Manual - RS Hydro
Contents
1. of the ANALITE NEP9000 and NEP9500 series probes are made of 316 stainless steel but the optic face is made of plastic materials and so should be protected from accidental scratching or abrasion The wiper arm assembly should be replaced periodically to avoid abrasive material build up in the pad that may eventually abrade the optic face The optic face is partially protected from damage by the protruding castellations in the probe casing To avoid crevice corrosion on the 316 stainless steel casing in salt and acidic water deployments it is strongly recommended that the probe be thoroughly washed in clean water after deployment and prior to storage Failure due to crevice corrosion is not covered under warranty A composite cased version is available for corrosive and sea water environments but its pressure rating is limited 30m If the probe body is to be installed in a glanded fitting for insertion into a pipe etc then care must be taken to ensure the sealing surface pressures offered by the gland fitting are not excessive so as to not cause distortion of the probe casing and force leakage The ANALITE NEP9000 and NEP9500 series probes are thin wall instrument and so glanding pressure must be minimal and spread over the largest possible area Do not cut or damage the outer sheath of the cable Water may enter the probe through holes or cuts in the cable sheath Where damage may occur due to river rocks striking or rolling over the probe body a pro2. to Council Directive 89 336 EEC We McVan Instruments Pty Ltd declare under our sole responsibility that the product Analite NEP9000 and NEP9500 SERIES of turbidity probes and accessories Manufactured by McVan Instruments Pty Ltd To which this declaration relates are in conformity with the protection requirements of Council Directives 89 336 EEC on the approximation of the laws relating to electromagnetic compatibly This Declaration of Conformity is based upon compliance of the product with the following harmonised standards Emissions EN50081 1 1992 Immunity EN50082 1 1997 Signed by John Van de Vreede Director Date of Issue 1 DECEMBER 2002 Place of Issue McVan Instruments Pty Ltd 58 Geddes Street Mulgrave VIC 3170 Australia CE Cr M Van Instruments ABN 56 007 283 963 58 Geddes Street PO Box 298 Mulgrave Victoria AUSTRALIA 3170 Tel 61 3 9582 7333 Fax 61 3 9560 1164 E mail info mcvan com Internet www mcvan com Page 11 V2 21 2007 Protection Shroud 190 mm for NEP260 probe 203mm for NEP9xxx probes 19mm E lt o INSERT PROBE K _OD38 2mm r N 3 off M4 x 8 hex SS set screws 120 __ _Flow through holes to fasten to probe end approx 13 5 dia FITTING Insert the Analite turbidity probe into the shroud as shown Ensure end of probe is against internal stop at other end of shroud Rotate the probe in the shroud so as to give the lowest p
3. ANALI NEP9504G Shown ANALITE NEP9000 AND NEP9500 SERIES TURBIDITY PROBE USER MANUAL V2 21 2007 Mc Van trumentsin ABN 56 007 283 963 58 Geddes Street PO Box 298 Mulgrave Victoria AUSTRALIA 3170 Tel 61 3 9582 7333 Fax 61 3 9560 1164 N827 E mail info mcvan com Internet www mcvan com V2 21 2007 Page 2 ANALIS ANALITE NEP9000 and NEP9500 Series Turbidity Probe User Manual Introduction Thank you for purchasing an ANALITE NEP9000 or NEP9500 series turbidity probe It will give you years of service if you install and maintain it according to guidelines set out in this Manual The ANALITE NEP9000 and NEP9500 series of turbidity probes are an enhanced version of our successful ANALITE 190 and 195 series probes They offer better performance more output options and greater ease of deployment yet are available in the same mechanical package G version The ANALITE NEP9000 and NEP9500 series turbidity probes are designed for monitoring and process applications where turbidity levels of up to 3 000NTU may be encountered Standard ranges are 100NTU 400NTU and 1 000NTU but custom ranges are available Specifically the ANALITE NEP9000 probes are designed for applications that will not allow bio fouling to build up such as short monitoring deployment or placement in fast and cold running water The ANALITE NEP9500 probes however with their integral wiper assembly are designed where bio fouling or sedimen
