TI01251G/00/EN/02.17
71355021
Products Solutions Services
Technical Information
Tankside Monitor NRF81
Tank Gauging
Application
Tankside Monitor NRF81 is a robust gateway for collecting and integrating tank
gauging data in storage and process applications. It fulfills the exacting demands of
tank inventory management, inventory control, custody transfer, loss control, total
cost saving, and safe operation.
Typical areas of application
• Hydrostatic Tank Gauging
• Hybrid Tank Measurement Systems
Your benefits
• SIL2 certified (Min, Max, Continuous level)
• SIL3 (in preparation)
• Up to 6 SIL relay outputs
• Wide range of output signals including V1, Modbus RS 485, and HART protocol
• Integration of e.g. temperature, water level, pressure, overfill prevention sensor
• Robust IP66/68, NEMA Type 4x/6P enclosure
• Operation and display in a wide variety of local languages
Table of contents
Tankside Monitor NRF81
Document information ....................... 3
Symbols .................................... 3
Function and system design ................... 5
Integration of tank sensors ....................... 5
Input/output ............................... 6
HART Ex ia/IS active input ....................... 6
I/O modules ................................. 7
Power supply ............................. 13
Terminal assignment .......................... 13
Supply voltage .............................. 13
Cable entries ............................... 14
Cable specification ............................ 14
Overvoltage protection ......................... 14
Installation ............................... 15
Installation conditions ......................... 15
Environment .............................. 17
Ambient temperature range ..................... 17
Classification of environmental conditions according to
DIN EN 60721-3-4 ........................... 17
Storage temperature .......................... 17
Humidity .................................. 17
Degree of protection .......................... 17
Shock resistance ............................. 17
Vibration resistance ........................... 17
Electromagnetic compatibility (EMC) ............... 17
Ordering information ....................... 25
Ordering information .......................... 25
Marking .................................. 25
Application packages ....................... 26
Advanced tank measurement methods .............. 26
Accessories ............................... 31
Device-specific accessories ...................... 31
Communication-specific accessories ................ 32
Service-specific accessories ...................... 32
System components ........................... 32
Documentation ............................ 33
Technical Information (TI) ...................... 33
Brief Operating Instructions (KA) .................. 33
Operating Instructions (BA) ..................... 33
Description of Device Parameters (GP) ............... 33
Safety instructions (XA) ........................ 34
Registered trademarks ...................... 35
Custody transfer approval ................... 18
Mechanical construction .................... 19
Dimensions ................................ 19
Weight ................................... 19
Materials .................................. 20
Operability ............................... 21
Operating concept ............................ 21
Operating options ............................ 21
Local operation .............................. 21
Remote operation ............................ 22
Operation via service interface .................... 22
Certificates and approvals ................... 23
CE mark ................................... 23
RCM-Tick marking ............................ 23
Ex approval ................................ 23
Single seal according to ANSI/ISA 12.27.01 ........... 23
Functional Safety (SIL) ......................... 23
WHG ..................................... 23
Weight & Measure approval ..................... 23
Non-ionizing radiation protection .................. 23
Other standards and guidelines ................... 23
2 Endress+Hauser
Tankside Monitor NRF81
DANGER
WARNING
CAUTION
NOTICE
A
Document information
Symbols Safety symbols
Symbol Meaning
Electrical 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.
NOTE!
This symbol contains information on procedures and other facts which do not result in
personal injury.
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.
Protective ground connection
A terminal which must be connected to ground prior to establishing any other
connections.
Equipotential connection
A connection that has to be connected to the plant grounding system: This may be a
potential equalization line or a star grounding system depending on national or
company codes of practice.
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
Reference to page
Reference to graphic
Visual inspection
Endress+Hauser 3
Symbols in graphics
1.
-
.
Symbol Meaning
1, 2, 3 ... Item numbers
, 2., 3.… Series of steps
A, B, C, ... Views
A-A, B-B, C-C, ... Sections
Symbols at the device
Symbol Meaning
Safety instructions
Observe the safety instructions contained in the associated Operating Instructions.
Temperature resistance of the connection cables
Specifies the minimum value of the temperature resistance of the connection cables.
Tankside Monitor NRF81
Hazardous area
Indicates a hazardous area.
Safe area (non-hazardous area)
Indicates the non-hazardous area.
4 Endress+Hauser
Tankside Monitor NRF81
2 2
3
3
1 1
HART
4-20 mA
A
B
HART
4-20 mA
HART
HART
4
55
6 6
4
Function and system design
Integration of tank sensors
The Tankside Monitor is a field device for the integration of tank sensors into tank inventory
systems. It is typically installed at the bottom of the tank and allows access to all connected tank
sensors. All measured and calculated values can be displayed at the on-site display. Via a field
communication protocol, they can be transferred to an inventory control system.
