Emerson Rosemount 3814 Instruction Manual page 15

Installation manual
00825-0100-3814
Table 1-2: Meter specifications
Liquid Meter specifications
Accuracy Limits
Power
Temperature flameproof Transmitter
Electronic Enclosure and Base Electronics
Enclosure
Rosemount 3814 Liquid Ultrasonic Flow Meter
(continued)
• Accuracy limits typically are:
— ±0.20% without a flow calibration
Meter
• 10.4 VDC to 36 VDC
• 11 W typical power consumption
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
• 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
Introduction
January 2023
Table 3-1)
15