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Page 100 SITRANS LU01 – INSTRUCTION MANUAL 7ML19985BE02
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Troubleshooting
Measurement Difficulties
If a measurement difficulty occurs for greater than the Failsafe Timer (P070) setting, LOE
is flashed alternately with the Reading display. Under certain conditions, a measurement
difficulty may cause the SITRANS LU01 to lock on to a false echo and report a fixed or
wrong reading.
Flashing LOE Display
If LOE is displayed, ensure that the:
1. Material (object) surface monitored is within the maximum range of the transducer.
2. Transducer (P004) value matches the transducer used.
3. Transducer is located and aimed properly.
(See the Transducer manual for maximum range, mounting and rough aiming
instructions.)
For optimum performance, adjust the transducer aiming while monitoring the Echo
Confidence (P805) for various material levels over the measurement range. When
complete, set the transducer aiming at the best angle for all levels.
To display Echo Confidence in the RUN mode:
Press
and hold for 4 seconds (Failsafe Time Left changes to the Short : Long
Confidence display).
To display Echo Confidence in PROGRAM mode, access the Echo Confidence (P805)
parameter.
To update the value displayed after each aiming adjustment...
Press
(5 times or more to verify stability)
If the condition persists (despite optimum aiming), optimize transducer performance. (See
Enhancement Parameters Short Shot Frequency, P840 and Long Shot Frequency, P841).
Increase the Failsafe Timer (P070) value, if failsafe operation will not be compromised by
the larger value.
If LOE is displayed only when a sloped bottom vessel is near Empty, the echo is probably
being reflected away from the transducer. Install an empty target plate in the bottom of
the vessel. When exposed (not covered by material), the target plate provides the
reflective surface representative of an empty vessel.
Install a longer range transducer, enter the new Empty (P006) distance, and (if necessary)
optimize aiming and frequency again.
If a longer range transducer is not available, connect an oscilloscope to the SITRANS
LU01, (see Enhancement Parameters Scope Displays, P810).
- Instruction Manual May 2008 1
- Measurement 2
- Continuous 2
- Weighing Systems 2
- Table of Contents 3
- Introduction 7
- SITRANS LU01 Features 9
- Material: 10
- Response: 10
- Specifications 11
- Programmer 12
- Transducer 13
- Options 13
- Safety marking symbols 14
- Location 15
- Recommended 15
- Mounting 16
- Interconnection 17
- Installation 18
- DC Model 18
- WARNINGS: 18
- Optional SmartLinx Module 19
- Temperature Sensor 21
- Communication 22
- SmartLinx 22
- Level System Synchronization 22
- AC Supply Wiring 23
- DC Supply Wiring 23
- Communications Access 24
- Programming 25
- Description 26
- Program Mode Entry 27
- Changing Parameters 27
- Parameter Reset Features 28
- Parameters Types 28
- Programming Security 28
- Operation 29
- Key Description 30
- Performance Test Results 31
- Helpful Hints 33
- P000 Lock 34
- Quick Start (P001 to P007) 35
- P004 Transducer 36
- P005 Units 36
- P006 Empty 37
- P007 Span 37
- P050 Tank Shape 38
- Maximum Volume (P051) 38
- P051 Maximum Volume 39
- P052 Tank Dimension A 40
- P053 Tank Dimension L 40
- Universal Volume Calculation 40
- Parameters 41
- Entering a Level Breakpoint 41
- Typical volume calculations 41
- Entering a Volume Breakpoint 41
- P060 Decimal Position 42
- P061 Convert Reading 42
- P062 Offset Reading 43
- P070 Failsafe Timer 43
