How it Works
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326L
Operating Manual
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Specifications
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Rosemount 326L Operating Manual

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Rosemount™ 326L Level Transmitter
Quick Start Guide
00825-0100-4326, Rev 01
January 2019
2
Quick Start Guide Contents
00825-0100-4326 January 2019

Contents

1.1 Safety instructions............................................................................................................................5
1.2 Applications..................................................................................................................................... 5
1.3 Measuring principle..........................................................................................................................6
1.4 Outputs............................................................................................................................................7
1.5 IO-Link..............................................................................................................................................8
1.6 Functions..........................................................................................................................................8
2.1 Installation considerations..............................................................................................................13
2.2 Installing the level transmitter........................................................................................................17
2.3 Wire the transmitter.......................................................................................................................22
3.1 Display elements............................................................................................................................ 25
3.2 Menu structure...............................................................................................................................26
3.3 Parameter settings......................................................................................................................... 29
3.4 Setup the level transmitter............................................................................................................. 30
3.5 Using the transmitter..................................................................................................................... 38
3.6 Setting parameters with IO-Link..................................................................................................... 40
4.1 Error indicators...............................................................................................................................43
4.2 Output response in different operating states................................................................................ 43
4.3 Maintenance.................................................................................................................................. 44
6.1 European directive information...................................................................................................... 49
6.2 Ordinary location information........................................................................................................ 49
6.3 3-A® certification............................................................................................................................49
6.4 Other industry certifications...........................................................................................................49
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4 Quick Start Guide
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Introduction

1 Introduction

The level transmitter continuously detects level of a media and reports the level of the media in multiple selectable units of measurements and values.

1.1 Safety instructions

Follow these safety guidelines when installing and using the level transmitter.
CAUTION
• Read this document before installing the level transmitter and keep it for the life of the
level transmitter.
• The level transmitter must be suitable for the corresponding applications and
environmental conditions without any restrictions.
• Use the level transmitter only for its intended purpose.
• Use the level transmitter only with permissible media.
• If you do not adhere to the operating instructions and technical data, personal injury
and/or damage to property might occur.
• The manufacturer assumes no liability or warranty for any consequences caused by
tampering with the product or incorrect use by the operator.
• Installation, electrical connection, set-up, operation and maintenance of the product
must be performed by qualified personnel authorized by the machine operator.
• Protect units and cables against damage.

1.2 Applications

The level transmitter is intended to be used in food and beverage applications or applications with significant hygienic requirements.
The level transmitter complies with the standard EN 61000-6-4 and is a class A product. The level transmitter may cause radio interference in domestic areas. If interference occurs, the user must take appropriate actions.
Note
The level transmitter emits less microwave energy than mobile phones. The operation of the level transmitter is harmless to human health if used as intended.
1.2.1
Quick Start Guide 5

Application area restrictions

Measurements made by the level transmitter can be impacted by the environment and the type of media it is measuring.
The following media characteristics can cause incorrect measurements:
Introduction Quick Start Guide
January 2019 00825-0100-4326
• Highly absorbing surfaces (foam)
• Intensely bubbling surfaces
• Media which are very inhomogeneous, separate from each other thus forming
separation layers (oil layer on water)
To prevent this, follow these guidelines:
• Check the function by performing an application test.
• Install the level transmitter in a steady environment.
In case of signal loss, the level transmitter displays SEnS and switches the outputs to a defined state. See Output response in different operating states for more information.
The level transmitter is not suitable for:
• Bulk materials like plastic granulates and media with a very low dielectric constant like
oils.
• Applications where the probe is subjected to permanent and high mechanical stress.
For example, fast moving viscous medium or fast flowing medium.
Use the level transmitter preferably with metal tanks. When used with plastic tanks, deterioration caused by electromagnetic interference might occur (noise immunity to EN61000-6-2).

1.3 Measuring principle

The level transmitter uses guided wave radar to measure media level. It emits electromagnetic pulses every nanosecond to measure the level.
Figure 1-1: Transmitting Pulses
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Figure 1-2: Receiving Pulses
The transmitter head transmits pulses that are guided along the probe towards the media (Figure 1-2). When the pulses hit the media they are reflected and guided back to the transmitter (Figure 1-2). The time between transmitting and receiving the pulse determines the traveled distance (D) and the current level. The reference for distance measurement is the lower edge of the process connection.
Introduction
1.3.1

Probes for different tank heights

The height of the probe must be adjusted to accommodate the height of the tank. Probes at different heights are available to order. The minimum probe length is 1.18 inches (150 mm). The maximum probe length 78.74 in (2000 mm).

1.4 Outputs

The level transmitter generates output signals based on the output parameter settings. Two outputs are available and they can be set separately.
OUT1
OUT1 provides a switching signal for level limit or IO-Link communication. See IO-Link for more information.
OUT2
OUT2 can perform one of these functions:
• An analog signal proportional to the level 4 - 20 mA or 20 - 4 mA
• Switching signal for level limit
1.4.1

Fault states

Defined states for each output prepare the output for fault conditions. If the level transmitter detects a fault or if the signal quality is below a minimum value, the transmitter outputs change to the defined fault state.
Use FOU1 and FOU2 to configure fault states for the respective outputs. Fault states for the analog output follow Namur recommendation (NE43). For more information, see Set
response of the outputs in case of fault.
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Setting a delay time prevents the level transmitter from erroneously falling into a fault state. For more information, see Set delay time in case of a fault. During the delay time, the level transmitter retains the last measured value. If the measured signal is received again in sufficient strength within the delay time, the unit continues to work in normal operation. If it is not received again in sufficient strength within the delay time, the outputs change to the defined state.
Note
In case of heavy foam build-up or turbulence, create a steady environment for the level transmitter. For more information, see Minimum distances and connection piece
diameter.
Quick Start Guide

1.5 IO-Link

The level transmitter has an IO-Link communication interface which requires an IO-Link­capable module (IO-Link master) for operation.
The IO-Link interface enables direct access to the process and diagnostic data and provides the possibility to set the parameters of the unit during operation.
Point-to-point connection is possible with a USB adapter cable.
Detailed information about process data structure (IODDs) necessary for the configuration of the level transmitter, diagnostic information, parameter addresses, and the necessary information about the required IO-Link hardware and software can be found at
Emerson.com/Rosemount.

