1ZHZ8 type high voltage tester overview
This series of withstand voltage tester is suitable for all kinds of motor, electrical appliances, instruments and appliances, safety and power system voltage and leakage current test. The instrument has the advantages of convenient operation, safe and reliable, good performance, convenient maintenance. Is in line with the GB4706.1 Safety of household and similar electrical appliances "and" General requirements GB9706.1 "General medical electrical safety requirements" and GB4943 , GB4793 Test and other relevant provisions of the national standard requirements of test equipment required. This instrument is carried out Q/TPGG2ZHZ A series of high voltage insulation resistance tester standard enterprise, Q/TPGG6ZHZ8D High voltage tester standard enterprise.
Voltage Tester Specification and technical characteristics of 2ZHZ8 type resistance
2.1 basic error, output voltage, leakage current, current and preset alarm tolerance.
Model ZHZ8AZHZ8ZHZ8D
capacity KVA0.50.7510.50.75
output voltage KV0-50-50-50-100-10
The basic error (. Five % R+3d )
leakage current MA0.5-200.5-1000.5-2000.5-200.5-100.5-1000.5-200.5-200.5-20
Tolerance (. Five % R+3d )
The current alarm MA0.5-200.5-1000.5-2000.5-200.5-100.5-1000.5-200.5-200.5-20
Tolerance (. Five % R+3d )
2.2 product features
There are two kinds of pointer and digital a display.
B can display in the test samples on the leakage current value.
C has a preset time and display test time countdown.
D can be arbitrarily set the alarm value of current.
The e output waveform 50Hz Sine wave or dc.
2.3 test time, size and weight.
2.4 conditions of use
temperature Zero C ~ Forty C
The relative humidity is not more than Eighty %
No strong electromagnetic interference source, without a lot of dust and corrosive gas, good ventilation.
2.5 AC power supply 220V Tolerance. Ten %, 50Hz .
3ZHZ8 type voltage resistance tester structure and working principle
3.1 working principle
Withstanding voltage tester is composed of high voltage boost circuit (test voltage to adjust the output energy required), leakage current detection circuit (set alarm current) and value indicating instrument (direct readout output voltage and leakage current value < The alarm or breakdown current value ">> ). In the test, the measured at the time stipulated in the provisions of the testing voltage, automatically cut off the output voltage instrument; once the breakdown, i.e. the leakage current exceeds the set alarm current will alarm.
3.2 instrument function key layout:
1 "power switch" Two The "start" button
3 "time" button Four The "reset" button
5 "the preset time" or "time" Six The voltage adjust knob
7 wire joint Eight The high voltage DC output end "
9 "AC high voltage output ends Ten "Ground" terminal
11 alarm indicator Twelve The "test" indicator
13 "voltage indicator unit" Fourteen "Voltage" display
15 "leakage indicator unit" Sixteen "Leakage" display
17 "test time unit" indicator Eighteen "The test time"
19 "leakage current preset" button Twenty The leakage current test / Preset key
21 "leakage current range" conversion key Twenty-two "Exchange / DC conversion key
23 "voltage range" conversion key Twenty-four "Power" indicator
1 power socket Two "Ground" terminal
3 nameplate
4ZHZ8 type voltage resistance tester safety precautions
4.1 before using please read the instructions and follow the instructions step in operation.
4.2 do not use non original accessories, in order to avoid danger.
4.3 instruments and the measured object must be well grounded, not allowed to tie in the tap water pipe.
4.4 the instrument to generate sufficient pressure caused casualties. In order to prevent electric shock accidents, before using this equipment, please wear insulating rubber gloves, foot pad insulation rubber pad, and then the relevant operation.
4.5 when the instrument is in the test mode, please do not touch the test line, the analyte, and the output end of the test stick.
4.6 do not make the short circuit test line, the wire line and the AC power line, lest the whole instrument charged.
4.7 when testing a sample, to replace another object to be measured, should make the test instrument in the "reset" and "test" lights out and showing the value of voltage" Zero "State. Special note: during the test, please do not touch the high-voltage testing head, so as to avoid accidents.
