Ametek Drexelbrook Impulse T Series User manual

A Leader in
Level Measurement
Installation and
Operating Instructions
Impulse® Series
2-Wire Guided Wave Radar
Level Measurement System with
TXXXX Series Electronics and
GWXX Series Guided Wave Sensors
Telephone: [phone]
E-mail: drexelbr[email protected]
Website: www.drexelbrook.com

AMETEK Drexelbrook makes no warranty of any kind with regard to the material contained in this
manual, including, but not limited to, implied warranties or fitness for a particular purpose. Drexelbrook
shall not be liable for errors contained herein or for incidental or consequential damages in connection
with the performance or use of material.
© Copyright AMETEK Drexelbrook

TXXXX-LM
Issue #10
Impulse® Series 2-Wire
Guided Wave Radar (TDR)
Level Measurement System with
TXXXX Series Electronics and GWXX Series

Contents

Table of Contents
Section 1: Introduction..................................................................................................................... 1
1.1 Product Overview ................................................................................................................ 1
1.2 Sensor System Selection Guide.......................................................................................... 2
1.3 System Specifications ........................................................................................................ 3
1.3 System Specifications (Continued) ..................................................................................... 4
1.4 Models Available - Electronics ............................................................................................ 5
Section 2: Installation .................................................................................................................... 11
2.1 Unpacking ......................................................................................................................... 11
2.2 Mounting the System ........................................................................................................ 11
2.3 Wiring the Signal Converter............................................................................................... 11
2.4 Installation Examples......................................................................................................... 12
2.5 Wiring the Transmitter........................................................................................................ 16
Section 3: 4-20 mA HART® Unit Configuration ........................................................................... 21
3.1 Display / Keypad Operation............................................................................................... 21
3.2 Display / Keypad Menu ..................................................................................................... 22
3.4 Configuration and Calibration With HRTWin™.................................................................. 30
3.5 Installing The RS232 Modem ............................................................................................ 31
3.6 Installing The USB Modem................................................................................................ 32
3.7 HRTWin™ Software........................................................................................................... 33
Section 4: Modbus Unit.................................................................................................................. 51
4.1 Description ........................................................................................................................ 51
4.2 Wiring for RS485................................................................................................................ 51
4.3 Display / Keypad Operation............................................................................................... 52
4.4 Display / Keypad Menu ..................................................................................................... 53
4.7 Data Points ........................................................................................................................ 63
4.8 Byte Ordering .................................................................................................................... 64
4.9 Enron Modbus ................................................................................................................... 64
4.10 Holding and input registers ............................................................................................... 65
4.11 Maximum registers ............................................................................................................ 65
4.12 Examples of Accessing Data in the Impulse ..................................................................... 65
4.13 Modbus Map ..................................................................................................................... 66
4.14 Integer (16 bit Signed) formats .......................................................................................... 67
4.16 Floating Point, 32 bit, 16 bits of data per register ............................................................. 69
Section 5: Supplementary Installation & Operating Instructions............................................... 73
5.1 General safety information................................................................................................. 73
5.2 Mechanical Installation ...................................................................................................... 75
5.3 Electrical connection ......................................................................................................... 79
5.4 The Terminal Compartment Cover..................................................................................... 79
5.5 Commissioning.................................................................................................................. 79
5.6 Service and maintenance .................................................................................................. 79
Section 6: Troubleshooting............................................................................................................ 80
6.1 Diagnostic Messages ........................................................................................................ 81
6.2 Troubleshooting ................................................................................................................ 81
6.3 Troubleshooting the Loop Connections. ........................................................................... 82
6.4 Telephone Assistance........................................................................................................ 84
6.5 Equipment Return / Warranty ............................................................................................ 84
6.6 Field Service ...................................................................................................................... 85
6.7 Equipment Return (Continued) .......................................................................................... 95
Section 7: Control Drawings.......................................................................................................... 86
7.1 FM / FMC Control Drawings.............................................................................................. 86
7.2 ATEX Control Drawings...................................................................................................... 89

