Endress+Hauser LT5 User manual

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Operating Instructions
Float level gauge LT5
Mechanical tank gauge for measuring liquid level
BA01264G/00/EN/06.22-00
71561893
2022-03-31

Float level gauge LT5
2 Endress+Hauser
Order code:
Ext. ord. cd.:
Ser. no.:
www.endress.com/deviceviewer Endress+Hauser
Operations App
XXXXXXXXXXXX
XXXXX-XXXXXX
XXX.XXXX.XX
Serial number
1.
3.
2.
A0023555

Float level gauge LT5 Table of contents
Endress+Hauser 3
Table of contents
1 Document information .............. 4
1.1 Document function ..................... 4
1.2 Symbols used .......................... 4
1.3 Documentation ........................ 6
2 Basic safety instructions ............ 7
2.1 Requirements for personnel ............... 7
2.2 Designated use ........................ 7
2.3 Workplace safety ....................... 7
2.4 Operational safety ...................... 8
2.5 Product safety ......................... 8
3 Product description ................. 9
3.1 Intended use .......................... 9
3.2 Technical data ......................... 9
3.3 List of material standards ................ 10
3.4 Delivery examples ..................... 11
4 Incoming acceptance and product
identification ..................... 12
4.1 Incoming acceptance ................... 12
4.2 Product identification ................... 12
4.3 Manufacturer contact address ............ 12
4.4 Storage and transport .................. 13
5 Installation ....................... 14
5.1 Dimensions of LT5 ..................... 14
5.2 Installation preparation ................. 21
5.3 Tools ............................... 22
5.4 Welding a gauge supporter .............. 23
5.5 Guide pipes .......................... 25
5.6 Top anchor and anchor hook ............. 27
5.7 Measuring tape and wire lengths .......... 28
5.8 Sealing for wetting liquid and gas parts ..... 31
5.9 Material certificates .................... 32
5.10 Installation reference diagram and order
codes ............................... 33
5.11 Mounting guide wires .................. 53
5.12 Mounting the measuring tape and measuring
wire ............................... 55
5.13 Liquid sealant for the seal pot ............ 64
6 Commissioning .................... 67
6.1 Dial display .......................... 67
6.2 Counter display ....................... 68
6.3 Indicator calibration .................... 69
6.4 Handling the gauge in water leak/
airtightness tests and at gauge startup ...... 75
7 Operation ......................... 76
7.1 Using a check handle ................... 76
7.2 Using a hoist handle ................... 76
8 Diagnostics and troubleshooting ... 79
8.1 General troubleshooting ................. 79
9 Maintenance ...................... 80
9.1 Maintenance work ..................... 80
9.2 Periodical inspection ................... 81
9.3 Replacement of o-rings for transmitters
(LT5-4/LT5-6) ....................... 82
9.4 Replacement of the check handle unit
(LT5-4/LT5-6) ....................... 83
10 Repair ............................ 85
10.1 General information on repairs ............ 85
10.2 Spare parts .......................... 85
10.3 Endress+Hauser services ................ 85
10.4 Return .............................. 86
10.5 Disposal ............................ 86
11 Accessories ....................... 87
11.1 Hoist handle ......................... 87
11.2 Seal pot ............................. 88
11.3 Gauge supporter ...................... 89
11.4 Guide pipes .......................... 91
11.5 Mounting / enclosed accessories .......... 92
11.6 Anchor weight ........................ 93
11.7 Wire guide metal, wire guide socket ........ 94
Index .................................. 95

Document information Float level gauge LT5
4 Endress+Hauser
1 Document information
1.1 Document function
These 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.
1.2 Symbols used
1.2.1 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.
1.2.2 Electrical symbols
Alternating current
Direct current and alternating current
Direct current
Ground connection
A grounded terminal which, as far as the operator is concerned, is grounded via a
grounding system.
Protective earth (PE)
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: protective earth is connected to the mains supply.
• Exterior ground terminal: device is connected to the plant grounding system.
1.2.3 Tool symbols
Phillips head screwdriver

Float level gauge LT5 Document information
Endress+Hauser 5
Flat blade screwdriver
Torx screwdriver
Allen key
Open-ended wrench
1.2.4 Symbols for certain types of information and graphics
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 graphic
Notice or individual step to be observed
1.
,
2.
,
3.
Series of steps
Result of a step
Visual inspection
Operation via operating tool
Write-protected parameter
1, 2, 3, ...
Item numbers
A, B, C, ...
Views
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