4.8 when the power switch is switched off, such as open again, you need to wait a few seconds later, don't take action for the power switch on and off, in order to avoid the wrong actions damage the instrument.
4.9 instrument no-load test, leakage current will have value.
Because of the low end instrument current sampling circuit in high voltage circuit (near ground loop).
When the voltage to high voltage, the leakage current of high voltage transformer itself through the core into the current detecting circuit, caused by no-load leakage current has little value. This is a normal phenomenon, does not affect the test accuracy.
In the following 4.10 to avoid the use of the environment:
Avoid placing the sun a.. The rain or damp place.
B. please away from fire and heat, to prevent the high temperature of the machine.
C. handling or maintenance, should be shut down and will remove the power line.
5ZHZ8 type high voltage test instrument use and operation
5.1 preparation
The 5.1.1 is switched on, the power switch is in the "on" position.
At this time, display output voltage, leakage current and time of the digital tube and the "test unit" indicator Ying Liang.
5.1.2 counterclockwise rotation "voltage adjusting knob" in the end, the value is zero, then the instrument is in the initial state.
5.2 function keys and settings
The current alarm set 5.2.1
According to the current alarm value selection alarm current range, press the "leakage current test / Preset key, adjusting the leakage current preset potentiometer, and observe the leakage current display value reaches the desired value alarm window, stop adjustment leakage current preset potentiometer, and then release the "leakage current test / Preset "button, the leakage current is set.
5.2.2 timer
The "timing" button in the "on" position.
The output voltage of 5.2.3 set
Select the 5.2.3.1 type or output voltage range
ZHZ8D need to communicate / "In the DC conversion key" AC "Or" DC "And with AC and DC high voltage output end of the corresponding.
The output voltage of 5.2.3.2 set
Click "start" button, according to the required test voltage, clockwise rotation of the voltage adjust knob, and observe the value to achieve the required voltage output voltage value of the window, stop turning the voltage adjusting knob, and maintain the voltage adjust knob position, press the "reset" button, the test voltage setting is finished.
5.3 steps
5.3.1 in determining the output voltage value for instrument" Zero "The test light" out "under the condition of high pressure test line (red) corresponding to one end is inserted into the instrument ( AC or DC The high voltage output end), and the other end of the power input end of the analyte or other live parts are connected. Another test ground wire (black) end is inserted into the ground terminal of the device is locked, and the other end of the analyte shell (metal) or the power input terminal is connected to ground (if the object to be measured with the earth or the instrument is connected to the ground, the ground strap must be with it).
5.3.2 press the "start" button, the "test" indicator light, value is the current value of the test voltage in voltage, leakage current value as measured on the current leakage current value, such as the object to be measured for qualified products, test time, silent light alarm, at the same time, the output voltage is automatically cut off; test failed in the test period, the alarm lights, buzzer alarm, automatically cut off the output voltage of the instrument, can press the "reset" button to eliminate the alarm.
5.3.3 wire terminals are voltage resistance test (panel on the "start" and "reset" button is disabled,) the "timing" button in the "off" position.
A. buy the company's production of wire rod for a test, the black ground wire end is inserted into the instrument grounding terminal, the grounding end of the other end is clamped by the measured object, the wire rod is inserted into the instrument by wire plug socket, high-voltage plug rod insertion high-voltage output end; then the needle rod contact test the measured live parts, press the test button on the rod "start", loosen the button "reset".
B. wire interface pin definition
When the wire connection to. Four , Five The foot is closed, the instrument "start"; One , Two The foot is closed, "reset instrument". (note:
Lead wire length not more than 2m , the control signal is passive contact).
6 common faults and troubleshooting
6.1 no power supply indicator, the display does not light:
A. please check the power supply is normal, if not normal check 220V , and is in accordance with the scope of the normal use of equipment;
B. please check whether the fuse is damaged, if the fuse is damaged, please replace the same type of fuse;
C. please check whether the power transformer output, if there is no output, replace the power supply transformer;
Please check the D. voltage regulator circuit Seven thousand eight hundred and twelve If damaged, if damaged please change Seven thousand eight hundred and twelve .
