Endress+Hauser RIA16 User manual

Products Solutions Services
Operating Instructions
RIA16
Loop-powered field indicator
BA00280R/09/EN/06.23-00
71613276
2023-01-31

Table of contents RIA16
2 Endress+Hauser
Table of contents
1 About this document ................ 3
1.1 Symbols .............................. 3
1.2 Documentation ........................ 4
2 Basic safety instructions ............ 5
2.1 Requirements for the personnel ............ 5
2.2 Intended use .......................... 5
2.3 Workplace safety ....................... 5
2.4 Operational safety ...................... 5
2.5 Product safety ......................... 6
2.6 IT security ............................ 6
3 Incoming acceptance and product
identification ....................... 6
3.1 Incoming acceptance .................... 6
3.2 Product identification .................... 7
3.3 Storage and transport ................... 7
3.4 Certificates and approvals ................ 7
4 Mounting .......................... 8
4.1 Mounting requirements .................. 8
4.2 Mounting the measuring device ............ 9
4.3 Post-mounting checks .................. 10
5 Electrical connection .............. 10
5.1 Connecting the device .................. 11
5.2 Ensuring the degree of protection .......... 12
5.3 Post-connection check .................. 12
6 Operation options ................. 13
6.1 Overview of operation options ............ 13
6.2 Access to the operating menu via the
operating keys ........................ 13
6.3 Structure and function of the operating
menu .............................. 15
6.4 Access to the operating menu via the
operating tool ........................ 16
7 Commissioning .................... 17
7.1 Post-installation check .................. 17
7.2 Switching on the device ................. 17
7.3 Configuring the measuring device .......... 17
8 Diagnosis and troubleshooting ..... 21
8.1 General troubleshooting ................. 21
8.2 Diagnostic list ........................ 21
9 Maintenance ...................... 22
9.1 Cleaning ............................ 22
10 Repair ............................ 22
10.1 General information ................... 22
10.2 Spare parts .......................... 23
10.3 Return .............................. 24
10.4 Disposal ............................ 24
11 Accessories ....................... 24
11.1 Device-specific accessories ............... 25
11.2 Communication-specific accessories ........ 25
12 Technical data .................... 25
12.1 Input ............................... 25
12.2 Output ............................. 25
12.3 Power supply ......................... 26
12.4 Performance characteristics .............. 27
12.5 Mounting ........................... 27
12.6 Environment ......................... 27
12.7 Mechanical construction ................ 29
12.8 Human interface ...................... 29
12.9 Certificates and approvals ............... 31
12.10 Documentation ....................... 31

RIA16 About this document
Endress+Hauser 3
1 About this document
1.1 Symbols
1.1.1 Safety symbols
DANGER
This symbol alerts you to a dangerous situation. Failure to avoid this situation will result in
serious or fatal injury.
WARNING
This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in
serious or fatal injury.
CAUTION
This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in
minor or medium injury.
NOTICE
This symbol contains information on procedures and other facts which do not result in
personal injury.
1.1.2 Electrical symbols
Symbol Meaning
Direct current
Alternating current
Direct current and alternating current
Ground connection
A grounded terminal which, as far as the operator is concerned, is grounded via a
grounding system.
Potential equalization connection (PE: protective earth)
Ground terminals that must be connected to ground prior to establishing any other
connections.
The ground terminals are located on the interior and exterior of the device:
• Interior ground terminal: potential equalization is connected to the supply network.
• Exterior ground terminal: device is connected to the plant grounding system.
1.1.3 Symbols for certain types of information
Symbol Meaning
Permitted
Procedures, processes or actions that are permitted.
Preferred
Procedures, processes or actions that are preferred.
Forbidden
Procedures, processes or actions that are forbidden.
Tip
Indicates additional information.
Reference to documentation
A
Reference to page

