Rosemount 8800D Series User Manual

Reference Manual
00809-0100-4004, Rev BA
August 2010
2-7
Rosemount 8800D
Failure Mode vs.
Saturation Output Values
The failure mode alarm output levels differ from the output values that occur
when the operating flow is outside the range points. When the operating flow
is outside the range points, the analog output continues to track the operating
flow until reaching the saturation value listed below; the output does not
exceed the listed saturation value regardless of the operating flow. For
example, with standard alarm and saturation levels and flows outside the 4—
20 mA range points, the output saturates at 3.9 mA or 20.8 mA. When the
transmitter diagnostics detect a failure, the analog output is set to a specific
alarm value that differs from the saturation value to allow for proper
troubleshooting.
.
.
LCD Indicator Option If your electronics are equipped with the LCD indicator (Option M5), the
ALARM and SECURITY jumpers are located on the face of the indicator as
shown in Figure 2-6.
Table 2-1. Analog Output: Standard Alarm Values vs. Saturation Values
Level 4—20 mA Saturation Value 4—20 mA Alarm Value
Low 3.9 mA <
3.75 mA
High 20.8 mA  21.75 mA
Table 2-2. Analog Output: NAMUR-Compliant Alarm Values vs. Saturation
Values
Level 4—20 mA Saturation Value 4—20 mA Alarm Value
Low 3.8 mA <
3.6 mA
High 20.5 mA  22.6 mA
Figure 2-6. LCD Indicator Alarm and Security Jumpers
ALARM
LO
HI
OFF
ON
SECURITY

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