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Model 500-1

Pulse Generator

Part Number: 48-1166

The Ludlum Model 500-1 Pulse Generator (Pulser) provides the functions necessary for use in calibrating Ludlum instruments, as well as many other scaler/ratemeter instruments. The adjustable output pulse rate is displayed on a three-digit LED readout. Potentiometers (both coarse and fine controls) and a multiplier switch provide rates from 1 to 9.9 x 10⁶ counts per minute (cpm). Pulse amplitude is controlled by a multiplier switch and a LO/HI potentiometer, while pulse polarity is chosen by a selector switch. Amplitude may be varied between 0 and a negative or positive 5 volts, displayed on an analog meter. The high voltage of the instrument under test is displayed on a four-digit LED display.

Specifications
Documents

Specifications
Documents

Specifications

Indicated Use	Pulse calibration of radiation detection instruments
High Voltage	Display: Digital Readout Display Type: Four digit LED Total Range: 0 to 1999 Vdc Linearity: Reading within 5% of true value
Pulse Rate	Display: Digital readout, three digit LED display reads from 10 to 990 counts Total Range: 1 to 9,900,000 cpm Accuracy: Within 2% of true value Controls: Fine and coarse adjustment knobs Multiplier Switch: x0.1, x1, x10, x100, x1k, x10k
Pulse Amplitude	Display: Analog readout Meter Dial: 6.4 cm (2.5 in.) arc, 1 mA movement Scale: 0 to 5 Total Range: 0 mV to 5 Vdc (positive and negative polarity selectable) Accuracy: Within 10% of true value Controls: LO/HI potentiometer Range Switch: 0 to 5 mV, 0 to 50 mV, 0 to 500 mV, 0 to 5 V
Pulse Polarity	Switch: Positive/Negative selector switch Negative Pulse: Pulse width typically 7.0 µs Leading Edge: 0.3 µs Pulse Width: 1.7 µs Trailing Edge: 5.0 µs Positive Pulse: Pulse width less than 2.25 µs
Pulse Output	Standard “C” type connector, a “C” type cable is supplied with the instrument
Power	95 to 135 Vac (178 to 240 Vdc available), 50-60 Hz front panel on/off switch with accompanying red LED indicator
Size (H x W x L)	21.6 x 29.2 x 24.1 cm (8.5 x 11.5 x 9.5 in.)
Weight	4.1 kg (9 lb)