SYSTEM DESCRIPTION and INTENDED USE
Contents
1. 12 BASIC SYSTENLOPERATIONDN ciscsessseusscsoV Haa e eee epe SS FREE en eae E ERES UNES SERERE ERES ERES PENES nsi 12 BATTERY REPLACENIEN sccscasccdusssesessssececseunsecarscceccstusesssensbeadeasesadivesensevestasesasasesaucesssoasisaenass 15 THEORY OF OPERA LION scrani ii EE a E EE SES 16 CALIBRA TON m HH 17 IEEE PLZ DION T 18 EBIS818 HP NOLO OU Orc 20 WY ARRAN Hl la 21 INCU LED 22 SR Instruments Inc 600 Young Street Tonawanda NY 14150 Tel 716 693 5977 Fax 716 693 5854 URL www srscales com email sri srinstruments com Copyright 2013 SR Instruments Inc Model SR255 Daily Weigh Scale Operating and Service Manual S N 3616 Part No MAN255 130628 Page 3 of 23 TABLE OF FIGURES Figure 1 Assembled SR255 Daily Weigh Scale eee eee eee eee eee eee eee eese eene essaus 6 Eioure2 Stretcher Cup Installed secre ctevasverenscacecaeessexsnecculesteouseensescsiansanieveteuvalestiostecaiesssisuaccineas 6 I1eure 3 Mast Placement ANG Sere W asssdssscscsessseassaccssacsecescassaccncscasdedeaisacsacsdaeseseassaesncscssdedeatsacenecds 7 Figure 4 Spreader Bar Connected in Receptacle ccccscccccssscssssssssssssssssss2. ccce ecce eere ee eee eee eee eene nun 18 SR Instruments Inc 600 Young Street Tonawanda NY 14150 Tel 716 693 5977 Fax 716 693 5854 URL www srscales com email sri srinstruments com Copyright 2013 SR Instruments Inc Model SR255 Daily Weigh Scale Operating and Service Manual S N 3616 Part No MAN255 1300628 PACKING CHECKLIST SR255 ADULT DESCRIPTION Box 1 T BOOM MAST with INVACARE LIFTER 1 4 20 x 1 SOCKET HEAD CAP SCREW for Mast Assy INVACARE LIFTER BASE A 3 8 16 x 1 4 SHOULDER BOLT for T Boom Pump Assy WASHER for T Boom Pump Assy 3 8 16 LOCK NUT for T Boom Pump Assy SPREADER BAR TRANSDUCER TUBE 6 32 x SOCKET HEAD CAP SCREW Safety Screw Transducer Assy STAPH CHECK STRETCHER 32 x 72 STRETCHER CUP DISPLAY BATTERY BOX pre attached to mast SIX 6 D CELL BATTERIES A FRAME 3 8 16 x 2 4 SHOULDER BOLT for A Frame Assy 3 8 16 LOCK NUT for A Frame Assy 3 16 ALLEN WRENCH 7 64 ALLEN WRENCH 72 OPEN END WRENCH Box 2 STRETCHER BARS 72 HARDWARE NOTE All hardware is already in position and finger tight No nuts bolts or screws are packaged separately QUANTITY lea lea lea lea lea lea lea ea 2 ea ea ea lea 6ea 2ea 2ea 2ea lea lea lea 2ea SR Instruments Inc 600 Young Street Tonawanda NY 14150 Tel 716 693 5977 Fax 716 693 5854 URL www srscales com emai
3. BOUES Boom so the patient can be safely moved DO NOT ATTEMPT TO TRANSPORT PATIENT VIA THE SCALE STEP 6 Itis recommended that you re zero before each weighing to ensure optimal accuracy NOTE Do not touch patient stretcher or circular A Frames during the weighing process By design these components are weight sensitive and any interference will affect the accuracy of the weight data WARNING DO NOT USE FOR PATIENT TRANSPORT MAXIMUM 400 LB 181 KG CAPACITY SPREAD THE LEGS OF THE LIFTER BASE PRIOR TO LIFTING AND WEIGHING PATIENT Failure to spread the legs prior to suspending patient could bend legs or cause lifter to tip over and injure patient and or attendant DO NOT USE THE PUMP HANDLE TO MANEUVER THE SCALE SR Instruments Inc 600 Young Street Tonawanda NY 14150 Tel 716 693 5977 Fax 716 693 5854 URL www srscales com email sri srinstruments com Copyright 2013 SR Instruments Inc Model SR255 Daily Weigh Scale Operating and Service Manual S N 3616 Part No MAN255 130628 Page 15 of 23 BATTERY REPLACEMENT STEP 1 The display will read CHANGE BATTERY when the batteries are low STEP 2 Unscrew the four 4 screws and open the Battery Compartment Cover on the front of the Display Unit STEP 3 Remove and replace ALL six 6 D cell batteries Refer to diagram in the battery compartment for placement STEP 4 Press the WEIGH button to confirm display is working STEP 5 Replac
