Precision Digital Corporation PD6928, Инструкция по эксплуатации

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PD6928 Loop-Powered Flow Rate/Totalizer Instruction Manual
10
Rate/Totalizer Features
Display Flow Rate & Total at the
Same Time
The PD6928 can display flow rate and total at the same
time. In addition, the meter can toggle between the rate
and total and their corresponding units as the following
example illustrates.
Total Limit & Initial Value
The Advanced
– Total Count
menu allows the digit
limit to be selected between 8-digit (bottom display
only) and 13-digit (uses top and bottom display to
display the full number).
The user can set the initial value at which the total
and grand total should start counting.
Using 13 Digits to Display Total
The top and bottom displays can be set up to display a
13-digit total.
Note: The number above should be read as
6,843,276,349,157
Total & Rate in Different Units
The user can select to display total in different units than the
rate. For instance, a customer could measure flow rate in
gallons per minute and total in acre-feet by simply selecting
AF (acre-feet) units for the total. Additionally the user can
enter a custom unit and conversion factor to display the total
in any unit of measure.
Rate in Units Per Second, Minute,
Hour, or Day
The user may select a rate time base in units per second,
minute, hour, or day. The time base is the amount of time
over which the rate parameter will totalize. For example, if
the rate was 10 gallons/min (and stayed constant for one
minute), then the total would increase by 10 every minute.
4-20 mA Output for Rate or Total
The 4-20 mA output can be assigned to the rate or the total.
Total Stored in Non-Volatile
Memory
Total and grand total values, and all programmed settings
are stored in non-volatile memory for a minimum of ten years
if power is lost.
Total Reset Capabilities
The total and grand total can be reset using a
CapTouch button, an external contact closure on the
digital input, or MeterView XL software. In addition,
both total and grand total reset can be password
protected to prevent unauthorized resets.
Total Reset via CapTouch Button
The CapTouch function key F2 is set up to reset the
total. If reset grand total is enabled, it is possible for the
user to reset either the total or the grand total without
removing the cover or the need for external devices.
Total Reset via Digital Input
The
PD6928’s digital input can also be used to reset the
total or grand total.
Total Reset Password Protection
Total and grand total passwords can be set to prevent
resetting the total or grand total unless a password is
entered. Grand total reset can be disabled through
the meter interface, and it can also be permanently
disabled.
Non-Resettable Grand Total
The user can set up the grand total to be non-resettable by
selecting
YES
at the
PERMLOC
menu; see page 61 for
details. Once this is done, the grand total can never be reset.
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DI