ACCU-FLO - LANDTEC North America

ACCU-FLO - LANDTEC North America
LANDTEC THERMAL GAS MASS FLOW METER
Operations and
Instruction Manual
For ACCU-FLO Models LIA and LRA
Make the Wise Choice.
Choose LANDTEC ACCU-FLO Meters.
LANDTEC
850 South Via Lata, Suite 112
Colton, CA 92324
Tel (800) 821-0496
Fax (909) 825-0591
www.landtecna.com
Operations and Instruction Manual
LANDTEC
3
Table of Contents
Introduction
Welcome . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
SECTION A
Getting Started
Unpacking Your LANDTEC Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Installation and Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Locating Proper Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Insertion Flow Meter Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
LANDTEC Valve Assembly Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Compression Fitting Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Installation Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Captive Flow Conditioners . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Probe Insertion Guideline Drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Installation Depth Chart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Large Duct or Stack Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
In-line Flow Meter Application. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Terminal Hookup ACCU-FLO Integral (Series LIA). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
24 VDC ACCU-FLO Integral Terminals Series LIA. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
AC Powered ACCU-FLO and DC Powered ACCU-FLO
Integral Terminals (Series LIA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Terminal Hookup ACCU-FLO Remote (Series LRA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
24 VDC ACCU-FLO Remote Terminals (Series LRA). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
AC Powered ACCU-FLO and DC Powered ACCU-FLO
Remote Series Terminals (Series LRA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Junction Box Wiring Terminals for Remote Style Meters . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
SECTION B
Specifications
Principle of Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Features and Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
LANDTEC ACCU-FLO Styles & Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
LANDTEC ACCU-FLO Organic (OLED) Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
SECTION C
Drawings
LIA Series Integral Style Flow Meters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
LRA Series Remote Style Flow Meters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Remote Bracket Layout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Mounting Hardware:
SVA05 Series Isolation Valve Assembly for Insertion Meters . . . . . . . . . . . . . . . . . . . . . . 38
STCF Series Teflon Ferrule Compression Fitting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
SVA05 Series Isolation Valve Assembly Detail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Mounting Plate for Thin Walled Ducts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
continued on next page
REV. 16-LIA/LRA
4
Operations and Instruction Manual
LANDTEC
SECTION C
Drawings
In-Line and Insertion Flanges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
SECTION D
Diagnostics
In-Situ Calibration Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
SECTION E
Warranties and Service Work
SVA05LP Low Pressure Isolation Valve Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Common Diagnostics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Limited Warranty. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Cancellation/Return Policy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Returning Your LANDTEC Flow Meter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Return Material Authorization Form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
SECTION F
Modbus
Modbus Register Listing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Modbus Protocol & Function Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
LANDTEC Register Output Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
LANDTEC Addresser Software . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
LANDTEC Addresser Typical Printout (Version 3.14) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
SECTION G
Appendix
LANDTEC ACCU-FLO™ Field Programmable “Dongle” . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Correction Factors For Varying Gas Mixes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Installations Where Pipe Condensation May Develop. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
J-Box and Upstream Orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
What Is a Thermal Mass Flow Meter?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
REV. 16-LIA/LRA
Operations and Instruction Manual
5
Welcome
We are pleased that you have purchased a LANDTEC Mass Flow Meter for your requirement. We
hope that you are satisfied with the performance, operation and design of our highly precise, NIST
traceable Thermal Gas Mass Flow Meter.
LANDTEC is your source for monitoring, measuring and controlling the gas mass flow in your
industrial process, building management system or environmental application. Our high performance,
NIST Traceable,Thermal Mass Flow Meters will help increase productivity, reduce energy costs,
maximize product yields, and/ or help reduce environmental insult. LANDTEC provides high quality InLine and Insertion Thermal Mass Flow Meters for a wide variety of industrial, commercial, and
environmental monitoring needs, including carbon credit verification for Greenhouse Gas reduction.
LANDTEC Flow Meters measure mass flow directly — there is no need for ancillary instrumentation
such as temperature or pressure transmitters. Furthermore, our instruments have exceptional signal
sensitivity, have no moving parts, require little if any maintenance, have negligible pressure drop and
have a turndown up to 100 to 1, and resolve as much as 1000 to 1. LANDTEC Flow Meters can
measure the mass flow rate and consumption of air, oxygen, natural gas, nitrogen, digester gas,
biogas, flare gas, hydrogen, argon, carbon dioxide and other gases and gas mixes.
The ACCU-FLO Meter is the latest addition to our family of high performance Thermal Mass Flow
Meters. It features a bright graphical display of Flow Rate,Total and Temperature, robust industrial
enclosure, and easy to access power and output terminals. LANDTEC ACCU-FLO meter has a dualcompartment windowed enclosure featuring a very high contrast photo-emissive OLED display with a
new photocell activated Screen Saver. The rear compartment, which is separated from the
electronics, has large, easy to access and well marked terminals, for ease of customer wiring. It is
powered by 24 VDC (12 VDC optional, or 115/230 VAC). The power dissipation is under 2.5 watts (e.g.
under 100 ma at 24 VDC for the DC version.)
Please let us know if we can assist you in any way with your LANDTEC Flow Meter, or if you have any
questions about its installation, operation, or features. Simply phone us at 800-LANDTEC, or visit our
website at WWW.LANDTECNA.COM.
REV. 16-LIA/LRA
Section
A
GETTING STARTED
LANDTEC
Operations and Instruction Manual
9
Getting Started
UNpACkING YOUR LANDTEC METER
to avoid damaging the sensor elements (the RTDs). If any
Your LANDTEC flow meter is a sensitive, yet rugged,
In general, it is recommended that your LANDTEC Thermal
precision built electronic instrument. Upon delivery, care
should be taken when opening the shipping container and
disassembly is necessary, contact LANDTEC for instructions.
Mass Flow Meter be returned to the factory if cleaning,
repair, or recalibration is needed. This is usually the most
removing your meter. The meter should be inspected for any
cost-effective and reliable alternative.
found, please contact the carrier immediately to place a
claim for damaged goods. The contents of the container
CALIBRATION
should be checked against the packing list for any
discrepancies. If there are any questions as to the contents
LANDTEC ACCU-FLO Meter has continuous diagnostics. The
or configuration of the equipment including calibration
raw calibration milliwats (mw) is always displayed in the
upper left hand corner of the meter's display. At any time,
possible. Please save shipping container and packaging
compare the reading to the original reported “zero flow”
damage that may have occurred during transit. If damage is
ranges, or, mounting hardware, contact LANDTEC as soon as
materials (including PVC tube probe protector on LANDTEC
Insertion Flow Meters) in case the unit needs to be returned
for any reason.
you can check this reading at a “no flow” condition and
value noted on the last few lines of your meter’s Certificate
of Conformance or the flow meter’s data tag. This diagnostic
procedure not only checks the sensor performance and the
“live zero” calibration point, but it verifies that the sensor is
MAINTENANCE
clean. It essentially provides a means to validate the meter’s
LANDTEC thermal mass flow meters essentially require little
eliminates the need for annual factory calibrations. This
resistant to dirt and particulate build up, it may become
is free from contamination, even without inspection. See “In-
or no maintenance. While the sensing element is somewhat
necessary to clean it from time to time if mounted in
extremely dirty environments. NOTE: ALWAYS REMOVE THE
performance, verifies that there is no shift or drift, and
simple field diagnostic procedure also verifies that the sensor
Situ Calibration Check” on page 46.
POWER PRIOR TO ANY CLEANING OR MAINTENANCE. A
detergent or appropriate non-corrosive solvent for removing
the buildup may be required. A soft brush can be used
to gently clean the sensing element’s surface, using caution
!
!
!
CAUTION cable glands shipped with unit are for shipping purposes only.
Remove shipping cable glands before installing.
CAUTION If installing in a Class I hazardous location the installation
must comply with appropriate electrical codes.
CAUTION Installer must supply proper ground and bond wire for the
transmitter and the sensor per appropriate electrical codes
REV. 16-LIA/LRA
10
LANDTEC
INSTALLATION AND MOUNTING
n
Check the Certificate of Conformance included with your
LANDTEC Thermal Mass Flow Meter for
system pressure, temperature, gas composition, power
input, and signal output.
n
It is recommended that the flow meter be inserted in a
location of maximum straight run. It is suggested that there
be a minimum of 15 pipe diameters of straight run
upstream, and 5 diameters downstream, depending on the
describe the basic model that you have. Refer to the
appropriate page numbers below for your wiring diagram
2) LIA: see page 19
3) LRA: see page 22 for input/output terminals;
see page 24 (Junction Box Wiring Terminals
for Remote Style Meters)
require additional straight run (contact factory for
wiring. CAUTION: Do not open the display side!
Follow the instructions below to remove the rear cap for
Check the orientation1: Standard calibration flow direction
Before removing the rear cap to access the wiring
direction is marked with an arrow on in-line flow meters;
assembly on the side of the rear enclosure to free up the
is left to right when facing the flow meter. Gas flow
UPSTREAM is marked on insertion probes.
Do not rotate probe1, or errors may occur. If enclosure is
facing incorrectly, rotate the enclosure 180˚, but do not
rotate the probe. The UPSTREAM mark still needs to be
facing Upstream.
n
1) Look at the sticker on your meter. The first three digits
WIRING
assistance).
n
LOCATING pROpER WIRING DIAGRAM
conditions. See chart on page 11. Note, obstructions such
as valves, blowers, expanders and PVC and HDPE pipes will
n
Operations and Instruction Manual
Hook up the system per the wiring diagram provided with
your LANDTEC flow meter (see inside of rear compartment
cover for terminal designation). Double check that wiring
terminals it is essential to completely remove the screw
threads so the lid can be removed. Note there is a Red Tag
attached to the screw assembly stating “Remove Screw
Before Opening Lid”. After the wiring is completed (see
pages 18 to 23 for wiring details), please close the lid, and
reinsert the screw assembly in the same manner.
Note: See “Approvals” page for Hazardous Location
Approvals (DC Powered Meters Only)
for the proper power and signal connections are correct.
n
Check that all plumbing and electrical hook-ups are in
accordance with OSHA, NFPA, and all other safety
requirements.
n
For Remote Style Meters (LRA) be sure the Remote
Electronics is matched with the Transmitter’s Junction Box
and its attached Probe or Flow Body. There will be Metal
Serial Number Tags
on both the Transmitter as well as the Remote Electronics
enclosure. Do not mismatch the serial numbers of the
Remote Electronics and the Junction Box, or calibration
errors will occur.
REV. 16-LIA/LRA
1 The Integral Style of LANDTEC ACCU-FLO Insertion Meters have the Display oriented as shown on page
14. If an alternate orientation of the display, or enclosure is required (ie. installation into a vertical
pipe), please furnish a sketch or drawing, and specify “ROTATE” on purchase order. However, if it is
later determined that the enclosure needs to be rotated, that procedure can be done in the field.
However, if the display needs to be rotated, then the meter must be sent back to LANDTEC to be
modified. Do not attempt this in the field. An RMA will be required prior to returning the meter (see
page 51). The procedure for rotating the enclosure is as follows: Clamp the enclosure of the ACCU-FLO
in a vise with the probe pointing up to the ceiling. Then take a 7/8 wrench and turn the probe to the
proper orientation. Lock the probe into its new position with a set screw (not provided).
11
LANDTEC
Operations and Instruction Manual
Insertion Flow Meter Application
FLOW pROFILE AND INSTALLATION
CONSIDERATIONS
Insertion Flow Meters, although generally easier to install
that In-Line Flow Meters, require proper installation, and a
well developed flow profile, in order to perform properly.
Please refer to the section on the following pages titled
PROBE INSERTION GUIDELINE DRAWING (page 14) and
INSTALLATION DEPTH CHART (page 15).
LANDTEC VALVE ASSEMBLY OpERATION
Valve assemblies (SVA05 and SVA05LP) are an optional
mounting hardware for Insertion Style Flow Meters (see
pages 38 and 39). They allow the removal of insertion-style
meters for service, cleaning, recalibration, relocation, etc.
without the need to “shut-down” your process. The probe
insertion depth is adjustable to permit sensor to be located
at center to optimize measurement accuracy. (Refer to
PROBE INSERTION GUIDELINE DRAWING and CHART, pages 14
& 15.) The ball valve will seal off leaks of the process gas at
the point of insertion after the probe assembly has been
threading together (or with necessary bushings) of the
retractor assembly may be required. In other cases, the
threadolet must be welded in place and a clearance hole
must be drilled through the pipe/ duct to accept the probe
assembly. If the pipe/duct is under pressure during
installation, a hot tap drill (not available through LANDTEC)
may be required.
FLOW CONDITIONING AND STRAIGHT RUN
Although a minimum of 15 pipe diameters of upstream
straight run is commonly recommended, to absolutely assure
that the flow profile is well developed at the point of
measurement, either use Flow Conditioners (standard in
LANDTEC In-Line Flow Meters, 1/2" and larger, and also
available as assemblies for Insertion Flow Meters, see page
13), or consider additional straight run. The Chart below
provides examples of the amount of straight run
that would virtually assure that there are no flow
disturbances at the point of measurement.
removed. The assembly includes a valve, threadolet,
compression fitting with Teflon ferrule, a cable restraint, and
two collar clamps.
A threaded half coupling (3/4" FNPT) properly sized to
accommodate the isolation valve retractor assembly must be
fitted to the pipe/duct to which the insertion probe will be
inserted. Avoid T-Fittings since they will disturb the flow
profile, and effectively reduce the measurement area. Direct
NOTE:
Detailed
Drawings
are shown
on pages
38 & 39.
IMPORTANCE OF FLOW CONDITIONING
Recommended Pipe Diameters Upstream
WITHOUT
FLOW CONDITIONING
WITH FLOW
CONDITIONING1
Minimum Industry
Recommendation
LANDTEC
Recommendation
One 90˚ Elbow
15
3
Two 90˚ Elbows
in the same plane
20
5
Two 90˚ Elbows
in different planes
At least 40
9
4:1 Area Reduction
15
3
4:1 Area Expansion
At least 30
10
Multiple Disturbance
To Be Determined
TBD
DIsTURBANCE
1 This column applies to In-Line Flow Meters, which come standard with built-in Flow Conditioners, as well as Insertion Meters,
when provided with upstream Captive Flow Conditioners (see page 13).
REV. 16-LIA/LRA
12
LANDTEC
Operations and Instruction Manual
COMpRESSION FITTING OpERATION
INSTALLATION INSTRUCTIONS
A bored through tube fitting, properly sized to accommodate
1. Insert tubing into the tube fitting.
an insertion probe’s particular OD, can be provided by the
user or purchased as an option from LANDTEC (see page 38).
