Campbell Scientific PVS4100/4120/4150 Portable Automatic Samplers - Manual (Page 41)

5-1
Section 5. Programming
5.1 General Programming
5.1.1 Guidelines
Controller settings may be changed at any time. Changes are termed NEW
ENTRIES. No NEW ENTRIES will be acted upon unless the controller is
RESTARTed. Once RESTARTed, all NEW ENTRIES become ACTIVE
SETTINGS.
Every time the controller is RESTARTed, all accumulators (i.e. SAMPLES
TAKEN, TIME REMAINING, REMAINING PULSES, etc.) are cleared
and the ACTIVE SETTINGS are reloaded unless NEW ENTRIES have been
made.
Remember - Start Delay is reloaded too !!
5.1.1.1 Flashing Text
Flashing text is the system wide prompt that indicates an input is required from
the user. Flashing words or duel flashing digits prompt for arrow keys to be
pressed to scroll through available options. A single flashing digit prompts for
a numeric key to be pressed. When the desired option or number is shown on
the display, press the ENTER key.
5.1.1.2 Real Time Clock
The controller has two basic timing modes. The simplest of these requires no
maintenance; it simply provides a “heartbeat” for various timed functions. The
other timing mode is the REAL TIME CLOCK that is used in several functions
and must be correctly set. This is likely the first item requiring
programming. Although time may have been set at the factory, time zone shifts
may require adjustment of the Real Time Clock.
5.1.1.3 Total Bottles
Since the number of bottles is usually determined by customer requirement at
the time of purchase, this variable will normally be set at the factory to match
the actual container hardware. Choices are restricted to a single container (as in
composite) or 2, 3, 4, 6, 8, 12 or 24. These all form instructions to the stepper
motor in how it will behave when the internal command is given to step to the
next container (as each step increment is 15°).