A0023766
1 Integration of tank sensors with Tankside Monitor (Example)
A HART multidrop mode
B HART and analog mode
1 Pressure transmitter
2 Level radar
3 Average temperature transmitter
4 Tankside Monitor
5 Field protocol transmits data to an inventory control system
6 Inventory control system (e.g. Tankvision NXA820 or Tankvision Professional NXA85)
Typical values measured by the sensors are:
• Level
• Spot temperature
• Average temperature
• Water level
• Pressure
• Secondary level value (for critical applications)
Endress+Hauser 5
HART Ex ia/IS active input
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Tankside Monitor NRF81
Input/output
A0027364
2 HART Ex ia/IS active input
E1 HART +
E2 HART -
The device has a HART Ex ia/IS active input. Additional features are provided if the following
Endress+Hauser devices are connected:
• Prothermo NMT
The measured level is transmitted to the Prothermo. Prothermo uses this level to calculate the
average temperature of the product.
• Micropilot S FMR53x
The calculated distance correction factor or distance correction value is sent to the Micropilot.
Micropilot uses this value to indicate the corrected level at its local display.
Technical data
Transmitter power supply voltage 23.0 V - 380 Ω ⋅ I
Maximum load 500 Ω including signal line
Maximum current of all connected devices 24 mA
load
The HART Ex ia/IS active input is available by default. It needs not to be chosen explicitly when
ordering a device.
6 Endress+Hauser
Tankside Monitor NRF81
E
G
F
1
1
1
1 3
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2 4
HR
CDI
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POWER
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C
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NRF81 - XX xx xxxxxx ...
040
NRF81 - xx XX xxxxxx ...
050
I/O modules Overview
3 Position of the I/O modules in the terminal compartment
The terminal compartment contains up to four I/O modules, depending on the order code.
• Modules with four terminals can be in any of these slots.
• Modules with eight terminals can be in slot B or C.
The exact assignment of the modules to the slots is dependent on the device version. For a
detailed description refer to the Operating Instructions of the device in question.
The following restrictions apply when selecting the modules:
• The device may contain a maximum of four I/O modules.
• A maximum of two I/O modules with 8 terminals is possible.
A0027363
Ordering feature 040: "Primary Output"
Option Number of I/O modules Type of I/O module Number of terminals Technical data
A1 1 Modbus RS485 4 → 8
B1 1 V1 4 → 9
E1 1 4-20mA HART Ex d/XP 8 → 10
H1 1 4-20mA HART Ex i/IS 8 → 10
Ordering feature 050: "Secondary IO Analogue"
Option Number of I/O
modules
A1 1 1 x "Ex d/XP 4-20mA HART + RTD input" 1 x 8 → 10
A2 2 2 x "Ex d/XP 4-20mA HART + RTD input" 2 x 8 → 10
B1 1 1 x "Ex i/IS 4-20mA HART+ RTD input" 1 x 8 → 10
B2 2 2 x "Ex i/IS 4-20mA HART+ RTD input" 2 x 8 → 10
C2 2 1 x "Ex i/IS 4-20mA HART + RTD input"
X0 0 none 0 -
Type of I/O module Number of terminals Technical data
2 x 8 → 10
1 x "Ex d/XP 4-20mA HART + RTD input"
Endress+Hauser 7
Tankside Monitor NRF81
NRF81 - xx xx XXxxxx ...
060
Ordering feature 060: "Secondary IO Digital Exd"
Option Number of I/O modules Type of I/O module Number of terminals Technical data
A1 1 1 x "2x relay + 2x discrete I/O" 1 x 4 → 12
A2 2 2 x "2x relay + 2x discrete I/O" 2 x 4 → 12
A3 3 3 x "2x relay + 2x discrete I/O" 3 x 4 → 12
B1 1 1x "Modbus RS485" 1 x 4 → 8
B2 2 1x "Modbus RS485"
1 x "2x relay + 2x discrete I/O"
B3 3 1x "Modbus RS485"
2 x "2x relay + 2x discrete I/O"
X0 0 none 0 -
"Modbus RS485": Technical data
No. of units Maximum 15 instruments per loop
Baud rate Selectable:
• 600 bit/s
• 1 200 bit/s
• 2 400 bit/s
• 4 800 bit/s
• 9 600 bit/s
• 19 200 bit/s
Parity Selectable:
• Odd
• Even
• None
Cable Three-wire cable with screening. The screening must be connected inside the housing.
Termination resistors To be set as required in specific environments
Topology • Serial bus
• Tree structure
Transmission distance Maximum 1 200 m (3 900 ft) including limbs or branches;
branches under 3 m (9.8 ft) are negligible
Instrument address Each transmitter has an individual bus address configured in the software of the
transmitter.
Isolation Bus inputs are electrically isolated from the other electronics.