Prior to installation, a clearance hole to accommodate the
insertion probe assembly must be drilled in the pipe/duct. A
fitting (1/2" FNPT) is then welded in place or threaded into
the half-threadolet which has been welded to the pipe/duct.
The probe insertion depth is adjustable to permit sensor to
be located at center, to optimize measurement accuracy.
(Refer to PROBE INSERTION GUIDELINE DRAWING and
CHART, pages 14 & 15.)
2. Make sure that the tubing is positioned properly per the
PROBE INSERTION GUIDELINE DRAWING AND CHART,
pages 14 & 15.
3. Due to the variations of tubing diameters, a common
starting point is desirable. Therefore, tighten the nut
until the tubing will not turn by hand or move axially in
the fitting.
4. Scribe the nut at the 6 o’clock position.
5. While holding fitting body steady, tighten the nut 11⁄4
turns to the 9 o’clock position.
Insert the probe shaft tubing into the
compression fitting to the position indicated
in the Probe Insertion guidelines.
While holding the fitting body steady,
tighten the nut one and one-quarter
turns to the 9 o’clock position.
REV. 16-LIA/LRA
LANDTEC
Operations and Instruction Manual
CApTIVE FLOW CONDITIONERS
Can Be Installed in Conjunction with Insertion Style Flow Meters
IMPORTANT The location of the probe must be exactly one pipe ID diameter (i.e., 4” in a 4” pipe; 6” in
a 6” pipe, etc.) downstream of the Captive Flow Conditioning assembly. The Captive Flow Conditioners
are always designed to be separated by one pipe diameter. See drawing below. The probe location must
be one pipe ID diameter downstream of Flow Conditioner, or errors will occur.
One Pipe
Diameter
Note: See table on page 11
(last Column) for Straight Run
Requirement
Largest of the
Two Perforated
Plates
Straight Run Requirement
from this Flange
Front View of one of the Conditioning Plates
One Pipe
Diameter
FLOW
ANSI Class Flanges
(user supplied)
Gaskets
Flow Conditioning
Assembly is
inserted here.
NOTE: The larger of the two perforated plates of the
LANDTEC Flow Conditioning assembly is positioned between
two flanges and two gaskets as shown. The smaller of the two
perforated plates of the conditioner will freely slide into the
application pipe, facing downstream. The probe mounting
hardware will be placed one diameter downstream of the
downstream plate. Probe location must be one pipe ID
diameter downstream of Flow Conditioners or errors will
occur.
13
14
LANDTEC
pROBE INSERTION GUIDELINE DRAWING1
Choose the longest straight-run section of pipe available to
allow a uniform, well-developed flow profile. Allow for a
minimum of 15 pipe diameters of straight run upstream, and
5 diameters downstream, depending on the conditions. See
chart on page 11. Note, obstructions such as valves, blowers
expanders and PVC and HDPE pipes will require additional
straight run (contact factory for assistance). Avoid, if
possible, installations immediately downstream of bends,
fans, nozzles, heaters and especially valves, or anything else
installed in the line that may cause nonuniform flow profiles
and swirls. Otherwise signal output errors could result,
unless significantly more straight run is provided, or in the
absence of sufficient straight run, Flow Conditioners (page 13)
are installed (contact LANDTEC for assistance if needed).
Refer to page 13 to see the benefits of incorporating Flow
Conditioners.
Insertion styles are available through LANDTEC with a
Operations and Instruction Manual
assembled and calibrated for use in virtually any size pipe or
duct (as small as 1”). LANDTEC insertion flow meters include
a probe assembly that supports the sensing element (a selfheated flow sensor and a temperature/reference sensor); a
sensor drive circuit; microprocessor meter board, and trans-
mitter enclosure. The probe assembly must be inserted into
the correct position in the process gas flow conduit to allow
the gas to flow through the sensor “window” across the
sensor element. The “sensing point” or active part of the
sensor (0.5" from the end of the probe) should be positioned
as per the drawing below and the Installation Depth Chart on
page 15.
Installation Depth
The center of the pipe (assuming a well developed turbulent
flow profile) is fairly flat, and easy to locate. See “Installation
Depth Chart” on next page to determine proper insertion
depth.
standard 1/2" OD probe support assembly; 3/4" is also
available. Standard probe lengths
are 6", 12", 15", 18", 24", 30", 36" and 48". A common
method of mounting the probe assembly through
LANDTEC
88mW
13546
a pipe wall or duct (if ambient air) is with a compression
467469670
˚
84 F
SCFM
SCF
ACCU-FLO
fitting (STCF05). A LANDTEC valve assembly (SVA05) is useful
and highly recommended for pressurized applications or
other gases, such as Natural Gas. Flange
mounting is optionally available.
LANDTEC insertion style flow meters can be
Z
4" PIPE SHOWN
Y
Center
of Pipe
X
REV. 16-LIA/LRA
LESS THAN IDEAL LOCATION
GOOD LOCATION2,3
Contact Factory for Assistance
(See Installation Depth Chart for X and Y Dimension)
1. LIA Industrial Meter shown in drawing. Note, probe is not bi-directional.
2. Probe should be inserted per Installation Depth Chart (see following page),
so sensors are in the center of the pipe.
3. The portion of the probe that remains outside of the pipe, is simply the factory
ordered probe length (i.e. “-15” = 15 inches) minus the “Y” dimension.
15
LANDTEC
Operations and Instruction Manual
INSTALLATION DEpTH CHART
Methods for probe Insertion to pipe Center
METHOD 1
METHOD 2
determine X. Insert probe until the end touches the bottom
determine Y. Subtract Y from the factory supplied probe
Using charts below1, select pipe size (column 1),
Using charts below, select pipe size (column 1),
length. That difference Z (see drawing on page 14) should be
of the pipe (ID), mark probe as it exits top
outside of the pipe, and is measured from the bottom of the
of fitting. Lift probe distance “X” and tighten compression
enclosure of the probe weld to pipe OD.
fitting.
1 For other Pipe Schedules, such as Schedule 10, contact LANDTEC, however the Y dimension
will be the same for any Schedule Pipe
2 The 1" Pipe Size needs to have the Probe “Bottomed Out” (option “BOT"); the calibration
method for the 11⁄2 " Pipe is either as shown below, or with option “BOT”
S C H E D U L E 4 0 P I P E2
PIPE SIZE
1"
OD
C
O
ID
N
S
U
X
L
T
SCHEDULE 80 PIPE
Y
F
A
C
PIPE AREA
T
O
R
Y
PIPE SIZE
1"
OD
C
O
ID
N
S
U
X
L
T
2
Y
F
A
C
PIPE AREA
T
O
R
Y
1.5"
1.900
1.610
.20"
1.56"
0.0141
1.5"
1.900
1.500
.15"
1.56"
0.0123
2"
2.375
2.067
.40"
1.82"
0.0233
2"
2.375
1.939
.35"
1.82"
0.0205
2.5"
2.875
2.469
.60"
2.07"
0.0332
2.5"
2.875
2.323
.55"
2.07"
0.0294
3"
3.500
3.068
.90"
2.38"
0.0513
3"
3.500
2.900
.80"
2.38"
0.0459
4"
4.500
4.026
1.40"
2.86"
0.0884
4"
4.500
3.826
1.30"
2.86"
0.0798
6"
6.625
6.065
2.40"
3.95"
0.2006
6"
6.625
5.761
2.25"
3.95"
0.1810
8"
8.625
7.981
3.40"
4.90"
0.3474
8"
8.625
7.625
3.25"
4.90"
0.3171
10"
10.750
10.020
4.40"
6.00"
0.5476
10"
10.750
9.750
4.25"
6.00"
0.5185
12"
12.750
11.938
5.50"
7.00"
0.7773
12"
12.750
11.374
5.13"
7.00"
0.7056
14"
14.000
13.124
6.00"
7.50"
0.9394
14"
14.000
12.500
5.70"
7.50"
0.8522
16"
16.000
15.000
7.00"
8.60"
1.2272
16"
16.000
14.312
6.60"
8.60"
1.1172
18"
18.000
16.876
8.00"
9.60"
1.5533
18"
18.000
16.124
7.50"
9.60"
1.4180
24"
24.000
22.625
10.75"
12.60"
2.7919
24"
24.000
21.562
10.25"
12.60"
2.5357
16
Operations and Instruction Manual
LANDTEC
Large Duct or Stack Applications
CONFIGURATION FOR UTILIzING FOUR (4) LANDTEC INSERTION MASS FLOW METERS FOR LARGE ROUND
pIpES OR DUCTS LARGER THAN 36" TO MINIMIzE EFFECTS OF VARYING FLOW pROFILES
(It is recommended that Factory be contacted to assist with applications of this nature)
1/2" NPT
User Entry
for Wiring
1/2" NPT
User Entry
for Wiring
LANDTEC
88mW
84 F
˚
13546 SCFM
467469670
SCF
ACCU-FLO
3/4" NPT for
Probe Support
LANDTEC
84 F
˚
13546 SCFM
88mW
467469670
SCF
ACCU-FLO
3/4" NPT for
Remote Cable
3/4" NPT for
Remote Cable
LANDTEC
84 F
˚
13546 SCFM
88mW
467469670
SCF
ACCU-FLO
LANDTEC
84 F
˚
13546 SCFM
88mW
467469670
SCF
ACCU-FLO
The outputs of the four meters will be averaged
by customer’s pLC or other method to improve
overall accuracy in measuring the flow rate.
(For medium sized round pipes [18" to 36"],
two meters, on the opposite side of the same
diameter, may be sufficient [insert parallel to an
upstream 90 degree bend for optimal benefit.])
Note, in this configuration, each sensor needs
to be averaged.
REV. 16-LIA/LRA
LANDTEC
Operations and Instruction Manual
17
In-Line Flow Meter Application
IN-LINE FLOW METERS
In-line mounting styles are available through LANDTEC in
sizes from 1/4" pipe through 4" pipe. Threaded male NPT
ends are standard up to 2-1/2"; ANSI 150lb flanged ends are
recommended for 3" and 4" models. Contact the factory if
optional end mounting styles are required. Pipe sizes in
excess of 4" require the insertion style mass flow meter.
The in-line style flow meter assembly flow section is
typically specified to match the user’s flow conduit
and is plumbed directly in the flow line by threading,
flanging, welding, etc. DO NOT USE REDUCERS.
It includes the sensing element (a self-heated flow
sensor and a temperature/reference sensor) mounted
directly in the specified flow section for exposure to
the process gas; a sensor drive circuit; microprocessor
meter board, and transmitter enclosure.
All in-line Flow Meters, 1/2" and up have built-in Flow
Conditioners. See Table (page 10) for Upstream Straight run
requirements. Note, the 1/4" and 3/8"
do not have Flow Conditioners and thus require more
straight run.
FLOW CONDITIONING SCREENS FOR IN-LINE FLOW BODIES 1/2" AND Up1
LENGTH “L” SAME AS NON-FLANGED METER
(See table on page 27. For example, 1"x8" flow
body has an 8" length.The length will be the same
whether an NPT flow body, or whether flanged.
If a flanged flow body, the 8" dimension will be
a Face-to-Face dimension.)
Screens shown
with NPT fitting.
1 Note, Flow conditioning is also available for Insertion Meter applications (see page 13)
REV. 16-LIA/LRA
18
Operations and Instruction Manual
LANDTEC
ACCU-FLO Integral (Series LIA)
SEE “WIRING” ON pAGE 10 FOR INSTRUCTIONS ON HOW TO REMOVE REAR LID;
SEE FOLLOWING pAGES FOR TERMINAL HOOkUp
INSIDE COVER VIEW
1
2
3
4
5
6
A
RED
S1
RED
WHITE
S2
WHITE
B
AC1
AC2
SPARE
4-20mA PWR
VDC IN
+
VDC GND
–
INSIDE BODY VIEW
C
COM
B+
A–
1
2
3
24 VDC
4
PULSE
4-20mA 5
VDC GND 6
INTEGRAL
1/2" NPT
User Entry
for Wiring
3/4" NPT for
Probe Support
TERMINAL BLOCK SIDE
NO CUSTOMER ACCESS
DO NOT OPEN THIS SIDE
DISPLAY SIDE
1/2" NPT
View Entry
(ONE ON EACH SIDE)
FLOW
REV. 16-LIA/LRA
LANDTEC
Operations and Instruction Manual
19
24 VDC ACCU-FLO Integral Terminals (Series LIA)
(AppROVED FOR HAzARDOUS SERVICE6)
A1 – RED – VELOCITY SENSOR WIRE (HEATED ELEMENT)
A2 – NO WIRE
A3 – RED – VELOCITY SENSOR WIRE (HEATED ELEMENT)
A4 – WHITE – TEMpERATURE SENSOR WIRE
A5 – NO WIRE
A6 – WHITE – TEMpERATURE SENSOR WIRE
INSIDE COVER VIEW
1
2
3
4
5
6
A
RED
S1
RED
WHITE
S2
WHITE
B
AC1
AC2
SPARE
4-20mA PWR
VDC IN
+
VDC GND
–
C
COM
B+
A–
1
2
3
24 VDC
4
PULSE
4-20mA 5
VDC GND 6
* * B3 – JUNCTION FOR ISOLATED pULSE
*
INTEGRAL
EXTERNALLY pOWERED
4–20 mA BY CUSTOMER
CUSTOMER
RETURN
INSIDE BODY VIEW
+
–
**
+
*B4 and B5 JUMPER
Remove jumper for Externally sourced 4-20
mA. In this mode, user supplies 9-27 Volts to
externally power the 4-20 mA loop, and the 420 mA loop becomes optically isolated.
B4 – 4-20 mA RETURN (–) AND pULSE SOURCE
B5 – VDC IN – VOLTAGE DC – pOSITIVE (+)
B6 – VDC GND – VOLTAGE DC – GROUND (–)1
C1 – COM – RS485 MODBUS GROUND1,2
C2 – B(+)–RS485_D1
C3 – A(–)–RS485_D0
C4 – 24 VDC pULSE – 0 TO 24 VDC pULSE OUTpUT 3,4
C5 – 4-20 mA – 4 TO 20 mA SIGNAL DRIVE5
C6 – VDC GND – VOLTAGE DC – GROUND (–)
1/2" NPT
User Entry
for Wiring
3/4" NPT for
Remote Cable
(on Remote Style LRA)
DEsCRIPTION
TERMINALs
DC Input Power:
24 VDC 7,8
NOTEs
B5
+ VDC
B6
– VDC GND
C5
4-20 mA
C6
Return
Do not remove
any Jumpers
C4
C6
GND
Do not remove
any Jumpers
C5
4-20 mA
B4
4-20 mA
Remove B4 & B5
Jumper
SIGNAL DRIVE
EXtERNAL SOURCE
Internally Powered:
4-20 mA
SIGNAL DRIVE
**Note, Flow Meter is supplied with a 10K (1/2
watt) metal film resistor (Resistive Jumper)
connected across Terminals C4 and C6. For
externally powered operation, in addition to
removing B4 & B5 Jumpers, it is necessary to
connect C4 Resistive Jumper to Terminal B3
instead of C6. Note, B3 must be connected to
the External sources common in order to
enable the optically isolated pulse output. In
this mode, Pulse Output is optically isolated.
