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Endress+Hauser LT5 Operating Instructions Manual
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Endress+Hauser LT5 Operating Instructions Manual

Endress+Hauser LT5 Operating Instructions Manual

Float level gauge
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BA01264G/00/EN/07.24-00
71672944
2024-09-30
Products
Operating Instructions
Float level gauge LT5
Mechanical tank gauge for measuring liquid level
Solutions
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Summary of Contents for Endress+Hauser LT5

  • Page 1 Products Solutions Services BA01264G/00/EN/07.24-00 71672944 2024-09-30 Operating Instructions Float level gauge LT5 Mechanical tank gauge for measuring liquid level...
  • Page 2 Float level gauge LT5 Order code: XXXXX-XXXXXX Ser. no.: XXXXXXXXXXXX Ext. ord. cd.: XXX.XXXX.XX Serial number www.endress.com/deviceviewer Endress+Hauser Operations App A0023555 Endress+Hauser...
  • Page 3 11.4 Mounting and enclosed accessories ..Dimensions of LT5 ..... 15 11.5 Anchor weight ......91 Preparing for installation .
  • Page 4 Document information Float level gauge LT5 Document information 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.
  • Page 5 Float level gauge LT5 Document information 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...
  • Page 6 Document information Float level gauge LT5 Documentation The following documentation types are available in the Downloads area of the Endress +Hauser 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 on the nameplate.
  • Page 7 Float level gauge LT5 Safety-related basic instructions Safety-related basic instructions Basic safety instructions 2.1.1 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.
  • Page 8 This measuring system meets the legal requirements of the applicable EU Directive. These are listed in the corresponding EU Declaration of Conformity along with the standards applied. Endress+Hauser affixes the CE mark to this equipment as a sign of guarantee that this equipment has successfully passed testing. Endress+Hauser...
  • Page 9 Product description Intended use Float level gauge LT5 is an important measuring instrument in the process industry. With its mechanical construction that does not require a power supply, 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: •...
  • Page 10 Gauge head E+H Blue Other components Silver For the low-pressure type, PVC can be selected as a material for certain parts, such as the float. For more information, contact your Endress+Hauser Sales Center or distributor. List of material specifications Aluminum Code...
  • Page 11 Float level gauge LT5 Product description Others Code Description SCPL1 Cast carbon steel SGP (white gas pipe) Carbon steel pipe Polyvinyl chloride Endress+Hauser...
  • Page 12 Product description Float level gauge LT5 Delivery examples Packing method will vary depending on the order code, etc. For the flange type, sheave elbows will be packed in a separate box. A0039945  1 Packing Gauge supporter Anchor hook Sheave elbow...
  • Page 13 • Do the nameplate data match the ordering information on the delivery note? • If required (see nameplate): Are the Safety Instructions (XA) enclosed? If one or more of these conditions are not satisfied, contact your Endress+Hauser Sales Center or distributor.
  • Page 14 Incoming acceptance and product identification Float level gauge LT5 Manufacturer address Endress+Hauser Yamanashi Co., Ltd. 406-0846 862-1 Mitsukunugi, Sakaigawa-cho, Fuefuki-shi, Yamanashi Storage and transport 4.4.1 Storage conditions • Storage temperature: –20 to +70 °C (–4 to 158 °F) • Store the device in its original packaging.
