Single-phase full-automatic kwh meter test bench

CONTENT

A.Introduction

B.Technical specification

C.Working principle

D.Key function

E.Keyboard Set

F.Test Power Meter

G.Setup Online

H.Trouble shooting

★This manual is for reference only, any modification will not be notified individually. Please use the manual that comes with the equipment.

PTC-8125D single phase energy auto-calibration system is a new generation, high precision, energy meter calibration equipment. It uses the international’s most advanced technology and components available in 90 decade . The equipment works under the control of keyboard or remote computer.

1. Accuracy class: 0.1/0.2/0.3%

2. Standard equipment:

Standard energy meter accuracy class: 0.1/0.2/0.3%

StandardCTaccuracy class: 0.01/0.02/0.05%

3. Output range:

Output voltage:0~220V

Output current:0~100A

4. Adjustable range:

Voltage:0-120%

Current:0-120%

Phase (Voltage/current): 0-360.0∘Fine adjustment: 0.1°

Frequency: 45-65HzFine adjustment: 0.1Hz

5. PowerStability: ≦0.1%/3 minutePF=1.0L

6. Waveform distortion coefficient: ≦1.0%

7. Indicator :31/2digitto showtheerror

8. CommunicationInterface :RS232/485

9. Number of meters calibrated : 24(or depend on user’s request)

10. The maximum power consumption :1200VA

11. Input Power : 220V(1±10%)

12. Working Environment :

Temperature20±5℃

Relative Humidity≤85%

C .1 Working principle frame

C .2 Working principle

a. When the CPU receives orders from the operating keyboard or computer , it will control the digital signal source and range switch to work .

b. Digital signal source

Signal source uses the most advanced technology of digital frequency modulation, amplitude modulation and phase modulation to synthesize a sine wave. These waves will be the input signal source for single phase voltage and single phase current. These signal source will be amplified by the power amplifiers .

C.3 Power amplifier

Power amplifier uses the most advanced integrate power operation amplifier. It has designed a perfect protection system for overloading voltage short circuit and overloading current open circuit. It has speedy limit current protection system and keeps the power amplifier in steady working.

D.1 Turn on the equipment

Press on the “Power “ switch, the keyboard monitor screen displays main menu PTC-81252.0 or LINE PTC-8125 2.0 . The number “2.0” is the version of CPU software. If the display is wrong, please push the “Rst.” button.

D.2 Measuring value display

When the equipment is working, the keyboard monitor screen displays the measuring value of frequency, voltage, current, phase.

Frequency (Hz)Voltage (%)Current (%)Phase (φ)

ForExample:

(1): If the display value of voltage is 100.0,then the real output voltage is:

220100.0%=220(V)

(2): If the current range is 5A and the display value of current is 100.0 ,then

the real output current is:

5×100.0%=5(A)

If the current range is 10A and the display value of current is 80.0 ,then

the real output current is:

10×80.0%=8(A)

D.3 Operating Panel

RSt. :It’s makes the signal source initializing.

Setup : Set coefficient of system measuring value, choose the type of the equipment , set parameters of standard energy meter, set starting current, set mark tracing ,set calibration scheme, and so on.

ESC. : clear the setting value(at the time of setting),reduce current and voltage(at the time of calibrating)

0~9. : Numeric Figures Key

.: Decimal Point Key

0.5L,0.8L,1.0L,0.8C,0.5L. :Power Factor Key

5%~600%. :Load Range Key

E .1 Setup

Press on the“Setup” key on the main menu, the monitor screen displays following menu: :

Please input the password:8125(or 8100) . If the password is 8125 , you can set standard energy meter parameters, choose the type of equipment, set starting current, set mark tracing and so on. If the password is 8100, you can set latent test, set starting test, set auto calibration scheme of basic error test.

