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The UMo LB 123 offers you:
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The Umo LB 123 is designed for versatile operation as a survey, dose rate and activity meter. Applications include alpha/beta contamination, beta/gamma contamination, activity, dose rate and neutron dose rate, and wipe-tests. Changing function is as easy as changing the probe; the instrument configures itself. Small and portable, it can also be wall mounted. For the radiation protection professional, this one instrument is all that is required.
System Concept The Universal Monitor LB 123 "UMo" is a versatile instrument for contamination, dose rate and activity measurements in radiation protection. It allows the use of application dedicated detectors via a single measurement and display unit. The basic instrument LB 1230 identifies the detector that is connected and adjusts the program firmware accordingly. So, the use of another detector does not require re-setting of detector-specific parameters, high voltage, or measuring units.
A wall bracket incorporating a mains-connection unit permits stationary, continuous operation, e.g. as a local dose rate measuring system or as an exit contamination monitor, as well as operation with rechargeable batteries. However, even in such a configuration the LB 123 can be removed from the wall bracket and used as a portable instrument.
The basic module LB 1230 is capable of storing data and of downloading it via a serial interface either directly to a printer or to a PC. Data-communication is possible when a computer is connected.
The UMo is operated via a 5-button membrane keypad comprising one On/Off button and four softkeys. This ensures clear user guidance via the display even for complex operations and provides a level of convenience and reliability which was hitherto unavailable in portable instruments. The UMo's display is a high-contrast dot-matrix display with background illumination. Universal application of the instrument and programming via softkeys are possible only due to the high flexibility of this display. For example, different units can be selected for the measured values, such as mSv/h or mrem/h.
The LB 123 uses the same detectors as used in the Berthold Model LB 122: Xenon, Butane and P-10 proportional counters. These detectors are directly interchangeable between the LB 122 and the LB 123 via a special adaptor. Three probes, i.e. adaptor-detector combinations, are available.
The calibration factors for 25 radionuclides are stored in the instrument. Several free memory locations are available for the customer to enter his or her own calibration factors. The nuclides with their associated calibration factors are selected via the sub-menu "Select Nuclide".
The display also shows the adjacent nuclides stored in the memory in order to facilitate the setup procedure when scrolling through the nuclide library. The designation of the softkeys in the display provides clear operating instructions.
The proportional counter probe LB 1236 is used for dose and dose rate measurements. It has been tested and approved by the German Office of Standards (PTB). The energy range from 30 keV up allows measurements in the 125I-lab as well as in some parts of Radiology. The dose rate range covers 6 decades from 50nSv/h to 10mSv/h.
In additon to portable use, the instrument may also be used for stationary applications as a room or area dose rate monitor.
Connected to the completely new designed moderator detector LB 6411, the LB 123 UMo becomes a very sensitive neutron dose rate monitor. The high response sensitivity of the LB 6411 of about 3 counts per nSv allows a measuring range from 100 nSv/h to 100 mSv/h. For the first time in a commercial neutron monitor, the energy dependence was adapted to the new conversion factors stipulated by ICRP 60; in the range from 50 keV to 10 MeV neutron energy it is about +/- 40%.
The probe LB 1238 with proportional end-window counter tube allows the simultaneous, separate measurement of the alpha and beta activity of samples with a diameter of up to 25 mm in the lead chamber LB 7431. Furthermore, the activity of filters, wipetests or other sample formats can be verified by direct measurement. When connecting the probe LB 1238 to the basic unit LB 1230, the UMo can either operate in the Ratemeter or Timer/Counter mode. Either cps or Bq are displayed; the calibration factors for alpha and beta activity can be determined and entered by the user depending on the existing sample geometry.
Measurement and Display The software of the UMo supports the basic functions "Contamination Measurement", "Dose Rate Measurement" and "Activity Measurement", depending on which type of probe has been connected. In the Contamination Monitor mode, the software includes about 25 calibration factors for Bq/cm2 or pCi/cm2 calculation. The user is also able to program several of his or her own calibration factors. In the dose rate measurement mode, a program for dose integration may be activated as well. Alarm thresholds for all measured values can be defined via the function "Set Threshold". When these thresholds are exceeded the UMo gives a visual and audible signal.
Automatic Plateau Recording of the Connected Detectors The sub-menu 11 "Take Plateau" allows the automatic plateau recording of the connected detectors without any additional instrumentss.
Data Storage By pressing the "Store" softkey the value currently being displayed is saved in the memory together with the time and a consecutive storage number. The user can pre-program the time interval for the cyclical auto-save function. The data is called or output in the same manner as in the manual save mode.
Printout Via the sub-menu 10 "Call Memory" one can recall stored values into the display, or, when a printer is hooked up, print out the memory data together with a parameter heading. Most serial printers, including battery-operated printers, may be connected.
Counter/Timer Mode This mode enables measurements with counts and time preselection. Depending on the type of probe attached, doserate or contamination measurements are also possible. The actual statistical error of the measurement is live displayed as percentage.
Home Radiation Contact For further information email radiation@berthold.com.au