Features

• Eight Ranges, from 10 to 25 x 106 counts per second
• Zero Suppression potentiometer covers 25% of range selected
• Fixed Time Constants on four ranges, 3 seconds on 10 and 100 counts per second ranges and 1.5 seconds on 100 and 10 000 counts per second ranges
• Digital rate measurement technique provides identically accurate rate determinations for each position of the range switch
• Large 7 cm (2.75 in.) meter

Description

The Model 2081 Linear Ratemeter is an extremely stable averaging ratemeter which accepts positive or negative input signals (selected internally) at its front or rear panel connectors, scales them for the selected Range, averages the counts and displays the averaged count on an easy-to-read front panel linear meter.

The Range switch offers seven full scale ranges, from 10 to 10 million counts per second, plus an eighth range (1/4 scale) of 25 million counts per second. If the input count rate exceeds the selected Range by 28%, the meter will indicate full scale for up to five seconds, then the unit will begin averaging the input signal again.

The averaging time is 10 seconds on the 10 count/second range and 1 second on the other ranges. Zero suppression of 25% of range is provided by a 22-turn screwdriver-adjusted control on the front panel.

The Model 2081 has a rear panel (0 to +5 V) recorder output with better than ±0.3% nonlinearity. The 7 cm (2.75 in.) front panel antiparallax meter has less than 2% nonlinearity.