Dual channel high speed recorder TR 722

The introduction from the Operating and service manual.

The TR722 is a completely self-contained two channel recorder, designed to record out to 125 cps. It writes by means of the time-proven Pressure-Thermal method which no inks or fluids, as it employs rugged, heated writing styli and heat sensitive chart paper.

The TR722 is light and rugged. It has been designed an built to withstad heavy, continuous use, and emplois te highest quality components obtainable.

With its 4 electrically-selected chart speeds from 1 to 100 mm/sec.,the TR722 lends itself to applications such as telephone relay testing, pulse-command networks, telemetry readout, medical recording and many other aplications when used with Techni-Rite or other commercially available Preamplifiers, including Strain Gage Applications, acceleration, and many other parameters 

Specifications from the Operating and service manual.

Number of Channels                       2
Frequency Response                      DC to 125 cps
Rise time                                       5 milliseconds,, 10% to 90% of full scale
Voltage Sensitivity                         10 millivolts per chart division
Current Sensitivity                          10 microamperes per chart division
Input configuration                          Single-ended and floating
Voltage input impedance                 500 K ohms
Current input impedance                 1000 ohms
Stability                                         Less than1/3 chart line per 8 hours
Gain control                                   Continuous, 20:1 range
Attenuator                                     Nine position, 500:1 range
Position control                              Possitions stylus to any point on the chart
Trace width control                         Automatic with chart speed or manual
Linearity                                        Within 0.5 chart divisions

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