ZC36 type super high resistance tester overview
ZC36 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 precision, stability, simple operation, the advantages of high voltage short circuit input end so, the maximum range of instrument Ten 17 resistor values (test voltage 1000V and 10-14A Micro current). This instrument to carry out Q/TPGG7-2008 High insulation resistance meter enterprise standard.
ZC36 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 ( See table 1) Measuring range ( See table 2) Range and rate
The test voltage ( V Error)
DC- 10V . 5%
DC- 50V . 5%
DC- 100V . 5%
DC- 250V . 5%
DC- 500V . 5%
DC- 1000V . 5%
2.2 conditions of use
The environment temperature: Zero ~ Forty C
The relative temperature is less than or equal to: 70%
The AC power supply current: 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 )
ZC36 type super high resistance structure and working principle of testing instrument
The 3.1 meter structure mainly consists of five parts:
The high voltage DC output current Ten , Fifty , One hundred , Two hundred and fifty , Five hundred , 1000V Six.
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 15)
The indicator indicates the measured insulation resistance and micro current value.
Each part of the power supply power supply apparatus.
The 3.2 meter high impedance test as 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 meter, polarity switching Five And the power switch Six Discharge test switch
7, high voltage output Eight Earthing terminal Nine Input port
Function key layout
ZC36 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 measuring end E , L A DC high 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, instrumentation measuring end" L The 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 apparatus end shield" G "Connected. For example: the insulation of cable and cable test cable core shell, except for the ends of the measured object are respectively connected to" E "And" L "The 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 and shielding box instrumentation" G "End.
4.6 after the test is completed, connecting line can be removed.
4.7 devices should not be used and stored in sunlight, high temperature and high humidity.
4.8 the instrument display range should be effective Ten - One If the head pointer indication 10">>10 Should be a higher range switch
ZC36 type super high resistance tester commonly used connection method
5.1 high resistance test wiring diagram
5.2 will be put to override switch Ten 2, the test voltage to 10V Will the discharge switch is arranged in the header file, will put the key to open the polarity" Zero "The files on 220V The current instrument began to work at the pointer at the control position, and preheating Thirty Minute ( Note that the test environment is less than or equal to 70% Otherwise it will affect the test accuracy ). 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 the output end of the high pressure and
5.4 will be the test voltage selection switch at the required test voltage .
5.5 will the switch in the test file , The sample after a certain period of time after charging ( As the sample size depending on the general distribution of capacitance 15s, Large capacity when the charging time can be prolonged ), The meter can be put to the polarity switch" + "The files , At this time the number continued A If the pointer soon hit full , Immediately the header polarity switch" Zero "The files , To find out the reasons for further testing ( This may be the largest measured sample may be short B). If you find no 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 meter reading ( Megohm unit ) K-Ratio and test voltage multiplied by the magnification indicated by the switch (10V by K=0.01,50V by K=0.05100V by K=0.1250V by K=0.25500V by K=0.51000V by K=1) To be a kind of value of insulation resistance test , For example: Reading Two * Ten The coefficient of rate switch Ten Measuring voltage 500V The measured resistance Two * Ten * Ten * 0.5=10
5.7 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 .
5.8 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 5.9 instruments , Should first cut off current , The panel on each switch in the test position .
5.10 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.
Volume resistance Rv The measurement of surface resistance Rs
( One Protected (electrode) Two Do not protect the electrode) (3) Protect the electrode ( Four Test sample)
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.
5.12 micro current test:
( One The measured signal source) for the measurement of cable and wire Ix The test terminal and the ground terminal.
( Two The polarity switch) is polarity current signal corresponding to the micrometer" + "Or" - ".
( Three Override switch from x) 10-1
A file by change the ratio until clear reading.
( Four The reading will be) on the rate of instructions is micro current value. For example, reading Six point eight * 10-6 The rate of X 10-5 For the numerical. Six point eight * 10-6 * 10-5=6.8 * 10-11A .
( Five ) instrument for the next test, the specific steps as before. The instrument after use, should cut off the power supply, and will restore the switch on the panel to test the position before, remove all the wiring, the instrument is placed in the custody of.
6 note
6.1 received Rx, Ix The test conductor must use high insulation shielding wire ( insulation resistance 10">>10 Omega ) The wire length should not exceed One M.
6.2 this device can not be normally used to measure insulation resistance grounded at one end of the sample , 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 micrometer current "discharge", the test switch is arranged in the discharge position, the measured current source should be properly grounded, so as to avoid interference.
7 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 switching current , 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 Eight With the input impedance at 10M The digital voltmeter is connected respectively readout instrument in rated voltage (V) by 10V , 50V , 100V , 250V , 500V and 1000V When the input impedance at 10M The above digital voltmeter corresponding voltage value (V) , and press type calculation error should be consistent with test voltage error.
8.2 resistance check
The instrument of the "high output" and "input" end to end Nine 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 basic error resistance.
9 sets of instruments
ZC36 type high insulation resistance measuring instrument One platform
Power cord One root
Test line One pay
An instruction manual One share
Certificate One Zhang
10 options
The electrode box (special test line) is required
11 other
11.1 meters in transport and use, should be careful to avoid severe long-term vibration.
11.2 save instrument should not place the dust, the ambient temperature is Zero ~ Forty C, relative humidity of not more than 80% In the air, and should not contain enough to cause corrosion of harmful impurities.
The 11.3 instrument from the date of purchase Twelve Within a month, when the user fully comply with the instructions specified in the rules of use, and the user does not attempt to change 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.
11.4 factory has the right to change 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.