Pulsar M-920-S-001-1P Page 9 Service Manual Download | Manualshive

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The Components of the Echo Profile Display.

Threshold
Line

Measuring
Window

Measuring Line

Echo Profile

Tank
Floor
Indicator

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Summary of Contents for M-920-S-001-1P

Page 1: ...SLUDGE FINDER 2 SERVICE MANUAL...

Page 2: ...or alteration accident misapplication or negligence DISCLAIMER Pulsar Process Measurement Limited gives nor implies any process guarantee for the product and shall have no liability in respect of any...

Page 3: ......

Page 4: ...bility Menu under 1997 12 P050 Negative End 13 P051 Margin Enable 13 P052 End Margin 14 P067 Choose Peak 15 P068 Measure Percentage 16 P079 Use Gate 17 P088 Hard Default 17 Service Alarm 17 P194 Date...

Page 5: ......

Page 6: ......

Page 7: ...ardware functions Care and caution should be exercised when changing any of these parameters and any such changes should only be undertaken by or under the guidance of an experienced Service Engineer...

Page 8: ...lease contact Pulsar technical department There are no typical echo traces for Sludge Blanket applications the echo returns vary widely with the type of application and the concentration levels of the...

Page 9: ...Page 3 The Components of the Echo Profile Display Threshold Line Measuring Window Measuring Line Echo Profile Tank Floor Indicator...

Page 10: ...et the echo profile screen The first echo that is reflected back to the transducer is from the top of the sludge blanket the second echo with the sharper leading edge is the echo reflected back from t...

Page 11: ...Problematic Echo Profiles This echo profile is typical of what you would see if the transducer was out of the water No echo returns There is no sludge present the echo return is from the bottom of th...

Page 12: ...ded by material in flight or the blanket level is high enough to be surrounding the transducer Multiple echoes the unit is receiving multiple signal returns either from different densities of Sludge B...

Page 13: ...of the transducer to the interface in measurement units and then enter this value into P21 The unit will lock onto the true echo and attempt to suppress any unwanted echoes in the settling zone above...

Page 14: ...4 to establish fixed gain levels See table below for details Application Type SBR Application Type Secondary Default Application Dependant Application Type SBR Industrial Primary Secondary P43 Breakpo...

Page 15: ...leading edge of the gate as indicated below If Industrial or Primary is chosen as the application type this compensation is not present However in instances where there are large amounts of settling m...

Page 16: ...Page 10 The compensation works as explained below...

Page 17: ...d echoes the unit will need to see moving in the same direction before the display reading is updated This is to help prevent the displayed reading from fluctuating whilst inside the gate Sludge echoe...

Page 18: ...eing given due to the intermittent appearance of echoes from devices such as scrapers Values Min 1 Max 5000 P883 Gate Expand Available in Stability Menu under 1997 This parameter is closely associated...

Page 19: ...the rate of near signal amplitude suppression gain attenuation is applied over a distance starting at the gain breakpoint See the explanation of P43 for details Values Min 999 Max 999 P051 Margin Enab...

Page 20: ...lower levels is preventing the correct echo from being re established When the End Margin is set to on and the echo falls to a level below the level set in P52 then the Secondary Negative Gain applie...

Page 21: ...ge 15 P067 Choose Peak 1 Area 2 Largest 3 First 4 Last Example in the example below the tank bottom is at 5 9m therefore there are three distinct echoes within the unit span Default Transducer Dependa...

Page 22: ...es where the blue distance marker line intersects the echo profile Factory set to 80 of the total height of the leading edge echo This determines the measured distance Values Min 0 Max 100 Default 80...

Page 23: ...Passcode Default 1997 but will not reset any parameters which are accessed via the Service Code 552621 Thus ensuring any adjustments carried out by Service personnel are protected Options 0 No 1 Yes...

Page 24: ...D Code e g 1 for 01684 891371 P197 STD Code The STC Code e g 1684 for 01684 891371 P198 Phone Number The Phone Number e g 891371 for 01684 891371 P199 Reset Access the parameter and enter 1 Yes to res...

Page 25: ...es Min 0 Max 300 P886 Minimum Threshold The yellow trace indicates the minimum threshold i e the yellow trace will not fall below this value Values Min 0 Max 99 Default 10 Default 120 Default 10db 100...

Page 26: ...psed time between wiping cycles on initiation of a wipe cycle the wiper arm will perform three sweeps of the transducer face to keep it free from material build up Values Min 0 1 Max 99999 P888 Motor...

Page 27: ...To initiate a wipe from the run mode in order to check the wiper functionality the F5 hot key should be pressed Application Type Auto Parameter Settings Parameter SBR Industrial Primary Secondary Bre...

Page 28: ...ing from the blanket and objects under the surface of the material that could interfere with the ultrasonic beam If the transducer is mounted on a rotating bridge install the transducer on the leading...

Page 29: ...Page 23 If after switching on the unit the LCD displays one of the following messages No Xducer Xducer Fault L O E Failed Safe or Wiper Fault then you should check the transducer voltages and wiring...

Page 30: ...shorting them out should not damage the transducer Often the transducer extension cables are not the same colour as on the transducer integral cables so the voltages need to be checked at the local ju...

Page 31: ...Page 25 IF THE UNIT IS READING TO LOW...

Page 32: ...ettle Zone is sufficiently high so that the echoes returned from this area are bigger than those coming back from the actual Sludge Blanket This is not an uncommon problem in settlement tanks and the...

Page 33: ...The application is a secondary settlement tank P43 the Gain Setpoint has been re set to 1 5m to increase the negative gain applied to the profile and a P21 initiated The resultant echo profile is now...

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