Section 1

Introduction
1
Section 1
Section 1: Introduction
1.1 Product Overview
The 2-Wire Impulse® TDR Level Measurement System (LMS)
The Impulse Level Measurement System is designed to measure the
distance, level and volume of liquids and slurries. It can be operated on
storage and process vessels.
The Impulse LMS is comprised of:
• The 2-wire electronic signal converter or Modbus digital output module
• The sensor system
The signal converter can be removed from the sensor system under
process conditions, without loss of pressure or exposure to the process
material.
Impulse TDR Technology:
In Time Domain Reectometry (TDR) a high frequency pulse is generated
and transmitted along the sensor. Discontinuities caused by changes in the
electrical properties of the medium through which the pulse is travelling
or tank structures within the pulse area will produce reections which
are detected by the electronics. The time between the pulse transmission
and reection detection times the velocity of the pulse divided by 2 will
equal the distance to the product surface [d = (t2-t1)v/2].
Impulse TDR Technology:
Coaxial
7/8” (22 mm)
OD
Single rod/cable
12” min.
(305 mm)
4” min.
(100 mm)
2” min.
(51 mm)
ground rod
(welded to mounting)
Dual rod/cable
Figure 1 Sensor pulse width

Impulse™ Series
2
1.2 Sensor System Selection Guide
Single Flexible Cable & Single Rigid Rod Sensors:
Intended for use with liquids and slurries applications that meet the
following criteria:
• Dielectric constant: K > 1.9 - 10. When sensor is mounted within 3"-6"
(75-150mm) of ground reference. No mounting restrictions on K > 10.
• No physical obstructions within the electromagnetic pulse diameter of
12 inches (305 mm) from sensing element.
• Mounting nozzle ratio (height vs. diameter): 1:1
• For mounting nozzles greater than 1:1, a wave guide nozzel elimination
will be required.
• Measurement lengths limited to 50ft or less.
Twin Flexible Cable & Twin Rigid Rod Sensors:
Intended for use with liquids that do not bridge between the twin elements
to help avoid false reections from internal obstructions that may be near
the sensor and/or in stilling wells that meet the following criteria:
• Dielectric constant: K > 1.9
• No physical obstructions within the pulse diameter of 4 inches (100 mm) from
the sensing element
• Mounting nozzle ratio (height vs. diameter): 1:1
• Measurement lengths limited to 50ft or less
Rigid Coaxial Sensors:
Intended for use with non-coating, low viscosity liquids, and where the
mounting nozzles are in excess of a 1:1 ratio and meets the following
criteria:
• Dielectric constant: K > 1.4
• Internal obstructions close to, or touching the coaxial sensor
• Mounting nozzle ratio (height vs. diameter): no restriction
• Measurement lengths limited to 20 ft. (6 m) or less

Introduction
3
1.3 System Specifications
Input:
Power: 13-30 VDC, I.S. HART Version
14-30 VDC, X.P. HART Version
11-30 VDC, X.P. Modbus Version
Function: Time Domain Reflectometry (TDR)
Measured Values: Total Level and Volume
Min., Max. Measuring ranges: Single Rod 1 - 12 ft. (0.3 - 3.6 m)
Single Cable 1 - 50 ft. (0.3 - 15 m)
Coaxial 1 - 20 ft. (0.3 - 6 m)
Twin Rod 1 - 12 ft. (0.3 - 3.6 m)
Twin Cable 1 - 50 ft. (0.3 - 15 m)
Non Measurement Ranges:
Dead Zones Upper / Lower
K=2 - K=80
Single Rod 2” / 5" - 3" / 5” (50 / 125 - 75 / 125 mm)
Single Cable 2” / 5" - 3" / 5” (50 / 125 - 75 / 125 mm)
Coaxial 2” / 7" - 2" / 7” (50 / 175 - 50 / 175 mm)
Twin Rod 2” / 3" - 3" / 3” (50 / 75 - 75 / 75 mm)
Twin Cable 2” / 6" - 3" / 5” (50 / 150 - 75 / 125 mm)
Minimum Dielectric (K) Twin Rods, Twin Cables
Coaxial
Single Rod, Single Cable
K > 1.9
K > 1.4
K . 1.9 *
Output:
Output Signal: Output 1 Two-wire, 4 – 20 mA, HART, AMS (isolated)
Signal on Fault Current output selectable 3.7 mA or 22 mA
Maximum Load Resistive Vs -13 (I.S. version) or -14 (X.P. Version)
10.022 = Max. Loop Resistance
User Selectable Modbus or Digital Output
Performance Characteristics:
Measuring Accuracy Reference conditions 20°C +/- 5°C / 68°F +/- 9°F @ Atmospheric
pressure / 60% Relative Humidity
Liquids K > 10 / K < 10 +/- 3 mm / +/- 0.08” / +/- 5mm / +/- 0.16"
Resolution +/- 1 mm / +/- 0.04”
Response Time: Less than 1 second
Damping: 0 – 90 seconds
Operating Conditions:
Installation:
Start-up Time 40 seconds
Emission Angle 0°
Environment:
Ambient Temperature -30° to +70° C / -22° to +158°F
Storage Temperature -40° to +85° C / -40° to +185°F
* For media with dielectrics of 1.9 to 10, single sensing element sensors must be mounted within 3"-6" (75-150mm) from a ground
reference such as a tank wall.

