Detailed Product Description

photoelectric phenomenon device

MAIN TECHNICAL REFERENCE

4 PIECES OF LIGHT ACCEPTABLE COMPONENT, VACUUM PHOTOELETRIC CELL

FILTER, 4 KINDS WITH DIFFERENT WAVE LENTH (RED, GREEN, BLUE, YELLOW)

LED POWER, WITH WAVE LENTH SAME AS FILTER

MAGNIFIER, CURRENT MAGNIFIER, INCREASING 60DB

LAMP-HOUSE, 220V 20W HALOGEN LAMP

POWER, 220V+-10%,50HZ

CONSTRUCTURE

THE INSTRUMENT IS CONSISTED OF ADJUSTABLE POWER, LIGHT RECEIVE-MAGNIFIER-PHOTOCURRENT DISPLAY, FILTER GROUP AND LED GROUP ETC. THE POWER AND THE LIGHT RECEIVE DEVICE ARE CONNECTED BY A PATH, THE DISTANCE IS ADJUSTABLE ACCORDING TO EXPERIMENT

SURFACE BOARD AS BELOW

1.       DIGITAL METER, TO MEASURE ACCELERATED VOLTAGE AND PHOTOCURRENT

2.       VOLTAGE/CURRENT SWITCH, TO CHOOSE TO MEASURE ACCELERATED VOLTAGE AND PHOTOCURRENT

3.       CURRENT MAG KNOB, CHOOSE THE MAG RATE. X1 TO MEASURE THE PHOTOCURRENT 10^-6 , X0.1 TO MEASURE PHOTOCURRENT 10^-7 , 0.01, 0.001 CORRESPONDINGLY TO 10^-8 AND 10^-9

4.       ACCELERATED VOLTAGE ADJUSTING KNOB TO MEASURE ACCELERATED VOLTAGE

5.       INDICATING LIGHT TO INDICATE POWER ON

6.       VOLTAGE BUTTON, CONTROL THE DIRECTION OF ACCELERATED VOLTAGE. TURN THE BUTTON TO -, MEANS NEGATIVE VOLTAGE, AT THIS TIME , THE ACCELERATED VOLTAGE WITH A FUNCTION HOLDING THE PHOTOCURRENT BACK. + MEANS POSITIVE, WITH FUNCTION INCREASE THE PHOTOCURRENT. THE OUTPUT ACCELERATED VOLTAGE IS ADJUSTABLE WITHIN THE RANGE +-15V

7.       LED SOCKET. THE LED DEVICE WILL SHINE WHEN CONNECT TO POWER

8.       `LAMB-HOUSE ADJUSTING BUTTON, CAN TURN ON/OFF AND ADJUST THE LIGHT INTENSITY

INSTALL AND DEBUG

WELL PLACE THE INSTRUMENT, CONNCETED THE POWER WIRE, TURN ON THE POWER, SO THE INDICATOR SHINE AND THE DIGITAL METER. THE DISPLAY SHOW STABILIZED VOLTAGE RANGE 15V TO +15V, WITH NEGATIVE FIGURE WHEN THE POLARITY SWITCH TURN TO -. TURN ON THE POWER AFTER THE ABOVE CHECKING, ADJUST THE KNOB , PUT ON THE FILTER, CHOOSE THE MAG RANGE, ADJUST THE ACCELERATED VOLTAGE KNOB AND VOLTAGE DIREDCTION , SO YOU CAN READ THE ACCELERATED VOLTAGE VALUE AND CORRESPONDINGLY PHOTOCURRENT VALUE

SO FINISH CHECKING, TURN OFF THE POWER

STEP

1.       TURN ON THE POWER, WARM UP FOR 10 MINUTES THEN TURN THE CURRENT MAG KNOBTO THE RANGE X1

2.       PUT THE RED FILTER ON, TURN ON THE POWER ADJUSTING BUTTON AND ADJUST TO A SUITABLE POSITION

3.       TURN THE VOLTAGE TO THE DIREDTION +, CURRENT MAG TO A PROPER SCALE, ADJUST THE ACCELERATED VOLTAGE KNOB TO INCREASE THE PHOTOCURRENT TO SATURATION. AT THIS TIME , THE ACCELERATED VOLTAGE VALUE IS ABOUT 14V, IF CHANGE TO THE OTHER FILTER, THE SATURATED CURRENT VALUE WILL CHANGE