Pulsed Output voltage will depend on
customer source voltage. Use LANDTEC
Resistive Jumper only!
NOTE: The LANDTEC (ACCU-FLO)
draws 2.4 watts maximum (i.e.
100ma @24VDC)
Internally Powered:
Pulsed Output
24
O
Externally Powered:
4-20 mA
9
Externally Powered :
Pulsed Output
MODBUS
1 Specify the LANDTEC (ACCU-FLO) PLUS option in order to have the Modbus Ground (Terminal C1, COM)
isolated from the 24 VDC LANDTEC Power Supply Ground (Terminal B6). All other features of ACCU-FLO
PLUS are identical to the standard LANDTEC ACCU-FLO, except other voltage available. (See footnote
8)
2 It is important to connect the Ground when using Modbus communications, or ground loop problems
may develop. Improper wiring can also damage internal circuitry
3 Note, if customer externally powers the 4-20 mA by removing the jumper, the Pulse voltage output is also effected: The voltage output of the Pulse will follow the customer power (i.e. 24 VDC external
power will result in a 24 VDC Pulse [maximum of 50 mA]; 12 VDC external power will result in a 12 VDC Pulse)
4 Pulse width 250 msec default (adjustable with Addresser software)
5 Using LANDTEC Addresser, a Low Flow Cutoff (LFC), commonly referred to as Min Cutoff or Zero Cutoff C4
B3
Remove B4 & B5
Jumper and Connect
C4 Resistive Jumper
to B3
JUNCtION fOR
PULSE REtURN
24
O
C2
RS485(+)
6
7
8
9
10
C3
RS485(–)
C1
Modbus Ground10
MODBUS GROUND
(REq’D)
can be entered into the FLOw MIN Functions. In Versions 1.82 or higher, the Low Flow Cutoff and the
4-20 mA Scaling are independent of each other. For example: A Low Flow Cutoff (LFC) of 10 SCFM on a Meter with a Full Scale of 100 SCFM will report 0 on the Display and 4 mA on the output. The output will remain at 4 mA until the LFC is exceeded: (ie: 25 SCFM=8 mA). Thus the 4 mA will always be zero based
Class I, Div 2, Groups B,C,D,T4 and ATEX Ex na IIC T4
24 VDC ±10%
Other DC voltages (5 VDC, 12 VDC, 48 VDC) available on ACCU-FLO PLUS. Contact LANDTEC
Assumes the 4-20 mA is Externally Powered
Modbus Ground becomes isolated from the B6 Power Supply Ground only on ACCU-FLO PLUS version
(specify “PLUS”)
20
Operations and Instruction Manual
LANDTEC
AC powered (ACCU-FLO) Integral Terminals (Series LIA)6
INSIDE COVER VIEW
1
2
3
4
5
6
A
RED
S1
RED
WHITE
S2
WHITE
B
AC1
AC2
SPARE
4-20mA PWR
VDC IN
+
VDC GND
–
A1 – RED – VELOCITY SENSOR WIRE (HEATED ELEMENT)
A2 – NO WIRE
A3 – RED – VELOCITY SENSOR WIRE (HEATED ELEMENT)
A4 – WHITE – TEMpERATURE SENSOR WIRE
A5 – NO WIRE
A6 – WHITE – TEMpERATURE SENSOR WIRE
C
COM
B+
A–
1
2
3
24 VDC
4
PULSE
4-20mA 5
VDC GND 6
CUSTOMER
RETURN
Grounding
Lug
B1 – AC1 – AC VOLTAGE
B2 – AC2 – AC VOLTAGE
* * B3 – JUNCTION FOR ISOLATED pULSE
B4 – 4-20 mA RETURN (–) AND pULSE SOURCE
* B5 – VDC IN – VOLTAGE DC – pOSITIVE (+)
B6 – VDC GND – VOLTAGE DC – GROUND (–)1
INTEGRAL
EXTERNALLY pOWERED
4–20 mA BY CUSTOMER
INSIDE BODY VIEW
+
–
+
*B4 and B5 JUMPER Remove jumper for
Externally sourced 4-20 mA. In this mode, user
supplies 9-27 Volts to externally power the
4-20 mA loop, and the 4-20 mA loop becomes
optically isolated.
**Note, Flow Meter is supplied with a 10K (1/2
watt) metal film resistor (Resistive Jumper)
connected across Terminals C4 and C6. For
externally powered operation, in addition to
removing B4 & B5 Jumpers, it is necessary to
connect C4 Resistive Jumper to Terminal B3
instead of C6. Note, B3 must be connected to
the External sources common in order to
enable the optically isolated pulse output. In
this mode, Pulse Output is optically isolated.
Pulsed Output voltage will depend on
customer source voltage. Use LANDTEC
Resistive Jumper only!
NOTE: The LANDTEC (ACCU-FLO)
draws 2.4 watts maximum (i.e.
100ma @24VDC)
**
C1 – COM – RS485 MODBUS GROUND1,2
C2 – B(+)–RS485_D1
C3 – A(–)–RS485_D0
C4 – 24 VDC pULSE – 0 TO 24 VDC pULSE OUTpUT 3,4
C5 – 4-20 mA – 4 TO 20 mA SIGNAL DRIVE5
C6 – VDC GND – VOLTAGE DC – GROUND (–)
1/2" NPT
User Entry
for Wiring
3/4" NPT for
Remote Cable
(ON REMOTE STYLE LRA)
DESCRIPtION
tERMINALS
NOtES
Connect Ground Wire
to Grounding Lug
AC Input Power:
115 VAC/230 VAC
B1
AC1
B2
AC2
DC Input Power:
24 VDC 7,8
B5
+ VDC
B6
– VDC GND
C5
4-20 mA
C6
Return
Do not remove
any Jumpers
C4
C6
GND
Do not remove
any Jumpers
C5
4-20 mA
B4
4-20 mA
SIGNAL DRIVE
EXtERNAL SOURCE
Internally Powered:
4-20 mA
SIGNAL DRIVE
Internally Powered:
Pulsed Output
24
O
Externally Powered:
4-20 mA
9
Externally Powered :
Pulsed Output
24
O
MODBUS
1 Specify the LANDTEC ACCU-FLO PLUS option in order to have the Modbus Ground (Terminal C1, COM)
isolated from the 24 VDC LANDTEC Power Supply Ground (Terminal B6). All other features of ACCU-FLO
PLUS are identical to the standard LANDTEC ACCU-FLO, except other voltage available. (See footnote 8)
2 It is important to connect the Ground when using Modbus communications, or ground loop problems
may develop. Improper wiring can also damage internal circuitry
3 Note, if customer externally powers the 4-20 mA by removing the jumper, the Pulse voltage output is also effected: The voltage output of the Pulse will follow the customer power (i.e. 24 VDC external
power will result in a 24 VDC Pulse [maximum of 50 mA]; 12 VDC external power will result in a 12 VDC Pulse)
4 Pulse width 250 msec default (adjustable with Addresser software)
5 Using LANDTEC Addresser, a Low Flow Cutoff (LFC), commonly referred to as Min Cutoff or Zero Cutoff C4
Remove B4 & B5
Jumper
B3
Remove B4 & B5
Jumper and Connect
C4 Resistive Jumper
to B3
JUNCtION fOR
PULSE REtURN
C2
RS485(+)
C3
RS485(–)
C1
Modbus Ground10
MODBUS GROUND
(REq’D)
can be entered into the FLOw MIN Functions. In Versions 1.82 or higher, the Low Flow Cutoff and the
4-20 mA Scaling are independent of each other. For example: A Low Flow Cutoff (LFC) of 10 SCFM on a Meter with a Full Scale of 100 SCFM will report 0 on the Display and 4 mA on the
output. The output will remain at 4 mA until the LFC is exceeded: (ie: 25 SCFM=8 mA). Thus the 4 mA will always be zero based
6 This version does not have Hazard Approvals
7 24 VDC ±10%
8 Other DC voltages (5 VDC, 12 VDC, 48 VDC) available on ACCU-FLO PLUS. Contact LANDTEC
9 Assumes the 4-20 mA is Externally Powered
10 Modbus Ground becomes isolated from the B6 Power Supply Ground only on ACCU-FLO PLUS version
(specify “PLUS”)
LANDTEC
Operations and Instruction Manual
21
ACCU-FLO Remote (Series LRA)
SEE “WIRING” ON pAGE 10 FOR INSTRUCTIONS ON HOW TO REMOVE REAR LID;
SEE FOLLOWING pAGES FOR TERMINAL HOOkUp
INSIDE COVER VIEW
INSIDE BODY VIEW
A
1
2
3
4
5
6
A
B
RED
AC1
GREEN
AC2
BLUE
SPARE
WHITE 4-20mA PWR
BLACK
VDC IN
ORANGE VDC GND
B
C
C
COM
B+
A–
24 VDC PULSE
4-20mA
VDC GND
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
REMOTE
1/2" NPT
User Entry
for Wiring
3/4" NPT for
Remote Cable
DISPLAY SIDE
(ON REMOTE STYLE LRA)
TERMINAL
BLOCK SIDE
Junction Box
contains no
electronics,
just terminals
1/2" NPT
User Entry for Wiring
3/4" NPT for
Remote Cable
(ONE ON EACH SIDE)
3/4" NPT for
Remote Cable
3/4" NPT for
Probe Support
FLOW
REV. 16-LIA/LRA
22
Operations and Instruction Manual
LANDTEC
24 VDC ACCU-FLO Remote Terminals (Series LRA)
(AppROVED FOR HAzARDOUS SERVICE6)
A1 – RED – VELOCITY SENSOR WIRE (HEATED ELEMENT)
A2 – GREEN – SENSE WIRE
A3 – BLUE – VELOCITY SENSOR WIRE (HEATED ELEMENT)
A4 – WHITE – TEMpERATURE SENSOR WIRE
A5 – BLACk – SENSE WIRE
A6 – ORANGE – TEMpERATURE SENSOR WIRE
INSIDE COVER VIEW
1
2
3
4
5
6
A
B
RED
AC1
GREEN
AC2
BLUE
SPARE
WHITE 4-20mA PWR
BLACK
VDC IN
ORANGE VDC GND
C
COM
B+
A–
24 VDC PULSE
4-20mA
VDC GND
1
2
3
4
5
6
* * B3 – JUNCTION FOR ISOLATED pULSE
*
REMOTE
EXTERNALLY pOWERED
4–20 mA BY CUSTOMER
CUSTOMER
RETURN
INSIDE BODY VIEW
+
–
+
**
B4 – 4-20 mA RETURN (–) AND pULSE SOURCE
B5 – VDC IN – VOLTAGE DC – pOSITIVE (+)
B6 – VDC GND – VOLTAGE DC – GROUND (–)1
C1 – COM – RS485 MODBUS GROUND1,2
C2 – B(+)–RS485_D1
C3 – A(–)–RS485_D0
C4 – 24 VDC pULSE – 0 TO 24 VDC pULSE OUTpUT 3,4
C5 – 4-20 mA – 4 TO 20 mA SIGNAL DRIVE5
C6 – VDC GND – VOLTAGE DC – GROUND (–)
3/4" NPT for
Remote Cable
(ON REMOTE STYLE LRA)
*B4 and B5 JUMPER Remove jumper for
Externally sourced 4-20 mA. In this mode, user
supplies 9-27 Volts to externally power the 420 mA loop, and the 4-20 mA loop becomes
optically isolated.
DESCRIpTION
TERMINALS
DC Input Power:
24 VDC 7,8
NOTES
B5
+ VDC
B6
– VDC GND
C5
4-20 mA
C6
Return
Do not remove
any Jumpers
C4
C6
GND
Do not remove
any Jumpers
C5
4-20 mA
B4
4-20 mA
SIGNAL DRIVE
EXtERNAL SOURCE
Internally Powered:
4-20 mA
1/2" NPT
User Entry
for Wiring
SIGNAL DRIVE
**Note, Flow Meter is supplied with a 10K (1/2
watt) metal film resistor (Resistive Jumper)
connected across Terminals C4 and C6. For
externally powered operation, in addition to
removing B4 & B5 Jumpers, it is necessary to
connect C4 Resistive Jumper to Terminal B3
instead of C6. Note, B3 must be connected to
the External sources common in order to
enable the optically isolated pulse output. In
this mode, Pulse Output is optically isolated.
Pulsed Output voltage will depend on
customer source voltage. Use LANDTEC
Resistive Jumper only!
Internally Powered:
Pulsed Output
24
O
Externally Powered:
4-20 mA
Externally Powered9:
Pulsed Output
24
O
MODBUS
NOTE: The LANDTEC ACCU-FLO
draws 2.4 watts maximum (i.e.
100ma @24VDC)
1 Specify the LANDTEC ACCU-FLO PLUS option in order to have the Modbus Ground (Terminal C1, COM)
isolated from the 24 VDC LANDTEC Power Supply Ground (Terminal B6). All other features of ACCU-FLO
PLUS are identical to the standard LANDTEC ACCU-FLO, except other voltage available. (See footnote 8)
2 It is important to connect the Ground when using Modbus communications, or ground loop problems
may develop. Improper wiring can also damage internal circuitry
3 Note, if customer externally powers the 4-20 mA by removing the jumper, the Pulse voltage output is also effected: The voltage output of the Pulse will follow the customer power (i.e. 24 VDC external
power will result in a 24 VDC Pulse [maximum of 50 mA]; 12 VDC external power will result in a 12 VDC Pulse)
4 Pulse width 250 msec default (adjustable with Addresser software)
5 Using LANDTEC Addresser, a Low Flow Cutoff (LFC), commonly referred to as Min Cutoff or Zero Cutoff C4
Remove B4 & B5
Jumper
B3
Remove B4 & B5
Jumpers and Connect
C4 Resistive Jumper
to B3
JUNCtION fOR
PULSE REtURN
C2
RS485(+)
6
7
8
9
10
C3
RS485(–)
C1
Modbus Ground10
MODBUS GROUND
REq’D)
can be entered into the FLOw MIN Functions. In Versions 1.82 or higher, the Low Flow Cutoff and the
4-20 mA Scaling are independent of each other. For example: A Low Flow Cutoff (LFC) of 10 SCFM on a Meter with a Full Scale of 100 SCFM will report 0 on the Display and 4 mA on the output. The output will remain at 4 mA until the LFC is exceeded: (ie: 25 SCFM=8 mA). Thus the 4 mA will always be zero based
Class I, Div 2, Groups B,C,D,T4 and ATEX Ex na IIC T4
24 VDC ±10%
Other DC voltages (5 VDC, 12 VDC, 48 VDC) available on ACCU-FLO PLUS. Contact LANDTEC
Assumes the 4-20 mA is Externally Powered
Modbus Ground becomes isolated from the B6 Power Supply Ground only on ACCU-FLO PLUS version
(specify “PLUS”)
23
LANDTEC
Operations and Instruction Manual
AC powered ACCU-FLO Remote Terminals (Series LRA)6
A1 – RED – VELOCITY SENSOR WIRE (HEATED ELEMENT)
A2 – GREEN – SENSE WIRE
A3 – BLUE – VELOCITY SENSOR WIRE (HEATED ELEMENT)
A4 – WHITE – TEMpERATURE SENSOR WIRE
A5 – BLACk – SENSE WIRE
A6 – ORANGE – TEMpERATURE SENSOR WIRE
INSIDE COVER VIEW
1
2
3
4
5
6
A
B
RED
AC1
GREEN
AC2
BLUE
SPARE
WHITE 4-20mA PWR
BLACK
VDC IN
ORANGE VDC GND
C
COM
B+
A–
24 VDC PULSE
4-20mA
VDC GND
1
2
3
4
5
6
CUSTOMER
RETURN
+
–
+
*B4 and B5 JUMPER Remove jumper for
Externally sourced 4-20 mA. In this mode, user
supplies 9-27 Volts to externally power the 420 mA loop, and the 4-20 mA loop becomes
optically isolated.
