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Brand: AELAB
Use for experiments: movement, rotation, colision, pendulum,...
This is time counter or timing counter.
Digital timer with photogates (Photogate timer) is a equipment for measuring time through photogates.
- Simple, neat, easy to use
- Display: Large LED 0.8inch,
- Unit: s, ms. Automatically switch the scale
- Resolution: 0.1ms
- Mode: Timer, Period, count. 6 modes are printed in top of box
- Input: 2 photogates and 1 electromagnet.
- Delay time compensation
Including: photogate timer, 2 photogates and holder.
Timer with photogate set: Including two photogate with rod
Photogate timer: large display
Photogate timer with instruction
Photogate timer rear: 1 jack for electromagnet and 2 jacks for photogates
This tiimer has 6 modes, capable of attaching 2 photogates and 1 electromagnet
Switch modes by pressing Mode button below:
(Photogate timer: Change Mode)
Suitable for instantaneous velocity measurement experiments.
Set up and operating:
(Photogate timer: Mode 1)
+ Timer display - -1- in 2s, then display time measured: 038.1ms: the time the object passes through photogate 1 is t1 = 38.1ms
+ Timer display - -2- in 2s, then display time measured: 045.5ms: the time the object passes through photogate 2 is t2 = 45.5ms
+ Value "045.5" paused for a longer time and then display datas "038.1", "045.5" again sequentially: That mean "045.5" is the last data measured by digital timer.
Suitable for average velocity measurement experiments.
Set up and operating:
(Photogate timer: Mode 2)
+ The Timer displays "1--2" for 2s and then displays the value: 697.6: it means that the time it takes for the object to go from photogate 1 to photogate 2 is t1-2 = 697.6ms.
Suitable for free-fall experiments, motion on an inclined plane, and evenly variable linear motion.
Set up and operating:
( Timer with Photogate: Mode 3)
+ The Timer displays "0--1" for 2s and then displays the value: 565.1: it means that the time it takes for the object to go from electromagnet to photogate 1 is t0-1 = 565.1ms.
+ The Timer displays "--1-" for 2s and then displays the value: 035.3: the time the object passes through photogate 1 is t1 = 35.3ms
+ The Timer displays "1--2" for 2s and then displays the value: 659.6: it means that the time it takes for the object to go from photogate 1 to photogate 2 is t1-2 = 659.6ms.
+ The Timer displays "--2-" for 2s and then displays the value: 037.2: the time the object passes through photogate 2 is t2 = 37.2ms
Suitable for oscillating measurements of simple pendulum, spring pendulum, rotating motion.
Set up and operating:
(Timer with Photogate: Mode 4)
+ The Timer displays "-0--" , then displays the value: 1.476: it is the first period of pendulum T0 = 1.476s.
+ The Timer displays "-1--" , then displays the value: 1.487: it is the second period of pendulum T1 = 1.487s.
+ The Timer displays "-2--" , then displays the value: 1.483: it is the third period of pendulum T2 = 1.483s.
+ The Timer displays "-3--" , then displays the value: 1.483: it is the fourth period of pendulum T3 = 1.483s.
.....................
+ The Timer displays "-9--" , then displays the value: 1.481: it is the first nineth of pendulum T9 = 1.481s.
+ The Timer displays "-A--" , then displays the value: 1.482: it is the average period of pendulum TA = 1.482s.
This is the average of the first 10 cycles of the pendulum. This value "1.482" will stop for a bit longer and then show cycles from 0 - 9 respectively
Suitable for counting experiments and calculating the average oscillation period of the pendulum.
Set up and operating:
(Timer with Photogate: Mode 5)
+ Press Start/Stop when count to 11.
+ Timer show: 11 period in 14.86s.
+ So average period: 1.486s
If the electromagnet has a large residual magnetic field, it will take a short time for the magnet to release the ball when the Start / Stop button is pressed.
This delay can be overcome by subtracting the time delay in the measured results. We carefully check the delay time and then switch the clock to mode 6 as in the clip below.
( Timer with Photogate: Daley compansation)
Press to mode 6, digital timer shows current time the timer is minus. According to the clip above, when you press to mode 6, the clock displays 000.9ms, which means that the t0-1 value in mode 3 has been subtracted 0.9ms.
If we want the value t0-1 to subtract 16.1ms, we press Start / Stop until the clock shows 016.1 then press Start / Stop again to stop.
When you press Start / Stop to show results, but the timer displays as shown picture below, the signal has not been collected. So please check:
+ The photogate is not plugged in or the plug is not tight or the plug is rusted.
+ The moving object has not been passed through the photogate eye: Adjust the moving object again
+ Broken photogate: Try by switch to Mode 5, then press Start / Stop, then move your finger to see if it counts. If not, replace another photogate.
Time counter : No signal received