Tek-Trol 1620A-0080-A-01-A-01-C0-D-00-03-A-XX-A-01-A, 1620A-0100-C-01-B-02-C0-D-00-03-A-XX-A-01-A, 1620A-0100-C-09-B-03-C0-D-00-03-A-XX-A-01-A, 1620A-0050-C-09-B-03-C0-D-00-03-A-XX-A-01-A, 1620A-0080-C-09-B-03-C0-D-00-03-A-XX-A-01-A User manual

Technology Solutions

T

EK-DP

Cone Meter

FLOW

Flow | Level | Temperature | Pressure | Valves | Analyzers | Accessories | TekValSys

1620A

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Table of Contents

1

Safety Instructions ....................................................................................................................... 3

1.1

1.2

1.3

Intended Use ...................................................................................................................................... 3

3

Safety Instructions from the Manufacturer ......................................................................................... 3

1.3.1

1.3.2

1.3.3

Disclaimer ............................................................................................................................................ 3

3

Information Concerning the Documentation ...................................................................................... 3

1.4

1.5

Safety Precautions .............................................................................................................................. 3

Packaging, Transportation and Storage ............................................................................................... 4

1.5.1

1.5.2

1.5.3

1.5.4

Packaging ............................................................................................................................................. 4

5
5

Nameplate ........................................................................................................................................... 5

2

Product

Description

...................................................................................................................... 6

2.1

2.6

Introduction ....................................................................................................................................... 6

6
6
7
8

System Components ........................................................................................................................... 9

2.6.1

2.6.2

2.6.3

2.6.4

2.6.5

2.6.6

2.6.7

Differential Pressure Transmitters ....................................................................................................... 9

9

9
10
10
10

Tubing Lengths and Configurations ................................................................................................... 10

2.7

2.15

Very High Temperature Applications ................................................................................................. 11

11
12
12
12
12
12
13

Liquid Service Meter Installation ....................................................................................................... 13

2.15.1

2.15.7

Meter Orientation ............................................................................................................................. 13

13
13
14
14
14

Horizontal Meter Installation for Wet Gas ........................................................................................ 15

2.16 Cone Meter Installation - Hot Gases / Steam ..................................................................................... 16

16

2.16.2 Sensing /Impulse Tubing Orientation ................................................................................................ 16

Certifications ......................................................................................................................................

Product Liability and Warranty ............................................................................................................

Transportation .....................................................................................................................................

Storage ................................................................................................................................................

2.2

2.3

2.4

2.5

2.8

2.9

2.10

2.11

2.12

2.13

2.14

Usage and DP Applications ..................................................................................................................

Main Meter Components ....................................................................................................................

Measuring

Operation ...........................................................................................................................................

Very Cold
Best Practices for Installing the Tek-DPro Cone

Flow Run Requirements ....................................................................................................................

Meter Orientation and Transmitter Position .....................................................................................

Pressure Tap Location .......................................................................................................................

For horizontal installations, the following installation guidelines apply .............................................

Points to check for the Transmitter / Meter

Principle

Shut-Off Valves ....................................................................................................................................

Valve Manifolds ...................................................................................................................................

Impulse Tubing Considerations .........................................................................................................

Tubing Size Selection .........................................................................................................................

Process Tubing / Sensing

Temperatures

.............................................................................................................................

Lines

...........................................................................................................

....................................................................................................................

Meter

........................................................................

Installation

.....................................................................

2.15.2

2.15.3

2.15.4

Find Quality Products Online at: [e-mail]

2.15.5

2.15.6

2.16.1 Orientation ........................................................................................................................................

Pipe

Orientation

Wall Taps ...........................................................................................................................................

Condensate Chamber or Drip Pot ......................................................................................................

Horizontal Installation for Liquids......................................................................................................

Vertical Installation for

.................................................................................................................................

liquids

...........................................................................................................

www.GlobalTestSupply.com

2.16.3 Condensate Chambers ....................................................................................................................... 16

2.16.4 Horizontal Service Applications – Steam / Hot Gases ....................................................................... 16

2.17

2.18

2.22

Specifications .................................................................................................................................... 17

18
18
19
19

Model Charts .................................................................................................................................... 22

3

Installations ............................................................................................................................... 25

3.1

General Instructions.......................................................................................................................... 25

3.1.1

Before installing a Tek-DP 1620A Cone Meter, review the following installation tips: ..................... 25

3.2

Installation for Gases ........................................................................................................................ 25

3.2.1

3.2.2

Horizontal Installation Gases ............................................................................................................. 25

Vertical Installation Gases ................................................................................................................. 26

3.3

Installation for Liquids ...................................................................................................................... 27

3.3.1

3.3.2

Horizontal Installations

Liquids

.......................................................................................................... 27

Vertical Installations Liquids .............................................................................................................. 27

3.4

Installations for Steam ...................................................................................................................... 29

3.4.1

3.4.2

Horizontal Installation for Steam ....................................................................................................... 29

Vertical Installation for Steam ........................................................................................................... 29

3.5

Installation for Upstream and Downstream ....................................................................................... 30

4 5 Maintenance ............................................................................................................................. 31

Troubleshooting ......................................................................................................................... 32

2.19

2.20

2.21

Transmitters or Flow
Cone Meter
Process
Dimensional

Designs

Connections

Drawings

Computers

..........................................................................................................................

..........................................................................................................................

.......................................................................................................................

........................................................................................................

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

1 Safety Instructions

1.1

Intended Use

Tek-DP 1620A Cone Meter is measures flow over a wide range of Reynolds numbers of gas,

steam

and liquid applications.

1.2

Certifications

ISO 5167-5 Compliance.

1.3

1.3.1

Safety Instructions from the Manufacturer

product,

Any product purchased from the manufacturer is warranted in accordance with the relevant

disclaimer,

e for any reason without prior notice, and will not be answerable in any way for the

possible consequence of such changes.

1.3.2

Product Liability and Warranty

The
manufacturer accepts no liability for the consequences of misuse by the operator. Wrong
installation or operation of the devices (systems) will cause the warranty to be void. The

s the basis for the sales contract shall also

apply.

1.3.3

Information Concerning the Documentation

To prevent any injury to the operator or damage to the device it is essential to read the

national standard safety instructions. This
operating manual contain all the information that is required in various stages, such as product
identification, incoming acceptance and storage, mounting, connection, operation and
commissioning, troubleshooting, maintenance, and disposal.

