Emerson Rosemount 248 User manual

Quick Start Guide
00825-0200-4825, Rev EA
February 2021
Rosemount™ 248 Head Mount
Temperature Transmitter

Contents
About this guide...........................................................................................................................3
Configuration...............................................................................................................................5
Mount the transmitter..................................................................................................................7
Connect the wiring.....................................................................................................................11
Perform a loop test.....................................................................................................................16
Certified installations................................................................................................................. 17
Product certifications................................................................................................................. 18
Quick Start Guide February 2021
2

1 About this guide
This guide provides basic guidelines to install the Rosemount 248 Head
Mount Temperature Transmitter. It does not provide instructions for
detailed configuration, diagnostics, maintenance, service, troubleshooting,
or installations. Refer to the Rosemount 248 Temperature Transmitter
Reference Manual for more instruction. The manual and this guide are also
available electronically at Emerson.com/Rosemount.
1.1 Safety messages
WARNING
Explosions
Explosions could result in death or serious injury.
Installation of device in an explosive environment must be in accordance
with appropriate local, national, and international standards, codes, and
practices.
Review the Hazardous Locations Certifications for any restrictions
associated with a safe installation.
Process leaks
Process leaks could result in death or serious injury.
Install and tighten thermowells and sensors before applying pressure.
Do not remove the thermowell while in operation.
Electrical shock
Electrical shock could cause death or serious injury.
Avoid contact with the leads and terminals. High voltage that may be
present on leads can cause electrical shock.
Unless marked, the conduit/cable entries in the housing use a ½–14 NPT
thread form. Entries marked “M20” are M20 × 1.5 thread form. On
devices with multiple conduit entries, all entries will have the same
thread form. Only use plugs, adapters, glands, or conduit with a
compatible thread form when closing these entries.
When installing in a hazardous location, use only appropriately listed or
Ex certified plugs, glands, or adapters in cable/conduit entries.
February 2021 Quick Start Guide
Quick Start Guide 3

WARNING
Physical access
Unauthorized personnel may potentially cause significant damage to and/or
misconfiguration of end users’ equipment. This could be intentional or
unintentional and needs to be protected against.
Physical security is an important part of any security program and
fundamental to protecting your system. Restrict physical access by
unauthorized personnel to protect end users’ assets. This is true for all
systems used within the facility.
Quick Start Guide February 2021
4

2 Configuration
2.1 Bench calibration
There are three ways to configure the transmitter:
•Field Communicator
•Rosemount 248 PC Programming Kit
•Custom at the factory using the C1 option code
Refer to the Rosemount 248 Reference Manual and the Field Communicator
User Guide for more information.
Connecting a field communicator
The Field Communicator Field Device Revision Dev v1, DD v1or later is
required for complete functionality.
Figure 2-1: Connecting a Field Communicator to a Bench Loop
A. Rosemount 248 Transmitter
B. 250 Ω ≤ RL ≤ Ω 1100
C. Field Communicator
D. Power supply
E. Recorder (optional)
F. Ammeter (optional)
Note
Do not operate when power is below 12 Vdc at the transmitter terminal.
February 2021 Quick Start Guide
Quick Start Guide 5

2.2 Verify transmitter configuration
To verify operation using a Field Communicator, refer to the Rosemount 248
Reference Manual for more detailed description.
2.3 Install PC programmer kit (HART® 5 only)
Procedure
1. Install all necessary software for PC configuration:
a) Install the Rosemount 248C software
1. Place the CD-Rom in the drive.
2. Run setup.exe from Windows™ 7, 8, 10, or XP.
b) Install the MACTek® HART modem drivers completely before
beginning bench configuration with the Rosemount 248 PC
Programming system.
Note
For USB modem: Upon first use, configure appropriate COM ports
within the Rosemount 248 PC 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.
2. Set up configuration system hardware:
a) Hook up the transmitter and load resistor (250-1100 ohms)
wired in series with the power supply.
The device will need an external power supply of 12-42.4 Vdc
for configuration.
b) Attach the HART modem in parallel with the load resistor and
connect it to the PC.
2.3.1 Spares kit and re-order numbers
Table 2-1: Programming Kit Spare Part Numbers
Product description Part number
Programming software (CD) 00248-1603-0002
Rosemount 248 Programmer Kit - USB 00248-1603-0003
Rosemount 248 Programmer Kit - Serial 00248-1603-0004
For more information, refer to the Rosemount 248 Reference Manual.
Quick Start Guide February 2021
6

