Emerson Daniel 3814, Руководство по установке

Страница: 21 / 110

Table 1-2: Meter specifications
(continued)
Liquid Meter specifications
Accuracy Limits • Accuracy limits typically are:
— ±0.20% without a flow calibration
Power Meter
• 10.4 VDC to 36 VDC
• 11 W typical power consumption
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 3-1 )
• 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
Installation manual Introduction
3-9000-760 May 2019
Installation manual 21