Engineering units...user selected scaling factors can convert the pulses into engineering units for display.
Interval storage...the last forty-eight measurement intervals can be time tracked and recalled for display. Interval timing can be set by the user in hours or minutes. The user can select to measure either total pulse count or the peak fixed window demand for each interval, i.e. display the peak fifteen minute demand for each of the last forty-eight twenty four hour intervals.
Switch selectable demands intervals...demand intervals from one to ninety minutes are switch selectable in one minute steps.
Switch selectable operation modes...any three of the following four measurements can be selected for display: total count, present demand, fixed window demand, and the last forty-eight measurement intervals.
Switch selectable output relay...one output relay can be switched to provide form C contact transitions that echo the input pulses or a contact transition for each new measurement interval.
Synchronizing capability...can be driven by external form C or A contacts for interval slaving with a master unit.
Backup memory power...the standard design uses a capacitor to provide carry-over power for greater than a four day period.
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Bi-color LED's...monitor the state of the pulse input channel and the output relay.
Line frequency time base...the measurement intervals are derived from the power line frequency.
Smart display...eight digits are provided for the total pulse count, six digits are utilized for the demand readings and five digits are provided for the forty-eight measurement intervals. When the unit displays demand readings, the eighth or left-most digit will display a letter code to indicate the type of demand under display, i.e., present or fixed window. The fixed window interval generation, internal or externally slaved, is also indicated on the display. In the forty-eight measurement intervals mode, the two left-most digits will indicate which of the forty-eight intervals is being displayed.
Diagnostics...three different test routines are provided to ensure proper operation. The unit will verify proper operation of the EPROM program, RAM, and LCD display system.
Surge protected output contacts...RC networks are applied in parallel to output contacts to control the rate of voltage rise across the contacts during circuit opening. The standard design will provide contact protection up to 300 volts and 0 to 100 MA.
Recorder upgrade...the Model 100D will fit inside of existing PD-57 paper tape demand recorder cases.
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