Multifunction Timer / Counter
3700 Sagamore Parkway North . Lafayette, IN 47904 USA . Phone: (765) 423-1505
14
Split Timing with Infrared Switches Model 63501IR
The 54035A Multifunction Timer/Counter can be used in many applications where split timing is required
(i.e. track and field events). To set the 54035A for split timing, press the MODE button and select “1-single”.
The menu will ask for the desired number of split times (up to four). The menu will then ask to select either
normally open (NO) or normally closed (NC) switch types. Since the infrared switches will be used, all switch
types should be set to NO (this is the default setting for the switch types, so press “3-end” to skip the setup if
no changes have been made).
To set up the switches
1. Set the 54035A to “single” mode with the desired number of split times.
2. Connect the red binding post of each switch to a stop input on the rear of the 54035A.
3. Connect the black binding post of each switch to the one of the four GND inputs on the rear of the 54035A.
To start an event, a remote pushbutton can be connected to the START input on the rear of the 54035A, or a
trial can begin by pressing the START button on the front panel. The infrared switches should be positioned
as desired to record events. The 54035A will automatically show the order in which the switches are triggered.
Figure 5: 63501IR/54035A Connection Diagram
Using the Timer for Over Four Split Times
If more than four split times are desired, a second 54035A can be added to the setup. Use the second START
input on the first timer to connect to a START input on the second timer. Also be sure to connect one GND
input from the first timer to a GND input on the second timer. Setup the second timer as the first with switches
connected to the appropriate STOP and GND inputs. A single start button can then start both timers with each
stop showing total elapsed time from the initial start. Any number of clocks can be added in this way as long
as there is a common start signal and a common GND connection between all of the different clocks.