1.6 Functions

The level transmitter performs the functions detailed in this section.
1.6.1

Display functions

The level transmitter displays the current level, either in millimeters, inches, or percentage of the scaled measuring range. The default factory setting is inches.
For more information on changing the displayed unit of measurement, see Configure the
display.
In the operating mode, you can switch between length display (mm, inch) and percentage. For more information, see Change display between length and percentage.
The LEDs indicate the set unit of measurement and the switching status of the outputs. For more information, see Display elements.
1.6.2
8 Quick Start Guide

Analog signal

The level transmitter can provide an analog signal proportional to level.
The parameter ou2 defines the output function for the analog output:
• 4-20 mA (ou2 = I)
• 20-4 mA (ou2 = InEG)
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For more information, see Set output function for OUT2.
The analog start point ASP2 defines the measured value at which the analog start value is provided. The analog start value is 4 mA with ou2 = I or 20 mA with ou2 = InEG. For more information, see Scale analog signal.
The analog end point AEP2 defines the measured value at which the analog end value is provided. The analog end value is 20 mA with ou2 = I or 4 mA with ou2 = InEG. For more information, see Scale analog signal.
The minimum distance between ASP2 and AEP2 is 20 percent of the active zone.
Figure 1-3: Analog signal
The default factory curve of the analog signal: A scaled measuring range curve of the analog
signal:
Introduction
1.6.3
L: Level A: Active zone = L - (I1 + I2) I1: Inactive zone 1 I2: Inactive zone 2
For more information about the analog output, see Output response in different operating
states.
Take note of the tolerances and accuracy limits during the evaluation of the analog signal. For more information, see the Product Data Sheet.
1: ou2 = I (factory setting) 2: ou2 = InEG ASP2: Analog start point AEP2: Analog end point

Switching functions

When using a switching output (OUT1 or OUT2), the level transmitter indicates when the level reaches a set limit or that the level is below the limit.
Select one of the following switching functions for the outputs:
• Hysteresis function/normally open: oux = Hno
• Hysteresis function/normally closed: oux = Hnc
Note
When configuring a switching function, set the set point (SPx) first, then set the reset point (rPx) with the requested difference.
• Window function/normally open: oux = Fno
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• Window function/normally closed: oux = Fnc
Note
The difference between FHx and FLx sets the width of the window. FHx is the upper value and FLx is the lower value.
Figure 1-4: Switching function
Hysteresis function Window function
Quick Start Guide
1.6.4
L: Level
HY: Hysteresis
FE: Window
• The adjustable limits (SP and rP) always refer to the lower edge of the probe.
• The maximum switch-on and switch-off delay for the switching output is 60 seconds.
For more information, see Set switch-on delay for switching outputs and Set switch off
delay for switching outputs.

Damping function

If the medium conditions are unsteady, dampen the transmitter response. The level transmitter uses a filter to smooth the values into a steady curve when the display and output response is dampened.
You can configure the damping using dAP. For more information, see Set damping for
measured signal.
In the event of a sudden jump in level, dAP indicates the time in seconds for the output to reach 63 percent of the final value. After five times dAP, the output should reach 100 percent of the final value.
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1.6.5 Simulation functions

To assist in maintenance, reducing interference, or setting up the level transmitter, simulate error scenarios and levels.
The duration of a simulation can be between one minute and one hour. The simulation is started manually and runs until the set duration elapses. During the simulation, the outputs respond according to the simulated process values. For more information, see
Simulation.
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2 Installation

This section includes instructions for installing and wiring the level transmitter.
These procedures are required to setup the level transmitter:
1. Installing the level transmitter
2. Wire the transmitter
3. Adjust the probe length
To modify the factory default settings, perform these procedures.
• Set parameters
• Perform a tank adjustment
• Change basic settings
To view the factory default settings, see Factory settings. Test that the level transmitter is working correctly before using.

2.1 Installation considerations

Follow these installation guidelines to ensure more effective operation of the level transmitter.
• For more effective level measurement, install the level transmitter vertically on the top
of the tank or pipe.
• To reduce signal interference, perform a tank adjustment (see Tank adjustment).
• For more effective level measurement, install the level transmitter in closed, metal
tanks or bypass pipes.
— For installation instructions for open tanks, see Installing in an open tank.
— For installation instructions for plastic containers, see Installing in a plastic tank.
2.1.1

Minimum distances and connection piece diameter

For more effective operation, follow these guidelines for the connection piece diameter and the distances between the level transmitter and the tank.
Select a connection piece height that is smaller than the connection piece diameter.
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Installation distances with adjustment A1: 0.39 in (10 mm) A2: 0.79 in (20 mm) A3: 0.79 in (20 mm) to tank structures (B) 1.97
in (50 mm) to other transmitters type LR D: ø 1.18 in (30 mm) if installed in a connection
piece

2.1.2 Installation in pipes

If installing the level transmitter in a pipe, the conditions must meet these requirements.
• Hygienic requirements
• Install only in metal pipes
• The internal diameter of the pipe (d) must meet these requirements:
With adjustment
d ø 1.18 in (30 mm) ø 3.94 in (100 mm) with [MEdI] =
Installation distances without adjustment A1: 0.39 in (10 mm) A2: 1.97 in (50 mm) A3: 1.97 in (50 mm) to tank structures (B) 1.97
in (50 mm) to other transmitters type LR D: No connection piece allowed (see above
image)
Without adjustment
[HIGH] ø 7.87 in (250 mm) with [MEdI] =
[MId] For more information, see Set to
another medium.
Note
Using a centering piece can prevent damage caused by turbulent media by stabilizing the probe.
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Installation

2.1.3 Applications with viscous or fast-flowing media

The installation of the level transmitter must meet the following requirements if installed in conditions with viscous or fast-flowing media and/or agitators.
• The probe cannot contact the tank walls or structures.
• Expect an increase in the minimum lateral distances according to probe length and the
lateral deflection.
• If possible, use a sleeve or a similar device to fix the probe at the lower end so that it is
electrically conductive. See Figure 2-1
Figure 2-1: Installation with Viscous or Fast-Flowing Media
2.1.4
2.1.5
2.1.6
• Ensure the correct function is set. (Especially in use with an empty tank)

Fill openings

Do not install the level transmitter near or in contact with a fill opening.

