ZC46A type super high resistance tester overview
ZC46A type high insulation resistance measuring instrument for measuring insulation resistance of insulation materials, electrical products, various components; matching with constant temperature water bath, plastic wire and cable can be measured at different temperatures (no shielding layer) insulation resistance, the instrument has high measuring accuracy, stable performance, simple operation, high voltage input terminal short circuit protection the advantages of the highest range instrument Ten Resistance value. This instrument to carry out Q/TPGG7-2008 High insulation resistance meter enterprise standard.
ZC46A type super high resistance tester specification and technical characteristics and conditions of use
2.1 specifications and main technical parameters
2.1.1 test voltage and measuring range
The test voltage ( V Error)
DC- 10V . 5%
DC- 50V . 5%
DC- 100V . 5%
DC- 500V . 5%
DC- 1000V . 5%
2.2 conditions of use
The environment temperature: Zero ~ Forty C
The relative humidity is less than or equal to: 70%
The power supply voltage: AC 220V . 10%50Hz
2.3 instruments can work continuously Eight hour
Power consumption: about 2.4 10W
2.5 dimensions: length width depth 355mm * 320mm * 145mm
Weight: about 2.6 (6kg Host )
ZC46A type super high resistance structure and working principle of testing instrument
The 3.1 meter structure mainly consists of five parts:
DC voltage output Ten , Fifty , One hundred , Five hundred , 1000V Five
According to the sample resistance value and the DC voltage value selection range rate right.
The high input impedance amplifier (DC input impedance 10">>10 Omega)
The indicator indicates the measured insulation resistance.
Each part of the power supply power supply apparatus.
3.2 instrument for high resistance test is the main principle of figure Two As shown in the test sample tested resistance Rx The high impedance input resistance and DC amplifier ( Resistance rate ) " Ro "In series and connected across the DC power supply , High impedance DC amplifier and the input resistance" Ro "On the divided voltage Uo After amplification evacuation indicator measuring insulation resistance value, and press ( One Calculation of insulation resistance). U Test voltage Ro The voltage of the sampling resistance rate UoRx Is a kind of insulation resistance test Ko As the magnification of the amplifier
3.3 instrument function key layout
1, indicator Two Rate selection switch Three Voltage selection switch
4, the power switch Five Discharge test switch Six And high output
7, the test input port Eight "For adjusting potentiometer Nine Semicircle dial
ZC46A type super high resistance tester safety precautions
4.1 read the instructions before use, and follow the instructions step in operation.
4.2 do not use non original accessories, in order to avoid danger.
4.3 when testing the instrument for measuring high voltage output end with DC voltage output, no human contact, so as to avoid the electric shock.
4.4 in order to avoid the error caused by the insulation leakage test bar itself, the instrument for measuring input test bar should be suspended, do not collide with the external object.
4.5 when the measured value of insulation resistance is high, and the instability phenomenon existed in the measurement of the pointer, the instrument for measuring the shielding end of the clip connection. For example: the insulation of cable and cable test cable core shell, except for the ends of the measured object are respectively connected to the input end and the high end, then the cable between the inner core shell, insulation instrumentation" G "In order to eliminate the measurement errors due to surface leakage caused by. Can also be used with shielding box method is measured on a metal shielding box, measuring wires.
Methods: 4.6 meter reading on the scale 10V , 50V , 100V, Under the scale 500V , 1000V .
4.7 after the test is completed, connecting line can be removed.
4.8 devices should not be used and stored in sunlight, high temperature and high humidity.
4.9 the instrument display range should be effective Ten - One If the head pointer indication 10">>10 Should be a higher range switch
ZC46A type super high resistance tester connection and method of operation
5.1 high resistance test wiring
5.2 zero adjustment
5.2.1 mechanical zero adjustment
The ratio of the switch to the Ten The voltage to test file 10V The file will discharge test switch is arranged in the discharge header files, observe the pointer is in "infinity" (mechanical zero line), if not in the "infinite" line (mechanical zero) must be transferred to the head pointer on quotupquot line (mechanical zero), is about to adjust the head pointer below the semicircular dial disc.
5.2.2 electrical zero adjustment
Switch on and switch on 220V Voltage instrument began to work at the pointer at the quotupquot position, and preheating Thirty Minute ( Note that the test environment is less than or equal to 70% Otherwise it will affect the test accuracy ) . When the voltage at 10V When the file, again observe the head pointer is deviated from the quotupquot line, adjusting for adjustment potentiometer, the pointer to line at infinity. If the insulation resistance is greater than Ten (omega 1000M Omega) should be tested in order to avoid interference shielding.
5.3 samples will be tested , For the measurement of cable and cable connected to the high voltage test Rx The input button and a high voltage output end.
5.4 will be the test voltage selection switch at the required test voltage.
5.5 the discharge test switch in the test file:
If it is found that the A pointer soon hit full , To find out the reasons for further testing ( This may be the largest measured sample may be short. )
If no B header number or rarely indicate continued , Can be a higher rate switch , And repeat this operation until the reading on the dial gauge 1-10 Between。
5.6 in the measurement of insulation resistance , If there is a rising phenomenon of pointer , This is because the absorption phenomenon caused by the media , If for a long time is not stable , Under normal circumstances the test switch is closed after one minute , As the insulation resistance value of the sample readings.