- P129 Relay 44
- Failsafe 44
- P071 Failsafe Material Level 44
- P072 Failsafe Level Advance 45
- P100 Preset Applications 46
- P101 High Alarm 47
- P102 Low Alarm 47
- P103 High High Alarm 47
- P104 Low Low Alarm 47
- Custom Relays (P111 to P113) 48
- Independent Relay Setpoints 49
- Setpoints Action When 50
- ON OFF Status Alarm Relay 50
- P112 Relay ON Setpoint 51
- P113 Relay OFF Setpoint 51
- P116 Dead Band 51
- P129 Relay Failsafe 52
- P200 mA Output Range 53
- P201 mA Output Function 53
- P210 0/4 mA Output Setpoint 54
- P211 20 mA Output Setpoint 54
- P212 mA Output Min Limit 54
- P213 mA Output Max Limit 55
- P214 4 mA Output Trim 55
- P215 20 mA Output Trim 55
- P219 mA Output Failsafe 56
- P330 Profile Record 57
- P331 Auto Record Enable 58
- P333 Auto Record Interval 58
- P334 Auto Record ON Setpoint 59
- P335 Auto Record OFF Setpoint 59
- P337 Auto Record LOE Time 59
- P340 Date of Manufacture 60
- P341 RUN Time 60
- P342 Start Ups 60
- P650 Offset Calibration 60
- Values Range: -999 to 9999 61
- • P653 Velocity 61
- • P654 Velocity at 20°C 61
- P652 Offset Correction 62
- P653 Velocity 62
- P654 Velocity at 20°C 62
- P660 Temp Source 63
- P661 Temp Fixed 63
- P664 Temperature 63
- Rate (P700 to P707) 64
- P702 Filling Indicator 65
- P703 Emptying Indicator 65
- P704 Rate Filter 65
- P705 Rate Update Time 66
- P706 Rate Update Distance 66
- P707 Rate Value 66
- P710 Fuzz Filter 66
- P711 Echo Lock 67
- P712 Echo Lock Sampling 67
- P713 Echo Lock Window 68
- P726 Level System Sync 68
- P727 Scan Delay 68
- Display (P730 to P733) 69
- P731 Auxiliary Reading Key 70
- P732 Display Delay 70
- P733 Scroll Access 70
- (P740 to P749) 71
- P772 Baud Rate 72
- P790 Hardware Error 72
- P791 Bus Error 73
- P792 Bus Error Count 73
- P794 SmartLinx Module Type 73
- P795 SmartLinx Protocol 73
- P800 Near Blanking 73
- P801 Range Extension 74
- P803 Shot / Pulse Mode 74
- P804 Confidence Threshold 75
- P805 Echo Confidence 75
- P806 Echo Strength 76
- P807 Noise 76
- P810 Scope Displays 77
- P816 Echo Time Raw 78
- P817 Profile Pointer Time 78
- P818 Profile Pointer Distance 78
- P820 Algorithm 79
- P821 Spike Filter 80
- P822 Narrow Echo Filter 80
- P823 Reform Echo 80
- P825 Echo Marker Trigger 81
- P830 TVT Type 81
- Selects the TVT Curve used 81
- P831 TVT Shaper 82
- P832 TVT Shaper Adjust 82
- P833 TVT Start Min 83
- P834 TVT Start Duration 83
- P835 TVT Slope Min 83
- P840 Short Shot Number 84
- P841 Long Shot Number 84
- P842 Short Shot Frequency 84
- P843 Long Shot Frequency 85
- P844 Short Shot Width 85
- P845 Long Shot Width 85
- P850 Short Shot Bias 85
- Test (P90 0 to P913) 86
- P902 Watchdog 87
- P903 Display 87
- P904 Keypad 87
- P905 Transmit Pulse 87
- P906 Communications 87
- P907 Programmer Interface 88
- P910 Relay 88
- P911 mA Output Value 88
- P912 Transducer Temperature 88
- P913 Sensor Temperature 88
- Measurement (P920 to P927) 89
- P924 Volume Measurement 90
- P927 Distance Percent 90
- Master Reset (P999) 90
- Technical Reference 91
- Dolphin Plus Display 92
- Universal, Linear (P050 = 9) 93
- Universal, Curved (P050 = 10) 94
- Application Examples 95
- Material Level 96
- Material Volume 98
- Application Assistance 100
- MT-00 Measurement Message 101
- MT-01 Hold Message 102
- MT-03 Point Not Scanned 103
- Maintenance 104
- Troubleshooting Guide 105
- Measurement Difficulties 106
- Flashing LOE Display 106
- Fixed Reading 107
- Wrong Reading 108
- Troubleshooting 109
- Programming Charts 110
- # Name 1 2 3 111
- *7ml19985BE02* 114
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