Highly polluted medium

If the medium is highly polluted, there is a risk that a bridge forms between the probe and the tank wall or structures in the tank.
To avoid this, increase minimum distance between the probe and the tank walls depending on the pollution intensity.

Heavy foam build-up and turbulence

Heavy foam build-up or turbulence in the tank might cause incorrect measurements.
To avoid this, install the transmitter in a steady area that meets hygienic requirements.
Examples of how to create a steady environment include:
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• Install the level transmitter in a metal bypass or a metal still pipe.
• Separate the level transmitter location with metal sheets or perforated sheets.
Figure 2-2: Installing in foam build-up and turbulence
Quick Start Guide
2.1.7
d: Minimum diameter (See Installation in pipes)
Note
The upper access to the steady area (A, B) must be above the maximum level. The lower access (C, D) or the area with perforated sheet must be below the minimum level. This ensures that neither foam nor turbulence impact the transmitter zone. To avoid interference from solids in the medium, use perforated sheets or something similar.
Note
With increased foam build-up set the medium parameter [MEdI] to [MId]. For instructions, see Set to another medium.

Tank adjustment

Tank adjustment reduces interference and ensures a higher excess gain in difficult application conditions.
CAUTION
Perform a tank adjustment only after installing the level transmitter.
• When performing a tank adjustment, enter an adjustment distance first. Starting from
the process connection, use the adjustment distance to compensate for interfering reflections.
• Select an adjustment distance (a) so the level transmitter can detect the connection
piece (S) and structures in the tank (B).
• Observe safety distance (b ≥ 9.84 in (250 mm)) to the level or the probe end.
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a: Minimum adjustment distance is 0.39 in (10 mm); maximum is L - 9.84 in (250 mm)
b: Safety distance to the level or probe end: b ≥ 9.84 in (250 mm)
S: Connection piece
B: Structures in the tank
Installation
• For probe lengths L < 10.24 in (260 mm), tank adjustment is not possible. tREF is then
not available. In this case, adhere to all installation distances in Installation
considerations.
• If the installation meets all distance guidelines, a tank adjustment is not necessary.
• If possible, perform the tank adjustment on an empty tank to detect any possible
sources of interference. In this case, select the maximum adjustment distance (L - 9.84 in or L - 250 mm).
• Tank adjustment information is not saved with IO-Link. After a replacement, perform a
tank adjustment again. For more information on data storage, see Unit locking and
data storage.

2.2 Installing the level transmitter

Follow these instructions to install the level transmitter.
2.2.1

Adjust the probe length

If needed, modify the standard probe length to accommodate the height of the tank.
Note
• The level transmitter does not support probe lengths less than 5.91 in (150 mm).
• Tank adjustment is not possible with probe lengths of less than 10.24 in (260 mm). For
more information, see Tank adjustment.
Procedure
1. Screw the probe to the level transmitter.
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2. Mark the desired length (L) on the probe. The reference point is the lower edge of
the process connection.
3. Remove the probe from the unit. Do not lose the O-ring between the probe
attachment piece and the probe.
4. Shorten the probe at the mark.
5. Remove all burrs and sharp edges. For hygienic requirements: Restore the required
surface quality. If necessary, polish the probe.
Quick Start Guide
2.2.2
Note
In cases with strong vibrations or moving viscous medium, it may be necessary to secure the probe connection using screw retaining compound. In this case, ensure that the compound is harmless because it might migrate into the medium.
Postrequisites
Reinstall the probe by following the steps in Install the probe.

Install the probe

Install the probe onto the level transmitter to ensure accurate level readings.
For more information, see Measuring principle.
Note
The probe is not included with the level transmitter.
CAUTION
Do not damage the surfaces of the process connection and probe. Use tools suitable for use with plastic surfaces.
Procedure
1. Remove the protective cover and protective devices from the unit and the probe.
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2. Slip the supplied O-ring onto the probe connection of the unit and check its
position.
3. Screw the probe to the unit and tighten it.
Note
Recommended tightening torque: 4.79 ft/lbs (6.5 Nm).
Installation
2.2.3
4. Ensure that the O-ring has not moved from its original position. Replace the O-ring
if necessary.
Note
In cases with strong vibrations or moving viscous medium, it might be necessary to secure the probe connection using screw retaining compound. In this case, ensure that the compound is harmless because it might migrate into the medium.
5. If the probe length was modified, measure and record the probe length.
a) Precisely measure the length of the probe starting from the lower edge of
the process connection.
b) Record the length of the probe. It is needed for setting up the device
parameters.
For more information on setting the length of the probe in the device parameters, see Enter probe length.

Install the level transmitter

Install the level transmitter using these steps. Take note of the different process connections.
CAUTION
Consider the potential dangers related to extreme machine and medium temperatures.
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Prerequisites
Note
Before installing or removing the level transmitter, ensure that no pressure is applied to the system. Also ensure that there is no medium in the tank that might leak during installation.
The level transmitter can be installed using a mounting or welding adapter with a sealing ring. The adapters are supplied with an EPDM o-ring. Further sealing ring materials (FKM) are available. For ordering information, see the transmitter Product Data Sheet. For installation instructions, refer to the instructions included with the mounting adapter.
Note
Certain configurations do not allow alignment of the transmitter housing. With process connections that cannot be aligned, like welding adapters, take into account the final position of the transmitter housing (readability of the display, cable entry). Observe marks on adapters. If needed, screw in the unit and mark the requested alignment.
Procedure
1. Lightly grease the thread of the transmitter using a lubricating paste suitable and
approved for the application.
2. Insert the unit into the process connection.
3. Tighten it using a spanner to a torque of 25.8 ft/lbs (35 Nm).
Quick Start Guide
2.2.4

