MODEL DSRS and DSRB R A T I O T R A N S F O R M E R S ? 100° increment switching to Decade Synchro/Resolver Standards simulate operation over a full 360° (DSRS) ? Selective output ? No warm-up time proportional to the sine of the angle TEGAM’s Decade Synchro/Resolver ? Age or environmental conditions Standards combine the functions of a displayed on the dials and the second have little effect decade synchro standard and a proportional to the cosine. ? Switches good for 100,000 turns In the synchro mode, the sine decade resolver standard into a single ? One-year warranty and cosine outputs are interconnected unit. A front panel switch changes the into a Scott-Tee. This transformer unit from one mode to another. In system tests, the standard may be arrangement produces the three output voltages of an ideal synchro used to introduce accurately known inputs for testing auto pilots, aircraft control transmitter. Most commercially-available indicators, etc. This technique can components may be tested without also be used to check the response of Decade affecting the 2-seconds-of-arc accuracy. a servo loop. In component tests, the Synchro/Resolver Low output impedance unbalance standard may be used to transmit Bridges (DSRB) precise angular data to the test permits severe loading without introducing error. For testing The TEGAM DSRB combines the component. As a synchro standard, functions of a decade synchro bridge the unit may be used to test CDX's, components, either the proportional and a decade resolver bridge into a voltage gradient or the proportional CT's, TDX's, TDR's and TR's. As a single unit. A front panel switch changes resolver standard, the unit may be voltage nulling method may be used. the unit from one mode of operation to If the proportional voltage nulling used to test RD's and RC's. the other. The units are designed for method is used, the TEGAM DSRS The TEGAM DSRS is testing control transmitters, differentials may be adjusted to obtain a null essentially a decade resolver standard (rotors), and torque transmitters as with a Scott-Tee to convert the output instead of the dividing head. In this components or for simulating an incremental control transformer in a to a synchro standard output. As a case, the angular error may be read servo loop. directly from the setting of the control resolver standard, the DSRS Because of the low output generates two isolated outputs: one switches. impedance, the bridge is essentially insensitive to pickup and loading errors. The high input impedance allows an actual load to be connected in parallel with the bridge input, providing a test of the component under actual load conditions. As with all TEGAM bridges, operation consists of setting in the desired angle -no warm-up, no pre-use calibration. The unit is essentially a decade resolver bridge. In the synchro mode, the three-wire input is converted to two voltage signals in a Scott-Tee transformer arrangement. After conversion, the voltage comparator operates in the same manner as in the resolver mode. YOUR GLOBAL SOURCE FOR TEST A Rack Mount Adapter is also AND MEASUREMENT SOLUTIONS available for bridges and standards. MODEL DSRS and DSRB Specifications DSRS DSRB Angular Range 0 to 360 degrees continuous 0 to 400 degrees Angular Accuracy 2 seconds-of-arc at nominal 4 seconds-of-arc at frequency nominal frequency Angular Resolution 0.0001 degree 0.0001 degree (pot) Readout Direct readout in degrees Direct readout in degrees 0.375" high readout numerals 0.375" high readout permits easy reading numerals permits easy reading Nominal Frequency 400 Hz ±5% 400 Hz ±5% Nominal Input Voltage 115 or 26 VRMS 0.35f (f in Hz) or 170 VRMS whichever is less Maximum Stator Output Voltage 115, 90, 26, or 11.8 VRMS N/A Maximum Effective Output Impedance Unbalance at Nominal Frequency 115 and 90 VRMS .05 + j.005 ohms. 26 and 11.8 VRMS .01 + j.001 ohms. 300 -j50 Maximum Input Voltage 0.35f (f in Hz) or 170 VRMS whichever is less 6 Error Voltage Gradient 4.85 x 10- E (max) V/second s ± 1% Input Impedance at Synchro Mode: Nominal Frequency 1 megaohm (approx.) Resolver Mode: 750K ohm (approx) Figure of Merit (Y) Synchro Mode: 100 (min) at Nominal Frequency Resolver Mode: 75 (min) Input and Output Connections 5-way binding posts. 5-way binding posts. Separate synchro and Separate synchro and resolver inputs (on front and resolver inputs (on front and rear) permit simultaneous rear) permit simultaneous connection of both a synchro connection of both a synchro and resolver. Mode switch and resolver. Mode switch determines which is selected. determines which is selected. Isolation and Shielding All inputs and outputs are All inputs and outputs are electrostatically shielded and electrostatically shielded and isolated from each other and isolated from each other and case ground case ground. Dimensions 17"W x 5 1/4"H x 15 3/8"D 17"W x 5 1/4"H x 13 3/8"D. Dimensions With Rack Mount 19"W x 5 1/4 "H x 16 7/8"D 19 "W x 5 1/4"H x 14 7/8"D TEN TEGAM WAY GENEVA, OHIO 44041 YOUR GLOBAL SOURCE FOR TEST 440-466-6100 FX 440-466-6110 AND MEASUREMENT SOLUTIONS www.tegam.com e-mail: sales@tegam.com Specifications subject to change without notice