Major tech MT740 User manual
MT740
Flexible TRMS Clamp Adaptor
INSTRUCTION MANUAL
1. Safety Information
International Safety Symbols
2. Description
1. Flexible current coil
2. Range switch
3. Power switch
4. Analog voltage output cable
5. Power indication
6. Turn knob
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
ŸDo not exceed the maximum allowable input range of any function
ŸDo not use when instrument power is off.
ŸRemove the battery if meter is to be stored for longer than 60 days.
Caution
ŸImproper use of this meter can cause damage, shock, injury or death. Read and understand this
user manual before operating the meter.
ŸInspect the condition of the test coil and the meter itself for any damage before operating the
meter. Repair or replace any damage before use.
ŸUse great care when making measurements if the voltages are greater than 25VAC RMS or
35VDC. These voltages are considered a shock hazard.
ŸIf the equipment is used in a manner not specified by the manufacturer, the protection provided
by the equipment may be impaired.
ŸDo not operate meter while Low Battery warning is on. Replace batteries immediately.
1
2
3
4
5
6
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.
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.
POWER ON
LOW POWER
100mV/A
30A
1mV/A
3000A
10mV/A
300A
VAC
1.0000
VAC
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.
A
B
C
Flexible coil
radius (mm)
Error
Distance from
Optimum(mm)
1.0%
1.5%
2.0%
A
B
C
35
50
60
AC Current
50~400Hz
True RMS
Function
30A AC
300A AC
3000A AC
Range
≤30.00A
30.0A-300.0A
300A-3000A
Best Measurement
Range
100mV/A
10mV/A
1mV/A
Output
Voltage
± (3.0% + 5mV)
± (3.0% + 3mV)
± (3.0% + 3mV)
Accuracy
6. Technical Specifications
Note:
ŸAccuracy is given as ±(% of reading + counts of least significant digit) at 23°C±5°C, with relative
humidity less than 80%RH.
ŸOutput Noise: <5.5mV for each range.
ŸMax. output voltage: 5.8V.
ŸAll 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.
180mm x 106mm x 28mm
Dimensions
210g
Weight
CAT III 1000V and CAT IV 600V, Pollution Degree 2.
Over Voltage
Batteries or 6V Exterior DC.
Power supply
EN61010-1, EN61010-2-032, EN61326-1.
Safety Standard
2 x AAA
Batteries
2000m (7000ft.) maximum.
Operating Altitude
<80%
Storage Humidity
Max 80% up to 31 (87 F) decreasing linearly to 50% at 40 (104 F)°C ° °C °Operating Humidity
-20 to 60 (-4 to 140 )°C °C °C °C
Storage Temperature
Operating Temperature 5 to 40 (41 F to 104 F )°C °C ° °
Red LED lightLow Battery indication
Green LED lightPower indication
7. General Specifications
Function Range
www.major-tech.com www.majortech.com.au
MAJOR TECH (PTY) LTD
South Africa Australia
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