Error on alarm Error message classified according to NAMUR NE 107
2 x 4 → 8
→ 12
3 x 4 → 8
→ 12
8 Endress+Hauser
Tankside Monitor NRF81
"V1": Technical data
No. of units Maximum 10 instruments per loop
Baud rate 3 300 bit/s
Parity Selectable:
• Odd
• Even
• None
Cable • Two-wire twisted pair; screening recommended
• Two-wire unscreened
Termination resistors Not required
Topology • Serial bus
• Tree structure
Transmission distance Maximum 6 000 m (19 700 ft)
Instrument address Each transmitter has an individual bus address configured in the software of the
transmitter.
Isolation Serial communication circuit isolated from other circuits
Error on alarm Error message classified according to NAMUR NE 107
Endress+Hauser 9
Tankside Monitor NRF81
"4-20mA HART" I/O module (Ex d/XP or Ex i/IS): Technical data
General data
No. of units Max. 6 instruments per loop
Baud rate 1 200 bit/s
Cable Two-wire, twisted pair screened cable;
Core cross section: 0.2 to 2.5 mm2 (24 to 13 AWG)
Topology • Serial bus
• Tree structure
Transmission distance Maximum 1 200 m (3 900 ft)
Instrument address Each transmitter on a signal loop has an individual bus address. This is defined within
the transmitter software and / or auxiliary configuration environment such as host
system or Field Communicator 475.
Isolation Bus inputs are electrically isolated from the other electronics
Input data
Input operating modes • 4..20mA input (1 external device)
• HART master+4..20mA input (1 external device)
• HART master (up to 6 external devices)
Internal load (to ground) 400 Ω
Measuring range 0 to 26 mA
Accuracy ±15 µA (after linearization and calibration)
Connection of a Prothermo
NMT
Connection of a Micropilot S
FMR5xx
Connection of a RTD
temperature probe
The measured level is transmitted to the Prothermo. Prothermo uses this level
to calculate the average temperature of the product.
• The auxiliary energy for the Micropilot S can be supplied by the analogue
I/O module
• The calculated distance correction factor or distance correction value is sent
to the Micropilot. Micropilot uses this value to indicate the corrected level at
its local display.
2-, 3- or 4-wire connection
Output data
Output operating modes • 4..20mA output
• HART slave +4..20mA output
Output current 3 to 24 mA
Accuracy ±15 µA (after linearization and calibration)
Error on alarm HART error message classified according to NAMUR NE 107
10 Endress+Hauser
Tankside Monitor NRF81
D
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C
B
A
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1
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1 3
2
2 4
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HR
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-
+
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SIM
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B
A
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Data for passive usage (input or output)
A0033030
4 Passive input or output: Use terminals 1 and 2
Minimum terminal voltage 10.4 V
Maximum terminal voltage 29 V
Data for active usage (input or output)
5 Active input or output: Use terminals 2 and 3
Transmitter power supply voltage
(Ex d/XP)
Transmitter power supply voltage
(Ex i/IS)
Output load max. 500 Ω including signal line
18.5 V - 360 Ω ⋅ I
20.0 V - 360 Ω ⋅ I
load
load
A0033031
Endress+Hauser 11
Tankside Monitor NRF81
"Digital I/O module": Technical data
Output
Relay switching power for resistive load • 30 VDC @ 2 A
• 250 VDC @ 0.1 A
• 250 VAC @ 2 A
Relay type normally open;
can be set to "normally closed" by a software option
Input
Maximum pick-up voltage • 250 V
Minimum pick-up voltage • 25 V
• 250 V
• 5 V
DC
AC
DC
AC
Current consumption at maximum voltage • ≤ 1 mA (DC)
• ≤ 2 mA (AC)
1) In case of a power supply failure, the switching state is always "open", irrespectiv of the selected software
option.
1)
12 Endress+Hauser
Tankside Monitor NRF81
D
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G
1
3
2
POWER
G1 N
G3 L
AC 85...264 V
Terminal assignment
Power supply
A0027362
6 Terminal compartment (typical example) and ground terminals
Supply voltage
Terminal area Module
Up to four I/O modules, depending on the order code
• Modules with four terminals can be in any of these slots.
A/B/C/D
(slots for I/O modules)
• Modules with eight terminals can be in slot B or C.
The exact assignment of the modules to the slots is dependent on the device
version. For a detailed description refer to the Operating Instructions of the
device in question.
E HART Ex i/IS interface
• E1: H+
• E2: H-
F Remote display (in preparation)
Power supply: 85 to 264 V
G
• G1: N
• G2: not connected
AC
• G3: L
Protective ground connection
A0018339
85 to 264 VAC, 50/60 Hz, 28.8 VA
1)
1) maximum value; actual value depending on modules installed
Endress+Hauser 13
Tankside Monitor NRF81
Cable entries
Ordering feature 090 "Electrical Connection"
A 7 x thread M20
B 7 x thread M25
C 7 x thread G1/2
D 7 x thread G3/4
E 7 x thread NPT1/2
F 7 x thread NPT3/4
1) Position 13 of the order code, e.g. NMx8x-xxxxxxxxxxxxA...
