Emerson IFT9701 - Manual (Page 67)

Model IFT9701 Transmitter Instruction Manual 59
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8.4 Power supply
If power supply wiring is installed incorrectly, or the flowmeter is improperly grounded, the meter
will not operate properly. Follow these steps to check power supply wiring and grounding:
1. If a switch was installed in the power supply line, be sure the switch is in the ON position.
2. Check the power supply voltage, and make sure it matches the voltage listed on the label in the
flowmeter’s power supply wiring compartment. See Figure 8-2.
3. Turn power supply OFF.
4. At the terminals indicated in Figure 8-2, make sure wires are secured tightly and making good
connections. Make sure no bare wires remain exposed.
5. Wiring must be 20 AWG (0,5 mm²) to 16 AWG (1,5 mm²) wire.
6. Maximum wire lengths for a DC power supply are as follows:
Table 8-2 Conditions indicated by optional LCD
Optional LCD reads: Condition
Mass or volume flow rate (such as “100.00”) Normal operation
“OL0” Flow rate has exceeded upper limit of display
“ 88.8.8.0” Startup and initialization
“ZERO0” Zero in progress
“SLUG0” Slug flow (density below or above user-defined limits)
“ELEC0” Transmitter hardware failure, zero failure
“SENS0” Sensor failure, faulty cable, process over range, density above or
below transmitter limits
Remains OFF Power supply failure
WARNING
Line voltage can cause electric shock or flowmeter
damage.
Disconnect power before accessing power supply
terminals.
Power-supply wire size Maximum length
16 AWG (1,5 mm²) 1500 feet (450 meters)
18 AWG (0,75 mm²) 1000 feet (300 meters)
20 AWG (0,5 mm²) 600 feet (200 meters)