R:\Timing\PRODUITS\HL2-33\EN\HL2-33_EN_02-09.doc
12.02.2009
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To line up correctly these double photocells, line up first the upper
transmitter with the upper receiver. The bottom photocells are OFF.
•
When the alignment is correct, turns OFF the upper photocells and ON the
bottom one and line up them correctly.
•
Then, switch ON again the upper photocells and test them masking one of
the transmitter and after the other one.
•
If the transmitters and receivers are close of each other (2 - 3 cm), each
transmitter can be lined up on both receivers. In this situation, the double
photocell is very reliable for the main and back up system.
OPERATION INSTRUCTIONS
Set-up and switch on ONE transmitter with
(10)
in
LOW
mode. (Use HIGH
only when necessary)
Switch on the photocells
(2)
on
“IMPULSE”
mode (standard use) or
“DIRECT”
mode
Depending on the sport to be timed and the application, it may be necessary
select either “direct” trigger output to the timer, or to have a period of time in
which the photocells’ output pulse for timing is blocked (“Impulse”) between
the impulse generated and the NEXT impulse sent.
The most popular method is to use “Impulse” settings so that you can adjust
(using the lower knob) the Impulse signal width from 0.01 seconds to 2.4
seconds.
“Direct” ties the output trigger “directly to the photocell sensor. The impulse
length is thus not adjustable and is always a function of how long the photocell
signal is obstructed. This can be very useful for determining out-of-alignment
status or how many objects pass in sequence in front of the cells.
Watch very carefully for BOTH the BATT and OSC (Oscillator Syncro Lock)
LEDs to illuminate briefly and then immediately go out. This is the NORMAL
start-up condition and it is important to see it happen this way. If the
Transmitter OSC or BATT lights don’t flash momentarily at
power-up or remain on (or flash) after power-up, remedial action is required
(as described below).
A) Battery Check
When you switch on the photocell, the LED
(3) "BATT"
illuminates briefly and
goes out.