About this document RIA16
4 Endress+Hauser
Symbol Meaning
Reference to graphic
Notice or individual step to be observed
1.
,
2.
,
3.
… Series of steps
Result of a step
Help in the event of a problem
Visual inspection
1.1.4 Symbols in graphics
Symbol Meaning Symbol Meaning
1, 2, 3,... Item numbers
1.
,
2.
,
3.
… Series of steps
A, B, C, ... Views A-A, B-B, C-C, ... Sections
-
Hazardous area
.
Safe area (non-hazardous area)
1.2 Documentation
For an overview of the scope of the associated Technical Documentation, refer to the
following:
•Device Viewer (www.endress.com/deviceviewer): Enter the serial number from the
nameplate
•Endress+Hauser Operations app: Enter serial number from nameplate or scan
matrix code on nameplate.
1.2.1 Document function
The following documentation may be available depending on the version ordered:
Document type Purpose and content of the document
Technical Information (TI) Planning aid for your device
The document contains all the technical data on the device and provides
an overview of the accessories and other products that can be ordered for
the device.
Brief Operating Instructions (KA) Guide that takes you quickly to the 1st measured value
The Brief Operating Instructions contain all the essential information
from incoming acceptance to initial commissioning.
Operating Instructions (BA) Your reference document
The Operating Instructions contain all the information that is required in
the various phases of the life cycle of the device: from product
identification, incoming acceptance and storage, to mounting,
connection, operation and commissioning through to troubleshooting,
maintenance and disposal.
Description of Device Parameters
(GP)
Reference for your parameters
The document provides a detailed explanation of each individual
parameter. The description is aimed at those who work with the device
over the entire life cycle and perform specific configurations.

RIA16 Basic safety instructions
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Document type Purpose and content of the document
Safety Instructions (XA) Depending on the approval, safety instructions for electrical equipment in
hazardous areas are also supplied with the device. The Safety Instructions
are an integral part of the Operating Instructions.
Information on the Safety Instructions (XA) relevant to the device is
provided on the nameplate.
Supplementary device-dependent
documentation (SD/FY)
Always comply strictly with the instructions in the relevant
supplementary documentation. The supplementary documentation is an
integral part of the device documentation.
2 Basic safety instructions
2.1 Requirements for the personnel
The personnel for installation, commissioning, diagnostics and maintenance must fulfill
the following requirements:
‣Trained, qualified specialists must have a relevant qualification for this specific function
and task.
‣Are authorized by the plant owner/operator.
‣Are familiar with federal/national regulations.
‣Before starting work, read and understand the instructions in the manual and
supplementary documentation as well as the certificates (depending on the
application).
‣Follow instructions and comply with basic conditions.
The operating personnel must fulfill the following requirements:
‣Are instructed and authorized according to the requirements of the task by the facility's
owner-operator.
‣Follow the instructions in this manual.
2.2 Intended use
• The device is a configurable field indicator with one sensor input.
• It is designed for mounting in the field.
• The manufacturer accepts no liability for damages resulting from improper or non-
intended use.
• Safe operation is only guaranteed if the Operating Instructions are observed.
• Only operate the device in the permitted temperature range.
2.3 Workplace safety
When working on and with the device:
‣Wear the required personal protective equipment as per national regulations.
2.4 Operational safety
Damage to the device!
‣Operate the device in proper technical condition and fail-safe condition only.
‣The operator is responsible for the interference-free operation of the device.

Incoming acceptance and product identification RIA16
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Modifications to the device
Unauthorized modifications to the device are not permitted and can lead to unforeseeable
dangers!
‣If modifications are nevertheless required, consult with the manufacturer.
Repair
To ensure continued operational safety and reliability:
‣Carry out repairs on the device only if they are expressly permitted.
‣Observe federal/national regulations pertaining to the repair of an electrical device.
‣Use only original spare parts and accessories.
2.5 Product safety
This measuring device is designed in accordance with good engineering practice to meet
state-of-the-art safety requirements, has been tested, and left the factory in a condition in
which it is safe to operate.
It meets general safety standards and legal requirements. It also complies with the EU
directives listed in the device-specific EU Declaration of Conformity. The manufacturer
confirms this by affixing the CE mark to the device.
2.6 IT security
Our warranty is valid only if the product is installed and used as described in the Operating
Instructions. The product is equipped with security mechanisms to protect it against any
inadvertent changes to the settings.
IT security measures, which provide additional protection for the product and associated
data transfer, must be implemented by the operators themselves in line with their security
standards.
3 Incoming acceptance and product
identification
3.1 Incoming acceptance
Proceed as follows on receipt of the device:
1. Check whether the packaging is intact.
2. If damage is discovered:
Report all damage immediately to the manufacturer.
3. Do not install damaged components, as the manufacturer cannot otherwise
guarantee the material resistance or compliance with the original safety
requirements, and can also not be held responsible for the consequences that may
result.
4. Compare the scope of delivery against the contents of your order.
5. Remove all the packaging material used for transportation.
6. Do the data on the nameplate match the ordering information on the delivery note?
7. Are the technical documentation and all other necessary documents provided, e.g.
certificates?
If one of the conditions is not satisfied, contact your Sales Center.

