HVTest SMG2000B User manual

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Dear Client
Thank you for Purchasing our SMG2000B Double Clamps
Digital Phase Meter. Please read the manual in detail prior to first
use, which will help you use the equipment skillfully.
Our aim is to improve and perfect the
company's products continually, so there may be
slight differences between your purchase equipment
and its instruction manual. You can find the changes
in the appendix. Sorry for the inconvenience. If you have further
questions, welcome to contact with our service department.
The input/output terminals and the test column
may bring voltage, when you plug/draw the test wire or
power outlet, they will cause electric spark. PLEASE
CAUTION RISK OF ELECTRICAL SHOCK!
Company Address:
T4，No. 41, High-tech 2 Road，East Lake High-tech Development Zone，
Wuhan
Sales Hotline: [phone]
After Service Hotline:[phone]
Fax: [phone]
E-mail: [email protected]
Website: www.hvtest.cc

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SERIOUS COMMITMENT
All products of our company carry one year limited warranty
from the date of shipment. If any such product proves defective
during this warranty period we will maintain it for free. Meanwhile
we implement lifetime service. Except otherwise agreed by
contract.
SAFETY REQUIREMENTS
Please read the following safety precautions carefully to avoid
body injury and prevent the product or other relevant subassembly
to damage. In order to avoid possible danger, this product can only
be used within the prescribed scope.
Only qualified technician can carry out maintenance or repair
work.
--To avoid fire and personal injury:
Use Proper Power Cord
Only use the power wire supplied by the product or meet the
specification of this produce.
Connect and Disconnect Correctly
When the test wire is connected to the live terminal, please do
not connect or disconnect the test wire.
Grounding
The product is grounded through the power wire; besides, the
ground pole of the shell must be grounded. To prevent electric

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shock, the grounding conductor must be connected to the ground.
Make sure the product has been grounded correctly before
connecting with the input/output port.
Pay Attention to the Ratings of All Terminals
To prevent the fire hazard or electric shock, please be care of
all ratings and labels/marks of this product. Before connecting,
please read the instruction manual to acquire information about the
ratings.
Do Not Operate without Covers
Do not operate this product when covers or panels removed.
Use Proper Fuse
Only use the fuse with type and rating specified for the product.
Avoid Touching Bare Circuit and Charged Metal
Do not touch the bare connection points and parts of energized
equipment.
Do Not Operate with Suspicious Failures
If you encounter operating failure, do not continue. Please
contact with our maintenance staff.
Do Not Operate in Wet/Damp Conditions.
Do Not Operate in Explosive Atmospheres.
Ensure Product Surfaces Clean and Dry.

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－Security Terms
Warning: indicates that death or severe personal injury may
result if proper precautions are not taken
Caution: indicates that property damage may result if proper
precautions are not taken.

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Contents
I. Overview········································································ 6
II. Intrinsic Error·································································· 6
III. Operating Error······························································ 7
IV. Other Technical Specifications·········································· 8
V. Product Structure···························································· 9
VI. Notes··········································································· 9
VII. Operation Instructions··················································· 10
VIII. Adjust the display························································ 12
IX. Battery replacement······················································ 12

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I. Overview
SMG2000B Double Clamp Digital Phase Meter is specially designed for
measuring voltage, current and phase. It is characterized by high precision,
low price, portable hand-held and dual-channel input measuring. It’s easy to
measure the phase between U-U, I-I and U-I, identify the inductive/capacitive
circuit and the phase sequence of three-phase voltage, check the wiring group
of transformer, test the secondary circuit and busbar differential protection
system, display the phase relationship among the CT groups of a differential
protection system, and check if the wire of electric meter is correctly connected.
Under test, you do not need cut off the tested current which is inputted by
clamp-current transformer. When measuring the phase between U1 and U2,
the two input circuit loops are completely isolated, so it can completely avoid
short circuit and burning down the meter caused by misconnection. The
display of this device is high-contrast LCD screen, and the character in which
could be as high as 25mm, and can be freely rotated approximately 70 ° to
obtain the best visual effects.
The shell of the device is made of engineering insulating material,
together with a rubber anti-vibration protection casing for safety and reliability.
II. Intrinsic Error
1. Operating Conditions
1) Temperature:（23±5）℃
2) Relative humidity:（45～75）%
3) Wave forms of measured signal: Sine wave, β=0.02
4) Frequency of measured signal: 50±0.2）Hz
5) Position of Measured current carrying conductor in clamp jaw:
Optional position
6) Amplitude range of measured signal when measuring phase: 100～
220V, 0.5A～1.5A