**Note, Flow Meter is supplied with a 10K (1/2
watt) metal film resistor (Resistive Jumper)
connected across Terminals C4 and C6. For
externally powered operation, in addition to
removing B4 & B5 Jumpers, it
is necessary to connect C4 Resistive Jumper to
Terminal B3 instead of C6. Note, B3 must be
connected to the External sources common in
order to enable the optically isolated pulse
output. In this mode, Pulse Output is optically
isolated. Pulsed Output voltage will depend
on customer source voltage. Use LANDTEC
Resistive Jumper only!
NOTE: The LANDTEC ACCUFLO draws 2.4 watts maximum
(i.e. 100ma @24VDC)
A
B
1
2
3
4
5
6
B1 – AC1 – AC VOLTAGE
B2 – AC2 – AC VOLTAGE
* * B3 – JUNCTION FOR ISOLATED pULSE
B4 – 4-20 mA RETURN (–) AND pULSE SOURCE
* B5 – VDC IN – VOLTAGE DC – pOSITIVE (+)
B6 – VDC GND – VOLTAGE DC – GROUND (–)1
REMOTE
EXTERNALLY pOWERED
4–20 mA BY CUSTOMER
INSIDE BODY VIEW
C
C1 – COM – RS485 MODBUS GROUND1,2
C2 – B(+)–RS485_D1
C3 – A(–)–RS485_D0
* * C4 – 24 VDC pULSE – 0 TO 24 VDC pULSE OUTpUT 3,4 3/4" NPT for
C5 – 4-20 mA – 4 TO 20 mA SIGNAL DRIVE5
Remote Cable
C6 – VDC GND – VOLTAGE DC – GROUND (–)
(ON REMOTE STYLE LRA)
DESCRIpTION
1/2" NPT
User Entry
for Wiring
TERMINALS
NOTES
Connect Ground Wire
to Grounding Lug
AC Input Power:
115 VAC/230 VAC
B1
AC1
B2
AC2
DC Input Power:
24 VDC 7,8
B5
+ VDC
B6
– VDC GND
C5
4-20 mA
C6
Return
Do not remove
any Jumpers
C4
C6
GND
Do not remove
any Jumpers
C5
4-20 mA
B4
4-20 mA
SIGNAL DRIVE
EXtERNAL SOURCE
Internally Powered:
4-20 mA
Grounding
Lug
1
2
3
4
5
6
SIGNAL DRIVE
Internally Powered:
Pulsed Output
24
O
Externally Powered:
4-20 mA
9
Externally Powered :
Pulsed Output
24
O
MODBUS
1 Specify the LANDTEC ACCU-FLO PLUS option in order to have the Modbus Ground (Terminal C1, COM)
isolated from the 24 VDC LANDTEC Power Supply Ground (Terminal B6). All other features of ACCU-FLO
PLUS are identical to the standard LANDTEC ACCU-FLO, except other voltage available. (See footnote
8)
2 It is important to connect the Ground when using Modbus communications, or ground loop problems
may develop. Improper wiring can also damage internal circuitry
3 Note, if customer externally powers the 4-20 mA by removing the jumper, the Pulse voltage output is also effected: The voltage output of the Pulse will follow the customer power (i.e. 24 VDC external
power will result in a 24 VDC Pulse [maximum of 50 mA]; 12 VDC external power will result in a 12 VDC Pulse)
4 Pulse width 250 msec default (adjustable with Addresser software)
5 Using LANDTEC Addresser, a Low Flow Cutoff (LFC), commonly referred to as Min Cutoff or Zero Cutoff C4
Remove B4 & B5
Jumper
B3
Remove B4 & B5
Jumpers and Connect
C4 Resistive Jumper
to B3
JUNCtION fOR
PULSE REtURN
C2
RS485(+)
6
7
8
9
10
C3
RS485(–)
C1
Modbus Ground10
MODBUS GROUND
(REq’D)
can be entered into the FLOw MIN Functions. In Versions 1.82 or higher, the Low Flow Cutoff and the
4-20 mA Scaling are independent of each other. For example: A Low Flow Cutoff (LFC) of 10 SCFM on a Meter with a Full Scale of 100 SCFM will report 0 on the Display and 4 mA on the output. The output will remain at 4 mA until the LFC is exceeded: (ie: 25 SCFM=8 mA). Thus the 4 mA will always be zero based
This version does not have Hazard Approvals
24 VDC ±10%
Other DC voltages (5 VDC, 12 VDC, 48 VDC) available on ACCU-FLO PLUS. Contact LANDTEC
Assumes the 4-20 mA is Externally Powered
Modbus Ground becomes isolated from the B6 Power Supply Ground only on ACCU-FLO PLUS version
(specify “PLUS”)
24
Operations and Instruction Manual
LANDTEC
Junction Box Wiring Terminals for Remote Style Meters (Series LRA)
(THERE ARE NO ELECTRONICS INSIDE JUNCTION BOX)
SEE THE pREVIOUS pAGE FOR THE OTHER END OF THE REMOTE WIRING HOOkUp (the electronics side).
CUSTOMER SIDE1
(Wired at Installation Site)
Blue
Green
Red
Orange
Black
White
CAUTION: Strip wires 3/8" and
do not crimp insulation.
Grounding Screw
GROUNDING SCREW NOT USED
(The shield [drain wire] is only connected
on the other end [the electronics end]).
Red
4.37
Red
White
Metal Conduit
is recommended
with appropriate
grounding to
minimize effects
from external
noise sources.
FACTORY SIDE
(Wired at Factory)
White
3/4” FNPT
Conduit Receptacle
Interconnect Cable2
To Terminal A1 to A6
(see page 21–23)
NOTE: The Sensor Junction Box
will have a serial number tag.
It is important to match this serial
number with the serial number
of the Remote electronics. Mixing
components from different meters
can result in significant errors.
1 NOtE: there are hidden jumpers (underneath the terminal strip) that short together the
Blue and Green wires, and also short together the Black and Orange wires. these extra
wires are part of the meter's Lead Length Compensation circuitry, allowing the user to
change the length of the interconnect cable (from 0 to 1000 feet) without effecting the
accuracy. 25 feet of cable are initially supplied (for cabling longer than 1000 feet,
contact LANDtEC).
!
2 LANDtEC supplies 25 feet of cable for the interconnect wires between the Junction Box and
the Remote Enclosures: Carroll (manufacturer), Part #C0783, 20 gauge, 6 conductor, foil
shielded, grey PVC jacket.
CAUTION: Cable and cable glands are not for use in hazardous area
environments. power, ground, outputs, shielded cable, seal fittings
and conduits are to be supplied by customer.
REV. 16-LIA/LRA
Section
B
STYLES AND FEATURES
LANDTEC
Operations and Instruction Manual
27
principle of Operation of the Thermal Mass Flow Meter
LANDTEC Thermal Mass Flow Meters have two sensors
It is essential that this constant temperature differential be
The two RTDs are clad in a protective 316SS sheath and are
temperature. It is the function of the LANDTEC hybrid-digital
constructed of reference grade platinum windings (RTDs).
driven by a proprietary sensor drive circuit. One of the
sensors is self-heated (flow sensor), and the other sensor
(temperature/reference sensor) measures the gas
temperature. The pair is referred to as the sensing element,
and is either installed in a probe as an Insertion style, or
inserted into a pipe section as an In-Line style flow meter.
As gas flows by the flow sensor, the gas molecules carry heat
away from the surface, and the sensor cools down as it loses
energy. The sensor drive circuit replenishes the lost energy
by heating the flow sensor until it is a constant temperature
maintained, even if there are wide fluctuations in gas
proprietary sensor drive circuit to maintain the differential,
whether or not the gas temperature changes, or however
quickly molecules cool off the flow sensor. It is also
necessary to properly calibrate the device with the actual gas
(or close equivalent with certain gases), in the LANDTEC
National Institute of Standards certified (NIST) calibration
facility. By accomplishing these two critical objectives, the
LANDTEC meters provide an extremely repeatable (0.2% of
Full Scale) and accurate output directly proportional to the
mass flow rate of the gas being measured.
differential above the reference sensor. The electrical power
required to maintain a constant temperature differential is
directly proportional to the gas mass flow rate and is
linearized to be the output signal of the meter.
FLOW SENSOR
(Self Heated)
TEMPERATURE SENSOR
(Reference Sensor)
REV. 16-LIA/LRA
28
LANDTEC
Operations and Instruction Manual
Features and Benefits
LANDTEC ACCU-FLO THERMAL MASS FLOW METER FOR
GASES
LANDTEC ACCU-FLO is the top selling meter in our Product Line. The
LANDTEC ACCU-FLO Thermal Mass Flow Meter features a bright,
high contrast, photo-emissive OLED display of Flow Rate, Total and
Temperature in a robust, yet lightweight, dual-compartment
industrial enclosure. The flow rate is also displayed graphically in a
horizontal bar graph format. The rear compartment is completely
separated from the electronics, and has large, easy-to-access, well
marked terminals, for ease of customer wiring (see photo below). It
is powered by 24 VDC (12 VDC optional, or 115/230 VAC). The power
dissipation is under 2.5 watts (e.g. under 100 mA at 24 VDC).
The LANDTEC ACCU-FLO Flow Meter is offered in Integral or
Remote style (which has lead-length compensation up to 1000 feet
as well as an Explosion Proof Junction Box). specify any standard
probe length or flow body size. It has a 4-20 mA output as well as a
Pulsed Output of Totalized Flow (solid state transistor drive). In
addition, LANDTEC ACCU-FLO supports full Modbus® compliant
Rs485 RTU communications (IEEE 32 Bit Floating Point).
LANDTEC ACCU-FLO is CE approved, CsA and UL approved for
Hazardous service 2 (see Approvals tab on the website).
CONTINUOUS DIAGNOSTICS & FIELD CONFIGURABILITY
LANDTEC ACCU-FLO has continuous diagnostics. The raw
calibration milliwatts (mw) is always displayed in the upper left
hand corner of the meter’s display. At any time, you can check this
reading at a “no flow” condition, and compare the reading to the
original reported “zero flow” value noted on the last few lines of
your meter’s Certificate of Conformance or the flow meter’s data
tag. This in-situ diagnostic procedure not only checks the sensor
performance and the “live zero” calibration point, but it also verifies
that the sensor is clean. It essentially provides a means to validate
that the meter is operating properly, verifies that there is no shift or
drift, and eliminates the need for annual factory calibrations. This
simple field diagnostic procedure, in addition, verifies that the
sensor is free from contamination, even without
inspection.
Although LANDTEC ACCU-FLO is fully
configured upon shipment, for the pipe and
process conditions requested, if changes
are needed, Addresser software is
optionally available for field
reconfigurability.
MAJOR BENEFITS OF THERMAL MASS FLOW METERS
n Direct Mass Flow – No need for separate temperature or pressure
transmitters
n High Accuracy and Repeatability – Precision measurement and
extraordinary repeatability
n Turndown of 100 to 1 and resolution as much as 1000 to 1
n Low-End sensitivity – Measures as low as 5 sFPM (e.g., 1 sCFM
in a 6" pipe)
n Negligible Pressure Drop – Will not impede the flow or waste energy
n No Moving Parts – Eliminates costly bearing replacements, and
prevents undetected accuracy shifts
n Dirt Insensitive – Provides sustained performance
n Low cost-of-ownership
n Ease of installation and convenient mounting hardware
SpECIFIC BENEFITS OF THE LANDTEC ACCU-FLO
n Features In-situ “Field Zero Calibration Check” of sensor’s
performance – verifies that the sensor is clean, and assures that there
is no drift, or shift in the flow meter
n Compact design of enclosure is only 41⁄8" dia. by 41⁄4" deep (DC
Models)
n High contrast photo-emissive OLED display with numerical Flow
Rate, Total and Temperature, as well as Graphical Flow Indicator
n Calibration milliwatts (mW) is continuously displayed, providing for
ongoing diagnostics
n Photocell activated screen saver to extend display life2
n Proprietary digital sensor drive circuit provides enhanced signal
stability and unaffected by process temperature & pressure changes
n Modbus compliant Rs485 RTU communications
n HART™ communications (optional)
n Isolated 4-20 mA output and pulsed output of Totalized Flow
n Rugged, user-friendly packaging with easy terminal access
n Option for solar Energy use (12VDC models)
n Remote style has Lead-Length Compensation. Allows remote
electronicsup to 1000 feet from probe; Explosion Proof Junction Box
has no circuitry, just terminals (suitable for harsh environments)
n Low power dissipation, under 2.5 Watts (e.g. under 100 ma at 24
VDC)
n Field reconfigurability via HART or optional Addresser software
n Flow conditioning built into In-Line flow meters (1/2" and up)
n Captive Flow Conditioners for Insertion meter applications, if
required
1 Only available with 24VDC powered meters
2 Note, a built-in photocell continuously monitors the ambient light, and adjusts the display
brightness for optimum long-term life, and also senses motion which automatically switches
display from Screen Saver mode to Normal mode
REV. 16-LIA/LRA
LANDTEC
Operations and Instruction Manual
29
LANDTEC ACCU-FLO Styles and Specifications
LANDTEC is your source for monitoring, measuring and controlling the gas mass
flow in your industrial process, building management system or environmental
application. Our high performance, NIST Traceable, Thermal Mass Flow Meters will
help in crease productivity, reduce energy costs, maximize product yields, and/or
help reduce environmental insult. LANDTEC provides high quality In-Line and
Insertion Thermal Mass Flow Meters for a wide variety of industrial, commercial,
and environmental monitoring needs, including carbon credit verification for
Greenhouse Gas reduction.
