MAX-4000 Electrometer - VIEW
Contents
1. 1 which contains a defect covered by the above warranties 2 which are reported to Standard Imaging Inc not later than seven 7 days after the expiration date of the warranty period in the table 3 which are returned to Standard Imaging Inc promptly after discovery of the defect and 4 which are found to be defective upon examination by Standard Imaging Inc Transportation related charges including but not limited to shipping customs tariffs taxes and brokerage fees to Standard Imaging are the buyer s responsibility This warranty extends to every part of the product except consumables fuses batteries or glass breakage Standard Imaging Inc shall not be otherwise liable for any damages including but not limited to incidental damages consequential damages or special damages Repaired or replaced products are warranted for the balance of the original warranty period or at least 90 days This warranty is in lieu of all other warranties express or implied whether statutory or otherwise including any implied warranty of fitness for a particular purpose In no event shall Standard Imaging Inc be liable for any incidental or consequential damages resulting from the use misuse or abuse of the product or caused by any defect failure or malfunction of the product whethera claim of such damagesis based upon the warranty contract negligence or otherwise This warranty represents the current standard warranty of Standard Ima2. amp Rate Charge Mode 2 Use the Bias mode to set the bias voltage 3 Use the Mode button to select the Charge Mode or Rate Charge Mode Select a Charge Collection Mode Proceed to desired step 4 Timed Use the arrow buttons to select the collection time Time periods from 0 600 seconds are available in 15 second increments Irradiate the onization chamber Press the Start Reset button The MAX 4000 will count down from the time set and display the charge accumulated When the countdown is com plete the charge ac cumulated will remain until the unit is reset Record the reading and press the Start Reset button to clear the reading and reset to the chosen collection time Repeat steps 4 7 for other charge readings MAX RUN 4 Use arrow buttons to select MAX RUN 5 Press Start Reset but ton to start charge col lection The MAX 4000 will continue to collect charge until stopped by pressing the Start Reset button 6 irradiate the ionization chamber 7 Record the reading after irradiation period 8 Press Start Reset to stop collection and reset reading 9 Repeat steps 4 8 for other charge readings NOTE Thecharge collection is erased when stopped so record value before stopping electrometer NOTE Charge measure ments greater than 999 999 nC will produce an OVER LOAD message 10 11 Threshold Use arrow buttons to select THR DET Pres
3. and the start value must be larger than the stop value Use the mode button to select mode of operation You may use the mode button to return to the Threshold Lev els mode at any time If invalid numbers are entered the invalid entry will be displayed after pressing the Mode button System Zeroing 1 2 Connect the onization chamber to the MAX 4000 and select the desired voltage bias Allow at least 10 min utes for the system to stabilize Verify the leakage of the onization chamber is within the manufacturer s stated acceptable limits Press and hold the Mode button for 2 seconds to repeat the zeroing pro cess but with the onization chamber connected This is the system zero adjustment Using the MAX 4000 Charging the internal battery 1 When the battery capacity is 15 or less RECHARGE BATTERY appears on the display Plug the 2 1 mm plug of the charger into the electrometer and the other end into mains power 2 Whenever external power is sup plied the small amber light ad jacent to the MODE switch on the front panel is lit This activates the charging circuit and the Battery per cent display in the Bias mode will indicate CHRG 3 The MAX 4000 will also operate with the charger plugged into a wall out let regardless of the battery capacity Re charging the battery takes 6 8 hours The MAX 4000 may be con tinually charged with no detrimental effects to the internal
4. surfaces to remove dirt and dust Remove any remaining dirt with a cloth slightly dampened with a solution of mild detergent and water or a liquid disinfecting agent Do not use water or liquid on triax jack Do not permit any liquid to seep into the MAX 4000 in any manner during cleaning It is not recommended to clean the window of the LCD with anything other than a mild detergent and a very soft cloth Failure to use a soft cloth may result in a scratched window and this may impair the visibility of the LCD Qualified users may replace the Lead Acid battery only An illustrated Instruction Booklet is available See the Parts and Accessories List below There are no other user serviceable parts in the MAX 4000 If assistance is desired in the proper disposal of this product including accessories and components after its useful life please return to Standard Imaging Troubleshooting Questionable Readings If readings are off determine if there is any leakage from the MAX 4000 or ionization chamber Follow steps 1 7 under General Operation Can t Get Out of Charge Mode or Rate Charge Mode Upon completion of a charge collection in the Charge mode or Rate Charge mode the Start Reset button must first be pressed to reset the display before other buttons will function No Response If the system does not respond to any of the buttons use the external reset switch See page 4 for details Low Battery The MAX 4000 contain
