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1. B 03 1004 Rev B Model 802 DeepMater Submersible Tiltmeter Figure 1 Model 802 DeepMater Tiltmeter Neoprene connector Y N Delrin locking sleeve Figure 2 High Pressure Connector and Cable Whip B 03 1004 Rev B Model 802 DeepMater Submersible Tiltmeter LONGITUDINAL CONFIGURATION Figure 3 Tiltmeter with Longitudinal Tilt Configuration TRANSVERSE CONFIGURATION Figure 4 Tiltmeter with Transverse Tilt Configuration B 03 1004 Rev B Model 802 DeepMater Submersible Tiltmeter S Sty gt i a 2 RM A ne sg Figure 5 Model 802 DeepMater Dimensions in Inches mm Figure 6 Model 802 DeepMater Mounting Hole Pattern B 03 1004 Rev B Model 802 DeepMater Submersible Tiltmeter Sensor connections Do NOT use ohmmeter Figure 7 Sensor Connections Inside the Model 802 DeepWater Tiltmeter B 03 1004 Rev B Model 802 DeepMater Submersible Tiltmeter 10 Appendix A Custom Specifications for Your Equipment Connectors and Wiring Serial number Model 802 H L High gain 50 5 range Longitudinal configuration Model 802 H T High gain 50 5 range Transverse configuration Model 802 S L Standard 3 range Longitudinal configuration Model 802 S T Standard 3 range Transverse configuration Model 802 W L Wide angle 4 50 range Longitudinal configuration Model 802 W T Standard2. 4 50 range Transverse configuration A 1 Scale Factors Single ended tilt output is measured between connector pins 4 and 2 green and white wires in cable whip Differential output is measured between connector pins 4 and 6 green and blue wires in cable whip see table next page The scale factor for differential output is one half the scale factor for single ended output Scale factors are determined by linear regression with a minimum of 10 steps over the calibration range Nonlinearity is the maximum deviation of any point from the regression line divided by the full calibration span 0 5 degree angular range 1 0 degree span expressed as a percentage of full span Calibration Summary for Your Tiltmeter The scale factor below is Single ended Differential Max nonlinearity Max nonlinearity of full span Calibrated over x Angular Range of uradians arc seconds arc minutes degrees Temperature sensor output single ended only is measured between the yellow orange and white wires pins 5 and 2 Temperature sensor scale factor is 0 1 C mV 0 mV 0 C Calibration Temperature Celsius B 03 1004 Rev B Model 802 DeepMater Submersible Tiltmeter 11 A 2 Filter Your tiltmeter has a two pole Butterworth low pass filter with a roll off of 12dB per octave 40 dB decade above the corner frequency The time constant for the filter is listed below 90 settling time is t
3. along the cable until it encounters the instrument s electronic circuitry where the delicate low voltage components are overloaded and fail The protections provided in your tiltmeter reduce the likelihood of failure Commercially available surge suppression circuitry can provide additional protection B 03 1004 Rev B Model 802 DeepMater Submersible Tiltmeter rd Maintenance and Troubleshooting 7 1 Routine Maintenance The routine maintenance procedures given here will help ensure that your DeepMater tiltmeter provides many years of trouble free service Keep your tiltmeter clean and away from extremes of heat and cold Dirt and extreme temperatures shorten the life of the seals and unnecessarily stress the electronic components Keep the tiltmeter out of direct summer sun because solar radiation can create internal temperatures much higher than the ambient temperature in some cases higher than the rated storage tempera ture of the tiltmeter To ensure that your tiltmeter maintains its waterproof seal make sure that the connector and the screws securing the lid are tight before submergence The O ring in the lid is made of nitrile Buna N and can be replaced if damaged by Parker O ring size 2 247 The O ring should be lubricated with a light coating of silicon grease such as Dow Corning 112 or Molykote 44 Medium The electrolytic tilt sensor in your tiltmeter is a stable robust and shock tolerant device One of the few things th