Our experienced application engineers, many of whom have worked in the
Thermal Mass Flow marketplace since its inception, will assist you in choosing the proper gas Flow Meter for your application – and they will be pleased to offer
installation guidance to assure that the meter(s) selected will perform as accurately
as possible. Additionally, our Service Staff stand ready to support you with any
after-sale assistance that you may require. LIA sERIEs – INTEGRAL
LRA sERIEs – REMOTE
Mounting
Hardware
(included)
Optional SVA05 Isolation Valve Assembly
ACCU-FLO LIA/LRA
Standard accuracy is +/– 0.5% of Full Scale +/– 1% of reading with a turn- down
of 100 to 1 and resolution as much as 1000 to 1. Repeatability is 0.2%. NOTE: Enhanced accuracy optionally available with limited turn-down4.
The electronics has an isolated 4 to 20 mA output proportional to Mass Flow Rate
as well as pulsed outputs of Totalized Flow (24 VDC solid state transistor drive). In
addition, Modbus RS485 RTU communications is standard (IEEE 32 Bit Floating Pt).
INTEGRAL STYLE ELECTRONICS
REMOTE STYLE ELECTRONICS
Electronics is Integral Style, with rugged windowed dual
compartment NEMA 4 enclosure with local display. The display is a
high contrast photo-emissive OLED display with Screen Saver, and
it displays Mass Flow Rate, Totalized Flow and Temperature as well
as a graphical representation of Flow Rate in a horizontal bar graph
format. In addition, the calibration milliwatts (mw) is continuously
displayed, providing ongoing diagnostics.
Electronics is Remote Style, with rugged windowed dual compartment NEMA 4 enclosure with display. The display is a high contrast photoemissive OLED display with Screen Saver, and it displays Mass Flow Rate, Totalized Flow and Temperature as well as a graphical representation
of Flow Rate in a horizontal bar graph format. In addition, the calibration milliwatts (mw) is continuously displayed, providing ongoing
diagnostics. Includes Remote Mounting Hardware. The Flow Element’s Junction Box is Explosion Proof (Class 1, Div 1, Groups B, C, D), and does not have any electronics – only a wiring
terminal block. The Junction Box is connected to the Remote Electronics by 25 feet of lead-length compensated cable. The cable (6-conductor)
can be lengthened or shortened without affecting accuracy (max loop resistance 10 ohms, over 1000 feet), if grounded properly.
X
X
LRA Insertion2
LIA In-Line1,3,5
LIA Insertion2
LRA In-Line1,3,5
Flow Element is In-Line Style consisting of a choice of 316
Stainless Steel Schedule 40 Flow Bodies sized from 1/4" x
6” long to 4" x 12" long
Flow Element is Insertion Style, consisting of a 1/2" OD
probe (3/4" optional) with lengths up to 36" long (typically 15" long) suitable for insertion into the center of a process pipe
Flow Element is In-Line Style consisting of a choice of 316
Stainless Steel Schedule 40 Flow Bodies sized from 1/4” x
6” long to 4” x 12” long
Flow Element is Insertion Style, consisting of a 1/2” OD
probe (3/4” optional) with lengths up to 36” long (typically 15” long) suitable for insertion into the center of a process pipe
ENGINEERING SpECIFICATIONS OF OpTIONAL LANDTEC ACCU-FLO pLUS
This is an optional version of LANDTEC ACCU-FLO offering a separate ground for the
24VDC Power Supply (optional 5 VDC or 12 VDC Power Supplies) which isolates the
Modbus ground from the power supply ground. All other features of ACCU-FLO PLUS
1 Male NPT ends are standard, with flanged ends, tube, or butt weld optionally available
2 Mounting hardware such as Isolation Valve Assemblies, Compression Fittings, and Flanges, are optional
3 Chart of Flow Body length “X” is on Application Data Sheet on website as well as in the ACCU-FLO O&M
4 Enhanced accuracy available upon request, especially if turndown limited. Contact LANDTEC
5 Flow Conditioners are built into In-Line Style Flow Bodies from 1⁄2" to 4" are identical to the standard LANDTEC ACCU-FLO, except Approvals do not apply at
this time.
®
®
REV. 16-LIA/LRA
30
Operations and Instruction Manual
LANDTEC
LANDTEC ACCU-FLO Organic (OLED) Display1,2,3
8
1LANDTEC 5
2
3 6
7
4
N8
˚'
4$'.
4$'
..
.
COMM
PWR
ACCU-FLO
1
Raw Calibration milliwatts (mw) for Diagnostics
and Periodic “Zero Flow” Calibration Check
2
Graphical Indication of Percentage of Full Scale
Flow Rate
3
4
Flow Rate
5
6
7
8
Totalized Flow (Consumption)
(Value is Retained during Power Outage
or Power Cycling)
Flashes with each pulsed output of consumption
Engineering Units of Flow Rate (the last digit
can be S(seconds), M(minute), H(hour), D(day)
Engineering Units of Consumption
Photocell activated Screen Saver extends display life
1 Upon start-up, the Revision No., Serial No., and Modbus ID will display for a few
seconds. Also the output configurations symbol is momentarily displayed
2 Note, a built-in photocell continuously monitors the ambient light, and adjusts the
display brightness for optimum long-term life, and also senses motion which
automatically switches display from Screen Saver mode to Normal mode
3 to view display, wave hand over display or use a flashlight. the flow Meter displays
for one minute, then the Screen Saver resumes
REV. 16-LIA/LRA
LANDTEC
Operations and Instruction Manual
31
Approvals
LANDTEC, INC.- ACCU-FLO THERMAL MFM
HAzARDOUS LOCATION AppROVALS
All 24 VDC Powered LANDTEC ACCU-FLO Meters (LIA Integral
Class I, Div 2, Groups B,C,D T4
ATEX: Ex nA IIC T4 X
Insertion, LIA In-Line, LRA Remote Insertion, LRA Remote In-
MODEL #
ATEX: Ex nA IIC T4. AC Powered Meters are not approved.
FOR USE IN HAZARDOUS LOCATIONS–CAUTION–DISCONNECT FROM POWER SUPPLY BEFORE
OPERATING. KEEP COVER TIGHT WHILE CIRCUITS ARE ALIVE. CONDUIT SEALS MUST BE
INSTALLED WITHIN 18˚ OF THE ENCLOSURE.
ATTENTION–OUVRIR LE CIRCUIT AVANT D’ENLEVER LE COUVERCLE GARDER LE COUVERCLE
BIEN FERME TANT QUE LES CIRCUITS SONT SOUS TENSION. UN SCELLEMENT DOIT ETR
INSTALLE A MOINS DE 45CM DU BOITER.
Line) are approved for Class 1, Div 2, Groups B, C, D, T4 and
Testing is in accordance with the following Safety Standards:
• UL1604, Third Edition, Electrical Equipment for Use in Class
I and II, Division 2, and Class III Hazardous (Classified)
Locations
• CSA C22.2 No. 213-M1987 (R1999), First Edition, Non-
incendive Electrical Equipment for Use in Class I, Division 2
Hazardous Locations
• UL/CSA 61010-1, Second Edition, Safety Requirements for
Electrical Equipment for Measurement, Control, and
Laboratory Use – Part 1: General Requirements
The following is required to comply with the above
mentioned Approvals
1) Repair of the product (or replacement of components) is
not possible by the user
2) As noted on the following label (see below) it will contain
the following markings: Ex symbol, nA symbol IIC,
temperature class
3) All ACCU-FLO DC meters will be marked with “X” which
means that these Special Conditions of
Use will apply:
a) The completed meter must be installed with a rigid or
flexible metal conduit in order to satisfy approval
conditions.
SERIAL #
mW0 =
CONFORMANCE
All AC & DC Powered LANDTEC Series
LIA (LANDTEC ACCU-FLO-Integral) and Series LRA (LANDTEC
ACCU-FLO-Remote) are CE Compliant for the following CE
directives:
• EN61000-6-4 for Electromagnetic compatibility;
• EN61000-3-2 for Harmonics;
• EN61000-3-3 for Flicker;
• EN61000-6-2 for Electromagnetic Compatibility (Immunity
for Industrial Environments), which includes EN61000-4-2
for ESD;
• EN61000-4-3 for Radiated Immunity;
• EN61000-4-4 for EFT/B; EN61000-4-5 for Surge;
• EN61000 for Conducted Immunity;
• EN61000-4-8 for Magnetic Immunity;
• EN61000-4-11 for Voltage Interruptions
MEDICAL CONFORMANCE
Contact LANDTECn if Medical CE Conformance
is required. (AC Powered LANDTEC ACCU-FLO Meters only.)
The Standard is to IEC 60601-1-2:2007 Edition 3
b) The meter has been approved for use with the
electronics enclosure in an ambient temperature from
–40˚C < Ta < 65˚C. 4) LANDTEC considers a linear correction suitable for
temperatures exceeding the temp code rating of 40˚C
(104˚F) thus no customer correction is needed.
REV. 16-LIA/LRA
Section
C
DRAWINGS
LANDTEC
Operations and Instruction Manual
35
LIA Series Integral Style Mass Flow Meters
IN-LINE STYLE1,3
150#, 300#, or 600# flanged ends are optionally available. (150#
flanges recommended on 3" and 4" Flow Bodies)
4.61
CAUTION:
Do not rotate the
Enclosure of In-Line
Style Meters relative
to the Flow Tube, or
the calibration may
be effected since the
sensors may become
misaligned.
5.38
1/2" NPT
User Entry
for Wiring
2-3/4” Nominal
FLOW
Depth: DC Enclosure depth is 4.35" AC Enclosure depth is 5.35"
See Chart
INSERTION STYLE2
150#, 300#, or 600# flanged mounting is optionally available.
Available probe lengths are 6", 12", 15", 18", 24", 30", 36" or 48".
Standard probe is 1/2" diameter (3/4" optional – recommended for
36" or 48")
4.60
4.50
1/2" NPT
User Entry
for Wiring
Probe Length
FLOW
1 NPt fittings standard
2 flanged Mounting available for high pressure operation
3 flow Conditioning built in to flow Meter Pipe Sizes 1/2" and up. Contact LANDtEC for
optional 1/4" tube flow body.
REV. 16-LIA/LRA
36
Operations and Instruction Manual
LANDTEC
LRA Series Remote Style Mass Flow Meters
IN-LINE STYLE1,3,4
150#, 300#, or 600# flanged ends are optionally available. (150#
flange recommended on 3" and 4" Flow Bodies)
INSERTION STYLE2
150#, 300#, or 600# flanged mounting is optionally available.
Available probe lengths (C) are 6", 12", 15", 18", 24", 30", 36" or 48".
4.60
1/2" NPT User
Entry for Wiring
3/4" NPT
for Remote
Cable
Junction Box is Explosion
Proof, Class 1, Div. 1 & 2,
Group B, C, D
(NO ELECTRONICS)
See Chart
on Page 35
CAUTION: Do not rotate the Junction Box of In-Line Style
Meters relative to the Flow Tube, or the calibration may be
effected since the sensors may become misaligned.
1 NPt fittings standard
2 flanged Mounting available for high pressure operation
3 flow Conditioning built in to flow Meter Pipe Sizes 1/2" and up. Contact LANDtEC for
optional 1/4" tube flow body.
4 See Chart on page 35.
5 Junction Box has the following certifications: Class I, Groups B,C,D; Class II, Groups E,f,G;
Class III; 4X, 7BCD, 9EfG; fM Standard 3615; UL Standard 1203; CSA Standard C22.2 No. 30;
and NEMA Compliance
REV. 16-LIA/LRA
4.50
3/4" NPT for
Remote Cable
3.50
Junction Box is
Explosion Proof,
Class 1, Division 1 & 2,
Group B, C, D
(NO ELECTRONICS)5
3/4" NPT for
Remote Cable
1/2" CORD GRIP
SUPPLIED ON
ELECTRONICS
END
25' CABLE SUPPLIED
Can be shortened or
lengthened in the field
by up to 1000 ft. without
affecting calibration.
LANDTEC
Operations and Instruction Manual
37
LANDTEC ACCU-FLO Remote Bracket Layout
MOUNTING OpTIONS
1. Overhead with U-bolts (customer supplied) across pipe on
each leg
2. Vertically, as shown
3. Horizontally
1/2" NPT
User Entry
for Wiring (2)
.266 DIA
HOLES
4.61
WAVE
WASHER
WAVE
WASHER
1/2" NPT User Entry
for Wiring (2)
CORD GRIP or
NPT PLUG (as req’d)
BOTH SIDES
3/4" NPT for
Remote Cable
7.38
2.00
REV. 16-LIA/LRA
38
Operations and Instruction Manual
LANDTEC
Mounting Hardware3
SVA05 SERIES ISOLATION VALVE ASSEMBLY DETAIL5,6
SVA05 SERIES ISOLATION VALVE ASSEMBLY
FOR INSERTION METERS4
Cut away view of probe inserted through isolation
ball valve assembly.
(for Low Pressure sVA05 see page 39)
Used for pressures to 250 psig1 (shown for use with 1/2"
diameter insertion meters). 150# or 300# flanged mounting
is optionally available. Available sizes are 1/2" x 3/4" NPT
(SVA05 shown), and 3/4" x 1" NPT for use with 3/4" diameter
insertion meters (SVA07).
SENSOR ASSEMBLY
EXTENDS 2.25" L
BELOW THE
LOWER EDGE OF
THE WELDED
COLLAR CLAMP
WITH CHAIN TAUT
11.00
PROBE LENGtH
(with sensor)
3/4" THREADOLET
(User Supplied)
NOtE: User needs to weld a 3/4" female threadolet (of
appropriate radius) to mate with existing pipe after a 3/4" hole
has been drilled in pipe. the 3/4" Male Coupling of the LANDtEC
Isolation Valve Assembly will thread into the user’s 3/4"
threadolet.
1/2" BORE
SINGLE PIECE
COLLAR CLAMPS7
12"
15"
18"
24"
2
SAFETY CHAIN
1/2"–3/4" BALL VALVE
WELDMENT WITH
1/2" TUBE TO PIPE
COMPRESSION FITTING
3/4"x1.5"
PIPE NIPPLES
3/4"x3"
BALL VALVE
SAfEtY
CHAIN LENGtH2
8.25"
11.25"
14.25"
20.25"
3/4"x1"
HALF COUPLING
(THREADOLET)
STCF SERIES TEFLON FERRULE
COMpRESSION FITTING
1/2" tube x 1/2" pipe fitting (shown, not to scale), is used for
low pressure insertion applications to 125 psig (Stainless
Steel Ferrule optional for higher pressure applications – up to
225 psig). Also available in 3/4" tube x 3/4" pipe size.