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Endress+Hauser 7
3.2 Product identification
The following options are available for identification of the device:
• Nameplate specifications
• Enter the serial number from the nameplate in the Device Viewer
(www.endress.com/deviceviewer): all the information about the device and an overview
of the Technical Documentation supplied with the device are displayed.
• Enter the serial number on the nameplate into the Endress+Hauser Operations App or
scan the 2-D matrix code (QR code) on the nameplate with the Endress+Hauser
Operations App: all the information about the device and the technical documentation
pertaining to the device is displayed.
3.2.1 Nameplate
The right device?
The nameplate provides you with the following information on the device:
• Manufacturer identification, device designation
• Order code
• Extended order code
• Serial number
• Tag name (TAG)
• Technical values: supply voltage, current consumption, ambient temperature,
communication-specific data (optional)
• Degree of protection
• Approvals with symbols
‣Compare the information on the nameplate with the order.
3.2.2 Name and address of manufacturer
Name of manufacturer: Endress+Hauser Wetzer GmbH + Co. KG
Address of manufacturer: Obere Wank 1, D-87484 Nesselwang or www.endress.com
3.3 Storage and transport
Storage temperature: –40 to +80 °C (–40 to +176 °F)
Maximum relative humidity: < 95 % as per IEC 60068-2-30
Pack the device for storage and transportation in such a way that it is reliably
protected against impact and external influences. The original packaging offers the
best protection.
Avoid the following environmental influences during storage:
• Direct sunlight
• Proximity to hot objects
• Mechanical vibration
• Aggressive media
3.4 Certificates and approvals
Current certificates and approvals for the product are available at www.endress.com on the
relevant product page:
1. Select the product using the filters and search field.
2. Open the product page.
3. Select Downloads.

Mounting RIA16
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3.4.1 UL approval
More information under UL Product iq™, search for keyword "E225237")
4 Mounting
4.1 Mounting requirements
The device is designed for use in the field.
Its orientation is determined by the readability of the display.
Operating temperature range:
• –40 to +80 °C (–40 to +176 °F)
• –20 to +80 °C (–4 to +176 °F) when the Open Collector output is used
Operating the device in the upper temperature limit range reduces the operating life
of the display.
The display may respond slowly at temperatures < –20 °C (–4 °F).
Readability of the display can no longer be guaranteed at temperatures
< –30 °C (–22 °F).
Operating altitude Up to 2 000 m (6 561.7 ft) above sea level
Overvoltage category Overvoltage category II
Pollution degree Pollution degree 2
4.1.1 Dimensions
The dimensions of the device are provided in the "Technical data" section of the Operating
Instructions.
133 (5.24)
199 (7.83)
96 (3.78)
158 (6.22)
1
115 (4.53)
163 (6.42)
A
A
A-A
A0011162
 1 Dimensions of the field indicator; dimension in mm (in)
1 Bore hole for mounting directly to wall or optional mounting plate with 4 screws ⌀ 5 mm (0.2 in)
4.1.2 Mounting location
For information on the conditions that must be present at the mounting location before
the device can be mounted correctly (such as ambient temperature, type of protection,
climate class etc.), see the "Technical data" section.

