Emerson Rosemount 3408 User manual

Quick Start Guide
00825-0100-4418, Rev AA
September 2022
Rosemount™ 3408 Level Transmitter
Non-Contacting Radar

Contents
About this guide...........................................................................................................................3
Confirm approval type..................................................................................................................5
Mount the process seal antenna...................................................................................................6
Mount the lens antenna............................................................................................................... 8
Mount the ATAP lens antenna.................................................................................................... 10
Rotate the transmitter housing.................................................................................................. 13
Prepare the electrical connections..............................................................................................14
Connect wiring and power up.....................................................................................................17
Configuration.............................................................................................................................22
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1 About this guide
This Quick Start Guide provides basic guidelines for the Rosemount 3408
Level Transmitter. Refer to the 3408 Reference Manual for more
instructions.
1.1 Safety messages
WARNING
Failure to follow safe installation and servicing guidelines could result in
death or serious injury.
Ensure the transmitter is installed by qualified personnel and in accordance
with applicable code of practice.
Use the equipment only as specified in this Quick Start Guide and the
Reference Manual. Failure to do so may impair the protection provided by
the equipment.
For installations in hazardous locations, the transmitter must be installed
according to the Rosemount 3408 Product Certifications document and
System Control Drawing.
Repair, e.g. substitution of components, etc. may jeopardize safety and is
under no circumstances allowed.
WARNING
Explosions could result in death or serious injury.
Verify that the operating atmosphere of the transmitter is consistent with
the appropriate hazardous locations certifications.
Before connecting a handheld communicator in an explosive atmosphere,
ensure the instruments are installed in accordance with intrinsically safe or
non-incendive field wiring practices.
In Explosion-proof/Flameproof and Non-Incendive/Type Ex ec installations,
do not remove the transmitter cover when power is applied to the unit.
The transmitter cover must be fully engaged to meet Explosion-proof/
Flameproof requirements.
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WARNING
Electrical shock could cause death or serious injury.
Ensure the mains power to the transmitter is off and the lines to any other
external power source are disconnected or not powered while wiring the
transmitter.
WARNING
Process leaks could result in death or serious injury.
Ensure that the transmitter is handled carefully. If the process seal is
damaged, gas might escape from the tank.
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.
CAUTION
Hot surfaces
The flange and process seal may be hot at high process temperatures. Allow
to cool before servicing.
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2 Confirm approval type
For hazardous locations transmitters labeled with multiple approval types:
Procedure
Permanently mark the checkbox of the selected approval type.
Figure 2-1: Label with Multiple Approval Types
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3 Mount the process seal antenna
3.1 Mount the flanged version
Procedure
1. Lower the transmitter into the nozzle.
Note
Be careful not to scratch or otherwise damage the PTFE sealing.
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2. Tighten the bolts and nuts (see Table 3-1).
Note
•Re-tighten after 24 hours and again after the first temperature
cycle.
•Check at regular intervals and re-tighten if necessary.
3.2 Torque specifications
The conditions used for the calculation are:
•Standard mating metal flange
•A193 B8M Cl.2 / A4-70 bolt material
•Friction coefficient of μ=0.16
Low strength bolt and non-metallic mating flange may require lower
tightening torque.
Table 3-1: Torque Values for Process Seal Antenna, lb-ft (N-m)
Process connection
size
Process connection rating
ASME B16.5 EN1092-1 JIS B2220
Class 150 Class 300 PN16 PN40 10K 20K
2-in./DN50/50A 29 (40) 52 (70) 26 (35) 29 (40) 18 (25) 37 (50)
3-in./DN80/80A 33 (45) 48 (65) 37 (50) 41 (55) 22 (30) 70 (95)
4-in./DN100/100A 59 (80) 52 (70) 37 (50) 74 (100) 26 (35) 74 (100)
6-in./DN150/150A 66 (90) 66 (90) 74 (100) 136 (185) 74 (100) N/A
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4 Mount the lens antenna
4.1 Mount on NPT threaded connections
Procedure
1. Apply anti-seize paste or PTFE tape on threads according to your site
procedures.
2. Mount the transmitter on the tank.
Example
•(A) Threaded fitting
•(B) Threaded flange
AB
46 mm / 50 mm
Note
Be careful not to scratch or otherwise damage the PTFE sealing.
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4.2 Mount on BSPP (G) threaded connections
Procedure
1. Place a suitable gasket on the tank nozzle.
Example
•(A) Threaded fitting
•(B) Threaded flange
A B
2. Mount the transmitter on the tank.
AB
46 mm / 50 mm
Note
Be careful not to scratch or otherwise damage the PTFE sealing.
