OVP-100 Optical Volume Pulser
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The Miners & Pisani, Inc. OVP-100 Optical Volume Pulser is an optically actuated switch mounted in a polycarbonate housing for easy installation on commercial and industrial gas meters. Meter shaft rotation actuates the switch which can then be used to transmit the metered volume and rate to a remote totalizer or rate indicator. |
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q Transmit Volume Data q Fits all Industrial/Commercial Meters q Standard 100 Pulses/rev. q Available in Other Pulse Values q 1/2" NPT Output Connection for Conduit |
SPECIFICATIONS
Cycles per revolution: 100 Voltage (nominal): 12 VDC Operating Temperature: -40 to 150° F Current: 50 ma Wire Colors: Red: +V Black: common White: signal
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Circuit Description The photodetector circuit consists of two photodiode sensors and a set-reset logic circuit with schmitt trigger inputs driving an open collector NPN transistor with pull-up resistor. The schmitt trigger hysteresis characteristics provide high immunity to noise. The output is TTL compatible and ideal for interfacing with a number of counters or flow rate indicators. |
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Mounting Instructions q The OVP-100 has a universal mounting pattern to facilitate mounting on most commercial and industrial gas meters. 5/16"-18 X 2" screws are supplied for mounting. American Meter Co. mounting holes on meter should be enlarged to standard size by running a 5/16-18 tap down through the existing #18-18 threads. q Remove the existing meter index or instrument from the meter. Place the OVP-100 over the mounting holes and reinstall the original index or instrument using the supplied screws. q The American Meter index drive shaft is not concentric with the mounting bolt circle. Care should be taken to mount the OVP-100 with the wiring access hole to the back of the meter to insure proper alignment of the drive shaft and the driven shaft. |
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Caution q The OVP-100 is designed to operate with high impedence loads and cannot be used to directly operate solenoid actuated devices or similar inductive loads. To operate the OVP-100 in circuits containing inductive loads or at ratings above those listed for the circuit, additional protective devices must be used. q Care must be exercised when installing electrical equipment in locations deemed hazardous by local authorities. When OVP-100 pulsers are installed in such locations, the pulser must be protected by an energy limiting barrier located in a non-hazardous area. |