Cooper Instruments & Systems DFR 1250 Two Channel Paperless Recorder - Manual (Page 18)

TSFM 500 DC 16 32-1101 REV 2 710
6.4 Cycling Mode
This mode cycles the test stand between limit switches, load set points, or travel distance set points (TSTM / TSTMH
only), whichever occurs first. One cycle consists of the following steps:
1. Test stand moves to a limit at the specified speed.
2. Test stand stops for the specified amount of dwell time.
3. Test stand reverses direction, returns to the other limit at the specified speed, and stops.
A cycling sequence can be initiated from any position and can start in either direction. If the test stand is at a limit,
however, cycling can only be started in the direction of the other limit. To initiate a cycle sequence, press UP or DOWN.
During a cycle sequence, a counter will be displayed, indicating the number of cycles remaining, as shown below:
As in Basic Mode, the min, max, and set soft keys are active during crosshead movement. When the cycling sequence
has ended and the test stand has stopped at a load set point or travel distance set point, the limit condition may be
overridden by pressing and holding UP or DOWN for two seconds.
6.4.1 Dwell time
Dwell time is the amount of time, in seconds, for which the test stand stops at a limit during a cycle sequence. When the
test stand has reached a limit, a counter will be displayed, shown as follows:
If the DWELL U and/or DWELL L settings are set to 0, the test stand will immediately reverse direction upon reaching
the corresponding limit, and no counter will be displayed.
The cycle sequence may be interrupted before it has been completed by pressing STOP. A soft key labeled RESET will
appear as follows:
At this point, there are two options:
1. Canceling the cycle sequence:
Press RESET to stop and reset the cycle sequence. The cycle counter will revert to the number of cycles originally
programmed.
2. Resuming the cycle sequence:
Press UP or DOWN to resume.