Emerson Rosemount 644h, Reference Manual

Page: 61 / 78

Reference Manual
00809-0100-4728, Rev HA
December 2002
A-11
Models 644H and 644R
Hardware Tag
• No charge
• Tagged in accordance with customer requirements
• Tags are adhesive labels
• Permanently attached to transmitter and enclosure if enclosure is ordered
• Character height is
1
/
16
-in (1.6 mm)
Software Tag
• No charge
• The transmitter can store up to 8 characters. If no characters are specified,
the first 8 characters of the hardware tag are the default.
Special Mounting Considerations
See “Mounting” on page A-8 for the special hardware that is available to:
• Mount a Model 644H to a DIN rail.
• Retrofit a new Model 644H to replace an existing Model 644H transmitter
in an existing threaded sensor connection head.
External Ground Screw Assembly
Specifying option code G1 to order the external ground screw assembly. It is
not necessary to order option code G1 for those approvals that include the
ground screw assembly, The table below identifies which approval options
include the external ground screw assembly.
Configuration
Unless specified, the transmitter will be shipped as follows:
Approval Type External Ground Screw Assembly Included?
E5, K5, I5, I6, C6, NA No–Order option code G1
N1, ED, E7, I1, N7, and I7 Yes
Sensor Type RTD, Pt 100 ( α =0.00385, 4-wire)
4 mA Value 0 °C
20 mA Value 100 °C
Damping 5 seconds
Output Linear with temperature
Failure/Saturation Modes High (21.75 mA) / Upscale (20.8 mA)
Line Voltage Filter 50 Hz
Tag See the Configuration Data Sheet – located in the
Models 644H and 644R Smart Temperature
Transmitters Product Data Sheet (document number
00813-0100-4728)