1 OCT 1986
COMMERCIAL ITEM DESCRIPTION
FOUR CHANNEL RECORDER
The General Services Administration has authorized the use of this Commercial Item Description.
SCOPE. This Commercial Item Description (CID) specifies a portable four 50MM channel recorder which features a four-channel DC and amplifier range of 50MV to 5.00V, full scale with a capability of a maximum common mode voltage of 500VDC. The recorder picks up test signals from a function generator that monitors three cylinder hydraulic fluid flows. The fourth channel monitors the changes between the three test signals. This system shall be known as a four channel recorder.
MIL-M-7298 Manual Technical Commercial Equipment.
MIL-T-28800 Test Equipment for use with Electrical and Electronics Equipment General Specification for.
MIL-M-38797 Manual Technical, Operation Instructions and Maintenance Instructions (for Various Types of Equipment).
1. Performance requirements of the four channel Oscillographic Recorder.
a. Four channel recorder. The four channel recorder monitors four input test signals (5 volt full scale) with a 115VAC line voltage at a frequency-range of 50 to 400HZ.
b. Precision. The servo control penmoter should enforce 99.65% linearity over the entire channel, regardless of the channel width. Chart speed accuracy is + 0.25% from 15 to 35 degrees celsius temperature range and is independent of line frequency from 50 to 400HZ.
c. Chart speed control. Must permit fixed or continuous variable operation of chart speed from 100% to 40% of selected speeds. The variable control is for reducing paper consumption or improving recording readability. Selections of the six calibrated speeds are by front-panel pushbuttons, or remote via TTL, or contact closure. The speed selections are 5, 10, 25, 50, 100, or 200 mm/see and a divide-by-100 speed to reduce chart speed to 1/100th of the value selected by pushbutton. The external speed selection is achieved by applying an external pulse with a frequency ranging from 0 to 20 KHZ which corresponds with the resulting chart speed of 0 to 250 mm per second. Using this frequency range, the incremental chart drive response to the pulse at 30 microsecond with 10 microsecond minimum duration.
DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited.
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