For the following devices with TIIS Ex d approval, cable glands are attached to the device (see
position 1 and 2 of the order code). These cable glands must be used.
Tankside Monitor NRF81-TA...
Cable specification Terminals
Terminal Wire cross section
Signal and power supply
• Spring terminals (NRF81-xx1...)
• Screw terminals (NRF81-xx2...)
Ground terminal in the terminal compartment max. 2.5 mm2 (13 AWG)
Ground terminal at the housing max. 4 mm2 (11 AWG)
1)
Cable entries (with blind plugs)
0.2 to 2.5 mm2 (24 to 13 AWG)
Overvoltage protection
Power supply line
Standard device cable is sufficient for the power line.
HART communication line
• Standard device cable is sufficient if only the analog signal is used.
• Shielded cable is recommended if using the HART protocol. Observe the grounding concept of the
plant.
Modbus communication line
• Observe the cable conditions from the TIA-485-A, Telecommunications Industry Association.
• Additional conditions: Use shielded cable.
V1 communication line
• Two wire (twisted pair) screened or un-screened cable
• Resistance in one cable: ≤ 120 Ω
• Capacitance between lines: ≤ 0.3 µF
On the communication and power lines; according to IEC 60060-1 /DIN 60079-14:
10 kA, 8/20 μs, 10 pulses according to IEC 60060-1 / DIN 60079-14
14 Endress+Hauser
Tankside Monitor NRF81
150 (5.9)
150 (5.9)
ø
13.5 (0.53)
M12
≤15 Nm (11.06 lbf ")
≤15 Nm (11.06 lbf ")
Installation
Installation conditions Wall mounting
7 Wall mounting of the Tankside Monitor
A0029901
Pipe mounting
A mounting kit consisting of two brackets and four nuts can be ordered with the device. It can be
used for mounting the Tankside Monitor on horizontal or vertical pipes.
Ordering feature 620 "Accessory enclosed" Mounting kit
PV Mounting kit, pipe, DN32-50 (1-1/4" - 2")
PW Mounting kit, pipe, DN80 (3")
8 Mounting of the Tankside Monitor at a vertical pipe
A0029899
Endress+Hauser 15
≤15 Nm (11.06 lbf ")
9 Mounting of the Tankside Monitor at a horizontal pipe
Tankside Monitor NRF81
A0029900
16 Endress+Hauser
Tankside Monitor NRF81
Environment
Ambient temperature range
Classification of environmental conditions according to DIN EN 60721-3-4
Storage temperature
Humidity
Degree of protection
Shock resistance
Vibration resistance
Device –40 to +60 °C (–40 to +140 °F)
Display module –20 to +70 °C (–4 to +158 °F)
The readability of the display may be impaired at temperatures outside this
temperature range.
4K5, 4K6, 4B1, 4M7, 4Z2, 4Z3, 4Z8
–50 to +80 °C (–58 to +176 °F)
≤ 95 %
• IP68/66 according to DIN EN 60529
• Type 6P/4x according to NEMA 250
• 30 g (18 ms) according to DIN EN 60068-2-27 (1993)
• Classification according to DIN EN 60721-3-4: 4M7
• 20 to 2 000 Hz, 1 (m/s2)2/Hz according to DIN EN 60068-2-64 (1994)
• This corresponds to an acceleration value of 4.5 g and fulfills class 4M7 of DIN EN 60721-3-4
(1995)
Electromagnetic compatibility (EMC)
• Transient emissions according to DIN EN 61326, class B
• Interference resistance according to DIN EN 61326, Appendix A (Industry use) and NAMUR
recommendation NE21
Endress+Hauser 17
Custody transfer approval
Tankside Monitor NRF81
Ordering feature 150 "Weight
+ Measure Approval"
ICR Standard version, without calibration certificate
NTC Custody transfer type approval according to NMi, OIML R85, API 3.1B,
PTC (in preparation) Custody transfer type approval per PTB, factory calibration certificate
1) Position 14 to 16 in the order code (e.g. NRF8x-xxxxxxxxxxxxxICR...)
1)
Accuracy properties (compared to the connected level gauge as defined in
OIML R85)
ISO4622, factory calibration certificate
18 Endress+Hauser
Tankside Monitor NRF81
310 (12.2)
215 (8.46)
206 (8.11)
Mechanical construction
Dimensions Housing
Weight
A0023874
10 Dimensions of Tankside Monitor NRF81; unit of measurement: mm(in); adapters for cable entries are not
taken into account in this drawing.