Installing in an open tank

Follow these guidelines when installing the level transmitter in an open tank.
• Use a metal fixture to install the level transmitter to the side of the open tank. It serves
as a launching plate (R) for the level transmitter. The minimum size for a square fixture is 5.91 by 5.91 in (150 by 150 mm). The minimum size for a circular fixture is 5.91 in (150 mm) diameter. For more information, see Operation with a single probe.
• If possible, mount the level transmitter in the middle of the fixture. Adhere to the
specified installation distances according to Installation considerations. If necessary, perform a tank adjustment.
D1: Minimum 5.91 in (150 mm)
R: Launching plate
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Installation

2.2.5 Installing in a plastic tank

Follow these guidelines when installing the level transmitter in a plastic tank or in a metal tank with a plastic lid.
D1: Minimum 5.91 in (150 mm)
R: Launching plate
• The plastic lid must have a drill hole with a minimum diameter of 5.91 in (150 mm).
2.2.6
• Use a metal flange plate or launching plate (R) that sufficiently covers the drill hole. For
more information, see Operation with a single probe.
• Ensure that the distance between the probe and the tank wall is at least 3.15 in (80
mm). Adhere to the installation instructions in Installation considerations. If necessary, perform a tank adjustment.
CAUTION
When installed in plastic tanks, there may be deterioration caused by electromagnetic interference from other devices. Follow these guidelines to avoid deterioration:
• Apply a metal foil to the outside of the tank.
• Apply a shielding screen between the level transmitter and other electronic units.
• Install in a metal pipe only if hygienic requirements are met. For more information, see
Installation considerations.

Installing with 3-A® standards

The level transmitter is authorized to display the 3-A symbol. Follow these guidelines to ensure 3-A compliance when installing the level transmitter.
• Ensure that the transmitter is installed according to 3-A standards.
• Use the level transmitter only with 3-A certified adapters marked with the 3-A symbol.
• The process connection must have a self-draining leakage port. 3-A certified adapters
all have self-draining leakage ports.
• Choose an installation position where the probe and process connection can be
cleaned with a spray ball.
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Note
According to 3-A standards, special regulations apply for cleaning and maintenance. For more information, see Cleaning and maintenance in 3-A® applications. Not suitable for systems which must meet the criteria of paragraph E1.2 / 63-03 of the 3-A standard 63-03.

2.3 Wire the transmitter

Wire the transmitter according the instructions and illustrations in this topic.
CAUTION
The level transmitter must be connected by a qualified electrician. Adhere to national and international regulations for the installation of electrical equipment.
Voltage supply according to EN 50178, SELV, PELV.
CAUTION
This devices requires additional surge protection for marine applications (if approval is available for this device).
Procedure
1. Disconnect power to the level transmitter.
2. Connect the unit according to these diagrams (colors to DIN EN 60947-5-2):
OUT1: switching output / IO-Link
OUT2: analog output / switching output
BK: Black
BN: Brown
BU: Blue
WH: White
Note
After applying operating voltage to the level transmitter for the first time, enter the probe length into the device parameters. After that, the level transmitter is ready for operation. For more information, see Enter probe length.
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Example circuits
2 x positive switching 2 x negative switching
1 x positive switching / 1 x analog 1 x negative switching / 1 x analog
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3 Operation

The procedures in this section provide instructions for setting parameters and settings on the level transmitter.

3.1 Display elements

The front of the level transmitter includes LED indicators, buttons, and an alphanumeric display.
1 to 8: Indicator LEDs
LEDs 1 - 3 Selected unit of measurement.
LEDs 4 - 6 Not used.
LED 7 Active only if the switching output ou2 = I or InEG is selected; then:
switching status OUT2 (on when output 2 is switched).
LED 8 Switching status OUT1 (on when output 1 is switched).
9: Enter button
Open the user menu, edit and confirm the parameter values.
10 to 11: Arrow keys up [▲] and down [▼]
• Selection of the parameters
• Setting of the parameter values (continuously by holding pressed; incrementally by pressing
once).
12: Alphanumeric display, four digits
• Display of the current level.
• Display of the parameters and parameter values.
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3.2 Menu structure

The menu provides options for configuring parameters and viewing settings.
Note
Menu items highlighted in gray are active only after setting assigned parameters.
• I: Main Menu (See Main menu options)
• II: Menu level EF (See Extended functions menu options (EF))
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3.2.1
Note
Menu items highlighted in gray are active only after setting assigned parameters.
• III: Level CFG (See Configuration menu options (CFG))
• IV: Level ENV (See Environment menu options (ENV))
• V: Level SIM (See Simulation menu options (SIM))

Main menu options

The main menu includes these options.
Option
tREF Carry out tank adjustment.
SP1/rP1 Set point 1 / reset point 1 at which OUT1 switches.
FH1/FL1 Upper / lower limit for the acceptable range within which OUT1 switches.
ASP2 Analog start point 2: measured value at which the analog start value is
AEP2 Analog end point 2: measured value at which the analog end value is
Description
Visible only if LEnG ≥ 10.24 (260 mm).
Visible only after selecting hysteresis function (ou1 = H..)
Visible only after selecting window function (ou1 = F..)
provided. The analog start value is set with parameter ou2. Visible only after selecting analog output (ou2 = I or InEG)
provided. The analog end value is set with parameter ou2. Visible only after selecting the analog output (ou2 = I or InEG)
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Option Description
SP2/rP2 Set point 2 / reset point 2 at which OUT2 switches.
Visible only after selecting the hysteresis function (ou2 = H..)
FH2/FL2 Upper / lower limit for the acceptable range within which OUT2 switches.
Visible only after selecting the window function (ou2 = F..)
EF Extended functions / opening of menu level 2

3.2.2 Extended functions menu options (EF)

The extended functions menu includes these options.
Option Description
rES Restore factory settings (all parameters including tank adjustment)
CFG Open the configuration menu (CFG)
ENV Open the environment menu (ENV)
SIM Open the simulation menu (SIM)

