Ametek ORTEC EASY-NIM 928 Suite, Hardware Manual

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PROPERTY OF AMETEK, INC.
–
ORTEC ®
ORTEC
®
EASY-NIM
™
928 Suite 932512A / 0114
32
Dead Time Per Event 2 μs including memory transfer.
Integral Nonlinearity <+0.025% over the top 99% of the dynamic range.
Differential Nonlinearity <±1% over the top 99% of the dynamic range.
Gain Instability <+50 ppm/°C.
Dead-Time Correctio n Software selectable for extended Live-Time correction according to the Gedcke-Hale method
or ZDT Live-Time corrections which monitors the counting rate and adjusts the dead-time for fluctuating counting
rates.
Data Memory 512 kb.
Battery Backup PWB-mounted nominal 3 V lithium coin battery maintains data when power is turned off. Contact
ORTEC for replacement. To replace battery, remove the left-side plate (viewed from the front panel), locate battery on
the lower left corner of the PWB, and substitute new battery. It may be necessary to bend the battery holder down
after removing the old battery to get good contact with the new battery.
4.1.1. Inputs and Outputs
ADC INPUT Accepts positive unipolar, positive gated integrator, or positive leading bipolar analog pulses in the
dynamic range from 0 to +10 V; +12 V maximum; semi-Gaussian-shaped time constants from 0.25 to 30 μs, gated-
integrator-shaped time constants from 3 to 30 μs, or delay-line-shaped with widths >0.25 μs. Z
in
= 1 kΩ dc-coupled. No
internal delay, BNC connector.
ADC GATE Optional TTL input. Computer selectable Coincidence mode, Anticoincidence mode, or Off. Signal must
occur prior to and extend 0.5-μs beyond the peak of the pulse; BNC connector. Z
in
= 1 kΩ.
PUR Pile-up rejection input; accepts TTL signal; signal must occur prior to peak detect. Z
in
= 1 kΩ. BNC connector.
BUSY Busy input used by live-time correction circuits. Accepts TTL signal; signal must occur prior to peak detect.
Z
in
= 1 kΩ. BNC connector.
4.1.2. Presets
Presets can be set to automatically stop MCB acquisitions. In addition, the counters and timers can be configured to
start and stop in synchronization with the MCB.
Real Time/Live Time Multiples of 20 ms.
Region of Interest Peak count/Integral count.
Data Overflow Terminates data collection when any channel exceeds 2
31
–1.
Peak Uncertainty Stops acquisition when the statistical or counting uncertainty of a user-selected net peak reaches
the specified value.
Nuclide MDA Stops data collection when the value of the Minimum Detectable Activity (MDA) for a user-specified
MDA reaches the specified value.