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Summary of Contents for Rotem RAM ION
- Page 1 RAM ION DigiLog Meters For Wide Range Gamma, X-Ray and Beta Radiation Measurement RAM ION RAM ION-X Operating & Maintenance Manual Version 2.5 – November 2021 Document # PRIR43O9-2.5.DOC...
- Page 2 Version / Revision Log: RAM ION / Operating & Maintenance Manual Ver./Rev.# Date Revised Pages Comments March 2000 Operating & Maintenance Manual, Document # PRIR43O9.DOC Oct 2009 Jan 2012 Updated Table of contents July 2017 Corrected Paragraph 3.8 Push Button...
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Page 3: Table Of Contents
(U1) ................37 LECTROMETER NSTALLATION AND ALIBRATION ELECTROMETER BOARD TESTING WITH ELECTROMETER TESTER ........38 10.1........................39 REPARATION FOR ESTING 10.2..........................39 OWER UPPLIES 10.3........................39 ATTERY IRCUIT RAM ION DigiLog Meters / Operating & Maintenance Manual Page 3... - Page 4 HAMBER OVER ISASSEMBLY 11.5. ) ............41 HAMBER ISASSEMBLY INCLUDING LECTROMETER OARD 11.6......................41 LECTROMETER OARD EMOVAL 11.7......................42 LECTROMETER OARD SSEMBLY 11.8......................... 42 HAMBER SSEMBLY RAM ION DigiLog Meters / Operating & Maintenance Manual Page 4...
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Page 5: The Ram Ion Meter
1. The RAM ION Meter 1.1. General Description The RAM ION Meter is a portable ion chamber survey meter, designed for highly stable and accurate measurement of dose rates and integrated dose of gamma, x-ray and beta radiation. The meter covers a measuring range of 0.1 mR/h up to 50 R/h (1 Sv/h to 500 mSv/h) in the dose- rate mode and 1 R up to 1000 R (0.01 Sv up to 10 Sv) in the integrated dose mode. -
Page 6: Specifications
Up to 95% RH (non condensing) Casing Material Splash proof plastic case Width: 10 cm (3.9”) Dimensions Length: 25 cm (9.8”) Height: 19 cm (7.5”) Weight 850 g (1.9 lb) RAM ION DigiLog Meters / Operating & Maintenance Manual Page 6... -
Page 7: Operating Instructions
3.3. General Functions 3.3.1. Recent Modifications The RAM ION was modified to provide an instantaneous measurement of dose rate when subjected to pulsed radiation. When measuring pulsed radiation, the exposure duration is very short and the firmware of the instrument was adjusted to display the average dose rate during the pulsed X-ray exposure since the most recent timer reset. - Page 8 Dose Rate. Dose mode - The first short press on the push-button causes the blinking of the measuring RESET units, the second short press within 4 seconds resets the dose. RAM ION DigiLog Meters / Operating & Maintenance Manual Page 8...
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Page 9: Threshold Selection
Detector alarm The Err. LCDs and SPK icon will blink on the display in three cases: 1. Electrometer circuit is defective. 2. High voltage power supply is defective. RAM ION DigiLog Meters / Operating & Maintenance Manual Page 9... -
Page 10: Gamma And Beta Radiation Measurement
When the beta cover is off the Ion chamber, the meter measures beta & gamma radiation. Decreasing the gamma reading from the beta & gamma reading gives the beta radiation reading. RAM ION DigiLog Meters / Operating & Maintenance Manual Page 10... -
Page 11: Data Storage In The Internal Memory
LIGHT c) To transfer the saved records from the RAM ION meter to the PC, the supplied cable should be used. The RMV software in the PC are used to receive the meter's data. RAM ION communication protocol is adequate to RMV software. -
Page 12: Push-Buttons Function
Selects threshold value. Short RESET In case of alarm mutes the speaker. First press go to freeze and enable set to zero dose and rate. (uSv, uSv/h, uSv/h and F blink) RAM ION DigiLog Meters / Operating & Maintenance Manual Page 12... - Page 13 Clear data from the meter’s internal memory. Two sequential B.CODE (About 10 sec) first press display space memory long presses RESET available. (10 sec) Second press clear space memory to 346 maximum record. RAM ION DigiLog Meters / Operating & Maintenance Manual Page 13...
