Rosemount 248 User manual

www.rosemount.com
¢00825-0100-4825[¤
HART
®
Quick Installation Guide
00825-0100-4825, Rev CA
February 2006
Rosemount 248
Rosemount 248 Transmitter and
Temperature Monitoring Assembly
Step 1: Configure (Bench Calibration)
Step 2: Mount the Transmitter
Step 3: Software Installation (248C only)
Step 4: Connect the Wiring
Step 5: Perform a Loop Test
Product Certifications
248C License Agreement
Start
Power Up Transmitter
Check Process Connections
Confirm Configuration
Loop Test
End
Safety Instrumented System
00825-0100-4825.fm Page 1 Wednesday, February 8, 2006 1:53 PM

Quick Installation Guide
00825-0100-4825, Rev CA
February 2006
Rosemount 248
© 2006 Rosemount Inc. All rights reserved. All marks property of owner.
IMPORTANT NOTICE
This installation guide provides basic guidelines for the
Rosemount
®
248. It does not provide instructions for detailed
configuration, diagnostics, maintenance, service, troubleshooting,
or installations. Refer to the Rosemount 248 reference manual
(document number 00809-0100-4825) for more instruction. The
manual and this QIG are also available electronically on
www.rosemount.com.
WARNING
Explosions could result in death or serious injury:
Installation of this transmitter in an explosive environment must be
in accordance with the appropriate local, national, and international
standards, codes, and practices. Please review the Hazardous
Locations Certifications for any restrictions associated with a safe
installation. In an Explosion-proof/Flame-proof installation, do not
remove the transmitter covers when power is applied to the unit.
Process leaks may cause harm or result in death
• Install and tighten thermowells or sensors before applying
pressure.
• Do not remove the thermowell while in operation.
Electrical shock can result in death or serious injury
• Avoid contact with the leads and terminals. High voltage that
may be present on leads can cause electrical shock.
Emerson Process
Management
Rosemount Inc.
8200 Market Boulevard
Chanhassen, MN USA
55317
T (US) [phone]
T (Intnl) [phone]
F [phone]
Emerson Process
Management Shared
Services Ltd.
Heath Place
West Sussex PO22 9SH
England
T 44 (1243) 863 121
F 44 (1243) 867 554
Emerson Process
Management Asia Pacific
Private Limited
1 Pandan Crescent
Singapore 128461
T (65) 6777 8211
F (65) 6777 0947
[e-mail]
00825-0100-4825.fm Page 2 Wednesday, February 8, 2006 1:53 PM

Quick Installation Guide
00825-0100-4825, Rev CA
February 2006
Rosemount 248
S TEP 1: C ONFIGURE (B ENCH C ALIBRATION )
The Rosemount 248 communicates using the 375 Field
Communicator (communication requires a loop resistance between
250 and 1100 ohms. Do not operate when power is below 12Vdc at
the transmitter terminal). Refer to the Rosemount 248 Reference
Manual (document number 00809-0100-4825) and the 375 Field
Communicator Reference Manual
(http://www.fieldcommunicator.com/suppmanu.htm) for more
information.
Connecting a HART Communicator
The Hand-held Communicator Field Device Revision Dev v1, DD v1 is
required for complete functionality.
Figure 1. Connecting a Communicator to a Bench Loop
Verify Transmitter Configuration
From the Home Screen, enter the HART Fast Keys listed below to
verify if the transmitter is configured correctly. This table contains the
minimum functions required for configuration. Refer to the Rosemount
248 Reference Manual (document number 00809-0100-4825) for a
complete list.
Communicator Functions HART Fast Keys
Sensor 1 Setup 1, 3, 2, 1, 2
Sensor Type 1, 3, 2, 1, 1
LRV (Lower Range Value) 1, 1, 6
URV (Upper Range Value) 1, 1, 7
250  ≤ R
L
≤ 1100 
Power Supply
HART Communicator
Rosemount 248 Transmitter
2
4
8
\
0
0
0
a
0
2
a
.
e
p
s
00825-0100-4825.fm Page 3 Wednesday, February 8, 2006 1:53 PM

