MD-300 User’s Manual Page 12
MD-300 User’s Manual Page 12 (Cont’d)
Simultaneous Operation of Two MD-300 Timers
If your event requires simultaneous operation of two com-
plete timers (both timers start and stop at the same time
and provide backup for each other), the MD-300 Electronic
Timer can provide this capability. However, if two light
sources (Transmitters) are on at the same time, and pointing
in the same direction, they may interfere with each other at
the light detector unit (Receiver) and prevent proper opera-
tion. The following options are available to ensure proper
operation:
1) Set up both timers, but turn on just one of the two
Transmitters. Both Receivers will "see" the beam, but
since the beam is coming from only one Transmitter,
there is no interference. This provides fully redundant
timing. This also allows you to switch to the second
Transmitter after 10-12 hours of battery operation
have expired on the first Transmitter, and run for an-
other 10-12 hours on battery.
2) Set up both timers, but have the pairs of eyes pointed
in opposite directions. I.e., each side of the arena will
have a Transmitter and a Receiver. With this configu-
ration, both Transmitters can be on at the same time.
CARE OF YOUR TIMER
Your new timer has been designed to withstand a rough en-
vironment and treatment. However, a little extra effort to
take care of your timer and keep it clean will greatly extend
its life and reduce the chance of failure. The carrying case is
the "heart" of your timer care routine. Always store and
carry your timer in this case.
The Transmitter and Receiver units have been designed to
withstand a little rain. However, they are not waterproof. Do
no leave them uncovered during a heavy thunderstorm. If
they get very wet, allow them to dry out before using them
again.