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Level Probe LGC2

Diagnostics and Troubleshooting

2017

-0

8.3

Troubleshooting Specific to HUT Temperature Head Transmitter

Error

Reason

Solution

No measuring

signal

4 to 20 mA cable not connected

correctly.

Connect device, see chapter 6.

No power supplied via the

4 to 20 mA cable.

Check current loop.

Supply voltage too low

(min. 8 V DC).

• Check supply voltage.
• Overall resistance greater than

max. load resistance.

Error current



3.6 mA



21 mA

Pt100 resistance thermometer not

connected correctly.

Connect device, see chapter 6.

4 to 20 mA cable not connected

correctly.

Connect device, see chapter 6.

Pt100 resistance thermometer

defective.

Replace the device.

Temperature head transmitter

defective.

Replace the temperature head

transmitter.

Measured value

is inaccurate/

incorrect.

Pt100 resistance thermometer in 2-

wire circuit, cable resistance was

not compensated for.

• Compensate the cable

resistance.

• Connect Pt100 resistance

thermometer as 3-wire or 4-

wire circuit.

Table 8.3

Содержание LGC2

Страница 1: ...ISO9001 Level Probe LGC2 Hydrostatic Level Measurement 4 to 20 mA Analog PROCESS AUTOMATION MANUAL...

Страница 2: ...ms of Delivery for Products and Services of the Electrical Industry published by the Central Association of the Electrical Industry Zentralverband Elektrotechnik und Elektroindustrie ZVEI e V in its m...

Страница 3: ...t Safety 14 3 Product Description 15 3 1 Function 15 4 Incoming Acceptance and Product Identification 16 4 1 Incoming Acceptance 16 4 2 Product Identification 17 4 3 Nameplates 17 4 4 Storage and Tran...

Страница 4: ...umption 31 6 5 Current Consumption 31 6 6 Maximum Load for Device 4 to 20 mA Analog 32 6 7 Connecting the Measuring Unit 33 6 8 Post connection check 34 7 Operation 35 7 1 Overview of Operation 35 8 D...

Страница 5: ...ntent 2017 02 5 12 Technical Specifications 42 12 1 Input 42 12 2 Output 43 12 3 Performance Characteristics 45 12 4 Ambient Conditions 47 12 5 Process Conditions 49 12 6 Additional Technical Specific...

Страница 6: ...actions It is mandatory that you observe these warning messages for your personal safety and in order to avoid property damage Depending on the risk level the warning messages are displayed in descend...

Страница 7: ...rminal through which alternating current or direct current flows Ground connection A grounded terminal which as far as the operator is concerned is grounded via a grounding system Protective ground co...

Страница 8: ...rred Indicates procedures processes or actions that are preferred Forbidden Indicates procedures processes or actions that are forbidden 1 2 3 Series of steps Result of a sequence of actions Visual ch...

Страница 9: ...05O These manual 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 opera...

Страница 10: ...2017 02 10 Level Probe LGC2 Important Document Information 1 4 Terms and Abbreviations Figure 1 1 URL OPL MWP LRL 0 p LRV URV 1 2 3 4...

Страница 11: ...essure of the selected components i e the process connection has to be taken into consideration in addition to the measuring cell Also observe pressure temperature dependency For the relevant standard...

Страница 12: ...5 bar 0 to 75 psi Lower range value LRV 0 bar 0 psi Upper range value URV 5 bar 75 psi TD URL URV LRV TD 10 bar 150 psi 5 bar 75 psi 0 bar 0 psi 2 In this example the TD is 2 1 This span is based on...

Страница 13: ...Intended Use 2 2 1 Application and Media The device is a hydrostatic pressure sensor for measuring the level of fresh water wastewater and salt water The temperature is measured simultaneously in the...

Страница 14: ...or the facility when the device is used in the approval related area e g explosion protection pressure vessel safety Check the nameplate to verify if the device ordered can be put to its intended use...

Страница 15: ...citance caused by the movement of the process isolating diaphragm is measured at the electrodes of the ceramic carrier The electronics unit then converts this to a signal that is proportional to the p...