4. or recorder Current needed to power the tiltmeter flows in the power ground wire and as predicted by Ohm s Law the ground potential is different at opposite ends of this wire because of wire resistance By keeping signal ground separate from power ground your tilt and temperature readings will not be affected by this potential difference If you ground the power ground wire to earth do so at one end only Earthing in more than one location can produce ground loops and create unstable readings Variable resistance type surge absorbers connect each wire in the tiltmeter cable to the metal enclosure case that houses your tiltmeter If operated in salt water the tiltmeter case will be well grounded If operated on land connecting the enclosure to a grounding rod or other form of earth ground will reduce the likelihood of an electronic failure caused by high voltage transients Such transients can be caused by nearby lightning strikes or unstable power sources Grounding the cable shield PVC jacketed cables only to earth at the power supply end can also help avoid transient induced damage and can reduce noise in your measurements Note that the cable shield is terminated at the tiltmeter end and is not connected to the metal tiltmeter enclosure High voltage transients are the most common cause of failure of field instruments in out door installations In a typical occurrence a high voltage spike from a lightning strike or power surge travels
5. where the sensor lead wires connect to the printed circuit board Figure 7 Do not use an ohmmeter to check the sensor connections as doing so will permanently damage the sensor Visually inspect the lead wires and circuit board connector to verify that the connections are properly made If this inspection still fails to identify the problem contact the factory for assistance or to arrange for a repair 8 Warranty and Assistance Your Model 802 DeepMater tiltmeter is warranted against defects in materials and work manship for one year from the date of delivery We will repair or replace at our option products that prove to be defective during the warranty period provided they are returned prepaid to Applied Geomechanics Inc AGI No other warranty is expressed or implied The warranty is void 1f the equipment is subjected to lightning strikes or other large potential gradients or if it is otherwise used contrary to the directions herein After expiration of the warranty AGI will repair the equipment at its factory for parts and labor charges Products returned after warranty expiration should be accompanied by a purchase order to cover repair costs Applied Geomechanics Inc is not liable for consequential damages THE REMEDIES PROVIDED HEREIN ARE THE BUYER S SOLE AND EXCLUSIVE REMEDIES AGI SHALL NOT BE LIABLE FOR ANY DIRECT INDIRECT SPECIAL INCIDENTAL OR CONSEQUENTIAL DAMAGES WHETHER BASED ON CONTRACT TORT OR ANY OTHER LEGAL THEORY
6. 0 inches MOUNTING Four 5 1 mm 0 201 inch dia external mounting holes SEALS Nitrile Buna N face seal O rings in lid and bulkhead connector 6 pin male bulkhead connector neoprene over brass body neoprene in line connector 700 bars 10 000 psi depth rating 6 conductors Either neoprene cable 20 AWG no shield or PVC jacketed polypropylene insulated cable 24 AWG one overall shield 2 ft 60 cm neoprene whip is standard longer cables on request WEIGHT 5 kg 111b CONNECTORS CABLE Greater range available B 03 1004 Rev B Model 802 DeepWater Submersible Tiltmeter 2 4 Tiltmeter Operation 4 1 Initial Check Out Procedures Before installing your tiltmeter verify that it is functioning properly by following the steps below 1 Connect the red and black tiltmeter power wires to a suitable power supply see Specifications and the output wires to a voltmeter refer to the pin assignments and wire colors in Appendix A Or connect the tiltmeter to a Model 870 Readout Module and voltmeter 2 Ifusing the Model 870 Readout Module turn the Readout Module switch to TILT 3 Refer to the and tilt directions in Figures 3 or 4 also shown on a label on your tiltmeter With the tiltmeter in your hands rotate it to verify the sign polarity of the outputs A rotation in the direction should make the voltage output become more positive A rotation should make it become more negative 4 Che
7. 3333 83 33 B 03 1004 Rev B Model 802 DeepMater Submersible Tiltmeter 13
