Fisher 244EH, 244ER manual New Transmitter, Considerations HART Communicator Model 644H only

NEW TRANSMITTER

Transmitter Design

Sensor Wiring Diagrams

Special Mounting

Considerations

HART Communicator (Model 644H only)

Models 644H and 244EH Models 644R and 244ER

Captive Mounting Screws and Springs	244-1360A02B
Hole in Middle
of Transmitter
Meter Connector
(Model 644H only)
	644,

	Models 644 and 244E
1 2 3 4	1 2	3 4	1 2 3 4	1 2 3 4	1 2 3 4	-0000B01C
2-wire	3-wire * RTD with** 4-wire				T/C and
RTD	RTD		Comp.	RTD	mV
						644
and V	and V		Loop	and V

*Rosemount Inc. provides 4-wire sensors for all single element RTDs. You can use these RTDs in 3-wire configurations by leaving the unneeded leads disconnected and insulated with electrical tape.

**The transmitters must be configured for a 3-wire RTD in order to recognize an RTD with a compensation loop.

Use with an Existing DIN Plate Style Sensor
1. Secure the bottom of the mounting screw sleeve		Springs	0000A02B-
transmitter mounting screws to assembly
with pliers. Remove the mounting screws and
springs.
2. Once the springs are removed, use the new		Mounting	SENSORS
the transmitter to the DIN plate and connection	Mounting	and
head. (Optional snap rings (part number		Screws
	Screw
00644-4432-0001) are available to ease installation
	Sleeves
to the existing DIN plate style sensor.)
Use with an Existing Threaded Sensor Connection Head
To mount the new Models 644H or 244EH to the existing	Existing		5321A01A,-
threaded sensor connection head (former option code L1),
	Threaded Sensor
order the models 644H and 244EH retrofit kit (part number
	Connection Head
00644-5321-0010). The fit includes a new mounting
bracket and all associated hardware necessary to facilitate	Model 644H or
the installation of the Models 644H and 244EH into the	Model 244EH	Kit includes	644
existing head.
	replacement bracket		644-
		and screw

To guarantee proper transmitter functionality and communication, your Model 275 HART Communicator should contain device revision Dev v5 DD v2 or higher. To check software device revision,

1.Turn on the communicator.

2.Select 1 Off-line,1 New Configuration, Rosemount, 644 Temp

If you do not have this device revision, contact your local Rosemount representative for information on receiving an upgrade.

C-3