Страница 16: ...he nameplates correspond to the order specifications on the delivery note Is the documentation available If required see nameplate Are the instruction manuals SI present Table 4 1 Note If one of these...

Страница 17: ...ing The meaning of the individual letters and digits is explained in the order confirmation details 2 Extended order number complete 3 Serial number for clear identification 4 TAG device tag 5 Device...

Страница 18: ...inch Figure 4 3 1 Approval symbol 2 Reference to associated documentation 3 Approval number Mat 316L 1 4435 1 4404 Al O PE EPDM PPO 2 3 For use in drinking water according to 250002737 B 1 2 3 1 Seria...

Страница 19: ...40 to 100 C 40 to 212 F 4 4 2 Transporting the Product to the Measuring Point 4 5 Scope of Delivery The scope of delivery comprises Level probe LGC2 optionally with integrated Pt100 resistance thermom...

Страница 20: ...d as an accessory 3 Bending radius of extension cable 120 mm 4 72 inch 4 Mounting clamp can be ordered as an accessory 5 Probe connection extension cable cable length 6 Guide tube 7 Level probe LGC 8...

Страница 21: ...Fuchs provides humidity and climatic protection and is suitable for installation outdoors see chapter 11 Cable length tolerance 5 m 16 foot 17 5 mm 0 69 inch 5 m 16 foot 0 2 If the cable is shortened...

Страница 22: ...ble 1 and the device into account when selecting the fastening point 2 Push up the clamping jaws 3 Place the extension cable 1 between the clamping jaws as shown in the diagram 3 Hold the extension ca...

Страница 23: ...h the clamping sleeves 4 into the adapter 5 7 Fit the cover 2 with the sealing ring 3 onto the adapter 5 and securely screw together with the adapter 1 Probe connection extension cable 2 Cover for cab...

Страница 24: ...lt in injuries Only mount the device with cable mounting screw in unpressurized containers 1 Mounting screws 2 Mounting springs 3 HUT temperature head transmitter 4 Circlips 5 Terminal box 1 3 2 6 5 4...

Страница 25: ...of screwdriver blade max 6 mm 0 24 inch Figure 5 6 Warning Property damage from wrong mounting If you tighten the mounting screws too tightly this can damage the temperature head transmitter Do not o...

Страница 26: ...thout the optional HUT temperature head transmitter a terminal block is provided with the terminal box for the purpose of wiring the Pt100 resistance thermometer Figure 5 7 5 9 Cable Marking Figure 5...

Страница 27: ...ly Ordering information product structure feature Accessories option WP 5 11 Post installation check Is the device undamaged visual inspection Does the device conform to the measuring point specificat...

Страница 28: ...s as standard see chapter 1 3 Warning Danger to life from wrong electrical connection Incorrect electrical connection of the device can compromise its function and its electrical safety The supply vol...

Страница 29: ...stance thermometer not for use in hazardous areas ordering information feature Accessories option BN a Not for the level probe with external diameter of 29 mm 1 14 inch b 10 5 to 30 V DC hazardous are...

Страница 30: ...of circuits If you connect or disconnect energized circuits in a potentially explosive atmosphere sparks can ignite the surrounding atmosphere Only connect or disconnect energized circuits in the abse...

Страница 31: ...mitter connection max 1 75 mm2 15 AWG 6 4 Power Consumption 6 4 1 Level probe and Pt100 optional 0 805 W at 35 V DC non hazardous areas 0 690 W at 30 V DC hazardous areas 6 4 2 HUT Temperature Head Tr...

Страница 32: ...e subtracted from the value calculated as shown in the equation B Load diagram for HUT temperature head transmitter for estimating the load resistance Additional resistances must be subtracted from th...

Страница 33: ...unit as shown in the graphic Figure 6 4 A Power supply display and evaluation unit with one input for Pt100 resistance thermometer B Power supply display and evaluation unit with one input for 4 to 2...