5. or charge modes only and is only valid for these modes The thresh old mode is not used during ADCL calibration as pre start and post stop currents are not measured These currents become part of the signal and therefore would not be accounted for in the calibration CAUTION A When connecting or discon necting an ionization cham ber to the MAX 4000 set the bias voltage to 0 0 VDC Table of Contents 2 General Precautions 3 General Operation 4 Front Panel 4 Rear Panel 5 Setting up the MAX 4000 7 Using the MAX 4000 9 MAX COMM Software 9 Maintenance 10 Troubleshooting 10 Parts and Accessories List 11 Features and Specifications 15 Service Policy 15 Customer Responsibility 16 Warranty General Operation Standard Imaging ul 7601 MURPHY DRIVE MIDDLETON WI 53562 2532 USA WWW STANDARDIMAGING COM 1 With nothing connected to the input jack of the MAX 4000 turn the power on and wait at least 10 minutes for the electrometer to warm up 2 Select the desired Range of Operation Low or High with the arrow buttons followed by the Mode button 3 Press the Start button to perform the electrometer zero adjustment This will take about one minute 4 Connect the ionization chamber to the MAX 4000 and select the desired voltage bias Allow at least 10 minutes for the sys tem to stabilize 5 Verify the leakage of the ionization cham ber is within the manufacturer s stated ac ceptab
6. 300 VDC Automatic zero function user activated Isolated RS 232 Default uni directional 19 200 baud 8 data bits no parity 1 stop bit Bi directional operation via 1 Argus QC4 Software 2 User provided request Tech Note Doc No 4426 22 2 cm 8 24 in 7 cm 2 75 in 23 cm 9 in 1 4 kg 3 0 lbs UL listed wall mounted power supply 110 or 220 VAC input 9 VDC 300 mA output IEC 60601 1 IEC 60601 1 2 IEC 60731 ong Specifications are subject to change without notice 1 Externally Certified Designed to Meet 12 Notes Notes Service Policy If service including recalibration is required please contact Standard Imaging s Customer Service department by phone or email prior to shipping the product Standard Imaging s Customer Service and Technical Service staff will attempt to address the product issue via phone or email If unable to address the issue a return material authorization RMA number will be issued With the RMA number the product can be returned to Standard Imaging It is the responsibility of the customer to properly package insure and ship the product with the RMA number clearly identified on the outside of the package The customer must immediately file a claim with their carrier for any shipping damage or lost shipments Return shipping and insurance is to be pre paid or billed to the customer and the customer may request a specific shipper Items found to be ou
7. 50 00 pA High 0 001 nA 195 00 nA Low 0 01 pC 999 999 nC High 0 01 nC 999 999 nC Timed charge collection Continuous charge collection Threshold controlled charge collection Threshold Levels for charge collection Start Stop 0 02 9 99 pA 0 01 9 98 pA Start value must be larger than stop value Selectable Time Periods for Charge Collection Range Increments Resolution Range Switching Repeatability Short term Long term Signal settling time typ Linearity Leakage Zero Drift Operating Conditions Pressure Temperature Relative Humidity Storage and Transport Conditions Pressure Temperature Relative Humidity 15 600 seconds 15 seconds 1 second User selectable 0 1 one count 0 2 max change over 2 yrs High Range 12 sec Low Range 3 sec 0 06 typical all rate and charge settings Low Range lt 1 fA at STP High Range lt 5 fA at STP 680 to 770 mm Hg 10 to 40 C 20 to 80 non condensing 600 to 800 mm Hg 15 to 50 C 10 to 95 non condensing Specifications are subject to change without notice 11 Features and Specifications Continued Display Input Bias Voltage Five user settings Zeroing Output Dimensions Width Height Length Weight Power Requirements Product Standards LCD 2 x 20 with 5 16 in high characters BNC two lug triaxial connector Nominal 300 volt bias 300 150 0 150