Impulse™ Series
4
Electromagnetic Conforms to Directive 89/336/CEE
in conjunction with EN 61326 (1
+ 2)
Process:
Temperature Flange temperature -40°C to +200°C / -40°F to +392°F
Thermal shock resistance 100°C / min.
Pressure Operating Pressure -1 to 40 bar / -14.5 to 580 psig
Protection Category IP 67, NEMA 4,4X
Mechanical Data:
Material: Housing Aluminum, Powder Coated
Single rod 316SS, Hast. C
Single Cable 316SS
Double rod 316SS, Hast. C
Double Cable 316SS
Coaxial 316SS, Hast. C
Process fittings 316SS, Hast C
Gaskets PEEK Viton (-40°C to +200°C, / -40°F to 392°F),
Kalrez 6375 (-20°C to +200°C / -4°F to +
392°F) EPDM (-40° to 121°C) -40° to 250°F
Process Connections: Thread: ¾” NPT/BSP, 1” NPT/BSP, 1-1/2” NPT/
BSP,
Flange: 1” ANSI through 8” ANSI, 150# & 300#
ratings, DN 40 though DN 150, PN 40 & PN
16, others on request
Electrical Connections:
Cable Entry ¾” NPT, M20 X 1.5,
Terminals: 20 to 12 AWG wire
Terminal Output 1 I.S. / EEx ia 24 Vdc (13 to 30 Vdc) 19 VDC Required at 4mA
X.P. 24 Vdc (14 to 30 Vdc) 19 VDC Required at 4mA
Human Interface:
HRTWin PC Soware HART / PC interface module
required
P/N# 401-0700-042
Conguration Display with Keypad - Standard
UV Rated – Sunshield not required
2-line, 7-digit LCD Character height: 0.25”
top line, 0.36” bottom line
HRTWin PC Software Included for HART version
Modbus
Communication
RS-485 Interface RTU or ASCII Mode Multi Modbus data formats are available.
Integer, Long Integer, Floating Point, Enron,
16-bit, 32-bit, and more.
1.3 System Specifications (Continued)

Introduction
5
1.4 Models Available - Electronics
Technology
TImpulse TDR with standard display / keypad
T X XX 0
Safety Level
0
Electrical Connection
03/4" NPT
1M 20
Approvals
1FM / FMc IS (HART Only)
2FM / FMc XP (Modbus or HART)
3ATEX Ex ia (HART Only)
4ATEX Ex dia (Modbus or HART)
6FM / FMC IS with Dual Seal (HART Only)
7FM / FMC XP with Dual Seal (Modbus or HART)
Signal Output
124 VDC, 2-wire 4 - 20 mA, HART output
3 Modbus RS-485, 11-30VDC