Housing with electronics: approx. 12 kg (26 lb)
Endress+Hauser 19
Materials Materials of housing
1
2
4
3
5
6
7
9
10
8
Tankside Monitor NRF81
A0026339
Pos. Part Materials for Aluminum version
1 Housing AC 43000 T6 316L (1.4404)
2 Cover • Cover: AC 43000 T6
• Window: Glass
• Seal: FVMQ
• Thread-coating: Graphite-based
lubricant varnish
3 Cover lock • Capstan screw: 316L (1.4404)
• Clamp: 316L (1.4435)
4 Tag for measuring
point label
5 Pressure release
stopper
6 Nameplate • Sticker: Plastic
7 Mounting plate AC 43000 T6 316L (1.4404)
8 Dummy screws for
weather protection
cover
9 Dummy plug, cable
gland or adapter
10 Ground terminal • Screw: A4-70
316L (1.4404) 316L (1.4404)
• Stopper: 316L (1.4404)
• O-ring: EPDM
• Sealing screw: A4
• O-ring: FKM
• Screw: A4-70
• O-ring: EPDM
• Dummy plug
3)
– 1.4435
– LD-PE
• Adapter:
– Ms/Ni (TIIS)
– 1.4404 (other versions)
• Seal:
– EPDM
– NBR
– PTFE tape
• Spring washer: A4
• Clamp and holder: 316L (1.4404)
1)
Materials for stainless steel version
• Cover: 316L (1.4404)
• Window: Glass
• Seal: FVMQ
• Thread-coating: Graphite-based
lubricant varnish
• Capstan screw: 316L (1.4404)
• Clamp: 316L (1.4435)
• Stopper: 316L (1.4404)
• O-Ring: EPDM
• Nameplate: 316L (1.4404)
• Groove pins: 316Ti (1.4571)
• Sealing screw: A4
• O-ring: FKM
• Screw: A4-70
• O-ring: EPDM
• Dum my plug
– 1.4435
– LD-PE
• Adapter:
– Ms/Ni (TIIS)
– 1.4404 (other versions)
• Seal:
– EPDM
– NBR
– PTFE tape
• Screw: A4-70
• Spring washer: A4
• Clamp and holder: 316L (1.4404)
2)
1) Ordering feature 070 "Housing", Option "AA"; position 11/12 of the order code: NXXXX-xxxxxxxxxxAA...
2) Ordering feature 070 "Housing", Option "BA"; position 11/12 of the order code: NXXXX-xxxxxxxxxxBA...
3) Depending on device version
20 Endress+Hauser
Tankside Monitor NRF81
1
E
Operability
Operating concept
Operating options
Operator-oriented menu structure for user-specific tasks
• Commissioning
• Operation
• Diagnostics
• Expert level
Operating languages
• English
• German
• Japanese
Feature 500 of the product structure determines which of these languages is preset on delivery.
Quick and safe commissioning
• Guided menus ("Make-it-run" wizards) for applications
• Menu guidance with brief explanations of the individual parameter functions
Reliable operation
Standardized operation at the device and in the operating tools
Efficient diagnostics increase measurement reliability
• Remedy information is integrated in plain text
• Diverse simulation options
• Local display; operation via the local display is possible without opening the device.
• Tank Gauging system
• Plant Asset Management tool (e.g. FieldCare); connected via
– HART
– Service port (CDI)
Local operation
11 Local operation of the Tankside Monitor NRF81
1 Display and operating module
Display elements
• 4-line display
• White background lighting; switches to red in event of device errors
• Format for displaying measured variables and status variables can be individually configured
• Permitted ambient temperature for the display: –20 to +70 °C (–4 to +158 °F)
The readability of the display may be impaired at temperatures outside the temperature range.
Operating elements
• External operation via touch control; 3 optical keys:
, ,
• Operating elements also accessible in various hazardous areas
A0025574
Endress+Hauser 21
Remote operation
NXA820
5
6
4
1 2 3
7
CDI
1
2
3
Tankside Monitor NRF81
A0025621
12 Remote operation of Tank Gauging devices
1 Proservo NMS8x
2 Tankside Monitor NRF81
3 Micropilot NMR8x
4 Field protocol (e.g. Modbus, V1)
5 Tankvision Tank Scanner NXA820
6 Ethernet
7 Computer with operating tool (e.g. FieldCare)
Operation via service interface
A0025572
13 Operation via service interface
1 Service interface (CDI = Endress+Hauser Common Data Interface)
2 Commubox FXA291
3 Computer with "FieldCare" operating tool and "CDI Communication FXA291" COM DTM
22 Endress+Hauser
Tankside Monitor NRF81
Certificates and approvals
CE mark
RCM-Tick marking
Ex approval
Single seal according to ANSI/ISA 12.27.01
The measuring system meets the legal requirements of the applicable EC guidelines. These are listed
in the corresponding EC Declaration of Conformity together with the standards applied.
Endress+Hauser confirms successful testing of the device by affixing to it the CE mark.
The supplied product or measuring system meets the ACMA (Australian Communications and Media
Authority) requirements for network integrity, interoperability, performance characteristics as well
as health and safety regulations. Here, especially the regulatory arrangements for electromagnetic
compatibility are met. The products are labelled with the RCM- Tick marking on the name plate.
