TROLL 9500 Operator's Manual - Geotech Environmental Equipment

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Section 18: TurbidityCleaning may be necessary if the optical windows of the sensorbecome visibly contaminated by the gradual accumulation of foreignmaterial. Because the sensor is not removable, we recommend gentleswabbing of the windows with a circular motion using plain water.Solvents are not recommended, although an ammonia solution (e.g.,grocery-store ammonia) may be used with good effect to removeparticularly stubborn materials.A calibration check should be performed after cleaning, using calibrationstandards.Wiper MaintenanceThe cotton wiper pad will require replacement periodically to maintainits effectiveness in cleaning the turbidity sensor optics. The entirehead may be replaced, or just the pad. In either case, the wiper headwill need to be removed. A hex wrench is supplied for this purpose.You do not need to remove the entire wiper; leave the wiper bodyinstalled in port 3.Replacement pads and wiper headsare available from In-Situ Inc. or yourdistributor.Removing the Wiper HeadWith the wiper parked over port 4, loosenthe set screw on the wiper head until youcan grasp the wiper head and gently pullit out.Replacing the Wiper PadTo remove the wiper head,use the supplied hex wrenchto loosen the set screw1. Remove the wiper head as above. Remove and discard the usedpad.2. Insert a new pad into the slots with the smooth side facing out, andpull to eliminate slack. Excess material may be trimmed close tothe wiper head.3. Position the head on the motor shaft with the pad facing down towardthe sensors. The button at the top of the shaft should be flushwith the wiper head surface. Tighten the set screw against the flatof the motor shaft. Be very careful not to move the wiper headin a lateral direction by hand after tightening.4. If convenient, connect in software, select the wiper, and click Wipeto ensure the wiper passes over the turbidity sensor optics properly.Adjusting Wiper PressureIf necessary, loosen the set screw on the wiper head and gently pullthe head up or press down lightly to ensure the pad just brushes theoptical windows when it passes over the turbidity sensor. Then retightenthe set screw. Be very careful not to move the wiper headin a lateral direction by hand when engaged with the motor shaft.TIP: The wiper head is at the best height when it justbrushes the optical windows of the turbidity sensor—too highand it will not clean effectively; too low and it may not be able to spin.If it is necessary to remove the entire wiper assembly, besure to use the sensor removal tool and grasp the body ofthe wiper. Do not attempt to pull the wiper out by the head.Wiper Replacement PartsCatalog No.Replacement wiper head ....................................................... 0044520Wiper pad replacement kit...................................................... 0044530ReferencesASTM method D1889-88(A)Eaton, A.D., L.S. Clesceri, E.W. Rice, and A.E. Greenberg, eds.,Standard Methods for the Examination of Water and Wastewater,21st edition, Washington, D.C.: American Public Health Association,American Water Works Association, and Water EnvironmentFederation, 2005. Section 2130, Turbidity.EPA, Methods for Chemical Analysis of Water and Wastes,EPA/600/4-79-020, revised March 1983. Method 180.1, Turbidity,Nephelometric. Approved at 40 CFR Part 136.EPA, Methods for the Determination of Inorganic Substances inEnvironmental Samples, EPA/600/R-93-100, August 1993. Method180.1, Determination of Turbidity by Nephelometry, Revision 2.0.Approved at 40 CFR Part 141.International Organization for Standardization (ISO), 1999. WaterQuality—Determination of Turbidity, Method 7027.Nollet, Leo M. L., ed. Handbook of Water Analysis. Marcel DekkerInc., New York, 2000.U.S. Geological Survey, Methods for Analysis of Inorganic Substancesin Water and Fluvial Sediments, U.S. Department of the Interior,Techniques of Water-Resources Investigations of the U.S. GeologicalSurvey, I-3860-85.TROLL 9500 Operator’s Manual 1290095110 rev. 007 01/09
