DigitalFlow™ Multipurpose Ultrasonic Liquid Flowmeter Startup Guide (1- and 2-Channel) 43
Chapter 4. Specifications
4.2.6f Totalizer/Frequency Output Options:
Select up to 3 Totalizer/Frequency Output Boards, each with four outputs per board, 10 kHz max.
All boards allow software-selectable functioning in two modes:
Totalizer Mode: one pulse per defined unit of parameter (e.g., 1 pulse/gal).
Frequency Mode: pulse frequency proportional to magnitude of parameter (e.g., 10 Hz = 1 gpm).
4.2.6g Alarm Options:
Select up to 2 boards of one of the following types:
Basic Relay Board with three general purpose Form-C relays.
Hermetic Relay Board with three hermetically sealed Form-C relays.
Maximum Relay Ratings:
120 VAC AC Voltage, 28 VDC DV Voltage, 5A AC/DC Current,
60 VA AC Power, 30 W DC Power (General Purpose) or
56 W DC Power (Hermetically Sealed)
Note: A maximum of six input/output option boards may be installed.
4.3 Operational Specifications
The operational specifications for the Model DF868 flowmeter are divided into the following categories:
4.3.1 Site Parameter Programming
Menu-driven operator interface using keypad and “soft” function keys. Storage for 10 sites.
4.3.2 Data Logging
Keypad-programmable for setting up log units, update interval, start and stop times. Memory capacity for more than
43,000 flow data points in a linear or circular log.
4.3.3 Display Functions
Liquid crystal graphic display shows flow in numeric or graphic format. Also displays logged data and diagnostics.
4.3.4 Printer Signal Output
Supports wide variety of thermal and impact printers. Output data in numeric or graphic (“strip chart”) format.
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