8. USER S MANUAL DeepMater MODEL 802 SUBMERSIBLE UNIAXIAL TILTMETER Serial No APPLIED SS GEOMECHANICS INCORPORATED 1336 Brommer Street Santa Cruz CA 95062 USA Tel 831 462 2801 Fax 831 462 4418 e mail applied geomechanics com www geomechanics com WARNING NEVER USE AN OHMMETER TO MEASURE THE TILT SENSORS INSIDE THE TILTMETER APPLYING DC CURRENT THROUGH THE SENSORS WILL CAUSE PERMANENT DAMAGE THAT IS NOT COVERED BY THE WARRANTY Copyright 2003 by Applied Geomechanics Inc All rights reserved Manual No B 03 1004 Rev B Printed in USA TABLE OF CONTENTS 1 doftroductioll 1 2 Technical Features 1 1 2 1 3 JSDeciIICatlolis iuueni ea dd a ca rado d AN et Rad e 2 4 Tiltmeter Operation aao neut eh nee nra E 3 4 1 INITIAL CHECK OUT PROCEDURES ttti 3 AD TIEHMETERTINSTALEATIONE tes Sects ce ee Ita Pr ripe MR IRR 3 4 3 RECORDING TILTMETER DATA WITH EXTERNAL RECORDERS 3 5 Converting Voltage Readings to Tilt Angles and Temperatures 4 6 Grounding and Transient Protection 4 7T Maintenance and Troubleshooting ess 5 7 1 ROUTINE MAINTENANCE sci ee dm atu a uu 5 7 2 SGONNECTOR MAINTENANCE hee sa b dee M tie a eae 5 7 3 DETERMINING THE CAUSE OF MALFUNCTIONS n 6 8 Warranty and 6 Appendix A Custom Specificati
9. at can damage it is Direct Current DC which causes electrolysis and plating of the electrodes Figure 7 shows the sensor connections to the circuit board NEVER use an ohmmeter which uses DC at these locations WARNING NEVER USE AN OHMMETER TO MEASURE THE TILT SENSORS INSIDE THE TILTMETER APPLYING DC CURRENT THROUGH THE SENSORS WILL CAUSE PERMANENT DAMAGE THAT IS NOT COVERED BY THE WARRANTY 7 2 Connector Maintenance The following handling procedures should be adopted to achieve the best performance from your tiltmeter s high pressure connectors courtesy of Subconn Inc e Do not expose the connectors to long term heat or sunshine If this occurs and the connectors are very dry soak in fresh water before use e Keep the connectors lubricated The recommended lubricant is Molykote 44 Medium Use sparingly half a match head per contact 15 adequate e Sand or mud in the female contact should be removed with fresh water Failure to do so could result in splaying of the female contact and damage to the O ring seals e Do not overtighten the bulkhead nut e Do not disconnect by pulling on the cable Avoid sharp bends at cable entry B 03 1004 Rev B Model 802 DeepWater Submersible Tiltmeter 5 e When disconnecting pull straight not at an angle e Do not apply angular loads shears to the bulkhead connector as they can damage or destroy the connector 7 3 Determining the Cause of Malfunctions Apart from the proc
10. ation and test records of every tiltmeter built B 03 1004 Rev B Model 802 DeepMater Submersible Tiltmeter 3 Specifications Model 802 H Model 802 S Model 802 W High Gain Version Standard Version Wide Angle Version ANGULAR RANGE SCALE FACTORS 0 1 Volt single ended 0 6 Volt single ended 10 Volt single ended 0 05 Volt differential 0 3 Volt differential 5 Volt differential REPEATABILITY lt 0 0002 degree 0 001 degree 0 02 degree LINEARITY of full span typical lt 2 of full span typical 5 of full span typical 0 TEMPERATURE Scale factor Ks lt 0 02 C typ Ks lt 0 02 typ Ks lt 0 02 typ COEFFICIENT Zero shift Kz 0 0002 degree C Kz 0 0002 degree C typ Kz 0 002 degree C typ TIME CONSTANT T 1 75 seconds 2 pole noces filter faster response ts second RESOLUTION 0 0001 degree 1 75 uradians 0 0006 degree 10 5 uradians 0 01 degree TILT OUTPUT 5 VDC single ended 10 VDC differential both provided TEMPERATURE OUTPUT 0 1 C mV single ended 40 to 100 C 0 75 C accuracy 0 C 0 mV OUTPUT IMPEDANCE 270 Ohms short circuit and surge protected POWER REQ TS 8 to 18 VDC 8 mA 250 mV peak to peak ripple max reverse polarity protected ENVIRONMENTAL 25 to 70 C operating 30 to 100 C storage submersible to 250 bars 3 600 psi ENCLOSURE amp 316 stainless steel enclosure machined from single block 149 x 91 x 82 mm 5 85 x 3 56 x 3 2
11. ck that the tiltmeter output moves through its full range of approximately 5 Volts to 5 Volts single ended or 10 Volts to 10 Volts differential When using the Model 870 Readout Module the output that 1s displayed on the voltmeter is single ended Note that the positive output is typically greater than 5 Volts single ended 10 Volts differential 5 Next connect the voltmeter to the temperature output and signal ground see Appen dix A or turn the Readout Module switch to TEMPERATURE Verify that the tem perature sensor output approximates the temperature in your location For example a room temperature of 20 68 F should give a voltage output of 200 mV 0 200 volts The temperature sensor scale factor is 0 1 