  • Page 15 4-M10 Ø140 (5.51) Ø400 (15.74) A0041186  3 LT5-1 / float dimensions. Unit of measurement mm (in) Gauge head (ADC12) Float φ140 (SUS316) Float φ400 (SUS316) Float φ140 (PVC) Float φ400 (PVC) Union nut (select from JIS Rc 1-1/2 /ANSI NPT 1-1/2; select Rp 1-1/2 if there is no union nut)
  • Page 16 Installation Float level gauge LT5 (0.43) 32 (1.26) 90 (3.54) Ø52 (2.05) Ø42.7 (1.68) A0041188  4 Accessory 1. Unit of measurement mm (in) Gauge supporter (select from iron (SCPL1) / SUS304) Top anchor (ADC6) Top anchor (SUS316 with socket welding)
  • Page 17 4-M10 Ø140 (5.51) Ø400 (15.74) A0041187  6 Dimensions of LT5-1. Unit of measurement mm (in) Gauge head (ADC12) Float φ140 (SUS316) Float φ400 (SUS316) Float φ140 (PVC) Float φ400 (PVC) Flange (select from JIS 10K 40A RF / ASME NPS 1-1/2" Cl.150 RF / JPI 40A 150 lbs RF) (0.43)
  • Page 18 Installation Float level gauge LT5 300 (11.81) 330 (12.99) (3.15) 140 (5.51) Ø13 (3.15) (0.51) 4.5/4 (0.18/0.16) 40 (1.57) 32 (1.26) (5.51) Ø20 (0.79) 4 (0.16) 32 (1.26) 40 (1.57) A0041192  8 Accessory 2. Unit of measurement mm (in) Seal pot (select from aluminum + iron (SCPL1) / SCS14+SUS316;...
  • Page 19 90 (3.54) (0.18/0.16) 40 (1.57) 32 (1.26) A0041193  9 Dimensions of LT5-4. Unit of measurement mm (in) Gauge head (AC4C-T6) Gate valve (SCS13) Top anchor (AC4C-T6) Float φ400 (SUS316) 135 ° sheave elbow (AC4C-T6) 90 ° sheave elbow (AC4C-T6)
  • Page 20 Installation Float level gauge LT5 Anchor hook (select from iron (SCPL1) / SUS316) Gauge supporter (select from iron (SCPL1) / SUS304) Flange (select from JIS 10K 40A RF / ASME NPS 1-1/2" Cl.150 RF / JPI 40A 150 lbs RF)
  • Page 21 (0.18/0.16) 40 (1.57) 32 (1.26) A0041194  10 Dimensions of LT5-6. Unit of measurement mm (in) Gauge head (iron (SCPL1)) Gate valve (SCS13) Top anchor (select from iron (SCPL1) / SUS316) Float φ400 (SUS316) 135 ° sheave elbow (iron (SCPL1)) 90 °...
  • Page 22 Installation Float level gauge LT5 Preparing for installation Follow the instructions below when installing LT. • Select where to install the gauge head based on where it is the easiest to read the meter. • The float must be installed so that it is positioned near the tank sidewall.
  • Page 23 Float level gauge LT5 Installation Tools Have the following tools ready to install LT5. Items to prepare LT5-1 LT5-1 Tools Intended use LT5-4 LT5-6 (screw-in) (flange) 13 mm: For sheave elbow cover ● ● ● 24 mm: For sheave elbow cover ●...
  • Page 24 Refer to the diagram below when welding a gauge supporter. Note that pipe supporters are not supplied. The distance from the outer tank wall to the gauge head center is 15 mm (0.59 in) longer for LT5-6 (high-pressure gauge head) compared to LT5-1 (low-pressure gauge head) and LT5-4 (medium-pressure gauge head). 250 (9.84) 25 (0.98)
  • Page 25 Float level gauge LT5 Installation 265 (10.43) 25 (0.98) 50 (1.97) (3.54) 20 (0.79) 30 (1.18) R9 (0.35) 175 (6.89) A0041180  22 Gauge supporter (for high pressure). Unit of measurement mm (in) Pipe supporter (not supplied) Center line for installation Gauge supporter (depending on the selected option, SS400: t = 4.0 / SUS304: t = 4.0) with mounting bolts...
  • Page 26 • Sheave elbow to tank roof Precautions regarding installation • Guide pipes and pipe supporters are not supplied by Endress+Hauser. • Keep the bend in guide pipe to 5 mm (0.17 in) or less. • The space between two sheave elbows (piping distance) must not exceed 2.5 m (8.2 ft).
  • Page 27 Float level gauge LT5 Installation 5.5.2 Guide pipe connection • Use PTFE sealing tape and gaskets on the unions and flanges in order to maintain airtightness against gas and rain. • Ensure that the connection between the guide pipe and the union is secure to prevent rain water from seeping into the gauge.
