Emerson Process Management ControlWave EFM 3808 - Manual (Page 37)

CI-ControlWave EFM Introduction / 1-21
Solar panels mount to a 2" pipe and can be swiveled for optimum alignment with the sun
and their tilt angle is adjustable for maximum performance to accommodate the latitude of
the installation site. Solar panel wires enter the unit through a liquid tight conduit fitting
on the bottom of the enclosure. Internally the solar panel wires connect directly to the
rechargeable battery - PWR (red wire) and GND (black wire) terminals.
1.3.14 RTD Probe
SCM Connector TB2 provides connection to a 100-ohm platinum bulb (using the DIN 43760
curve). The common three-wire configuration is accommodated. In this configuration, the
return lead connects to the RTD- terminal while the two junction leads (Sense and
Excitation) connect to the RTD+ terminals.
1.3.15 External Radio/Modem
In addition to or in lieu of an internal modem/radio an external modem or spread spectrum
radio may be factory installed within the enclosure. A listing of modem and radios is
provided in the Table Of Contents under the topic REFERENCED OEM MANUALS.
1.4 FIELD WIRING
ControlWave EFM electronic flow meters support connection to external field devices
through its field wiring terminals on the System Controller Module and the various I/O
Modules. In some cases a Power Distribution Board is provided and it may be connected to
an external DC Power Supply or Source (such as a Solar Panel, user supplied - nominally 6
or 12Vdc battery) or a user supplied 4.5 to 16Vdc power supply. Connections to the
following types of external devices may be made:
• RTD
• Pulse Inputs (HSCs)
• Analog Inputs (AIs) • Analog Outputs (AOs)
• Digital Inputs (DIs) • Battery/Power Supply/Solar Panel
• Digital Outputs (DOs) • Communications (RS-232 and RS-485)
• Relays
1.5 FUNCTIONS
ControlWave EFM can come with or without a base application program that satisfies API
21.1 requirements for a meter station using up to four meter runs. Using ControlWave
Designer, the user can readily modify this load to add or subtract functions, increase the
number of runs, etc. An overview of the base application load is provided below.
• Uses pre-configured web pages for user readings, configuration and maintenance web
pages can be modified and new pages configured to work with a modified application
load
• Application load is object oriented
• Standard configuration is a four-run station
• Each run can be orifice, turbine or ultrasonic meter type
• Flow calculations include the following:
• AGA3-1985/NX-19
• AGA3-1992 with selectable AGA8 Gross or AGA8 Detail
• AGA7/NX-19