Operating Procedure; How To Make Measurements - NUCLEONIX SYSTEMS RC 705E Instruction Manual

MENU
ACQ MODE
UPDATE BG ?
LABEL
TIME CONSTANT
UNIT
PASS WORD TO
BUZZER
ALARMS
ERASE MEMORY
SAVE ?
This unit is packed and dispatched in ready to use condition. On unpacking, user is advised to go through
OPERATING PROCEDURE (General)
5.3
Instruction Manual including instructions under Chapter V (5.1) completely.
Now switch ON the unit by pressing the power ON/OFF button.
User can now operate the equipment to make measurements in CPS/CPM or DOSERATE ( µR/hr & nSv/hr)
modes as per the requirement. User can store and recall the readings if required also.
Optional feature (offered against specific order only) :
Stored readings can be downloaded into a PC if required under the control of data communication software
which is supplied at extra cost as an optional accessor
Note : Once the meter is switched on it enters into BG measurement mode & at the end of measurement
(typically 20 sec) it display,
BG = 00222 nSV/hr (typical value in hyderabad) value depends on place & location.
Unit of BG, indicated will be the unit selected earlier. However user can change the unit by going to PROG
mode selecting the desired unit.
Once BG is recorded, user is now ready to make measurement on a 'sample for RaC inspection'.
The following are the prerequisite steps that we suggest before making the actual measurements:
HOW TO MAKE MEASUREMENTS ON A SAMPLE FOR RaC INSPECTION (STEP BY STEP PROCEDURE)
Employ a qualified science graduate with a responsible and meticulous attitude to make the measurements.
5.4
Training – Understand the user manual and documentation.
Making sure the instrument is in working condition and within calibration period.
The following are the steps to follow in making measurements to check for radioactive contamination:
Measure the natural background
Measure the sample near the same spot where natural background is measured
Identify whether it is clean sample or suspected contamination or sure contamination case
Take appropriate action
Repeat steps 1 to 4 for next measurement
5.4.1 MEASURING THE NATURAL BACKGROUND RADIATION
Natural Background radiation is the ionizing radiation constantly present in the environment, emitted
from a variety of natural and artificial sources.
It comes from 2 primary sources – Cosmic radiation (space) and terrestrial sources (soil, rock, vegetation,
air).
Natural background varies from location to location. For Eg. it is different in Mumbai and Hyderabad. It also
varies from one spot to another in the same location. For eg. it will be different inside your office building
when compared to the outdoor area. There is also a small variation even at the same spot.
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Low(4 sec), MEDI (8SEC), HIGH(12SEC)
RECALIB?
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ON / OFF
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Disabled / Enabled
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YES / NO
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YES
OPTIONS
CPS/µR/hr/nSv/hr/CPM
-
XX
µR/hr/nSv/hr
90
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