PC40B type digital insulation resistance tester (high resistance meter) overview
PC40B type digital insulation resistance tester ( High resistance meter ) For the vast resistance to measure the 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, easy operation etc.. This instrument is carried out Q/TPGG5PC40B Digital insulation resistance tester standard enterprise.
PC40B type digital insulation resistance tester (high resistance) specifications and technical characteristics
2.1 specifications and main technical parameters
2.1.1 test voltage and measuring range
The measurement range of 2.1.2 and the basic error
2.2 product features
A measurement range can be extended to One point nine nine nine * Ten 15.
B uses a high impedance amplifier, improve the measurement accuracy.
C 3 and a half digital display, intuitive readings.
The D input can be a short time short, does not damage the instrument.
E time display 1min ~ 99min .
2.3 conditions of use
ambient temperature Zero C ~ Forty C
The relative humidity is less than or equal to 70%
AC power supply 220V Tolerance. 10%50Hz
No strong electromagnetic interference sources in the studio, without a lot of dust and corrosive gas, good ventilation.
2.4 instruments can work continuously 8h
Power consumption is about 2.5 10W
2.6 dimensions L * B * H , Mm : Three hundred and fifty-five * Three hundred and twenty * One hundred and forty-five
The weight is about 2.7 (6.3kg Host )
PC40B type digital insulation resistance tester (high resistance meter) instrument structure and working principle
The structure of 3.1
Composed of DC high voltage test power supply, high impedance discharge test device, DC amplifier, power supply and display.
3.2 working principle
The high impedance test instrument as its main principle figure One Shown. During the test, the input resistance and high impedance DC amplifier test" R0 "Series and cross connected to DC high voltage power supply test. High impedance DC amplifier the input resistor divider signal after amplifying output to the display by the display readdirectly insulation resistance value.
1 "test of resistance" display Two "Time" display
3 "mode select switch" Four The voltage selection switch
5 "the resistance range selection switch Six "Input" end
7 "ground" end Eight The high voltage output end
9 "time" to set the dial Ten Time setting switch
11 "power switch"
PC40B type digital insulation resistance tester (high resistance) 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 received a wire input end of the instrument must use high insulation shielding wire (insulation resistance should be 10">>10 17), its length should not exceed 1m .
4.4 this device can not be normally used to measure insulation resistance grounded at one end of the object to be measured, in the test, the measured object should be placed in the plate high insulation, to prevent leakage, affect the test results.
4.5 testing of electrical products, should be high output larger or the exposed electrode part connected to the instrument side, so as not to outside interference.
4.6 of cable products, such as a metal sheath can be part of this as an electrode, connected to the high voltage output end of the instrument, the core wire connected to the input end of the cable jacket without protection, can be arbitrarily connected, but the measured object must be placed in a metal shielding cover, cover the ground.
4.7 high resistance test, general rated voltage 100V (to withstand high pressure resistance except).
When the measured insulation resistance is higher than 4.8 One * Ten 10, should be measured in the shielding box, box shell grounding, to prevent interference.
In the 4.9 test resistivity larger material, due to easy material should be used in high voltage test polarization. The volume resistance and surface resistance measurements, should first measure the volume resistance and surface resistance test, because the material is polarized and the influence of volume resistance. When the material is easy to produce continuous polarization measurements, will make the measurement work can not be carried out, then to stop testing of this material, on the net. 8h-10h After measuring or cleaning, drying, etc. in anhydrous alcohol, cooling after measurement. On the same piece of specimen with different test voltage measurement, resistance test voltage selection generally the higher the measured value is low.
The instrument display range is 4.10 0.200~1.999 If the value is less than the display instrument, Zero point two zero zero When should a lower resistance range selection switch. If the instrument shows the value One point nine nine nine When should the resistance range switch a rise. Turn on the display until the instrument was in 0.200~1.999 Between。
4.11 test, high voltage output end of the body can not touch the instruments and their connections, to prevent the high risk of electric shock. At the same time also can not touch the high-voltage side, to avoid the high voltage short circuit.
In the following 4.12 to avoid the use of the environment:
A avoid placement of direct sunlight, rain and moisture.
B please away from fire and heat, to prevent the high temperature of the machine.
C handling or maintenance, should be shut down and the power line and test line down.
PC40B type digital insulation resistance tester (high resistance) use and operation
5.1 test wiring diagram
Insulation resistance measurement of 5.1.1 electrical products and various components (such as to measure more than Ten The 10 resistor, should be measured in order to avoid interference shielding, and affect the normal test), wiring.