A0029561
The devices are certified for use in hazardous areas and the relevant safety instructions are provided
in the separate "Safety Instructions" (XA) document. Reference is made to this document on the
nameplate.
The devices have been designed according to ANSI/ISA 12.27.01 as single seal devices, allowing the
user to waive the use and save the cost of installing external secondary process seals in the conduit
as required by the process sealing sections of ANSI/NFPA 70 (NEC) and CSA 22.1 (CEC) These
instruments comply with the North-American installation practice and provide a very safe and costsaving installation for pressurized applications with hazardous fluids.
Further information can be found in the Safety Instructions (XA) of the relevant devices.
Functional Safety (SIL)
WHG
Weight & Measure approval
Non-ionizing radiation protection
Other standards and guidelines
Use for level monitoring (MIN, MAX, range) up to SIL 2 according to IEC 61508:2010.
For details refer to the "Functional Safety Manual":
SD01929G (NRF81)
in preparation
• OIML R85 (2008)
• NMi
• PTB (in preparation)
• PAC
• LNE (in preparation)
• WELMEC
• GOST (in preparation)
The device has a sealable locking switch according to the Weight & Measure requirements. This
switch locks all software parameters related to the measurement. The switching status is
indicated on the display and via the communication protocol.
According to guideline 2004/40/EG-ICNIRP Guidelines EN50371
Industry standards
• Directive 2002/95/EC: "Restriction of Hazardous Substances Directive" (RoHS)
• Directive 2004/22/EC: "Measuring Instruments Directive" (MID)
• IEC61508: "Functional Safety of Electrical/Electronic/Programmable Electronic Safety-related
Systems" (SIL)
• NACE MR 0175, NACE MR 0103: "Sulfide stress cracking resistant metallic materials for oilfield
equipment"
• API Recommended Practice 2350: "Overfill Protection for Storage Tanks in Petroleum Facilities"
• API MPMS: "Manual of Petroleum Measurement Standards"
• EN 1127: "Explosive atmospehres - Explosion prevention and protection"
• IEC 60079: "Equipment protection"
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Tankside Monitor NRF81
• EN 1092: "Flanges and their joints"
• EN 13463: "Non-electrical equipment for use in potentially explosive atmospheres"
• TIA-485-A: "Electrical Characteristics of Generators and Receivers for Use in Balanced Digital
Multipoint Systems "
• IEC61511: "Functional safety - Safety instrumented systems for the process industry sector"
• IEEE 754: "Standard for Binary Floating-Point Arithmetic for microprocessor systems "
• ISO4266: "Petroleum and liquid petroleum products - measurement of level and temperature in
storage tanks by automatic methods"
• ISO6578: "Refrigerated hydrocarbon liquids - Static measurement - Calculation procedure"
• ISO 11223: "Petroleum and liquid petroleum products - Determination of volume, density and
mass of the contents of verical cylindrical tanks by Hybrid Tank Measurement Systems"
• ISO15169: "Petroleum and liquid petroleum products - Direct static measurement - Measurement
of content of vertical storage tanks by hydrostatic tank gauging"
• JIS K2250: "Petroleum Measurement Tables"
• JIS B 8273: "Bolted flange for pressure vessels"
• G.I.I.G.N.L.: "LNG Custody transfer handbook"
• NAMUR NE043: "Standardization of the Signal Level for the Failure Information of Digital
Transmitters"
• NAMUR NE107: "Self-Monitoring and Diagnosis of Field Devices"
• PTBA-A-4.2: "Volume measuring devices for liquids in a stationary condition - Storage containers
and their measuring devices"ur
Metrological standards
• OIML R85 (2008) "Requirements for ambient temperature low –25 °C (–13 °F) and ambient
temperature high +55 °C (+131 °F)
• "Mess- und Eichverordnung" (Calibration regulations for the Federal Republic of Germany)
• Directive 2004/22/EC of the European Parliament and of the Council of 31 March 2004 on
measuring instruments
24 Endress+Hauser
Tankside Monitor NRF81
Ordering information
Ordering information
Marking
Detailed ordering information is available from the following sources:
• In the Product Configurator on the Endress+Hauser website: www.endress.com -> Click "Corporate"
-> Select your country -> Click "Products" -> Select the product using the filters and search field ->
Open product page -> The "Configure" button to the right of the product image opens the Product
Configurator.
• From your Endress+Hauser Sales Center: www.addresses.endress.com
Product Configurator - the tool for individual product configuration
• Up-to-the-minute configuration data
• Depending on the device: Direct input of measuring point-specific information such as
measuring range or operating language
• Automatic verification of exclusion criteria
• Automatic creation of the order code and its breakdown in PDF or Excel output format
• Ability to order directly in the Endress+Hauser Online Shop
Option of ordering feature 895
"Marking"
Z1 Tagging (TAG)
Z2 Bus address
Optionally, the device can be ordered with a specific tagging and/or bus address according to the
table above. When the respective option is selected, the tag or bus address must be defined in an
additional specification.
