Emerson Rosemount 2051 Reference Manual page 48

Configuration
March 2024
HART Communicator
Table 3-6: Fast keys
4–20 mA Fast Keys
1–5 Vdc Fast Keys
Enter the fast key sequence Set Process Variable Units. Select from the following engineering
units:
• inH
• inH
• ftH
• mmH
• mmHg
• psi
AMS Device Manager
Right-click on the device and select Configure Properties from the menu. In the Basic
Setup tab, use Unit drop-down menu to select units.
3.7.2 Set output (transfer function)
The Rosemount 2051 has two output settings: Linear and square root. Activate the square
root output option to make analog output proportional to flow. As input approaches zero,
the Rosemount 2051 automatically switches to linear output in order to ensure a more
smooth, stable output near zero (see
For 4–20 mA HART
the ranged pressure input. This allows accurate calibration near zero. Greater slopes would
cause large changes in output (for small changes at input). From 0.6 to 0.8 percent, curve
slope equals 42 (y = 42x) to achieve continuous transition from linear to square root at the
transition point.
Field Communicator
Table 3-7: Fast keys
4-20 mA Fast Keys
1-5 Vdc Fast Keys
AMS device manager
Right-click on the device and select Configure Properties from the menu.
Procedure
1. In the Basic Setup tab, use Xfer fnctn drop-down menu to select output, select
2. After carefully reading the warning provided, select Yes.
48
1, 3, 2
1, 3, 2
O • bar
2
• mbar
g
O • g/cm
2
O • kg/cm
2
• Pa
• kPa
output, the slope of the curve is unity (y = x) from 0 to 0.6 percent of
®
1, 3, 5
1, 3, 5
Apply.
• torr
• atm
2 • inH
2 • mmH
Figure 3-3).
Reference Manual
00809-0100-4101
O at 4 °C
2
O at 4 °C
2
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