1.4

Safety Precautions

These

by

well

For additional information that are not discussed in this manual, contact the manufacturer.

Disclaimer

The manufacturer will not be held accountable for any damage that happens by using its
including, but not limited to direct, indirect, or incidental and consequential damages.

product documentation and our Terms and Conditions of Sale.
The manufacturer has the right to modify the content of this document, including the
at any tim

The operator shall bear authority for the suitability of the device for the specific application.

respective Terms and Conditions of Sale, which form

information in this document and the applicable

You must read these instructions carefully prior to installing and commissioning the device.
instructions are an important part of the product and must be kept for future reference. Only
observing these instructions, optimum protection of both personnel and the environment, as
as safe and fault-free operation of the device can be ensured.

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Warnings and Symbols Used

The following safety symbol marks are used in this operation manual and on the instrument.

WARNING

Indicates a potentially hazardous situation which, if not avoided, could result in
death or severe injury

CAUTION

Indicates a potentially hazardous situation which, if not avoided, may result in
minor or moderate injury. It may also be used to alert against unsafe practices.

NOTE

Indicates that operating the hardware or software in this manner may damage it
or lead to system failure.

1.5

1.5.1

Packaging, Transportation and Storage

Packaging

The original package consists of

1.

2.

Tek-DP 1620A Cone Meter
Documentation Package NDT and Materials Certificates

NOTE

Unpack and Check the contents for damages or sign of rough handling. Report

packing

list provided.

damage to the manufacturer immediately. Check the contents against the

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

1.5.2

Transportation

•

Avoid impact shocks to the device and prevent it from getting wet during

transportation.

whenever possible.

1.5.3

Storage

precautions:

•

Store your product in the manufacturer’s original packing used for shipping.
Storage location should conform to the following requirements:

1.

3.

Free from rain and water ingress

At room temperature with minimal temperature and humidity variation

Properties of the instrument can change when stored outdoors (carbon steels).

1.5.4

Nameplate

details

and technical data.

NOTE

Check the device nameplate to ensure that the device is delivered according to your
order. Check for the correct Beta Ratio, Pipe ID, and TAG number if printed on the

nameplate. Flow Meter Coefficient of discharge

(Cd)

is shown on the materials

certification / documentation for entry into a flow computer

Verify local safety regulations, directives, and company procedures with respect to

•

hoisting, rigging, and transportation of heavy equipment.
Transport the product to the installation site using the original manufacturer’s packing

•

If this product is to be stored for a long period of time before installation, take the following

•

2.

Free from vibration and impact shock

•

The nameplate lists the order number and other important information, such as design

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

2

2.1

Product Description

Introduction

DP 1620A Cone Meters are manufactured and designed for measuring multiple fluid types

from gases to liquids and vapors, the meter uses differential pressure to provide accurate,

variable

transmitter in conjunction with a flow computer in certain world regions chart recorders are still

product

This operator

e Meter in

liquid, gas, and steam applications.

2.2

Usage and DP Applications

DP 1620A Cone Meters are fully capable and designed to work in both unprocessed and

processed applications, and are ideal for upstream, midstream and downstream flow

pressure

validation

detailed within the company website.

2.3

Main Meter Components

The cone meter comprises three main components, as shown in Figure 1 & Figure 2.

i.

ii.

Meter body or tube (closed conduit) with or without flanges

block

downstream with a

pressure sensing conduit for reading differential pressures at the center of the cone and

tap may be used under certain process

Tek-DP 1620A Cone Meters can be manufactured from various materials (Carbon-

iii.

All

A105/106/LF350 steels etc., stainless, or duplex stainless steel) to meet specific process

natural gas steam, air, nitrogen, ethanol, digester gas and a host of

products.

DP 1620A Cone Meter is manufactured to meet the ISO 5167 Part 5 DP Cone Meter

geometry is
used for other cone meter types with certain exceptions such as wall taps for vertical flow
orientations and extra taps for smart metering operations.

Tek-

repeatable and low cost of ownership measurement solutions.

All Tek-DP 1620A Cone Meters read flow rates by using by a differential pressure or multi-

used which will operate with a cone meter.
The method used to connect the transmitter to the meter varies, depending on the type of
measured and available space for mounting the meter in the supporting pipework.
manual provides installation instructions and some piping diagrams for using the Con

Tek-

measurement applications that present large measurement challenges.
The Tek-DP 1620A Cone Meters is also available in many different configurations for low­coalbed/seam methane wellhead, High /low pressure separator, wet gas with Tek DPro
systems steam and other field applications, compressor anti-surge control, and fuel gas as

Differential Pressure Cone assembly, either fabricated or machined from a mono­stainless/ other steel piece (not carbon) positioned in the center of the meter tube
A pair of pressure tapping’s - wall tap upstream and a sensing tap

meter body. (Note: a downstream wall­measurement conditions.)

requirements for metering:
hydrocarbon and non-Hydrocarbon liquids from crude oil to wastewater and cryogenic
The Tek-

Find Quality Products Online at: [e-mail]

Standard when applied for custody transfer applications the same dimensions and

www.GlobalTestSupply.com

Fig 1: Basic components of the Tek-DP 1620A Cone Meter

The Tek-DP 1620A Cone Meter has no moving parts, and is designed to ISO 5167 Part 5 Geometries.

There are no stagnation areas at the DP meter element where trash or fluid particles can lodge

which

resides downstream of the flow.