  • Page 28 Installation Float level gauge LT5 Top anchor and anchor hook When installing an anchor hook, lower the anchor hook so that it is perpendicular to the top anchor on top of the tank and use a plumb bob to determine its accurate position.
  • Page 29 Float level gauge LT5 Installation Measuring tape and wire lengths For piping purposes, measuring tapes and wires are made slightly longer than their actual measurable lengths. The lengths of measuring tapes and wires will vary depending on the option. The tables below show actual lengths for 060 specification options for each 070 specification option.
  • Page 30 Installation Float level gauge LT5 060 measurement Length (total Perforated Non- Spare parts range length) tape perforated (measurement tape length) 60 ft 167.31 ft 69.89 ft 98.42 ft Contact Endress+Hauser 100 ft 249.33 ft 108.26 ft 141.07 ft Contact Endress+Hauser 4.
  • Page 31 Float level gauge LT5 Installation A0041195  27 Measuring tape and wire (example: option 1 for specification 070 and option 5 for specification 060) Perforated tape Non-perforated tape / wire In the diagram above, the maximum measurement distance is 22 mm and the maximum excess is 23 m.
  • Page 32 Installation Float level gauge LT5 Sealing materials for wetting liquid and gas parts 5.8.1 List of materials Product Component name Sealing material application site Sealing material type Packing/O-ring materials name LT5-1 Gauge head Rear cover Cover packing V#6502 Check shaft...
  • Page 33 Float level gauge LT5 Installation Material certificates When material certificates are required, order them when ordering the products. Certificates can be provided for the following parts: • High-pressure specification gauge head made of iron (the certificate for the flange is the...
  • Page 34 Installation Float level gauge LT5 5.10 Reference diagrams and order codes for installation 5.10.1 For cone roof tanks (CRT) 950 (37.4) (8.66) (8.66) (9.84) Ø400 (15.74) (17.32) A0041196  28 Mounting on a cone roof tank. Unit of measurement mm (in)
  • Page 35 Float level gauge LT5 Installation Example of target order code (LT5-111A031B11A111200000+PA) Item Target Code Specification ntity Gauge head 0.01961 MPa/2.84 psi, aluminum (ADC12) Gauge head process connection Rc 1-1/2, union nut, SUS316, screw JIS B0203 Display; cover Dial display: acrylic...
  • Page 36 Installation Float level gauge LT5 5.10.2 Tank top mounting (for underground tank) 153 (6.02) (17.32) A0041197  29 Mounting on underground tank. Unit of measurement mm (in) Anchor hook Top anchor Measuring tape Float Guide wire Wetted part (welded to the tank)
  • Page 37 Float level gauge LT5 Installation Example of target order code (LT5-111C022B11A100000000) Item Target Code Specification ntity Gauge head 0.01961 MPa/2.84 psi, aluminum (ADC12) Gauge head process connection Rc 1-1/2, union nut, SUS316, screw JIS B0203 Display; cover Reverse mounting, dial display, acrylic...
  • Page 38 Installation Float level gauge LT5 5.10.3 Cone roof tank (with seal pot for CRT) 950 (37.4) (8.66) (8.66) 250 (9.84) Ø400 (15.74) (17.32) A0041198  30 Mounting seal pot for CRT. Unit of measurement mm (in) Anchor hook Top anchor...
  • Page 39 Float level gauge LT5 Installation Example of target order code (LT5-11AA023B1BA21A1000F0+PA) Item Target Code Specification ntity Gauge head 0.01961 MPa/2.84 psi, aluminum (ADC12) Gauge head process connection 10K 40A RF, aluminum (AC4A), flange JIS B2220 Display; cover Dial display: acrylic...