4. NEP9500 ONLY NEP90xx PROBE SHIELD NEP95xx PROBE 1 NO CONNECTION WITHIN PROBE NO WIPE FUNCTION Pin 1 WHITE ON NEP90xx PROBES CURRENT OUT 4 20mA Note Pins 3 and 4 are connected together within the probe 4 20mA Monitor Display 350 ohm impedance maximum LE CURRENT RETURN Pin 4 YELLOW Connection to the ANALITE TM5 The NEP9000 and NEP9500 series are readiliy interfacable to the ANALITE TM5 Indicator Controller unit the probe output must be either 2 5V or 4 20mA The ANALITE TMBb is ideal for industrial control and alarm applications The ANALITE TMS allows for the selection of wiping intervals as well as allowing field calibration More information on the ANALITE TM5 can be downloaded from the McVan Instruments website at www mcvan com Normal termination of a NEP9000 or NEP9500 series probe with 2 5V output to an ANALITE TM5 is as tabled below ANALITE NEP9xxx Probe ANALITE TM5 Pin Colour Term No Circuit 1 White 46 NTU Vout Signal 2 Brown 44 12Vdc Power 3 Green 43 Power Common 4 Yellow 45 NTU Vout Common 5 Grey 47 Clean Wipe NEP95xx only If the TM is fitted with the 4 20mA input option a NEP9000 or NEP9500 series probe with current output may be terminated as tabled below ANALITE NEP9xxx Probe ANALITE TM5 with 4 20mA option Pin Colour Term No Circuit 1 White 50 NTU I Sig
5. considered given that many installations are in the wild It is important to note that the NEP9000 and NEP9500 series probes have the stainless steel casing terminated only to the cable shield There is no electrical contact between the casing and the probe electronics The signal ground 4 and power ground 3 are electrically bound together within the probe Probe Connection The standard version of the NEP9000 and NEP9500 probes are fitted with a 7 pin male marine connector with an open face pressure rating of 50m This means that if the probe is accidentally submerged when not connected or improperly connected to its mating cable assembly a pressure rating of only 50m is offered The mating female cable connector is supplied with the specifiied cable length When the cable connector is properly mated to the probe the overall pressure rating is 100m A fixed and glanded cable version is also available and these versions have the G suffix attached to the part number The cable conductor assignment is as shown below Note that the Signal Common yellow and Supply Common green conductors are electrically connected together within the probe The stainless steel cover is connected only to the cable shield The probe is designed to operate with most data loggers PLC and DAS systems available today When using the NEP9500 models some form of wiper actuation control may be required depending on the wiping protocol selected This is discuss
6. d for G version The standard version utilises the water proof connector The version utilising a fixed and glanded cable includes the G suffix after the part number eg NEP9504G Page 4 Installation There are two aspects to consider when preparing to install the ANALITE NEP9000 or NEP9500 series probes in the field 1 Installation of the probe proper into the environment where measurements are to take place 2 Cabling considerations 3 Connection of the probe into the data collection and control system Probe Installation The probe is normally installed with the optics pointing downwards but not vertical or in a horizontal alignment In a simple application the probe is simply immersed into the water to the desired depth but within the depth rating of the probe Please note the depth rating is based on static water Allowances must be made for the effect of flowing water to ensure the static depth rating is not exceeded If the probe is to be installed downwards then it is recommended to install it a few degrees away from the vertical to allow bubbles to escape away from the optic face Probes with integrated wiping should be installed such that they can be easily retreived from time to time to replace the wiper arm assembly It is important that the optic end of the probe is kept clear of obstruction such as the river bed The minimum distance between the optic head and any object should be 50mm 27 The standard casing
