I N S T R U C T I O N
M A N U A L
NUCLEONIX SYSTEMS PRIVATE LIMITED
Plot No. : 162 A&B, PHASE II, I.D.A. Cherlapally, Hyderabad - 500 051.
Ph : 040-27263701, 32914548, Fax : 040-27262146
e-mail : info@nucleonix.com website : www.nucleonix.com
File Name : RM704_Man
Date : 12-05-2014
GAMMA RADIOGRAPHY SURVEY METER
TYPE : RM704
CONTENTS
SL.NO. DESCRIPTION PAGE NO.
CHAPTER I INTRODUCTION 01-01
CHAPTER II SPECIFICATIONS 02-02
CHAPTER III OPERATIG INSTRUCTIONS 03-07
CHAPTER IV BLOCK DIAGRAM DESCRIPTION 08-09
CHAPTER V EQUIPMENT MAINTENANCE SERVICES 10-15
AND WARRANTY CLAUSE
Important Note : For all Radiation meters which are battery powered & exported, battery cells
are removed & shipped. This is because air line / customs will not accept electronic equipments
with battery cells inside Hence customers are requested to procure these battery cells locally &
power-up the unit. For battery cells replacement, refer to CHAPTER-V.
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NUCLEONIX SYSTEMS PVT. LTD
CHAPTER - I
INTRODUCTION
Gamma Radiography Survey Meter Type RM704 designed, manufactured and supplied by
Nucleonix Systems is a state of art Micro-controller based unit which serves as a general purpose
alarming survey meter for use in medical, agricultural, industrial & other installations where
radioactive isotopes are used for a variety of applications.
This unit will be additionally used in measuring radiation levels in Reactor buildings, nuclear
installations, Radio-chemical plants, reprocessing plants, etc., It measures doserate in the range
of 0-50R/hr / 0-500mSv/hr in 5 linear ranges. It also measures count rate in the range of 0-
99999 cps in 4 linear ranges.
It has a lot of unique features which includes user interface through a set of four commands
buttons & the visual indication to the user is on a large analog LCD display. Data visualization is
provided on both linear analog scale & direct digital display.
FEATURES :
❑ Conforms to ANSI N42.17A performance specifications for Health Physics instrumentation
(portable) & CE compliant.
❑ Micro-controller based design.
❑ Compact, Elegant and light weight.
❑ Measures gamma dose rate in R/h or Sv/h
❑ Dose rate accuracy of +/- 15% with Co-60
❑ Overall response within +/- 20% in the energy range of 60 Kev to 1.33 Mev.
❑ Uses large area custom LCD display for dose rate visualization.
❑ Preset alarm facility for generation of audio / visual alarms.
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CHAPTER - II
SPECIFICATIONS
Radiation detected :
X and Gamma rays
Detector : A miniature halogen quenched GM detector with energy
compensating filter
Measurement Unit : CPS / R/hr / Sv/hr
Measurement Range
Doserate : 0 mR/hr - 50R/hr or
0 - 500mSv/hr in 5 linear ranges
Countrate : 0 - 99999 cps in 4 linear ranges
Accuracy : Within +/- 15% with Co-60
Indication (Visual) : Analog bar scale visualization along with direct digital
indication on custom backlit LCD display.
Range Selection : Automatic
Over range : Sense over range and shows on display
Energy response : Within + / - 20% in the range of 60 KeV to 1.33 MeV
Time constant : Floating time constant of 4 sec / 8 sec
Preset alarm range : 0 - 999.9 mR/hr or
0 - 9999 mSv/hr or
0 - 9999 cps
Once dose-rate / count-rate exceeds these levels alarms set ON
automatically.
Audio : Built-in piezo buzzer for generating audio chirps for radiation
events and alarm O/P for preset alarms.
User Interface : FN, , p&q are the four control buttons provided on the
instrument. The above buttons allow the user to program and
operate the instruments in appropriate manner for
configuration and measurement.
Power : 6V, DC size AA MN1500 LR6 (4 x 1.5V) alkaline cells.
Battery indication : Battery low indication is provided on LCD display
Dimensions : 106W x 196L x 85Ht in mm (approx.)