  • Page 40 Installation Float level gauge LT5 5.10.4 Cone roof tank (with PVC seal pot for CRT) 950 (37.4) (8.66) (8.66) 250 (9.84) Ø400 (15.74) (17.32) (1.57) (0.28) Ø6 (0.24) A0041199  31 Mounting PVC seal pot for CRT. Unit of measurement mm (in)
  • Page 41 Float level gauge LT5 Installation Example of target order code (LT5-11AA025H1NC41A1000N0+PA) Item Target Code Specification ntity Gauge head 0.01961 MPa/2.84 psi, aluminum (ADC12) Gauge head process connection 10K 40A RF, aluminum (AC4A), flange JIS B2220 Display; cover Dial display: acrylic...
  • Page 42 Installation Float level gauge LT5 5.10.5 Compact cone roof tank (guide pipe type) 950 (37.4) Ø140 (5.51) A0041200  32 Mounting on a compact cone roof tank. Unit of measurement mm (in) Vent hole Measuring tape Guide pipe (stilling well) Float 90 °...
  • Page 43 Float level gauge LT5 Installation Example of target order code (LT5-111A021L000011200000+PA) Item Target Code Specification ntity Gauge head 0.01961 MPa/2.84 psi, aluminum (ADC12) Gauge head process connection Rc 1-1/2, union nut, SUS316, screw JIS B0203 Display; cover Dial display: acrylic...
  • Page 44 Installation Float level gauge LT5 5.10.6 Tank top mounting (guide pipe type) Ø140 (5.51) A0041201  33 Mounting on tank top, unit. Unit of measurement mm (in) Gauge head Gauge supporter Vent hole Measuring tape Guide pipe (stilling well) Float...
  • Page 45 Float level gauge LT5 Installation Example of target order code (LT5-111C022L000000000000+PA) Item Target Code Specification ntity Gauge head 0.01961 MPa/2.84 psi, aluminum (ADC12) Gauge head process connection Rc 1-1/2, union nut, SUS316, screw JIS B0203 Display; cover Reverse mounting, dial display, acrylic...
  • Page 46 Installation Float level gauge LT5 5.10.7 Gas holder Ø6 (0.24) (0.2) (9.84) A0041202  34 Mounting a gas holder. Unit of measurement mm (in) Gas holder wire hook Triangle bracket for measuring wire Wire guide socket 90 ° sheave elbow...
  • Page 47 Float level gauge LT5 Installation Example of target order code (LT5-111A0340000011200000+PAPFPH) Item Target Code Specification ntity Gauge head 0.01961 MPa/2.84 psi, aluminum (ADC12) Gauge head process connection Rc 1-1/2, union nut, SUS316, screw JIS B0203 Display; cover Dial display: acrylic...
  • Page 48 Installation Float level gauge LT5 5.10.8 For floating roof (FRT) 950 (37.4) Ø70 PCD.44 (2.76) (9.84) Ø10 (0.39) Ø400 (15.74) (17.32) >520 (20.47) A0041203  35 Mounting on a floating roof tank. Unit of measurement mm (in) Wire guide metal...
  • Page 49 Float level gauge LT5 Installation Target order code (LT5-111A054E000011200000+PAPEPF) Item Target Code Specification ntity Gauge head 0.01961 MPa/2.84 psi, aluminum (ADC12) Gauge head process connection Rc 1-1/2, union nut, SUS316, screw JIS B0203 Display; cover Dial display: acrylic Crank unit...
  • Page 50 Installation Float level gauge LT5 5.10.9 Dome roof tank for medium pressure 950 (37.4) (8.66) (8.66) (9.84) Ø400 (15.74) (17.32) A0041204  36 Mounting on a dome roof tank for medium pressure. Unit of measurement mm (in) Anchor hook Top anchor...
  • Page 51 Float level gauge LT5 Installation Example of target order code (LT5-44AB151R4AA24A200001+PA) Item Target Code Specification ntity Gauge head 0.09807 MPa/14.22 psi, aluminum (AC4C-T6) Gauge head process connection 10K 40A RF, aluminum (AC4C-T6), flange JIS B2220 Display; cover Dial display; glass + iron (SCPL1)
  • Page 52 Installation Float level gauge LT5 5.10.10 Spherical tank for high pressure (8.66) (8.66) Ø400 (10.43) (15.74) (17.32) A0041205  37 Mounting on a spherical tank for high pressure. Unit of measurement mm (in) Anchor hook Top anchor Float Guide wire...