8. G www Standard Imaging com MAX 4000 Electrometer REF 90015 A See VXcomM Software package for installation CD ROM STANDARD IMAGING INC TEL 800 261 4446 7601 Murphy Drive TEL 608 831 0025 lt Standan o Middleton WI 53562 2532 FAX 608 831 2202 ASY Imaging Feb 2005 02005 Standard Imaging Inc DOC 80206 16 N General Precautions WARNING An electrical shock hazard of up to 300 VDC is possible whenever the bias voltage is active Always set the bias to the 0 or 0 VDC level when ever a device is connected to or disconnected from the MAX 4000 CAUTION Input voltage on triax con nector should be no greater than 5 V or 5 V CAUTION Do not connect RS 232 serial port to the telephone line This portis for connection to equipment where no risk of external voltage exists CAUTION This device should never be submerged in water or a solvent to clean or scrubbed with an abrasive cleaner Do not drop or mishandle unit Calibration factor changes may result CAUTION Do not disassemble unit since it may result in change of calibration factor Refer servicing to qualified indi viduals Warnings and Cautions alert users to dangerous conditions that can occur if instructions in the manual are not obeyed Warnings are conditions that can cause injury to the operator while Cautions can cause damage to the equipment CAUTION ADCL calibration is provided in the rate and
9. battery Automatic shutdown To maximize battery life the MAX 4000 will shut off automatically if it is not plugged into the wall charger and is left unattended for more than 3 hours NOTE Depending on the type of mea surements performed leakage currents within the ionization chamber can be a significant portion of the measured data The electrometer zero can be adjusted to compensate for leakage currents of the ionization chamber by pressing and hold ing the MODE button for 2 seconds after the chamber has been connected and the system has warmed up This will place the electrometer into the zeroing mode and a system zero can begin This is applicable for the both the Rate and Charge modes Refer to page 6 for more information on system zeroing Rate Mode 1 Use the Range mode to select the range of operation 2 Use the Bias mode to set the bias voltage 3 Use the Mode button to select the Rate Mode 4 Irradiate the ion chamber with a radioactive source 5 The MAX 4000 will begin to mea sure the current For signals 2 nA and below allow about 12 seconds for the signal to stabilize For signals above 2 nA wait about 3 seconds for stabilization 6 The Rate measurement will be dis played NOTE Rate measurements of 194 99 nA High range or 950 00 pA Low range will produce an OVERLOAD message 1 Use the Range mode to select the range of operation Using the MAX 4000 Continued Charge Mode
10. der of a licensed medical practitioner The use of this product should be restricted to the supervision of a qualified medical physicist Measurement of high activity radioactive sources is potentially hazardous and should be performed by qualified personnel Should repair or replacement of this product become necessary after the warranty period the customer should seek advice from Standard Imaging Inc prior to such repair or replacement If this product is in need of repair it should not be used until all repairs have been made and the product is functioning properly and ready for use After repair the product may need to be calibrated The owner of this product has sole responsibility for any malfunction resulting from abuse improper use or maintenance or repair by anyone other than Standard Imaging Inc The information in this manual is subject to change without notice No part of this manual may be copied or reproduced in any form or by any means without prior written consent of Standard Imaging Inc Warranty Standard Imaging Inc sells this product under the warranty herein set forth The warranty is extended only to the buyer purchasing the product directly from Standard Imaging Inc or as a new product from an authorized dealer or distributor of Standard Imaging Inc For a period provided in the table below from the date of original delivery to the purchaser or a distributor this Standard Imaging Inc product pro
11. ging Inc Please refer to the labeling or instruction manual of your Standard Imaging Inc product or the Standard Imaging Inc web page for any warranty conditions unique to the product 16
12. le limits 6 Press and hold the Mode button and re peat the zeroing process in Step 3 but with the ionization chamber connected This is the system zero adjustment 7 Check the system leakage Take a read ing without exposing the chamber to radia tion This reading should be less than 0 1 of the final signal expected 8 Measure the atmospheric temperature and pressure 9 Turn on or insert the radiation source s and take at least 3 measurements Further explanation of the Range Threshold Rate Charge and Rate Charge modes can be found on pages 5 7 10 Analyze the data taking into account the average of the readings system leakage temperature pressure corrections calibration factors and any other appropriate corrections to be made 11 When all measurements are completed set bias voltage to 0 VDC turn off the MAX 4000 and disconnect the ionization cham ber Front Panel MAX 4000 A Standard A imaging 34 5 Power button Turns the unit off and on Input connection A standard two lug BNC triax connector for signal input This connector features low leakage current properties The signal current is carried on the cen tral lead the guard carries the high voltage and the outermost ring is ground To protect the input connector al ways replace the chain cap when the MAX 4000 is not in use Battery Charging Light When lit the battery charger is energized and charging the internal bat