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Endress+Hauser 9
4.2 Mounting the measuring device
The device can either be mounted directly to the wall or mounted to the pipe or wall using
the optional mounting kit.
4.2.1 Direct wall mounting
To mount the indicator directly on the wall:
1. Drill 4 holes (see dimensions, →  1,  8)
2. Attach the device to the wall using 4 screws ⌀5 mm (0.2 in).
4.2.2 Pipe mounting
The mounting bracket is suitable for pipes with a diameter of 25 to 125 mm (1 to 5 in).
The mounting kit comprises a mounting plate (item 1), 2 metal strips (item 2) and 4
screws (item 3), →  2,  9.
To mount the indicator on a pipe:
1
2
1. 2.
A0011269
 2 Preparing for mounting
3mm
3. 4.
3
3
A0011270
 3 Attaching the indicator to the mounting plate

Electrical connection RIA16
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4.3 Post-mounting checks
Perform the following checks after mounting the device:
Device condition and specifications Note
Is the measuring device damaged? Visual inspection
Is the seal undamaged? Visual inspection
Is the device firmly screwed to the wall or mounting plate? -
Is the housing cover securely fitted? -
Does the device comply with the measuring point specifications (ambient
temperature, measuring range etc.)?
See "Technical data'
section".
5 Electrical connection
For information on the connection data, see the "Technical data" section.
NOTICE
Destruction or malfunction of parts of the electronics
‣ ESD - Electrostatic discharge. Protect the terminals from electrostatic discharge.
LCAUTION
Destruction of parts of the electronics
‣Switch off the power supply before installing and connecting the device.
NOTICE
Loss of Ex approval in case of improper connection.
‣When connecting devices certified for use in hazardous areas, ensure compliance with
all relevant instructions and connection schematics in the Ex-specific supplement to
these Operating Instructions.
First open the device housing.
A0011271
 4 Opening the field indicator housing

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Endress+Hauser 11
A0014935
 5 Installing the cable shield ground clamps (aluminum housing only)
5.1 Connecting the device
+
+
I
Y
-
-
+
I
Y
-
3
2
+
-
OC
+-1a1b
+-
23
+-1a 1b
+
+
I
Y
-
-
+-1a 1b
loop power
supply
active
passive
Terminal 2 and 3
Open Collector
loop power
supply
A0051980
 6 Field indicator terminal assignment
Terminal Terminal assignment Input and output
+ Measuring signal (+) 4 to 20 mA Signal input
- Measuring signal (-) 4 to 20 mA Signal input
1 Terminal for further instrumentation Support terminal
2 Digital limit switch (collector) Switch output
3 Digital limit switch (emitter) Switch output
Both the terminal assignment and the connection values of the field indicator correspond
to those of the hazardous area version. The device is only designed for operation in a

Electrical connection RIA16
12 Endress+Hauser
4 to 20 mA measuring circuit. There must be potential equalization along the measuring
circuits (inside and outside the hazardous area).
5.2 Ensuring the degree of protection
The devices meet all the requirements of IP67. In order to guarantee this after mounting
or after a service case the following points must be observed.
• The housing seal must be clean and undamaged when inserted into the groove. The seal
must be cleaned, dried or replaced if necessary.
• The cables used for connection must have the specified outer diameter (e.g. M20 x 1.5,
cable diameter 8 to 12 mm (0.3 to 0.47 in)). If possible, mount the measuring device so
that the cable entries point downwards.
• Replace unused cable entries with dummy plugs.
• Do not remove the grommet from the cable entry.
• The housing cover and cable entry must be firmly tightened.
A0011260
 7 Connection tips to retain IP67 protection
5.3 Post-connection check
Carry out the following checks once the electrical installation is complete:
Device condition and specifications Note
Are cables or the device damaged? Visual inspection
Electrical connection Note
Is the cable type route completely isolated? Without loops and crossovers? -
Are the mounted cables strain-relieved? -
Is the terminal assignment correct? Compare with the connection diagram of the terminal
block.
→  11
Are all terminal screws tightened? Visual inspection
Is the cable gland leak-tight? Visual inspection
Is the housing cover securely tightened? Visual inspection

