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Operating Manual
Measurement Specialties, Inc.
32 Journey, Suite 150, Aliso Viejo, CA 92656 USA
Model 140 Inline Amplifier
Measurement Specialties, Inc.
Vibration Sensors Design Center
32 Journey, Suite 150
Aliso Viejo, CA 92656 USA
Tel: 949-716-7324
www.meas-spec.com
vibration@meas-spec.com
www.meas-spec.com
1 of 9
TM
+1 949-716-5377
t&m@meas-spec.com
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Related Manuals for Measurement Computing 140
Summary of Contents for Measurement Computing 140
- Page 1 Operating Manual Model 140 Inline Amplifier Measurement Specialties, Inc. Vibration Sensors Design Center 32 Journey, Suite 150 Aliso Viejo, CA 92656 USA Tel: 949-716-7324 www.meas-spec.com vibration@meas-spec.com Measurement Specialties, Inc. www.meas-spec.com +1 949-716-5377 32 Journey, Suite 150, Aliso Viejo, CA 92656 USA 1 of 9 t&m@meas-spec.com...
- Page 2 Tel: +1 757 766 1500 transportation company. Vibration Sensors Design Center Service Concerns 32 Journey, Suite 150 If a Measurement Specialties, Inc. instrument Aliso Viejo, CA 92656, USA requires service, first contact the nearest Tel: +1 949 716 7324 Measurement Specialties, Inc. representative.
- Page 3 Description The Model 140 is a remote in-line DC amplifier designed to be used with bridge-type mV output transducers. The amplifier features five user selectable gain settings with a gain accuracy of ±0.5% and offers a wide bandwidth to 100kHz. The model 140 offers a patent pending Auto-Zero function that allows the operator to zero the transducer offset voltage to within ±1.5mV.
- Page 4 Physical Configuration The model 140 amplifier is packaged in a compact anodized aluminum housing and includes two Binder connectors for the electrical interface. Two mounting holes are offered for the screw mounting option. The top cover of the model 140 amplifier includes the following.
- Page 5 Operating Manual Mounting Installation The model 140 in-line amplifier can be mounted with various methods. The three preferred methods of mounting are as follows: 1. Screw mounting. - The mounting surface should be flat, clean and free of any residue or foreign material.
- Page 6 Humidity Protection For model 140 amplifier has an ingress protection rating of IP50 (dust protection). It is not designed to be used in any wet environments. For installation in environments that could be subjected to falling water, it is recommended to install a protective shrink sleeving around the housing of the amplifier.
- Page 7 System Installation The model 140 amplifier is designed to be operated from 5-30Vdc excitation and provide a maximum ±2V full scale output (depending on gain setting) with a 2.5V reference voltage. The amplifier is designed to be installed in a benign environment between the piezoresistive sensor and the data acquisition system or recording instrument.
- Page 8 When using the 5Vdc regulated supply (Pin 5), the excitation voltage needs to be derated for a given current draw. The derating curve is illustrated below. For example, a transducer requiring a current of 50mA can not have an excitation voltage applied to the 140 that exceeds 10.5Vdc. 5Vdc Regulated Output Derating Curve CURRENT DRAW (mamps) ...
- Page 9 Operating Manual Auto-Zero Function The model 140 amplifier incorporates a unique Auto-Zero feature. The Auto-Zero can be actuated by two methods. 1. Manually pushing the recessed Auto-Zero button on the top cover for a minimum of two seconds. 2. Remotely grounding the connection to Pin 5 of the Instrumentation output connector for a period of two seconds minimum.