MOUNTING pLATE FOR THIN WALLED DUCTS
(INCLUDES STCF05 COMpRESSION FITTING)
1.92
1 At 250 psig, force exerted on 1/2" diameter probe is 50 lbs
2 Safety chain is designed to prevent probe from accidentally escaping from assembly during removal from
pressurized pipe
3 Insertion meters can have optional flanged mounting (generally used for high pressure or very hot gases). this
adaptation is not shown. Consult factory for details.
4 Maximum gas temperature, 200f, unless high temperature models ordered.
5 Hot tapping is feasible by removing Weldment (upper portion of assembly temporarily removed)
6 See page 46. SVA05 can be utilized for Sensor functionality and Zero Self Check.
7 the allen wrench for SVA05 is 9⁄64 (it is 3⁄16 for SVA07).
REV. 16-LIA/LRA
4"
4"
LANDTEC
Operations and Instruction Manual
39
SVA05Lp Low pressure Isolation Valve Assembly
HANDLE IN CLOSED POSITION
HANDLE IN OPEN POSITION
Teflon Ferrule
316SS Compression Fitting
5.5"
without
threadolet
1/2"-3/4" Brass Adaptor
3/4" Brass Full Port Ball Valve
Valve Handle
6.5"
with
threadolet
7.00"
with
threadolet
8.00"
with
threadolet
316SS 3/4"x 1-1/2" Pipe Nipple
Customer
Supplied Threadolet
NOTES AND CAUTIONS
• Suitable for low pressure Air or Natural Gas applications
(maximum 50 PSIG)
• Assumes 1⁄2" Insertion Probe inserted to center of a Pipe
(see LANDtEC Probe Insertion Guidelines)
• teflon ferrule permits ease of Probe insertion or removal
• Exercise caution when loosening ferrule nut during
insertion and removal of Probe, since this model has no
Safety Chain
• Note, maximum upward force is 20% of pipe pressure
(i.e., 10 Lbs with 50 PSIG)
• the Assembly will be shipped with a plastic sleeve that
protects the 3/4" pipe nipple
• It is the Customer’s responsibility to weld a female threadolet with correct
diameter to pipe
REV. 16-LIA/LRA
40
Operations and Instruction Manual
LANDTEC
Flanged Ends for
In-Line Meter (OpTIONAL)
Flanged Mounting for
Insertion Meter (OpTIONAL)
UPSTREAM
Flanges for 3" pipe sizes and
smaller have 4 bolt holes
Flanges for 31⁄2" pipe sizes and up,
have 8 bolt holes
REV. 16-LIA/LRA
W
FLO
Section D
DIAGNOSTICS
Operations and Instruction Manual
Common Diagnostics
SYMpTOM: Display failure, or pixels extremely dim.
CORRECTIVE ACTION: Contact Factory. Certain types of
failures are under long term warranty. Please note that the
4-20 mA will still function normally.
LANDTEC
43
c) Also, if extra cable exists, move the extra cable as far
away as possible from any source of analog noise, such as
large motors or VFDs.
SYMpTOM: Display fading, or partially fading.
CORRECTIVE ACTION:
a) Some fading, particularly with those characters that are lit
up most frequently, is normal. The flow meter will
continue to function properly, and flow meter accuracy
and outputs will not be effected.
SYMpTOM: Meter reading zero continuously, or Full Scale
continuously, or temperature reading is abnormally low
(hundreds of degrees below zero).
pOSSIBLE CAUSES/SUGGESTED CORRECTIVE ACTION:
a) It is likely that a wire is loose. But in rare cases,
a sensor could fail (i.e., if a standard sensor, HT01 or HT02
sensor exceeds a process temperature of 450˚F.)
c) Note, in late 2009, the LANDTEC ACCU-FLO was modified
to incorporate a built-in photocell. The purpose of the
photocell is to adjust the display brightness with ambient
lighting. The brighter the surrounding lighting conditions,
the brighter the display. Lower ambient lighting
conditions, such as a factory environment, will dim the
display. The display will be dimmest if operated in low
ambient lighting, or at night. The photocell circuit is
designed to extend the life of the display, and to
minimize fading.
c) Also, to verify that the electronics and the sensor serial
number are the same, note the following: The sensor’s
serial number will come up upon power up, right after
Initializing on the Display. If the serial number doesn't
agree with the Junction Box labels, that would affect calibration (in other words, sensors and electronics are a
matched pair—mixing them up will cause false readings).
Also metal Serial Number Tags are fastened to both the
electronics and the Junction Box. They must have identical
Serial numbers.
b) In extreme cases, contact the factory for display
replacement.
d) Note, in early 2010, a further enhancement was added to
further extend the life of the display. The above
mentioned built-in photocell also
senses motion which automatically switches display from
Screen Saver mode to Normal mode.
SYMpTOM: Erratic Readings.
pOSSIBLE CAUSES: If a large Motor or Generator or
Variable Frequency Drive (VFD) is nearby the enclosure, it
may be inducing sufficient analog noise into the circuitry to
temporarily corrupt the data.
SUGGESTED CORRECTIVE ACTION:
a) If a Power-Restart temporarily solves the problem, than it
is likely that the source of the noise was the problem.
b) To prevent subsequent problems, if a Remote
Style Meter, move the enclosure as far away as possible
from the source (the Motor or VFD).
c) If an Integral Style Meter, mount the meter in
a different location (further from the source) or move the
source further from the meter.
SYMpTOM: Erratic Readings on a Remote Meter.
pOSSIBLE CAUSE: In some cases, analog noise is induced
into the Remote cable causing erratic, or climbing readings.
SUGGESTED CORRECTIVE ACTION:
a) Be sure the remote cable is installed in metal conduit and
grounded on one end (in some cases, grounding both
ends may be required).
b) Also, avoid coiled cable, especially if not in metal conduit.
b) Check for continuity to be sure the wiring is
making good contact at the terminals of the Junction Box.
d) To check if a sensor has failed on a remote style meter, it
is easy to use the Junction Box to do so. You must Power
Down (shut off power), but you do not need to remove
the probe from the pipe. Refer to page 24.
e) An Ohm Meter is required to check across the sensor
leads of the Flow Sensor. Look at the drawing of the
Junction Box. Disconnect the red wires on the Factory Side
to isolate and measure the resistance. If the reading is
infinity or a short, it means that sensor has failed.
f) Now check the Temperature Sensor. Disconnect the white
wires on the Factory Side to isolate and measure the
resistance. If you have infinity or a short, it means that
sensor is burned out. Note: Normally the sensors will read
approximately 110 ohms at 70˚ F. At higher temperatures
they should read a higher resistance, but both sensors
should have a similar value.
g) On integral style meters (LIA), there is no Junction Box. In
that case, refer to the ACCU-FLO Integral Terminals on
page 19 and check the sensor wires. Remove the appropriate wires first (red pair for flow, then white pair for
temperature). Measure their resistance. If reading infinity
or short, it means that sensor has failed.
SYMpTOM: Meter Railing (Pegging) or Reading High
pOSSIBLE CAUSES/SUGGESTED CORRECTIVE ACTION:
a) Insufficient straight run (i.e. flow profile is disturbed,
causing errors).
b) Possible jet effect if upstream pipe is smaller than meter
flow body or if valve is too close upstream to meter.
44
LANDTEC
Operations and Instruction Manual
c) Not following Probe Insertion Guideline.
c)
e)
e) If sensor is not aligned properly, with “Upstream” mark
facing upstream, a rotation greater than ± 5 degrees may
cause change in reading (greater than ± 5 degrees and
less than ± 20 degrees causes meter to over-report; a
greater rotation actually blocks the sensor, and causes
meter to under-report).
d) If sensor is inserted in reverse (“Upstream” mark is facing
downstream) Meter may over-report (or under-report) by
as much as 30%.
f)
If sensor is not aligned properly, with “Upstream” mark
facing upstream, a rotation greater than
± 5 degrees may cause change in reading
(greater than ± 5 degrees and less than ± 20 degrees
causes meter to over-report; a greater rotation actually
blocks the sensor, and causes meter to under-report).
A downstream valve too close to the meter (flow may be
reflecting back).
g) Possibly caused by water droplets condensing out of gas
stream (which generally causes output to spike; but if
droplets are near continuous, output may rail).
h) Meter is miswired, especially in Remote Style
application.
i)
j)
Possibly caused by water droplets condensing on inside
of pipe wall, which roll down or hit sensor causing
output to spike; but if droplets are near continuous,
output may rail. Note: Recommend installation 45˚ from
vertical (see drawing on page 68).
Possibly caused by water droplets condensing out of gas
stream and filling the cavity containing the sensing
elements (usually due to probes mounted below
horizontal in saturated pipes).
k) Sensor may be contaminated. Remove probe, wipe off or
clean with a solvent. Reinsert.
l)
Using a different gas or gas mix than the meter was
specified and calibrated for.
m) If a Remote Style Meter (LRA), be sure Serial Numbers of
Junction Box and Remote Electronics are identical (if not,
errors in calibration are inevitable). To confirm, verify
that Junction Box Serial Number Tag has identical Serial
Numbers
to Tag on Remote Enclosure.
n)
Meter may appear to be reading high if user is
comparing LANDTEC flow meter readings (SCFM) to an
uncorrected volumetric device (ACFM). For example, at
constant volume, a decrease in gas temperature will
increase the mass flow (SCFM). That is completely
normal.
SYMpTOM: Reading Low
pOSSIBLE CAUSES:
a) Insufficient straight run (i.e. flow profile is
disturbed, causing errors).
b) Poor flow profile Upstream (insufficient upstream
straight run).
REV. 16-LIA/LRA
Not following Probe Insertion Guideline.
d) If sensor is inserted in reverse (“Upstream” mark is
facing downstream) Meter may over-report (or underreport) by as much as 30%.
f) Sensor may be contaminated. Remove probe, wipe off or
clean with a solvent. Reinsert.
g) Using a different gas or gas mix than the meter was
specified and calibrated for.
h) If a Remote style Meter (LRA), be sure Serial Numbers of
Junction Box and Remote Electronics are identical (if not,
errors in calibration are inevitable). To confirm, verify that
Junction Box Serial Number Tag has identical Serial
Numbers to Tag on Remote Enclosure.
i) Meter may appear to be reading low if user is comparing
LANDTEC flow meter readings (SCFM) to
an uncorrected volumetric device (ACFM). For example,
at constant volume, an increase in gas temperature will
lower the mass flow (SCFM). That is completely normal.
j) On most models, the Totalizer will not start count-ing for
10 seconds after power up so any flow data will not be
accumulated during this time.
k) Insufficient power supply—most products require
minimum 100 mA.
l) Excessive load on the 4-20 mA. (To check if problem is
due to 4-20 mA output device, temporarily remove
device, and observe if display reads as expected).
SYMpTOM: Totalizer can take up to 10 seconds to update its
reading when flow meter is first powered up, or a channel is
changed.
CORRECTIVE ACTION: None. This slight delay is completely
normal.
SYMpTOM: Display does not have power
pOSSIBLE CAUSE: Mis-wiring
SYMpTOM: 4-20 mA output not tracking the flow rate
display
pOSSIBLE CAUSE:
a) In normal operation (Self Powered) B4 and B5 must be
jumpered to supply power to loop. See pages 19 and 22.
b) In Externally Powered mode, the jumper must be
removed. Verify that 9 to 27 Volts DC is supplied to
externally power the loop as per page 19 or 22.
45
LANDTEC
Operations and Instruction Manual
In-Situ Calibration Check
RECOMMENDED ON A QUARTERLY BASIS FOR EpA 40 CFR 98 pERIODIC
CALIBRATION VERIFICATION, CAR1 pROTOCOLS, AND CDM2 pROTOCOLS
LANDTEC ACCU-FLO has continuous diagnostics. The raw
calibration milliwatts (mw) is always displayed in the upper
left hand corner of the meter’s display allowing the user to
conduct an “in-situ” calibration. At any time, you can check
this reading at a “no flow” condition and compare the
reading to the original reported “zero flow” value noted on
the last few lines of your meter’s Certificate of Conformance
or the flow meter's data tag. This diagnostic procedure not
only checks the sensor performance and the “live zero”
calibration point, but it verifies that the sensor is clean. It
essentially provides a means to validate that the meter is
operating properly, verifies that there is no shift or drift, and
eliminates the need for annual factory calibrations. This
simple field diagnostic procedure also verifies that the sensor
is free from contamination, even without inspection.
1. Verify that meter has no gas flow3
Close appropriate valves in the process to have a “no
flow” condition so you can check the “live zero” mw
output of the actual gas (it should be checked at the same
pressure as noted on Certificate of Conformance).
If it is not possible to close valves in the process (e.g.
natural gas supply must be kept flowing), a user with a
LANDTEC SVA05 or SVA07 Isolation Valve Assembly can
check “zero” of the actual gas and pressure without
shutting off the gas supply.
Refer to SVA SERIES ISOLATION VALVE ASSEMBLY DETAILS
ON PAGE 38.
a) Loosen lower Collar Clamp completely4
b) Slightly loosen compression fitting until Probe can be
lifted
c) Lift Probe until Safety Chain is taut
d) Tighten compression fitting
e) Close Valve
f) Check zero mw as per “2” below
Optionally, do an ambient air check by removing probe
and covering up sensor by capping the sensor with a
plastic bag, empty plastic water bottle or other means of
preventing flow (see 8).
2. Observe the raw mw on the top of the meter’s
display. After one to three minutes of “no flow”
stabilization, check the observed reading against the flow
meter’s data tag or last line(s) of your Meter’s Certificate
of Conformance.
3. A value within 5 milliwatts of the original Factory value
(assuming the same gas is checked at same pressure)
indicates that meter is still in calibration.
4. A value greater than 5 mw, but less than or equal to 10
mw, also indicates that the meter is still in calibration, but
this reading may have been influenced by one or more of
the following factors: gas composition, pressure, dirt,
non-zero conditions, and sensor orientation. Any of these
REV. 16-LIA/LRA
factors can have an effect on mWo. It is a very sensitive
data point; that is why it is such a good check.
5. Note, if all of the above factors were remedied,
it would be expected that the mW zero would report less
than or equal to 5 milliwatts.
6. Note, in some cases, contamination of the sensor is the
only cause of the additional heat transfer during the “no
flow” test. Remove probe, and clean the sensor (use an
appropriate non-corrosive solvent to remove build up). A
soft brush can be used to gently clean the sensing surface,
using caution to avoid damaging the sensor elements (the
RTD’s).
