Reference Manual
00809-0100-4860, Rev BF
Specifications and Reference Data
May 2019
90
Rosemount 8600 Vortex Flow Meter
Damping
Flow Damping adjustable between 0.2 and 255 seconds.
Process Temperature Damping adjustable between 0.4 and
32 seconds (MTA Option Only).
Response time
Three vortex shedding cycles or 300 ms, whichever is
greater, maximum required to reach 63.2% of actual input
with the minimum damping (0.2 seconds).
Turn-on time
HART analog
Less than four (4) seconds plus the response time to
rated accuracy from power up (less than 7 seconds with
the MTA Option).
Transient protection
The optional transient terminal block prevents damage to
the flowmeter from transients induced by lightning,
welding, heavy electrical equipment, or switch gears. The
transient protection electronics are located in the terminal
block.
The transient terminal block meets the
following specifications:
IEEE C62.41 - 2002 Category B
3 kA crest (8 3 20 s)
6 kV crest (1.2 3 50 s)
6 kV/0.5 kA (0.5 s, 100 kHz, ring wave)
Security lockout
When the security lockout jumper is enabled, the
electronics will not allow you to modify parameters that
affect flowmeter output.
Output testing
Current source
Flowmeter may be commanded to set the current to a
specified value between 4 and 20 mA.
Frequency source
Flowmeter may be commanded to set the frequency to
a specified value between 0 and 10000 Hz.
Low flow cutoff
Adjustable over entire flow range. Below selected value,
output is driven to 4 mA and zero pulse output frequency.
Humidity limits
Operates in 0–95% relative humidity under
non-condensing conditions (tested to IEC 60770, Section
6.2.11).
Overrange capability
HART analog
Analog signal output continues to 105 percent of span,
then remains constant with increasing flow. The digital
and pulse outputs will continue to indicate flow up to
the upper sensor limit of the flowmeter and a
maximum pulse output frequency of 10400 Hz.
Flow calibration
Meter bodies are flow-calibrated and assigned a unique
calibration factor (K-factor) at the factory. The calibration
factor is entered into the electronics, enabling
interchangeability of electronics and/or sensors without
calculations or compromise in accuracy of the calibrated
meter body.
A.3 Typical flow ranges
Tables A-5 through A-12 show typical flow ranges for some
common process fluids with default filter settings. Consult
your local sales representative to obtain a computer sizing
program that describes in greater detail the flow range for
an application.
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