1621M OPERATING MANUAL
palmRAD Model
h o s p i t a l s • nuclear power plants • la bs • HA ZM AT • w as te p rocessing • hos p i ta ls • nuclear po we r plants • labs • HA ZMAT • w as te processing • hospitals • nuclear powe r plants • labs • HA ZMAT • w as te processing •
h o s pi ta l s
nuclear power p lants
labs
HAZMAT
waste process in g
This manual is intended to describe the design, operation and use
of the X-ray and gamma radiation personal dosimeter 1621M
(hereinafter referred to as the device or dosimeter).
(hereinafter referred to as the device or dosimeter).
The Operating Manual includes the general description,
speci cations of the dosimeter, as well as other information
necessary for the proper operation of the dosimeter and
understanding of device capabilities.
Changes may be made to the instrument electrical scheme,
construction, design and software that do not in uence
the speci cations and, therefore, may be not speci ed in
this manual.
palmRAD Model
• hospitals • nuclear power p lants • labs • H AZ MAT • wa st e processing •
DESCRIPTION & OPERATION OF THE DOSIMETER
The 1621M X-ray and gamma radiation
dosimeter is designed to provide:
2
Operating Conditions:
o
C
o
C
within the full energy range
One AA alkaline battery
Weight (with battery)
Additional functions
4
6
year of production in number indication mode, IR communication
4.
Time of averaging DER values (in seconds) in DER indication mode,
of DE accumulation time in DE indication mode;
The LIGHT/SET button (the light/setting) (controls LCD backlight, PC
The MODE button for selecting the dosimeter’s indication mode
Audible alarm outlet;
The dosimeter’s operating algorithm ensures continuity of the
The IR-communication channel allows an exchange of information
with a PC.
The dosimeter has an internal non-volatile memory for information
A direction of calibration and the detector effective center relative to
which the factory calibration is performed are placed at a 15
o
The total surface density of the walls surrounding the detector is 1 g/cm
which provide shielding from background beta radiation to the detector.
8
When you receive the device after purchase please check the delivery kit
that the positive (“+”) end of the battery is inserted rst;
One minute after inserting the battery the dosimeter is ready for use.
Attention! If the device is expected to be used under conditions when the dose
Photon radiation DER indication mode;
Photon radiation DE indication mode;
Number indication mode (“blind dosimeter”);
Mode of data transmission to PC;
Set mode;
Partial or critical battery discharge indication mode;
Audible alarm mode when exceeding
preset DE or DER thresholds
The following values will be stored in the dosimeter s non-volatile memory
Accumulated dose (DE);
DE accumulation time;
DE and DER accumulation history;
The preset DER and DE thresholds.
When using the dosimeter in a temperature range from -40 up to -20
o
C
o
C
, the LCD operates
The dosimeter performs continuous DER and DE measurement, DE
10
output of the coef cient of variation values - Off
output of DER values averaging - Off
Thresholds setting enable:
Off
Audible alarm:
Off
Output of DE accumulation time values in
Output of DE accumulation time values in hours - On
Output of values of time remaining for staying
Thresholds setting enable - On
Audible alarm - On
Month of the dosimeter’s production;
Year of the dosimeter’s production;
Audible alarm:
On
on by a successive pressing of the MODE button (Figure 2.1, Item 6).
The dosimeter allows for switching all the above-mentioned indication modes on and
off. Change of the con guration is performed in data transmission to PC mode.
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DER (µR/h, mR/h, R/h);
DER on the analog scale in a logarithmic gauge (seven segments);
Coef 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).
DE (µR, mR, R);
DE accumulation time.
The rst method
(recommended). In the beginning of measurement the
The second method.
The dose value in the beginning of the period of
14
Auxiliary set mode (Figures 2.2 and 2.3) is meant for veri cation and (or)
Attention! To enter the “set” mode press and hold the LIGHT/SET button for about 5
seconds until the parameter to be set is ashing.
To choose the parameter, press and release the LIGHT/SET button.
This procedure can be performed in the DER (DE) measurement mode as well
The dosimeter’s number on a display (Figure 2.1, Item 2);
Year (Figure 2.1, Item 4) and month (Figure 2.1, Item 3) of production.
The dosimeter allows storage and transmission to PC of DE history
without IR adapter (internal or external).
The dosimeter performs data transmission to PC under the software
with IrDA interface.
Minimum computer system requirements:
Pentium 100
32 b RAM
monitor resolution 800 x 600
IR adapter (internal or external)
OS Windows 98/2000
printer
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To use the dosimeter in data transmission to PC mode:
Values of the preset DE and DER thresholds;
The dosimeter checks battery discharge once every 10 minutes.
The battery should be replaced!
The battery must be replaced!
(see section 3.3).
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After the battery is replaced, the LCD will display all segments,
20
4. TROUBLESHOOTING
The list of possible problems and their solutions are speci ed in Table 4.1
ttention! When the Er1-Er7 message appears, press any button. When the error message appears for the
second time (approx. 15 min) the dosimeter is not to be used.
Problem
The LCD indicates “bAt”
The device does not respond
to pressing a button. the LCD
Microprocessor error condition
Possible Cause
Solution
This warranty is void if the unit is repaired or altered by others than those
were not satis ed.
22
24
Anisotropy of the device for each energy does not exceed values (in %)
0.059
0.662
0
0
15
±5
30
±10
45
±20
60
±40
±5
±10
±20
±40
Angle of the detection
of the graduation
Anisotropy
0.059
0.662
0
0
15
±5
30
±10
45
±20
60
±40
±5
±10
±20
±40
Angle of the detection
of the graduation
Anisotropy
Table 1.1
Table 1.2
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