Document information Float level gauge LT5
6 Endress+Hauser
1.3 Documentation
The following documents can be found in the Download area of our website
(www.endress.com/downloads).
For an overview of the scope of the associated Technical Documentation, refer to the
following:
W@M Device Viewer (www.endress.com/deviceviewer): Enter the serial number from
nameplate
1.3.1 Technical Information (TI)
Planning aid
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.
1.3.2 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.
1.3.3 Operating Instructions (BA)
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.
1.3.4 Safety Instructions (XA)
Depending on the approval, the following Safety Instructions (XA) are supplied with the
device. They are an integral part of the Operating Instructions.
The nameplate indicates the Safety Instructions (XA) that are relevant to the device.

Float level gauge LT5 Basic safety instructions
Endress+Hauser 7
2 Basic safety instructions
2.1 Requirements for personnel
The personnel for installation, commissioning, diagnostics and maintenance must fulfill
the following requirements:
‣Be specialists who are trained and have a relevant qualification for this specific
function and task.
‣Be authorized by the plant owner-operator.
‣Be familiar with local/national regulations.
‣Before starting work, read and understand the instructions in the Operating
Instructions 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:
‣Be instructed and authorized according to the requirements of the task by the facility's
owner-operator.
‣Follow the instructions in this manual.
2.2 Designated use
Application and measured materials
Depending on the version ordered, the device can also be used with potentially explosive,
flammable, poisonous or oxidizing materials.
Devices that are used in hazardous areas have corresponding labels on their nameplates.
To ensure that the device remains in proper condition for the operation time:
‣Only use the device in full compliance with the data on the nameplate and the general
conditions listed in the Operating Instructions and supplementary documentation.
‣Check the nameplate to verify if the device can be put to its intended use in hazardous
areas.
‣If the device is not operated at an atmospheric temperature, compliance with the
relevant basic conditions specified in the relevant device documentation is absolutely
essential.
‣Protect the device permanently against corrosion from environmental influences.
‣Observe the limit values in the "Technical Information".
The manufacturer is not liable for damage caused by improper or non-designated use.
2.3 Workplace safety
For work on and with the device:
‣Wear the required personal protective equipment according to local/national
regulations.

Basic safety instructions Float level gauge LT5
8 Endress+Hauser
2.4 Operational safety
Risk of injury!
‣Operate the device in proper technical conditions and fail-safe conditions only.
‣The plant owner-operator is responsible for interference-free operation of the device.
Modifications to the device
Unauthorized modifications to the device are not permitted and can lead to unforeseeable
dangers:
‣If modifications are nevertheless required, contact your Endress+Hauser Sales Center.
Repair
To ensure continued operational safety and reliability:
‣Carry out repairs on the device only if they are expressly permitted.
‣Observe local/national regulations pertaining to repair of an electrical device.
‣Use only original spare parts and accessories from Endress+Hauser.
Ex-area
Observe the following notes to eliminate the risk of danger to persons or the facility when
the device is used in Ex-areas (e.g. explosion protection, pressure equipment safety):
‣Check the model nameplate to ensure that the ordered device is explosion proof.
‣Observe the specifications in the separate supplementary documentation attached to
these Instructions.
2.5 Product safety
This device was designed in accordance with GEP (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 the general safety standards and legal requirements.