3.2.3 Configuration menu options (CFG)

The configuration menu includes these options.
Option
ou1 Output configuration for OUT1: switching signal for level limit value.
ou2 Output configuration for OUT2:
dS1 Switch-on delay for OUT1
dr1 Switch-off delay for OUT1
(1)
dS2
(1)
dr2
uni Selection of the unit of measurement on the transmitter display; mm or
P-n Output polarity of the switching outputs; positive or negative switching
FOU1 Response of OUT1 in case of a fault
FOU2 Response of OUT2 in case of a fault
Description
Hysteresis or window function, normally closed or normally open
• analog signal for current level, 4 - 20 mA or 20 - 4 mA
• Switching signal for level limit. Hysteresis or window function,
normally closed or normally open
Switch-on delay for OUT2
Switch-off delay for OUT2
inch
SELd Selection of display options
dAP Damping of the measured signal (mean filter)
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Option Description
dFo Delay time for the outputs to pass into the state defined with FOUx; only
effective in case of a fault
(1) Visible only after selecting hysteresis or window function (ou2 = H.. or F..).
Operation

3.2.4 Environment menu options (ENV)

The environment menu includes these options.
Option Description
LEnG Input of the probe length
MEdI Medium selection

3.2.5 Simulation menu options (SIM)

The simulation menu includes these options.
Option Description
S.LvL Simulation of a level or an error state
S.Tim Simulation duration 1 - 60 minutes
S.On Simulation start/stop

3.3 Parameter settings

The level transmitter remains in operating mode while setting new parameters. It continues to monitor using the existing parameters until new parameters are set.
3.3.1

Read set parameters

Perform these steps to view the parameters set on the level transmitter.
Procedure
1. Press Enter to open the menu.
2. Press the up or down button to scroll through the set parameters.
3. Press Enter again to view the parameter value. The transmitter displays the value for 30 seconds then returns to the process value display.
3.3.2
Quick Start Guide 29

Set parameters

Follow these steps to modify parameters values.
Procedure
1. Press Enter to open the menu.
2. Press the up or down buttons to navigate to a parameter.
Operation
January 2019 00825-0100-4326
3. Press Enter to select a parameter.
4. Press the up or down buttons for at least one second. After one second the parameter value changes. Press and hold the button to change the value continuously.
5. Press Enter. The level transmitter saves the new value.
6. Repeat steps 2 - 5 to modify other parameters. After 30 seconds of inactivity, the menu returns to the process view display.
Quick Start Guide

3.3.3 Change menu level

Perform these steps to move to the next menu level.
Procedure
1. Press Enter to get to the menu.
2. Press up or down until the menu displays EF.
3. Press Enter. The display shows the next menu.
3.3.4

Lock or unlock the menu

Lock the menu to prevent unintentional changes to the parameters. By default, the menu is unlocked. When the menu is locked, it briefly displays Loc when you attempt to change a parameter value.
Prerequisites
The level transmitter must be in normal operating mode.
Procedure
1. Press and hold the up and down buttons simultaneously for 10 seconds. The menu is locked and it displays Loc.
2. To unlock the menu, press and hold the up and down buttons for 10 seconds. The menu is unlocked and it displays uLoc.

3.4 Setup the level transmitter

Procedures in this section provide instructions for configuring the settings and parameters of the level transmitter.
3.4.1

Enter probe length

Enter the length of the probe into the parameters to ensure accurate level measurements.
Procedure
1. Apply operating voltage.
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The display shows the initial display.
2. Select LEnG from the menu. If the parameter does not contain a value, the display shows nonE.
3. Press and hold up or down for at least one second. The display shows the detected probe length.
4. If the detected probe length is incorrect, press up or down to change the probe length to the correct value.
5. Press Enter. The level transmitter proceeds to operating mode.
Notes
The level transmitter can automatically detect the length of the probe if:
• The tank is empty
• The level transmitter is mounted on a sufficiently large launching plate
For instructions on manually determining the length of the probe, see Record probe
length.
Operation
3.4.2
3.4.3

Perform a tank adjustment

Tank adjustment reduces the effect of interference and ensures a higher excess gain in difficult application conditions.
For more information on tank adjustments, see Tank adjustment.
Prerequisites
The tank adjustment menu option tREF appears only if the set probe length is greater than or equal to 10.24 in (260 mm).
Procedure
1. Select tREF from the menu. The display shows nonE or the value set by a previous tank adjustment.
2. Press and hold up or down for at least one second. The display shows the distance value. The default value is 0.39 in (10 mm).
3. If necessary, correct the value using the up and down buttons.
4. Press Enter. The display shows donE.
5. Press Enter again. The level transmitter reboots and returns to operating mode.

Configure the display

Modify how the level transmitter displays information.
Procedure
1. Change the unit of measurement.
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Operation
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a) Select uni from the menu.
b) Select mm for millimeters or inch for inches.
c) Press Enter.
2. Change the indicator.
a) Select SELd from the menu.
b) Set the type of indicator.
• L: The level indicated in millimeters or inches.
• %: The level indicated as a percentage. ASP2 corresponds to 0% and AEP2
corresponds to 100%.
• OFF: The display is off by default. When a button is pressed, the display
turns on for 30 seconds.
Quick Start Guide
Change display between length and percentage
3.4.4
While the level transmitter is in operating mode, it displays the set unit of measurement. It can display the level measurement in a different unit of measurement during operation mode.
For more information on setting the default unit, see Configure the display.
Procedure
1. Press up or down. The display shows the level measurement in a different unit of measurement.
2. Press up or down again to return it to the default unit of measurement or wait for 30 seconds.