  • Page 53 Float level gauge LT5 Installation Example of target order code (LT5-66GB153R6GA26G16G204+PC) Item Target Code Specification ntity Gauge head 2.45 MPa/355.25 psi, iron (SCPL1) Gauge head process connection 20K 40A RF, iron (SCPL1), flange JIS B2220 Display; cover Dial display; glass + iron (SCPL1)
  • Page 54 Installation Float level gauge LT5 5.11 Mounting guide wires Mounting procedure • Do not bend the guide wires. • Pull one of the two guide wires vertically while pulling the other guide wire horizontally. • Use two packings with a washer in between for the space between the top anchor and the mounting flange on the tank side.
  • Page 55 Float level gauge LT5 Installation 7. Tighten nut [3] and fully release the spring.  A0041207  39 Mounting guide wires 2. Unit of measurement mm (in) Nut 1 Nut 2 Nut 3 This completes the installation procedure. Endress+Hauser...
  • Page 56 Installation Float level gauge LT5 5.12 Mounting measuring tape and measuring wire • Never bend or damage the measuring tape. • Ensure that the measuring tape does not become twisted inside the tank or while the pipes are being laid out.
  • Page 57 Float level gauge LT5 Installation 5.12.1 For cone roof tank Mounting procedure 1. Feed one end of the measuring tape (non-perforated side) into the tank from the sheave elbow on the tank roof. 2. Pass the other end of the tape (perforated, looped side) through the sheave elbow on the gauge head and insert it into the gauge head.
  • Page 58 Installation Float level gauge LT5 5.12.2 Measuring tape and float connection procedure 1. Bend the measuring tape at a length of 65 mm (2.56 in). 2. Bend the measuring tape again at a length of 65 mm (2.56 in). 3. Bend the measuring tape, which has been folded twice, at the center.
  • Page 59 Float level gauge LT5 Installation 5.12.3 For floating roof tank Mounting procedure 1. Insert one end of the measuring wire into the tank from the 90° sheave elbow on the gauge head through the sheave elbow on the tank roof.
  • Page 60 Installation Float level gauge LT5 5.12.4 For medium/high pressure tank • Never bend or damage the measuring tape. • Ensure that the measuring tape does not become twisted inside the tank or while the pipes are being laid out. • Approximately half of the measuring tape is perforated with small holes at 20 mm (1 in) intervals.
  • Page 61 Float level gauge LT5 Installation A0041212  45 Gland fixing tool Before tightening After tightening O-ring Gland Gland fixing tool A0041213  46 LT components Measuring tape Sprocket Tape drum Tape set screw Lock screw Tape guide Dust cover Endress+Hauser...
  • Page 62 Installation Float level gauge LT5 A0041214  47 Mounting the measuring tape Guide wire Measuring tape Once the measuring tape has been connected to the gauge head, cut it off, leaving approximately 1.5 m (4.92 ft) from the connection to the float.
  • Page 63 Float level gauge LT5 Installation 5.12.5 Internal parts adjustment Tape guide adjustment procedure 1. Turn the tape drum inside the gauge head in the direction of the arrow in the diagram below to make the measuring tape taut.  A0041215 ...
  • Page 64 5. Close the gauge head cover. 6. For LT5-4/LT5-6, close the gland of the cover. This completes the conster mounting procedure. Tank height (measuring span) - Actual liquid level Number of turns = 0.6 (unit: m)
  • Page 65 Float level gauge LT5 Installation 5.13 Liquid sealant for seal pot 5.13.1 Filling seal pot with liquid sealant (when installing a new gauge) Liquid sealant filling procedure 1. Install the entire LT unit, including the seal pot and float.  Depending on the selected order code, parts may be different from those shown in the diagram below.