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7) External reference frequency electromagnetic interference: Should
be avoided
2. Limits of Intrinsic Error
1) AC Voltage（see Table 1）
Table 1：Error of AC Voltage
Measure range
Resolution
Limits of intrinsic error
20V
0.01V
±（1.2%RD+2）
200V
0.1V
±（1.0%RD+2）
500V
1V
±（1.2%RD+2）
Input Impedance：All measure ranges input 2MΩ
2)AC current（see Table 2）
Table 2：Error of AC current
Measure range
Resolution
Limits of intrinsic error
200mA
0.1mA
±（1.0%RD+2）
2A
1mA
10A
10mA
3) Phase
U-U、U-I、I-I（see Table 3）
Table 3：Error of Power-frequency Phase
Range
Resolution
Limits of intrinsic error
0～360°
1°
±3°
Loop impedance of input voltage when measuring phase U1-U2：40KΩ
III. Operating Error
1. Rated Operating Conditions
1) Temperature:（0～40）℃
2) Relative humidity:（20～80）%
3) Wave forms of measured signal: Sine wave, β=0.05
4) Frequency of measured signal:（50±0.5）Hz

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5) Position of Measured current carrying conductor in clamp jaw:
optional position.
6) Amplitude range of measured signal when measuring phase:
Phase U1-U2: 30V～500V
Phase I1-I2: 10mA～10.00A
Phase U1-I2 or I1-U2: 10V～500V、10mA～10.00A
7) External reference frequency electromagnetic interference: Should be
avoided
2. Limits of Rated Operating Error
In item 1 Rated Operating Conditions, the limits of rated operating error
should not more than twice limits of intrinsic error.
IV. Other Technical Specifications
1. Display: three and half bits
2. Sampling Rate: 3 times per second
3. Power Supply: single 9V laminated battery, supply current is less than
5mA
4. Dimensions
Meter shell: 192x95x55mm
Clamp shell: 140×42×20mm
Clamp jaw: Φ7×9mm
5. Weight
Meter body: 280g
Measuring clamp: 2×200g
6. Storage Conditions
Temperature: －10℃～50℃

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V. Product Structure
1.insulating protection casing
2.three and half bits LCD
3.ON/OFF button
4.measure range switch
5.current clamp jack（2 loops）
6.voltage input jack（2 loop）
7.current clamp jaw
8.current clamp jaw
9.down-lead of current clamp
10.crocodile clip（4 pieces）
11.test lead（4 pieces）
12.shorting stub（1 piece）
VI. Notes
1. Withstand Voltage
Parts between voltage input terminal and meter shell and parts between
the iron core and handle of the clamp-current transformer and secondary
windings can withstand 1000V/50Hz. Parts between the two voltage input
terminals can stand Sinusoidal AC Voltage 500V/50Hz for 1min when testing.
2. Insulation Resistance
Insulation resistance between meter circuit and meter shell is more than
or equals 10MΩ, insulation resistance between the two input terminals is also
more than or equals 10MΩ.