Impulse™ Series
6
1.4.1 Models Available - Sensing Element
GW XX XXXXXXX X X
GW
Sensor Type & Material
B 1 5/16" (8 mm) OD Single Rod, Normal Duty Mounting, 316 SS
B 2 5/16" (8 mm) OD Single Rod, Normal Duty Mounting, Hast. C
B 3 5/16" (8 mm) OD Single Rod with "Tee", Normal Duty Mounting, 316SS
B 4 5/16" (8 mm) OD Single Rod with "Tee", Normal Duty Mounting, Hast. C
C 1 5/32" (4 mm) OD Single Cable, Normal Duty Mounting, 316SS
H X Wave Guide Nozzle Eliminator, 5/32” Cable
J X Adjustable Length, Wave Guide Nozzle Eliminator, 5/32” Cable
K X Wave Guide Nozzle Eliminator, 5/16” Rod
Q X Adjustable Length, Wave Guide Nozzle Eliminator, 5/16” Rod (Consult Factory)
Seals
1 PEEK / Viton
2 PEEK / Kalrez
3 PEEK / EPDM
Metal Wetted Parts - Mounting
B 316 SS
C Hast. C-276
Process Connection
A 0 3/4" NPT, 316SS
B 0 1" NPT, 316SS
B B 1", 150# RF 316/316L SST
B J 1", 150# RF Hast. C-276
C 0 1-1/2" NPT
C B 1", 300# RF 316/316L SST
C J 1", 300# RF Hast. C-276
D B 1-1/2", 150# RF 316/316L SST
D J 1-1/2", 150# RF Hast. C-276
E B 1-1/2", 300# RF 316/316L SST
E J 1-1/2", 300# RF Hast. C-276
F B 2", 150# RF 316/316L SST
F J 2", 150# RF Hast. C-276
G B 2", 300# RF 316/316L SST
G J 2", 300# RF Hast. C-276
H B 2-1/2", 150# RF 316/316L SST
I B 3", 150# RF 316/316L SST
I J 3", 150# RF Hast. C-276
J B 3", 300# RF 316/316L SST
J J 3", 300# RF Hast. C-276
K B 4", 150# RF 316/316L SST
K J 4", 150# RF Hast. C-276
L B 4", 300# RF 316/316L SST
L J 4", 300# RF Hast. C-276
M B 6", 150# RF 316/316L SST
M J 6", 150# RF Hast. C-276
N B 6", 300# RF 316/316L SST
N J 6", 300# RF Hast. C-276
2 B 8", 150# RF 316/316L SST
2 J 8", 150# RF Hast. C-276
3 B 8", 300# RF 316/316L SST
3 J 8", 300# RF Hast. C-276
Z Z Other Mountings - Consult Factory
Bottom Weight
0 No Weight
3 Weight, 3/4" dia. X 5" Long, 316SS, for 5/32" cable
4 Threaded end, 316SS
5 Turnbuckle, 316SS
6 Cable Clamps. 316SS (cable loop)
Probe Length (mm)
XXXXX Max length = 15240 mm (50 ft.)
P 316 SS - Silicone Free
Q Hast. C - Silicone Free
(Consult Factory)
GW XX XXXXXXX X X
GW
Sensor Type & Material
B 1 5/16" (8 mm) OD Single Rod, Normal Duty Mounting, 316 SS
B 2 5/16" (8 mm) OD Single Rod, Normal Duty Mounting, Hast. C
B 3 5/16" (8 mm) OD Single Rod with "Tee", Normal Duty Mounting, 316SS
B 4 5/16" (8 mm) OD Single Rod with "Tee", Normal Duty Mounting, Hast. C
C 1 5/32" (4 mm) OD Single Cable, Normal Duty Mounting, 316SS
H X Wave Guide Nozzle Eliminator, 5/32” Cable
J X Adjustable Length, Wave Guide Nozzle Eliminator, 5/32” Cable
K X Wave Guide Nozzle Eliminator, 5/16” Rod
Q X Adjustable Length, Wave Guide Nozzle Eliminator, 5/16” Rod (Consult Factory)
Seals
1 PEEK / Viton
2 PEEK / Kalrez
3 PEEK / EPDM
Metal Wetted Parts - Mounting
B 316 SS
C Hast. C-276
Process Connection
A 0 3/4" NPT, 316SS
B 0 1" NPT, 316SS
B B 1", 150# RF 316/316L SST
B J 1", 150# RF Hast. C-276
C 0 1-1/2" NPT
C B 1", 300# RF 316/316L SST
C J 1", 300# RF Hast. C-276
D B 1-1/2", 150# RF 316/316L SST
D J 1-1/2", 150# RF Hast. C-276
E B 1-1/2", 300# RF 316/316L SST
E J 1-1/2", 300# RF Hast. C-276
F B 2", 150# RF 316/316L SST
F J 2", 150# RF Hast. C-276
G B 2", 300# RF 316/316L SST
G J 2", 300# RF Hast. C-276
H B 2-1/2", 150# RF 316/316L SST
I B 3", 150# RF 316/316L SST
I J 3", 150# RF Hast. C-276
J B 3", 300# RF 316/316L SST
J J 3", 300# RF Hast. C-276
K B 4", 150# RF 316/316L SST
K J 4", 150# RF Hast. C-276
L B 4", 300# RF 316/316L SST
L J 4", 300# RF Hast. C-276
M B 6", 150# RF 316/316L SST
M J 6", 150# RF Hast. C-276
N B 6", 300# RF 316/316L SST
N J 6", 300# RF Hast. C-276
2 B 8", 150# RF 316/316L SST
2 J 8", 150# RF Hast. C-276
3 B 8", 300# RF 316/316L SST
3 J 8", 300# RF Hast. C-276
Z Z Other Mountings - Consult Factory
Bottom Weight
0 No Weight
3 Weight, 3/4" dia. X 5" Long, 316SS, for 5/32" cable
4 Threaded end, 316SS
5 Turnbuckle, 316SS
6 Cable Clamps. 316SS (cable loop)
Probe Length (mm)
XXXXX Max length = 15240 mm (50 ft.)
P 316 SS - Silicone Free
Q Hast. C - Silicone Free
0 0 Adjustable IL Mounting