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CHAPTER - III
OPERATING INSTRUCTIONS
The instrument is configured and ready for use with default settings. If user extends to change
the settings may do so by going through below configuration options
3.1 CONFIGURATION BEFORE USE
3.1.1 SWITCHING ON/OFF THE EQUIPMENT
The instrument will be switched ON only when is pressed for minimum 1 sec. For
switching OFF the equipment pressed for minimum 2sec. If it is pressed for longer
time then it will automatically get switched OFF.
3.1.4 AUDIO
The instrument is given provision for audio to be generated through (headphones),
(buzzer) or it can be kept OFF. For that select the below screen on the LCD by
pressing FN key.
Now using p or q keys, toggle the audio status to
either ON ( headphone mode) or ON
( Buzzer mode) or OFF
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Now using p or q buttons select the required
unit as R/hr or Sv/hr or CPS.
After last key press, within a few seconds the new
measurements are done in the freshly selected unit.
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3.1.2 UNIT OF MEASURERMENT
The instrument is provided with 3 units of measurement - R/hr, Sv/hr and CPS. The
range of measurement is to be selected automatically depending upon the current
doserate/countrate level. Select the following screen by pressing FN key.
3.1.3 BACK LIGHT
The LCD display is provided with a LED backlight which can be turned ON if required.
For that select the below screen on the LCD by pressing FN key.
Now using p or q keys, toggle the backlite status
to ON or OFF. Keep the backlite OFF to maximize
battery life when not required.
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3.1.5 ADJUSTMENT OF CALIBRATION FACTOR
The instrument calibration factor is protected from unauthorized access by password
protection using below menu option calibration menu could be accessed.
Now using p and q keys, enter the unlock code
to modify the calibration factor
Now press p to set the blinking digit or q to
select the next digit for adjustment.
The alarm level is adjustable in the range of 0-
999.9 mR/hr in R/hr unit, 0 - 9999 mSv/hr in
Sv/hr and 0 - 9999 cps in cps unit.
3.2 MEASUREMENT MODE
RANGE SELECTION
3.2.1 R/hr MODE
The unit operates in 5 linear ranges 0 - 5mR/hr, 0 - 50mR/hr, 0 - 500mR/hr, 0 - 5R/hr
and 0 -50R/hr. Depending upon the doserate/countrate, the range of operation is selected
automatically in the unit.
(Full scale = 5mR/hr)
(Full scale = 5mR/hr)
3.1.6 ADJUSTMENT OF ALARM LEVEL
The preset alarm level of the instrument in the measurement unit can be set using the
below menu option. Press FN key to select the menu option.
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PRESET
D.RATE
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NUCLEONIX SYSTEMS PVT. LTD
(Full scale = 500mR/hr)
(Full scale = 5R/hr)
(Full scale = 50R/hr)
3.2.2 Sv/hr MODE
The unit operates in 5 linear ranges 0 - 50µSv/hr, 0 - 500µSv/hr, 0 - 5000µSv/hr, 0 -
50mSv/hr, and 0 -500mSv/hr. Depending upon current doserate, the range of operation
is selected automatically. The corresponding multiplication factors for bar scale indication
are (X 0.5µSv/hr, X5µSv/hr, X50µSv/hr, X0.5mSv/hr, X5mSv/hr)
3.2.3 CPS MODE
The unit operates in 4 linear ranges 0 - 100cps, 0 - 1000 cps, 0 - 10000 cps and 0 -
99999 cps. Depending upon current doserate, the range of operation is selected
automatically. The corresponding multiplication factors for bar scale indication are (X
1cps, X10cps, X 100cps, X 999 cps)
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X 5
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X 0.5
The range changeover happens automatically when doserate exceeds 90% of current
range or falls below 5% of current range.
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NUCLEONIX SYSTEMS PVT. LTD
3.3. DOSE RATE / COUNT RATE INTER PRETATION
Step -1 : Operating range selection
After power ON, the doserate/count rate ranges of operation are selected automatical
for the current unit of operation. If the dose rate exceeds 90% of a range then it switchs
to higher range. If it falls to less than 5% of current range then it would go to lower
range. In this way one of the 5 ranges in dose rate mode & 4 ranges in countsrate mode
are selected automatically.
