BNC 1621M - Manual (Page 14)

2.4.3 DER Indication Mode
In the DER mode (Figure 2.1) the following values appear on the LCD:
•
DER (µR/h, mR/h, R/h);
•
DER on the analog scale in a logarithmic gauge (seven segments);
•
Coeffi cient of variation in percents;
•
Averaging time of DER values (Range of the averaging time
indication is from 1 up to 2999 s. If the averaging time exceeds
2999 s, the symbols - - - appear on the LCD).
If the measured DER value is above the upper limit of the DER indication
range, the LCD will show the overload symbol “OL” and a noncontinuous
audible signal will sound.
In the DER mode the collected statistics of DER measurement can be
cleared and measurement reactivated by simultaneously pressing the
LIGHT + MODE buttons.
2.4.4 DE Indication Mode
In the DE mode (Figure 2.1) the following values are indicated on the LCD:
•
DE (µR, mR, R);
•
DE accumulation time.
DE and DE accumulation time can be reset in the set mode by
simultaneously pressing the LIGHT+MODE buttons (Figure 2.2).
In data transmission to PC mode it is possible to set an inhibit for DE
reset using the buttons. There are two methods of measurement of the DE
accumulated over a certain period of time.
The fi rst method (recommended). In the beginning of measurement the
DE should be reset using the keys or the PC and the program “System
of date collection and processing for the 1621 device.” Then the dose
displayed at the end of the period will be the dose accumulated over the
period of measurement.
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