  • Page 66 Installation Float level gauge LT5 3. After checking the operation of LT, remove the cover of the 90° sheave elbow for the seal pot and inject the liquid sealant.  Note that checking the operation of LT after filling it with liquid sealant may cause the liquid sealant to leak through the measuring tape.
  • Page 67 Float level gauge LT5 Installation 5.13.2 Filling seal pot with liquid sealant (for an existing gauge) Liquid sealant filling procedure CAUTION Used liquid sealant may have turned into a hazardous substance as a result of mixing with the liquid inside the tank.
  • Page 68 Commissioning Float level gauge LT5 Commissioning Dial display Pointer setting and scale reading procedure When calibrating (pointer setting) to a value that has been determined as a calculated value or a measured value, the calibration procedure will be different for a dial display and a counter display.
  • Page 69 Float level gauge LT5 Commissioning Counter display Counter display procedure • The scale plate (1 mm (0.04 in) increments) can rotate freely. • On the counter drum, the number on the No. 1 drum changes each time the scale plate makes one full rotation (100 mm (3.94 in)).
  • Page 70 Commissioning Float level gauge LT5 Indicator adjustment There are three ways to adjust the indicator on a liquid level gauge as described below, but operation of the indicator unit is handled using the same procedure. • Fill the tank with actual liquid and calibrate the indicator based on the measured value •...
  • Page 71 Float level gauge LT5 Commissioning If a float is being installed to a spherical tank away from the tank center line, add Lx, which can be determined from the following equation, to Lf in 2 above. Correction amount for level indication for deviation D²...
  • Page 72 Ø400 (15.74) Ø400 (15.74) A0041238  59 Graph of LT5-1 φ400 mm (15.75 in) float: Density of measurement liquid ρ (g/cm3). Measurement unit mm (in) Draft surface at density ρ Water (draft surface at a density of 1.0 g (0.002 lb)/cm Equation: SUS316 φ140 mm (5.51 in), 2 100 g (4.63 lb) float...
  • Page 73 Float level gauge LT5 Commissioning 　 　 Ø140 (5.51) Ø140 (5.51) A0041241  60 Indicator value when the tank is filled with water. Measurement unit mm (in) Draft surface at density ρ Water (draft surface at a density of 1.0 g (0.002 lb)/cm Equation: SUS316 φ400 mm (15.75 in), 8 300 g (18.30 lb) float...
  • Page 74 Ø400 (15.74) Ø400 (15.74) A0041243  61 Graph of LT5-4/LT5-6 φ400 mm (15.75 in) float: Density of measurement liquid ρ (g/cm Measurement unit mm (in) Draft surface at density ρ Water (draft surface at a density of 1.0 g (0.002 lb)/cm...
  • Page 75 Float level gauge LT5 Commissioning Precautions for water-filling and airtightness tests and handling of gauge at startup In high-pressure tanks, such as liquid gas tanks, damage to the measuring tape and other such accidents have a significant impact on the operation of the tank, and the recovery cost can be extensive.
  • Page 76 Operation Float level gauge LT5 Operation Check handle (standard) A check handle is used to confirm that LT is operating properly. • When checking the operation using a check handle, make sure that the tank has been filled with liquid first.
  • Page 77 4. Remove the handle when it is not being used after the float has been lowered. This completes the lowering procedure. 210 (8.28) 50 (1.97) 10 (0.39) A0041245  64 Handling a hoist handle ( LT5-1). Unit of measurement mm (in) Wing bolt 1 Stopper Wing bolt 2 Knob Puller Handle...
  • Page 78 Float level gauge LT5 7.2.2 Handling a hoist handle (for LT5-4/LT5-6) • Do not let go of the handle when hoisting or lowering the float. Letting go of the hoist handle may cause the float to fall and damage LT. When letting go of the handle during the operation, lock the hoist handle.
  • Page 79 The spring in the check unit has deteriorated Replace the spring Check handle does not work (LT5-4/LT5-6) The check handle set screw is loose Tighten the set screw Broken check driver spring Replace the entire check unit...