If it exceeds full scale of the instrument O-Fl is shown on the instrument.
Step -2 : Dose rate / count rate inter pretation
For a given measurement range & unit the doserate / countrate canbe measured by
using 2 methods.
Method A : Using the 5 digit seven segment display shown on the bottom of the LCD
display along with the corresponding unit shown. This is direct readout value in selected
measurement unit. Multiplication factor should be ignored.
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Method B - Using analog scale indication : The measured doserate/countrate is shown
as a analog indication using 51 independent bar scale LCD segments
R/hr
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000.00
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Measured doserate =
(Last major division which is lit) +
(no.of segments lit after major division) x 2
X multiplication factor
Please refer to following examples to understand the doserate interpretation
Ex : 1
In this case all the segments are lit upto major
division 40. Additionally 2 minor segments
following 40 are also lit.
The multiplication factor shown is X 0.02 mR/hr. Now the doserate
= [40 + 2 x 2] x 0.05mR/hr
= 2.2mR/hr
Ex : 2
In this case all the segments are lit upto major division 80. Additionally 3 minor segments
following 80 are also lit.
The Multiplication factor shown is X 0.5mSv/hr
Now the doserate = [80 + 3x2] x 0.5mSv/hr
= 4.30mSv/hr
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X0.05
3.4 To make quality measurements
The instrument uses sliding time constant window to measure background radiation or
radiation emitted from a source / sample. Power the unit ON & select measurement unit.
Keep the unit front face in proximity to radiation source if applicable. Allow display to
show readings. After a gap of 10 seconds, take readings every 5 seconds. Take average of
about 5-10 readings to know the average doserate / countrate.
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CHAPTER - IV
BLOCK DIAGRAM DESCRIPTION
Gamma Radiography Survey Meter RM704 is a battery operated radiation survey meter which
works on 6V (4 x 1.5V) AA size battery). Internally the regulated power supplies of +5V and
+5V/6V are generated by two low dropout regulators for powering the pulse processing and
display section and the high voltage section. The high voltage section generates an EHT of +500V
@ 75mA for biasing the GM detector which is used as the radiation sensor.
Pulse processing section comprises of a micro-controller , BCD counter, a negative tail pulse to
TTL convertor, E2PROM, Reset circuit and buzzer driver ckt.
The display & user input interface section comprises of a custom LCD display & a 2x2 matrix
keypad for configuring and use of the instrument the custom LCD comprises of a full scale
indication of 0 - 100 on analog scale with a resolution of 2. A corresponding multiplication
factor along with the measurement unit is displayed below. When the segments of the analog
indication are lit, then that corresponds to the value of the current measurement multiplied by
the multiplication factor shown below as X #.## where #.## is the multiplication factor.
Direct digital readout is given below in the bottom by 5 independent 7 segment displays along
with decimal point. The measurement unit is same as that of the analog LCDindication. Howerver
multiplication factor is not applicable.
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BLOCK DIAGRAM OF GAMMA RADIOGRAPHY SURVEY METER
RM704
Keypad
(2x2)
LCD display (custom)
for analog scale
indication & direct
digital readout
MCU
E2PROM
RESET
Chip
BCD
counter
+500V
Buzzer
driver ckt
-ve tail to
TTL converto
Buzzer
+500V
High voltage
+500V
HV fract
+5V
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NUCLEONIX SYSTEMS PVT. LTD
CHAPTER - V
AVAILING OF MAINTENANCE/ CALIBRATION SERVICES AND
WARRANTY CLAUSE (with in India)
5.1 GENERAL
As per the warranty clause of the company we provide one year warranty during which period we provide
free service at our works. Hence in case of any mal-function in our instruments you are requested to send
the unit back to our works by RPP/COURIER/SPEED POST PARCEL/GATI/XPS/door delivery. We shall
arrange immediate rectification/replacement within two weeks from the date of receipt of the equipment
at our place. Please note that the equipment will be serviced at our works only.