Multi-ParameterWater Quality TROLL ®19 SDI-12 OperationSDI-12 is a serial digital interface that operates at 1200 baud. In-Situ’sSDI-12 Adapter enables processing of the MP TROLL 9500’s sensormeasurements by a standard SDI-12 data recorder.SDI-12 Requirements• MP TROLL 9500 (firmware 1.54 or later)• SDI-12 Adapter (for proper power management)• SDI-12 data recorder (customer-supplied)WiringConnect the stripped and tinned wires from the SDI-12Adapter to the terminal block of an SDI-12 data recorder (orto an SDI-12 network) as follows.• WHITE - serial data line• BLACK - ground line• RED - 12-volt supply line• GREEN - shieldThe data recorder or an external power supply may provide power(9.6 - 16 V) to the 12V line. The shield should be terminated (grounded)at the data recorder.Minimum voltage supplied per the SDI-12 specification (9.6V) issufficient to power a TROLL 9500 on 170 ft (52 m) of RuggedCable.Cables as long as 300 ft (91 m) may be used, depending on powersupplied. Before using cables longer than 170 ft (52 m) we recommendthat you measure the voltage at the Adapter. The table listspower requirements for specific submersible cable lengths.ConnectionsAttach the Twist-Lock Connector on the MP TROLL’s RuggedCable tothe matching connector on the SDI-12 Adapter.The Adapter is weather-resistant but not completely waterproof. It isnot designed to be exposed to the elements. Provide a weather-resistantenclosure for optimum operation.Table 19-1. Cable length & power supply requirementsSDI-12 SupportCable length Power supplyfeet meters requirement170 52 9.6 V180 55 9.8 V190 58 9.9 V200 61 10.1 V210 64 10.3 V220 67 10.4 V230 70 10.6 V240 73 10.8 V250 76 10.9 V260 79 11.1 V270 82 11.3 V280 85 11.4 V290 88 11.6 V300 91 11.8 VThe MP TROLL 9500 supports the SDI-12 Version 1.3 commands.Data loggers that support SDI-12 Version 1.3 can usually send theVersion 1.3 commands to an SDI-12 “sensor” like the MP TROLLautomatically. These commands are listed later in this section. Additionalinformation may be found in an SDI-12 reference, such as thatlisted at the end of this section. Or consult your SDI-12 data loggerdocumentation for more specific information.Insure SDI-12 is enabled (factory default) on the 9500. InWin-Situ 4 or Pocket-Situ 4, select the TROLL, click Edit...select SDI-12 Mode Preferences.Calibration of the water-quality sensors will need to be donethrough Win-Situ 4 or Pocket-Situ 4 as SDI-12 protocols donot support calibration.TROLL 9500 Operator’s Manual 1300095110 rev. 007 01/09
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Multi-ParameterWater Quality TROLL
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ContentsCalibration ...............
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ContentsSensor Care................
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Section 1: IntroductionConventionsT
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Section 1: IntroductionCleaning Gui
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Section 4: Control SoftwareSoftware
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Section 4: Control SoftwareEditing
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Section 4: Control SoftwareChoosing
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Section 5: ProfilingThe profiler ca
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Section 5: ProfilingCustomizing the
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Section 6: Logging DataWith a D.O.
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Section 6: Logging DataEVENT (conti
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Section 6: Logging DataStarting a M
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Section 6: Logging DataTransferring
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Section 6: Logging DataThe selected
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Section 10: Monitoring Water Qualit
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Section 11: pHE ois related to the
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Section 11: pH• pH readings in pu
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Section 12: ConductivityTypeOperati
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Page 112 and 113: Section 15: AmmoniumThe Ammonium Ca
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Page 116 and 117: Section 16: Chloride2. Remove the s
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Page 130 and 131: Section 18: TurbidityPolymer-based
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Page 138 and 139: Section 19: SDI-12 OperationSDI-12
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Page 154 and 155: GlossaryHost PC: Desktop computer r
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Page 160 and 161: Indexsaving data, 138setting unit p
Page 162 and 163: IndexTest Wizard, 35Text files, 45T
Page 164: Declaration of ConformityManufactur
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