5.3 Operation Modes
In order to meet the demands of every user, Polimaster customizes PM1703MO-1
according to the user’s requirements. Please refer to the Delivery options page to learn
about the particular instrument’s operation modes.
• Search Mode;
• Dose Rate Measurement Mode;
• Dose Indication mode.
Use the MODE button to switch between modes.
5.3.1 Search Mode
The Search mode is used for the detection and localization of sources of gamma
radiation. In this mode, depending on the factory pre-set settings of your instrument, the
LCD display will look as follows:
The instrument LCD window displays the current dose rate value in µR/h, mR/h
and an “S” symbol is blinking (SEARCH). Indication of the measured dose rate value
does not exceed one digit after the decimal separator. Switching the scale and unit is
performed automatically.
In the Search mode the instrument detects and localizes sources of gamma
radiation in the DER range of 1 µR/h - 10 mR/h.
The instrument automatically compares the average count rate with the threshold
value (the value based on the background radiation measured during calibration and the
n coefficient set by the user).
In this mode, the instrument is capable of searching for and locating radioactive
sources. When a radioactive source is detected (the point at which the calculated alarm
threshold is exceeded), the instrument will produce a visual and audio and/or vibrating
alarm. As the РМ1703МО-1 moves closer to the radiation source, the frequency of
audio or vibrating signals increases, thus enabling the user to determine the direction
toward the source location.
When the alarm signal frequency reaches the maximum value, it is recommended
to run the background calibration procedure (see section 5.4). During this process it is
important to keep the instrument in the same place if possible. Once the background
calibration is completed, the user may then continue to search for the radiation source.
This procedure may be repeated as many times as necessary until the gamma radiation
source is located.
If the value of the dose rate exceeds the instrument’s upper measuring limit for
radiation (10 R/h), the overload message on the LCD screen will display “-OL-”.
11
To Next Page
Loading...
Need help?
General
