Emerson Daniel 3818, Installation Manual

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Table 1-2: Meter specifications
(continued)
Liquid meter specifications
Temperature flameproof Transmitter Electronic
Enclosure and Base Electronics Enclosure Serial cable
• Belden #9940 or equivalent (22 gauge)
— Capacitance (pF/m) 121.397 (conductor
to conductor)
— Capacitance (pF/m) 219.827 (conductor
to other conductor and shield)
— Resistance (DC) DCR @ 20°C (Ohm/km)
48.2307 Nominal Outer shield resistance
- DCR @ 20°C (Ohm/km) 16.405
— Operating voltage - 300 V RMS (UL AWM
Style 2464)— Current 2.4 Amps per
conductor @ 25°C (recommended)
Ethernet cable
• Cat-5 Standard 100Mbps
Frequency (see Table 3-5)
• 22 AWG wire characteristics are as follows:
— Capacitance = 20 pF/ft or 20 nF/1000 ft
(between two wires)
— Resistance = 0.0168 Ohms/ft or 16.8
Ohms/1000 ft
— Pull-up voltage is 24 VDC
Transducers • LT-07
• Operating Temperature Range -321 °F to
+140 °F (-196 °C to 60 °C)
Communications specifications
Connectivity protocols One serial RS-232/RS-485 ports (115 kbps baud
rate) (Modbus RTU/ASCII)
• (1) Serial Port A (RS-232/RS-485 Full Duplex/
RS-485 Half Duplex)
One Ethernet Port (TCP/IP) 100 BaseT
• Up to 10 Mbps
• Modbus TCP
Device compatibility FloBoss 103, FloBoss S600 flow computer, ROC
107
Digital, analog, and frequency inputs
Digital Input(s) (Selectable) (1) Single polarity (for flow calibration gating -
contact closure)
• Single input for starting and stopping
• Four pulse configurations available
Introduction Installation manual
May 2019 3-9000-771
20 3818 LNG Liquid Ultrasonic Meter