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Endress+Hauser 13
6 Operation options
6.1 Overview of operation options
6.1.1 Display
1
2
6
5
4
3
1a
1b
A0011163
 8 LC display of the field indicator
1 Bargraph display 3 14-segment display for units and messages
1a Indicator for measuring range undershoot 4 ’Programming disabled’ symbol
1b Indicator for measuring range overshoot 5 Unit ’%’
2 Measured value display
Digit height 26 mm (1.02 in)
6 ’Failure’ warning symbol
6.2 Access to the operating menu via the operating keys
NOTICE
Loss of explosion protection when housing is open
‣The device must be configured outside the hazardous area.
A0011261
 9 Operating keys of the field indicator ("-", "+", "E")
During configuration, the display must remain connected to the electronics unit.
1. Open the housing cover.
2. The operating keys on the device are accessible.
6.2.1 Navigation
The operating panels are split into 2 levels.
Menu: In the Menu level, different menu items can be selected. The individual menu items
provide an aggregate of related operating functions.
Operating function: An operating function can be viewed as an aggregate of operating
parameters. The operating functions are used to operate and configure the device.

Operation options RIA16
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Operating keys:
"E" Enter key: Press and hold down the E key for longer than 3 seconds to access the
programming menu.
• Select operating functions.
• Accept values.
• Hold down the E key for longer than 3 seconds to jump to the Home position. A prompt
appears beforehand asking whether you want to save the data entered up to this point.
• Save data entered.
Selection keys ’+/-’:
• Select menus.
• Configure parameters and numerical values.
• After you select the operating function, press the + or - keys to enter the value or change
the setting.
Holding down the keys for an extended period accelerates the speed at which the
digits change.
If you press the + or - keys in the "Program Name" and "Program Version" operating
positions, the display scrolls horizontally because these positions (7-digit) cannot be
displayed completely in the 14-segment display .
6.2.2 Programming in the operating menu
E
E
E
E
E E E
7.
6.
5.
1.
2.
3.
4.
+
_
+
_
+
_
E
E
> 3 s
_
+
> 3 s
Menu
Operating function
A0051891
 10 Programming the field indicator
1. Go to the operating menu.
2. Select the menu using the "+" or "-" key.
3. Select the operating function.
4. Enter parameters in edit mode (enter/select data with "+" or "-" and accept with "E").
5. Go directly to the Home position. A prompt appears beforehand asking whether you
want to save the data entered up to this point.
6. Exit the menu with "+/-". A prompt appears, asking whether you want to save the
data entered up to this point.
7. Confirm the prompt asking whether you want to save the data: Select YES/NO with
the "+" or "-" key and confirm with "E".

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Endress+Hauser 15
6.3 Structure and function of the operating menu
Menu Operating function Operating function Operating function
Parameter Default/
Selection
Parameter Default/
Selection
Parameter Default/
Selection
Analog input
INPUT
Characteristic curve
CURV
Signal damping
DAMP
Decimal point of measured
value
DI DP
Linear LINAR 0 to 99 s 0 99.999 3 DEC
Squared SQRT 999.99 2 DEC
9 999.9 1 DEC
99 999 0 DEC
Measured value
scaling4 mA
DI LO
Measured value
scaling20 mA
DI HI
Measured value offset
OFFST
–
19 999 to 99
999
0.0 –
19 999 to 99
999
100.0 –
19 999 to 99
999
0.0
Display
DISPL
Dimension
DIM
Dimension 1)
DTEXT
None
%
Any
NO
%
TEXT
XXXXX
Limit
LIMIT
Mode of operation
MODE
Threshold
SETP
Off OFF –
19 999 to 99
999
0.0
Min.safety
with alarm
MIN
Max.safety
with alarm
MAX
Alarm ALARM
Hysteresis
HYST
Response delay
DELY
–
19 999 to 99
999
0.0 0 to 99 s 0.0
Operating
parameters
PARAM
User code
CODE
Program name
PNAME
Firmware version
FWVER
0 to 9 999 0
NAMUR
NAMUR
NAMUR 3.6 2)
N_360
NAMUR 3.80
N_380
Default dEF 0 to NAMUR
20.5
3.60 NAMUR 3.6
to NAMUR
20.5
3.80
User entry Edit
NAMUR 20.5
N2050
NAMUR 21.0
N2100
Test
TEST
NAMUR
3.80 to
NAMUR
21.0
20.5 20.5 to
25 mA
21.0 Off OFF
Open Collect. OUT
Display DISP
Service
SERV
Service code
SCODE
Reset parameter 3)
PRSET