Meaning
Endress+Hauser 25
Application packages
1
2 3
2
4 1
3
Tankside Monitor NRF81
Advanced tank measurement methods
Direct level measurement modes
Measuring mode
Level only
1 Level transmitter (e.g. typically FMR540, FMR51,.. but not NMR8x or NMS8x)
2 Tankside Monitor
3 To inventory management system
Level + temperature
The device software provides the following tank measurement methods:
• Direct level measurement → 26
• Hybrid tank measurement system (HTMS) → 27
• Hydrostatic tank gauging (HTG) → 28
• Hydrostatic tank shell correction (HyTD) → 30
• Thermal tank shell correction (CTSh) → 30
Direct level measurement
If no advanced tank measurement methods have been selected, level and temperature are measured
directly.
Installation example Measured variables Calculated
variables
Level None
A0023756
• Level
• Temperature (point or
average)
None
A0023757
1 Level transmitter (e.g. typically FMR540, FMR51,.. but not NMR8x or NMS8x)
2 Tankside Monitor
3 To inventory management system
4 Temperature transmitter (point or average)
26 Endress+Hauser
Tankside Monitor NRF81
2
4
D1
1
3
2
4
5 1
D3
3
HTMS measuring modes
Hybrid tank measurement system (HTMS)
HTMS uses level and pressure measurements to calculate the contents of the tank and (optionally)
the density of the medium.
Measuring mode
HTMS + P1
This mode should be used in
atmospheric (i.e. nonpressurized) tanks
HTMS + P1 + P3
This mode should be used in
non- atmospheric (i.e.
pressurized) tanks
Installation example Measured
A0023758
1 Level transmitter (e.g. typically FMR540, FMR51,.. but not NMR8x
or NMS8x)
2 Tankside Monitor
3 To inventory management system
4 Pressure transmitter (bottom)
variables
• Level
• Bottom pressure
(at position D1)
• Level
• Bottom pressure
(at position D1)
• Top pressure (at
position D3)
Calculated
variables
Density of the
medium
Density of the
medium
A0023759
1 Level transmitter (e.g. typically FMR540, FMR51,.. but not NMR8x
or NMS8x)
2 Tankside Monitor
3 To inventory management system
4 Pressure transmitter (bottom)
5 Pressure transmitter (top)
Endress+Hauser 27
HTG measuring modes
1
3
D1
2
1
3
D1
4
D3
2
Measuring mode Installation example Measured variables Calculated
HTG P1
This mode should be used in
atmospheric (i.e. non-pressurized)
tanks
HTG P1 + P3
This mode should be used in non-
atmospehric (i.e. pressurized) tanks
Tankside Monitor NRF81
Hydrostatic tank gauging (HTG)
HTG uses one, two or three pressure measurements at different positions to calculate the tank
contents and (optionally) the density of the medium.
variables
A0023760
1 Tankside Monitor
2 To inventory management system
3 Pressure transmitter (bottom)
Bottom pressure (at position D1)
The density of the medium must
be entered manually.
• Bottom pressure (at position D1)
• Top pressure (at position D3)
The density of the medium must
be entered manually.
Level
Level
A0023761
1 Tankside Monitor
2 To inventory management system
3 Pressure transmitter (bottom)
4 Pressure transmitter (top)
28 Endress+Hauser
Tankside Monitor NRF81
1
4
3
D1
D1-2
2
1
4
3
D1
D1-2
5
D3
2
Measuring mode Installation example Measured variables Calculated
HTG P1 + P2
This mode should be used in
atmospheric (i.e. non-pressurized)
tanks
HTG P1 + P2 + P3
This mode should be used in non-
atmospehric (i.e. pressurized) tanks
A0023762
1 Tankside Monitor
2 To inventory management system
3 Pressure transmitter (middle)
4 Pressure transmitter (bottom)
• Bottom pressure (at position D1)
• Middle pressure (at position D2)
• Bottom pressure (at position D1)
• Middle pressure (at position D2)
• Top pressure (at position D3)
variables
• Level
• Density of the
medium
• Level
• Density of the
medium
A0023763
1 Tankside Monitor
2 To inventory management system
3 Pressure transmitter (middle)
4 Pressure transmitter (bottom)
5 Pressure transmitter (top)
Endress+Hauser 29
Tankside Monitor NRF81
Δx
Hydrostatic tank shell correction (HyTD)
The hydrostatic tank shell correction can be used to compensate for vertical movement of the Gauge
Reference Height due to bulging of the tank shell caused by the hydrostatic pressure exerted by the
liquid stored in the tank. The compensation is based on a linear approximation obtained from
manual hand dips at several levels distributed over the full range of the tank.