5.7 a test. , The forthcoming "discharge test" , The switch is in the "discharge" position , In order to remove the specimen , For the samples of large capacitance ( About Zero point zero one Mu F Above ) The discharge side about a minute to remove the sample , In order to prevent the residual voltage of the sample capacitor in electric shock.
After being used 5.8 instruments , You should cut off the power , The panel on each switch in the test position (rate selection switch in Ten In the file, the voltage selector switch 10V Discharge test file, switch in the "discharge state").
5.9 by volume resistance and surface resistance of material test insulated three electrode system.
The corresponding terminal connecting apparatus and electrode box.
The measured electrode material specimen is placed in the box, inside the red crocodile clip measuring electrode, black alligator clip to protect the electrode (between the electrodes do not contact each other, otherwise it will damage the instrument).
1) test sample volume resistance when selecting switch is arranged in the box on the electrode Rv At this time, the state of the three electrode.
2) test specimen surface resistance when selecting switch is arranged in the box on the electrode Rs At this time, the state of the three electrode.
( One The measuring electrode () Two No protection (electrode) Three The electrode (protection) Four Test sample)
With 5.10 ZC46A The electrode box can measurement has anti-static rubber and plastic surface resistance. The sample will be tested on the platform of good insulation performance, the test electrode is put on the sample surface, and then the input end button instrument used for measuring the cable (input) connected with the main power poles, voltage output terminal test instrument (HV) connected with the ring electrode, as shown in Fig. Seven Shown.
5.11 and the constant temperature water bath after matching, can measure the insulation resistance of plastic wire and cable under the different temperature.
The measured cable immersed in water, the water should be insulated with earth ( Recommend the use of plastic barrels ) So, both ends of the conductive core wire out of the water at least 300mm . The instrument input and the measured wire cable is connected; metal high-voltage output end and a root into the water.
ZC46A Super high resistance tester
ZC46A type super high resistance tester notice
6.1 received Rx The test conductor must use high insulation shielding wire ( insulation resistance 10">>10 Omega ) The wire length should not exceed One M.
Measuring the insulation resistance of the grounding end of the specimen of the 6.2 instruments are used to generally not , In the test , The sample should be put in the plate on the high insulation , In order to prevent the leakage affect the test results.
6.3 motor test , When the electrical appliances such as electrical products , Should take the high pressure end larger or exposed electrode part connected to the instrument , In order to avoid interference.
6.4 of cable products , If the outer metal jacket can be part of this as an electrode , Connected to the high voltage end instrument , The core wire is connected to the input , For cable without sheath. , You can connect to any , But the sample must be placed in the metal shield , Cover the ground.
6.5 when high resistance test , General test voltage not exceeding 100V .
When the measured resistance is higher than 6.6 Ten Omega , The sample should be placed in a shielding box , The box shell grounding.
6.7 test samples and samples close to the body can not contact , To prevent electric shock and impact test precision.
6.8 power supply wire clip and the shell does not allow short circuit.
6.9 Ten , Ten Stall resistance measured time should not be too long, because in Ten When the current reaches the resistance measuring circuit 100mA For a long time, sampling resistance, easy to burn out. The measured resistance does not allow short circuit.
7ZC46A type super high resistance tester common troubleshooting
7.1 after the current is switched on the power indicator light is not bright , Please check , The fuse is damaged.
7.2 after the power is switched on , The head pointer does not return to the infinity point , Please check whether the environmental humidity 70% Following , If the high voltage switch in "discharge" position , Override switch in Ten File.
7.3 in the test , Pointer deflection , Clockwise change rate switch without deflection , Check whether there is a high output high voltage output.
8 test methods
8.1 voltage check
The instrument "high output" and "ground" to end Nine With the input impedance at 10M The digital voltmeter is connected respectively readout instrument in rated voltage (Vsi) by 10V , 50V , 100V , 500V and 1000V When the input impedance at 10M On the digital voltmeter corresponding voltage value (Vsi) And, according to the ( Two ) type calculation error, should conform to table One Test voltage error.
8.2 resistance check
The instrument of the "high output" and "input" end to end Ten With adjustable high standard resistance box (Rsi) To be connected。 The resistance value of several optional high resistance box, to be stable when the instrument reads the corresponding display value (Rxi) , and press type calculation error should be consistent with the table Two The basic error in resistance.
9 sets of instruments
ZC46A type high insulation resistance measuring instrument One platform
Special test line One set
Power cord One root
An instruction manual One share
Certificate One Zhang
10 other
10.1 meters in transport and use, should be careful to avoid severe long-term vibration.
10.2 save instrument should not place the dust, the ambient temperature is Zero ~ Forty C, relative humidity of not more than 80% In the gas, and should not contain enough to cause corrosion of harmful impurities.
10.3 meter from the date of purchase Twelve Within a month, when the user fully comply with the instructions specified in the rules of use, and no unauthorized changes to the internal structure of the instrument case, found that the instrument is not working properly, then the manufacturer should be responsible for free to replace or repair.
10.4 manufacturing plants have the right to make changes without notice to the product.
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: the limited requirements of the content of toxic and harmful substances in at least one of the homogeneous materials beyond the SJ/T11363-2006 standard.