PHYWE Timer 2-1 Operating Instructions page 3

The shading period of a light barrier that is connected either at
"Light Barrier 1" or at "Light Barrier 2" is measured and dis-
played. Two light barriers can also be simultaneously con-
nected. The shading time of the light barrier that is first inter-
rupted is then measured.
Measurement range: 0 to 9.999 s. Renewed measurement
possible, but only after first pressing the reset button.
5.3 Measurement of the time period between the start of
two shadings
— Turn rotary switch 6 to the "
— Press the reset button.
After the pressing of the reset button, the display shows three
decimal points which confirm readiness for measurement.
The time period between two shadings is measured and dis-
played. This operating mode is particularly suitable for track
experiments to determine the time that a car takes to travel
the distance between two light barriers.
Alternatively, the timer can be started by a signal at the "Start"
input according to the selected signal edge and be stopped by
the shading of a connected light barrier. Measurement range
0 to 9.999 s. Renewed measurement possible, but only after
first pressing the reset button.
5.4 Measurement of the time period between the start of
the first and the third shadings
— Turn rotary switch 6 to the „
— Press the reset button.
After the pressing of the reset button, the display shows four
decimal points which confirm readiness for measurement.
The time period between the first and third shading is meas-
ured and displayed. This enables, for example, the complete
period of swing of a pendulum to be measured with one light
barrier. It is hereby of no importance which light barrier input
is used. The time between the beginning of the first and the
third shading is displayed, regardless of with which light barri-
er the shadings occur.
Alternatively, the timer is started by a signal at the "Start" in-
put according to the selected signal edge and stopped at the
beginning of the second shading of a connected light barrier.
Measurement range 0 to 9.999 s. Renewed measurement
possible, but only after first pressing the reset button.
6 NOTES ON OPERATION
This high-quality instrument fulfills all of the
technical requirements that are complied in
current EC guidelines. The characteristics of
this product qualify it for the CE mark.
This instrument is only to be put into operation under special-
ist supervision in a controlled electromagnetic environment in
research, educational and training facilities (schools, universi-
ties, institutes and laboratories).
This means no mobile phones etc. are to be used in the near
vicinity. The individual connecting leads must not be longer
than 2 m.
The Instrument can be influenced by electromagnetic charges
and other electromagnetic phenomena in such way, that it
works no longer within the given specifications. The following
measures reduce or prevent disturbing influences: Avoid car-
peted floor ensure potential equalization, perform the experi-
ments on conductive and grounded surfaces, use screenings
and screened cables and do not work with high frequency
emitters ( radios, mobile phones etc.) in the immediate vicini-
ty. After a total blackout, carry out a "Reset" (new start) of the
complete system.
www.phywe.com, © All rights reserved
" position.
" position.
7 TECHNICAL DATA
Operating temperature range
Relative humidity
Control
Digital display
Time measurement
Pulse counting
Operating voltage
Power consumption
Supply connector
Overvoltage and reverse
polarity protection
Housing dimensions (mm)
Weight
8 SCOPE OF DELIVERY
Timer 2-1
Power supply 5 VDC/4 A
9 LIST OF EQUIPMENT
The timer can only be used in combination with suitable con-
trol instruments that can be connected to its inputs. All instru-
ments are suitable that open or close a switch contact or sup-
ply an electrical pulse and conform to TTL-Norm. The follow-
ing list provides a selection of instruments that can be con-
nected to inputs 3, 4 and 5:
Falling sphere apparatus
Holding device with cable release
Starter system, mechanical with release
Fork light barrier, compact
Push button switch, circuit closing
10 WASTE DISPOSAL
The packaging mainly consists of environmentally-friendly
materials that should be returned to the local recycling sta-
tions.
Do not dispose of this product with normal
household waste. If this unit needs to be
disposed of, please return it to the address
that is stated below for proper disposal.
PHYWE Systeme GmbH & Co. KG
Customer Service
Robert-Bosch-Breite 10
D–37079 Göttingen
Germany
Telephone +49 (0) 551 604-274
Fax +49 (0) 551 604-246
5-40°C
<80 %
Start/Stop) by electrical cir-
cuits (contact closure/contact
opening or level acc. To TTL-
Norm)
4-Digit LED display, digit
height 19 mm
Measuring range
0,000...9,999 s
resolution1 ms
Measurement range 0...9999
pulses
Limiting frequency 1 kHz,
shading period > 500 μs
(Stabilized) 5 V±5%
(suitable power supply
5 VDC/2.4 A, 13900-99
standardly supplied)
1.8 VA
Connecting socket for hollow
plug, diam. 2.1 mm at the
back of the instrument
5 VDC/350 mA
up to max. 12 V
206 × 130 × 160 (W, H, D)
approx. 920 g
13607-99
12651-99
02502-88
02417-04
11202-13
11207-20
06039-00
13607-99 / 0317
3