PC39A type digital ground resistance tester overview
This product is suitable for measuring the resistance between all kinds of motor, electrical appliances, instruments, household appliances and other equipment to protect the ground and can reach the value of the metal shell. It has the advantages of accurate measurement, convenient operation etc.. accord with GB4706.1 "Test safety of household and similar electrical appliances - General requirements" and other relevant national standards in terms of the requirements of the test equipment needed. PC39A Also in line with national standards GB9706.1 "General requirements for safety of medical electrical equipment". This instrument is carried out Q/TPGG1PC39 The enterprise series digital tester standard.
PC39A type digital ground resistance tester specification and technical characteristics
2.1 conditions of use
temperature Zero C ~ Forty C
The relative humidity is less than or equal to Eighty %
AC power supply 220V Tolerance. Ten %, 50Hz
No strong electromagnetic interference source, without a lot of dust and corrosive gas, good ventilation.
2.2 product features
A automatic compensation of line resistance and contact resistance test fixture.
The measured value of B automatic range conversion.
C has over-current and under flow indication and protection function. ( PC39A )
25A or 10A Constant current. ( PC39 )
D memory test conditions.
E measured value exceeds the alarm value, the instrument has sound and light alarm function.
F can be single or continuous test, suitable for the production line.
G front panel type correction software.
H can be equipped with computer communication interface.
Optional I control interface.
2.3 models and technical parameters.
2.3.1 specifications
Model： PC39A Grounding resistance meter
Measuring range: 0~200m Omega (25A ), error: + ( 3% Reading +0.3m Omega)
Measuring range: 0~500m (omega 10A ) , Error: + ( 3% Reading +3m Omega)
Cover PC39 (0~120m Omega ) Model
2.3.2 technical parameters
25 ~ 35.0--------20.0~120.0
3 ~ 25.0---------20.0~150.0
10 ~ 25.020.0 ~ 150 (25A) 20.0~200.0
4 ~ Ten point zero two zero ~ 500 (10A) 20.0~500.0
The basic error ( Three % R + 3D )
A constant current: Ten , 254.0~35.0
The basic error. Five % R (. Three % R + 3D )
Test voltage (AC) V Less than or equal to Twelve Less than or equal to Six
0.11.0~199.920.0~500.0
1200~500-------- test time S
0~99. 5%0~999
Size L * B * H , Mm : Three hundred and seventy * Two hundred and sixty * One hundred and seventy-seven thousand three hundred and seventy * Two hundred and sixty * One hundred and twenty-four
weight Kg129
PC39A type digital ground resistance tester structure and working principle
3.1 test principle
3.2 instrument function key layout
1 "the current" display window Two "Grounding" display window
3 "time" display window Four The "measure" indicator
5 "qualified" indicator Six "Compensation" status indicator
7 "flow" status indicator Eight Alarm indicator
9 "less flow" status indicator Ten The current adjustment knob
11 "reset" button Twelve "Delta" button (increase)
13 "at" key (reduce) Fourteen The "start" button
15 "set" button Sixteen Measuring end
17 "power switch"
18 communication interface Nineteen "The wire" interface
20 nameplate Twenty-one The power socket (fuse)
22 cooling vents Twenty-three Ground terminal
24, fuse seat Twenty-five The power socket (without fuse)
Note the PC39A type digital ground resistance tester safety
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 test instruments must be well grounded.
The operation procedures 4.4 operating personnel must be familiar with the tester can be used.
4.5 in the whole measurement process, can adjust the other button.
4.6 after the test, to reset the State Party, detachable connection.
4.7 in order to keep the cooling effect of the instrument itself and normal operation, do not use a slit or vent blockage.
In the following 4.8 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 high temperature instrument;
C handling or maintenance, should be shut down and will remove the power line.
PC39A type digital ground resistance tester to use and operation
5.1 of the initial state
Connect the instrument power supply, open the power supply switch, instrument current, grounding resistance, time display window display is 0, then the instrument is in the initial state, and preheating 5min .
5.2 function keys and settings
5.2.1 alarm grounding resistance value set
Click the "set" button, the display window shows the current" A--- "The grounding resistance of display window to display a set of the grounding resistance of the alarm value, according to the" delta "button (increase) or" at "key (decrease) to get the required alarm grounding resistance and then click" setup "button to save the grounding resistance value at the same time to enter the alarm time set.
5.2.2 time setting
When the grounding resistance alarm value is stored at the same time, the current display window display" T--- "The grounding resistance test time display window to display a set of press button" delta "or" at "button to get the required test time, and then click" Settings "button, which save time setting value at the same time to enter the test resistor compensation value set.
5.2.3 test resistance compensation value setting
When the preset value is saved at the same time, the current display window display" P.--- "Resistance display test resistance compensation value window displays the last, then according to the" delta "key or" at "button to get the required compensation value, and then click" Settings "button, which save the test resistance compensation value at the same time to enter the PC39A Enter the open set alarm function. The instrument in the initial state, the clamp special butt joint measuring line, and then press the "start" button. If PC39A To the current adjustment knob, the test current reaches the specified value. If PC39 The test set will automatically enter the current value (Heng Liu). And then read the display window showing the value of grounding resistance, is testing resistance compensation value. At the time, it is set to test resistance value can be compensated.
5.2.4 open set alarm function
When the test instrument of the resistance compensation value is stored at the same time, the current display window display" H--- "Resistance, open circuit display window to display the alarm function" ON "(the alarm) or" OFF "(cancel alarm). Press the button "delta" or "at" key to turn switch, come to a desired state, then click the "set" button, the instrument to measure the initial state.
