Emerson Rosemount 8600 Series, Справочное руководство, Страница: 96 / 130

Reference Manual
00809-0100-4860, Rev BF
Specifications and Reference Data
May 2019
88 Rosemount 8600 Vortex Flow Meter
Process temperature limits
Standard
-58 to 482 °F (–50 to 250 °C)
Output signals
4–20 mA digital HART signal
Superimposed on 4–20 mA signal
Optional scalable pulse output
0 to 10000 Hz; transistor switch closure with adjustable
scaling via HART communications; capable of switching
up to 30 Vdc, 120 mA maximum.
Analog output adjustment
Engineering units and lower and upper range values are
user-selected. Output is automatically scaled to provide 4
mA at the selected lower range value, 20 mA at the
selected upper range value. No frequency input is required
to adjust the range values.
Scalable frequency adjustment
The scalable pulse output can be set to a specific velocity,
volume, or mass (i.e. 1 pulse = 1 lb). The scalable pulse
output can also be scaled to a specific rate of volume, mass,
or velocity (i.e. 100 Hz = 500 lb/hr).
Ambient temperature limits
Operating
–58 to 185 °F (–50 to 85 °C)
–4 to 185 °F (–20 to 85 °C) for flowmeters with local
indicator
Storage
–58 to 250 °F (–50 to 121 °C)
–50 to 185 °F (–46 to 85 °C) for flowmeters with local
indicator
Pressure limits
Flange style meter
Rated for ASME B16.5 (ANSI) Class 150, 300, EN 1092
PN 16, 40, and 63
Power supply
HART analog
External power supply required. Flowmeter operates on
10.8 to 42 Vdc terminal voltage (with 250-ohm
minimum load required for HART communications,
16.8 Vdc power supply is required)
Power consumption
One watt maximum
Load limitations (HART analog)
Maximum loop resistance is determined by the voltage
level of the external power supply, as described by:
Note
HART Communication requires a minimum loop
resistance of 250 ohms.
Table A - 3. Maximum Measurable Meter
Velocities (1)
(Use the smaller of the two values)
Feet per Second Meters per Second
Liquids
Gases
The

is the process fluid density at flowing conditions in
lb/ft 3 for ft/s and kg/m 3 for m/s
1. Velocities are referenced to schedule 40 pipe.
90,000/  or 25
134,000/  or 7.6
90,000/

or 250 134,000/

or 76
R
max
= 41.7(V
ps
– 10.8)
V
ps
= Power Supply Voltage (Volts)
R
max
= Maximum Loop Resistance (Ohms)
Power Supply (Volts)
Lo
ad
(O
hm
s)
Operating
Region
1250
1000
500
0
10.8
42