7. e Page 5 V2 21 2007 Electrical Because long cable lengths are common some electrical factors should be taken into account and these are discussed below Voltage Output Version ANALITE NEP9000 and NEP9500 probes may have an analogue voltage output with a nominal output impedance of 100 ohms Conductor resistance is nominally 73 ohms km or 7 3 ohms for 100 meter probe cable and this may need to be taken into account in some configurations particularly with regards to logger channels that have low input impedance say less than 10 000 ohms For particularly long cable runs the 4 20mA current output version is recommended 4 20mA Current Output Version ANALITE NEP9000 and NEP9500 probes may have an analogue 4 20mA current output with a maximum load rating of 3500hms consequently cable loop resistance should be taken into account The PUR cable normally supplied with the probes has a nominal loop resistance of 14 6 ohms per 100m A schematic of the probe and its load is shown below VE SUPPLY 9 6 to 28Vdc 4 20mA Source NTU OUTPUT I 4 20MA YELLOW nee a NTU RETURN lt 3 GREEN OV SUPPLY COMMON NEP9xxx Probe For very long cable runs gt 200m it may be advisable to connect the the NTU Return conductor to the Supply Common conductor at the end of the cable to reduce the voltage drop along the run Surge and Lightning Considerations Surge and lightning protection may also have to be
8. e contact with the probe face only the pad should be in contact A gap of 0 5mm between the wiper arm and the optic face is typical when a new pad has been properly installed NOTE It is imperrative that the set screw be fastened squarely aligned onto the flat on the shaft otherwise proper operation will be affected CAUTION Do not over tighten the set screw or manually attempt to rotate the wiper arm once set onto the shaft Any attempt to manually rotate the wiper may cause gearbox damage and void the warranty Calibration Confirmation and Turbidity Standards The ANALITE NEP9000 and NEP9500 probes are factory calibrated using non toxic neutral density polymer based turbidity standards Solution values up to 1 000NTU as USA EPA certified 10NTU 40NTU 100NTU 400NTU and 1 000NTU neutral density polymer based turbidity standards are available from McVan Instruments and their distributors or directly from the manufacturer for US customers only We recommend the use of one of these standards and pure water for a calibration confirmation The standards should not be diluted as this will reduce the effect of the anti fungal agent contained in the standard solutions Because a turbidity probe is inherently an optical device care must be taken during a calibration confirmation to ensure that external optical effects are kept to a minimum This is best implemented by placing calibration solutions in dark leak proof bottles with a non reflective
9. e is gently moved a few millimeters in any direction Page 9 V2 21 2007 Physical Dimensions NEP9000 and NEP9500 Probes Marine 7 way connector 100m rated when properly mated Wiper on Probe Diameter 32 NEP9500 Case material 316 Stainless steel models only STANDARD VERSION Cable is fixed and glanded G VERSION FIXED GLANDED CABLE All dimensions in mm Warranty The ANALITE NEP9000 and NEP9500 series turbidity probes are warranted against defects in material and workmanship for one year from date of purchase exclusive of the wiper assembly The warranty does not cover the wiper arm assembly corrosion or leakage due to corrosion Unauthorized service tampering or abuse will void this warranty Damage as a result of improper installation will also void this warranty Should you require service under warranty or otherwise please contact the McVan Instrument distributor from whom you purchased the probe or our Service Centre If the probe is being returned for service under warranty please supply proof of purchase All support enquiries must include the serial number of the probe labelled on the casing of the probe The shipping address for probe returns is McVan Instruments Service Centre 58 Geddes Street Mulgrave VIC 3170 AUSTRALIA Tel 61 3 9582 7333 Fax 61 3 9560 1164 E mail info mcvan com V2 21 2007 Page 10 Electrical Conformity EC Declaration of Conformit ity according