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Page 14: Batteries Replacement
(blue color). Blue – Silica Gel is dry and good. Pink – Silica Gel is wet and should be dried or replaced. RAM ION DigiLog Meters / Operating & Maintenance Manual Page 14... -
Page 15: Communication
4. Communication 4.1. General The RAM ION DigiLog Meters include two communication channels: – D-type connector, 9 pin COMM-1 – internal Molex connector COMM-2 1 is used for: COMM- - Communication between meter and built-in bar code reader (internal connection). -
Page 16: Ram Ion-X
The RAM ION X meter has been designed to measure the scattered leakage radiation of X-ray machines. The RAM ION X meter is the best solution for routine checks of gamma and X-ray radiation, in facilities like nuclear medicine radiotherapy, radiochemistry, radiography, research centers and other health physics applications. - Page 17 MODE dose high range mode. All the other functions are the same as in the basic RAM ION. Measuring Dose Rate in High Range Only (R/h) – is automatically performed when in the Auto range the reading exceeds 250 mR/h (2.5 mS/h), or manually performed by a long press on the push-button in the dose rate low range mode.
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Page 18: Icrp-51
6. ICRP-51 The RAM ION ICRP-51 meets the ICRP 51 publication recommendation for ambient dose equivalent H*(10). RAM ION DigiLog Meters / Operating & Maintenance Manual Page 18... -
Page 19: Calibration Instructions
The above radiation levels are only typical values. The exact values are determined according to the precise source radiation level. For acquiring the precise values, please check the specific calibration certificate attached to each instrument. RAM ION RAM ION DigiLog Meters / Operating & Maintenance Manual Page 19... -
Page 20: Computerized Calibration Rotem Meter Calibration - Rmc
The computerized calibration program enables to calibrate the ROTEM Meter with a very efficient and easy process, via RS-232 communication. The ROTEM Meters using the RMC software are: RAM ION, RAM ION DigiLog, TelePole HR, TelePole WR, TelePole Internal Detector. - Page 21 Source 2 - Enter source type used in the calibration facility. Calibration due - Set the calibration interval. Click OK to save data and quit. Click Cancel to cancel data changes and quit. RAM ION DigiLog Meters / Operating & Maintenance Manual Page 21...
- Page 22 To change the instrument Serial Number type the new serial number and click Send. 7.3.10. Select Parameters / Communication from the pull down menu. Set the Comm. port connected to the meter. Set Baud rate to 19200. RAM ION DigiLog Meters / Operating & Maintenance Manual Page 22...
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Page 23: Starting Up Calibration & Linearity Process
Linearity and check As Left. Note: In case of computer/instrument communication failure or disconnection, the Bad Communication Message is displayed in the computer’s display. Check the communication cable and/or Comm. port. RAM ION DigiLog Meters / Operating & Maintenance Manual Page 23... -
Page 24: Calibration
* Note: The calibration factors are selected according to the detector's radiation field location. Only the displayed factor can be changed. (3) Previous calibration factor as saved (stored) in the instrument memory. RAM ION DigiLog Meters / Operating & Maintenance Manual Page 24... - Page 25 Ensure to obtain the status: Factor Accepted. (7) Press Update Details. (8) Ensure to obtain Status: Details Accepted. (9) To quit the calibration function and return to the main menu, click End Calibration. RAM ION DigiLog Meters / Operating & Maintenance Manual Page 25...
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Page 26: Linearity
Distance and Att. - Distance between detector and source and attenuator number. As Found - Instrument reading prior to calibration. As Left - Instrument reading after calibration. Err. - Reading deviation % between measuring point (calculated value) and meter reading. RAM ION DigiLog Meters / Operating & Maintenance Manual Page 26... -
Page 27: Save, Load And Print Calibration And Linearity Certificate
Sources [Src] - Source type by which calibration and linearity were performed. Defined in the set-up parameters. Rotem Ind.- Customer: Enter header (up to 4 lines) for the calibration & linearity certificate. Curr. Calibrator - Present calibrator's name and calibration date. - Page 28 RAM ION DigiLog Meters / Operating & Maintenance Manual Page 28...