E.1.1 Now input the password 8125 , then press the “Enter” key ,the screen displays following menu:

Please input the voltage value of standard energy meter, then press “↑”key or “↓” key to set other parameters. For example, press “↓”key ,the screen displays following menu:

Please input the current value of standard energy meter, then press “↓” key ,the screen displays following menu:

Please input the constant of standard energy meter, system will multiply the input value by 107(for example,ifthe constant is 1.8 ×107,the input value is 1.8). Then press “↓” key ,the screen displays following menu:

If the system has mark tracing function then input 1,else input 0. Then press “↓” key ,the screen displays following menu:

Please input the number of meters calibrated. If the equipment can calibrate 24 meters at the same time, the value is 24.Press “↓” key ,the screen displays following menu:

This parameter is used to adjust starting current, the range is from 0 to 9.9(mA). Press “↓” key ,the screen displays following menu:

This parameter is used to adjust the output voltage of power amplifier. For example, set Un=220V,but the real output voltage is 100.5%,we can set this value as 0.995,then the real output voltage will be 100%.Press “↓” key ,the screen displays following menu:

This parameter is used to adjust the output current of power amplifier. For example setIn=10A,but the real output current is 100.5%, we can set this value as 0.995,then the real output current will be 100%.Press “↓” key ,the screen displays following menu:

This parameter is used to adjust the output phase. For example, The value of power factor is 0.5L, the screen shows 58°,you can set this parameter as 2. If it shows 62°, you can set thisparameter as 358°. Press “↓” key ,the screen displays following menu:

This parameter is used to adjust the display of phase when the current range switched to 0.1A. Press “↓” key, the screen displays JQ1 to JQ9 in turn, these parameters are used to adjust the phases of 0.25A,0.5A,1A,2.5A,5A,10A,25A,100A.

E.1.2Now we input the password 8100. Press “Enter” key, the screen displays the following menu:

Please select one item by “↑” key or“↓” key. The selected itemwill be twinkling.

E.1.2.1Set latent test

When “QIAD” is twinkling ,press “Enter” key, the screen displays the following menu:

Please select latent voltage or latent timeby “↑” key or“↓” key.

Set the value by pressing numeric figures key or decimal point key

Press “Enter” key to confirm or press” Esc” key to return to previous menu.

E.1.2.2Setstarting test

When “QID” is twinkling ,press “Enter” key, the screen displays the following menu:

1)Please select starting current or startingtimeby “↑” key or“↓”key.

2)Set the value by pressing numeric figures key or decimal point key.

3)Press “Enter” key to confirm or press” Esc” key to return to previous menu.

E.1.2.3 Set automatic test

When “AUTO” is twinkling ,press “Enter” key, the screen displays the following menu:

Total records Current record Load burden ratePower factor

Press load range key and power factor key to set the status of current point.

Press “Para.” Key ,the screen displays following menu:

Total recordsCurrent recordError limit

1) Set the error limit of this point by pressing numeric figures key or decimal point key.

2) Press “Enter” key to confirm or press” Esc” key to return to previous menu..

Note: The count of total records is less then 20.

E.2 Parameters of tested meters setting

On main menu ,Press “Para.” Key the screen shows the following menu:

Please input the rated voltage of tested meters. Then press “↑”key or

“↓” key to set other parameters. For example, press “↓”key ,the screen displays following menu:

Please input the rated current of tested meters. Press “↓”key ,the screen displays following menu:

Please input the maximum current of tested meters. Press “↓”key ,the screen displays following menu:

Please input the constant of tested meters. Press “↓”key ,the screen displays following menu:

Please input the class of tested meters. Press “↓”key ,the screen displays following menu:

Please input the output frequency of digital signal source. Press “↓”

key ,the screen displays following menu:

This parameter sets the calibrating method of start test and latent test. Ifthe value is 1,the calibrating works by user’s definition, else the value is 0,the calibrating works by regulations. Press “↓”key ,the screen displays following menu:

This parameter is used to set the count of passed error at every testing point when system is auto calibrating .

E.3 SetupRound

Onthe main menu,press“ADJ/TS” to display following menu:

Press numeric figures keyto setup the”N0”.“N0” isbasicround.

