25
1
– left keypad button (“LEFT”);
2
–
upper keypad button (“UP”);
3
–
right keypad button (“RIGHT”);
4
– lower keypad button (“DOWN”).
Figure 7.2 – External view of Display and Control Unit РМ1403’s keypad
The keys are located under the LCD. Each key executes command displayed on LCD above
it.
Use keypad to control Display and Control Unit РМ1403 (Figure 7.2).
BDAB is switched on and ready for operation.
BDAB switches off when the cable is disconnected from Display and Control Unit РМ1403,
or after Display and Control Unit РМ1403 is switched off.
To switch Display and Control Unit РМ1403
: select "Power Off", Figure 7.4 (3), or press
the lower key and wait for the Display and Control Unit РМ1403 to switch off.
7.2
Operation modes
BDAB enables the following operation modes:
measurement of
- radiation flux density;
measurement of β- radiation flux density;
search for
- β- radiation sources;
program operation modes by means of Display and Control Unit РМ1403 or PC.
BDAD automatically enters test mode after switching on. During test it checks BDAB-
Display and Control Unit РМ1403 communication via the RS-485 interface. Charge level of the
Display and Control Unit РМ1403’s accumulators is checked as well. At that the Display and Control
Unit РМ1403’s LCD will indicates a linear scale indicating time left to the test end, Figure 7.3 (1).
BDAB automatically starts calibration after test is completed, Figure 7.3 (2). The analogue
scale shows time spent from the calibration start in relative units. Completely filled scale means end
of the calibration.