19-4880; rev 11/09 DS9107 1 of 3 description the i button ? capsule is a mechanical enclosure to protect temperature logger i buttons (ds1921 and ds1922 series) from moisture, solvents and pressure. it provides ip68 protection to the i button inside (refer to application note 4126: understanding the ip (ingress protection) ratings of ibutton data loggers and capsule ). the protection level exceeds the ?water resistant 3 atm? requirements. the DS9107 consists of a base with the cavity for a f5 i button, a screw-in plug with o-ring to seal the enclosure, and a top with two stainless-steel screws to mount the i button capsule to a cable, e.g., to measure temperature at different levels within a liquid. the cable is inserted into the notch of the plug where it is held in place by the matching protrusion of the top piece. base, plug, and top are made of polyphenylene sulfide (pps). this material is chosen for its mechanical properties (remains stable during both long and short-term exposure to high temperatures), inherent flame resistance, and outstanding chemical resistance (inert to steam, strong bases, fuels and acids). although pps is virtually insoluble below 200c, it can be attacked by chlorinated hydrocarbons. the silicone o-ring matches the temperature and chemical qualities of the pps. in addition, it is resistant to sunlight, ozone, oxygen, and uv light. the chemical stability of the screws does not compromise that of the pps and the silicone. applications autoclave sterilization seawater temperature profiling monitoring of beverage production scientific research ordering information part description DS9107+ i button capsule +denotes a lead(pb)-free/rohs-compliant product. technical drawing 5.1 2.54 3.3 25.4 25.4 6.35 12.7 25.4 6.35 16.5 22.2 to p plu g o-ring base cavity for f5-size i button notch protrusion screws all dimensions are in millimeters. i button capsule www.maxim-ic.com i button is a registered trademark of maxim integrated products, inc.
DS9107: i button capsule 2 of 3 absolute maximum ratings temperature range -40c to +140c stresses beyond those listed under ?absolute maximum ratings? may cause permanent damage to the device. these are stress rating s only, and functional operation of the device at these or any other conditions beyond those i ndicated in the operational sections of t he specifications is not implied. exposure to the absolute maximum rati ng conditions for extended peri ods may affect device. specifications parameter conditions min typ max units weight empty 18.4 grams physical dimensions see technical drawing mm torque for tightening the plug (note 1) 36.5 nm number of open/close cycles maximum torque applied 500 ? number of autoclave cycles from 25c @ 101.3kpa (14.7psia) to 121c @ 205kpa (29.7psia), tightened to maximum torque (note 2) 100 ? thermal response time constant (note 3) 150 s note 1: equivalent to 2.5ft/lbs. note 2: absolute pressure is specified; the autoclave pea k pressure is 103.4 kpa (15 psig) above the standard atmospheric pressure. note 3: the value was derived from submerging an i button capsule with ds1922t inside into 55c water. the initial temperature of i button and capsule was 23.5c. without caps ule, the response time constant is approximately 30s. do not drop an unprotected i button into water or any other liquid. top, plug, base material: polyphenylene sulfide (pps ryton) with black flat finish, electr ically non-c onductive. the injection molding compounds (ryton? pps) used in the DS9107 are subject to the gener al safety provisions of the u.s. food, drug and cosmetic act. it is t he responsibility of the purchaser/user of the DS9107 i button capsule to determine the safety and suitability of the injecti on molding compounds for their specific application. o-ring material: s500-70 silicone compound, orange, fda approved. replacement o-rings: size as568-019, inner diameter 13/16 inch, outer diameter 15/16 inch, cross section 1/16 inch, nominal values. screws material: type 303 austenitic stainless-steel. replacement screws: flat-head phillips counte rsunk, self-tapping, m2.3, 9mm long. applications information the i button is inserted into the base part with the data cont act towards the bottom of the base. the plug is then placed into the base and initially tightened by hand. then the base is held with a wrench, and using a metal stick inserted horizontally into the notch of the plug, the plug is tightened until its he ad touches the top of the base. it is important not to exceed the maximum permissible torque. the i button capsule does not provide electrical contact to the i button inside. therefore it is necessary to setup (mission) the temperature logger first before inserting it into the i button capsule. to download the logged temperature data, the logger needs to be taken out of the i button capsule. ryton is a registered trademark of chevron phillips chemical company lp.
DS9107: i button capsule 3 of 3 maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a maxim product. no circu it patent licenses are implied. maxim reserves the right to change the circuitry and specifications without notice at any time. maxim integrated products, 120 san gabriel drive, sunnyvale, ca 94086 408-737-7600 ? 2009 maxim integrated products maxim is a registered trademark of maxim integrated products, inc . revision history revision date description pages changed 8/09 added the + sign to the part number in the ordering information table, indicating a lead(pb)-free/rohs-compliant package. 1 added a reference to the device?s ingres s protection rating and application note 4126. 1 11/09 added statement to note 3: ?do not drop an unprotected i button into water or any other liquid.? 2
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