2.4

Measuring Principle

shape

flow measurement computer with

mal

also

is

proportional to the Square Root of the DP. The pipe area is based on the internal pipe diameter

the

beta ratio (β) for DP Cone Meters this is calculated as being:

Where, D is pipe Diameter.

d is Cone Diameter.

within the measurement section during normal flowing conditions.
The meter is virtually maintenance-free due to the self-cleaning action at the cone beta edge

The Tek-DP 1620A Cone Meter generates a differential pressure across a centrally fixed cone
that can be used to calculate fluid flow rates using ISO 5167 Part 5 published equations.
A DP / MVT transmitter measures the differential pressure and outputs an integrated electronic
signal, typically via standard Modbus or a 4-20 mA output to a
cone meter equations installed, or other process control tertiary device for readout and review.
For compressible fluids (gasses), line pressure and temperature measurements are required for
accurate flow rate calculations such as custody transfer applications as well as compensation for
any adiabatic changes in the meter expansion factor also detailed in ISO 5167 Part 5. During nor
operation process fluids flow around the differential producer cone, and pressure drop occurs
according to Bernoulli principles of conservation of energy. The static line pressure (P1) is
measured via a wall tap strategically located upstream of the cone (Figure 2). Pressure is
measured via a sensing tap that is connected to the cone center using a conduit and measures
pressure at a central point immediately downstream of the cone (P2). The fluid flow-rate is
calculated using the differential pressure (DP).
The principle of the conservation of mass and energy applies to cone meters thus, a flow rate Q

and the area reduction being the annulus area at the cone beta edge. This relationship is called

HP LP

DP Cone

Meter Body

2

β = 1 −

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

√

d

D

2

Fig 2: TEK-DP 1620A DP Cone Meter (Cutaway View – Flow Streams)

The meter differential producer cone element reshapes the fluid velocity profile directly upstream

and

across the expanding element conditioning flows naturally and eliminating the need for

be

meter

and high degrees of performance are ensured even under extremely disturbed flow conditions.

2.5

Operation

DPro DP Cone Meters are fabricated and assembled using ASME approved welding

qualifications and material certification available to 3.lb and 3.lc quality

requirements with full material traceability either in standard steels or exotics.

Fig 3: TEK-DP 1620A DP Cone Meter

TEK-DPro Cone Meters are manufactured with attention to their geometry and metrology based

may

occur at certain higher fluid ReD numbers.

traditional flow conditioners or long straight lengths. Tek-DP 1620A Cone Meter can therefore
installed in shorter meter runs than those required by a conventional differential pressure

All Tek­techniques. Welder

on ISO Standards. All up and downstream weld-neck seam welds are honed to provide smooth
entry & exit into and out of the cone meter measurement section.
This honing procedure minimizes fluid jetting effects entering the meter throat/annulus that

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

NOTE

Jetting effects occur where weld beads protrude into the flow stream and may cause

an over-

run of the flow conditioning effect provided by the meter DP element. This
effect is particularly evident on larger beta ratios, it is good practice to always
implement this operation in the manufacturing process of a cone meter

2.6 System Components

are typically required for the

condensate

pot may also be required.

2.6.1

Differential Pressure Transmitters

cone

gas,

and steam applications.

2.6.2

Shut-Off Valves

valve

NOTE

The valves must not affect the transmission of the differential pressure signal.

Install block valves next to the Tek-DP 1620A Cone Meter pressure taps. Never use a globe
valve for differential pressure transmission lines. (See: Figure 4)

Fig 4: Valve Connections

installed which does not affect the performance.

A transmitter, valve manifold, shut-off valves, and impulse tubing
operation of a Tek-DP 1620A Cone Meter. If the meter is used to measure steam, a

A differential pressure transmitter records the differential pressure signal generated by the
meter and provides an analog or serial output to a flow computer or data control system.
The transmitter(s) selected for an installation must be appropriate for operating conditions of
the process in terms of both accuracy and safety.
DP devices must be zeroed following installation. The procedure varies somewhat for liquid,

Choose a block valve that is rated for the operating pressure of the pipe in which it will be
installed. Where dangerous or corrosive fluids or gases like oxygen are likely, the block
and packing must provide ample protection.

Note: Some meters have rear gussets

2.6.3 Valve Manifolds

A 3-way or 5-way valve manifold isolates the transmitter from the process lines (5-valve
manifolds are recommended). They allow the operator to calibrate the transmitter without
removing it from the impulse tubing, drain the transmitter and impulse tubing or vent it to
atmosphere. (See Figure 5)

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Fig 5: Valve Manifolds

NOTE

Valve manifolds must be oriented according to manufacturer’s instructions to

prevent trapping of air or liquid in the sensing lines and tubing. This can cause an

incorrect flow measurement condition.

2.6.4

Impulse Tubing Considerations

DP 1620A Cone Meter and its transmitter,

consider the following installation advice for optimizing your system’s measurement accuracy.

vent

to the atmosphere”.

2.6.5

Tubing Size Selection.

DP 1620A Cone Meter tap holes to the transmitter have

a

and

also reduce plugging / freezing.

2.6.6

Process Tubing / Sensing Lines

must not exceed 1” (25 mm). For steam applications, the ID should

the

required

for flow signals used in process safety management. A minimum tubing ID of 5/8” (16 mm) is

in

condensing vapor service, 1” (25 mm) is preferred.

2.6.7

Tubing Lengths and Configurations

length

and tubing orientation:

•

Tubing lengths must be short enough to ensure a high degree of accuracy, and long enough

transmitters in case of maintenance and also emergency maintenance.

Before connecting impulse tubing between the Tek-

“In a well- designed installation, fluids will drain freely from the process lines and gases will

Impulse tubing that connects any Tek­diameters that change with service conditions. The bore should be no smaller than ¼” (6 mm)
minimum diameter of 3/8” (10 mm) is recommended to allow for any condensate drainage

The internal diameter (ID)
be in the range 3/8” (10 mm) to 1” (25 mm) depending on meter diameter.
The use of incorrect tubing both diameter and material selection can create a safety risk and
cost incurred to regaining a process system control can be substantial. High reliability is

recommended for these types of industrial applications were possible. For high temperatures

For best performance, please try to meet the following recommendations for tubing

to ensure proper cooling of high-temperature fluids before they reach the transmitter.
Make sure the installation permits access to impulse tubes, valves, valve manifolds, and

•

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

•

Limit the number of fittings and avoid long tubing sections, which can impair measurement

accuracy and increase the risk of plugging.

elevation

Temperature differences may cause a difference between the density of the fluids in the
two sensing lines, which will change the amount of differential pressure measured. Both

lines

be

bend and install

d or gas trap, as applicable. A liquid trap should be installed at the lowest point in a

service

installation.

• • •

2.7

Very High Temperature Applications

and

transmitters (200°F or 92°C Max). A condensate chamber / vessel can be used to isolate

effects. Alternatively, a long tube section can be

As a general operational guideline when planning tubing lengths for temperature control, run a

tion where possible, and allow for a temperature drop of 100°F (37.8°C)

NOTE

This is a rule of thumb guideline, the operator is still responsible for verification that

including the environmental conditions during operation.

