PD6928 Ex-Proof & I.S. Loop-Powered Flow Rate/Totalizer
Instruction Manual
52
Stopwatch (
STPWATCH
)
The stopwatch function may be used to manually run and control a process for a specific time interval up to 99 hrs.,
59 min, and 59 seconds. The stopwatch function may be assigned to any relay. There are three settings needed to
use the function effectively.
1. Assign stopwatch to either top or bottom display
2. Assign the relay to control the process (on/off)
3. Assign a function key or digital input to start/stop the stopwatch
Application Example
To maintain consistency of a product, it is necessary to take and test samples at different times throughout the day.
The stopwatch function is used to open and close a solenoid valve to know the exact amount of time needed to
complete the desired sample. Once this is determined, the timer function can be used to automatically take a sample
(batch) based on the time determined using the stopwatch function.
Setup:
Assign the following to
Stopwatch Function
•
Bottom display
(see pages 37 & 39 for details how to change the display)
•
Relay 1
(see pages 40 & 46 how to change Open Collector and Solid-State Relay functionality)
•
F3: Start/Stop
(see pages 65 & 66 for details on how to change the function keys)
Procedure
•
Press F3 to start the stopwatch; relay 1 turns on and the process starts running.
•
Press F3 to stop the stopwatch; relay 1 turns off and the process stops.
•
The bottom display indicates the time it took to complete the sample.
Runtime & Cycle Count (
INFO
)
The relay information menu shows runtime and cycle count for each relay. These values may be cleared at any time
by selecting the
Clear
option (
CLEAR?
).
