Major tech MT740 Manual de instruções - Página 2

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1. Safety Information

International Safety Symbols

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

Safety Notes

Do not exceed the maximum allowable input range of any function

Do not use when instrument power is off.

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

Caution

Improper use of this meter can cause damage, shock, injury or death. Read and understand this

user manual before operating the meter.

Inspect the condition of the test coil and the meter itself for any damage before operating the

meter. Repair or replace any damage 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.

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

by the equipment may be impaired.

Do not operate meter while Low Battery warning is on. Replace batteries immediately.

2. Description

1. Flexible current coil

2. Range switch

3. Power switch

4. Analog voltage output cable

5. Power indication

6. Turn knob

3. Operation

AC Current Measurements

According to the power switch, turn on the instrument power

supply, insert the output line of the meter into the input end

of the high precision digital universal meter with AC voltage

measurement function. Pre estimate the size of the current, to

obtain the best output signal, to choose a good measurement

of gear. Single phase and then measured the ring into the

ﬂexible coil, placed in the central position, and completely

closed. This can be converted to obtain the magnitude of the

current value.

4. Position Error of Clamp

Accuracy and position error assumes centralized primary conductor

at optimum position ,no external electrical or magnetic ﬁeld, and

within operating temperature range.

Distance from

Optimum(mm)

5. 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. When the battery capacity is more than 2.5V, the power indicator light is green. When the battery

capacity is about less than 2.5V, the power indicator is red. Need to replace the battery in time.

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

3. Open the battery compartment.

4. Replace two AAA batteries.

5. Secure the battery compartment.

6. Technical Speciﬁcations

Function

AC Current

50~400Hz

True RMS

Note:

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

humidity less than 80%RH.

Output Noise: <5.5mV for each range.

Max. output voltage: 5.8V.

All scale, if the output voltage is greater than 3V, the results indicate that the measurement has

been out of range, not to be used as indicator assessment.

Flexible coil

Error

radius (mm)

1.0%

1.5%

2.0%

Range

Best Measurement

Output

Range

Voltage

30A AC

≤30.00A

100mV/A

300A AC

30.0A-300.0A

10mV/A

3000A AC

300A-3000A

1mV/A

VAC

3000A

1mV/A

10mV/A

300A

30A

100mV/A

1.0000

POWER ON

LOW POWER

VAC

Accuracy

± (3.0% + 5mV)

± (3.0% + 3mV)