A0023774
14 Movement Δx of the Gauge Reference Height due to the bulging of the tank shell caused by hydrostatic
pressure
Thermal tank shell correction (CTSh)
The thermal tank shell correction can be used to compensate for vertical movement of the Gauge
Reference Height due to temperature effects on the tank shell or stilling well. The calculation is
based on the thermal expansion coefficients of steel and on insulation factors for both the dry and
wetted part of the tank shell.
This correction is recommended for any tank gauge operating at conditions deviating
considerably from the conditions during calibration and for extremely high tanks. For
refrigerated, cryogenic and heated applications this correction is highly recommended.
30 Endress+Hauser
Tankside Monitor NRF81
56.1 (2.21)
32.5 (1.28)
319 (12.6)
361.6 (14.2)
Accessories
Device-specific accessories Weather protection cover
15 Weather protection cover; dimensions: mm (in)
Materials
Part Material
Protection cover and mounting brackets 316L (1.4404)
Screws and washers A4
• The weather protection cover can be ordered together with the device:
Ordering feature 620 "Accessory Enclosed", option PA "Weather Protection Cover")
• It can also be ordered as an accessory:
Order code: 71292751 (for NMR8x and NRF8x)
A0028479
Endress+Hauser 31
Tankside Monitor NRF81
Communication-specific accessories
Service-specific accessories
Accessory Description
WirelessHART Adapter
SWA70
Accessory Description
Commubox FXA195
HART
Accessory Description
Commubox FXA291 Connects Endress+Hauser field devices with CDI interface (= Endress+Hauser
Accessory Description
FieldCare Endress+Hauser's FDT-based Plant Asset Management tool.
Connects field devices to a WirelessHART network.
The WirelessHART adapter can be mounted directly at a HART device and is easly
integrated into an existing HART network. It ensures safe data transmission and
can be operated in parallel with other wireless networks.
For details refer to Operating Instructions BA00061S
For intrinsically safe HART communication with FieldCare via the USB interface.
For details refer to Technical Information TI00404F
Common Data Interface) to the USB interface of a computer.
For details refer to Technical Information TI00405C
Helps to configure and maintain all field devices of your plant. By supplying status
information it also supports the diagnosis of the devices.
For details refer to Operating Instructions BA00027S and BA00059S.
System components
Accessory Description
RIA15 Compact process display unit with very low voltage drop for universal use to display
4 to 20 mA/HART signals
For details refer to Technical Information TI01043K.
Tankvision
• Tank Scanner NXA820
• Data Concentrator
NXA821
• Host Link NXA822
Inventory Management System with completely integrated software for operation
via standard web browser
For details refer to Technical Information TI00419G.
32 Endress+Hauser
Tankside Monitor NRF81
Documentation
Technical Information (TI)
Brief Operating Instructions (KA)
Operating Instructions (BA)
Description of Device Parameters (GP)
The Technical Information 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.
Device Technical Information
Tankside Monitor NRF81 TI01251G
The Brief Operating Instructions contain all the essential information from incoming acceptance to
initial commissioning.
Device Brief Operating Instructions
Tankside Monitor NRF81 KA01209G
The Operating Instructions contain all the information that is required in 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.
It also contains a detailed explanation of each individual parameter in the operating menu (except
the Expert menu). The description is aimed at those who work with the device over the entire life
cycle and perform specific configurations.
Device Operating Instructions
Tankside Monitor NRF81 BA01465G
The Description of Device Parameters provides a detailed explanation of each individual parameter in
the 2nd part of the operating menu: the Expert menu. It contains all the device parameters and
allows direct access to the parameters by entering a specific code. The description is aimed at those
who work with the device over the entire life cycle and perform specific configurations.
Device Description of Device Parameters
Tankside Monitor NRF81 GP01083G (in preparation)
Endress+Hauser 33
Tankside Monitor NRF81
Safety instructions (XA)
Ordering feature 010 "Approval" Meaning XA
BA ATEX II 2 (1)G Ex db [ia Ga] IIC T6 Gb XA01531G
FD FM C/US XP-AIS Cl.I Div.1 Gr.BCD T6
AEx d[ia] IIC T6
GA EAC Ex db[ia Ga] IIC T6 Gb in preparation
IA IEC Ex db [ia Ga] IIC T6 Gb XA01531G
KA KC Ex db[ia Ga] IIC T6 Gb in preparation
MA INMETRO Ex db[ia Ga] IIC T6 Gb in preparation
NA NEPSI Ex db[ia Ga] IIC T6 Gb in preparation
TA TIIS Ex d[ia] IIC T6 Ga/Gb in preparation
XA01532G
34 Endress+Hauser
Tankside Monitor NRF81
Registered trademarks
FieldCare
Registered trademark of the Endress+Hauser Process Solutions AG, Reinach, Switzerland
MODBUS
Registered trademark of the MODBUS-IDA, Hopkinton, MA, USA
®
®
Endress+Hauser 35
*71355021*
71355021
www.addresses.endress.com
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