The equipment is to be sent to :
The Servicing Department
NUCLEONIX SYSTEMS PRIVATE LIMITED
Plot No : 162 A & B, PHASE II, I.D.A.Cherlapally,
Hyderabad - 500 051Ph : 040-27263701/329145448/32918055
e-mail : info@nucleonix.com www.nucleonix.com
For all the Radiation monitoring equipment, detectors built-in or external probes will not have one-year
warranty, only inspection warranty at the time of supply is provided. Since detectors will / may have fragile
glass construction we do not provide warranty. In case of failure of these components at cost price as per
Nucleonix price list user has to buy.
Note : In respect of all types of portable radiation monitors, it may be necessary to checkup and recalibrate
the equipment once a year at our works.
5.3 EQUIPMENT REPAIRS / SERVICING POLICY (WITH IN INDIA)
5.3.1 DURING WARRANTY
The following procedure is to be followed by the customers with in India for availing services/ repairing
facility during warrantee period.
● Equipments are to be sent to our works for availing free repair services during warrantee, after the
customer receives approval from the customer support division, by sending an e-mail.
● For all equipments, costing less than 6.0 lakhs one year warrantee & free service is offered, when the
equipments are sent to our works only. For larger systems such as installed systems, networked systems,
specialized systems, costing more than 6.0 lakhs during one year warrantee, free service is offered at
site. Field service Engineer will be deputed subject to warrantee terms & conditions.
● This does not include personal computer related problems, for which local computer service provider
of the PC vendor is to be contacted. Also for software related problems online support will be provided.
Software support doesn't include cleaning of virus problems etc.
● When the equipments are sent to our works for warrantee services, they are to be properly packed
with adequate cushion to prevent any transportation damages. Nucleonix Systems is not responsible
for damages or loss during transportation.
● Packing / Freight charge is to be borne by customer when he sends the equipment to our works. However
when we return after servicing packing will be Nucleonix responsibility & Freight charges will be to
your account. Only services are free.
● Please indicate in your correspondence equipment model & serial number.
● All the equipments are to be sent to our works only on door delivery basis.
● For Door Delivery Transportation contact XPS/GATI cargo in your city / town or a reliable courier service
to pick the consignment from your place. For their nearest local address & phone no's look into their
websites. Transit insurance if the customer feels is necessary it is to be covered.
● Nucleonix Systems will not receive the equipments sent by other modes of transportation, such as Rail/
Road.
● After servicing, equipments will be sent back by same mode of transport such as XPS/GATI/COURIER/
RPP.
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● All types of Radiation detectors, glass ware, PMTs etc which are fragile are not covered in warrantee, if
the failure is due to physical damage, external or internal due to shock, dropping, miss-handling etc. If
the failure is due to a natural fault then only it is covered under warrantee for a limited period of three
months. However complete electronics is covered for 1 year warrantee.
● You can also send the equipment personally to our works for repairs either during or after warrantee,
after fixing up with our service dept (Customer Support Division). If possible we may repair on same
day or your person can stay for a day or two & get it repaired & or calibrated.
5.3.2 AFTER WARRANTY SERVICES
● On expiry of 1yr warrantee if you like to send the equipment (low cost less than 6.0 lakhs) for repairs
to our works, you may please observe the following procedure.
● Send an e-mail with details mentioning that you agree to pay service charges which includes: Basic
service charges per unit / module in the range of Rs: 2500 to Rs : 10,000 depending on the
sophistication of the unit calibration charges ( if applicable for your equipment) + cost of components
+ packing charges + Return Freight charges @ actual.
● Once our customer support department responds & requests you to despatch the equipment to our
works for repairs, you may do so by following the steps given below.
● Followed by this you can send the equipment straight away if it is within 5 yrs old. If the equipment is
beyond 5 yrs old, then also you can send it for repairs, however only after you receive confirmation
from Customer Support Division, that it is repairable & is not an obsolete model. If the design is obsolete
then customer support division (CSD) may give you 'buy back' offer to replace with new model or
upgrade it with electronic circuit boards & enclosure.
● For all installed equipments costing above Rs: 6.0 lakhs which are larger in size & for which field
servicing only is recommended, you can obtain a quotation with relevant details by sending an e-mail &
avail the services accordingly.
● For all field servicing jobs, since we need to depute engineers, it is likely, to take time & also it will cost
more which includes Engineer's TA & DA etc., apart from basic service charges + cost of spares etc.
Please note that basic service charges will be different for different products depending upon
sophistication.
