AW Gear Meters RT-15 - Manual (Page 18)

RT‐15 Flow Monitor
Operation and Programming Manual
17
Turn Logo Screen Back On
You can turn the LOGO screen off, but, as it will no longer appear, there is no way to access screen
programming. If you turn off the LOGO display for any reason, you can restore to allow access to screen
programming again. Cycle the power to the RT‐15 while you press and hold the ENT button (or maintain
the ENT magnetic switch). This reactivates the LOGO screen as DISPLAY 00 and restores access to LOGO
screen programming.
Rate Display Mode
The RT‐15 continuously calculates rate by two methods simultaneously:
 Gate Time, and
 Pulse Width.
Gate Time (RATE A GT)
The RT‐Ex 15 displays rate based on the number of pulses the device counts during a prescribed time
period. The RT‐Ex 15 updates RATE A GT at the programmed interval regardless of the input frequency.
Increasing the gate time interval produces a filtering or averaging effect useful for stable display and
output of uneven or intermittent flows. The RT‐15 analog output is assigned to RATE A GT.
Pulse Width (RATE A PL)
Rate is displayed based on the time from pulse edge to pulse edge. The Pulse Width Method is highly
responsive, updating more frequently at high input frequencies and less frequently at lower input
frequencies. RATE A PL is useful for observing flow variations or peak intermittent flows. A digital filter
SAMPLE A can be used to produce a more stable display response.
RATE A Gate Time (RATE A GT)
Displays the rate by the gate time method based on the programmed GATE AB variable. It is displayed
based on the corresponding KFR factors, decimal locations, and engineering units. The zero cutoff
frequency for display and analog output is .3 Hertz. View the pulse length measurement RATE A PL using
the SEL button (or magnetic switch) while in the RATE A GT display as illustrated below. The rate display
reverts to RATE A GT if power is cycled to the RT‐15. Typical display: