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        <div id="content-top2">P. 38</div>
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    <pre style="white-space:pre-line"><code>Model A701-2A/B

       High-precision Platform Tiltmeter

The model A701-2 Platform mount tiltmeter is our most
popular design for high precision tilt measurements.
Units come with built in invar leveling legs, for easy
installation on any horizontal surface. The A701-2 also
includes two switchable gains and two low-pass filter
settings. Using an absolute gravity referenced
electrolytic sensor, the A701 delivers ultra-high
sensitivity to &lt;0.1 Î¼rad with virtually zero long-term
drift. Output is a stable Â±8 DC voltage (Â±16 VDC
differential). Rugged, reliable, and extremely accurate,
the A701-2 is the preferred choice for volcano
monitoring, high-precision geotechnical engineering,
bridge deflection monitoring, precision metrology, radar
platform leveling, and high-accuracy tilt monitoring
applications worldwide.

                             Model A701-2A (High-gain)                 Model A701-2B (Mid-Range)

Angular        High-Gain:    Â±800 Î¼radians (+/-0.046Â°)                                   Â±0.8Â°

Range          Low-Gain:     Â±8000 Î¼radians (Â±0.46Â°)                                     Â±8.0Â°

Scale Factor   High-Gain:    0.1 Î¼radian/mV                                              0.1Â°/V
               Low-Gain::     1 Î¼radian/mV                                                1Â°/V

Non-Linearity  High-Gain:    0.2%                                                        0.2%
               Low-Gain:      2%                                                         1.5%

Resolution                   0.1 Î¼radians                                              1.0 Î¼radians

Repeatability                1 Î¼radians (static)                                       2 Î¼radians (static)

Time Constant                Filter on: 7.5 sec; Filter off 0.5 sec    Filter on: 7.5 sec; Filter off 0.4 sec

Kz Temp Coefficient (deg/C)  Â±3 Î¼radians/Â°C (typical)                         Â±0.001Â°/Â°C (typical)

Ks Temp Coefficient (%/Â°C)                                0.05%/Â°C (typical)

Output                       Â±8VDC (single ended); Â±16VDC (differential)

Channels                                                  X-tilt, Y-tilt, Temperature

Output Impedance                                          270 ohms

Temperature Output           0.1Â°C/mV typical (single ended; 0Â°C = 0mV)

Power                        Â±11 to Â±15 VDC @ +11 and -6mA, 250 mV ripple max, reverse polarity protected

Environmental                -25 to +70Â°C operation; -30 to +100Â°C storage

Dimensions                   6 x 6 x 4 inches (15 x 15 x 10 cm), 3 lb (1.4 kg)

Materials                                                 Anodized and painted aluminum

Cable                        3m (10 ft) multiconductor cable + overall shield, PVC jacket, connectors included

                    Specifications subject to change without notice on account of continued product development

Ordering Code                                             Accessories

                                                          Part No. Description

                                                          70304        Power/signal cable, 10-conductor
                                                          62301        (specify total length on order)
                                                          62304        Female panel receptacle (mates to
                                                                       62302 connector included with tiltmeter)
                                                                       Extra female in-line receptacle
                                                                       (one included with tiltmeter)

                     Jewell Instruments LLC 850 Perimeter Road, Manchester, NH 03103
           sales@jewellinstruments.com â€¢ www.jewellinstruments.com â€¢ Tel (800) 227-5955

                                                                                                                                                          L00209 Rev. B</code></pre>
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