Quick Installation Guide
00825-0100-4825, Rev CA
February 2006
Rosemount 248
S TEP 2: M OUNT THE T RANSMITTER
Mount the transmitter at a high point in the conduit run to prevent
moisture from draining into the transmitter housing.
Typical European and Asia Pacific Installation
Head Mount Transmitter with DIN Plate Style Sensor
1. Attach the thermowell to the pipe or process container wall. Install
and tighten the thermowell before applying process pressure.
2. Assemble the transmitter to the sensor. Push the transmitter
mounting screws through the sensor mounting plate and insert the
snap rings (optional) into the transmitter mounting screw groove.
3. Wire the sensor to the transmitter.
4. Insert the transmitter-sensor assembly into the connection head.
Thread the transmitter mounting screw into the connection head
mounting holes. Assemble the extension to the connection head.
Insert the assembly into the thermowell.
5. Slip the shielded cable though the cable gland
6. Attach a cable gland into the shielded cable.
7. Insert the shielded cable leads into the connection head through
the cable entry. Connect and tighten the cable gland.
8. Connect the shielded power cable leads to the transmitter power
terminals. Avoid contact with sensor leads and sensor connections.
9. Install and tighten the connection head cover. Enclosure covers
must be fully engaged to meet explosion-proof requirements.
A = Rosemount 248 Transmitter D = Transmitter Mounting Screws
B = Connection Head E = Integral Mount Sensor with Flying Leads
C = Thermowell F = Extension
A
D
B
C
EF
2
4
8
\
0
0
0
b
0
4
a
.
e
p
s
00825-0100-4825.fm Page 4 Wednesday, February 8, 2006 1:53 PM

Quick Installation Guide
00825-0100-4825, Rev CA
February 2006
Rosemount 248
S TEP 2 CONTINUED ...
Typical North and South American Installation
Head Mount Transmitter with Threaded Sensor
1. Attach the thermowell to the pipe or process container wall. Install
and tighten thermowells before applying process pressure.
2. Attach necessary extension nipples and adapters to the
thermowell. Seal the nipple and adapter threads with silicone tape.
3. Screw the sensor into the thermowell. Install drain seals if required
for severe environments or to satisfy code requirements.
4. Pull the sensor wiring leads through the universal head and
transmitter. Mount the transmitter in the universal head by
threading the transmitter mounting screws into the universal head
mounting holes.
5. Mount the transmitter-sensor assembly into the thermowell. Seal
adapter threads with silicone tape.
6. Install conduit for field wiring to the conduit entry of the universal
head. Seal conduit threads with silicone tape.
7. Pull the field wiring leads through the conduit into the universal
head. Attach the sensor and power leads to the transmitter. Avoid
contact with other terminals.
8. Install and tighten the universal head cover. Enclosure covers must
be fully engaged to meet explosion-proof requirements.
A = Threaded Thermowell D = Universal Head
B = Threaded Style Sensor E = Conduit Entry
C = Standard Extension
AB
C
D
E
2
4
8
\
0
0
0
a
0
4
a
.
e
p
s
00825-0100-4825.fm Page 5 Wednesday, February 8, 2006 1:53 PM

Quick Installation Guide
00825-0100-4825, Rev CA
February 2006
Rosemount 248
S TEP 2 CONTINUED ...
Mounting to a DIN Rail
Rail Mount Transmitter with Remote Mount Sensor
The least complicated assembly uses:
• a remote mounted transmitter
• an integral mount sensor with terminal block
• an integral style connection head
• a standard extension
• a threaded thermowell
Refer to the Metric Product Data Sheet (document number
00813-0101-2654) for complete sensor and mounting accessory
information.
To complete the assembly, follow the procedure described below.
1. Attach the transmitter to a suitable rail or panel.
2. attach the thermowell to the pipe or process container wall. Install
and tighten the thermowell before applying pressure.
3. Attach the sensor to the connection head and mount the entire
assembly to the thermowell.
4. Attach sufficient lengths of sensor lead wire to the sensor terminal
block.
5. Attach and tighten the connection head cover. Enclosure covers
must be fully engaged to meet explosion-proof requirements.
To attach the Rosemount 248H to
a DIN rail, assemble the
appropriate rail mounting kit (part
number 00248-1601-0001) to the
transmitter as shown.
Transmitter
Mounting Hardware
Rail Clip
2
4
8
\
2
4
8
_
0
6
a
.
e
p
s
00825-0100-4825.fm Page 6 Wednesday, February 8, 2006 1:53 PM