7. In summary, if a technician in the field were able to
simulate LANDTEC calibration conditions, he too would
find that the mWo would be within one mW or very close
to that. Since this is not always possible, we are finding
that after considering all of the field variables, a mWo in
the field that is within 10 mW is an acceptable value (see
9). This would allow for a check to be done in the pipe
under application conditions.
8. Note, if desired, a second check can be conducted
as well but using ambient air: This validation method
requires that the sensor be removed from the pipe and
inserted in a container such as an empty plastic water
bottle.
9. For CAR1 compliance LANDTEC recommends a quarterly InSitu Calibration Check for the following Protocols:
U.S. Landfill Protocol, Version 4.0, Par. 6.2
Mexico Landfill Protocol, Version 1.1, Par. 6.2
U.S. Livestock Protocol, Version 3.0, Par. 6.2
U.S. Livestock Protocol, Version 4.0, Par. 6.3
Mexico Livestock Protocol, Version 2.0, Par. 6.2
As per the protocols, the maximum allowable drift is 5%.
Percent drift can be determined by multiplying the mW
change from factory value (see 2) by 1.0% (i.e. each mW
change equals 1% drift).
1 CAR is the Climate Action Reserve. the Climate Action Reserve is a national offsets program
working to ensure integrity, transparency and financial value in the U.S. carbon market. It
does this by establishing regulatory-quality standards for the development, quantification
and verification of greenhouse gas (GHG) emissions reduction projects in North America. the
Climate Action Reserve operates alongside its sister program, the California Climate Action
Registry (California Registry), which was created by the State of California in 2001 to address
climate change through voluntary calculation and public reporting of emissions.
2 CDM Methodologies, ACM 0001, “Methodological tool to determine the mass flow of a
greenhouse gas in gaseous stream” (EB61 Report, Annex 11, Page 1).
3 LANDtEC "zeros" the meter in a horizontal pipe. If you have a vertical pipe, mW will be
slightly lower
at zero (also see note 4).
4 the allen wrench to loosen collar clamp is 9⁄64 on the SVA05 (it is 3⁄16 on the SVA07).
Section
E
WARRANTIES AND
SERVICE WORk
LANDTEC
Operations and Instruction Manual
49
Warranties and Service Work
LIMITED WARRANTY
CANCELLATION / RETURN pOLICY
LANDTEC products are warranted against faulty materials or
Cancellation or Return: After issuance of a purchase order
workmanship for one year from the date of shipment from
(by phone, mail, e-mail or fax) or a credit card order (by
sole option, replacement of products and components
for any cancelled order. Cancellations must be in writing (by
the factory. LANDTEC’s obligation is limited to repair, or at its
which, upon verification by LANDTEC at our factory in Colton,
California, prove to be defective. LANDTEC shall not be liable
for installation charges, for expenses of Buyer for repairs or
replacement, for damages from delay or loss of use, or other
indirect or consequential damages of any kind. This warranty
is extended only to LANDTEC products properly used and
properly installed for the particular application for which
intended and quoted; and does not cover water damage due
to improper use of cord grips or removal of protective caps;
and does not cover LANDTEC products which have been
altered without LANDTEC authorization or which have been
subjected to unusual physical or electrical stress. LANDTEC
makes no other warranty, express or implied, and assumes
no liability that goods sold to any purchaser are fit for any
particular purpose. Transportation charges for materials
shipped to the factory for warranty repair are to be paid by
the shipper. LANDTEC will return items repaired or replaced
under warranty, prepaid. NOTE: No items will be returned for
warranty repair without prior written authorization from
LANDTEC. LANDTEC does not warranty damage due to
corrosion.
phone, mail, e-mail or fax), there will be a cancellation fee
mail, e-mail or fax):
1) If credit card order or non-credit card order is
cancelled within 7 days of issuance of purchase order or
date order was placed (which ever is
earlier), there will be a 10% cancellation fee.
2) If credit card order or non-credit card order is
cancelled after 7 days, but prior to shipment, there will be
a 20% cancellation fee. (If order is cancelled due to late
delivery, the cancellation
fee will be waived. Late delivery is defined as
shipping a meter 7 days or later than the delivery date
acknowledged by LANDTEC at time of placing order).
3) If a credit card customer decides to return the equipment
after shipment for credit, credit will not be issued if
equipment is damaged or if equipment is returned after
four (4) months of shipment. If equipment is not
damaged, then equipment can be returned after issuance
of a Return Meter Authorization (RMA) by LANDTEC.
Returned package must be insured by customer and
must reference proper RMA# on outside of package, or
package may be rejected (i.e., package will be returned
GENERAL TERMS AND CONDITIONS
unopened). Credit Card customers will be charged a 30%
Detailed General Terms and Conditions can be found on the
Customer is responsible for return shipping charges and
LANDTEC website (WWW.LANDTECNA.COM).
re-stocking fee (70% balance will be credited back).
any damage if improperly packaged.
continued on next page
REV. 16-LIA/LRA
50
LANDTEC
4) If a non-credit card customer decides to return
the equipment after shipment for credit, credit will not be
issued if equipment is damaged or if equipment is
returned after 1 month of shipment, unless authorized by
a representative at LANDTEC. The LANDTEC
representative will issue a Return Material Authorization
(RMA) at that time and will advise of the restocking fee.
Returned package must be insured by customer and
must reference proper RMA# on outside of package, or
package may be rejected (i.e., package will be returned
unopened). Customer is responsible for return shipping
charges and any damage if improperly packaged.
REV. 16-LIA/LRA
Operations and Instruction Manual
LANDTEC
Operations and Instruction Manual
RETURNING YOUR LANDTEC METER
A Return Material Authorization Number (RMA#) must be
obtained prior to returning any equipment to LANDTEC for
any reason. RMA#s may be obtained by calling LANDTEC at
800-LANDTEC or 909-783-3636 between 8:00 am and 5:00
pm Monday through Friday.
A LANDTEC RMA Form (see page 52) must be filled out and
included with the meter being returned to
LANDTEC.
51
1. The equipment must be completely cleaned and
decontaminated prior to shipment to LANDTEC. This
decontamination includes the sensor, probe, electronics
and enclosures internally and externally. All packaging
must be clean and free from contamination.
2. A Material Safety Data Sheet (MSDS) is required for all
process fluids and gases that have been in contact with
the equipment. This includes fluids or gases used in
cleaning the equipment. A Decontamination Statement is
also required for each meter returned using a different
Take special care when packaging your meter for return to
gas or fluid. Both the MSDS and the Decontamination
if not prevented from shifting around within the package and
shipping container. If both documents are not attached,
the factory. The sensor in particular may easily be damaged
if the sensor itself is not covered to keep it from contacting
other package contents. Any damage resulting from
improper packaging is the responsibility of the shipper.
A purchase order is required prior to an RMA being issued.
Most repairs or recalibrations can be quoted over the phone.
For equipment that must be evaluated, an Evaluation
purchase order in the amount of $150 is required. Once an
evaluation is completed and a quote has been issued, you
can choose to proceed with the work or have the unit
returned with only the evaluation and freight fee billed.
In accordance with the “Right to Know Act” and applicable
US Department of Transportation (DOT) regulations,
Statement are to be attached to the OUTSIDE of the
you will be called, and the equipment sent back to you at
your expense.
3. The decontamination Statement must include the
following required information
A. A list of all chemicals and process fluids used in the
equipment, including decontamination fluids or gases.
B. The model and serial number of the equipment being
returned.
C. A company officer or other authorized person’s
signature on the statement.
LANDTEC will not accept delivery of equipment that has been
Return Shipping Address:
and has instituted the following Return/Repair conditions.
850 SOUTH VIA LATA, SUITE 112
contaminated without written evidence of decontamination,
Strict adherence to these conditions is required. Returned
equipment that does not conform to the requirements listed
LANDTEC NORTH AMERICA
COLTON, CA 92324
below will not be processed. If LANDTEC finds evidence of
contamination, we may, at our option, have the unit
returned at your expense. For your reference, the
requirements for packaging and labeling hazardous
substances are listed in DOT regulations 49 CFR 172, 178,
and 179.
REV. 16-LIA/LRA
52
Operations and Instruction Manual
LANDTEC
RETURN MATERIAL AUTHORIzATION
RMA #
Date
RETURN CUSTOMER INFORMATION
Customer’s Name
Fax #
Customer’s Contact Name
Phone #
Email Address
CUSTOMER’S RETURN ADDRESS
Bill to:
ship to:
RETURN pRODUCT INFORMATION
Model No.
serial No(s).
FLOW:
MIN
NORMAL
MAX
TEMP:
MIN
NORMAL
MAX
PREssURE:
MIN
NORMAL
MAX
GAs
LINE sIZE
REASON FOR RETURN / DESCRIpTION OF SYMpTOMS
(All non-warranty repairs could be subject to a minimum evaluation charge)
Recommended steps to be used to duplicate problem/symptoms
LANDTEC Technical Contact
Take special care when packaging your meter for return to the factory. The sensor in particular may easily
be damaged if not prevented from shifting around within the package and if the sensor itself is not
covered to keep it from contacting other package contents. Any damage resulting from improper
packaging is the responsibility of the shipper.
LANDTEC NORTH AMERICA
850 sOUTH VIA LATA, sUITE 112 / COLTON, CALIFORNA 92324
PHONE: 800-LANDTEC / FAX: 909-825-0591
REV. 16-LIA/LRA
Section
F
MODBUS
LANDTEC
Operations and Instruction Manual
55
Modbus Register Listing
LANDTEC ACCU-FLO REV. 1.80–2.07
UINt32
IEEE float
Reg
Offset
Reg
Offset
SCALED INt32*
type
Reg
Offset
type
Reg
Description
UINt32
IEEE float
SCALED INt32*
Reg
Offset
Reg
Offset
type
Reg
Offset
Reg
Description
type
256
UINt8
format flag
550
fLOAt
806
iir filter coeff
256
UINt8
modbus_unit_id
552
fLOAt
808
flow_min
257
UINt8
output mode sel
554
fLOAt
810
flow_max
257
UINt8
fix_pt selection
556
fLOAt
812
PULSE COUNt
257
UINt1
bRun
558
fLOAt
814
temp_max
257
UINt1
btotal
302
UINt16
dac1_min
257
UINt1
bEEProm
304
UINt16
dac1_max
257
UINt1
bReset
306
UINt32
serial number
257
UINt1
bLeadEn
308
ASCII
RAtE string
257
UINt1
bDACIo
310
ASCII
tOtAL string
257
UINt1
bDAChi
312
UINt32
current totalizer
514
fLOAt
770
LONG
CAL_VAL
314
UINt32
ADC0
516
fLOAt
772
LONG
K-fACtOR
316
UINt32
ADC1
518
fLOAt
774
LONG
VREf
318
UINt32
ADC2
520
fLOAt
776
LONG
LOAD-RES
320
UINt32
ADC3
tEMP
522
fLOAt
778
LONG
COEff A
578
fLOAt
834
LONG
current flow
tEMP
524
fLOAt
780
LONG
COEff B
580
fLOAt
836
LONG
current temp
tEMP
526
fLOAt
782
LONG
COEff C
582
fLOAt
838
LONG
rtd_mWatts
tEMP
528
fLOAt
784
LONG
COEff D
584
fLOAt
840
LONG
rtd_res
530
fLOAt
786
LONG
DISP A
586
fLOAt
842
LONG
ref_res_r
532
fLOAt
788
LONG
DISP B
588
fLOAt
844
LONG
ref_res_d
534
fLOAt
790
LONG
DISP C
590
fLOAt
846
LONG
dac_smooth
536
fLOAt
792
LONG
DISP D
592
fLOAt
848
LONG
lead
fLOW
538
fLOAt
794
LONG
COEff A
594
fLOAt
850
LONG
oheat
fLOW
540
fLOAt
796
LONG
COEff B
596
fLOAt
852
LONG
bv
fLOW
542
fLOAt
798
LONG
COEff C
598
fLOAt
854
LONG
fv
fLOW
544
fLOAt
800
LONG
COEff D
600
fLOAt
856
LONG
tv
fLOW
546
fLOAt
802
LONG
COEff E
602
fLOAt
858
LONG
lv
fLOW
548
fLOAt
804
LONG
COEff f
*SCALED INT32 register contents form INT32 values by multiplying the IEEE FLOAT x 1000
ex. FLOAT –> 112.768 = SCALED INT32 –> 112768
REV. 16-LIA/LRA
56
Operations and Instruction Manual
LANDTEC
LANDTEC Modbus protocol Rev. 1.80–Rev. 2.07
LANDTEC ACCU-FLO Meters support communication with
other devices via MODBUS® protocol using RTU transmission
ADDRESS FIELD
mode. The Modbus protocol defines a message structure
that controllers will recognize and use, regardless of the type
Meters will transmit response packets to addresses which
are between 1 to 240 decimal (inclusive). Modbus packet
of networks over which they communicate. It establishes a
common format for the layout and contents of message
fields. Transactions use a master-slave technique, in which
The address field contains one byte. LANDTEC ACCU-FLO
writes may be sent to broadcast address 00, however the
ACCU-FLO will not reply with a response packet.
only one device (the master) can initiate transactions (called
FUNCTION CODE FIELD
the requested data to the
titled Function Codes Supported by LANDTEC ACCU-FLO.
queries). The other devices (the slaves) respond by supplying
master and by taking the action requested in the query.
LANDTEC Meters operate as slaves to other Modbus devices
and default to 19200-8-E-1, however, the
following modes may also be software selectable:
9600-8-N-1
9600-8-E-1
9600-8-O-1
19200-8-N-11
19200-8-E-1
19200-8-O-1
(Baud-Bits-Parity-stop)
DATA FIELD
The data field contains four or more bytes. This information
is used by the Meter to take the action defined by the
function code, or to read or write data to one or many
registers.
CRC FIELD
(Default)
MESSAGE FRAMING
Messages start with a silent interval of at least 3.5 character
times followed by 4 fields and then followed by another
silent interval of at least 3.5 character times. The first field
contains the device address. The second field contains the
function code. The third field contains the data and byte
counts. The fourth field contains the CRC value.
1 Parity on the wireless Devices manufactured by Obvius is “None” rather than “Even”. The LANDTEC
default is 19200-8-E-1. Change to 19200-8-N-1 for the Obvius Modhoppers and related wireless
devices.
REV. 16-LIA/LRA
The function code field contains one byte. See the section
The CRC-16 (cyclical redundancy check) field is two bytes,
containing a 16-bit binary value. The CRC value is calculated
by the transmitting device, which appends the CRC to the
message. The receiving device recalculates a CRC during
receipt of the message, and compares the calculated value to
the actual value it received in the CRC field. If the two values
are not equal, the message will be discarded.