C mV If your results do not conform to these guidelines check your procedure and repeat the measurement sequence above If you are still unable to successfully complete the check out procedure contact Applied Geomechanics for assistance 4 2 Tiltmeter Installation Your Model 802 DeepWater tiltmeter is designed to be mounted directly onto a solid hori zontal surface using four No 10 or M4 screws External holes in the submersible stainless steel case are provided for mounting the tiltmeter Figures 5 and 6 The surface may be drilled and tapped to accept the screws or through holes may be drilled and the screws attached with nuts and washers on the underside of the surface 43 Recording Tiltmeter Data wit
12. edures described below your Model 802 DeepWater tiltmeter is not field serviceable If you encounter problems not described here please contact Applied Geomechanics Inc at telephone 831 462 2801 fax 831 462 4418 or email us at service geomechanics com A service engineer will assist you in determining the cause of any problem If there is no output when the tiltmeter 1s connected to a power supply or to the Model 870 Readout Module first check that your multimeter or recording device has adequate power and is functioning properly Then check the power supply to be sure that it is providing power to the tiltmeter Verify that all connectors are securely attached Failure to obtain an output signal from the tiltmeter normally is the result of lack of power or a broken wire or connection If the tiltmeter output is firmly pegged at either end of its output range the tiltmeter is probably tilted off scale Rotate the tiltmeter in the opposite tilt direction to check this possibility The tiltmeter output should pass through zero volts as you move it through its null level position Remember that the response is not instantaneous because of the time constant of the filter However no more than a few seconds should elapse before the tiltmeter responds as it moves through null If the tiltmeter output remains pegged at its positive or negative limit no matter how much you move it the cause may be a broken connection or short circuit
13. electronics and an electrolytic tilt sensor which is the internal sensing element Measured angular movement is referenced to the unchanging vertical gravity vector eliminating the time and expense of locating an external datum DeepMater tiltmeters are an excellent choice for monitoring the behavior of underwater structures such as dams oil platforms and pipelines measuring the rotational movement of underwater machinery and tracking the pitch and roll of marine vessels 2 Technical Features Your Model 802 DeepWater is the newest addition to Applied Geomechanics line of 800 Series uniaxial tiltmeters which was first introduced in 1989 Model 802 senses angular movement rotation with respect to the vertical gravity vector The sensing element is an electrolytic tilt transducer similar to a spirit level As the transducer tilts internal electrodes are covered or uncovered by a conductive fluid This process produces changes in electrical resistance when an AC excitation is passed through the transducer These changes are measured using a voltage divider network The resulting signal is then amplified actively rectified and filtered to form a high level DC signal that is proportional to the measured angular rotation or tilt Both single ended and differential tilt outputs are provided High reliability components and surge protection enhance tiltmeter performance under electrically noisy or transient prone conditions A 2 pole Butterwort
14. h External Recorders The analog output of your Model 802 DeepMater tiltmeter is readily measured by a vari ety of external devices including digital voltmeters oscilloscopes strip chart recorders data B 03 1004 Rev B Model 802 DeepMater Submersible Tiltmeter loggers and PC based data acquisition systems Just connect your tiltmeter cable to a suitable external power supply and to the inputs of your recording device Refer to the cable color coding table in Appendix A for the information you will need to make these connections 5 Converting Voltage Readings to Tilt Angles and Temperatures The tiltmeter voltage outputs are quickly converted to tilt angles as follows Multiply the voltage reading by the scale factor in Appendix A For example if