Quick Installation Guide
00825-0100-4825, Rev CA
February 2006
Rosemount 248
S TEP 2 CONTINUED ...
6. Run sensor lead wires from the sensor assembly to the transmitter.
7. Attach the sensor and power leads to the transmitter. Avoid contact
with leads and terminals.
Rail Mount Transmitter with Threaded Sensor
The least complicated assembly uses:
• a threaded sensor with flying heads
• a threaded sensor connection head
• a union and nipple extension assembly
• a threaded thermowell
Refer to Volume 1 of the Rosemount Sensors Product Data Sheet
(document number 00813-0100-2654) for complete sensor and
mounting accessory information.
To complete the assembly, follow the procedure described below.
1. Attach the transmitter to a suitable rail or panel.
Integral Mount Sensor with
Terminal Block
Connection Head
Standard Extension
Threaded Thermowell
Rail Mount Transmitter
Sensor Leads with
Cable Gland
2
4
8
\
0
0
0
c
0
4
a
.
e
p
s
00825-0100-4825.fm Page 7 Wednesday, February 8, 2006 1:53 PM

Quick Installation Guide
00825-0100-4825, Rev CA
February 2006
Rosemount 248
S TEP 2 CONTINUED ...
2. Attach the thermowell to the pipe or process container wall. Install
and tighten the thermowell before applying pressure.
3. Attach necessary extension nipples and adaptors. Seal the nipple
and adapter threads with silicone tape.
4. Screw the sensor into the thermowell. Install drain seals if required
for severe environments or to satisfy code requirements.
5. Screw the connection head to the sensor.
6. Attach the sensor lead wires to the connection head terminals.
7. Attach additional sensor lead wires from the connection head to the
transmitter.
8. Attach and tighten the connection head cover. Enclosure covers
must be fully engaged to meet explosion-proof requirements.
9. Attach the sensor and power leads to the transmitter. Avoid contact
with leads and terminals.
Rail Mount
Transmitter Threaded Sensor
Connection Head Threaded Style
Sensor Standard Extension Threaded
Thermowell
2
4
8
\
0
0
0
a
0
4
b
.
e
p
s
00825-0100-4825.fm Page 8 Wednesday, February 8, 2006 1:53 PM

Quick Installation Guide
00825-0100-4825, Rev CA
February 2006
Rosemount 248
S TEP 3: S OFTWARE I NSTALLATION (248C ONLY )
1. Install the 248C software
• Place the 248C CD-ROM in the drive
• Run setup.exe from Windows NT, 2000, or XP
2. HART interface Box (248C1 option): Connect the HART Interface
Box to PC and 248 transmitter per instructions located on the
HART Interface Box label
3. Install Serial HART modem (248C2 option) or USB HART modem
(248C3 option). Please see instructions accompanying modem
hardware.
4. For USB modem (248C3 option): Upoin first use, configure
appropriate COM ports within 248C software by selecting “Port
Settings” from the “Communicate” menu. The USB modem driver
emulates a COM port and will add to available port selections in the
software’s drop-down box. Otherwise software defaults to first
available COM port, which may not be correct.
S TEP 4: C ONNECT T HE W IRING
• Wiring diagrams are located on the top label of the transmitter.
• An external power supply is required to operate the transmitter.
• The power required across the transmitter power terminals is 12 to
42.4 V dc (the power terminals are rated to 42.4 V dc). To prevent
damaging the transmitter, do not allow terminal voltage to drop
below 12.0 V dc when changing the configuration parameters.
Power the Transmitter
1. Connect the positive power lead to the “+” terminal. Connect
the negative power lead to the “–” terminal.
2. Tighten the terminal screws.
3. Apply power (12 – 42 V dc).
00825-0100-4825.fm Page 9 Wednesday, February 8, 2006 1:53 PM

Quick Installation Guide
00825-0100-4825, Rev CA
February 2006
Rosemount 248
S TEP 4 CONTINUED ...
Figure 2. Power, Communication, and Sensor Terminals
Ground the Transmitter
Ungrounded Thermocouple, mV, and RTD/Ohm Inputs
Each process installation has different requirements for grounding.
Use the grounding options recommended by the facility for the specific
sensor type, or begin with grounding Option 1 (the most common).
Option 1 (for grounded housing):
1. Connect sensor wiring shield to the transmitter housing.
2. Ensure the sensor shield is electrically isolated from surrounding
fixtures that may be grounded.
3. Ground signal wiring shield at the power supply end.
+
_
Sensor Terminals
Power/Communication
Terminals
2
4
8
\
2
4
8
_
1
0
a
.
e
p
s
4–20 mA loop
Sensor Wires
Shield ground point
Transmitter
00825-0100-4825.fm Page 10 Wednesday, February 8, 2006 1:53 PM