  • Page 80 Maintenance Float level gauge LT5 Maintenance Maintenance work 9.1.1 Before performing maintenance • Let tanks rest sufficiently before performing maintenance, especially tanks for flammable liquids (refer to the table below). • When working on a flammable liquid tank, wear anti-static clothing, safety footwear, and gloves.
  • Page 81 Float level gauge LT5 Maintenance Periodic inspection Perform periodic inspection according to the procedures in the table below. Product/component Inspection item Inspection method Gauge head Corrosion check and cleaning of tape protective Open the rear cover of the gauge head and check the state of rust...
  • Page 82 Maintenance Float level gauge LT5 Replacement of O-ring for transmitter (LT5-4/LT5-6) If gas begins leaking from the main unit side, sealing O-rings must be replaced. The following procedure must be performed carefully due to the tank being under pressure from within.
  • Page 83 Float level gauge LT5 Maintenance Replacement of the check handle unit (LT5-4/LT5-6) The check handle unit is an important mechanism for checking the LT' s operation status, and it is prone to wear and tear as it is used frequently. It is designed so that each part can be replaced easily if it becomes worn.
  • Page 84 Maintenance Float level gauge LT5 A0041249  68 Check handle unit Gland clamp Seal metal Endress+Hauser...
  • Page 85 General information on repairs 10.1.1 Repair concept The Endress+Hauser repair concept assumes that the devices have a modular design and that repairs can be done by the Endress+Hauser Service Department or specially trained customers. Spare parts are contained in suitable kits. They also come with relevant replacement instructions.
  • Page 86 Accessories Float level gauge LT5 Accessories 11.1 Seal pot A seal pot is filled with liquid sealant to prevent vapor from escaping the tank. Liquid sealant Liquid paraffin (spindle oil): 1 150 cc Maximum sealing 400 mm H pressure Shape...
  • Page 87 A gauge supporter is used for installation on the outer tank wall. Note that pipe supporters are not supplied. The distance from the outer tank wall to the gauge head center is 15 mm (0.59 in) longer for LT5-6 (high-pressure gauge head) compared to LT5-1 (low-pressure gauge head) and LT5-4 (medium-pressure gauge head). 250 (9.84) 25 (0.98)
  • Page 88 Accessories Float level gauge LT5 265 (10.43) 25 (0.98) 50 (1.97) (3.54) 20 (0.79) 30 (1.18) R9 (0.35) 175 (6.89) A0041180  71 Gauge supporter (for high pressure). Unit of measurement mm (in) Pipe supporter (not supplied) Center line for installation Gauge supporter (depending on the selected option, SS400: t = 4.0 / SUS304: t = 4.0) with mounting bolts...
  • Page 89 • Sheave elbow to tank roof Precautions regarding installation • Guide pipes and pipe supporters are not supplied by Endress+Hauser. • Keep the bend in guide pipe to 5 mm (0.17 in) or less. • The space between two sheave elbows (piping distance) must not exceed 2.5 m (8.2 ft).
  • Page 90 This is an option for securing the tape inside so that it does not become detached. It is useful for applications in which hunting may occur with the float. It comes with LT5-4 and LT5-6 as a standard item. Dust cover...
  • Page 91 Float level gauge LT5 Accessories 11.5 Anchor weight When an anchor hook cannot be installed at the bottom of the tank (such as when there is liquid inside the tank), use an anchor weight to keep the guide wire taut.
  • Page 92 Accessories Float level gauge LT5 11.6 Wire guide metal and wire guide socket Rc1-1/2 Ø70 PCD.44 (2.76) Ø5 (0.2) Ø10 (0.39) A0041261  74 Wire guide metal and wire guide socket. Unit of measurement mm (in) Wire guide metal Wire guide socket Roof stand Ø6...
  • Page 93 Float level gauge LT5 Index Index Symbols Applications ....... . 7 Safety instructions Basic .
  • Page 96 *71672944* 71672944 www.addresses.endress.com...

This manual is also suitable for:

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