LANDTEC
Operations and Instruction Manual
57
Function Codes Supported by LANDTEC ACCU-FLO
03 (0X03) READ HOLDING REGISTERS
16 (0x10) WRITE REGISTERS
described below, except READ only.
meter. LANDTEC ACCU-FLO values are typically 32 bits wide
Identical operation as code 04 READ INPUT REGISTERS
04 (0X04) READ INpUT REGISTERS
Reads the binary contents of the specified register. This is
READ/WRITE register. LANDTEC ACCU-FLO values are
typically 32 bits wide (4 bytes) and contain a single IEEE754
floating point value. Modbus registers are
Writes the binary contents of the specified register into the
(4 bytes) and contain a single IEEE754 floating point value.
Modbus registers are 16 bits wide (2 bytes) so a minimum of
2 Modbus registers are required to transfer all floating point
bits into the meter. See section titled LANDTEC Floating Point
Format.
16 bits wide (2 bytes) so a minimum of 2 Modbus registers
Query
bits to the master. See section titled LANDTEC Floating Point
the quantity of registers to be written.
are required to transfer all floating point
Format.
The query message specifies the starting register address and
16 (0x10) WRITE MULTIPLE REGIsTERs
Query
The query message specifies the starting register address and
the quantity of registers to be read.
0x03 READ MULTIPLE HOLDING REGIsTERs or
0x04 READ MULTIPLE INPUT REGIsTERs
–QUERY–
sA – sLAVE ADREss
04 – FUNC CODE
RH – REG ADDR HI
RL – REG ADDR LO
00 – # OF REGs HI
CT – # OF REGs LO
CH – CRC MsB
CL – CRC LsB
–REsPONsE–
sA
04
BC – # of data bytes to follow
DATA0
DATA1
DATAn
CH CRC MsB
CL CRC LsB
REG ADDR HI (RH) is set to:
01 for INTEGER access of integral values
02 for IEEE754 floating point
03 for scaled (x1000) long integer of floating point value
REG ADDR LO (RL) is the starting address index into the register
structure. see section titled LANDTEC Register Index Values.
–QUERY–
sA – sLAVE ADREss
0x10 – FUNC CODE
RH – REG ADDR HI
RL – REG ADDR LO
00 – # OF REGs HI
CT – # OF REGs LO
BC – BYTEs COUNT
DATA0
DATA1
DATAn
CH – CRC MsB
CL – CRC LsB
–REsPONsE–
sA
0x10 – 16 FUNC CODE
RH – REG ADDR HI
RL – REG ADDR LO
00 – # REGs HI
CT – # REGs LO
CH – CRC MsB
CL – CRC LsB
REG ADDR HI (RH) is set to:
01 for INTEGER access of integral values
02 for IEEE754 floating point
03 for scaled (x1000) long integer of floating point value
REG ADDR LO (RL) is the starting address index into the register
structure. see section titled LANDTEC Register Index Values.
CT is the register count needed to transfer data. Typically this byte is
set to 02 to request 1 full IEEE754 floating point value.
BC is the actual number of bytes that follow.
CT is the register count needed to transfer data. Typically this byte
is set to 02 to request 1 full IEEE754 floating point value. (Modbus
single registers are 16 bits wide, LANDTEC floating point values are
32 bits wide.)
DATA0-DATAn are bytes in binary format transmitted to the slave
device representing the contents of the selected register(s).
DATA0-DATAn are bytes in binary format returned from the slave device
representing the contents of the selected register(s).
NOTE: values indicated with 0x prefix are in hexadecimal,
otherwise in decimal notation.
REV. 16-LIA/LRA
LANDTEC
Operations and Instruction Manual
58
NOTE: THIS pAGE AppLIES TO REV. 1.81–1.83
17 (0x11) REpORT SLAVE IDENTIFICATION*
ILLEGAL FUNCTION CODES*
a detailed identification packet with a run status, and
function codes not documented in this revision, these codes
This query requests from the specified slave address
LANDTEC ACCU-FLO and firmware revision response. (ACCUFLO will not respond to broadcast slave address 00.)
Query
The query message specifies the slave address, function
code, and CRC check words.
17 (0x11) REPORT sLAVE ID
–QUERY–
sA – sLAVE ADREss
11 – FUNC CODE
CL – CRC LsB
CH – CRC MsB
–REsPONsE–
sA
11
BC – BYTEs COUNT, 19
sD – sLAVE ID (DEVICE sPECIFIC), 0x5A
Rs – RUN sTATUs INDICATOR, 0xFF
AsCII Text – LANDTEC ACCU-FLO v1.81x
CH
CL
Response
The LANDTEC ACCU-FLO will respond with an echo of the slave
address and function code. The byte count will be 19 (0x13) to allow
the master to account for all the remaining bytes that follow.
REPORT sLAVE ID Example: (slave Address = 0x30 = 48, default)
Master Query –> 30 11 D5 BC
ACCU-FLO Response
–>
30 11 13 5A FF 53 61 67
65 20 50 72 69 6D 65 20
76 31 2E 38 31 20 F1 2B
AsCII translation–> LANDTEC ACCU-FLO v1.81
The LANDTEC ACCU-FLO will respond to other Modbus
are considered unsupported by LANDTEC. Unsupported
function codes will cause the ACCU-FLO to reply with
Modbus ILLEGAL FUNCTION status.
LANDTEC REGISTER INDEX VALUES
DATA
TYPE
Byte
float
float
float
float
float
integ
VALUE
slave_ad
flow_rate;
flow_temp;
rtd_mWatts;
rtd_res;
ref_res_r;
totalizer;
sIZE
1 BYTE
1 IEEE754
1 IEEE754
1 IEEE754
1 IEEE754
1 IEEE754
1 uLONG
INDEX
1
578
580
582
584
586
312
ADDREss
DEsCRIPTION
Modbus slave Address*
actual flow rate
process temperature
sensor power reading
actual sensor probe resistance
actual temperature probe resistance
actual displayed total
*NOTE: LANDTEC ACCU-FLO Meters are factory programmed with the MODBUS slave address = 48 (0x30). It may be extremely useful to be able to write to an unknown slave address with a simple broadcast
command. Be sure only one LANDTEC ACCU-FLO is connected during any broadcast writes using slave address = 0.
Writing into unspecified registers (not defined above) can
render the unit non-functional or overwrite factory
calibration data yielding incorrect operation.
EXAMpLE MODBUS pACkET
Query
This packet will request of the addressed slave to respond by
sending back the contents of registers 578 to 582 (inclusive).
Three registers: flow rate through RTD mWatts in IEEE754
floating point
format.
*Not implemented in revision 1.80
0x31 – LANDTEC ACCU-FLO sLAVE ADDREss (0x31 Hex = 49 Decimal
default)
0x04 – READ INPUT REGs FUNCTION CODE
0x02 – sTARTING REGIsTER HI BYTE (0x01 = 256, 0x02 = 512, 0x03 = 768)
0x42 – sTARTING REGIsTER LO BYTE (512 + 66 = register access = 578)
0x00 – COUNT MsB (ALWAYs ZERO)
0x06 – COUNT OF ALL DEsIRED REGIsTERs
0xD5 – CRC HI BYTE
0x85 – CRC LO BYTE
LANDTEC
Operations and Instruction Manual
59
LANDTEC Register Output Format
INTEGER REpRESENTATION
Computer systems hosting a MODBUS network
typically store integer values to represent non-
fractional quantities.
All registers addressed above 256 (0x0100-0x1FF) will
transfer 16 bit integral quantities in response to all master
master queries. MODBUS requires
that two 16 bit registers are transmitted to ensure that no
bytes are missing in the transmission of
32 bit quantities.
For more information on the MODBUS protocol, see:
http://www.modbus.org/tech.php
queries. MODBUS requires that the register count reflects
LANDTEC ADDRESSER SOFTWARE
missing in the transfer of integer quantities. (Note: Most
Addresser software, as well as an optically isolated ULINX
each 16 bit registers transmitted to ensure that no bytes are
Addresser is a convenient software kit that includes
LANDTEC ACCU-FLO registers are IEEE754 quantities; integer
RS485 to USB converter. The Addresser is a READ/WRITE
translation.)
interface between your PC or laptop and the Modbus
representations of these registers will require significant
IEEE754 FLOATING pOINT
Computer systems hosting a MODBUS network typically
Program with drop-down menus for convenient user
Terminals of the LANDTEC ACCU-FLO. Contact LANDTEC for
ordering information and instructions.
store single precision floating point data in the standard
IEEE754 format.
All registers addressed above 512 (0x0200-0x02FF) will
transfer full 32 bit single precision quantities
in response to all master queries. MODBUS requires that two
16 bit registers are transmitted to ensure that no bytes are
missing in the transmission of
32 bit quantities.
SCALED DECIMAL REpRESENTATION
Computer systems hosting a MODBUS network may choose
represent single precision floating point values as scaled long
integers (32 bit values). The LANDTEC ACCU-FLO will convert
floating point registers to integral units by multiplying the
value by 1000.
Ex. Floating point value 1234.567 will be converted to
integral value 1234567
All registers addressed above 768 (0x0300-0x03FF) will
transfer full 32 bit scaled integer quantities in response to all
REV. 16-LIA/LRA
60
LANDTEC
Operations and Instruction Manual
LANDTEC Addresser Typical printout (Version 3.14)
Units: SCFM Modbus:
0x31
Copyright 2014, LANDTEC NORTH AMERICA, INC.
REV. 16-LIA/LRA
1 of 1
Section G
G
AppENDIX
LANDTEC
Operations and Instruction Manual
64
LANDTEC ACCU-FLO Field Programmable “Dongle”
Although virtually any setting on LANDTEC ACCU-FLO can
be changed by users who have Modbus® capability (see
pages 19 and 22 for terminal connections), not all customers
upload the data from the appropriate Dongle. It only takes a
few seconds to do so.
have that capability to communicate with the ACCU-FLO
Dongles come with a convenient well marked cable that is
However, users do not need to have a Modbus host or any
cover, connect the Dongle, and push the button on the
using its Modbus Compliant RS485 Communications.
special skill, since they can also change configurations in the
field by using the patent pending LANDTEC “Dongle”.
The LANDTEC ACCU-FLO device known as a “Dongle”, was
developed to facilitate making changes on LANDTEC ACCU-
FLO Flow Meter settings in the field. Simply contact LANDTEC
and specify your requirement (such as the new Full Scale,
connected to the RS485 terminals. Simply remove the rear
Dongle. An LED will illuminate, and within 3 seconds the light
will go out signaling that the data transfer is complete.1
Remove the Dongle, close the cover, and you will notice that
the new settings have been uploaded (or in the case of a
Totalizer-Reset Dongle, you will notice that the Totalizer has
zeroed).
new Pipe Area, etc), and the device will be programmed at
LANDTEC and sent directly to you within a few days (there is
a slight fee for this service). The patent-pending Dongle can
also be configured as a Reset Totalizer device (i.e. it can be
used repeatedly, with any LANDTEC ACCU-FLO to easily reset
the Totalizer). The Dongle can also be programmed to
change Engineering Units, Filter Response and numerous
other parameters.
In fact, Dongles can also be used to provide multiple gas
calibrations. In this case, the requirements must be specified
at the time of ordering. For example, one meter can be
calibrated for four different gases with totally different
calibration ranges, by providing four Dongles with the Flow
Meter. When a different gas calibration is needed, simply
1 If the light does not go out, it will be necessary to repeat procedure. Remove finger for a few seconds
and then push button again.
REV. 16-LIA/LRA
65
LANDTEC
Correction Factors For
Variation From Original
Digester Gas Calibration
Operations and Instruction Manual
Installations Where pipe
Condensation May Develop
LANDTEC can calibrate for any Digester Gas, Bio Gas or
Landfill Gas Mix. However, it may be helpful to have
correction factors for a typical calibration, in the event that
the composition changes after delivery. The following
examples assume that the initial calibration was set up for
60% CH4 and 40% CO2.
a) 65% CH4 and 35% CO2: Multiply reading by 0.982 to
correct it for new composition
b) 70% CH4 and 30% CO2: Multiply reading by 0.965 to
correct it for new composition
c) 55% CH4 and 45% CO2: Multiply reading by 1.0185 to
correct it for new composition
For smaller changes, the corrections are linear in between
d) Also, if 100% saturated with H2O vapor (noncondensing), multiply readings by 1.042
e) If 50% saturated with water, multiply reading by 1.021
(Water vapor correction is linear in between)
Also, use the 45 degree mounting method in order to avoid
droplets from hitting the sensor and causing spikes (see
above right)
REV. 16-LIA/LRA
TILT ENCLOSURE 45º
(forward or backward)
FOR APPLICATIONS
WHERE CONDENSATION
MAY DEVELOP ON INSIDE
WALL OF PIPES
LANDTEC
Operations and Instruction Manual
66
J-Box and Upstream Orientation
FRONT VIEW
LOOKING DOWNSTREAM
LOOKING UPSTREAM
4.40
2.72
2.72
5.0
5.0
FLOW DIRECTION
FLOW DIRECTION
FLOW DIRECTION
REV. 16-LIA/LRA
67
LANDTEC
Operations and Instruction Manual
What is a Thermal Mass Flow Meter?
• What is a Thermal Mass Flow Meter? It is a meter that
directly measures the gas mass flow based
on the principle of conductive and convective
heat transfer.
• All Meters have probes (Insertion Style) or Flow Bodies (InLine Style) that support a pair of
sensors, which are in contact with the gas.
• The sensors are RTDs, which are resistance temperature
detectors. They consist of highly stable reference-grade
platinum windings. In fact, we
use the same material that is used as Platinum Resistance
Standards at the NIST.
• The RTDs are clad in a protective 316 SS sheath
for industrial environments.
circuitry maintains a constant overheat between the flow
sensor and the reference sensor. As gas flows by the
heated sensor (flow sensor), the
molecules of flowing gas carry heat away from
this sensor, and the sensor cools down as it loses energy.
The circuit equilibrium is disturbed, and momentarily the
temperature difference between the heated sensor and
the reference sensor has changed. The circuit will
automatically (within
1 second) replace this lost energy by heating
up the flow sensor so the overheat temperature
is restored.
• The current required to maintain this overheat represents
the mass flow signal. There is no need for external
temperature or pressure devices.
• One of the RTDs [See Diagram below] is self-heated by the
circuitry and serves as the flow sensor. The other RTD acts
as a reference sensor, and measures the gas temperature.
Essentially it is used for temperature compensation.
• The LANDTEC proprietary hybrid-digital sensor drive
FLOW SENSOR
(Self Heated)
TEMPERATURE SENSOR
(Reference Sensor)
REV. 16-LIA/LRA
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