● Also in some cases it may not be possible to fix-up the problems in the field itself, in such cases we may
advise you to send them to our works.
● For all jobs to be serviced in the field, customer is requested to provide adequate details on the nature of
problems, to enable our engineer to come prepared with adequate spares.
● For any additional information send an e-mail to info@nucleonix.com, Atten: Customer support
division.
5.4 EQUIPMENT REPAIRS / SERVICING POLICY (FOR EXPORTS)
Equipments, manufactured & exported are subjected to a well defined quality assurance (QA) plan & Factory
acceptance tests (FAT). Nucleonix systems has the following policy to provide maintenance support to overseas
customers either directly or through international dealers / distributors.
(a) During & after warranty:
● For minor problems, which can be handled by customers, servicing tips have been provided in the user
manual / servicing manual.
● Also most of the equipments have built-in fault diagnostic features which will indicate to the user nature
of problem in the equipment. Based on the visual indication in the instrument Display, user can take
corrective action or contact Nucleonix systems by email for help.
● Nucleonix systems will guide in localizing the defective part / module or sub-system by interacting
with the customer if required. Skype will be used for communication.
● During warranty free replacement of sub-system or board (PCB) will be done. However customer has
to send defective sub-system back to Nucleonix system with-in 15 days on arranging replacement.
● During & after warranty, any Freight charges & customs clearance charges are to be borne by customers,
both ways.
● If it is a manufacturing defect, then Nucleonix system will bear the replacement cost of sub-system /
unit. However any Freight charges & customs clearance charges in their country are to be borne by
customer.
● After warranty, services will be similar to that of services during warranty. However, customer will have
to pay for cost of parts replaced, freight charges both ways & customs clearance charges in both the
countries. Nucleonix systems plans to introduce audio visuals on web or on CDs to facilitate product
demonstration, installation & minor maintenance very soon.
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5.5 HOW TO AVAIL CALIBRATION SERVICES (FOR INDIAN CUSTOMERS)
Nucleonix Systems offers radiation calibration services to its customers. Calibration services are provided for
Nucleonix Systems manufactured products only, in general, as a company policy.
How to avail calibration services:
It is best advised that each of the Radiation monitors including Area monitors are calibrated once in a year.
When you want to send your Radiation monitor / Area monitor / Contamination monitor for calibration to
our works. You may send the equipment for calibration, by following the steps given below:
1. Our standard calibration charges per equipment (All types of Radiation monitors including portable
survey meters, contamination monitors & Area Gamma Monitors) are Rs: 2500 + Packing + Freight
charges. You can email a 'work order' accepting these charges.
2. Email your work order and despatch / send the equipment to our works if it is 5 years old or less
including details of mode of transport sent with docket particulars.
3. Also mention in your work order & clearly indicate that you will agree to pay calibration charges & also
equipment repair charges additionally if the unit is faulty & requires repairs before one can take it up
for calibration.
4. You are requested to ensure good packing to avoid any transportation damages. Especially if there are
external detector probes, they are to be packed with sufficient soft foam to ensure no damage in
transportation.
5. Use only the specified following mode of transportation system for dispatching on door delivery basis.
XPS/GATI cargo / Courier/RPP/Speed Post parcel etc. Send the equipment on freight paid basis.
(Equipments sent by other methods such as Rail/Road etc will not be collected). Also you can cover for
transit insurance both ways if you wish. Nucleonix system is not responsible for any transportation
damages or loss during transportation both ways.
6. Immediately on receipt of the equipment, we will send an acknowledgement & also a proforma bill by
email/ post.
7. Based on the proforma bill, once we receive the payment, equipment will be dispatched back by similar
mode of transportation as mentioned above.
5.6 HOW TO AVAIL CALIBRATION SERVICES (FOR FOREIGN CUSTOMERS)
Foreign customers can calibrate Nucleonix make Radiation monitors/equipments in their country at any of
their accredited Radiation calibration labs. Nucleonix systems will be happy to provide any help and guidance
if needed, for calibration. Alternatively if you send the equipment here to India we can also provide calibration
services.
