Emerson Process Management 2051 manual Humidity Limits Volumetric Displacement Damping, Rosemount

Rosemount 2051

Reference Manual

00809-0200-4101, Rev AA July 2008

Table A-3. 2051 Process Temperature Limits

Inert Fill Sensor(1)	0 to 185	°F (–18 to 85	°C)(2)
2051L High-Side Temperature Limits (Process Fill Fluid)
Syltherm® XLT	–100 to 300 °F (–73 to 149 °C)
D.C. Silicone 704®	32 to 400 °F (0 to 205		°C)
D.C. Silicone 200	–40 to 400 °F (–40 to 205 °C)
Inert	–50 to 350 °F (–45 to 177 °C)
Glycerin and Water	0 to 200	°F (–18 to 93	°C)
Neobee M-20®	0 to 400	°F (–18 to 205 °C)
Propylene Glycol and	0 to 200	°F (–18 to 93	°C)
Water

(1)Process temperatures above 185 °F (85 °C) require derating the ambient limits by a 1.5:1 ratio.

(2)220 °F (104 °C) limit in vacuum service; 130 °F (54 °C) for pressures below 0.5 psia.

(3)160 °F (71 °C) limit in vacuum service.

Humidity Limits

Volumetric Displacement

Damping

Failure Mode Alarm

0–100% relative humidity

Less than 0.005 in3 (0,08 cm3)

Analog output response to a step input change is user-selectable from 0 to

25.6seconds for one time constant. This software damping is in addition to sensor module response time.

If self-diagnostics detect a sensor or microprocessor failure, the analog signal is driven either high or low to alert the user. High or low failure mode is user-selectable with a jumper on the transmitter. The values to which the transmitter drives its output in failure mode depend on whether it is factory-configured to standard or NAMUR-compliant operation. The values for each are as follows:

Standard Operation

Output Code	Linear Output	Fail High	Fail Low
A	3.9 ≤ I ≤ 20.8	I ≥ 21.75 mA	I ≤ 3.75 mA
M	0.97 ≤ V ≤ 5.2	V ≥ 5.4 V	V ≤ 0.95V
NAMUR-Compliant Operation
Output Code	Linear Output	Fail High	Fail Low
A	3.8 ≤ I ≤ 20.5	I ≥ 22.5 mA	I ≤ 3.6 mA

Output Code F

If self-diagnostics detect a gross transmitter failure, that information gets passed as a status along with the process variable.

A-8