Float level gauge LT5 Product description
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3 Product description
3.1 Intended use
Float level gauge LT5 is an important measuring instrument in the process industry. The
structure does not require a power source and it is easy to install. Since it can be used for
high-precision liquid level measurement and remote indication detection, it is ideal for the
following operations:
• Inventory management
• Batch processing
• Process tank control
• Safe tank operation
3.2 Technical data
Items Description
Measurement range 0 to 2.5, 5, 10, 16, 20, 30 m, 0 to 60 ft, 100 ft
Accuracy φ400 mm (15.75 in)
float
±2 mm (0.08 in)
(when the measured liquid's density is 1 g/cm3 and the measurement
range is 10 m (32.8 ft))
φ140 mm (5.51 in)
float
± 30 mm (1.18 in)
(when the measured liquid's density is 1 g/cm3 and the measurement
range is 10 m (32.8 ft))
Maximum operating pressure LT5-1 0 to 0.1961 bar/0.01961 MPa/2.84 psi
LT5-4 0 to 0.9807 bar/0.09807 MPa/14.22 psi
LT5-6 0 to 24.5 bar/2.45 MPa/355.25 psi
Operating temperature limits LT5-1 Wetted parts: –200 to 200 °C (–328 to 392 °F)
Gauge head: –20 to 70 °C (–4 to 158 °F)
LT5-4/LT5-6 Wetted parts: –45 to 80 (–49 to 176)
Gauge head: –20 to 70 °C (–4 to 157 °F)
Display LT5 Two-pointer dial type or counter type (minimum readable scale: 1 mm)
Only the counter type is available for 30 m and 100 ft
Gauge head connection LT5-1
(threaded, low-pressure type)
Rp 1-1/2, w/o union nut, thread JIS B0203
Rc 1-1/2, union nut, SUS316, thread JIS B0203
NPT 1-1/2, union nut, SUS316, thread ANSI
LT5-1
(flange, low-pressure type)
Flange spec./material
10K 40A RF, aluminum (AC4A), flange JIS B2220
10K 40A RF, SUS316, flange JIS B2220
NPS 1-1/2" Cl.150 RF, aluminum (AC4A) flange ASME B16.5
NPS 1-1/2" Cl.150 RF, SUS316 flange ASME B16.5
40A 150 lbs RF, aluminum (AC4A), flange JPI 7S-15
40A 150 lbs RF, SUS316, flange JPI 7S-15
LT5-4
(flange, medium-pressure
type)
Flange spec. / gauge material
10K 40A RF, aluminum (AC4CT6), flange JIS B2220
NPS 1-1/2" Cl.150 RF, aluminum (AC4CT6) flange ASME B16.5
40A 150 lbs RF, aluminum (AC4CT6), flange JPI 7S-15
LT5-6
(flange, high-pressure type)
Flange spec. / gauge
material /
bolt material
10K 40A RF, iron, flange JIS B2220
NPS 1-1/2" Cl.150 RF, iron flange ASME B16.5
40A 150 lbs RF, iron, flange JPI 7S-15
20K 40A RF, iron, flange JIS B2220
NPS 1-1/2" Cl.300 RF, iron flange ASME B16.5
40A 300 lbs RF, iron, flange JPI 7S-15
Float φ400 Low-pressure
type
Weight: 4.2 kg ρ: Liquid density (g/cm3): 0.5 ≤ ρ < 0.65

Product description Float level gauge LT5
10 Endress+Hauser
Items Description
Low-pressure
type
Weight: 5.0 kg ρ: Liquid density (g/cm3): 0.65 ≤ ρ < 1.05
Low-pressure
type
Weight: 8.0 kg ρ: Liquid density (g/cm3): 1.05 ≤ ρ < 2.0
High-pressure
type
Weight: 8.3 kg ρ: Liquid density (g/cm3): 0.5 ≤ ρ < 0.7
Float φ140 Low-pressure
type
Weight: 2.1 kg ρ: Liquid density (g/cm3): 0.5 ≤ ρ < 0.94
Low-pressure
type
Weight: 2.4 kg ρ: Liquid density (g/cm3): 0.94 ≤ ρ < 2.0
Display coupling
(coupling between the internal parts of
the gauge head and the display)
LT5-1
(threaded, low-pressure type)
Coupling: Penetration shaft
LT5-4
(flange, medium-pressure
type)
Coupling: Pressure bulkhead magnet coupling
LT5-6
(flange, high-pressure type)
Coupling: Pressure bulkhead magnet coupling
Total weight LT5-1 Threaded/flange,
low-pressure type
Approx. 8 kg
LT5-4 Flange, medium-pressure type Approx. 22 kg
LT5-6 Flange, high-pressure type Approx. 100 kg
Painting color Gauge head E+H Blue
Other parts Silver
For the low-pressure type, select SUS316 or PVC as the material.
3.3 List of material standards
Aluminum
Code Description
ADC12 Aluminum alloy die casting (SI-Si-Cu)
AC4CT6 Aluminum alloy casting (Si7Mg)
AC4A Aluminum alloy casting (Si10Mg)
Stainless steel
Code Description
SUS304 Stainless steel (18Cr-8Ni)
SUS316 Stainless steel (18Cr-12Ni-2.5Mo)
SCS13 Stainless cast steel equivalent to SUS304
SCS14 Stainless cast steel equivalent to SUS316
Other
Code Description
SGP (white pipe) Carbon steel pipe
PVC Polyvinyl chloride