CALIBRATION STANDARDS LAB & FACILITY :
We have two calibration labs . (1) Low level Calibration Lab (2) High Dose Rate Calibration Lab
(1) Low level Calibration Lab : This has a Cs-137, 165 mCi standard. "Gamma Survey Instruments
Calibration" from Amersham.
This has NIST Traceability Calibration of all portable radiation monitors, survey meters, contamination
monitors, Area monitors etc., is carried out in this lab upto 1R/hr max doserates.
Gamma Survey Instruments calibration has Cs-137 source 161.5 mCi as on 5th Aug 2002. It is basically
a Gamma Survey Instruments calibrator procured from AEA Technologies UK/USA. Has NIST traceability
within +/- 7%.
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NUCLEONIX SYSTEMS PVT. LTD
(2) High Dose Rate Calibration Lab : This lab has a 8Ci, Co-60 standard housed in a CRC-2
camera, operated remotely viewed through CCTV arrangement. High dose rate survey meters,
High level Area monitors etc are calibrated in this lab. This CRC-2 camera is housed in a
separate concrete building. All the radiation monitors manufactured by Nucleonix Systems
are authentically calibrated at this facility, before they are shipped / dispatched.
CRC-2 camera has Co-60 standard obtained from Bhabha Atomic Research Centre, Mumbai.
It is a certified source
5.7 ANNUAL MAINTENANCE CONTRACT (AMC)
Annual maintenance contract (AMC) services:
For all sophisticated instruments & systems and also for installed monitors & networked systems in a nuclear
facility or a Radiological lab or in a Medical cyclotron facility where no. of instruments are networked, it is
advised that customer enters into an economical Annual maintenance contract with Nucleonix system.
Detailed AMC proposal can be obtained from our customer support division (CSD), by giving required inputs.
Inputs required by our CSD to send you AMC proposal:
● Name, year & data of purchase, Sl. Nos. of equipments, Model No's, No. of equipments for which AMC is
required. Additionally no. of calls per annum required for preventive & breakdown maintenance may
also be indicated.
Advantage of entering into AMC:
● Equipment services offered will be prompt & timely
● Nucleonix systems maintain required spares, spare tested PCBs, detectors & other critical components
which may become obsolete.
● Obsolescence in electrons is quite rapid. If you enter into AMC guaranteed service for the period of
AMC will be the responsibility of Nucleonix Systems.
● Nucleonix Systems will maintain Engineers at your disposal to attend to AMC calls on time
● Without AMC prompt service calls are not guaranteed.
● If some critical components become obsolete, then Nucleonix systems may request you to upgrade the
product with new model or new electronics which may be expensive if you are not under AMC.
Training on maintenance / servicing:
● To a limited extent, we offer training on maintenance / repairs at our works to customers on chargeable
basis. Details can be obtained from our customer support division, by customers who may require such
services.
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Top of latch
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2
Bottom of latch
HOW TO REPLACE BATTERY
When you observe battery low voltage indication 'LB', on left corner of LCD display, it is advised
that the battery be replaced to ensure correct calibration and indication of the dose rates.
Follow the below procedure for replacement of battery
a) Lift the two latches and disengage the top unit from its bottom cover. Now holding the
bottom cover lift off the top unit by its handle. (Steps 1 & 2)
b) Notice battery holder on the bottom side of instrument electronic unit cover for battery
holder is to be removed by unscrewing holder lid screws. (Step 3)
c) Now the existing batteries mounted in the battery holder are to be removed and replaced
with new set of batteries ensuring proper polarity. (Step 4 & 5)
d) Now check battery voltage again, for that switch 'ON' the unit and see that 'LB' is not
displayed on LCD display.
e) Now assemble back the top unit in its bottom cover and close the unit using the latches
provided.
Note : To separate the top instrument panel with handle which also contains electronics PCB,
from the bottom cover follow the instructions given below;
A. Hold the latches both sides as shown in the above figure with thumbs touching onto the top
of latch and first finger touching on to the bottom of the latch.
B. Now bottom of the latch should be pulled outwards by using first finger as indicated in
figure, by arrow.
C. This will loosen in the latches, facilitating one, to separate the top instrument panel with
handle, from the bottom enclosure of the unit.
Step-1
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NUCLEONIX SYSTEMS PVT. LTD
Step-2
Step-3
Step-4
Step-5
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