3 Mount the transmitter
3.1 Overview
Mount the transmitter at a high point in the conduit run to prevent moisture
from draining into the transmitter housing.
3.2 Typical European and Asia Pacific installation
Head mount transmitter with DIN plate style sensor
Procedure
1. Attach the thermowell to the pipe or process container wall. Install
and tighten thermowells before applying process pressure.
2. Assemble the transmitter to the sensor.
a) Push the transmitter mounting screws through the sensor
mounting plate.
3. Wire the sensor to the transmitter.
4. Insert the transmitter-sensor assembly into the connection head.
a) Thread the transmitter mounting screw into the connection
head mounting holes.
b) Assemble the extension to the connection head.
c) 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.
February 2021 Quick Start Guide
Quick Start Guide 7

Figure 3-1: Typical European and Asia Pacific Installation
A. Transmitter mounting screws
B. Rosemount 248 Transmitter
C. Integral mount sensor with flying leads
D. Connection head
E. Extension
F. Thermowell
3.3 Typical North and South American installation
Head mount transmitter with threaded sensor
Procedure
1. Attach the thermowell to the pipe or process container wall. Install
and tighten the thermowell before applying process pressure.
2. Attach necessary extension nipples and adapters to the thermowell.
3. 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. Pull the sensor wiring leads through the universal head and
transmitter.
6. Mount the transmitter in the universal head by threading the
transmitter mounting screws into the universal head mounting
holes.
7. Mount the transmitter-sensor assembly into the thermowell. Seal
adapter threads with silicone tape.
8. Install conduit for field wiring to the conduit entry of the universal
head. Seal conduit threads with silicone tape.
9. Pull the field wiring leads through the conduit into the universal
head.
10. Attach the sensor and power leads to the transmitter. Avoid contact
with other terminals.
11. Install and tighten the universal head cover.
Quick Start Guide February 2021
8

Note
Enclosure covers must be fully engaged to meet explosion-proof
requirements.
Figure 3-2: Typical North and South American Installation
A. Threaded thermowell
B. Standard extension
C. Threaded style sensor
D. Universal head
E. Conduit entry
3.4 Mounting to a DIN rail
Procedure
•To attach a head mount transmitter to a DIN rail, assemble the
appropriate rail mounting kit (part number 00248-1601-0001) .
Figure 3-3: Assembling Rail Clip Hardware
C
B
A
A. Mounting hardware
B. Transmitter
C. Rail clip
February 2021 Quick Start Guide
Quick Start Guide 9

3.4.1 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 Sensor Product Data Sheet for complete sensor and
mounting accessory information.
3.4.2 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 Rosemount Sensor Product Data Sheet for complete sensor and
mounting accessory information.
Quick Start Guide February 2021
10

4 Connect the wiring
4.1 Diagrams and power
•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
Vdc (the power terminals are rated to 42.4 Vdc).
Note
To prevent damaging the transmitter, do not allow terminal voltage to drop
below 12.0 Vdc when changing the configuration parameters.
4.1.1 Power the transmitter
Procedure
1. Connect the positive power lead to the “+” terminal.
2. Connect the negative power lead to the “–” terminal.
3. Tighten the terminal screws.
4. Apply power (12–42 Vdc).
Figure 4-1: Power, Communication, and Sensor Terminals
A. Sensor terminals
B. Power/communication terminals
4.1.2 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).
February 2021 Quick Start Guide
Quick Start Guide 11

4.1.3 Ground the transmitter: Option 1
Use this method for grounded housing.
Procedure
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.
Figure 4-2: Option 1: Grounded Housing
A
B
D
C
A. Sensor wires
B. Transmitters
C. DCS host system
D. Shield ground point
4.1.4 Ground the transmitter: Option 2
Use this method for grounded housing.
Procedure
1. Connect signal wiring shield to the sensor wiring shield.
2. Ensure the two shields are tied together and electrically isolated from
the transmitter housing.
3. Ground shield at the power supply end only.
4. Ensure the sensor shield is electrically isolated from the surrounding
grounded fixtures.
Quick Start Guide February 2021
12