4.       RECORD THE ACCELERATED VOLTAGE VALUES BETWEEN 15V AND +15V AND THE CORRESPONDING CURRENT VALUE, SO WE CAN DRAW A AMPERE-VOLT CHARACTERISTIC CURVE DIAGRAM OF THE PHOTOELECTRI CELL AT THIS INPUT LIGHT FREQUENCY. WE CAN SEE THE SUTURATED PHOTOCURRENT AND STOPPED VOLTAGE ETC. THERE ARE 4 DIFFERENT CURVES WITH THE 4 DIFFERENT INPUT LIGHT FREQUENCY

5.       WE CAN WARD OFF THE HOLE FOR LIGHT COMING WITH HAND, CAN SEE THE PHOTOCURRENT DISAPPEARS, MOVE AWAY THE HAND , IT APPEAR AGAIN AT ONCE, SHOW THAT THE PHOTOCURRENT OCCUR IN A SHORT TIME , USUALLY NO MORE THAN 10^-9 SECOND

6.       CHANGE THE DISTANCE L BETWEEN POWER AND THE PHOTOELECTRIC CELL, RECORD L AND THE CORRESPONDING PHOTOCURRENT I, PLOT A DIAGRAM I-1/L, WE CAN GET A STRAIGHT LINE, WHICH PROVE THAT I AND 1/L IS IN DIRECT RATIO TO FURTHER SHOW THAT PHOTOCURRENT AND THE LIGHT INTENSITY IS IN DIRECT RATIO

7.       INSERT THE RED FILTER, THE ACCELERATED VALUE IS ABOUT 0V. SWITCH THE MAG KNOB TO SCALE X0.001, TURN THE VOLTAGE DIRECTION TO -, ADJUST THE ACCELERATED VOLTAGE TO TURN THE THE PHOTOCURRENT TO ZERO, THE READING OF ACCELERATED VOLTAGE VALUE IS THE STOPPED VOLTAGE OF THIS COLOR WAVE, CHANGE THE FILTER TO GET REPECTIVE STOPPED V OF EACH COLOR

8.       WE CAN GET h FOLLOW THE ABOVE PRINCIPLE, USE LINEAR REGRESS EQUATION THROUGH A FUNCTION CALCULATOR WITH THE 4 GROUPS OF STOPPED VOLTAGE FIGURES

9.       TO ACHIEVE THE BEST WORKING SITUATION, WE CAN ADJUST THE LAMB-HOUSE TO RIGHT FACE THE MIDDLE OF THE LENS, KEEP THE POSITION AND MAKE THE MAXIMUM OF CURRENT THE AMPERE METER SHOW, AT THIS TIME, THE LIGHT IS BEST

MAINTAIN

1.       PLACE THE INSTRUMENT UNDER A DRY, VENTILATED, NON-CORROSIVE INDOOR WORKING CONDITION WITH TEMPERATURE BETWEEN 0-40 DEGREES. WHEN PLACE ON THE WORKING TABLE, PAY ATTENTION THAT THE LENS(PHOTOELECTRI CELL) DOENT FACE THE MOTLEY LIGHT (SUN LIGHT ETC.) DIRECTLY. INSERT THE BLACK LIGHT BLOCK RING FOR KEEPING IT LEST THAT THE PHOTOELECTRI CELL BE SHORTLIFE FROM THE LIGHT. PLS CHANGE THE PHOTOELECTRI CELL WHEN IT GET OLDER AND WITH LESS SENSITIVITY WHICH AFFECT THE TEST

2.       KEEP AWAY FROM THE DUST, WEt. CLEAN THE LAMB AND FILTER IF GET DUSTY WITH DEGREASE COTTON DIPPED WITH MIXTURE OF ALCOHOL AND AETHER

3.       AVOID THAT THE METER OVERLOAD DURING THE EXPERIMENT, YOU CAN CHOOSE A BIGGER SCALE WITH UNKNOWN CURRENT AND VOLTAGE

4.       REMEMBER TO CUT DOWN THE POWER AND PUT ON THE BLACK LIGHT BLOCK RING AFTER EXPERIMENT