Страница 34: ...ce undamaged visual inspection Do the cables comply with the requirements Do the cables have adequate strain relief Are all cable glands installed firmly tightened and correctly sealed Does the supply...

Страница 35: ...units for the device and the HUT temperature head transmitter 7 1 Overview of Operation No display or other operation facility is required to operate the device Note Your Pepperl Fuchs service organi...

Страница 36: ...ary Output current 3 6 mA Signal line is not wired correctly Electronics unit is defective Check wiring Table 8 1 Error Reason Solution No measuring signal 4 to 20 mA cable not connected correctly Con...

Страница 37: ...than max load resistance Error current 3 6 mA or 21 mA Pt100 resistance thermometer not connected correctly Connect device see chapter 6 4 to 20 mA cable not connected correctly Connect device see ch...

Страница 38: ...tamination Check the process isolating diaphragm for buildup at suitable intervals 9 1 Exterior cleaning Please note the following points when cleaning the device The cleaning agents used should not c...

Страница 39: ...vered According to legal regulations Pepperl Fuchs as an ISO certified company is required to follow certain procedures when handling returned products that are in contact with medium To ensure swift...

Страница 40: ...minal block terminals 4 terminal block for wiring HUT temperature head transmitter for device with 4 to 20 mA Analog Temperature head transmitter for the conversion of various input signals Product st...

Страница 41: ...fers a testing adapter to easy function testing of the level probes Product structure feature Accessories option VP Testing adapter for device with outer diameter 42 mm 1 65 inch Pepperl Fuchs offers...

Страница 42: ...al Relative pressure Measuring range bar psi Lowest calibratable span 1 bar psi 1 Largest turn down that can be configured at the factory 10 1 higher turn down can be configured on request Vacuum resi...

Страница 43: ...pendent resistance value HUT temperature head transmitter optional for device with 4 to 20 mA Analog 4 to 20 mA Analog for temperature measured value 2 wire 12 2 2 Signal Range 3 8 to 20 5 mA Measurin...

Страница 44: ...from the value calculated as shown in the equation B Load diagram for HUT temperature head transmitter for estimating the load resistance Additional resistances must be subtracted from the value calcu...

Страница 45: ...Calibration temperature 23 C 73 F 5 K 12 3 2 Reference Accuracy Level probe and Pt100 optional The reference accuracy comprises the non linearity after limit point configuration hysteresis and non re...

Страница 46: ...put and the output span 0 to 30 C 32 to 86 F 0 15 0 15 x TD of set span 10 to 70 C 14 to 158 F 0 4 0 4 x TD of set span Temperature coefficient TK of the zero output and the output span 10 to 70 C 14...

Страница 47: ...40 to 85 C 40 to 185 F Temperature head transmitter 2 wire configured for a measuring range of 20 to 80 C 4 to 176 F This configuration offers a temperature range of 100 K which can be easily mapped P...

Страница 48: ...requirements of EN 61326 series For details refer to the Declaration of Conformity Maximum deviation 0 5 of span HUT temperature head transmitter optional for device with 4 to 20 mA Analog Interferenc...

Страница 49: ...be easily mapped Please note that the Pt100 resistance thermometer is suitable for a temperature range of 10 to 70 C 14 to 158 F 12 5 2 Medium Temperature Limit Level probe and Pt100 optional With ex...

Страница 50: ...function 6 Documentation 9 E Exterior cleaning 38 H Hazardous area 14 I Incoming acceptance 16 Incorrect use 13 Intended use 13 M Maintenance 38 Media 13 Modifications to the device 14 N Nameplate 17...

Страница 51: ...Level Probe LGC2 Index 2017 02 51 S Safety instructions 13 Scope of delivery 19 Spare Parts 39 Storage 18 T Transport 18 Troubleshooting 36 W Workplace safety 13...

Страница 52: ...om Worldwide Headquarters Pepperl Fuchs GmbH 68307 Mannheim Germany Tel 49 621 776 0 E mail info de pepperl fuchs com For the Pepperl Fuchs representative closest to you check www pepperl fuchs com co...

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