Figure 4-3: Option 2: Grounded Housing
D
B
AC
A. Sensor wires
B. Transmitters
C. DCS host system
D. Shield ground point
4.1.5 Ground the transmitter: Option 3
Use this method for grounded or ungrounded housing.
Procedure
1. Ground sensor wiring shield at the sensor, if possible.
2. Ensure that the sensor wiring and signal wiring shields are electrically
isolated from the transmitter housing.
Do not connect the signal wiring shield to the sensor wiring shield.
3. Ground signal wiring shield at the power supply end.
February 2021 Quick Start Guide
Quick Start Guide 13

Figure 4-4: Option 3: Grounded or Ungrounded Housing
A
B
D
C
A. Sensor wires
B. Transmitters
C. DCS host system
D. Shield ground point
4.1.6 Ground the transmitter: Option 4
Use this method for grounded thermocouple inputs.
Procedure
1. Ground sensor wiring shield at the sensor.
2. Ensure that the sensor wiring and signal wiring shields are electrically
isolated from the transmitter housing.
Do not connect the signal wiring shield to the sensor wiring shield.
3. Ground signal wiring shield at the power supply end.
Quick Start Guide February 2021
14

Figure 4-5: Option 4: Grounded Thermocouple Inputs
A
B
D
C
A. Sensor wires
B. Transmitters
C. DCS host system
D. Shield ground point
February 2021 Quick Start Guide
Quick Start Guide 15

5 Perform a loop test
5.1 Overview
The loop test command verifies transmitter output, loop integrity, and
operation of any recorders or similar devices installed in the loop.
Note
This is not available with the Rosemount 248C Configuration Interface.
5.2 Initiate loop test
Procedure
1. Connect an external ampere meter in series with the transmitter loop
(so the power to the transmitter goes through the meter at some
point in the loop).
2. From the Home screen, select: 1. Device Setup → 2. Diag/Serv → 1.
Test Device → 1. Loop Test
3. Select a discrete milliampere level for the transmitter to output. At
Choose Analog Output, select 1. 4 mA, 2. 20 mA, or 3. Other to
manually input a value between 4 and 20 mA.
4. Select Enter to show the fixed output.
5. Select OK.
6. In the test loop, check that the fixed mA input and the transmitter’s
mA output are the same value.
Note
If the readings do not match, either the transmitter requires an
output trim or the current meter is malfunctioning.
After completing the test, the display returns to the loop test screen and
allows you to choose another output value.
5.3 End the loop test
Procedure
1. Select 5. End.
2. Select Enter.
Quick Start Guide February 2021
16

6 Certified installations
For Safety Certified installations, refer to the Rosemount 248 Reference
Manual. You can access this manual electronically at Emerson.com/
Rosemount or by contacting an Emerson representative.
February 2021 Quick Start Guide
Quick Start Guide 17

7 Product certifications
Rev: 1.7
7.1 European Directive information
A copy of the EU Declaration of Conformity can be found at the end of the
Quick Start Guide. The most recent revision of the EU Declaration of
Conformity can be found at Emerson.com/Rosemount.
7.2 Ordinary location certification
As standard, the device has been examined and tested to determine that the
design meets the basic electrical, mechanical, and fire protection
requirements by a nationally recognized test laboratory (NRTL) as accredited
by the Federal Occupational Safety and Health Administration (OSHA).
7.3 North America
The US National Electrical Code® (NEC) and the Canadian Electrical Code
(CEC) permit the use of Division marked equipment in Zones and Zone
marked equipment in Divisions. The markings must be suitable for the area
classification, gas, and temperature class. This information is clearly defined
in the respective codes.
7.4 USA
7.4.1 E5 USA Explosionproof and Dust-Ignitionproof
Certificate 1091070
Standards FM Class 3600-2011, FM Class 3611-2004, FM Class
3615-2006, FM 3616-2011, UL Std. No. 60079-0: Ed.6, UL Std.
No. 50E
Markings CL I/II/III, DIV 1, GP, B, C, D, E, F, G; when installed per
Rosemount drawing 00644-1059; Type 4X; IP66/68
7.4.2 I5 USA Intrinsic Safety and Nonincendive
Certificate 1091070
Standards FM Class 3600-2011, FM Class 3610-2010, FM Class
3611-2004, UL Std. No. 60079-0: Ed.6, UL Std. No. 60079-11:
Ed. 6, UL Std. No. 50E
Markings CL I/II/III, DIV 1, GP A, B, C, D, E, F, G; NI CL1, DIV 2, GP A, B, C,
D when installed per Rosemount drawing 00248-1056; Type
4X; IP66/68
Quick Start Guide February 2021
18