Set output signals

The procedures in this section provide instructions for modifying the output signals.
Set output function for OUT1
Follow these steps to set the function for the output 1 (OUT1).
Procedure
1. Select ou1 from the menu.
2. Select a switching function.
• Hno: Hysteresis function / normally open
• Hnc: Hysteresis function / normally closed
• Fno: Window function / normally open
• Fnc: Window function / normally closed
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Note
Use the Hnc switching function if the switching output is used as an overflow prevention. The principle of normally closed operation ensures that the level transmitter also detects wire breaks or cable breaks.
Operation
Set switching limits (hysteresis)
Use these steps to set the hysteresis limits for the switching output.
Procedure
1. Ensure that the function Hno or Hnc is set for ou1 or ou2.
2. Select SP1 or SP2 then set the value at which the output is set.
3. Select rP1 or rP2 then set the value at which the output is reset.
Note
rPx is always smaller than SPx. The level transmitter accepts only values which are lower than the value for SPx. If SPx changes, rPx also changes provided that the lower end of the setting range is not reached.
Set switching limits (window)
Use these steps to set the limits for the window switching output.
Procedure
1. Ensure that the function Fno or Fnc is set for ou1 or ou2.
2. Select FH1 or FH2 then set the upper limit of the acceptable range.
3. Select FL1 or FL2 then set the lower limit of the acceptable range.
Note
FLx is always lower than FHx. The level transmitter accepts only values which are lower than the value for FHx. If FHx changes, FLx also changes provided that the lower end of the setting range is not reached.
Set switch-on delay for switching outputs
Follow these steps to set the switch-on delay for switching outputs.
Procedure
1. Select dS1 or dS2 from the menu.
2. Set the value between 0.0 and 60 seconds.
Note
The switch-on delay reacts according to VDMA. According to VDMA, the switch-on delay always effects SP and the switch-off delay always effects rP irrespective of whether the level transmitter uses the normally open or normally closed function.
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Operation
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Quick Start Guide
Set switch off delay for switching outputs
Follow these steps to set the switch-off delay for switching outputs.
Procedure
1. Select dr1 or dr2 from the menu.
2. Set the value between 0.0 and 60 seconds.
Note
The switch-on delay reacts according to VDMA. According to VDMA, the switch-on delay always effects SP and the switch-off delay always effects rP irrespective of whether the level transmitter uses the normally open or normally closed function.
Set output function for OUT2
Follow these steps to set the function for the output 2 (OUT2).
Procedure
1. Select ou2 from the menu.
2. Set the switching function:
• I: Current output 4-20 mA
• InEG: Current output 20-4 mA
• Hno: Hysteresis function/normally open
• Hnc: Hysteresis function/normally closed
• Fno: Window function/normally open
• Fnc: Window function/normally closed
Note
If using the output to prevent overflow, set ou2 = Hnc (NC function). The principle of normally closed operation ensures that wire break or cable break is also detected.
Scale analog signal
Follow these steps to modify the start and end points of the analog signal.
Procedure
1. Select ASP2 and set the analog start point.
2. Select AEP2 and set the analog end point.
Note
Setting these parameters with IO-Link is possible only if parameter ou2 = I or InEG.
For more information, see Analog signal.
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Operation
Set output logic for switching outputs
Follow these steps to set the output logic for switching outputs.
Procedure
1. Select P-n from the menu.
2. Set PnP or nPn.
Set response of the outputs in case of fault
Follow these steps to modify how an output responds to faults.
Procedure
1. Select FOU1 to modify the response for output 1 or FOU2 to modify the response for output 2 from the menu.
2. Set a value:
• On: Output switches ON in case of a fault.
The analog output switches to a value of greater than 21 mA in case of a fault.
• OFF: Switching output switches OFF in case of a fault.
The analog output switches to a value of less than 3.6 mA in case of a fault.
Fault examples
• Defective hardware
• Signal quality too low
Note
The level transmitter does not consider overflow to be a fault.
Set damping for measured signal
Follow these steps to set the damping time for a measured signal.
Procedure
1. Select dAP from the menu.
2. Set damping in seconds. The setting range is between 0.0 to 60.0 seconds.
For more information, see Damping function.
Set delay time in case of a fault
Follow these steps to set the delay time after which the level transmitter identifies a fault.
Procedure
1. Select dFo from the menu.
2. Set a value between 0.0 and 10.0 seconds.
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Operation
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Note
The parameter dFo is effective only in the case of a fault. Mind the dynamics of your application. In case of fast level changes, change the value step by step. For more information, see Fault states.
Quick Start Guide

3.4.5 Reset all parameters to factory default settings

Follow these steps to reset all of the parameter values to the default factory settings.
Procedure
1. Select rES from the menu.
2. Press Enter until rES is aligned right.
3. Press and hold up or down until the display shows ----.
4. Press Enter. The level transmitter reboots and resets the parameter values to the default factory settings.
3.4.6
Note
The level transmitter is operational only after entering basic settings. For more information, see Menu structure.

Change basic settings

Set these parameters after making any changes to the probe length or medium type.
Change the probe length
Modify the probe length parameter value after changing the length of the probe.
Procedure
1. Select LEnG from the menu.
2. Enter the probe length (L). Note the set unit of measurement uni.
3. Press Enter.
Note
After changing the probe length, review or modify the values for the switching limits. For more information, see Enter probe length.
Note
After changing the probe length, the unit deletes any existing tank adjustment. If necessary, perform a tank adjustment again. For more information, see Perform a
tank adjustment.
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Set to another medium
If the medium in the tank has changed, modify the parameters for the medium to match the new medium.
Procedure
1. Select MEdI from the menu.
2. Set the medium type.
• HIGH: For water and water-based media.
Operating mode is optimized for suppression of deposits on the probe.
• MId: For water-based media and media with a medium dielectric constant value
(oil-in-water emulsions). Operating mode optimized for the detection of media with increased foam
build-up.
3. Press Enter.
Note
In case of doubt, perform an application test to ensure that the setting is best suited for the medium.
3.4.7

Simulation

Simulation mode allows you to perform tests on the level transmitter while it simulates levels and error scenarios.
Set simulation value
The simulation value determines what error scenario the simulation shows.
Procedure
1. Select S.LvL from the menu.
2. Set the simulation value:
• Numerical value: level in millimeters or inches (depending on the basic setting)
• FULL: full state
• SEnS: weak measured signal
• Err: electronic fault found
• EPTY: empty state
3. Press Enter.
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Operation
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Quick Start Guide
Set simulation duration
The simulation duration parameter sets the length in time of the simulation.
Procedure
1. Select S.Tim from the menu.
2. Set time span for simulation.
Setting range: 1, 2, 3, 4, 5, 10, 15, 20, 30, 45, 60 minutes
Factory setting: three minutes
3. Press Enter.
Switch simulation on or off
Switching the simulation on starts the simulation and switching it off cancels the simulation.
Procedure
1. Select S.On from the menu.
2. Select On or OFF.
3. Press Enter.
Note
The simulation is active until Enter is pressed again or the time set via S.Tim elapses. During the simulation, the level transmitter displays SIM every three seconds. After the simulation, the level transmitter goes again to the parameter S.On and internally the level transmitter goes again to the operating mode (and the process value transmission).
After another 30 seconds the display goes again to the process value display.
Note
If using IO-Link to start and configure a simulation, it can be canceled only using IO­Link. The level transmitter displays C.Loc if the simulation is attempted to be canceled with the function buttons.

