ADS Environmental Services FlowShark Pulse QR 775004 A1 - Manual (Page 122)

8-32 ADS FlowShark Pulse O&M Manual
z Control OPEN Wires the slide end switch for open condition to the selected
digital input
z
Torque Connects the torque switch for closed condition to the selected
digital input
z
Lock V-measurement Configures DI 1 to lock the measurement
exclusively. The display will read Measurement locked. No output from
AO + DO.
This function is designed particularly for locations that characteristically
experience turbulent backwater conditions. To effectively use this function,
the flow velocity reading must be either locked or released at a specific
threshold value corresponding to the peak overflow. For example, detection
could occur using a separate echo sounder, float switch, or conductive sensor.
A locked measurement means that flow velocity reading will be set to 0.
Therefore, the volume will be calculated based on a velocity reading of 0,
eliminating analog or digital flow output. Enabling the option for saving
single velocity gates will ensure the unit saves individual velocity readings
without using them in calculations.
Digital inputs are passive and, therefore, are supplied by an
external 2- V DC power supply. The signal current is 10 mA. To
ensure reliable conductivity, use relay or end switch contacts made
of a high-quality material.
Logic
Toggle between inverse and non-inverse input by pressing ALT. For example, this
can allow a user to configure the unit to view closed slide valve signals under normal
conditions. Therefore, a constant signal level would be equivalent to a disengaged
end switch, allowing the unit to detect cable breaks easily.
Parameter Menu: Analog Outputs
Figure 8-45 Analog outputs – submenu