User Manual - Far West Technology, Inc.
Contents
1. 4020 SHADOW 1 SPECIFICATIONS MECHANICAL Dimensions 3 x 6 1 4 x 1 5 8 75mm x 159mm x 40mm Weight 18 oz 500 grams Case Black Anodized Aluminum Detector 2 Pancake GM Tube OPERATIONAL Readout 2 Band Meter External Controls ON OFF ON WITH SPKR toggle switch Range toggle switch X1 X10 X100 500 5000 50 000 CPM Lamp push switch Internal Controls Calibrate adjustments X1 X10 X100 Radiation Detected Alpha beta gamma Xrays Range 0 500 0 5000 and 0 50 000 CPM Scale also calibrated for approximate gamma dose rates from the side 0 0 2 0 2 and 0 20 mR h Geiger Tube Voltage 950V Battery 9v Battery Life 500 hours QR Quick Response Time Constant X1 Slow 14sec Fast 1 3 sec X10 Slow 3 2 sec Fast 1 2 sec X100 1 sec Approximate Efficiencies 99Tc 25 90Sr 45 14C 12 Beeper Piezo Electric Beeps every count with power switch in ON WITH SPKR position beeps only at turn on in ON position Beeps at turn on if battery is good SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE MODEL 4020 SHADOW 2 INTRODUCTION The Shadow is a contamination survey meter that has an integral GM detector mounted on the bottom Itis a high quality simple to operate instrument suitable for both lab and field use OPERATION Your model 4020 Survey Meter is shipped fully assembled with batteries To get started Turn Power switch to ON with spkr The instrument should beep and the2. 555 5 28 _ ARSE Q T ea 90107 SK lt 8 7g 21 7 BEGY WL we 4 6 vey g 97 110 T i5 FO Wa slo 928 7 1 Roo 60 an lt SLO 5 Jo QOA elo WBA Yo JOA Slo 001 SA _ 252 XSNOAS tiy yo vign 1 95 990 a sn 2 12 oy sre Oly oder 19 3 328 9 son a i gt 226 23 lt 9 3 990 A ape 1251 x WL N LW 129711 7 RY 3 20 gt Ay ou 9 12 9997 In SOA ee 2 2 ass SYN 258 SSS PFR 5 10 z up 8 JOA sT KG 2 2950 13535 pere 5 SOA
3. Instrument should be examined and tested as soon as received by Buyer Claims for damage if any should be filed at once with the carrier MODEL 4020 SHADOW 6 744 1KM MOUNTED ABOVE OTHER COMPONENTS INSULATE LEADS 4 DIODES FR 107 005 1KV f LINE UP u Rio 122950 BLACK LEAD RESISTOR PARTS PLACEMENT MODEL 4020 SHADOW REDLEAD FROM BATTERY 300930 391V MODEL 4020 SHADOW 80192130 122711 tha 55 a I AN Sty tron pet S ven pE Ey 25 15 S 817 gid XA 25 Te lt T T 10 13535 HOLIMS ot ole lo Slo male 282 zid usd 3 ae 15 vig NO JON OLN Pe S a lt 2 SOA 55 over yess 4 5 T 3 123 9 og 84A 7 os DOA S ofo 3 558
4. MODEL 4020 SHADOW SURVEY METER MANUAL SEPTEMBR 1998 Health Physics Instruments 330 D South Kellogg Ave Goleta CA 93117 Tel 805 964 3615 FAX 805 964 3162 Division of Far West Technology TABLE OF CONTENTS SPECIFICATIONS 2 2 OPERATIONAL a a aaa a E a 2 INTRODUCTION 3 OPERATION 3 FEATURES 3 FUNCTIONS 3 POWER SWITCH ameuter a e aaa EEEE aE S a a 3 RANGE ct vaca de retuci dat sucuda ct tucnuecisuvaduoiasusuuceraveoucevevsaucorewvausdsesveuvaresvanueresvaasuoieu sacle 4 LIGHT 4 4 MAINTENANCE AND ADJUSTMENT 5 BATTERY CHANGE wissccciccscosetvevsesccvevveicvesventcdcusastcesesvouteseoutdeasesvgnicevadvatestedvadustesveuted uauouedtervauedieuveuseies 5 5 WARRANTY 6 SCHEMATIC 7 CAUTION THE THIN WINDOW GM DETECTOR BEHIND THE SCREEN ON THE BOTTOM OF THE INSTRUMENT IS EASILY BROKEN THIS DETECTOR IS EXPENSIVE CARELESS HANDLING WILL RESULT IN AN UNNECESSARY EXPENSE OF BUYING A NEW DETECTOR MODEL
5. ates that the battery is good If the speaker does not beep then the battery needs replacing Also at turn the meter will automatically display the battery condition for about 3 seconds How high into the BATT OK section of the meter the pointer moves is an indication of the condition of the battery MODEL 4020 SHADOW 3 RANGE SWITCH The Range switch is a three position switch that switches the range for the meter In the up position x 1 the instrument is reading the scale on the meter both in CPM and mR h In the middle position x 10 the meter is reading 10 times the value printed the scale Full scale is 5000 CPM or mR h In the bottom position 100 the meter is reading 100 times the value printed on the scale Full scale is 50 000 CPM or 20 mRP h LIGHT SWITCH The Light Switch turns on the yellow light above the meter Push it to turn on the light Release to turn the light off SPEAKER The speaker is located behind the hole above the meter It beeps at turn on to indicate a good battery and if the Power switch is in the lower position of ON with spkr the speaker will beep with each pulse from the GM Detector SPEAKER POWER SWITCH A a RANGE SWITCH BATTERY COVER Fig 1 Front Panel Controls MODEL 4020 SHADOW 4 MAINTENANCE AND ADJUSTMENT BATTERY CHANGE The Model 4020 requires a single 9 volt battery You can use any type of 9 v
