9349 Log/Lin Ratemeter

 Specifications

PERFORMANCE

LINEAR RANGES 11 ranges from 10 to 10⁶ counts/s full scale in 1-3-10 steps.

DEAD TIME <100 ns on the 10⁶ range; <0.3% of average pulse spacing up to the 3 X 10⁴ range; £1% on the 10⁵ and 3 X 10⁵ ranges.

RATED OVERLOAD Maintains full-scale output for X300 overload or 10⁷ counts/s, whichever is smaller.

TEMPERATURE INSTABILITY £±0.05%/°C.

NONLINEARITY £±0.15% from 10 to 3 X 10⁴ counts/s range; £±1.5% from 10⁵ – 10⁶ counts/s.

TIME CONSTANTS 7 selectable time constants, 0.03 to 30 s in 1-3-10 steps.

ZERO SUPPRESSION 0 to 100% of full scale, nonlinearity £±0.25%.

LOGARITHMIC RANGE One 5-decade range for 10 to 10⁶ counts/s.

TEMPERATURE INSTABILITY £±0.25% of full scale per °C.

ANALOG OUTPUT ERROR £±2.5% of full scale.

STANDARD DEVIATION ~15% with Log Short time constant; ~5% with Log Long time constants.

SLEWING RATE Dependent upon input rate; for any rate change, Log Short time constant provides 10 times faster response than Log Long time constant.

CONTROLS

RANGE 12-position switch selects the full-scale range and either linear or logarithmic mode; linear ranges are 0–10 counts/s through 0–10⁶ counts/s in 1-3-10 steps; log range is 10–10⁶ counts/s.

TIME CONSTANT 9-position switch selects the time constant for the integrating network; 0.03 to 30 s in a 1-3-10 series for all linear ranges; Short and Long for the log range.

ZERO SUPPRESSION 10-turn precision potentiometer to suppress the zero-reference level for any linear range from 0 to 100%; the same full-scale span is effective above the preselected zero-reference level.

INPUTS

INPUT Rear-panel BNC connector accepts NIM-standard, fast-negative logic signals, –600 to –1800 mV. Z_in = 50 W. Minimum pulse width is 4 ns FWHM.

OUTPUTS

PANEL METER 240° circular movement with 8.9 cm (3.5 in.) deflection; accuracy, 2% of full scale; 3 scale markings; 0–1 and 0–3 for linear ranges and 10–10⁶ in 5 decades for log range.

ANALOG OUTPUTS BNC connector on rear panel provides 0 to 10 V full scale, dc-coupled with 100-W output impedance.

RECORDER OUTPUTS Binding post connectors on rear panel:
100 mV Provides voltage output with 100 mV full scale; dc-coupled with 100-W output impedance.
1 mA Provides current output of 1 mA full scale; dc-coupled with 10 kW output impedance.

ELECTRICAL AND MECHANICAL

POWER REQUIRED +24 V, 50 mA; –24 V, 35 mA; +12 V, 30 mA; –12 V, 45 mA.

WEIGHT
Net 1.5 kg (3.5 lb).
Shipping 2.5 kg (5.5 lb).

DIMENSIONS NIM-standard double-width module 6.90 X 22.13 cm (2.70 X 8.714 in.) per DOE/ER-0457T.

ORDERING INFORMATION