2.8

Very Cold Temperatures

During cold temperature installations, thermal insulation and/or “heat tracing” of process lines

drop out in

sensing

prevent

vapors from producing unwanted condensation

dual phase conditions. Fastening process lines together is highly recommended to help keep

controlled

environmental conditions for the transmitter also helps to ensure accurate metering in locations

artic

circle regions).

Avoid changes in tubing elevation and fluid temperature if possible. Differences in
will cause differences in hydrostatic pressure of liquid columns in process/sensing lines.

can result in inaccurate differential pressure measurements. Fasten both process
together, if possible, to alleviate this type of issue.
Install process lines so that they slope in only one direction (up or down). If piping must
installed to slope in more than one direction, do not allow more than one
a liqui
gas service installation. A gas trap should be installed at the highest point in a liquid

Steam vapor can reach 1500°F (815°C), which exceeds the temperature rating of standard DP
pressure
the transmitter from extreme temperature
installed to allow the fluid to cool sufficiently before it reaches the transmitter.

horizontal tubing orienta
per foot (305 mm) of tubing.

the temperature at the transmitter does not exceed the transmitter’s thermal rating

may be necessary this is required where liquids are present or the possibility of liquid
a gas stream that sustains a freeze temperature to cause the liquid to solidify and block the
line. The amount of heat used to prevent these issues must be calculated carefully to also
liquids from vaporizing and prevent condensable

Find Quality Products Online at: [e-mail]

process lines approximately at the same temperature. Providing temperature-

where extreme temperature swings are likely (i.e., offshore platforms, desert installations or

www.GlobalTestSupply.com

2.9

Best Practices for Installing the Tek-DPro Cone Meter

WARNING

Read the best practice recommendations below in their entirety before installation of
the Tek-DPro Cone Meter.

The basic steps for installing a Tek-DPro DP Cone Meter system are described as follows.

1.

2.

3.

Install the meter in the meter run in accordance with the flow run requirements below.

Zero the transmitter.

4.

5.

2.10

Flow Run Requirements

2.11

Meter Orientation and Transmitter Position

horizontal or vertical position. The location of the

being

DPro Cone

of the

differential pressure tap.

2.12

Pressure Tap Location

through the pipeline (liquid, gas, or steam) and the orientation of the meter (vertical or horizontal).

2.13

For horizontal installations, the following installation guidelines apply:

•

For measuring liquid, differential pressure taps should be located in the bottom half of the

pipeline.

For wet gas, taps should be located between the 10 o’clock and 2 o’clock positions to allow

For steam, differential pressure taps should be located in the side of the pipeline.

• • Illustrations of typical piping configurations for liquid, gas, and steam are provided in figure 6.

Secure the manifold to the meter taps.
Connect the differential pressure transmitter to the manifold, observing the
recommended guidelines below for pressure measuring tubes.
Connect the transmitter to the flow computer according to instructions in the
transmitter user manual.

The Tek-DPro Cone Meter should be installed with zero to five pipe diameters of straight run
upstream of the meter and zero to three pipe diameters downstream. The meter can be used in
pipelines that are slightly larger than the meter tube; however, if the meter tube is larger than
the pipeline, operators should contact for installation requirements. This is usually
determined before supply according to application and the degree of accuracy and performance
required.

The Tek-DPro Cone Meter can be installed in a
transmitter with respect to the meter should be based on the properties of the fluid or gas
measured (gas, steam, liquid, etc.) and the direction of flow through the pipeline.
The direction of flow is clearly labeled on nameplate affixed to the body of every Tek­Meter shipped. The meter must be installed so that the static pressure is always upstream

Location of the static pressure and differential pressure taps will vary with the product flowing

pipeline, between 4 o’clock and 5 o’clock positions, or between 7 o’clock and 8 o’clock
positions.
For measuring gas, differential pressure taps should be located in the top half of the

Find Quality Products Online at: [e-mail]

proper drainage of liquids present.

www.GlobalTestSupply.com

For additional installation information, refer to ISO 5167 various parts (part 5 cone meters)

Fig 6. Standard Port Location for Horizontal Installation

2.14 Points to check for the Transmitter / Meter Installation

properly by reviewing the following checkpoints:

a.

c.

Is the transmitter full scale range correct?

pressure port

negative flow may show if incorrectly

mounted?

d.

g.

2.15 Liquid Service Meter Installation

2.15.1

Meter Orientation

a

prevent gas from being trapped in liquid differential pressure lines.

2.15.2

2.15.3

Wall Taps

the

pressure sensing port connected to the cone meter can become plugged with ice for such

measure

manufacturing

and selected as an option before supply).

or contact etc.

Before putting the Tek-DPro Cone Meter into service, verify that the transmitter is installed

b.

Has the transmitter zero been checked and/or adjusted (dead weight tested)?
Has the transmitter and flow computer been set to the correct operating mode “linear or
square root”?
Have the sensing lines to the transmitter been purged cleaned / blown with nitrogen?
Are there any leaks in the sensing lines?

e.

Is the manifold calibration cross valve closed?

f.

Is the Tek-DPro Cone Meter high pressure port located upstream of the low­and connected the correct way to the transmitter –

Tek-DPro Cone Meters can be installed both in a horizontal or vertical position.
Horizontal Installations are is the standard orientation, however where space is very limited,
vertical position may prove to be the best option.

Pipe Orientation

The orientation of piping is dictated by the position of the meter, the type of product being
measured, and for vertical meter installations, the direction of flow. When a vertical piping
system is used, the operator must give special consideration to the piping configuration to

Find Quality Products Online at: [e-mail]

In extremely cold environments where there is a risk of product freezing in the process lines,
low­installations, a downstream wall tap may be installed in the meter and should be used
the downstream differential pressure value. (Note this has to be installed during

www.GlobalTestSupply.com

This option will allow ice /hydrate blockage to be removed without removing the meter from

the meter run, but the meter run must be isolated and depressurized before attempting to

clean

out the blockage refer to earlier sections regarding this aspect.

2.15.4

Condensate Chamber or Drip Pot

avoid

impulse

tubing between the cone meter and the DP transmitter.