Introduction
7
1.4.1 Models Available - Sensing Element (Continued)
GW XX XXXXXXX X X
GW
Sensor Type & Material
D 1 (7/8” 22 mm) Coaxial, 316SS
D 2 (7/8” 22 mm) Coaxial, Hast. C-276
Seals
1 PEEK / Viton
2 PEEK / Kalrez
3 PEEK / EPDM
Metal Wetted Parts - Mounting
B 316 SS
C Hast. C-276
Process Connection
A 0 3/4" NPT, 316SS
B 0 1" NPT, 316SS
B B 1", 150# RF 316/316L SST
B J 1", 150# RF Hast. C-276
C 0 1-1/2" NPT
C B 1", 300# RF 316/316L SST
C J 1", 300# RF Hast. C-276
D B 1-1/2", 150# RF 316/316L SST
D J 1-1/2", 150# RF Hast. C-276
E B 1-1/2", 300# RF 316/316L SST
E J 1-1/2", 300# RF Hast. C-276
F B 2", 150# RF 316/316L SST
F J 2", 150# RF Hast. C-276
G B 2", 300# RF 316/316L SST
G J 2", 300# RF Hast. C-276
H B 2-1/2", 150# RF 316/316L SST
I B 3", 150# RF 316/316L SST
I J 3", 150# RF Hast. C-276
J B 3", 300# RF 316/316L SST
J J 3", 300# RF Hast. C-276
K B 4", 150# RF 316/316L SST
K J 4", 150# RF Hast. C-276
L B 4", 300# RF 316/316L SST
L J 4", 300# RF Hast. C-276
M B 6", 150# RF 316/316L SST
M J 6", 150# RF Hast. C-276
N B 6", 300# RF 316/316L SST
N J 6", 300# RF Hast. C-276
2 B 8", 150# RF 316/316L SST
2 J 8", 150# RF Hast. C-276
3 B 8", 300# RF 316/316L SST
3 J 8", 300# RF Hast. C-276
Z Z Other Mountings - Consult Factory
Bottom Weight
0 No Weight
Probe Length (mm)
XXXXX Max length = 15240 mm (50 ft.)
P 316 SS - Silicone Free
Q Hast. C - Silicone Free

Impulse™ Series
8
1.4.1 Models Available - Sensing Element (Continued)
GW XX XXXXXXX X X
GW
Sensor Type & Material
E 1 5/32" (4 mm) OD Twin Cables, 316SS
Seals
1 PEEK / Viton
2 PEEK / Kalrez
3 PEEK / EPDM
Metal Wetted Parts - Mounting
B 316 SS P 316 SS - Silicone Free
Process Connection
C 0 1-1/2" NPT
F B 2", 150# RF 316/316L SST
F J 2", 150# RF Hast. C-276
G B 2", 300# RF 316/316L SST
G J 2", 300# RF Hast. C-276
H B 2-1/2", 150# RF 316/316L SST
I B 3", 150# RF 316/316L SST
I J 3", 150# RF Hast. C-276
J B 3", 300# RF 316/316L SST
J J 3", 300# RF Hast. C-276
K B 4", 150# RF 316/316L SST
K J 4", 150# RF Hast. C-276
L B 4", 300# RF 316/316L SST
L J 4", 300# RF Hast. C-276
M B 6", 150# RF 316/316L SST
M J 6", 150# RF Hast. C-276
N B 6", 300# RF 316/316L SST
N J 6", 300# RF Hast. C-276
2 B 8", 150# RF 316/316L SST
2 J 8", 150# RF Hast. C-276
3 B 8", 300# RF 316/316L SST
3 J 8", 300# RF Hast. C-276
Z Z Other Mountings - Consult Factory
Bottom Weight
9 Weight, 1-1/2" OD X 2" Long, 316SS
Probe Length (mm) Max length = 15240 mm (50 ft.)
XXXXX