10. finish such as Nalgene 2106 bottles in amber These are available from McVan Instruments with wide necks and a nominal capacity of 1 000ml and carry the part number NEP BTL The calibration routine is best done under natural or incandescent lighting not fluorescent or arc Another critical factor is cleanliness Any debris or water that makes its way into the calibration solutions will affect its value It is therefore a good practice to have an ample supply of distilled de ionized water and a means of properly drying the probe end clean compressed air is ideal Wipers should always be removed prior to a calibration routine Probes should be flushed in two containers of distilled water with thorough drying in between and before insertion into a calibration solution Also where ever possible a calibration confirmation should commence at a lower value usually zero and work up in value to further minimize the effects of cross contamination CAUTION ALWAYS REMOVE THE WIPER PRIOR TO CALIBRATION When inserting the NEP9000 or NEP9500 probe into a calibration solution ensure that the optic face of the probe is at least 50mm from the base and all sides of the bottle This is particularly important for low turbidity solutions below 200NTU Hold the probe a few degrees from the vertical and gently tap it on the bottle rim so as to dislodge any air bubble on the optic face If the probe is properly placed the measurement value will not vary if the prob
11. heathed 7 pin male waterproof to 100m when mated Open face pressure of 50m Specify at time of order Cable part number is NEP CBL 100m stainless steel casing 30m composite casing 5 C to 40 C 20 C to 50 C Disposable and consumable Foam Pad on PVC or Acetal arm Field replaceable Mounted on central shaft fixed by hex set screw onto flat of wiper shaft 1 By external TTL CMOS active low pulse or momentarily contacting the wiper actuation conductor pin 5 to OV pin 3 Automatic wipe every 2 hours if the wiper actuation conductor pin 5 is permanently connected to OV pin 3 and also when applying normal power to the probe f F On NEP9500 series only Actuation Pulse Duration gt 50mSec lt 500mSec Actuation Pulse Current On NEP9500 series only Sink 1mA max Wiping Time On NEP9500 series only 8 second nominal During the wipe the output is held to the output value just prior to the wipe 1 Power S O Accessories NEP19WIPE NEP390 CA xx Wiper Kit comprises 4 replacement wipers and hex fastening key for the ANALITE NEP9500 series only Also used on the ANALITE NEP195 395 amp 495 probes Shielded multi core cable assembly including mating connector to suit the standard version Length xx to be specified at time of probe order NEP19SHRD Stainless protective shroud to suit the NEP9000 and NEP9500 series NEP CBL Note V2 21 2007 Cable only xx meters specify at time of order Require
12. later in this manual V2 21 2007 Page 6 Pin 2 BROWN 9 6 28VDC SUPPLY VE Pin3 GREEN OV SUPPLY COMMON Pin 5 GREY PROBE RESET NEP9000 PROBE RESET WIPE AUTO WIPE NEP9500 ONLY NEP90xx PROBE SHIELD NEP95xx PROBE NO CONNECTION WITHIN PROBE Pin 1 WHITE NTU OUTPUT V or l NO WIPE FUNCTION ON NEP90xx PROBES Pin 4 YELLOW NTU COMMON V or RETURN I There are two wiping protocols available on the NEP9500 probes 1 A single wipe externally initiated by momentarily reseting the probe 2 An automatic wipe every two hours by terminating the Reset Wipe to the Power Common 1 The wiper on the NEP9500 probes can be actuated by momentarily connecting the Reset Wipe conductor 5 to the Power Common conductor 3 for longer than 50msec but less than 0 5 second This has the effect of resetting the probe which then initiates a wipe immediately after the inbuilt microprocessor has properly reset This protocol can be implemented using a mechanical switch arrangement or open collector drain output available on most loggers For multiple wipes each consecutive wipe must be actuated after the wiper has parked in its rest position approx 8 seconds after a wipe actuation Reset Wipe pulses applied during a wipe action will be ignored Note that during the wipe period the NTU output will be held at the value measured just prior to the wipe within 1 The recommended external wiper activation i