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Page 29: Electronic Block Diagrams Description
Power Supply Power Supply Vin Batteries H.V. +5V DC -5V DC -25V DC Offset Relay Range Change Relay Amplifier V / F Electrometer Detector To CPU X 10 Converter RAM ION DigiLog Meters / Operating & Maintenance Manual Page 29... - Page 30 -25V DC Power Supply (U3) The -25V power supply is a dc/dc switching regulator. It supplies dc power voltage to the amplifier (U6). Output voltage: -25V dc ±1 Ripple: lower than 30 mVpp RAM ION DigiLog Meters / Operating & Maintenance Manual Page 30...
- Page 31 The relation between field reading output voltage and output frequency is as follows: Reading up to 250 mR/h: 1mR/h = 172Hz = 43mV. Reading higher than 250 mR/h: 1mR/h = 1.72Hz = 0.43mV. RAM ION DigiLog Meters / Operating & Maintenance Manual Page 31...
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Page 32: Meter
“0” and the meter is turned off. Speaker Circuit (U13) The speaker circuit is activated in the following cases: a. Threshold level exceeding. b. Malfunction. c. Push-button press approval. RAM ION DigiLog Meters / Operating & Maintenance Manual Page 32... - Page 33 The touch panel push buttons are connected to the micro-controller chip in the CPU board via input latch, except the on/off push-button that is connected to the on-off circuit. RAM ION DigiLog Meters / Operating & Maintenance Manual Page 33...
- Page 34 The display driver (U17) receives clock and serial data from the CPU and transmits it in parallel to the display in three back planes. U18 - Rotem’s custom display especially designed for the RAM ION and RAM ION meters. The display includes: 3-character 7-segment, 2 decimal points, bar graph and data segments.
- Page 35 Memory card, PC #1944 E1, E2 – Short for DS 1244 E1, E2 – Open for DS 1243 E3 – (1-2) – Short for 27C512 E3 – (1-3) – Short for 27C256 RAM ION DigiLog Meters / Operating & Maintenance Manual Page 35...
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Page 36: Electrometer Board Testing With Standard Measurement Devices
9.3. Range Change Check 9.3.1. Disconnect JMP1 in the electrometer card. 9.3.2. Place a calibration source near the ion chamber and operate the RAM ION 9.3.3. Check the voltage on JMP1 (e.g. for a field of 10 mR/h voltage must be 430mV). -
Page 37: Offset Test
9.6.1. Bend the electrometer pin #2 outward and insert it in its socket. 9.6.2. Solder pin #2 to the Teflon isolated pin "A". Be sure leg 2 isn't touching anything except for pin "A". RAM ION DigiLog Meters / Operating & Maintenance Manual Page 37... -
Page 38: Electrometer Board Testing With Electrometer Tester
Model 11735/4 - 0049 Negative Electromete Reference voltage Board JMP1 PC 1784 Figure14-1. RAM ION Electrometer Note: The following procedures should be performed by an authorized person only. RAM ION DigiLog Meters / Operating & Maintenance Manual Page 38... -
Page 39: Preparation For Testing
10.5.5. Set R/h – mR/h switch to R/h mode. 10.5.6. Check the result in the TTL counter/ For a reading of 10 mR/h the TTL counter reading must be 17 Hz + offset frequency. RAM ION DigiLog Meters / Operating & Maintenance Manual Page 39... -
Page 40: V/F Test
11.1.1. Open the batteries compartment by inserting a coin in the cover slot and turning counter clockwise. 11.1.2. To disassemble the RAM ION front panel unscrew the four screws using a Philips screw-driver: two screws are located inside holes on both sides (upper corners) of the laser scanner housing (Fig. -
Page 41: Ion Chamber Cover Disassembly
11.6.3. Turn the screw located in the electrometer board center counter clockwise, to detach the board from the Ion chamber. 11.6.4. When lifting-up the electronic board, beware to keep the tiny parts (Teflon isolators, discs, screws). RAM ION DigiLog Meters / Operating & Maintenance Manual Page 41... -
Page 42: Electrometer Board Assembly
11.8.5. Turn the instrument body gently in the Ion chamber, so that the location of the three cycling screw holes will match in both parts. 11.8.6. Tighten the three fastening screws. 11.8.7. Tighten the screw in the silica-gel housing. RAM ION DigiLog Meters / Operating & Maintenance Manual Page 42...
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