3.5 Using the transmitter

The procedures in this section provide instructions for operating the level transmitter.
3.5.1
38 Quick Start Guide

Operation with a single probe

Using the level transmitter with a single probe is suited for the detection of aqueous media, especially heavily soiled aqueous media.
Note
The level transmitter is intended only for operation with a single probe. A coaxial probe is not available for this unit.
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To correctly transfer the microwave pulse to the tank with optimum transmission power, the level transmitter needs a sufficiently large metal launching surface or launching plate.
For installation in closed metal tanks or metal bypass pipes, the tank lid or upper pipe section serves as a launching surface. Use a sufficiently large fixing plate, metal plate or something similar when installing in open metal tanks, plastic tanks, or metal tanks with plastic lids. For more information, see Installing in an open tank or Installing in a plastic
tank.

3.5.2 Operation with a bypass or still pipe

Use a bypass or a still pipe in applications like heavy foam build-up.
For more information about heavy foam build-up and turbulence, see Heavy foam build-
up and turbulence.
For more information about the minimum internal pipe diameter, see Installation in pipes.
For general installation instructions, see Installation.
3.5.3
3.5.4

Function check

After turning on the level transmitter, it is in operating mode. It measures and evaluates level and generates output signals according to the set parameters.
Check that the level transmitter is operating correctly before using it in a production environment.

Operation indication

These indicators show how the level transmitter is operating.
Indicator
---- continuous Initialization phase after power on
---- Level below the active zone
Numerical value + LED1Current level in millimeters
Numerical value + LED2Current level in inches
Numerical value + LED3Current level in percent of the scaled measuring range
Definition
Initially the level transmitter is not operational. Configure basic settings to enable the level transmitter (see Change basic settings).
LED 7 / LED 8 Switching status OUT2/OUT1
FULL + numerical value alternately
SIM + XXX Simulation active. XXX = state to be simulated (See Simulation)
S.On Simulation stopped (See Simulation)
Quick Start Guide 39
Level has reached or exceeded the maximum measuring range (= overflow warning).
Operation
January 2019 00825-0100-4326
Indicator Definition
Loc The level transmitter is locked using the function buttons. Setting
parameter values is not possible without unlocking the level transmitter. To unlock the level transmitter, press and hold up and down for 10 seconds.
uLoc The level transmitter is unlocked or the parameter setting is possible
again.
C.Loc The level transmitter is temporarily locked. Parameter setting via IO-Link
is active.
S.Loc The level transmitter permanently locked via IO-Link. Unlocking is
possible only via IO-Link.
Quick Start Guide

3.6 Setting parameters with IO-Link

During setup, send valid basic settings to the device even if the default settings correspond to the connected device. Enter the basic settings correctly according to the attached probe and the medium to be detected.
3.6.1

Set parameters using IO-Link

Use IO-Link software to set parameter settings on the level transmitter using a computer.
Procedure
1. Enter probe length (LEnG). Example: LEnG = 1000 mm.
2. Scale analog output (ASP2 and AEP2; AEP2 must at least be 20 % greater than ASP2). Example: AEP2 = 970 mm.
3. Alternatively: Set parameter ou2 to H.. or F...
4. Select the medium (MEdI). Example: MEdI = MId.
• HIGH = For water and water-based media. Operating mode is optimized for
suppression of deposits on the probe.
• MId = For water-based media and media with a mean dielectric constant value.
Operating mode is optimized for media with increased foam build-up.
5. Transfer the transmitter data to the unit.
6. Carry out tank adjustment depending on the installation (tREF or button "TEACH_TANK_REF".
To change the adjustment distance (RefDist), send this individual parameter to the transmitter first. Then, perform a tank adjustment. Select the adjustment distance according to, for example, the height of connection pieces or the position of structures in the tank. Within the adjustment distance, starting from the process connection, interfering reflections are compensated. Example: RefDist = 50 mm.
7. Modify any other parameter values.
Note
Only if data storage is required in an IO-Link application:
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IO-Link does not save tank adjustment information. After the level transmitter fails, perform another tank adjustment. The level transmitter reverts to the cyclical process data transmission after performing a tank adjustment successfully.
After a factory reset, the device reboots and the factory settings are restored.

3.6.2 Unit locking and data storage

The IO-Link master saves all parameters of the connected transmitter (except tank adjustment) if configured in the master (data storage). When a transmitter is replaced by a transmitter of the same type, the parameters of the old transmitter are automatically written to the new transmitter if configured in the master and if the transmitter allows this.
For safety reasons, the level transmitter can refuse the parameter download.
Factory default setting: Open
Data storage
• Open: the transmitter allows parameter download from the master
• Locked: the transmitter refuses parameter download from the master
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Quick Start Guide Troubleshooting and maintenance
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4 Troubleshooting and maintenance

The topics in this section provide information on identifying and resolving issues and maintaining the level transmitter.

4.1 Error indicators

This table describes error scenarios for the level transmitter and possible solutions.
Indicator Possible cause Recommended fix
Err Fault in the electronics. Replace the unit.
nPrb Probe detached from the unit; possibly
incorrect setting of the probe length.
SEnS Measurement disturbed by heavy foam
build-up or turbulence.
Measurement disturbed by separation layers (e.g. oil layer on water).
Probe or process connection soiled. Clean the probe and the process
Installation conditions not adhered to. • Observe the notes in Installation.
Probe length or sensitivity (setting to the medium) incorrect.
SCx + LED 7 SCx + LED 8
SC + LED 7 + LED 8
Flashing: short circuit in switching output OUT1 or OUT2.
Flashing: short circuit in both switching outputs
Check whether the probe is still attached to the unit. Check the parameter LEnG.
• Install the unit in a still pipe or
bypass (Installation)
• Set or increment dFo (Set delay
time in case of a fault)
Remove the oil layer by suction, stir the medium, verify the composition.
connection.
• Repeat or perform a tank
adjustment. (Tank adjustment)
Correct settings then perform a tank adjustment (Tank adjustment).
Remove the short circuit.
Remove the short circuit.
PArA Faulty data set Restore factory default settings (See
Reset all parameters to factory default settings)