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VII. Operation Instructions
Press the ON/OFF button; turn the measure range switch to choose the
correct testing parameters and range.
1. Measuring AC voltage
Turn the rotary switch to 500V in U1 region, and connect the measured
voltage into jack U1, you can measure. If the measured value is less than 200V,
you can directly turn the switch to 200V in U1 region to obtain better
measurement accuracy.
The two channels U1, U2 are provided with the same voltage test function,
so you can make the measurement through channel U2. Detailed methods
please refer to the operation of U1.
2. Measuring AC current
Turn the rotary switch to 10A in I1 region, and connect the down-lead of the
clamp-current transformer into jack I1, then clamp the measured circuit with
clamp jaw, you can measure. If the measured current is less than 2A, you can
directly turn the switch to 2A in I1 region to obtain better measurement
accuracy.
The two jacks I1, I2 are provided with the same current test function, so
you can make the measurement through jack U2. Detailed methods please
refer to the operation of I1.
3. Measuring phase angle between two voltages
When measuring the phase angle that U2 lags U1, turn the rotary switch to
parameter U1U2.Under measurement, you can turn the rotary switch clockwise
to different measure ranges in U1 region to measure input voltage U1, or turn
the rotary switch anticlockwise to different measure ranges in U2 region to
measure input voltage U2.
Note: When measuring phase, the marks U1, U2 around voltage input
jacks and the red "*" mark on clamp-current transformer are phases with the
same name end.

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4. Measuring phase angle between two current
When measuring the phase angle that I2 lags I1, turn the rotary switch to
parameter I1I2.Under measurement, you can turn the rotary switch clockwise
to different measure ranges in I1 region to measure input current I1, or turn the
rotary switch anticlockwise to different measure ranges in I2 region to measure
input current I2.
5. Measuring phase angle between current and voltage
Input the voltage into U1, input the current into I2 by using measuring
clamp I2, and turn the rotary switch to parameter U1I2 to measure the angle
that the current lags the voltage. Under measurement, you can turn the rotary
switch clockwise to different measure ranges in I2 region to measure current or
turn the rotary switch anticlockwise to different measure ranges in U1 region to
measure voltage.
You can also input the voltage into U2, input the current into I1 by using
measuring clamp I1, and turn the rotary switch to parameter I1U2 to measure
the angle that the voltage lags the current. Under measurement, in the same
way, you can turn the rotary switch to measure I1 or U2.
6. Judge phase sequence of the three-phase three-wire distribution
system
Turn the rotary switch to U1U2. Connect phase A of three-phase
three-wire system into jack U1, connect phase B to jack “±” that match with U1
and “±” that match with U2, and connect phase C to jack U2. If the measured
phase value is approximately 300°, then the measured system is positive
phase sequence; if the measured phase value is approximately 60°, then the
measured system is negative phase sequence.
Another method: Connect phase A into jack U1, connect phase B to jack
“±” that match with U1 and jack U2, and connect phase C to jack “±” that match
with U2. If the measured phase value is 120°, then the measured system is
positive phase sequence; if the measured phase value is 240°, then the
measured system is negative phase sequence.

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7. Judge phase sequence of the three-phase four-wire system
Turn the rotary switch to U1U2, connect phase A to jack U1, connect
phase B to jack U2, connect Zero Line to the two input loop jacks “±”. If the
measured phase value is approximately 120°, it is positive phase sequence. If
the measured phase value is approximately 240°, it is negative phase
sequence.
8. Judge inductive load and capacitive load
Turn the rotary switch to U1U2. Connect load voltage to input jack U1, and
connect load current into jack I2 with measuring clamp. If the phase value
ranges from 0 °~ 90 °, then the measured load is inductive ; If the phase value
ranges from 270 °~ 360 °, then the measured load is capacitive.
VIII. Adjust the display
If you want to change the angle of the display screen, press the lock button
on the top of the display screen, and adjust the screen to the most appropriate
angle for observation.
IX. Battery replacement
When the symbol appears on the LCD, it indicates the battery
power is low. You should replace the battery.
Before replacing the battery, please disconnect the input signal and turn off
power supply. Loosen the screw secured on the rear case and remove them,
then you can replace the battery.

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