13. s 1 rechargeable sealed lead acid battery with a life of about 10 hours When the battery is at 15 of capacity RECHARGE BATTERY will ap pear on the display If the battery becomes low during a charge collection the screen will alternate between RECHARGE BAT TERY and the status of the collection The collection process will not be interrupted The MAX 4000 will also operate with the char ger plugged into a wall outlet Re charging the battery takes 6 8 hours The MAX 4000 may be continually charged when not in use with no detrimental effects to the internal battery The MAX 4000 will shut off automatically if it is not plugged into the wall charger and is left unattended for more than 3 hours If you require further assistance please contact Standard Imaging s Service Department at 800 261 4446 or 608 831 0025 for international calls Parts and Accessories List REF Description 80206 Instruction Manual 72011 Battery Charger 110 VAC 76007 Battery Charger 220 VAC 72013 Telco Adapter Kit RJ 11 to DB 9F 73006 110 Lead Acid Battery Replacement Kit including 110 VAC wall charger 73006 220 Lead Acid Battery Replacement Kit including 220 VAC wall charger 75501 MAX COMM Software 4426 Technical Note Command Set for Bi directional RS 232 operation 10 Features and Specifications Rate Mode Ranges Charge Mode Ranges Charge Collection Modes Timed Max Run Thr Det Low 0 001 pA 9
14. s Start Reset but ton to start detection Meter will display THR RDY Irradiate the ionization chamber When the threshold start level is exceeded the MAX 4000 will be gin to collecting charge and the display will change to THR TRG The MAX 4000 will con tinue to collect charge until the measured current is below the threshold stop level When stopped the display will change to THR RDY Record charge value Repeat steps 6 10 for other charge readings Press Start Reset but ton to exit threshold charge collections The display will change to THR DET MAX COMM Software The MAX 4000 electrometer is compatible with Standard Imaging MAX COMM soft ware MAX COMM expands the functional ity of a MAX series electrometer by adding y chamber libraries temperature pressure Standard Imaging correction factors and more The program installation package is included with your OMM MAX 4000 shipment with an enclosed CD ROM The MAX COMM user manual is available electronically in PDF format on the program CD ROM and includes detailed instructions for installation setup and use with this electrometer Maintenance As is standard practice for other electrometers it is recommended that the MAX 4000 be calibrated every 2 years This calibration should be performed by an Accredited Dosimetry Calibration Laboratory Exterior cleaning of the device can be done with a soft brush and a cloth Gently brush all
15. t of warranty are subject to a minimum service fee of 1 hour labor excluding recalibrations for diagnostic efforts and require a purchase order PO before service is performed With concurrence from customer the product may be replaced if it is unserviceable or if the required service is cost prohibitive Products incurring service charges may be held for payment Standard Imaging does not provide loaner products See the Standard Imaging Warranty and Customer Responsibility for additional information Standard Imaging products have unit serial numbers with coded logic which indicates the product day and year of manufacture and a sequential unit number for identification E YY DDD X E MAX 4000 Product Line YY Last two digits of the year e g 1999 99 2000 00 DDD Day of the year 1 lt DDD lt 365 x Unique unit ID Number 1 lt X lt 9 Customer Responsibility This product and its components will perform properly and reliably only when operated and maintained in accordance with the instructions contained in this manual and accompanying labels A defective device should not be used Parts which may be broken or missing or are clearly worn distorted or contaminated should be replaced immediately with genuine replacement parts manufactured by or made available from Standard Imaging Inc CAUTION Federal law in the U S A and Canadian law restrict the sale distribution or use of this product to by or on the or