4.2 Output response in different operating states

These tables provide information on the response of outputs for different operating states.
Operating state
Initialization OFF OFF
Quick Start Guide 43
OUT1 OUT2
(1)
Troubleshooting and maintenance Quick Start Guide
January 2019 00825-0100-4326
Operating state OUT1 OUT2
Normal operation According to the level and ou1
Fault OFF with FOU1 = OFF;
(1) If the analog function ou2 = I has been selected. If the switching function has been selected: see
column OUT1.
Additions to the analog output
Full signal With ou2 = I: 20 - 20.5 mA
Empty signal With ou2 = I: 4 - 3.8 mA

4.3 Maintenance

This section includes notes on maintaining the level transmitter.
• Keep the process connection free of deposits and foreign bodies.
• In case of heavy soiling: clean the process connection and probe. For cleaning
purposes, the level transmitter can be removed from the adapter and the probe can be screwed off the unit.
(1)
According to the level 4 - 20
setting
ON with FOU1 = On
With ou2 = InEG: 4 - 3.8 mA
With ou2 = InEG: 20 - 20.5 mA
mA
< 3.6 mA with FOU2 = OFF > 21 mA with FOU2 = On
CAUTION
Before installing or removing the unit:
— Ensure no pressure is applied to the system and there is no medium in the tank that
could leak.
— Note the potential dangers related to extreme machine and medium temperatures.
• Use only tools suitable for plastic surfaces for wetted surfaces.
• Ensure gasketed connections (probe or process connection adapter) are not soiled or
damaged. Check sealing rings for damage.
• Replace any damaged parts.
• After changing the medium, it may be necessary to change the settings of the level
transmitter. (See Set to another medium)
• IO-Link does not save tank adjustment information. After replacing the transmitter,
perform another tank adjustment. (See Perform a tank adjustment)
• It is not possible to repair the level transmitter.
• After use, dispose of the unit in an environmentally friendly way in accordance with the
applicable national regulations.
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• In case of returns, ensure that the unit is free from soiling, especially dangerous and
toxic substances.

4.3.1 Cleaning and maintenance in 3-A® applications

Follow these steps when cleaning the level transmitter in a 3-A compliant environment. Regularly perform clean out of place (COP) cleaning on the level transmitter to conform to 3-A standards.
Prerequisites
Before installing the level transmitter:
• Ensure that no pressure is applied to the system and that there is no media in the tank
that could leak.
• Note the potential dangers related to extreme machine and medium temperatures.
Procedure
1. Remove the probe from the unit.
2. Remove O-ring from the transmitter.
3. Remove O-ring from the groove and clean it.
4. Check O-ring and groove.
5. Reassemble the level transmitter.
4.3.2

Transport

When transporting the level transmitter, follow these guidelines to avoid damage.
• Use only appropriate packaging.
• If installed in a tank or pipe, protect the tank or pipe and the level transmitter against
shock and vibration. Protect the probe against deflections and vibrations. If necessary, fix at several points to prevent movement of unstable areas.
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46 Quick Start Guide
Quick Start Guide Setting ranges
00825-0100-4326 January 2019

5 Setting ranges

These tables show the setting ranges for the level transmitter parameters.
LEnG inch mm
Setting range 6.0 - 78.8 150 - 2000
Step increment 0.2 5
The setting ranges for the switching limits (SPx, rPx, FHx, FLx) depend on the probe length (L). In general the following applies:
Parameters inch mm
min max min max
SPx/FHx 0.6 L - 1.2 15 L - 30
rPx/FLx 0.4 L - 1.4 10 L - 35
Step increment 0.05 1
rPx/FLx is always smaller than SPx / FHx. If SPx / FHx is shifted, rPx / FLx also shifts provided that the lower end of the setting range is not reached. Always set SPx / FHx first, then rPx/ FLx.
The setting ranges for analog start point ASP2 and analog end point AEP2 depend on the probe length (L). In general the following applies:
Parameters
ASP2 0 N/A 0 N/A
AEP2 N/A L - 1.2 N/A L - 30
Step increment 0.05 1
inch mm
min max min max
Minimum distance between ASP2 and AEP2 is 20 percent of the active zone.
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48 Quick Start Guide
Quick Start Guide Product certifications
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6 Product certifications

6.1 European directive information

The most recent revision of the EC Declaration of Conformity can be found at
Emerson.com/Rosemount.

6.2 Ordinary location information

As standard, this product has been examined and tested to determine that the design meets the basic electrical, mechanical, and fire protection requirements by a nationally recognized test laboratory (NRTL) as accredited by the Federal Occupational Safety and Health Administration (OSHA).

6.3 3-A® certification

This product is authorized to display the 3-A symbol. Ensure gaskets and process connection accessories selected for installation meet both the application and 3-A requirements. A certificate of compliance is available at Emerson.com/Rosemount.

6.4 Other industry certifications

All Rosemount 326L transmitter surfaces and materials which come into contact with process medium comply with the following regulations:
Quick Start Guide 49
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50 Quick Start Guide
Quick Start Guide Factory settings
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7 Factory settings

Use this worksheet to record modified parameter settings.
Parameter Factory default setting User-defined setting
tREF nonE
SP1 50% VMR
rP1 0.2 in (5 mm) below SP1
ASP2 0 % VMR
AEP2 100 % VMR
dS1 0.0
dr1 0.0
ou1 Hno
ou2 I
(1)
(1)
(1)
uni inch
P-n PnP
FOU1 OFF
FOU2 OFF
SELd L
dAP 0.0
dFo 3.0
LEnG nonE
MEdl MID
S.LVL 50 % LEnG
S.Tim 3
S.On OFF
(1) VMR = final value of the measuring range = LEnG value minus 1.18 in (30 mm). When the LEnG
value is entered, the unit calculates the basic setting.
Quick Start Guide 51
*00825-0100-4326*
00825-0100-4326
Rev. 01
2019
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©
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Emerson Terms and Conditions of Sale are available upon request. The Emerson logo is a trademark and service mark of Emerson Electric Co. Rosemount is mark of one of the Emerson family of companies. All other marks are the property of their respective owners.
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