the scale factor 1s 0 600 degree Volt and the voltage reading is 2 000 Volts then the tilt angle is 1 200 degrees from sensor null Similarly the voltage reading from the tiltmeter temperature sensor is converted to tem perature by multiplying it by a scale factor of 0 1 C mV 100 C Volt with 0 mV 0 C 6 Grounding and Transient Protection Your tiltmeter has separate power ground and signal ground wires in the tiltmeter cable Both are connected common inside the tiltmeter Signal Ground is the reference state for single ended tilt measurements and for temperature measurements We recommend that you do not connect the Power Ground and Signal Ground wires at your power supply
15. h low pass filter removes vibration effects for static measurements In addition your tiltmeter contains a built in temperature sensor with single ended analog voltage output This temperature sensor provides the data that can be used for analysis of thermal deformation and stresses Your tiltmeter 1 equipped with a 6 pin male Subconn MicroCircular bulkhead connector for external power and signal connections Figure 1 This neoprene connector has a depth rating of 700 bars 10 000 psi The tiltmeter comes with a mating female connector and cable whip Figure 2 The required cable length is specified when ordering The pressure rating of the tiltmeter housing is 250 bars 3600 psi Model 802 DeepWater tiltmeters are produced in high gain 0 5 range standard 3 range and wide angle 2 50 range versions Each version is available in both longitudinal and transverse tilt configurations to better meet your installation requirements Figures 3 and 4 The version that you have selected 15 indicated at the beginning of Appendix A Other important features include the following electronics reside on a single internal printed circuit board circuit board external connections are gold plated for long life and noise free operation resistors are premium quality 1 tolerance metal film type tiltmeters are assembled calibrated and tested at our plant under strict quality standards AGI maintains complete calibr
16. hree time constants Corner or cutoff frequency f is calculated as f 1 2 T seconds A 3 Connectors and Cable Your Model 802 DeepWater tiltmeter uses the following connectors Subconn Part No AGI Part No Bulkhead Connector male MCBH6M 00357 In Line Connector female on Cable Whip MCIL6F 00358 Delrin Locking Sleeve female MCDLSF 00359 Two kinds of cable are available on the cable whip 1 Neoprene SO cable with 20 AWG conductors or 2 PVC jacketed polypropylene insulated cable with 24 AWG conductors In some cable whips the PVC jacketed cable is joined to the neoprene cable with a waterproof splice The table below gives the wire color coding and connector pin assignments A drawing of the connector pin configuration follows the table Connector Pin Wire Color in Cable Function 1 Black Power Ground 2 White Signal Ground 3 Red 8 to 18 Volts DC 4 Green Tilt 5 Yellow Orange Temperature 6 Blue Tilt Signal and power grounds are common inside the tiltmeter Figure 8 Face View of Male Connector on Tiltmeter B 03 1004 Rev B Model 802 DeepMater Submersible Tiltmeter 12 A 4 Angle Conversion Chart degi arc minut rc seconds uradians mm mete hes ft hages 1 o ss nem oz d amo saoo 5 13 10 3 44 10 02063 0 001 1 20 10 0 0573 3 436 206 3 1000 0 0120 4775 286 5 17189 8
17. ons for Your 11 ASI SCALE FACTOR S ie it 11 Z4 FILTER Tea en 12 A 3 CONNECTORS AND CABLE e RR RR RE E ER RR 12 A 4 X ANGLE CONVERSION CHART ttt 13 Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7 Figure 8 LIST OF FIGURES Model 802 DeepMater nn 7 High Pressure Connector and Cable 7j Tiltmeter with Longitudinal Tilt Configuration sess nnne 8 Tiltmeter with Transverse Tilt enne 8 Model 802 DeepMater Dimensions in Inches mm enne 9 Model 802 DeepMater Mounting Hole Pattern sss ene ener nnne 9 Sensor Connections Inside the Model 802 DeepMater Tiltmeter sess 10 Face View of Male Connector on eene enne nennen enne 12 1 Introduction The Model 802 DeepMater is precision uniaxial tiltmeter designed for underwater tilt measurements and other applications involving high external pressures Figure 1 Model 802 offers unrivaled sensitivity and long term stability under these demanding conditions The 316 stainless steel housing encloses stable low noise
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