6. gs our MODEL 4020 SHADOW 5 TEST POINT X10 1 X100 Fig 2 Battery box and Calibration WARRANTY HPI equipment is warranted to the original purchaser only to be free from defects in materials and workmanship for a period of one year from date of shipment unless otherwise defined in the applicable product data sheet Under this warranty equipment which has been properly installed and operated and not subject to misuse misapplication or abuse but becomes defective will be repaired by us at our factory or replaced at the option of HPI and Buyer will pay only the cost of freight plus custom and broker fees where applicable and in transit insurance to and from HPI Of course expendable supplies such as batteries and easily damaged items such as thin window Geiger tubes if broken are not within the warranty Except for the warranties specifically set forth herein there shall be no other warranties whether express implied or statutory including implied warranties of merchantability or fitness In addition it is expressly agreed by Buyer in purchasing the goods that the liability of HPI if any shall be limited solely to the replacement and repair of the goods in accordance with the warranties specifically and expressly set forth herein and HPI shall not be liable for loss of use of the equipment for other incidental or consequential costs expenses or damages incurred by Buyer NOTE
7. meter will read upscale After about 3 seconds the meter should read the proper amount of radiation Put the Range switch on x1 and the meter should move to about 50 CPM which is normal background radiation FEATURES The shadow incorporates a QR quick response meter circuit that eliminates the need for a reset or time constant switch The meter will move quickly to near the correct value then slow down as it approaches the value This reduces the meter fluctuations at low counting rates while still responding quickly to significant changes in the counting rate Another feature of the meter is the antisaturation circuit that will not let the meter fail in high radiation levels The long battery life of 500 hours is enough time to operate the meter for about a year at 2 hours a day and the automatic battery check warns of a low battery when it does happen The compact size allows the shadow to be carried and operated with one hand a strong consideration when doing extended surveys when the other hand may be busy FUNCTIONS In this section we will discuss the three controls and how they operate the instrument POWER SWITCH The power switch is a three position switch In the center position the instrument is turned off In the upper position the instrument is turned on without the speaker In the bottom position the instrument is turned on with the speaker When the instrument is first turned on the speaker will beep This indic
8. olt battery that will fit To replace the battery turn the instrument off and unscrew the four screws on the battery cover that is on the front panel Remove the cover Remove the battery and replace with a fresh one observing the polarity marked on the holder Replace the cover CALIBRATION The only user calibration is the sensitivity of the three ranges for the meter The instrument is designed to measure contamination and therefore should be calibrated in counts per minute A pulse generator with a range of 400 to 55 000 counts minute is needed The calibration is done as follows 1 Turn the instrument off and remove the battery cover 2 Clip the ground lead to the minus side of the battery and the hot or signal lead to the test point visible inside the case on the circuit board Turn the instrument on Set the Range switch to X1 Set the pulse generator to 8 volt pulses and 400 CPM Adjust the X1 calibration to the left of the battery holder so the meter reads 400 CPM 7 Set the Range switch to X10 8 Set the pulse generator to 4000 CPM 9 Adjust the X10 calibration so the meter reads 4000 CPM 10 Set the Range switch to X100 11 Set the pulse generator to 40 000 12 Adjust the X100 calibration to 40 000 CPM This completes the Calibration A complete calibration would also note the reading of the meter to 100 1000 10 000 and 55 000 off scale CPM Remember to subtract background on the low readin
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