6.2 boot alarm:
Please check the A. leakage current switch board sampling resistor is damaged, if damaged, please replace the file corresponding to the sampling resistor ;
Please check the B. LM324 Whether there is damage, if damaged, please replace LM324.
There are 6.3 boot voltage indicator
Please check the A. SCR is damaged, if damaged, please replace the same specifications of scr;
Please check the b.. Three thousand and sixty-one If damaged, if damaged, please replace Three thousand and sixty-one .
6.4 start in the testing state
Please check the a. NE556 If damaged, if damaged, please replace NE556.
Please check the B. start button is damaged, if damaged, please replace the start button.
6.5 instrument start reset failure
Please check the a. NE556 Whether the damage.
Please check the startup b.. The reset button is damaged, if damaged, please replace the start, reset button.
6.6 boot press the start button, measuring the lamp, but no voltage indicator
Please check the A. high voltage transformer is damaged, if damaged, please replace the high voltage transformer.
B. please check the voltage meter is damaged, if damaged, please replace the voltage meter.
6.7 leakage current without indication
Please check the A. current meter is damaged, if damaged, please replace the current meter.
Please check the B. Two hundred and twenty Omega /5W The resistance is damaged, if damaged, please replace Two hundred and twenty Omega /5W Resistance.
Please check the C. LM324 If damaged, if damaged, please replace LM324 .
7 calibration
7.1 output voltage:
The instrument is in the "reset", counterclockwise rotation "voltage adjusting knob" in the end, according to the diagram Five Wiring. Press the "start" button and adjust the voltage adjust knob, the pressure gauge readings for the table Three The detection point shown in numerical calculation and instrument indication and reading error of pressure gauge whether meet the technical indicators, such as whether it can adjust the corresponding potentiometer values.
7.2 leakage current and current alarm
7.2.1 leakage current
The instrument is in the "reset", counterclockwise rotation "voltage adjusting knob" in the end, according to the diagram Six Wiring "leakage current range" in the conversion key 2mA File. According to table Four Select the corresponding load resistance.
Electric current MA0.5125102050100200
Load resistance K Omega /w1000/1500/1250/1100/250/525/1010/255/502.5/100
Press the "start" button, the "test" indicator light, slowly rotating the voltage adjust knob to (500V Voltage calibration ) Look around, the digital current meter display 1mA (calibration reference current), then adjust W8 Potentiometer (pointer adjustment RP1 The instrument, potentiometer) leakage current value to 1mA . Check the other points of leakage current error is in accordance with the table One In the specified value.
7.2.2 alarm current
In the calibration of reference current 1mA At the correct time, transfer W7 Potentiometer (pointer adjustment RP1 The alarm, potentiometer). Check the alarm current error of each point is in accordance with the table One In the specified value.
8 complete
A voltage resistance tester
A power line
A test bar
Use a manual
Product certificate
9 other
9.1 the instrument should be to keep the temperature in the room Zero C ~ Forty C, relative humidity of not more than Eighty %, and in the air does not contain harmful substances to cause corrosion.
9.2 instruments from the user purchase date Twelve Within a month, when users use fully comply with the rules in the specification, and the user does not attempt to change the instrument internal structure, it is found that the instrument can not work normally, the factory responsible for free to replace or repair.
9.3 manufacturing plants have the right to change without notice of the instrument.
L EFUP
Poisonous and harmful substances or elements contained in the instrument is not used in the normal conditions, leakage or mutation, users use the instrument will not cause serious pollution to the environment or causing serious damage to the person and property of the period Ten Year. The poisonous and harmful substances or elements of the name and content identification.
A body of XXX, XXX
Shell plating XXX X Eighty
LCD screen X Eighty X Eighty
Circuit board X XXX, eighty
Contactor X XXX, eighty
Transformer ( Pressure regulator X) XXX, eighty
switch X XXX, eighty
Ten: the concentration of the hazardous substance in all homogeneous materials in the parts are in SJ/T11363-2006 The standard limits for the following.
X said: this hazardous substance contained in at least one of the homogeneous materials. SJ/T11363-2006 Limit standard requirements.