2.15.5

Horizontal Installation for Liquids

horizontal
centerline (4 o'clock to 5 o'clock or 7 o'clock to 8 o'clock). Taps at the bottom of the pipe may
also become plugged with solids from the liquid; taps above the centerline can accumulate air

nsing gases. For liquid service, the connecting sensing lines from the meter

to the transmitter shall slope downward towards the transmitter with no U bends or

foot

as from various national standards documentation.

Fig 7. Installation - Liquid measurement (Horizontal Cone Meter)

2.15.6

Vertical Installation for liquids

exists

in a liquid service, even if the liquid is water. As a result, the piping configuration must be

should be extended

-

foot angle to the top of the manifold block. The manifold block should be mounted

slopes

downward also.

Condensate chamber (drip pot) is a collection vessel recommended in certain standards to
gas bubbles in liquid instrument tubing. It should be mounted at the highest point in the

For horizontal installations, pressure taps must be positioned at 30° to 60° below the

locks or non-conde

opportunities for pockets. The minimum recommended slope for self-venting is 1 inch per

In most process applications, the operator should assume that some level of gas or vapor

designed to allow gas to rise back into the flow stream. The process piping
horizontally a very short distance from the downstream tap and then sloped at a nominal 1
inch-per­horizontally below the upstream tap so that piping from the upstream tap to the manifold

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

CAUTION

When a flowing condition is stopped, particulates may fall into the low-pressure port.

It is advisable to flush the low-pressure port with an

inert fluid before starting the

be used

pressure

configurations that use the standard upstream

due
to the risk of trapping gas. For such applications, consider the use of a vertically
oriented meter with two wall taps (Fig 2.0)

Fig 8: Installation suggestion for upward flowing condition - Cone Meter with Vertical Orientation

2.15.7

Horizontal Meter Installation for Wet Gas

centerline

and the top of the pipe (3 o'clock to 12 o'clock or 9 o'clock to 12 o'clock). If the fluid is a "wet

a

If
the connecting tubing extending from the cone meter to the transmitter is not installed in a
vertical position, it should slope upward (at least 1 inch per foot) to ensure proper drainage.

Fig 9: 12 o’ clock position (preferred)

Fig 10: 3 o’ clock position

meter, unless a wall tap design is being used. A wall tap design should always
on applications where trash may have a propensity to fall into the central low­port (Fig 1.0). Downward flow piping
and downstream pressure ports are also not recommended for liquid applications

Fig 1.0

Fig 2.0

The pressure taps on the Tek-DPro DP Cone Meter should be between the horizontal

gas" (i.e., a gas containing small quantities of liquids). The pressure taps should be situated in
vertical position (12 o’clock) to allow all liquids to drain away from the transmitter (Figure 9).

Short lengths preferred
to assist in reduction
of Gauge Line Error

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

2.16 Cone Meter Installation - Hot Gases / Steam

The most difficult application for a differential pressure measurement is steam or hot gasses.

This

are

transmitter and may not be single phase due to

temperature change at the tubing due to various factors (Insulation failure, Joules Thompson

temperature

orientated

review

of the intended install.

2.16.1

Orientation

the

be

the best option taking into consideration the previous suggestions in earlier paragraphs.

2.16.2

Sensing /Impulse Tubing Orientation

meter,

installations,

the flow direction is also a factor. When a vertical meter run is to be used, operators/ system

liquid

from being trapped and thus cause incorrect measurement readings.

2.16.3

Condensate Chambers

prevent

heated steam from entering a differential pressure transmitter and causing overheating

diameter tee is only required to collect the liquid.

chamber
reservoir will be needed to prevent heat issues. Modern DP / smart transmitters have smaller
diaphragm movements and do not need large condensate chamber volumes.

2.16.4

Horizontal Service Applications – Steam / Hot Gases

The meter shall be installed so that the pressure taps shall be situated above the horizontal
centerline (9 o'clock to 3 o'clock only) of the meter. Condensing hot vapors from steam, cause

prevent
hot process fluid from damaging the transmitter in this operating condition. The
impulse/sensing tubing should slope upwards from the cone meter to the condensate pots. As

in

as

shown in Figure 12. In either case, condensate pots should be situated at the same location /

enable differential pressure readings that are accurate. A line from the bottom of the

tee to the transmitter mounted below the tee should be filled to the point where any excess

the
fluid must be protected from freezing as mentioned in an earlier section. The fluid fill
methodology requires a careful application with heat tracing and insulation to keep it in the

installation requires careful consideration regarding the transmitter tubing. Steam /Hot Gases
usually at a temperature which can damage a DP

effects, Phase envelope etc.) Liquid or gaseous phases can ensue depending on both
and pressure /environmental conditions. Differential pressure impulse tubing must be
in such a manner that it can operate with a gas or liquid present which requires some initial

All Tek-DPro Cone Meters can be installed in a horizontal or vertical position. Horizontal is
standard orientation, however where space is very limited, a vertical position may prove to

The installation /position of the DP impulse tubing is determined by the orientation of the
also the type and quality of the Steam/Hot Gas to be measured. For vertical meter

designers should give special consideration to the impulse tubing configuration to prevent

Condensate chambers are installed to provide a liquid reservoir / buffer that helps to
super­of the electronics. In most cases, a large­However, if the DP is being read by using a chart recorder, a larger volume condensate

Find Quality Products Online at: [e-mail]

liquid fluids to form in impulse lines. The use of a condensate chamber is mandatory to

mentioned, a condensate pot can be a tubing tee (Modern DP / smart transmitters) as shown
Figure 11 or large size condensate chambers (for higher volume devices like chart recorders)

level to

fluid can drain back into the meter to help prevent build up.
In many cases, water (condensed steam) is used for this fluid fill. However, in cold weather,

www.GlobalTestSupply.com

liquid phase and to keep both the high-pressure and low-pressure legs of the tubing at the same

temperature (maintaining the liquid fill at the same density).

