ALGE-Timing TdC 8000 Manual page 19

When fully loaded the battery has about 7.4 V. The empty battery has a voltage of about 5.5 V. At
this voltage the device switches off. A battery warning appears on the info-display (6) when the
power is 6.2 V or lower.
The stabilized voltage "photocell" supplies the photocells and must be about 5 V.
The current for extender-devices must be less then 1 A (interface RS 485 (23)). If the current
reaches 1 A it switches the supply for the extender off.
Line Test - Checking the Start and Finish Line:
Checking a 1 pair cable which is connected at banana socket c0, c3, or c6.
- Switch TdC 8000 on (switch 26)
- Select the program
- Make the program ready for timing
- press <TEST> (keep it pressed)
- The info-display (6) shows the TdC 8000 measurements
- Measurement of channel c0, c3 and c6 is important for the line test
Short-Circuit-Test:
- Cable is open on the start side
- Press <TEST> (press key until you finish the test)
- The voltage of the open channel (c0 , c3, or c6) must be about 4.9 Volt
Resistance-Test:
- Short circuit the pair on the start side (press banana plug together)
- Press <TEST> (press key until you finish the test)
- The voltage with shorted channel (c0, c3, or c6) must be between 0 and 0.9 Volt. If the
voltage
is higher than 0.9 V the resistance of the cable is too high (maximum 2000 W loop
resistance).
The line test meter is only for quick reference. Please use a multitester set on Ohms for accurate
testing of your wiring. Remember that resistance on the line will change due to weather conditions.
Always check the condition of splices, especially in extremely cold temperatures. Scotchlocks and
AMP locks have a bad habit of opening due to the expansion rate differences between the copper
wire and the steel splicing plate. You should use the older "White Bean" connectors if there is a
chance that temperatures will fall to below -10 F (-15°C).
Most of the problems with timing installations are due to wiring on the course. Please take the time
to review your wiring early in the season. Bad splices and connections will only get worse as time
goes on and they are a lot easier to deal with in the Fall before the pedestals get covered with
snow.
Please call your ALGE agent for assistance with wiring. They are able to consult with you on proper
wiring plans and are usually available to travel to your site for more detailed work at reasonable
expense.
Needle of meter (3) swings:
The needle of the meter starts to swing as soon as the photocell is out of line. Please check
the set up of the photocell. A swinging needle could also be coffed during a very long timing
impulse or through a short-cut of the cable.
Version: E-01-08-08
TdC 8000 for Equestrian
Page 19
Page 19