Operation options RIA16
16 Endress+Hauser
Menu Operating function Operating function Operating function
Parameter Default/
Selection
Parameter Default/
Selection
Parameter Default/
Selection
---- Yes YES
No NO
1) Only if DIM = TEXT
2) Only if NAMUR = Edit
3) Only available for service personnel
6.4 Access to the operating menu via the operating tool
6.4.1 Configuration via interface & PC configuration software
FieldCare Device Setup
LWARNING
Loss of explosion protection when housing is open
‣The device must be configured outside the hazardous area.
During configuration with FieldCare, the device may assume undefined statuses! This may
result in the undefined switching of outputs and relays.
To configure the device using the FieldCare Device Setup software, connect the device to
your PC. You need a special interface adapter for this purpose: the Commubox FXA291.
The 4-pin connector of the interface cable must be plugged into the corresponding socket
in the device and the USB connector must be plugged into a free USB port on the PC.
Connecting the device
USB
1 2 3
A0051930
 11 Configuring the field indicator using an interface adapter
1 PC configuration software
2 Configuration kit USB box
3 Field indicator
When you connect the device, the device DTM (Device Type Manager) is not automatically
loaded in FieldCare, so you need to add the device manually.
Online configuration of parameters is not possible for the RIA14/16.
1. First add the Comm-DTM "PCP (Readwin) TXU10/FXA291" to an empty project.

RIA16 Commissioning
Endress+Hauser 17
2. In the Comm-DTM settings, set the baud rate to 2400 baud and select the COM port
used.
3. Add the device DTM "RIA14/16/Vx.xx.xx" to the project using the "Add device..."
function.
4. Continue with device configuration in accordance with these Operating Instructions.
The complete Setup menu, i.e. all of the parameters listed in these Operating
Instructions, can also be found in the FieldCareDevice Setup.
In general, it is possible to overwrite parameters with the FieldCare PC software and
the appropriate device DTM even if access protection is active. If access protection by
means of a code should be extended to the software, this function should be activated
in the extended device setup.
7 Commissioning
7.1 Post-installation check
Make sure that all installation and connection checks have been carried out before putting
the device into operation.
NOTICE
‣Before commissioning the device, make sure that the supply voltage matches the
voltage specifications on the nameplate. Failure to perform these checks may result in
damage to the device caused by the incorrect supply voltage.
7.2 Switching on the device
Switch on the supply voltage. During device initialization, all segments in the display are
displayed for approx. 1 second.
7.3 Configuring the measuring device
Description of the operating functions
The following table shows the menus available for the field indicator. These are explained in
detail in the sections that follow.
Function As shown on the display
Data processing INPUT
Display DISPL
Limit values LIMIT
Other settings PARAM
Service level SERV
7.3.1 Data processing (INPUT)
Input range
INPUT → CURVE → Options: Linear (LINAR) or square root (SQRT)
The input range is a 4 to 20 mA signal. Select the type of input signal here (linear or
square).

Commissioning RIA16
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Damping
INPUT → DAMP → Options: 0-99 (0 = no damping).
• Measured value damping can be set between 0 to 99 s .
• Only whole numbers can be entered.
• The factory setting is 0 (no damping).
Measured value scaling
Designation Description
Measured value
decimal point 'DI DP'
Indicates the number of decimal places (places after the decimal point) for the
numerical display of the measuring range
• Selection range 0-3 decimal places
• Default: 1 decimal place
If the number of decimal places is increased, the value for all the dependent operating
parameters must be recalculated based on the formula New value = Old value *
10(DPnew-DPold). If the value of one of the dependent operating parameters is < -19999
or > 99999, the number of decimal places cannot be increased and error message
C561 is shown on the display.
Measured value 0 % 'DI
LO'
Indicates the display value for the 4 mA value.
• Value range –19 999 to 99 999
• Default: 0.0
Measured value 100 %
'DI HI'
Indicates the display value for the 20 mA value.
• Value range –19 999 to 99 999
• Default: 100.0
Measured value offset
'OFFST'
Used to correct the display measured value. The offset is added to the measured value.
• Value range –19 999 to 99 999
• Default: 0.0
Measured value 0 % and 100 % should not be identical. However, the 0 % measured
value can be larger than the 100 % measured value (invert).
7.3.2 Display (DISPL)
Dimension
DIM → Options: NO, °C, K, °F, % or TEXT
You can choose one of the measurement units permanently stored in the display (°C, K, °F,
%). Alternatively, you can configure a unit of your choice on the 14-segment display
(TEXT).
The character set consists of the following characters: Characters A-Z, abcdhijlmnoruvwy,
the digits 0-9 and the special characters: - + * / ( ).
Configuring the editable unit (DTEXT)
DIM → DTEXT → Enter a unit that can be edited as required
To configure the editable unit, all 5 points on the 14-segment display must be configured.
Press the E key to edit the next letter. Accept the set unit with "E".