13. may become erratic due to the large particles passing the optic sensor Measuring turbidity under these circumstances will require a stilling well to allow the sand particles to settle away from the optic sensor in the probe tip Page 3 V2 21 2007 Specifications Parameter Measurement NEP9001 9501 NEP9004 9504 NEP9010 9510 NEP90xx 95xx 1SO7027 90 Custom to 100NTU 400NTU 1 000NTU 3 000NTU max Output Span Response Time 2 5Volts or 4 20mA where 2 5V or 4mA ONTU 0 to 1V and 0 to 2 5V outputs are also available Specify output at time of order Approx 1 second to 99 Zero Offset 0 to 40 C 3mV max Repeatability 25 C Temperature Coefficient 0 to 40 C Calibration compliance using APS AEPA polymer solutions lt 0 05 C 4 points 0 10 40 and 100NTU 4 points 0 40 100 and 400NTU 4 points 0 100 400 and 1000NTU 3 points min 0 and 2 other values Physical Standard Version see Physical Dimensions Probe Diameter Probe only Length Overall Length Weight probe only Cable Connector Cable Length Environmental Static Depth Rating Operating Temp Storage Temp Wiper Arrangement NEP9500 series only Actuation NEP9500 series only 32mm for 316 stainless steel casing 34mm for composite casing 181mm without wiper 188mm with wiper 267mm without wiper 274mm with wiper 120gms without wiper 190gms with wiper 5 core shield 6mm dia PUR s
14. n com V2 21 2007 Page 12
15. nal 2 Brown 44 12Vdc Power 3 Green 43 Power Common 4 Yellow 51 NTU I Signal 5 Grey 47 Clean Wipe NEP95xx only V2 21 2007 Page 8 Wiper Replacement This applies to the NEP9500 versions only The effectiveness of the wiper in maintaining a clean optical surface will eventually be compromised the time being dependent on the water under investigation and the number of wiping cycles carried out We recommend periodic inspection of the wiper pad to determine if the material is deteriorating or is impregnated with material from bio fouling Normally the wiper should be replaced every 4 to 6 weeks of deployment In addition as a precaution we recommend changing the wiper prior to each deployment The wiper is a consumable item and a spare is provided with each NEP9500 series probe along with a hex key to loosen and fasten the wiper set screw Wiper packs containing four wipers and a hex key are available Part Number NEP19WIPE as a standard accessory To change the wiper loosen the set screw in the wiper arm until the wiper assembly can be removed from the wiping shaft Place a new wiper assembly on the shaft with the set screw aligned squarely with the flat on the wiping shaft Gently press the wiper arm down until the wiper arm hits the stop on the shaft The wiper pad should now be compressed to roughly one half its original thickness Tighten the set screw do not over tighten It is important that the wiper arm does not mak
16. nterface arrangements are shown schematically below 2 Permenately connecting the Reset Wipe conductor 5 to the Power Common 3 will force an automatic wipe every two hours and when the probe power is applied Note that during the wipe period the NTU output will be held at the value measured just prior to the wipe within 1 Output from the probe during the initial wipe on a power up should be disregarded and data treated as valid say about 12 seconds after the power is applied The termination arrangement for the 2 hourly auto wipe is shown schematically below a a pe ee ee I I I I l l I Auto wipe Single wipe activation every 2 hours by external means l x 1 Wiper Actuation Circuitry I I N O I gt 50mS lt 500mS OV lt Green 9 3 lt NEP9500 SERIESPROBE_ Switch Typical Semiconductor NEP9000 Wiper Actuation Schematic V2 cdr 2 05 Actuation Actuation Current Output Arrangement When a NEP9000 or NEP9500 series probe is ordered with the 4 20mA current output the probe is configured as a high current source The load must be less than 350 ohms to ensure proper operation over the probe s specified power supply range The connection arrangment for a probe with a current output is shown below Page 7 V2 21 2007 Pin 2 BROWN 9 6 28VDC SUPPLY VE Pin 3 GREEN ms OV SUPPLY COMMON __Pin 5 GREY PROBE RESET NEP9000 PROBE RESET WIPE AUTO WIPE