A liquid leg fill fluid other than base water should be used if practical. Methanol is a possible

s
immiscible with water and remains liquid throughout a broader range of temperatures than
some other fill components (i.e., -31 to 645oF)

Fig 11: Horizontal Application DP Transmitter

Fig 12: Horizontal Application

(Chart Recorder Typical Application)

2.17

Specifications

Accuracy

±0.5% with Calibration

Repeatability

±0.1 % or better

Flow Ranges

10:1 and greater

0.45 through 0.85
Special betas available

as per ISO S167-5. Typically, 0-3D upstream and 0-2D
downstream is required

Inconel

Other materials available on request

Line Sizes

2” to 48”

Flanged

Others on request

Performance Verification Testing

ISO 5167-5

substitute, but di-butyl phthalate is recommended by various users as a fill fluid because it i

Standard Beta Ratios

Instillation Piping Requirements

Material

Large Condensate Chambers

(Steam)

Duplex
304 or 316 Stainless Steel
Hastelloy C-276
Carbon Steels

End Connections

Threaded
Hub or weld-end standard

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

2.18

Transmitters or Flow Computers

•

•

Tek-Bar 3110A Explosion Proof
Differential Pressure Transmitter

Tek-Bar 3800E Multivariable Pressure
Transmitter

Fig 13: Tek-Bar 3110A Explosion Proof

Differential Pressure Transmitter

Fig 14: Tek-Bar 3800E Multivariable Pressure

Transmitter

•

•

Tek-Bar 3800XH Multivariable Transmitter

TEK-FC 8000A Flow Computers

Fig 16: Tek-FC 8000A Flow Computer

Fig 15: Tek-Bar 3800XH Multivariable

Transmitter

2.19

Cone Meter Designs

1.

Field Replaceable Top Entry

•

Precision Welded (Fixed Design)

Fig 18: Field Replaceable Top Entry

Fig 17: Precision Welded

•

Field Replaceable Body

Fig 19: Field Replaceable Body

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

2.20

Process Connections

•

•

Flange

Hub

Fig 20: Flange

Fig 21: Hub

•

•

Union

Wafer

Fig 22: Union

Fig 23: Wafer

•

Threaded

Fig 24: Threaded

2.21

Dimensional Drawings

•

Beveled End

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Fig 25: Beveled End

•

Raised-Face Slip on Flange

Fig 26: Raised-Face Slip on Flange

Beveled Ends

Size i-(mm)

2” (50) 9.5” (241) 4.25” (108) 2.13” (53)

3” (80) 12.5”(317) 4.25”(108) 2.13” (53)

4” (100) 15.5” (394) 3.38” (86) 2.13” (53)

6” (150) 19.25”(489) 4.13”(105) 2.13” (53)

8” (200) 23.75”(603) 5.75”(145) 2.13” (53)

10”(250) 29.75”(755) 6.25”(159) 2.13” (53)

12”(300) 35.75”(908) 6.5”(165) 2.13” (53)

Dim

L in (mm) Dim A in(mm) Dim B in (mm)

152.5

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

•

Raised-Face Weld Neck

Fig 27: Raised-Face Weld Neck

*Note: Dimensions are subject to vary at time of manufacturing based on final Beta selected.

Dimensional drawing with a final engineering sizing sheet will be provided within 1-2 weeks of

order
acceptance.

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

2.22

Model Charts

Example Tek-DP 1620A 0050 D 01 A 01 C0 D 00 03 A XX A 01 A MTR

Tek-DP 1620A-0050-D-01-A-01-C0-D­00-03-A-XX-A-01-A

Series

A

Carbon Steel (Standard)

Tek-DP 1620A Cone Flow Meter

0015

0020

0025

0040

0050

0065

0080

0100

0150

0200

Size

0250

0300

0350

0400

0450

0500

0600

0700

0800

0900

1200

1/2" (only available for wafer)

3/4" (only available for wafer)

1" (only available for wafer)

1.5"

2"

2 ½"

3"

4"

6"

8"

10"

12"

14"

16"

18"

20"

24"

28"

32"

36"

48"

Meter Body

Pipe Schedule

B

C

D

E

F

G

H

I

01

02

03

04

05

06

07

08

09

10

11

12

Low Temp CS

304L SS

316L SS (St

Duplex 2205

Duplex 2507

Chromemoly CrMo P11

Chromemoly CrMo P22

Inconel Cladding

Special

STD (Standard Pipe Schedule)

10S

10

20

30

40S

40

80S

80

120

160

Extra Strong

andard)

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Process

Raised Face Slip On

Fixed Cone (Vertical UP Flow)

A

Carbon Steel

Special

00

Cone Taps

01

¼"

Connection

Pressure Rating

Cone Type

13

XX

B

C

D

E

F

G

H

I

W

U

X

XX Strong

Special

A

Raised Face Weld Neck

RTJ Slip On

01

02

03

04

05

06

07

08

09

XX

C0

C1

C2

W3

W

RTJ Weld Neck

ubs

H

API

Beveled End

Socket

NPTF (Up to 3")

Wafer Style (Up to 4")

Union

Special

150#

300#

600#

900#

1500#

2500#

3000# (NPT)

10K(API/Hubs)

15K (API/Hubs)

Special

Fixed Cone

Field Replaceable Body or Beta

Field Replaceable Top Entry Cone

Field Replaceable Cone

B

C

D

Cone Material
of Construction

Find Quality Products Online at: [e-mail]

Tap Location

Pressure Taps
Siz

e

www.GlobalTestSupply.com

E

F

G

H

I

01

X

02

03

04

05

XX

Low Temp CS

304L SS

316L SS (Standard)

D

uplex 2205

Duplex 2507

Chromemoly CrMo P11

Chromemoly CrMo P22

Inconel Cladding

Pipe Taps

Special

⅜"

½"

¾"

1"

Special

Pressure Tap

Special

XX

Special

A

XX

A

Special

- 2PC

Style

A

B

C

D

F

H

3000psi NPT

6000psi NPT

3000psi Socket

6000psi Socket

Flanged - Direct Mount

Hubs

Valves

Beta

Additional
Meter Taps
(D/S)

Flow
Tra

nsmitters /

Computers

Calibration

01

02

03

04

05

06

07

0.45

0.50

0.55

0.60

0.65

0.70

0.75

None

erature Tap (3D)

Temp

B

C

01

02

03

04

05

06

B

C

D

Validation/Diagnostic Tap (6D)

Special

None (Customer Supplied)

Tek-Bar 3110 (Liquids) - Smart DP
Tek-Bar 3800 (MVT Steam and
Compressed Gases)
Tek-FC 8000 (Natural Gas - Flow
Computer)
TekValsys DPRO (Insitu Flow Validation)

TekValsys DPRO WFGM (Wet Gas)

Special

Dry (ISO 5167)

ater

W

Air

Multiphase

MTR

Material Test Report EN3.1

MC

Material Cert EN2.1

PMI

Positive Material Identification (NDE)

COC

Certificate of Conformity

Options

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

HYD

Hydro Test

XRT

X-Ray

DPT

Dye Penetrant

MPT

Magnetic Particle Testing

O2C

O2 Cleaned

TAG

SS TAG PLATE

UM

Upstream Meter Run - 1PC

R

Downstream Meter Run - 1PC

Meter Run with Flow Conditioner Plates

DMR

3 Installations

must

CAUTION

•

When removing the instrument from hazardous processes, avoid direct

electrical code.