5.3 steps
5.3.1 complete set, the instrument is in the initial state.
5.3.2 correct connection. A pair of (the two group) test line, coarse and fine measuring rod are respectively inserted into the end of the red line group tester" A "," A "End (thick line of measurement" A "On the line" A "); coarse and fine measuring rod group end are respectively inserted into the black line measuring instrument" B "," B "End (thick line of measurement" B "On the line" B "), clamp measurement on the other end of the line are respectively connected with the metal shell of the tested equipment protection can be touched and the ground terminal.
5.3.3 test procedure
5.3.3.1 single test
Click "start" button, "measuring" indicator light. Control panel on the "current regulation" knob to the required test current value. This time window displays the remaining time of test. If the analyte is qualified, test time, the instrument will issue a "beep" sound, and a "qualified" indicator light, display window resistance of the measured object is the value of grounding resistance; when the measured resistance value is greater than the alarm settings, alarm indicator lights, the test time is up the instrument, stop working, and sound alarm, then sentenced the analyte to nonconforming product. Click the "reset" button, the instrument measuring the exit state, return to the initial state, the "measure" indicator.
5.3.2 continuous test
When the time display window display" Zero ", click" start "button, can continuously tested, do not have to press the" start "button. For the real-time display of measurement results to determine value.
5.4 during the test, when the measurement of the grounding resistance exceeding the measurement range, the grounding resistance of the display window display "--",
If there is no current on the measured object, that does not constitute a loop, the grounding resistance value is infinite, the instrument display "--".
5.5 during the test, when the test current is less than 1A When the "undercurrent" indicator light, when the test current is greater than 37A When the instrument automatically cut off the current, stop testing, and "flow" indicator light, grounding resistance display window display "--".
6 wire interface pin definition
A "qualified", "alarm" output contact signal (control), effective closure.
B output contacts can bear 24V/0.2A Power Supply。
C "start" and "reset" as the input pulse signal contacts (controlled). among Two As a common foot.
7 common faults and exclusion method
7.1 after the start of the power indicator light and display are not bright.
Bad a power socket inside the fuse and the elastic contact * *. Replace the fuse or fuse holder.
B power transformer AC9V To the motherboard socket loose. Replace the plug tight.
C test Seven thousand eight hundred and five The output should be 5V If there is no voltage, the voltage is too low or check the electrolytic capacitor and three terminal regulator rectifier tube, related.
7.2 no current.
The a test line and big alligator clip weld sealing off, bad contact or line break test, and" A "," A "," B "," B "Socket loosening or breakage, which connect with the socket socket screws not tightened.
B "measurement" switch is damaged, replace the switch.
C SCR board (board) relay HG4130 Damage, change element.
7.3 boot "current" lights. The current adjustment knob back to zero, and then press the "reset" button.
7.4 if due to serious interference or improper operation of the "start", "reset" button, press the power switch, turn off the power, reboot, the instrument can work normally.
7.5 if the above fault still cannot be excluded or other fault, please contact with the company.
7.6 measurement error, please check the compensation value is set correctly.
8 calibration
8.1 equipment required
0.5 level AC current meter, 100W The standard resistance ( One %)
The calibration of 8.2 test current
The instrument in the test mode, observation instrument (current value Ix ) and display current alternating current on the table ( Is ), calculated the relative error should be consistent with the table One In the current basic error test.
The calibration of 8.3 grounding resistance
Grounding resistance instrument wiring in the test mode, the observation instrument displays the grounding resistance value ( Rx ) and the standard resistance standard value ( Rs ), calculated the relative error of grounding resistance shall comply with the basic requirements (measuring range error).
9 maintenance and maintenance
9.1 the instrument need regular maintenance and maintenance, can prolong life.
9.2 cleaning and maintenance of equipment, be sure to turn off the power switch.
9.3 instruments, test line and power line terminal, if damaged, please replace the same size in parts.
10 complete
PC39A or PC39 Digital ground resistance test instrument
A special measuring line
A power line
Use a manual
A copy of the product certificate
11 other
11.1 products should keep the temperature in the room Zero C ~ Forty C, relative humidity of not more than Eighty %, and in the air does not contain harmful substances to cause corrosion.
11.2 strong shock tester in use, handling, storage should be avoided.
11.3 instrument and accessories from the factory delivery date Twelve Within a month, when the user is in full compliance with the use of the rules specified in the specifications, and the original factory seal intact condition, found that the tester can't normal use, then the manufacturer should be responsible for free to replace or repair.
11.4 manufacturing plants have the right to make changes without notice to the tester.
PC39 communication protocol:
baud rate 4800BPS
When the host computer to send instrument (#07H) After the instrument is sent to the host computer for continuous measurements ( ASCII Code)
No. One Byte: (bit synchronization Reserved )
No. Two Byte: ignore
No. 3--5 Byte: current value
No. 6--9 Byte: grounding resistance measurement
No. Ten byte : The decimal point position
No. Eleven Byte: alarm bit
PC39A communication protocol
A hardware interface
232 interface: DB9 Pin definition
2 feet. 232_TX
3 feet. 232_RX
5 feet. 232_GND
485 interface: DB9 Pin definition
2 feet. 485_A
3 feet. 485_B
Two communication protocol
The baud rate is 1 Nine thousand and six hundred
2 start: send Ascll Code " J ".
3: read data sent Ascll Code " L ".
4 reset: Ascll The 'send' code K ".
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 voltage 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.