5.The threshold of the spectrum seems to be much higher than expected.

●The input polarity may be wrong. Does the threshold depend on radioactive source and count rate? Try some other input polarity.

●P/Z may not be set correctly. Please check if P/Z is correctly adjusted.

●If the lower cutoff rises by itself, this is most probable caused by the auto threshold circuit which is responsible for detecting the noise level and adjusting the threshold to it. This auto threshold circuit uses the negative part of the amplifier output pulses to estimate noise. If now pole zero is severely maladjusted with strong undershoot, the undershoot is misinterpreted as noise and the threshold is increased, especially at medium and high count rates.

●Please check the detector preamplifier waveform. The decay half time of the signal should be optimum 40 us, but never shorter than 25 us. If it is shorter (as experienced with some NaI's) then it is not possible to adjust P/Z correctly, the time constant of the preamp has to be adjusted instead.

6.The high energy part of the spectrum is reduced or even missing

●Check if the behavior changes if the pile up rejector is switched off. Check the signal from the preamplifier. If the preamplifier signal rise time is slower than 500ns, then there is the danger that regular pulses (especially the large ones) are misinterpreted as pile-up. Try to use another preamplifier or just switch the pile-up rejector off.

●Similar effects can be seen if detector cables longer than 50m are used.

7.Dead time shown is very high although the count rate is low.

●There may be some detectors with excessive electronic noise. Try higher fast and slow threshold (You have to edit a setup file with a text editor for this).

8.Too high background rate with BICRON detectors

●Set Fast Threshold to 600 (You have to edit a setup file with a text editor for this) for gain > 50 (Edit setup file)

9.Everything should be okay, but the MCA gets no signals or just measures strange spectra

●wrong input polarity. Check input polarity, just toggle it for a test.

●The amplification is severely wrong set.

●wrong input mode. Check also ADC input mode

10.Strange error messages

●MCA opened recently, flat cables loose? Connect flat cable again .

11.Very bad resolution in a HPGe spectrum

●Detector worn out or defective. Change and regenerate detector.

●Problems with the high voltage module. Try another high voltage module.

●Check cables. Keep them away from switch mode power supplies and other possible sources of electromagnetic noise.

23

Page 22 Page 24
Page 23
Image 23
Braun MCA166-USB user manual
Page 22 Page 24

MCA166-USB specifications

The Braun MCA166-USB is a compact and versatile charging device designed for modern lifestyles. This product expertly combines functionality with portability, making it an essential accessory for people on the go. One of the key features of the Braun MCA166-USB is its dual charging capability. It comes equipped with multiple USB ports, allowing users to charge various devices simultaneously, from smartphones to tablets. This multi-device functionality eliminates the need for multiple chargers cluttering your workspace or travel bag.

The device supports fast charging technology, which is particularly beneficial for users who need quick power boosts. With a maximum output of 2.4A per port, the Braun MCA166-USB ensures that your devices are energized swiftly, reducing downtime and keeping you connected during busy days. Additionally, the device is compatible with a wide range of charging protocols, offering versatility for different brands and models.

The Braun MCA166-USB features an intelligent charging system that recognizes the connected device and delivers the optimal charging current. This not only enhances the efficiency of charging but also protects your devices from any potential damage caused by overcharging.

Constructed with a sleek and sturdy design, the Braun MCA166-USB is not just about functionality; it is also aesthetically pleasing. Its compact size makes it perfect for portability, easily fitting into a pocket or small bag. The durability of the materials used ensures that the charger withstands the rigors of travel while remaining stylish.

Another highlight of the Braun MCA166-USB is its safety features. It incorporates multiple protection mechanisms, including short-circuit prevention and temperature control, ensuring a safe charging environment for your devices.

In summary, the Braun MCA166-USB emerges as an innovative solution for those seeking a reliable charging option. Its robust features, such as dual USB ports, fast charging capabilities, intelligent charging control, and safety measures, make it an ideal choice for anyone looking to stay powered up while balancing a busy lifestyle. With its sleek design and durable construction, the Braun MCA166-USB undoubtedly stands out as a multifaceted charging device for the modern user.
Top Page Image Contents