Scope of Supply - Amplifier in cast aluminium enclosure with analog display - Standard (Option U): 2 voltage outputs (direct / filtered) Versions - Option C: 1 current output, 4...20 mA 2 voltage outputs (direct / filtered) - Option N: 1 current output, 0.20 mA 2 voltage outputs (direct / filtered) Additional Accessories - Option E: Enlarged excitation supply 160 mA Product Description Measuring Amplifier MV128 Special Features □ Compact design, ideal for retrofitting and test installations □ 1 channel with connectors for 2 parallel strain gauge sensors □ Integrated strain gauge excitation supply and force display (in % FN) □ 24 V DC power supply □ Power supply and signal outputs galvanically isolated Application The measuring amplifiers MV128 are used preferably in cases when the analog measuring signals of sensors must be amplified close to their location on machines and equipment. A 24 V DC power supply is needed only to operate the amplifier. Due to its compact design and its competitive price, the MV128 is an interesting alternative to more complex amplifiers. All components of the multi-stage amplifier MV128, as well as the voltage regulator for the strain gauge excitation voltage are on a PCB measuring 94 * 46 mm. Two zero adjust potentiometer are available for eliminating off sets (e.g. the roll weight). The desired gain can be adjusted with two potentiometer (coarse and fine). Two voltage outputs with different types of filters are available. The current output (option C and N) can be connected to either one of these outputs. The connection of the power supply is short-circuit protected. The outputs are galvanically isolated from the auxiliary power. HAEHNE Elektronische Messgerate GmbH ■ Heinrich-Hertz-Str.29 ■ D-40699 Erkrath Germany ■ Telefon 0211/9 2591-0 ■ Fax 0211/92591-20 http://www.haehne.de Email: [email protected]

MV128 Technical Data Strain gauge excitation supply Voltage V4 : 10 V Current max.: 60 mA Option E: 160 mA Zero adjust compensation voltage (in relation to voltage input): -25 ... 0 ... +25 mV Amplification Adjustment range: 400...3200 V/ V Factory adjustment:     667 V/ V Temperature range 0...60°C Terminal cross-section Standard enclosure protection: Selector switch S1 dampening characteristics current output: Signal output Voltage ( V2 , V3 ): min. load resistance (V2): min. load resistance (V3): Signal rising time (10...90 %): Current (I1 ) Option C: Option N: Max. load resistance: Auxiliary...