These versatile, high-precision, biaxial tiltmeters are well suited for a wide variety of measurement
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zTuff Tilt 420 4-20mA Precision Tiltmeter (Uniaxial) The Tuff Tilt 420 combines precision, long-term stability and rugged durability in a compact and reliable instrument. The internal sensing element is a gravity referenced ceramic tilt sensor that delivers high dynamic range and the best resolution of any sensor in its class. Housed in a weatherproof enclosure, this tiltmeter may be used outdoors and in other wet environments. The Tuff Tilt 420 is current loop powered, so tilt measurements can be made over long cable lengths using an economical 2-wire pair. As an added bonus, it also measures temperature using a built-in thermistor. Typical applications include: • Monitoring the performance of bridges, dams and other large structures; construction monitoring (standard version) • Antenna leveling and zenith finding (high-gain version) • Measuring the angular position of dam gates and Call us today for details about this versatile device! other machinery (wide-angle version). High-Gain Version Standard Version Wide-Angle Version ANGULAR RANGE ±0.5 degree (1 degree span) ±3 degrees (6 degrees span) ±50 degrees* (100 deg. span) SCALE FACTOR 0.0625 °/ mA typical 0.375 °/ mA typical 6.25 °/ mA typical RESOLUTION 0.01 degree <0.0001 degree (<1.75 µradians) 0.0006 degree (10 µradians) REPEATABILITY <0.0002 degree 0.001 degree 0.02 degree LINEARITY 1% of full span <2% of full span 0.5% of full span NATURAL FREQUENCY 3 Hz 3 Hz 7 Hz ...
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Tuff Tilt 420420mA Precision Tiltmeter (Uniaxial)TheTuff Tilt 420combines precision, longterm stability and rugged durability in a compact and reliable instrument. Theinternal sensing element is a gravity referenced ceramic tilt sensor that delivers high dynamic rangeandthe best resolution of any sensor in its class.Housed in a weatherproof enclosure, this tiltmeter may be used outdoors and in other wet environments. TheTuff Tilt 420is current loop powered, so tilt measurements can be made over long cable lengths using an economical 2wire pair. As an added bonus, it also measures temperature using a built in thermistor.Typical applications include: •Monitoring the performance of bridges, dams and other large structures; construction monitoring (standard version) •Antenna leveling and zenith finding (highgain version) •Measuring the angular position of dam gates andCall us today for details about this versatile device! other machinery (wideangle version). Standard VersionWideAngle VersionHighGain Version ANGULAR RANGE±3 degrees (6 degrees span)±50 degrees* (100 deg. span)±0.5 degree (1 degree span) SCALE FACTOR0.0625°/ mA typical0.375°/ mA typical6.25°/ mA typical RESOLUTION<0.0001 degree (<1.75µdegree (10radians) 0.0006µdegreeradians) 0.01 REPEATABILITY<0.0002 degree0.001 degree0.02 degree LINEARITY1% of full span<2% of full span0.5% of full span NATURAL FREQUENCY3 Hz7 Hz (critically damped)3 Hz o o Scale factor: KS< 0.04%/ C typ.KS< 0.1%/ C typ. TEMPERATURE COEF. o o Zero shift: KZ= ±0.0002 degree/ C typ.KZ= ±0.002 degree/ C typ. TILT OUTPUT420 mA twowire current loop t/TTIME CONSTANT,T150 msec; output is proportional to 1 ewheret= time in seconds TEMPERATURE OUTPUTTemperature is measured with a 2500 Ohm thermistor,−50 to +150°C range (0.02 Ampere xR+ 10 VDC) <Vs< 29 VDC POWER REQUIREMENTS,VS whereRis the resistance of the shunt resistor and loop wiring in Ohms ENVIRONMENTAL−40°to +85°C operating and storage ENCLOSURE & MOUNTINGRemove lid to access four mounting holes.Painted, diecast aluminum box, 120 x 80 x 60 mm. CABLE3m (10 ft), 5conductor + one overall shield, PVC jacket, tinned ends WEIGHT0.6 kg (1.5 lb) *greater range available UsefulAccessories PartNo. Tuff Tilt 420Order Numbers Vertical mounting bracket81439 TransverseTilt LongitudinalTiltHorizontal mounting plate84051 High Gain9800801 9800804Additional cable, specify length70369 Standard 98008029800805 6pininline receptacle62204 Wide Angle9800803 98008066socket inline plug62202
1336 Brommer Street, Santa Cruz, CA 95062 USATel.(831) 4622801, Fax (831) 4624418 applied@geomechanics.comz www.geomechanics.com L00255A,©2005 Applied Geomechanics Inc.
Tuff Tilt 420Uniaxial Tiltmeter
LABEL INDICATES AXIS CONFIGURATION
LONGITUDINAL
DIMENSIONS: mm(in.)
TRANSVERSE
Tiltmeter is available with either longitudinal or transverse tilt configuration.
Tuff Tilt 420:Wire Color CodeFunction WireColor Loop Power (Vsupply)Red Loop Return (Ground)Black Temperature Excitation (up to 12V)Blue Temperature OutYellow Temperature ReturnWhite Drain Wire (Shield)Bare (Clear)
1336 Brommer Street, Santa Cruz, CA 95062 USATel.(831) 4622801, Fax (831) 4624418 applied@geomechanics.comz www.geomechanics.com L00255A,©2005 Applied Geomechanics Inc.
Tuff Tilt 420Uniaxial Tiltmeter
TheTuff Tilt 420current signal is measured indirectly using a shunt resistor,RLaw states that. Ohm’sV1– V2= IR, whereIis current in Amperes,Rresistance in Ohms, andV1andV2the voltages measured on opposite sides of the shunt resistor. Temperaturemeasurement using the onboard thermistor is diagrammed below.
70000
60000
50000
40000 O H M 30000 S 20000
10000
0 60
Resistance vs. Temperature for 2500 Ohm Thermistor with B Type Curve (U.S. Sensors LR252B1K)
40 200 2040 60 Degrees Celsius T = 1/[A + B Ln(RT3) + C Ln(RT3)^3 + D Ln(RT3)^5] – 273.15 where T is in degrees Celsius and RT3 = thermistor resistance. A = 7.34862E04 B = 3.38205E04 C = 1.30862E07 D = 1.21751E09
1336 Brommer Street, Santa Cruz, CA 95062 USATel.(831) 4622801, Fax (831) 4624418 applied@geomechanics.comz www.geomechanics.com L00255A,©2005 Applied Geomechanics Inc.
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Tuff Tilt 420Uniaxial Tiltmeter
Mounting holes are accessed by removing lid of tiltmeter. Use 832 or 4 mm screws.
For mounting on vertical surfaces: Order the 81439 Mounting Bracket Assembly, which includes complete hardware. For mounting on horizontal surfaces: Screw the tiltmeterdirectly to the surface, or order the 84051 MountingPlate Assembly, which includes complete hardware. 1336 Brommer Street, Santa Cruz, CA 95062 USATel.(831) 4622801, Fax (831) 4624418 applied@geomechanics.comz www.geomechanics.com L00255A,©2005 Applied Geomechanics Inc.
