The right systems, at the right price.

Servo-Tek analog speed indicating systems provide a high-sensitivity indicator, permanent-magnet industrial-type tachometer, and all related mounting hardware and accessories. Every system is assembled and calibrated to produce the highest possible accuracy in a versatile speed-measurement system.

Technical Data

Indicator

The panel meter employs a d'Arsonval taut-band movement that provides fast response, high sensitivity, and excellent repeatability with no frictional error. Case is solvent resistant, and concave crystal minimizes the glare that so often hinders easy reading. Oval escutcheon comes standard in orange, with other colors available for quick identification of readouts on crowded control panels.

Self-Powered

Servo-Tek analog speed indicating systems require no power source.

Accuracy

Each system is calibrated for accuracy of +/- 2% of full scale.

Simplified Wiring

A vinyl-jacketed cable connects generator and indicator. The low-voltage signal does not require conduit. Standard cable length is 15 feet; other lengths are available on special order (and system is calibrated to the cable supplied).

Temperature Compensation

All systems are temperature compensated to maintain accuracies within 0.5% of calibration at 25°C (from -25°C to +75°C).

Available Ranges and Scales

Each system is supplied with indicators calibrated to full scale for standard ranges up to 12,000 rpm: 0-10, 100, 250, 500, 1000, 2000, 3000, 4000, 6000, 8000, 10,000, and 12,000 rpm. Scales are normally marked "RPM," but can be supplied, without extra charge, to read "0 to 100 PERCENT OF FULL SPEED" or "0 to 100 PERCENT OF CAPACITY" Special scales can be marked to customer specifications at a nominal charge.

Diode Protection

All systems include diode protection to prevent damage to indicator.

Suppressed Scale

Available on special order, these indicators allow expanded scale readings. For example, a system reading 0-1000 rpm may be suppressed to start reading at 50% of full scale (500 rpm), thereby doubling the readability. Dual and multi-range indicators are also available.



The standard panel meter offered witht the ST-926 speed indicating system is shown here. Others are available on special order. SA-757A-2 is the standard tach generator. SA-757B-1 is supplied for low-speed systems, with actual tach speed under 50 rpm. Other tachs are also available.