PC40A type digital insulation resistance tester overview
PC40A type digital insulation resistance tester (hereinafter referred to as instrument) is suitable for measuring the insulation resistance of motor, electrical appliances, instruments, transformers, cables, telecommunication components, household electrical appliances, electrical equipment etc.. The instrument has the advantages of convenient use, flexible operation, is in line with national standards GB4706.1 "Test safety of household and similar electrical appliances - General requirements" and other standards in the relevant provisions of the requirements of the test equipment needed. This instrument is carried out Q/TPGG4PC40A Digital insulation resistance tester standard enterprise.
Resistance Tester Specification and technical characteristics of PC40A type digital insulation
2.1 specifications and main technical parameters.
The measuring range of rated voltage minimum resolution
The basic error of M. V error M Omega
0.2~199.9. (3%r+2d)
500/1000. 5%0.001
200~1999. (3%r+4d)
2.2 product features
A adopts single chip microcomputer control.
B three and a half digital display instrument.
C measurements can be automatic or fixed range test.
D memory test conditions.
E chip with high anti-interference, good reliability.
F can be single or continuous test, suitable for the production line.
G with a remote control interface.
H computer communication interface (optional RS232/RS485 ).
2.3 conditions of use
temperature Zero C -40 C
The relative humidity is not more than 80%
Power supply AC220V (tolerance. 10% ), 50Hz
No strong electromagnetic interference source, without a lot of dust and corrosive gas, good ventilation.
2.4 test time (1s~99s Resolution 1s)
When set to" Zero "When, for continuous measurement.
2.5 sampling time 0.4s .
2.6 dimensions L * B * H, mm : Three hundred and eighty * Three hundred and thirty * One hundred and forty-five .
Power consumption is about 2.7 20W .
2.8 weight 5kg .
3 structure and measuring principle
3.1 measuring principle
3.2 instrument function key layout
1 "start" button Two The "reset" button
3 "insulation resistance" display window Four "Time" display window
5 measurement indicator Six "Qualified" indicator
7 "set" indicator Eight " 500V "Light
9" L "Measuring end Ten " E "Measuring end
11" G "End shield Twelve " 1000V "Light
13 alarm indicator Fourteen "Select" key (decimal point selection)
15 "a" key (increase) Sixteen "At" key (reduce)
17 "set" button Eighteen "Voltage" button (rated voltage selection)
19 "power switch"
1 communication interface ( RS232/RS485 ) Two "Control" interface
PC40A type digital insulation resistance tester nameplate Four The power socket (fuse)
PC40A type digital insulation 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 measurement of serious jumping phenomenon, the apparatus end shield" G "Connected.
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 during the test, do not press the reset (in addition to RESET Any key button outside).
4.9 measuring end long time short circuit should not exceed 300s .
PC40A type digital insulation resistance tester use and operation
5.1 of the initial state
Connect the instrument power supply, open the "power" switch, the display window shows the value of insulation resistance" One thousand nine hundred and ninety-nine "Display window showing the value of time" 00 The instrument is in the initial state. ".
5.2 function set
Click the "set" button, "set" indicator light, insulation resistance display window display alarm set on a resistance value of the instrument, enter the set state.
5.2.1 alarm resistance value set
When the instrument is set by the state, according to the "delta" button, "del" button and the "select" button, the display window shows the value of insulation resistance to the desired alarm resistance value, and then click "Settings" button, the preservation of resistance value at the same time to enter the alarm time setting.
5.2.2 time setting
When the alarm value is saved at the same time, the time display window to display the last set test time, and then through the "delta" key or "connected" button, the time display window shows the value to the required time settings, and then click "Settings" button, enter that value at the same time Cheng Xuanze saved test time.
5.2.3 range selection
When the preset value is saved at the same time, the insulation resistance of the display window display" Auto "Through the" delta "key or" at "button switches the five states, to get the required range, and then click" Settings "button, the preservation of the selected range at the same time to enter the baud rate setting.
" Auto "Said automatic range selection : 0-1999M Omega , Minimum resolution 0.001M Omega;
" Two "Said the choice of fixed range: 0-1.999M Omega , Resolution 0.001M Omega;
" Twenty "Said the choice of fixed range: 2-19.99M Omega , Resolution 0.01M Omega;
" Two hundred "Said the choice of fixed range: 20-199.9M Omega , Resolution 0.1M Omega;
" Two thousand "Said the choice of fixed range: 200-1999M Omega , Resolution 1M Omega.
