Reference Manual
00809-0100-4021, Rev FB
August 2011
Rosemount 3144P
A-6
Temperature Effects Example
When using a Pt 100 (
= 0.00385) sensor input with a 0 to 100 °C span at 30 °C ambient temperature, the
following statements would be true:
Digital Temp Effects
•
D/A Effects
(HART / 4–20 mA only)
•
Worst Case Error
• D D/A + Digital Temp E D/A Effects = 0.10 °C + 0.02 °C +
0.015 °C + 0.01 °C = 0.145 °C
Total Probable Error
HART / 4–20 MA
SPECIFICATIONS
Power Supply
External power supply is required. Transmitters operate on 12.0 to 42.4 Vdc
transmitter terminal voltage (with 250 ohm load, 18.1 Vdc power supply
voltage is required). Transmitter power terminals are rated to 42.4 Vdc.
Wiring Diagram
Alarms
Custom factory configurations of alarm and saturation levels are available for
valid values with option code C1. These values can also be configured in the
field using a Field Communicator.
Transient Protection (Option Code T1)
The transient protector helps prevent damage to the transmitter from
transients induced on the loop wiring by lightning, welding, heavy electrical
equipment, or switch gears. The transient protection electronics are contained
in an add-on assembly that attaches to the standard transmitter terminal
block. The external ground lug assembly (code G1) is included with the
Transient Protector. The transient protector has been tested per the following
standard:
• IEEE C62.41-1991 (IEEE 587)/ Location Categories B3.
6kV/3kA peak (1.2
50
S Wave 8
20
S Combination Wave)
6kV/0.5kA peak (100 kHz Ring Wave)
EFT, 4kVpeak, 2.5kHz, 5*50nS
• Loop resistance added by protector: 22 ohms max.
• Nominal clamping voltages: 90 V (common mode), 77 V (normal mode)
0.0015
C
C
-------
30
20
–
0.015
C
=
°
0.10
2
0.02
2
0.015
2
0.01
2
+
+
+
0.10
C
=
0.001
%
C
-------
x
Temperature Span
x
(
Amb Temp - Cal Temp)°
C
=DA Effect
0.001
%
C
-------
x
100°C
x
(30 - 20)°
C
= °C DA Effect
0.00001
°C
X100°C (30 - 20)°
x
C
=0.001°C DA
Aotewell Ltd
www.aotewell.com
Industry Automation
HongKong|UK|China
+86-755-8660-6182