•

3.1

General Instructions

3.1.1 Before installing a Tek-DP 1620A Cone Meter, review the following installation tips:

•

Make sure the piping, tubing, or manifold installed between the Tek-DP 1620A Cone Meters

WARNING

•

•

Never use a rod to clean out process lines in high-pressure applications or where high

meter
run should be isolated and completely depressurized before inserting any cleaning / test
rod into an impulse tube line. Check for ice/hydrate build ups in tapping points as it can

false impression and become a projectile during a warmup

from freezing temperatures, do not look directly into the taps in this condition.

3.2

Installation for Gases

3.2.1 Horizontal Installation Gases

•

The pressure taps on the primary device should be between the center of the horizontal line

The recommended slope for self-draining is a minimum of 30°.

•

•

•

CDE

Certified Drawing E

MRB

Manufacturing Record Book

DFT

Dry Film Thickness - Custom Paint Spec

CPC

Custom Product Code

lectronic (As Built)

This section covers instructions on installation and commissioning. Installation of the device
be carried out by qualified trained, specialists authorized to perform such works.

contact with the fluid and the meter.
All installations must comply with local installation requirements and local

and the transmitter complies with national and local standards, regulations, and codes of
practice to ensure safe containment of fluid.
A hydrostatic test may be required for piping systems to prove the integrity of the pressure­containing components.
In installations that are prone to plugging, a rod or other device may be used to remove
materials blocking the impulse tubing note caution below:

temperatures (i.e., steam) or any dangerous /corrosive fluids being measured. The

block the pressure and give a

and the pipe (3 o’clock to 12 o’clock or 9 o’clock to 12 o’clock) shown in figure 6.
The taps should be vertical to allow the liquids to drain away from the secondary device if
the fluid is a “wet gas,” i.e., a gas containing small quantities of liquids.
For gases, the connecting lines from the primary device to the secondary device should be
slope upwards.

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Fig 28: Horizontal Installation for Gases

3.2.2

Vertical Installation Gases

•

Standard taps can be used in clean, dry, non-condensing gases, where no liquid or dirt can

fill the cone.

down to the transmitter.

•

Fig 29: Vertical Installation for Gases

The position of the transmitter is not critical.

•

The transmission lines should be straight to the transmitter or horizontal and then up or

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

3.3

3.3.1

Installation for Liquids

Horizontal Installations Liquids

•

The pressure taps should be between the center of the horizontal line and 60° below the

centerline (3 o’clock to 5 o’clock or 7 o’clock to 9 o’clock) shown in figure 6.

and

The taps should be more than 60° to the horizontal plane in any case.

•

•

Fig 30: Horizontal Installation for Liquids

3.3.2

Vertical Installations Liquids

•

In most process applications, the presumption should be made that there may be gas or

transmitter and the transmitter should be below both taps.

•

•

*Note: Wall taps must be used for dirty liquids. Standard taps should only be used on clean liquids.

Taps at the bottom-dead-center may accumulate solids if they are present in the liquid
taps above the centerline will accumulate air or non-condensing gases.

vapor associated with a liquid, even though the liquid is water.
The piping must then allow gas to rise back into the flowing medium.
The DP piping should be carried out horizontally for a short distance and then down to the

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

Fig 31: Vertical Installations for Liquids

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

3.4

3.4.1

Installations for Steam

Horizontal Installation for Steam

•

•

Steam applications require careful consideration during installation.

the

lines

There is a concern that before the lines fill with condensed liquid and cool, the secondary

up. In this case, it is wise to

se line to allow the liquid (water for steam service) to be

primary

considerable.

• • • • •

Fig 32: Horizontal Installation for Steam

3.4.2

Vertical Installation for Steam

•

Wall Taps are mostly recommended for condensing vapors, preventing condensation from

The impulse lines are shut down horizontally to a “T” at a minimum distance of 18” for
saturated and superheated steam to reduce the temperature to below the saturation

the DP cell.

•

•

Steam at a very high temperature can damage the transmitter. Additionally, it can be in the
liquid or gaseous phase, depending on temperature and pressure. Therefore, the DP
pipework must be positioned in such a way that it can operate with a gas or liquid present.
The pressure taps should be on the center of the horizontal line (3 o’clock or 9 o’clock ) of
primary device. In condensing hot vapor service, such as steam, the fluid in the impulse
is liquid condensed from the vapor. In this case, the pressure taps should be horizontal with
the impulse lines and positioned to the DP transmitter, as shown in figure 31.

system will become exposed to the vapor temperature at start­have a plugged tee fit in the impul
filled with the impulse line and secondary unit before starting up (see Figure 32).
Cryogenic (very low temperature) systems may require special designs, which are not
considered here.
The liquids in the lines will isolate the secondary device from the temperatures of the
flowing fluid.
Over a short distance of 100 mm (4”) to 200 mm (8”), the temperature difference can be

Find Quality Products Online at: [e-mail]

the buildup in the cone or evaporating and changing the DP.

temperature.
The “T” enables a plug to be installed at the top for the liquid filling to avoid overheating of

www.GlobalTestSupply.com

•

The manifold block will be placed directly below at a distance to maintain the DP transmitter
at a safe operating temperature.

Fig 33: Vertical Installation for Steam

3.5

Installation for Upstream and Downstream

•

In most of the flow elements, the proper operation and performance depend on unrestricted

can

be installed with O to 5D and O to 3D downstream.

•

•

*Note UL= Upstream

0 = NR

Side View Front View

upstream and downstream piping length requirements.
The fully developed symmetrical flow profile is achieved with relatively short upstream and
downstream lengths.
Therefore, it needs minimal upstream and downstream straight pipe runs. The Cone meter

DL= Downstream

0.4 0.5 0.6 0.7 0.8

UL 0 0 0 1D 1D

DL 0 0 0 1D 1D

UL 0 0 0 1D 1D

DL 0 0 0 1D 1D

UL 0 0 0 1D 1D

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

4 Maintenance

•

There should be no need for periodic maintenance or re-calibration if the meter is installed

instructions.

