AW Gear Meters RT-30EX - Manual (Page 27)

RT-30EX Flow Transmitter
Operation and Programming Manual
27
RT-30EX User Manual, Rev. 1.7 02/07/2012
minus the MARGIN value. The programmed Limit Margin must be less than the programmed Rate
Value.
TOTAL & GRAND TOTAL Limits
TOTAL / GRAND TOTAL Value
Enter the Total or Grand Total value at which the respective Limit output should change state. When
the Total or Grand Total is reset to zero, the limit pin changes back to initial state.
Frequency output programming
The third output can only be set to output the incoming frequency. From the top Limit programming
menu, choose the Frequency Output option, press
ENT and use the UP or DN button to turn the output
frequency on. There are no other variables to program. The output frequency is not affected by the
Gate Time filter and cannot be linearized. It is always the raw incoming frequency from the sensor.
Gate Time filter
This variable sets the sample time on the incoming frequency for the RATE displays. Programmed in
tenths of a second with an allowable range from 0.1 to 999.9 seconds, this variable affects the update of
the display and analog output, and is useful in stabilizing the display and output when dealing with
fluctuating flow rates. Setting the Gate Time to zero (0) disables the Gate Time filter and all data is
updated at an internal default rate of approximately 0.02 seconds. If the Gate Time filter is active (any
non-zero value) any run mode screen affected by the filter will show ‘GT’ in the lower right hand corner
of the screen.
Total Value
00000.00 GAL
Grand Total Value
00000.00 GAL ENT ENT
TOTAL Limit GRAND TOTAL Limit
Select Limit
Frequency Output
Select Limit type
> ON
ENT
Gate Time Filter
(in seconds)
001.0
ENT
Figure 35: Frequency Output programming
Figure 36: Gate Time variable
Figure 34: Total & Grand Total limit variables