PRODUCT DATA DC Response Accelerometers — Types 4570, 4571, 4572, 4573, 4574, and 4575 The DC Response Accelerometers are designed to measure low-frequency vibration down to DC. The gasdamped sensing element offers a wide dynamic range and very stable frequency response even after subjection to high shock levels. The accelerometer has built- in conditioning, where the sensing element and electronics are shielded, sealed and insulated from the housing. D-versions are available offering high thermal stability from –55 to +121°C. USES AND FEATURES FEATURES • High temperature stability • Hermetically sealed • 2 to 500 g full scale • 10000 g shock survivability • Low power consumption USES • Low-frequency, motion and tilt measurements • Flight testing • Road load testing • Transportation • Modal analysis Characteristics The DC response accelerometers are gas-damped, resulting in minimal influence of thermal changes. These low-impedance units operate with a supply voltage from 8 to 24 V DC, and a supply current of 5 mA. The ±2 volt differential output is DC-coupled at a bias voltage of 2.5 V DC, and a 2.5 V reference is built-in for differential measurements. The units can be used with either differential or single-ended input. Fig. 1 Typical frequency response Typical Frequency Response Typical Frequency Response for 4570 Amplitude Phase

The units feature an internal temperature compensation (updated at intervals of 40 ms) that minimises thermal zero shift and sensitivity shift over a wide temperature range. All types will operate from –55° to +121°C. For standard versions, the thermal zero shift and thermal sensitivity shift are specified in the temperature range –20° to +85°C. For high thermal stability the D-versions are compensated from –55° to +121°C. Calibration The transducers are individually calibrated providing a 1600-point, high-resolution calibration in the specified frequency range (magnitude and phase), ultimately...

Mounting Options Clip Mounting For very flexible and easy mounting, the accelerometers can be bolted to Adaptor for Clip Mounting UA-20831 (see Fig. 4), and applied without any change in frequency response. The adaptor has slots that enable the use of mounting clips, such as Large Mounting Clip UA-1408; Mounting Clip with Thick Base UA-1474, which can be filed down to suit the mounting surface; as well as Swivel Base UA-1473 and Spirit Level UA-1480, which make it easy to align the accelerometer to retain the coordinate system used. Finally, a high-temperature mounting clip, such as UA-1563,...

Direct from accelerometer to conditioning/data acquisition Customer Specific Direct from accelerometer to conditioning/data acquisition or extension via standard serial cable Endevco Type 136 Other -001 suffix Male 7-pin LEMO termination of integral cable AO-0700-D-100 (other lengths from 1 to 180 m) AO-0414-D-100 (other lengths from 1 to 180 m) Direct from accelerometer to conditioning/data acquisition PULSE NEXUS Other The DC Response accelerometers are available with integral cables with three different terminations dependent on the type number: • Standard accelerometers, including D-versions,...

DYNAMIC CHARACTERISTICS All values are typical at 25°C (77°F) unless measurement uncertainty is specified Common Specfications ELECTRICAL CHARACTERISTICS Bias Voltage (zero g output): 2.5 ±0.05 V DC Full-scale Output Voltage: ±2Vpk Output Impedance: <100 Q Ref. Voltage: 2.5 V ±0.005V Output Impedance: (Vref) 1 kQ Supply Voltage: 8 to 24 V DC Current: 5 mA Insulation Resistance (case to shield): >100 MQ PHYSICAL CHARACTERISTICS Weight (excl. cable): 8g (0.282 oz.) Case Material: Anodized aluminium Jacket Material: TPE cable Length of Integral Cable: 3 m (9.8 ft.) Connector: Dependent on version: •...

All types include the following accessories: • Carrying box • Calibration chart • 2 x 4-40 UNC socket head cap screw (length: 11 mm) with washer • QA-0013: Hex wrench Optional Accessories AO-0414 Extension cable 7-pin LEMO 1 B male to female connector AO-0700 Extension cable 7-pin LEMO 1 B to 6-pin LEMO 0B connector DV-0460 Big Calibration Clip UA-1408 Set of 100 Mounting Clips UA-1473 Set of 100 Swivel Bases UA-1474 Set of 100 Mounting Clips, Thick Base UA-1480 Spirit Level for Swivel Bases UA-2079 Triaxial Mounting Block UA-2080 25 pcs of 4-40 UNC socket head cap...