5
2. USING THE HL 640-1 TRANSMITTER
Hardware
1 Input for accessing signals from a timing sensor (start gate, photocell, tape switch, manual
button, and start gun transducer) and 4 programmable TIMING CHANNELS:
In Mode AUTO SPLIT
CHANNEL 1
Must be used for the START channel. This channel triggers all ChronoSplit times to
start from zero. Only the last received start signal is used by the ChronoSplit. When a
valid START impulse is received on channel 1 the ChronoSplit will display ( -- -- -- -- )
to confirm receipt.
CHANNEL 2 and 3
Both have the same function and serve as an intermediate time point. Provides
unlimited intermediate time functions in a sequential numbering system with BEST time
indication for the session..
CHANNEL 4
Must be used for the FINISH of each timing run (session) In AUTO SPLIT mode the
receipt of this channel signal ends the timing session and stops all other timing until
another valid START signal is received. If a timing session does not end with a channel
4 impulse the ChronoSplit will automatically create a new timing session when a new
start is received.
In Mode AUTO LAP
CHANNEL 1
Used as the START on the initial LAP plus is used to signal the end of each successive
lap with sequential numbering of each lap recorded on the LCD display. BEST lap of
each session is indicated
CHANNEL 2
For the 1
st
intermediate time within a LAP (times are memorized but not visible on the
LCD display)
CHANNEL 3
For the 2
nd
intermediate time within a lap (inter 1 / inter 2)
CHANNEL 4
For the 3
rd
intermediate time within a lap (inter 3 / inter 4)
A 4
th
intermediate is also calculated (inter 3 / finish)
TEAM
4 choices of TEAM designation so that up to 4 different sets of timing equipment may be used by 4 different
teams within the same radio reception area without interference. TEAM number on transmitters must match
TEAM number on the ChronoSplit.
LEDs
4 Light Emitting Diodes (LEDs) as indicator lamps to asses battery condition (press BATT) and to select and
confirm TEAM and CHANNEL settings on each transmitter
BEEP
Acoustic confirmation tome emitted with each valid transmission or TEST.
TEST
A TEST button to send and simulate TEST radio signals without triggering by an external sensor on the
inputs, or for manual use at the timing point without a sensor (photocell etc.).
WARINING
Transmitters must be installed in a vertical position with the antenna clear of any
obstruction or mounting device. Optimally install at least 1 meter above the ground or as
high as possible. For start or intermediate locations that are close to the start position you
can restrict transmission distance by placing the transmitters closer to the ground (20-
30cm). This technique should be tested prior to timing and will depend on the terrain profile
in the timing area between timing points.
Summary of Contents for Chrono Split HL 640
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