Polimaster PM 1703GNA, Operation Manual, Page: 16 / 28

16
the searching function is additionally included in the measuring mode (see the order chart – attachment
A).
SEARCH MODE "0-9".
In the searching mode "0-9" digits from 0 to 9 are indicated on the LCD display. Compliance of
MED values by
γ
- channel and digits indicated on the indicator LCD is shown in the table.
Indicated figure 0 1 2 3 4 5 6 7 8 9
Range of
indicated MEG,
mc
З
v/h
From
background
to 3,6
≥
3,6
< 7,2
≥
7,2
< 10,8
≥
10,8
< 14,4
≥
14,4
< 18,0
≥
18,0
< 21,6
≥
21,6
< 25,2
≥
25,2
< 28,8
≥
28,8
< 32,4
≥
32,4
< 36,0
The analogue scale is in parallel filled in. The number of illuminating segments of the analogue scale
is proportional to the digit induced on the LCD.
In the searching mode "0-9" operation of the indicator is carried out in the following
thresholds:
1) The searching threshold by MED is set in the mode of settings from the front
panel of the indicator, as well as in the mode of communication with a PC by the user-administrator. The
range of threshold setting is equal to 15 – 7777
µ
R/h (0.15-77.77
µ
Sv/h), recommended - 30
µ
R/h (0,3
µ Sv/h)). The preset searching threshold exceeding by MED is accompanied with light and sound signaling.
Mechanical vibrations inside the device (casing trembling) are felt with the switched on vibrating indicator
instead of sound signals. Frequency of signals increases by device approaching to the gamma radiation
source.
2) The safety threshold – the 2
nd
threshold by MED
, is only set in the mode of communication
with a PC by the user administrator. The range of threshold setting is equal to 10 – 7000
µ
R/h (0.1-
70 µ Sv/h), the recommended one – 3mR/h (30 µ Sv/h)). The light, sound and/or vibrating signals are
provided in case of exceeding the safety threshold. Being so, single tone periodical signals are provided with
the permanent interval and duration of 1 s what makes it possible for the user to differentiate the indication
in case of exceeding the searching threshold by MED from the safety threshold.
Compliance of speed values by neutron
2 1
channel and digits indicated on the device LCD
is shown in the following table.
Indicated figure 0 1 2 3 4 5 6 7 8 9
Count speed From
backg
round
to 2
≥
2
<
4
≥
4
<
6
≥
6
<
8
≥
8
<
10
≥
10
<
17
≥
17
<
24
≥
24
<
31
≥
31
<
41
≥
41
The fixed threshold of counting neutrons for the searching mode "0-9" (the range of threshold setting
is equal to 1.0 – 99.0 s
-1
, recommended – 1.5 s
-1
) is set in the mode of settings from the front indicator
panel, as well as in the communication mode with a PC by the user-administrator.
GAMMA REGISTRATION MODE (only for
РМ
1703
М
-
О
1)
In this mode in the upper line of LCD a γ is shown and the quantity of accumulated count impulses is
indicated in the form of:
ХХХХ
– in case of indication by the value of 9999 impulses
Х . ХЕХ – in case of indication above 9999 impulses, wherein Х is any figure
from 0 to 9,
ЕХ
is 10
х
.
Time of accumulation of impulses in hours is indicated in the lower LCD line.
2
РМ
1703GNO,
РМ
1703GNA,
РМ
1703GNB