Rosemount 8800D Series User Manual

Reference Manual
00809-0100-4004, Rev BA
August 2010
Rosemount 8800D
5-6
TP1 TP1 is the vortex shedding signal after it has gone through the charge amplifier and
low pass filter stages and into the input of the sigma delta A-to-D converter ASIC in
the electronics. The signal strength at this point will be in the mV to Volt range.
TP1 is easily measured with standard equipment.
Figures 5-3, 5-4, and 5-5 show ideal (clean) waveforms and waveforms that
may cause the output to be inaccurate. Please consult the factory if the
waveform you detect is not similar in principle to these waveforms.
Figure 5-3. Clean Signals
Figure 5-4.
Noisy Signals
Trigger
Level
Vortex Signal (TP1)
Shedding
Frequency
Output
0
3.0 V
0
Vortex Signal
(TP1)
Trigger
Level
Shedding
Frequency
Output
0
3.0 V
0

Rosemount 8800D Series Specifications

General

Type	Vortex Flow Meter
Measurement Principle	Vortex Shedding
Operating Temperature	-40 to 185°F (-40 to 85°C)
Storage Temperature	-40 to 185°F (-40 to 85°C)
Communication Protocols	FOUNDATION Fieldbus
Material	316 stainless steel
Fluid Type	Liquid, Gas, Steam
Line Size	1/2 to 8 inches (15 to 200 mm)
Approvals	ATEX, IECEx, CSA, FM
Output Signal	4-20 mA
Process Connection	Flanged, Wafer, Threaded
Electrical Connection	M20
Protection Rating	IP66
Mounting Style	Wafer, Flanged