1 ZHZ8A type voltage resistance tester Summary
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/TPGG 2 ZHZ A series of high voltage insulation resistance tester standard enterprise, Q/TPGG 6 ZHZ8D High voltage tester standard enterprise.
2 ZHZ8A type voltage resistance tester Specification and technical characteristics
Two point one The basic error, output voltage, leakage current, current and preset alarm tolerance.
capacity KVA 0.5 0.751 0.5 0.75
output voltage KV 0-50-50-5 0-10 0-10
The basic error (. Five % R+3d )
leakage current MA0.5-20 0.5-100 0.5-200 0.5-20 0.5-10 0.5-100 0.5-20 0.5-20 0.5-20
Tolerance (. Five % R+3d )
The current alarm MA0.5-20 0.5-100 0.5-200 0.5-200.5-10 0.5-100 0.5-200.5-20 0.5-20
Tolerance (. Five % R+3d )
Two point two The characteristics of products
A A pointer and digital display two.
B Can display in the test samples on the leakage current value.
C Has the time preset and display test time countdown.
D Can be arbitrarily set the alarm value of current.
E Output waveform 50Hz Sine wave or dc.
Two point three Test time, size and weight.
Two point four The 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.
Two point five AC power supply 220V Tolerance. Ten %, 50Hz .
3 ZHZ8A type voltage resistance tester The structure and working principle
Three point one 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.
Three point two The instrument function key layout:
One The "power switch" Two The "start" button
Three The "timing" button Four The "reset" button
Five "The preset time" or "time" Six The voltage adjust knob
Seven "The wire" joint Eight The high voltage DC output end "
Nine "AC high voltage output ends Ten "Ground" terminal
Eleven Alarm indicator Twelve The "test" indicator
Thirteen "The unit of voltage indicator Fourteen "Voltage" display
Fifteen The leakage current indicator unit " Sixteen "Leakage" display
Seventeen "Test time unit" indicator Eighteen "The test time"
Nineteen The leakage current preset button Twenty The leakage current test / Preset key
Twenty-one The leakage current range "conversion key Twenty-two "Exchange / DC conversion key
Twenty-three The voltage range "conversion key Twenty-four "Power" indicator
Three Nameplate
4 ZHZ8A type voltage resistance tester Safety precautions
Four point one Before using please read the instructions and follow the instructions step in operation.
Four point two Do not use non original accessories, in order to avoid danger.
Four point three The instrument and the measured object must be well grounded, not allowed to tie in the tap water pipe.
Four point four This instrument has high enough for police 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.
Four point five When the instrument is in the test mode, please do not touch the test line, the measured object, and the output end of the test stick.
Four point six Don't make the short circuit test line, the wire line and the AC power line, lest the whole instrument charged.
Four point seven 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.
Four point eight 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.
Four point nine The 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.
Four point one zero Avoid using in the following circumstances:
A. Avoid placing the sun. The rain or damp place.
B. Please stay 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.
5 ZHZ8A type voltage resistance tester Use and operation
Five point one Preparing for use
5.1.1 Connect the power supply, 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.
Five point two Function keys and settings
5.2.1 The current alarm set
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 Timing setting
The "timing" button in the "on" position.
5.2.3 The output voltage setting
5.2.3.1 Select the type or range of output voltage
ZHZ8D The need to communicate / "In the DC conversion key" AC "Or" DC "And with AC and DC high voltage output end of the corresponding.
5.2.3.2 Output voltage setting
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.
Readings are as follows:
The instrument "voltage" display window directly read the output voltage value.
Five point three Operation steps
5.3.1 In determining the instrument output voltage value is shown" 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, automatically cut off the output voltage as measured; not qualified in the test time, 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 With the wire terminals are withstanding voltage test (panel on the "start" and "reset" button is disabled, "time) in the" off "button"
Position.
A. The company's production test separately by wire rod, the black ground 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 is contact test test 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: do not exceed the length of lead wire 2m , the control signal is passive contact).
6 ZHZ8A type voltage resistance tester With the common breakdown elimination method
Six point one 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;
D. Please check the voltage stabilizing circuit Seven thousand eight hundred and twelve If damaged, if damaged please change Seven thousand eight hundred and twelve .
Six point two Start alarm:
A. Please check the leakage current on the sampling resistance switch board is damaged, if damaged, please replace the file corresponding to the sampling resistor ;
B. Please check LM324 Whether there is damage, if damaged, please replace LM324.
Six point three The boot there is voltage indication
A. Please check the SCR is damaged, if damaged, please replace the same specifications of scr;
B. Please check. Three thousand and sixty-one If damaged, if damaged, please replace Three thousand and sixty-one .
Six point four Start in the testing state
A. Please check NE556 If damaged, if damaged, please replace NE556.
B. Please check the start button is damaged, if damaged, please replace the start button.
Six point five Instrument start, reset failure
A. Please check NE556 Whether the damage.
B. Please check the startup. The reset button is damaged, if damaged, please replace the start, reset button.
Six point six Press the start button after boot, measuring the lamp, but no voltage indicator
A. Please check the 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.
Six point seven There is no indication of leakage current
A. Please check the current meter is damaged, if damaged, please replace the current meter.
B. Please check Two hundred and twenty Omega /5W The resistance is damaged, if damaged, please replace Two hundred and twenty Omega /5W Resistance.
C. Please check LM324 If damaged, if damaged, please replace LM324 .
Seven calibration
Seven point one Output voltage:
The instrument is in the "reset" state, the counterclockwise rotation of the voltage adjust knob end connection. Press the "start" button and adjust the voltage adjust knob, the pressure gauge readings as shown in numerical calculation and testing, instrument indication and reading error of pressure gauge whether meet the technical indicators, such as whether it can adjust the corresponding potentiometer values.
Seven point two The leakage current and the current alarm
The leakage current and the current alarm terminal
7.2.1 leakage current
The instrument is in the "reset" state, the counterclockwise rotation of the voltage adjust knob in the end, Six Wiring "leakage current range" in the conversion key 2mA File. According to table Four Select the corresponding load resistance.
Electric current MA0.5 125102050100200
Load resistance K Omega /w1000/1 500/1 250/1 100/2 50/5 25/10 10/25 5/50 2.5/100
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 The current alarm
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.
Eight Complete
A voltage resistance tester
A power line
A test bar
Use a manual
Product certificate
Nine Other
Nine point one The instrument should keep the temperature in the room Zero C ~ 40 C, relative humidity of not more than Eighty %, and in the air does not contain harmful substances to cause corrosion.
Nine point two Since the date of purchase instrument users 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 giving free replacement
Or repair.
Nine point three Factory has the right to make changes 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 mark The following provisions of quasi limit requirements.
X Said: this hazardous substance contained in at least one of the homogeneous materials. SJ/T11363-2006 Limit standard requirements.