Introduction
9
1.4.1 Models Available - Sensing Element (Continued)
GW XX XXXXXXX X X
GW
Sensor Type & Material
F 1 5/16" (8mm) OD Twin Rod, 316SS
F 2 5/16" (8mm) OD Twin Rod, Hast. C
Seals
1 PEEK / Viton
2 PEEK / Kalrez
3 PEEK / EPDM
Metal Wetted Parts - Mounting
B 316 SS
C Hast. C-276
Process Connection
C 0 1-1/2" NPT
F B 2", 150# RF 316/316L SST
F J 2", 150# RF Hast. C-276
G B 2", 300# RF 316/316L SST
G J 2", 300# RF Hast. C-276
H B 2-1/2", 150# RF 316/316L SST
I B 3", 150# RF 316/316L SST
I J 3", 150# RF Hast. C-276
J B 3", 300# RF 316/316L SST
J J 3", 300# RF Hast. C-276
K B 4", 150# RF 316/316L SST
K J 4", 150# RF Hast. C-276
L B 4", 300# RF 316/316L SST
L J 4", 300# RF Hast. C-276
M B 6", 150# RF 316/316L SST
M J 6", 150# RF Hast. C-276
N B 6", 300# RF 316/316L SST
N J 6", 300# RF Hast. C-276
2 B 8", 150# RF 316/316L SST
2 J 8", 150# RF Hast. C-276
3 B 8", 300# RF 316/316L SST
3 J 8", 300# RF Hast. C-276
Z Z Other Mountings - Consult Factory
Bottom Weight
0 No Weight
Probe Length (mm) Max length = 15240 mm (50 ft.)
XXXXX
P 316 SS - Silicone Free
Q Hast. C - Silicone Free

Section 2

Installation
11
Section 2
Section 2: Installation
2.1 Unpacking
Carefully remove the contents of the shipping carton and check each
item against the packing list before destroying or discarding any packing
material. If there is any shortage or damage, report this to the factory
immediately.
2.2 Mounting the System
The Impulse TDR LMS is designed for eld mounting, but it should
be mounted in a location as free as possible from vibration, corrosive
atmosphere, and any possibility of mechanical damage.
2.3 Wiring the Signal Converter
If the Impulse LMS is located in a hazardous environment, do not open
the enclosure cover or make/break any electrical connections without
rst disconnecting the electrical power at the source. Ensure that wiring,
electrical tting and conduit connections conform to local electrical codes
and Approval Agency Control Drawings for the specic location and
environment.
See gure Section 2.5 for the wiring diagram of the Impulse TDR signal
converter.
Connect the 2-wire input power / signal leads to the terminal block as
shown. It is highly recommended to use shielded twisted pair to minimize
noise. The shield (or drain) wire should be grounded at the power source
and left oating (un-connected) at the Impulse TDR signal converter.
For X.P. Modbus Installations, negative (-) loop must not exceed +5 Volts
above ground. Permanent Damage to Unit May Result From Voltage
Outside These Limits.

Impulse™ Series
12
2.4 Installation Examples
Nozzle Height is Less Than
the Inside Diameter
(Less than 1:1)
Nozzle Height is Less Than
the Inside Diameter
(Less than 1:1)
Nozzle Height is Less Than
the Inside Diameter
(Less than 1:1)
Nozzle Height is Less Than
the Inside Diameter
(Less than 1:1)
No Nozzles are preferred, as coating build-up
in nozzles can affect performance, or cause
measurement failure.
2.4.1 Nozzles
The ideal nozzle dimension is:
Long nozzles will create disturbances
For nozzles with a "Height to
I.D. Ratio" greater than 1:1, the
recommended solution is to use a
Wave Guide Nozzle Eliminator.
GW HX, JX, KX, QX, Options

Installation
13
Nozzle Height is Less Than
the Inside Diameter
(Less than 1:1)
The Sensing Element must not touch the nozzle
2.4.1 Nozzles (Continued)
Nozzle Height is Less Than
the Inside Diameter
(Less than 1:1)
Flexible Sensing Element cables must hang free and be taut
2.4.2 Mounting Considerations

Impulse™ Series
14
Nozzle Height is Less Than
the Inside Diameter
(Less than 1:1)
Nozzle Height is Less Than
the Inside Diameter
(Less than 1:1)
Do not mount in a ll stream
2.4.2 Mounting Considerations (Continued)
Do not mount in areas with internal obstructions