17. ossible NTU output when in clear water Fasten the M4 screws onto the probe end Do not over tighten Re zero the instrument with the shroud fitted Approximate weight of the shroud alone is 400grams Material 316 Stainless Steel 1999 2005 McVan Instruments Pty Ltd File NEP SHROUD for NEP160 and NEP9xxx cdr Product Identification Nomenclature POLARITY OUTPUT CASING Omit 2 5v V Voltage Omit Stainless steel U Unipolar 1v or 2 5V Current P Composite Omit Current output Examples NEP9504GXV Probe with wiping 400NTU range with glanded cable fitted and 2 5v voltage output Casing is WIPING n RANGE CONNECTOR UNIPOLAR stainless steel 0 Non wiping 01 100NTU Omit Connector A 0 iv 5 Wiping 04 400NTU G Fixed glanded B 0 2 5v NEP9010UBXVP 10 1 000NTU cable Omit 2 5v Probe without wiping 1000NTU range with 30 3 000NTU Omit Current output standard connector and unipolar 0 2 5v voltage output Casing is composite NEP9501GXI oe ohh Probe with wiping 100NTU range with glanded Omit means that character is completely left out of the product code if the indicated cable fitted and 4 20mA current output Casing is parameter is required see examples stainless steel MCVan Instruments ABN 56 007 283 963 58 Geddes Street PO Box 298 Mulgrave Victoria AUSTRALIA 3170 Tel 61 3 9582 7333 Fax 61 3 9560 1164 E mail info mcvan com Internet www mcva
18. tation buildup is likely The ANALITE NEP9000 and NEP9500 series of probes with a stainless steel case may be submerged to a depth of 100 meters approx 330 feet The composite case version is rated to 30 meters approx 100 feet The ANALITE NEP9000 and NEP9500 probes use 90 optics and employs infrared light in accordance with ISO7027 All probes use a unique modulation technique that ensures almost total rejection of ambient light conditions as well as a unique microprocessor controlled differential sample and hold circuit for enhanced performance particularly at low turbidity levels Applications The applications that the ANALITE NEP9000 and NEP9500 probes are so extensive and too numerous to elaborate on in this document but generally they include 1 Monitoring of streams and rivers 2 Monitoring of water storage bodies including stratification studies 3 Intermediate and final effluent treatment monitoring 4 Hydrological run off studies 5 Ground and bore water analysis 6 Drinking water filtration efficiency 7 Industrial process monitoring 8 Sludge and dredge monitoring 9 Sediment load monitoring Which model is best used is dependent on the application the measuring environment the logging equipment and the monitoring period deployment times required The ANALITE turbidity probes are not suitable in situations where they may be abraded by large particles such as sand and under these circumstances the reading
19. tective shroud should be used which can be made of simple PVC piping or stainless steel which ever the situation warrants A shroud is available for the NEP9000 and NEP9500 as an accessory under the part number NEP19SHRD Such a shroud not only protects the probe but also assist in maintaining a minimum distance between probe optics and any local obstructions Cabling Considerations Physical Cable normally supplied with the ANALITE NEP9000 and NEP9500 series probes is a specially selected PUR sheathed and screened cable selected for strength chemical resilience and exceptional resistance to cuts nicks and abrasion The cable part number is NEP CBL Never the less care should be taken during the installation process of the probe and its cabling to ensure that the cable is not subjected to persistent pulling snagging abrasion or severe compression This is particularly important for the probes with fixed and glanded cable as any water penetration through the cable sheath may find its way into the probe proper affecting the accuracy of the readings and possibly causing irreparable damage For probes fitted with connectors care must be taken to ensure the connectors are properly mated to ensure a seal yet not screwed together too tightly so as to make their disconnection difficult after a long deployment Prior to mating make sure both the probe and cable connectors are dry in the termination area otherwise erratic operation may occur due to moistur
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