5.1.2 with the 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 The high voltage electrode) (3) Protect the electrode ( Four Test sample)
The provisions and surface resistivity test method "in production, its main dimensions are as follows:
The measuring electrode diameter D1=5cm
The protection of electrode diameter D2=5.4cm
The protection gap between the electrode and the measuring electrode G=0.2cm
5.1.3 and 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.
5.2 test preparation
The 5.2.1 switch position selection
A "power switch" in the "off" position.
B rated voltage selection switch voltage in need (generally rated voltage 100V ).
C "mode" switch to "discharge" position.
D "resistance range selection" switch:
(1) when the measured value is known, then select the corresponding file.
(2) when the measured resistance is unknown, then select Ten 6 file.
E timing setting switch is in the "off" position.
5.2.2 connect the power switch on the power switch, the power indicator light. Preheat 10min .
5.3 testing steps
5.3.1 pure resistance test:
"Select" switch to "test" can be used as position readings; timer, timer switch can be set in the "on" position, when the set time is reached, the display value can be automatically locked. In the next test, the timing setting switch is in the "off" position.
(1) if found to display Zero point two zero zero The following, can be "resistance range selection" to "reduce a switch, if the resistance range selection switch Ten 6 ohm, the display value is still Zero point two zero zero Following that, the measured resistance is less than 200K In the minimum amount of Omega, the outer limit of instrument. Should be immediately "mode selection" switch to "discharge" position, and stop testing, so as not to damage the instrument. As for the display 1.999, The "resistance range selection switch by grade increased, until the reading in 0.200~1.999 Between。
(2) in the test of insulation resistance, such as the discovery of the display value there is a rising phenomenon, this phenomenon is due to the absorption caused by medium,
If for a long time is not stable, in general is to take the test after the start 1min When reading, as the measured value of insulation resistance.
5.3.2 measured with capacitance measured object:
The "choice" switch to "charge" file, charging for the object to be measured by a certain time after (as measured object size and decide, general 15s And when the capacitance or resistance value, may be appropriate to extend the charging time). And then press the 5.3.1 Step.
5.3.3 instrument readings (in ohms) multiplied by the "resistance range selection switch is indicated by the ratio, namely the measured value of insulation resistance. For example: Reading One point two zero three , "resistance range selection" switch coefficient Ten 11, the measured resistance value is One point two zero three * Ten 11.
The 5.3.4 test is completed, the "choice" switch to "discharge" position after the party detachable analyte, such as the capacitance of the analyte is larger (about Zero point zero one Mu F The above) 1min About the discharge, then can remove the analyte.
5.3.5 instrument after use, should cut off the power supply, and will restore the switch on the panel to test the position before. To remove all the wiring and equipment placed in custody.
6PC40B type digital insulation resistance tester (high resistance) common faults and Solutions
6.1 turn on the power supply and the power indicator light does not shine, please check back on the power fuse is damaged, such as fuse open circuit, replace the same fuse.
6.2 power supply is switched on, the display shows the value for resistance One point nine nine nine And, at a fixed time, please check whether the switch is set in the "open" position, the timing dial is set 00 If yes, please, the timing setting switch in the "off".
6.3 when measuring non high voltage output, first check the triode Q4 Is in good condition, if damaged please change, such as Q4 Well, check T1 Cruising is intact, with a multimeter resistance profile check coil Four With the feet Six Between the feet should be One Omega ~3 Ohm, coil One With the feet Three Between the feet should be One hundred and fifty Omega ~200 Ohm, if not, please change.
6.4 timer, time is not locked, please check the timing setting switch is in good condition, such as in good condition, please check IC1 Is intact, if not please change.
6.5 test time digital tube socket is not bright, please check whether the digital tube behind the loosening, if not loose or fall off check IC1 If damaged, replace if damaged.
7PC40B type digital insulation resistance tester (high resistance) test method
7.1 voltage check
The instrument "high output" and "ground" to end Seven Connected with the electrostatic voltmeter, respectively readout instrument in rated voltage (V For Xi) 100V , 250V , 500V and 1000V When the corresponding voltage electrostatic voltmeter (Vsi) , and press type calculation error should be consistent with the table One Test voltage error.
7.2 resistance check
The instrument of the "high output" and "input" end to end Eight 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.
8 complete
PC40B type digital insulation resistance testing instrument
A power line
The test line (with a crocodile clip)
Use a manual
A certificate
9 options
The electrode box (including a special test line)
10 other
10.1 the instrument should be to keep the temperature in the room Zero C ~ Forty C, relative humidity of not more than 80% In the air, and not enough to contain harmful substances caused by corrosion.
10.2 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 is not working properly, then the manufacturer should be responsible for free to replace or repair.
10.3 manufacturing plants have the right to make changes to the instrument, without notice.