to be used for 60

days or more, remove the battery and store it separately.

Battery Replacement

1. Remove the Phillips head screw that secures the rear battery door

2. Open the battery compartment

3. Replace the 9V battery

4. Secure the battery compartment

Temperature Probe Replacement

NOTE: To use a K Type thermocouple probe that is terminated by a

subminiature (flat blade) connector, a subminiature-to-banana plug

adaptor (Part Number MT660 & MT802) is required.

www.major-tech.com www.majortech.com.au

[email protected] [email protected]

MAJOR TECH (PTY) LTD

South Africa Australia

Major tech MT785 1000 A User manual

Brand: Major tech

Model: MT785 1000 A

Category: Multimeters

Type: User manual

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Major tech MT785 1000 A User manual

Major tech MT785 1000 A User manual

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