ETCR 7300, 7300A User Manual

CONTENT

Warning ....................................................................................................1

Ⅰ.Introduction.........................................................................................2

Ⅱ. Model .................................................................................................3

Ⅲ. Electrical Symbols ............................................................................3

Ⅳ. Technical Specification ....................................................................3

Ⅴ. Measurement Accuracy ...................................................................5

1．Base Conditions and Working Conditions ..................................5

2．AC Voltage U ..............................................................................6

3．AC Current I ...............................................................................6

4．Frequency F ................................................................................6

5．Active Power P: W=( V×A×COSФ) ...........................................6

6．Apparent Power S: VA=( V×A) ..................................................7

7．Reactive Power Q: VAR=( V×A×sinФ) ......................................7

8．Power Factor PF: PF=W/ VA ......................................................7

9．Phase Angle .................................................................................7

10．Power Energy W .......................................................................8

Ⅵ. Instrument Structure ........................................................................8

Ⅶ. Method of Operation ......................................................................10

1．Switch On/Off ...........................................................................10

2．Choose measurement mode ......................................................10

3．Max and Min measurement .......................................................10

4．Backlight Control ......................................................................10

5．Data Hold/Storage .....................................................................10

6．Data Access/ Exit ...................................................................... 11

8．Delete Data ................................................................................ 11

9．Measurement Instruction ........................................................... 11

Ⅶ. Battery Replacement .....................................................................22

Ⅷ. Accessories .....................................................................................22

Warning

Thank you for purchasing our ETCR7300 Series Large Caliber Three Phase
Power Tester, in order to better use of this product, be sure to:

----To read this user manual carefully.

----Comply strictly with safety rules and precautions set out in this manual.

u Pay special attention to safety under any circumstances while using the

instrument.

u Take note of the label text and symbols on the panel and back of the

instrument.

u Keep the clamp clean and maintain regularly.
u Please don’t connect the tester with computer via RS232 during voltage

measurement.

u Please don’t place and store the instrument at the place with high

temperature, humidity, moisture condensation and straight sunlight for a
long time.

u Replace battery in time when the battery voltage is low.
u Remove or replace the battery if you expect not to use the instrument for a

long time.

u Take note of the polarity when replace the battery.
u The operation, demolition, calibration and maintenance of the instrument

must be carried out by qualified personnel authorized to do so.

u The meter should be stopped from being used immediately and sealed if

danger is brought up in case of continued use; only a competent body can
be authorized to deal with it.

u “ ” in the manual is the safety warning sign, the contents of this manual

must be followed for safe operation.

u “ ” and other safety signs, the contents of this manual must be followed

for safe operation.

-1-

Ⅰ.Introduction

ETCR7300 Series Large Caliber Three Phase Power Tester is well

designed and manufactured for measuring three phase AC voltage, current,
leakage current, phase between current and voltage, phase between phase
voltage, frequency, power energy, phase sequence, active power, reactive
power, apparent power, power. It is a multifunctional, digital, intelligent tester.
Its large caliber 80mm×80mm can clamp electric cable of 80mm diameter, or
96mm×4mm flat cable and steel earth wires. It has all the functions of Large
Caliber Leakage Clamp Meter and Micro Power Clamp Meter. Besides, it also
has this functions such as distinguish transformer wiring group, inductive and
capacitive circuits, test second circuit and bus differential protection systems,
read the phase relationship between CTs of the differential protection, check
the meter wiring right, repair lines and equipment, etc. Provide operators with
a safe, accurate and convenient tester.

ETCR7300 Series Large Caliber Three Phase Power Tester’s clamp
core is made of special alloy, adopt the latest magnetic shielding techniques,
can almost shield the influence from external magnetic field, to ensure the
high precision, high stability and high reliability of perennial uninterrupted
measurement. The meter can store 200 sets of data, with RS232 interface,
upload stored data to the computer through the system software,
implementing online real-time monitoring, historical inquires, dynamic display.
With the function of historical data read, preserve, print, and backlight, data
hold, etc. It is a necessary tool for electrical safety testing.

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Ⅱ. Model

Model Measurement Range Resolution

ETCR

7300

ETCR

7300A

Note: Other function is the same.

AC0.00mA-1200A

AC 0.5W-720KW

AC 0.0A-2000A 0.1A

AC 0.1K-1200KW

0.01mA

0.01W

1W

Can measure leakage

Can measure big current,

measure leakage current

Note

current, low power

high power. Can’t

Ⅲ. Electrical Symbols

Extremely dangerous! The operator must strictly abide by the safety
rules; otherwise there is risk of electric shock, resulting in bodily
injury or fatalities.

Dangerous! The operator must strictly abide by safety rules;

otherwise there is risk of electric shock, resulting in bodily injury or
fatalities.
Warning! Safety rules must be strictly abided by, otherwise personal
injury or equipment damage may be caused.