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Endress+Hauser 19
1.
2.
3.
4.
5.
E
E E E E
E
+/- +/- +/- +/- +/-
Esc
Esc Esc Esc
Esc
A0051908
Configuring the editable unit
1. Press the E key to select the desired operating function.
2. Press the E key to select the next point of the 5-digit 14-segment display.
3. Press the + or - key to select the next/previous character for the point selected.
4. If you press the +/- keys simultaneously, data entry is aborted and the operating
function is displayed.
5. When you confirm the fifth position of the display with E, the entry is accepted and
you switch to the operating function.
7.3.3 Limit values (LIMIT)
In the event of a limit value violation and a fault, the OC output is de-energized in
accordance with the closed circuit current principle.
If a limit value violation MIN (lower limit) occurs, ’LIMIN’ is displayed in the 14-segment
display. If a limit value violation MAX (upper limit) occurs, ’LIMAX’ is displayed.
Operating mode
LIMIT → MODE → Options OFF, MIN, MAX, ALARM
Use this function to select limit value and fault monitoring.
Options for selection: MIN, MAX, ALARM or OFF
• MIN = lower limit value
• MAX = upper limit value
• ALARM = in the event of a device fault
• Default: OFF = no limit value or fault monitoring
Switching threshold
LIMIT → SETP → Options –19 999 to 99 999
Measured value at which a change in the switching status occurs
• Value range: –19 999 to 99 999
• Default 0
Hysteresis
LIMIT → HYST → Options –19 999 to 99 999
Use this function to enter the hysteresis for the switching threshold at minimum/
maximum safety.

Commissioning RIA16
20 Endress+Hauser
• Value range: –19 999 to 99 999
• Default 0
Delay
LIMIT → DELY → Options 0 to 99 s
Setting of the response delay (in seconds) of the limit value event after reaching the
switching threshold.
• Value range: 0 to 99 s
• Default 0
7.3.4 Other settings (PARAM)
User code - Locking
PARAM → CODE → User code entry
The device can be locked to protect the processes against unauthorized and undesired
interference. The device parameters are protected by a 4-digit user code and cannot be
altered without entering the code.
User code: Once assigned, a user code can only be altered if the old code is entered to
enable the device. The new code can then be set.
• Value range: 0 to 9 999
• Default 0
Program information
Designation Description
Program name 'PNAME' Displays the name of the software loaded in the device (7-digit)
Display cannot be edited.
Firmware version 'FWVER' Displays the name of the firmware loaded in the device (8-digit)
Display cannot be edited.
Press the + or - key to scroll horizontally through the 7 or 8-digit display values.
Alarm limits (NAMUR)
PARAM → NAMUR
The alarm limits are set to NAMUR values at the factory. These values can be used as
default values (DEF) or edited freely (EDIT).
You can change the following operating items if the 'Edit' operating item has been selected:
Designation Description
NAMUR 3.6 Value range: 0 mA... < Namur 3.8
Default: 3.60
NAMUR 3.8 Value range: Namur 3.6 < x < Namur 20.5
Default: 3.80
NAMUR 20.5 Value range: Namur 3.8 < x < Namur 21.0
Default: 20.50
NAMUR 21.0 Value range: Namur 20.5 < x < Namur 25 mA
Default: 21.00