16. tery Mode button Press to toggle through the modes in the follow ing order Range Bias Thresh old Levels Rate Charge and Rate Charge Press and hold for 2 seconds to select the zero ad justment procedure and perform system zero Start Reset button Press to start and stop timed charge collections in the Charge or Rate Charge mode or to reset the display following a collection Arrow buttons Press to toggle the Range selection voltages in the Bias mode or to select the time period increments for taking a charge read ing Rear Panel 23 2 1 mm Battery Charger Input Connect the battery charger to this input jack when charging the internal battery Note If the MAX 4000 is being used in a patient environment do not plug in the charger Connect to mains power through an isolation transformer only RS 232 serial port A standard 4 conductor telephone cable may be used to connect to the serial port for remote observation or data recording A 15 cable and DB 9 fe male adapter for connection to the computer has been provided Do not connect RS 232 serial port to the telephone line This port is for connection to equipment where no risk of external voltage exists External reset switch In the un likely event that the device stops responding use a small diameter rod to lightly press the internal but ton and reset the device Setting up the MAX 4000 Before using
17. the MAX 4000 to take measurements perform the following steps to ensure accurate readings The MAX 4000 features an automatic zero function and a convenient way to check battery status and bias level Auto Warm Up and Zero Adjustment 1 Turn on the MAX 4000 The display will count down a 10 00 minute warm up The warm up may be bypassed by pressing the MODE button If you choose to bypass the warm up be aware that repeatability and leakage specifications may not be achieved until 10 minutes has elapsed 2 Select the desired Range of Opera tion Low or High with the arrow but tons followed by the Mode button Press the Start button to perform the zero adjustment This process will take 60 seconds 3 The display will read ZEROING COMPLETE The MAX 4000 now defaults to the Bias mode NOTE Each Range of Operation must be zeroed upon initial use To perform subse quent zero adjustments press and hold the Mode button for two seconds Range Selection Mode 1 The measuring range of the MAX 4000 is displayed as High or Low The actual numeric range is also shown to indicate the proper units of measurement for each range 2 Use the arrow buttons to select the desired range of operation Range change is immediate 3 Use the mode button to select mode of operation You may use the mode button to return to the range selection mode at any time Bias Mode 1 The charge level of the internal bat tery is displa
18. vided in the table is warranted against functional defects in design materials and workmanship provided it is properly operated under conditions of normal use and that repairs and replacements are made in accordance herewith The foregoing warranty shall not apply if the product has been altered disassembled or repaired other than by Standard Imaging Inc or if the product has been subject to abuse misuse negligence or accident Product Warranty Period Standard Imaging lonization Chambers 2 years Standard Imaging Well Chambers 2 years Standard Imaging Electrometers 2 years Standard Imaging Software Products 1 year All Other Standard Imaging Products 1 year Standard Imaging Custom Product 90 days Consumables 90 days Serviced Product 90 days Resale Products As defined by the Original Equipment Manufacturer 0 90 days 100 of ADCL Calibration Costs ADCL Product Calibration 91 182 days 75 of ADCL Calibration Costs Standard Imaging uses the UW ADCL for 183 365 days 50 of ADCL Calibration Costs recalibrations required under warranty 366 639 days 25 of ADCL Calibration Costs days from date of shipment to customer Standard Imaging s sole and exclusive obligation and the purchaser s sole and exclusive remedy under the above warranties are at Standard Imaging s option limited to repairing replacing free of charge or revising labeling and manual content on a product
19. yed in percent When the battery capacity drops below 15 the display will read RE CHARGE BATTERY 2 Use the arrow buttons to select the bias level from the following op tions 100 300 VDC 50 150 VDC 0 0 VDC 50 150 VDC 100 300 VDC 3 Press the Mode button to select a mode of operation You may return to the Bias mode at any time to change the bias voltage N CAUTION When connecting or discon necting an ionization chamber to the MAX 4000 setthe bias voltage to 0 0 VDC Threshold Levels The MAX 4000 Electrometer has a thresh old mode which allows it to automatically detect the start and stop of a radiation ex posure by measuring the current crossing predetermined limit thresholds The start and stop thresholds are set independently with the default settings of start 0 8 pA and stop 0 5 pA Threshold limits cannot be set to 0 0 When making measurements in the presence of larger leakage currents it may be necessary to raise the threshold limits Conversely since the start threshold Setting up the MAX 4000 Continued determines the minimum dose rate it may be necessary to lower the thresholds for other measurements 1 The threshold start and stop levels are displayed in pA and are adjust able from 0 01 9 99 pA Use the Start Reset button to select the digit to adjust Use the arrow buttons to adjust the selected digit from 0 to 9 Both values must be larger than zero
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