Alternate Current（AC）
Direct Current（DC）

Double Insulation

Ⅳ. Technical Specification

Measure three phase AC voltage, leakage current,

current, active power, reactive power, apparent

Function

Power

Test Mode Clamp CT, integral mode

Clamp Size

-3-

power, power, phase between current and voltage,
phase between phase voltage, frequency, power

energy, phase sequence
6V DC(LR6×4 alkaline dry batteries, continuously
working for 12 hours)

80mm×80mm(can clamp electric cable of 80mm
diameter, or 96mm×4mm flat cable and steel earth

wires)

*

Measured Wire

Position

Data Storage 200 sets, “FULL” symbol indicate the memory is full

RS232 Interface

Communication

Wire

Frequency

Gear Shift Automatic shift

Sample Rate About 2 times/second

Line Voltage Below AC 600V line measurement

Display Mode LCD: 128dots×64dots; Display area: 43mm×29mm

Meter Size Length 275mm × Width 145mm × Height 40mm

Backlight Controlled by “
Data Hold “HOLD” symbol appears

Overflow “OL” symbol appears

Automatic
Shutdown

Voltage

Detection

Weight 1kg(with batteries and accessories)

Working

Current

Working

Temperature

and Humidity

Storage

Temperature

and Humidity

Insulation

strength

Safety

Specifications

Measured wire at approximately the geometric center
of the clamp

With RS232 interface, download data to computer for
analysis and management

RS232 communication wire, 1.8m
50Hz ,60Hz automatic identification

”key

Automatically shutdown about 15 minutes after power
on to reduce battery consumption
Low battery symbol “ " appears to remind the
replacement of battery when the battery voltage drops
below 5.2V.

50mA with enabled backlight; 25mA with disabled
backlight

-10℃-40℃; 80%rh

-10℃-60℃; below 70%rh

AC 3700V/rms(between core and shell)
IEC1010-1, IEC1010-2-032, 2 class of pollution, CAT

Ⅲ(600V)

-4-

Ⅴ. Measurement Accuracy

1．Base Conditions and Working Conditions

Influence Quantity Model

Ambient Temp

Ambient Humidity

Signal Waveform

Signal Frequency

Current Amplitude

in Power/Power

Energy/Phase/Phase

Sequence Test

Current Amplitude

in Power/Power

Energy/Phase/Phase

Sequence Test

Voltage Amplitude in

Power/Power

Energy/Phase/Phase

Sequence Test

Current Amplitude

in Power Factor Test

Current Amplitude

in Power Factor Test
Voltage Amplitude in

Power Factor Test

External Electric

Magnetic Field

Measured Wire

Position

7300

7300A

7300

7300A

7300

7300A

7300

7300A

7300 5A±0.1A 50mA-1200A

7300A

7300

7300A

7300 5A±0.1A 50mA-1200A

7300A

7300

7300A

7300

7300A

7300

7300A

Base

Condition

23℃±1℃ -10℃-40℃ ----

40%-60% ＜80% ----

sine wave sine wave

50HZ±1HZ 45HZ-65HZ ----

50A±1A 10A-2000A ----

50V±1V 10V-600V ----

50A±1A 10A-2000A

100V±20V 10V-600V ----

To be avoided

Measured wire at approximately the

geometric center of the clamp

Working

Condition

Note

β

=0.01

----

Power
factor:

0.3-1
Power
factor:

0.3-1

-5-

2．AC Voltage U

Measurement Range

0.00V-9.99V

10.0V-99.9V 0.1V
100V-600V 1V

Accuracy Resolution

7300 7300A 7300 7300A

0.01V

±(1.5%+5dgt)

3．AC Current I

Measurement

Range

0.00mA-9.99mA ±(1.5%+5dgt)

10.0mA-99.9mA ±(1.5%+5dgt)
100mA-999mA ±(1.5%+5dgt) ±(2.0%+5dgt)

1.00A-9.99A ±(1.5%+5dgt) ±(2.0%+5dgt) 0.01A 0.1A

10.0A-99.9A ±(1.5%+5dgt) ±(2.0%+5dgt)
100A-1199A ±(2.0%+5dgt) ±(2.0%+5dgt)
1200A-2000A ---- ±(2.5%+5dgt)

Accuracy Resolution

7300 7300A 7300 7300A

---- 0.01mA

---- 0.1mA ---­1mA 0.1A

0.1A 0.1A

1A 1A

---- 1A

----

4．Frequency F

Measurement

Range

Accuracy Resolution

7300 7300A 7300 7300A

25Hz-100Hz ±(0.5%+5dgt) 0.1Hz

5．Active Power P: W=( V×A×COSФ)

Measurement

Range

0.50W-9.99W ±(3%+5dgt) ---- 0.01W ----

10.0W-99.9W ±(3%+5dgt) ---- 0.1W ----

0.10KW-9.99KW

10.0KW-99.9KW

-6-

±(3%+5dgt) ±(3%+5dgt) 0.01KW 0.01KW
±(3%+5dgt) ±(3%+5dgt) 0.1KW 0.1KW

Accuracy Resolution

7300 7300A 7300 7300A