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5 Mount the ATAP lens antenna
5.1 Open air installations
The antenna extension must be fitted to the transmitter to comply with
open air requirements.
Figure 5-1: Antenna Extension
5.2 Mount the bracket
Prerequisites
Mount the bracket so that it is not susceptible to vibration.
Procedure
1. Mount the bracket to the pipe/wall.
Example
14 mm
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2. Mount the adapter.
14 mm
3. Secure the transmitter to the adapter.
50 mm
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5.3 Mount on 1½-in. BSPP (G) threaded connections
Procedure
1. Place a suitable gasket on the tank nozzle.
Example
•(A) Threaded fitting
•(B) Threaded flange
A B
2. Mount the transmitter on the tank.
50 mm
AB
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6 Rotate the transmitter housing
To improve field access to wiring or to better view the optional LCD display:
Procedure
1. Loosen the set screw.
H2.5 mm
2. Rotate the transmitter housing to the desired location, and then
retighten the set screw.
H2.5 mm
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7 Prepare the electrical connections
7.1 Cable selection
Use 24-16 AWG wire (0.20-1.5 mm2). Twisted pairs and shielded wiring are
recommended for environments with high EMI (electromagnetic
interference).
Fine stranded conductors shall be equipped with a ferrule.
7.2 Cable gland/conduit
For explosion-proof/flameproof installations, only use cable glands or
conduit entry devices certified explosion-proof or flameproof.
7.3 Internal power consumption
< 0.8 W in normal operation
7.4 Grounding
Make sure grounding is done according to national and local electrical
codes. Failure to do so may impair the protection provided by the
equipment.
Transmitter housing
The most effective grounding method is direct connection to earth ground
with minimal impedance. There are two grounding screw connections
provided (see Figure 7-1).
Figure 7-1: Ground Screws
AB
A. Internal ground screw
B. External ground screw
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Cable shield grounding
Make sure the instrument cable shield is:
•Trimmed close and insulated from touching the transmitter housing.
•Continuously connected throughout the segment.
•Connected to a good earth ground at the power supply end.
Figure 7-2: Cable Shield
B
A
C
CC
D
A. Insulate shield and drain wire
B. Minimize distance
C. Trim shield and insulate exposed drain wire
D. Connect drain wire to the power supply ground
Note
Do not ground the shield and its drain wire at the transmitter. If the cable
shield touches the transmitter housing, it can create ground loops and
interfere with communications.
7.5 Power supply
The transmitter operates on max. 35 Vdc transmitter terminal voltage and
max. 22.5 mA (max. 30 Vdc in Intrinsically Safe installations).
7.6 Load limitations
For HART® communication, a minimum loop resistance of 250 Ω is required.
Maximum loop resistance (R) is determined by the voltage level of the
external power supply (UE):
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UE (Vdc) R (Ω)
≥ 15.6 R = 44.4 × (UE − 12)
< 15.6 R = 250 × (UE − 15)
Figure 7-3: Load Limits
12 35
24
0
200
400
600
800
1000
UE (Vdc)
532
250
162
1021
17.6
15.6
R (Ω)
7.7 Wiring diagram
Figure 7-4: 4-20 mA/HART® Communication
-
+
-
+
CF
D
B
A
E
A. Handheld communicator
B. Approved IS barrier (for Intrinsically Safe installations only)
C. HART modem
D. Load resistance (≥250 Ω)
E. Current meter
F. Power supply
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8 Connect wiring and power up
Procedure
1. Verify the power supply is disconnected.
2. Remove the cover.
3. Remove the LCD display (if fitted).
4. Remove the plastic plugs.
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5. Pull the cable through the cable gland/conduit.
Identification of thread size and type:
NPT M20
M20 x 1.5½-14 NPT
6. Connect the cable wires.
0.3 in. (8 mm)
Note
When connecting a flexible (stranded) conductor, use a small
screwdriver to press down and hold the terminal connection open.
7. Ensure proper grounding.
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8. Tighten the cable gland.
Apply PTFE tape or other sealant to the threads.
Note
Make sure to arrange the wiring with a drip loop.
9. Seal any unused port with the enclosed metal plug.
Apply PTFE tape or other sealant to the threads.
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10. Snap the LCD display into place.
11. Attach and tighten the cover.
a) Verify the cover jam screw is completely threaded into the
housing.
H2.5 mm
b) Attach and tighten the cover.
Note
Make sure the cover is fully engaged. There should be no gap
between the cover and the housing.
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