Mounting - Emerson Rosemount Reference Manual

Reference Manual
00809-0100-4021, Rev GC
Write protect switch (HART and F
The transmitter is equipped with a write-protect switch that can be positioned to prevent
accidental or deliberate change of configuration data.
Alarm switch (HART)
An automatic diagnostic routine monitors the transmitter during normal operation. If the
diagnostic routine detects a sensor failure or an electronics failure, the transmitter goes into
alarm (high or low, depending on the position of the failure mode switch).
The analog alarm and saturation values used by the transmitter depend on whether it is
configured to standard or NAMUR-compliant operation. These values are also custom-configu-
rable in both the factory and the field using the HART Communications. The limits are:


Table 2-1. Values for standard and NAMUR operation
Standard operation (factory default)
Fail High
High Saturation
Low Saturation
Fail Low
Simulate switch (F
Simulate switch is used to replace the channel value coming from the Sensor Transducer Block.
For testing purposes, it manually simulates the output of the Analog Input Block to a desired
value.
2.3

Mounting

If possible, the transmitter should be mounted at a high point in the conduit run so moisture
from the conduits will not drain into the housing. The terminal compartment could fill with
water if the transmitter is mounted at a low point in the conduit run. In some instances, the
installation of a poured conduit seal, such as the one pictured in
the terminal compartment cover periodically and inspect the transmitter for moisture and
corrosion.
Installation
21.0  I  23 for high alarm
3.5  I  3.75 for low alarm
21.75 mA  I  23.0 mA
I  20.5 mA
I  3.90 mA
I  3.75 mA
OUNDATION
fieldbus)
OUNDATION
NAMUR-compliant operation
21 mA  I  23.0 mA
Fail High
I  20.5 mA
High Saturation
I  3.8 mA
Low Saturation
I  3.6 mA
Fail Low
fieldbus)
Figure
Section 2: Installation
April 2014
2-4, is advisable. Remove
13