5.2.4 baud rate setting
When choosing the range is kept at the same time, the insulation resistance of display window to display a set baud rate, time display window display" BP "Then the" delta "button or" del "button, to get the desired baud rate (which can be switched" 1200/2400/4800/9600bps Four), file and press the "set" button to save the setting of the baud rate, and complete set, exit the setting, the instrument back to the initial state. If only one of the above settings, press the "set" button to the corresponding display window corresponding to the symbol or value, after the subsequent steps with the method of operation.
Selection of the rated voltage of 5.3
When the instrument is in the initial state, press the "voltage" button, such as the election 500V File is" 500V "Such as the selection of indicator light; 1000V File is" 1000V "Light.
5.4 testing steps
5.4.1 after completing the above steps, the instrument back to the initial state.
5.4.2 according to the measured object, according to the 5.4.3 Correct connection request corresponding graph. Then press the "start" button, "measuring" indicator light, the insulation resistance of display window to display the measured value, the time display window to display the remaining time test. The test time, the "measure" indicator. If the analyte is qualified, the insulation resistance value is the display window to display the measured value of insulation resistance, the insulation resistance value is locked; if the measured value is less than the set alarm value of resistance, the instrument alarm to the analyte is unqualified. After the test, please click the "reset" button.
A in the determination of insulation, both ends of the measured object respectively and instrument measuring end" E "And" L ".
B on the ground of analyte determination of insulation, the measured object and measuring instrument grounding end end" E "While the other end is connected with the measuring end" L ".
C in cable core insulation shell on the determination of cable, the cable and cable core shell respectively and instrument measuring end" L "And" E Connected, then the inner shell core insulation between the cable and instrument end shield" G "Is to eliminate the measurement error caused by surface leakage.
When the 5.4.4 after the end of the measurement, if the insulation resistance value in the window display flicker:
A if the range selection in a fixed range, the measured value beyond the selected range, please re select the appropriate range.
If the B range selection in automatic range, the insulation resistance of the measured value range of the instrument has been exceeded (more than 1999M Omega).
5.5 pinout control interface
start-up COM Pass alarm reset
1. qualified and alarm output contact signal for the qualified the foot closed, the alarm for the foot closed.
2. contacts can bear two 24V/0.2A The power supply.
In 3., the short circuit to start ( 0.5s ); the second and the third (for short circuit reset 0.5s )
5.6RS232 communication format agreed as follows
The baud rate is 5.6.1 1200/2400/4800/9600bps Can choose the frame format for the start bit +8 Bit data + Stop bit.
The 5.6.2RS232 pin definition interface: 2 (TXD) 3 (RXD) 7 (GND) .
The 5.6.3 instrument received any character from the serial port, serial port to send out the instrument from four bytes:
The first byte is the low measurement data Eight position (DL)
Second bytes for the measurement data of high Eight position (DH)
Third bytes for the decimal point position measurement data (N)
Fourth bytes for the measurement results of the discriminant
6 common faults and Solutions
Please read the instructions carefully before use, if a fault occurs, please carry out the maintenance according to the following example. If you still cannot solve please contact the manufacturer.
7 calibration
7.1 test equipment
Digital voltage meter, ZX114A Resistance box
7.2 rated voltage calibration
According to the chart Ten Wiring, the instrument (rated voltage Vb ) were placed in the" 500V "The files or" 1000V "The files, and then press the" test "button to be numerically stable, high voltage meter display value of digital readout ( Va ), and press the relative error of calculation shall be in accordance with the table One The error in the rated voltage.
The 7.3 insulation resistance value calibration
Wiring, instrument rated voltage respectively. 500V and 1000V When adjusting the resistance (standard resistance box Rs At the same time, the insulation resistance instrument) read the display window showing the value ( Rx ), and press the relative error of calculation shall conform to no reaction, no display panel buttons replaced on the main control panel circuit U9 Table One The insulation resistance of the basic error.
8 maintenance
8.1 the instrument need regular maintenance and maintenance, can prolong life.
8.2 cleaning and maintenance of equipment, be sure to turn off the power switch.
8.3 instruments, power line test line and terminal if damaged, please replace the same size in parts.
9 complete sets of equipment
PC40A type digital insulation resistance testing instrument
A power line
A pair of test bar
A control interface plug
Use a manual
A certificate
10 other
10.1 products should be kept indoors, the ambient temperature is Zero C ~40 C, relative humidity of not more than Eighty %, and in the air does not contain harmful substances to cause corrosion.
10.2 instruments from the user purchase date Twelve Within a month, when the user fully comply with the use prescribed in the use of rules and the original factory seal complete conditions, 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.