7.5 Canada
7.5.1 I6 Canada Intrinsically Safe
Certificate 1091070
Standards CAN/CSA C22.2 No. 0-10, CSA Std. C22.2 No. 25-1966,
CAN/CSA C22.2 No. 94-M91, CAN/CSA C22.2 No. 157-92, CSA
C22.2 No. 213-M1987, CAN/CSA C22.2 No. 60079-11:14,
C22.2 No 60529-05
Markings IS CL I, DIV 1 GP A, B, C, D when installed per Rosemount
drawing 00248-1056; CL I DIV 2 GP A, B, C, D; Type 4X,
IP66/68
7.5.2 K6 Canada Intrinsically Safe, Explosionproof, and Division 2
Certificate 1091070
Standards CAN/CSA C22.2 No. 0-10, CSA Std. C22.2 No. 25-1966, CSA
Std. C22.2 No. 30-M1986, CAN/CSA C22.2 No. 94-M91, CSA
Std. C22.2 No.142-M1987, CAN/CSA C22.2 No. 157-92, CSA
C22.2 No. 213-M1987, CAN/CSA C22.2 No. 60079-11:14,
C22.2 No 60529-05
Markings XP CL I/II/III, DIV 1, GP B, C, D, E, F, G when installed per
Rosemount drawing 00644-1059; IS CL I, DIV 1 GP A, B, C, D
when installed per Rosemount drawing 00248-1056; CL I DIV
2 GP A, B, C, D; Type 4X, IP66/68; Conduit Seal not required
7.6 Europe
7.6.1 E1 ATEX Flameproof
Certificate FM12ATEX0065X
Standards EN 60079-0: 2012+A11:2013, EN 60079-1: 2014, EN
60529:1991 +A1:2000 + A2:2013
Markings II 2 G Ex db IIC T6…T1 Gb, T6(-50 °C ≤ Ta ≤ +40 °C), T5…
T1(-50 °C ≤ Ta ≤ +60 °C)
See Table 7-2 for process temperatures.
Specific Conditions of Safe Use (X):
1. See certificate for ambient temperature range.
2. The non-metallic label may store an electrostatic charge and become
a source of ignition in Group III environments.
3. Guard the LCD display cover against impact energies greater than
four joules.
February 2021 Quick Start Guide
Quick Start Guide 19

4. Flameproof joints are not intended for repair.
5. A suitable certified Ex d or Ex tb enclosure is required to be connected
to temperature probes with Enclosure option "N".
6. Care shall be taken by the end user to ensure that the external
surface temperature on the equipment and the neck of DIN Style
Sensor probe does not exceed 266 °F (130 °C).
7. Non-standard paint options may cause risk of electrostatic discharge.
Avoid installations that cause electrostatic build-up on painted
surfaces and only clean the painted surfaces with a damp cloth. If
paint is ordered through a special option code, contact the
manufacturer for more information.
7.6.2 I1 ATEX Intrinsic Safety
Certificate Baseefa18ATEX0090X
Standards EN IEC 60079-0: 2018, EN 60079-11: 2012
Markings II 1 G Ex ia IIC T5/T6 Ga, T5(-60 °C ≤ Ta ≤ +80 °C), T6(-60 °C
≤ Ta ≤ +60 °C)
See Table 7-3 for entity parameters.
Special Condition for Safe Use (X):
The equipment, if supplied without an enclosure, must be installed in an
enclosure which affords it a degree of protection of at least IP20. Non-
metallic enclosures must have a surface resistance of less than 1G Ω; light
alloy or zirconium enclosures must be protected from impact and friction if
located in a Zone 0 environment.
7.6.3 N1 ATEX Zone 2 - with enclosure
Certificate Baseefa18ATEX0091X
Standards EN IEC 60079-0:2018, EN 60079-15:2010
Markings II 3 G Ex nA IIC T5/T6 Gc, T5(-60 °C ≤ Ta ≤ +80 °C), T6(-60
°C ≤ Ta ≤ +60 °C)
7.6.4 NC ATEX Zone 2 - without enclosure
Certificate Baseefa18ATEX0091X
Standards EN IEC 60079-0:2018, EN 60079-15:2010
Markings II 3 G Ex nA IIC T5/T6 Gc, T5(-60 °C ≤ Ta ≤ +80 °C), T6(-60
°C ≤ Ta ≤ +60 °C)
Quick Start Guide February 2021
20