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9349 Log/Lin Count Rate Meter

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Brief description:Count rate measurement for photon or ion beams 106 counts/second full scale Linear or logarithmic operation Fast negative NIM input ORTEC Model 9349 Log/Lin Count Rate Meter is designed for photon or ion beam applications and has two modes of operation: linear and logarithmic

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Count rate measurement for photon or ion beams
106 counts/second full scale
Linear or logarithmic operations
Fast negative NIM input

The ORTEC Model 9349 Log/Lin Count Rate Meter is designed for photon or ion beam applications and is available in two modes of operation: linear and logarithmic. The linear mode has 11 full-scale ranges from 10 to 106 counts/second in steps of 1-3-10. The 5-digit logarithmic mode covers the range from 10 to 106 counts/second in a single range. These options allow measurements of low, medium, or high steady-state pulse repetition frequencies, or monitoring of frequencies that vary over a wide range.

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- 9349 Brochure
- 9349 Brochure (A4)
- 9349 Manual
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The input signal for the Type 9349 is usually obtained from a discriminator with a NIM standard fast negative logic output signal.

Due to the longer effective scale and greater accuracy inherent in the 240° movement, the round front panel instrumentation provides excellent readability in both modes.

Provides zero point rejection for any linear range up to 100%. By adjusting this control, any relatively constant count rate background can be subtracted from the data. Additionally, suppressing the zero point enables observing frequencies beyond the nominal full-scale limits with greater accuracy than can be obtained by switching to a higher range. 7 linear and 2 logarithmic time constant switches help accurately read the frequency of the input signal.

In addition to front panel instrumentation, it has outputs for current and voltage recorders, as well as a high-level voltage output for control or monitoring applications.

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Performance

Linear

range	from10Arrive10⁶count/seconds11full-scale range, with a step size of1-3-10。
dead time	in10⁶within the range<100 ns; in Gundam3×10⁴Within the range, the average pulse interval<0.3%; in10⁵and3×10⁵Within the range ≤1％。
Rated overload	forX300overload or10⁷count/seconds to maintain full-scale output, whichever is less.
temperature instability	≤±0.05%/°C。
nonlinear	in10Arrive3×10⁴count/Within seconds ≤±0.15%; in10⁵to10⁶count/Within seconds ≤±1.5％。
time constant	7a selectable time constant,0.03to30seconds, the step size is1-3-10。
Zero point suppression	full scale0to100%, non-linearity ≤ ±0.25％。

Logarithm

range	10to10⁶count/seconds5Bit decimal range.
temperature instability	per°C≤±0.25% full scale.
Analog output error	≤±2.5% full scale.
standard deviation	Logarithmic short time constant ~15%; logarithmic long time constant ~5％。
Slew rate	Dependent on input rate; logarithmic short time constants respond faster to any rate change than long time constants10times.

control

range	12Bit switches select full-scale range and linear or logarithmic mode; linear range is0to10count/seconds - 0to10⁶count/seconds, the step size is1-3-10;The logarithmic range is10Arrive10⁶count/seconds.
time constant	9bit switch selects the time constant for the integrating network; all linear ranges are0.03to30 s, the step size is1-3-10;Logarithmic range is short and long.
Zero point suppression	10turn precision potentiometer for suppressing any0Arrive100% zero reference level over linear range; same full-scale range valid above preselected zero reference level.

Input

Input

rear panelBNCConnector acceptable-600to-1800 mVwithin rangeNIMStandard fast negative logic signal.Z_in= 50 Ω. The minimum pulse width is4 ns FWHM。

Output

Panel instrument	Deflect8.9cm (3.5inches)240°Circular motion; accuracy is full scale2％；3tick marks;0-1and0-3for linear range as well as5decimal10-10⁶Used for logarithmic ranges.
Analog output	on the rear panelBNCConnector provided0to10 VFull scale, DC coupled,100Ω output impedance.
Recorder output	Binding post connectors on rear panel: • 100 mV provide100 mVFull-scale voltage output; DC coupled,100Ω output impedance. • 1 mA provide1 mAFull-scale current output; DC coupled,10kΩ output impedance.

electrical and mechanical

Required power supply	+24 V, 50 mA; –24 V, 35 mA; +12 V, 30 mA; –12 V, 45 mA。
weight	Net weight1.5Kilogram (3.5pounds).Shipping weight2.5Kilogram (5.5pounds).
Size	NIMStandard double wide module,6.90 X 22.13cm (2.70 X 8.714inches), consistent withDOE/ER-0457Trequirements.

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Model

Description

9349

Log/Lincounting rate meter

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Model	Description
9349	Log/Lincounting rate meter

9349 Log/Lin Count Rate Meter

9349 Log/Lin Count Rate Meter

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