•

•

DL 0 0 0 1D 1D

UL 1D 1D 1D 2D 2D

DL 1D 1D 1D 2D 2D

UL 1D 1D 1D 2D 2D

DL 1D 1D 1D 2D 2D

UL 0 0 0 1D 1D

DL 0 0 0 1D 1D

UL 3D 3D 3D 4D 4D

DL 0 0 0 1D 1D

UL 3D 3D 3D 4D 4D

DL 3D 3D 3D 4D 4D

correctly.
In extreme process conditions, periodically inspect the Tek-DP 1620A DP Cone Meter for any
significant physical damage.
Calibrate and maintain secondary and tertiary instrumentation according to the manufacturer’s

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

5

Troubleshooting

This section provides troubleshooting techniques for most common operating problems shown

in

table 1.

Table 1: Troubleshooting Techniques

Symptoms

Area

Possible Problem or Solution

• No Power to transmitter.

• Check continuity on wiring or loose connection.

Negative Signal (<0mA)

Transmitter

• Transmitter wires are reversed.

• Cone Meter is installed backwards, with gauge

sensing

4mA.

• Gauge lines are reversed. Transmitter shows more

• Check “H” and “L” marks on DP Cone Meter.

• Meter has been damaged.

no flow.

Manifold / gauge lines closed or blocked.

verify pressure in the gauge lines.

coefficient.

• Foreign material trapped in gauge lines. Dirt and

valve for several minutes under high DP. Close the

No Signal (0mA) Transmitter

Tek-DP 1620A
Low signal
(<4mA)

Gauge Line

Tek-DP 1620A

Zero Signal (4mA)

Manifold

• Transmitter not wired correctly.

lines attached as marked.

• In this case, th
a lower pressure than the low pressure tap.

• This negative DP w

pressure on lower side than higher side.

• Remove meter and visually inspect.

• No flow in pipeline.

• Check other system locations to verify flow

through the meter.

• The meter cou

•

• Ensure valves and lines are open.

• If fluid is safe

e high-pressure tap would be

ould force the signal below

ld be under pressure but still have

, open vent valves on transmitter to

• Process conditions do not match actual
conditions.

• Contact your sales representative to recalculate
using the correct process conditions.

Tek-DP 1620A

Wrong Signal High or Low

Gauge Lines

• Wrong meter.

• Verify serial numbers on meters to ensure correct

specifications.

• Sometimes two meters are interchanged.
Remember each DP Cone Meter has a unique flow

sediment can settle into the gauge lines. If the
fluid is safe, vent the gauge lines and inspect for
spurts of solids, gasses, or liquids (whichever
should not be there).

• If the fluid is not safe, open the center manifold

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

valve and compare the signal level to before

top or sides of the pipe (12, 3, or 9 o’clock).

Flow Computer

• Flow calculations have an error.

signal directly.

Partially full pipe occurring (liquids only).

readings. See above for details.

Slow response time

Transmitter

Dampening.

Foreign object lodged in meter.

• Remove the meter and visually inspect.

Gauge Lines

• There may be leakage in line.

• Meter body, near the pressure taps.

release will indicate partially full pipe.

Unsteady Signal Tek-DP 1620A

Sudden change in readings

Tek-DP 1620A

readings.

• In a horizontal,
with the taps on the sides of the pipe (3 or 9
o’clock) For a ho

• Use loop calibrator and apply 4, 12, and 20mA to
computer / system.

• Each of these points should be correlate with the
DP Cone Meter sizing information.

• Current output signal is read incorrectly.

• Apply a known current to the loop and read the

raw signal in the computer.

• Most computers

•

• Periods with a partially full pipe will cause wrong

•

• This will increase the restriction of the meter and

raise the DP.

liquid application, install the meter

rizontal, gas application, install at

allow the user to see the mA

Signal very High Tek-DP 1620A

• If any arrow is not visible and the meter is large
than 2”, the flow direction can be determined by
the location of the pressure taps.

• The pressure taps will be closer to the upstream
side.

• On meters less than 2”, the gauge lines will need
to be removed. Look at the base of both pressure
taps. One tap will be smooth at the base, the
other will be mostly weld material.

• The smooth tap is on the upstream side.

• Flow is going in the opposite direction from what

was expected. The assumption of flow direction is
sometimes wrong.

• Verify with other system readings.

• With a meter measuring backward flow, the DP

signal will be approximately 30% high.

• Partially full pipe (liquids only). A partially full
pipe will cause the meter to read very high. This
can happen even in pressurized systems.

o On horizontal pi

a pressure tap on the top of the pipe. Air

pes: If the fluid is safe, open

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com

o On vertical pipes: Up flow will guarantee a

full pipe. Down flow is difficult to diagnose if

Remove the meter and visually inspect.

• Leak on low pressure gauge line.

transmitter.

• Leak on low pressure vent valve. Perform a leak

communicator to verify span point.

4mA set to minimum flow.

offset.

• Manifold is cross-vented. The center valve must

is not closed completely.

Leak on high pressure gauge line.

transmitter.

the pipe is full.

• Foreign obj
the restriction of the meter and raise the DP.

ect lodged in meter. This will increase

Gauge Lines

Transmitter

Flow Computer

• Perform a leak check from the meter to the

check on valve.

• Zero point h
errors more pronounced at the low end of the
transmitter range.

• Verify by closing the manifold side valves and
opening the center valve. The reading should go
to zero (4mA).

• Recalibrate if necessary. DP span is set very low.

• Use pressure ca

•

• Our calculations assume that 4mA will be equal to

zero flow. Sometimes 4mA is set to equal the
minimum flow on the sizing page.

• This error will be zero at maximum flow and
increase as the flow decreases.

• The amount of e

as shifted positively. This will cause

librator or handheld

rror will depend on the zero

Manifold

Signal Very Low

Gauge lines

be closed.

• To test, clo
transmitter signal.

• If the signal

•

• Perform a leak check from the meter to the

se the two side valves and watch the

goes to zero (4 ma), the center valve

Find Quality Products Online at: [e-mail]

www.GlobalTestSupply.com