Owner manual
Table Of Contents
- Parts List
- Specifications
- Basic Functions
- How You Will Use the Model 725
- Installing timerPRO Software
- Setting Up the Model 725
- Field Upgradeable Software
- Getting Help
- Back Panel Inputs and Outputs
- Front Panel Controls
- Main Screen
- General Settings
- Channel Properties Screen
- Quiescent States
- Logic
- Timing Modes
- “Apply” versus “Program All Channels”
- Fixed Output Mode
- Passive Mode (Output = Input)
- Clocked Pulse Stream Mode
- Delayed Pulse After Trigger Mode
- Important Delay Timing Considerations
- Validated Trigger Input Mode (Noise Suppression)
- Timer Mode
- Dynamically-Delayed Pulse Mode
- Toggled Output Mode
- Dynamic Delay Compensation Mode
- Storing and Recalling Experiment Files
- Front Panel Controls and Indicators
- Selecting a Channel from the Front Panel
- Performing a Front Panel Function
- Store/Recall Settings Profiles

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6. On Channel A’s Logic tab, enter: inA = outB and outC; (You’ll learn more about channel
logic in the Logic section above).
7. On Channel A’s Counter tab, select milliseconds as the units.
8. Click Disable, then click Apply.
9. Lastly, go “on line” and click Send Logic on the Main screen to update the new logic for all
channels.
10. On Channel A’s properties screen click Enable.
The time difference measurements should now appear, in rapid succession, in the Last Measured
Period box on Channel A.
NOTE: The Model 725 may be measuring time differences faster than it can display
them all on the monitor.
Now, check Hold measurement. Note that the displayed measurement does not change. Uncheck
Hold Measurement, then re-check Hold measurement again to freeze another measurement.
Dynamically-Delayed Pulse Mode
The dynamic delay first measures the time difference between two pulses, like a timer. Next, it
scales that difference by a user-defined factor. It subtracts an offset value, waits the duration of
the dynamically calculated delay, then sends a pulse to the channel output.
NOTE: The dynamic delay is particularly useful for ballistics or gas dynamics
experiments, in which the velocity of a projectile or wave must be calculated and used to
time the triggering of an experimental device.
Dynamically Delayed Pulse mode includes several properties tabs.










