Huazheng HZ-3110 User manual

HZ-3110
Transformer DC Resistance
Tester
Huazheng Electric Manufacturing (Baoding) Co., Ltd

Contents
I. Introduction............................................................................................................................ 1
II. Safety Measure.................................................................................................................... 1
III. Configuration....................................................................................................................... 1
IV. Technical Data.....................................................................................................................2
V. Presentation Of The System..............................................................................................2
VI. Test and Operating.............................................................................................................3
VII. Caution................................................................................................................................9
VIII. Guarantee and After Sales Service.............................................................................. 9
IX. Packing List......................................................................................................................... 9

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I. Introduction
The DC resistance is the transformer’s semi-finished product, finished product test,
installation, commissioning test, and electric part prevention test necessary test
project,the transformer coil can effectively find the device welding, connecting parts loose,
missing unit, disconnection, and other manufacturing default and other hidden danger
occurred after operation.
The DC Resistance transformer to meet fast measurement requirement, we developed
HZ-3110 DC Resistance Tester. The instrument is a newpowerful technology, small size,
light weight, high output current and other characteristics.
The device is controlled by the microcontroller, with a high degree of automation,
automatic discharge functions. It is a test instrument of high precision, simple, direct way
to achieve fast transformer measurement.
II. Safety Measure
1. Before using this equipment you must carefully read the manual.
2. The equipment operator should have electric general knowledge.
3. Avoid putting the equipment in the contact of the rain, corrosive gas, dust, high
temperature, direct sunlight, and other places.
4. Severe vibration has to be avoiding for gauges.
5. Only an expert must maintain and adjust the equipment .
6. After the test, the user must wait till the discharge alarm stopped before switching off
the device, and plugging off the test cables.
7. To measure no-load regulating transformers, the user has to wait till the discharge
instructions alarm stops before switching stalls.
8. During testing, do not move the testing clamp and cables.
III. Configuration
1. Whole instrument controlled by high speed SCM, high automatic degree and simple
operation.

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2. The instrument adopts advanced power supply technology, with multiple current
position, test range is wide, suitable for testing DC resistance of large and medium size
transformer.
3. Has a complete circuit protection, reliable.
4.Discharge alarm, discharge indicator clear, reduces misuse.
5. Quick response speed, can be directly converted to load tap switch at measuring state,
the instrument automatically refresh data.
6.Intelligent power management technology, instrument is always working at minimum
power state, effective energy saving, reduce heat.
7.320 x240 matrix of ultra small pixel 65Ktrue color LCD.
8.With calendar clock and power storage, can store 1000 groups data, can be check at
any time
9.With RS232 and USB interface, computer communications and U disk storage.
IV. Technical Data
1. Output current：<20mA 、40mA、200mA、1A、5A、10A
2. Resolution：0.1μΩ
3. Range：0.5mΩ～0.8Ω （10A）
1mΩ-2Ω （5A）
5mΩ-10Ω (1A)
100mΩ-50Ω (200mA)
1Ω-250Ω （40mA）
100Ω-20KΩ （<20mA）
4. Accuracy：±(0.2%+2 Readings)
5. Operating temperature：0~40℃
6. Ambient humidity：≤90%RH，(non condensed)
7. size: 425*210*285 mm.
8. Instrument weight :11kg
V. Presentation Of The System
Instrument panel (see the picture):

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~220V：Power switch, machine power input, AC socket, safety and switch.
：Earthed terminal，used for whole instrument earthing,for safety protection.
RST：machine restore the initial status，pre-set the current output.
Circle: select menu.
SEL：Setup the current after the tester was reset.
S-up key：press the key after selecting the current; The microcomputer control to realize
all testing process.
I+、I-：Current output terminals ,I+ is the positive current; I- is the negative current.
V+、V-：Voltage input terminals, V+ is the positive voltage;V- is the negative voltage.
RS232: Universal series interface, can controlled by computer;
USB: Can output the testing results to USB.
VI. Test and Operating
1.Connection ：Connect the testing product to the device through test terminal, joint

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firm;meanwhile insure a well connection of the earthing wire.
A: Single phase testing method, to see the following drawing.
B. magnetic assisted connections see picture 3 to 5 （suitable Y（N）-d-11junction group）

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Picture 3, 4, 5 respectively measure low voltage Rac, Rba, Rcb connection
2. Instrument operation instructions:
1) The boot interface displays as shown in figure 1:

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Figure 1
Figure 2
The cursor can be moved between Current selection, Phase splitting, Winding
temperature, Conversion temperature, Data query, Clock modification, Host
parameters and other options by pressing the cycle key. The selection key can be
used to select the options contained in the seven main menus mentioned above.
When the cursor chooses the current, press the selection key to select the current.
When the cursor is separated, when the cursor is separated, press the select key,
and the phase can be displayed cyclically between AB, BC, CA, AO, BO, CO, ab, bc,
ca, ao, Bo and Co. Press the start key to move the cursor to the tap, press the select
key number to change between 0-9 (10 bits), press the start key to move the cursor to
one bit, press the select key number to change between 0-9.
When the cursor is in the winding temperature, pressing the start key can make the
cursor scroll between three data bits, and the selection key can make the data of
each data bit circulate between 0 and 9.
When the cursor is in the conversion temperature, press the select key, reduced

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temperature in the 20 ℃(copper), 20 ℃(aluminum), 75 ℃(copper), 75 ℃
(aluminum), 85 ℃(copper), 85 ℃(aluminum), 90 ℃(copper), 90 ℃(aluminum),
115 ℃(copper), 115 ℃(aluminum), 120 ℃(copper), 120 ℃(aluminum), 125 ℃
(copper), 125 ℃(aluminum), 145 ℃(copper), 145 ℃(aluminum), 150 ℃(copper),
150 ℃(aluminum) between cyclic display.
When the current option is any option except winding temperature, press the start
button to start measurement.
2) After selecting the current, press the start button to start charging. LCD display
"charging". After a few seconds, "Testing" is displayed, indicating that the charging is
completed and the test state is entered. After a few seconds, the test results will be
displayed, as shown in figure 3:
Figure 3
3) Move the cursor to the "data query" menu in the startup interface, and then press
the "select" key to enter the data query, as shown in figure 4:
Figure 4

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In figure 4, when the cursor is in "Data query", press "select" to scroll up data and "Start"
to scroll down data.
4) In figure 2, press the loop key to move the cursor to the clock modification, and press
the select key to enter the clock modification interface.
Figure 5
Press the loop key to move the cursor between date data, press the select key to reduce
data, and press the start key to increase data.
5) Move the cursor to the host parameters in figure 2, then press the select key to enter
the interface as shown in figure 6:
Figure 6
Press the loop key to move the cursor. When the cursor increases the screen brightness,
press the select key to increase the screen brightness. When the cursor decreases the
screen brightness, press the select key to lower the screen brightness. When the cursor is
releasing storage space, press the select key to clear the stored data.