Press “↓” keyto display following menu:

Press numeric figures keyto setup the “N1”.“N1” isleastround.Testedround ismore than the “N1”.

Press”↓” keyto display following menu:

Press numeric figures key to setup the “N2”.“N2” ismaximalround.

Testedround. isless than the “N2”.

When you test power meter, testedroundis basic round(N0) multipliedby Load burden rate .For example, basic round(N0) is 5(n=5), Load burden rate is 200% , thentested round =10(5*200%).

F.1 basic error calibration

Aftersetupisfinished,then you cantestpowermeter

press “start” keytooutputvoltage and current

pressLoad burden ratekeyorpower factorkeyto change test point

During testing power meter, signal source communicatewith”8000”by RS485

Duringtestingpower meter,press “ADJ/TS” keytoselect voltage(current , phase).

Press “△” to speedy increaseoutputofvoltage (current , phase angle).

Press “▽” to speedy decreaseoutputofvoltage (current , phase angle).

Press “∧” to slowly increaseoutputofvoltage (current , phase angle).

Press “∨” to slowly decreaseoutputofvoltage (current , phase angle ).

Fine adjustment 0f speedy increase (speedy decrease)is 1% ofvoltage (current ), or.1 degree of phase angle

Fine adjustment 0f slowly increase (slowly decrease)is 0.1% of voltage (current ), or.0.1 degree of phase angle

F.2 AutomaticCalibration

According to tested point defined by user, signal source calibrates powermeter automatically. If testederrordoes notpass, signal sourcewill go ontesting at this point, until testederrorpasses. Press “ENTER” to skip to nexttestedpoint. Press “ESC” to exittest.Automaticcalibration is end, display following menu:

F.3 Startingtest

After parameter of starting test setting finished, on the main menu, press “ST-Test” to dostartingtest.IfBJ ( parameter ofsearch mark)issetto1, system first searches markfor starting test.Starting test display following menu :

Frequency(hz)voltage(%)current(%)Starting Test time

Left(min)

F.4 Latent Test

AfterLatentparametersetting finished, on the main , press “M-Test” to doLatenttest.IfBJ ( parameter ofsearch mark)issetto1, system first searches markfor Latent test.Latent test display is same asstarting test :

DuringLatent test( starting test),ptc-8000displaysfollowingstatuses

1)beginning to search mark (search mark)ptc-8000 display “1111”

2)found markptc-8000 display “2222”

3)beginning to start test (latent test)ptc-8000 display “3333”

doing start test (latent test)ptc-8000 display “3333”

4)found mark during start test (latent test)ptc-8000 display “4444”

5)exitstart test (latent test)ptc-8000 display “5555”

F.5protectionsystem

To ensure full reliability ,PTC-8125D is designedwith a perfect protection system. When the voltage circuit is short oroverloaded , or the current is open, it willautomatically lower down the output even to zero anddisplay “ERR” ,It is recommended to lower down the output power, check the wire connect, then restore the power output if everything is normal.

Ifyou want PC to test power meter ,you push switch from one to the other on the main .The keyboard is lock on line. Signal source is only respondedto PC .

1) When the voltage circuit is short or overloaded , or the current is open, itwill automatically lower down the output even to zero anddisplay “ERR” ,It is recommended to lower down the output power, check the wire connect, then restore the power output if everything is normal.

2) Error test is abnormal

check whether the preset parameter for the meter calibrated and the standard meter are correct.Check whether the infrared collector works correctly

3) PTC-8000 doesn’t work correctly

if PTC-8000 doesn’t work correctly , it can be restored by pushing the button of “system reset” . In the process of calibrating the meter, push the button of “calibration reset” to re-calibrate.

4). please contact us if there is any occurrence of malfunction of the equipment.

Warning!!!

There are high voltage at Output and input of the power ample boxes . It is dangerous to touch by hand . It is forbidden to open power ample boxes by nonprofessional .