Nuclear Associates
06-007
06-611
06-622
06-638
06-686
Direct Reading Pocket Dosimeters
(Gamma and X-ray
)
Operators Manual
February 2005
Manual No. 06-XXX-1 Rev. 2
©2004, 2005 Fluke Corporation, All rights reserved. Printed in U.S.A.
All product names are trademarks of their respective companies
Fluke Biomedical
Radiation Management Services
6045 Cochran Road
Cleveland, Ohio 44139
440.498.2564
120 Andrews Road
Hicksville, New York 11801
516.870.0100
www.flukebiomedical.com/rms
Table Of Contents
Section 1: General Information ...................................................................... 1-1
1.1 Product Description ..................................................................................... 1-1
Section 2: Operation ..................................................................................... 2-1
2.1 Introduction .................................................................................................. 2-1
Section 3: Maintenance ................................................................................. 3-1
3.1 Preventative Maintenance ........................................................................... 3-1
i
General Information
Product Description
Section 1
General Information
1.1 Product Description
A dosimeter is a pocketsize, quartz-fiber electroscope with an ion chamber for detecting an indication
integrated exposure to gamma and x-radiation. It has a thin wall that permits the penetration and
detection of radiation.
Accumulated radiation is read directly on an internal calibrated scale. A Dosimeter Charger (model 06-
912) is required in order to return the dosimeter to zero after each exposure period.
1
1-1
Nuclear Associates 06-007,06-611,06-622,06-638,06-686
Operators Manual
Operation
Introduction
Section 2
Operation
2.1 Introduction
One end of the dosimeter contains an optical eyepiece; the opposite end is sealed by a bellows that
carries the insulated, glass-sealed charging pin. The instrument is charged by pressing the charging pin
onto the receptacle on the charger.
When the charging pin is pressed into the charging socket on the charger, the pin contacts the
electrometer frame. Sufficient voltage is applied to charge up the capacitor and to set the fiber to zero.
The charger should be used to recharge the dosimeter to zero before each use of the instrument.
a. Adjust the “down-scale/up-scale” control on the charger, while observing the calibrated retile, until a
zero reading is indicated.
b. At times, a transient “kick” is experienced when zeroing the dosimeter. The charging contact of the
charger automatically compensates for the kick when the dosimeter is withdrawn slowly from the
contact. You can see this effect by holding the dosimeter on the charging contact while looking into
the instrument. Withdraw the instrument slowly. You will note that just before the light turns off, the
hairline will shift. With a little practice the hairline can be made to shift so that its final position
coincides with the zero line. Optimum performance is obtained when electrostatic kick is
compensated for in this manner. The hairline will remain on or near the zero position for long
periods when not exposed to radiation.
c. When resetting the dosimeter to zero, the fiber may disappear and remain hidden. To release the
fiber, tap the charger-contact end of the dosimeter a few times on a hard surface (the dosimeter
should be perpendicular to the surface being struck). This will usually free the fiber and permit a
normal recharging operation.
2
At the end of the designated period of exposure, the accumulated amount of radiation can be read
directly from the scale by looking through the eyepiece while pointing the dosimeter towards an external
light source.
2-1
Nuclear Associates 06-007,06-611,06-622,06-638,06-686
Operators Manual
Maintenance
Preventive Maintenance
3
Section 3
Maintenance
3.1 Preventive Maintenance
Dosimeters are extremely sensitive instruments. Although they are constructed for rugged use, they
should receive the same care as a wristwatch. Since dosimeters are hermetically sealed at the factory,
they cannot be repaired or adjusted in the field. Therefore, if instrument malfunctioning is experienced,
the instrument should be returned to the factory or your dealer. Dosimeters may be maintained in
prescribed operating condition simply by cleaning the eyepiece lens and the charging switch insulator with
clean water and a cloth that is free of lint and grit. Make sure the charging switch insulator is absolutely
free of lint and moisture at all times.
Do Not insert any sharp objects into, or tamper with
parts in the charging switch recess. Irreparable
damage may be done.
Note
3-1
Fluke Biomedical
Radiation Management Services
6045 Cochran Road
Cleveland, Ohio 44139
440.498.2564
120 Andrews Road
Hicksville, New York 11801
516.870.0100
www.flukebiomedical.com/rms
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