4. Part No MAN255 1300628 Page 11 of 23 SPECIFICATIONS MAXIMUM WEIGHT CAPACITY 400 Ib or 181 kg STRETCHER SIZE DISPLAY TYPE DISPLAY RESOLUTION ACCURACY AUTO ZERO AUTO POWER DOWN HOLD LAST WEIGHT RECALL AVERAGING POWER SUPPLY CALIBRATION OPERATING CONDITIONS TRANSPORT and STORAGE Adult 32 1n x 72 in Pediatric 32 in x 60 in 16 Character dot matrix LCD 0 1 Ib or 0 1 kg 0 1 1 digit of displayed resolution for calibrated range One button operation After 35 seconds While active freezes display data and stores it in memory Hold button recalls last stored weight Automatic digital filter Six 6 D cell batteries Calibration 1s traceable to NIST standards Normal operating conditions for this product Temperature Range 68 F to 85 F 20 C to 30 C Relative Humidity Range 0 85 Avoid exposure to high pressure water or steam Storage and transport conditions should not vary outside the following conditions Relative Humidity 0 to 85 Ambient Temperature 14 F to 122 F 10 C to 50 C Remove batteries if storing longer than three 3 months SR Instruments Inc 600 Young Street Tonawanda NY 14150 Tel 716 693 5977 Fax 716 693 5854 URL www srscales com email sri srinstruments com Copyright 2013 SR Instruments Inc Model SR255 Daily Weigh Scale Operating and Service Manual S N 3616 Part No MAN255 130628 Page 12 of 23 BUTTON FUNCTIONS Press bo
5. Pump is a factory sealed unit and microprocessor circuitry and strain MUST be returned for service gauge sensors that may be adversely affected by exposure to such an environment SR Instruments Inc 600 Young Street Tonawanda NY 14150 Tel 716 693 5977 Fax 716 693 5854 URL www srscales com email sri srinstruments com Copyright 2013 SR Instruments Inc Model SR255 Daily Weigh Scale Operating and Service Manual S N 3616 Part No MAN255 130628 Page 10 of 23 STORAGE and TRANSPORTATION STORAGE If storing this equipment for periods longer than three 3 months remove the batteries To maintain proper operation of this instrumentation storage and transport conditions should not vary outside the following conditions Relative humidity 0 to 85 Ambient Temperature 14 F to 122 F 10 C to 50 C TRANSPORTATION To transport the SR255 Daily Weigh Scale from one location to another within the building remove the Stretcher from the Stretcher Bar Hooks roll up and place in the Stretcher Cup located at the base of the scale and behind the Stretcher Bracket located behind the Display Box Figure 11 Stretcher Cup Receptacle for Transporting Scale SR Instruments Inc 600 Young Street Tonawanda NY 14150 Tel 716 693 5977 Fax 716 693 5854 URL www srscales com email sri srinstruments com Copyright 2013 SR Instruments Inc Model SR255 Daily Weigh Scale Operating and Service Manual S N 3616
6. SR255 Daily Weigh Scale STEP 1 Unpack the scale system and check parts 1 Invacare Lifter Base against the PACKING CHECKLIST If there are any 2 missing or damaged parts please call the Service 3 Hotline 1 800 654 6360 STEP 2 Figure 1 Verify that the serial number on 5 the Display Unit 3 matches that on the Transducer Transducer Bar T Boom Bar 6 Connection STEP 3 Figure 2 Attach 7 the Stretcher Cup 15 to the Invacare Lifter Base 1 snapping it into place and 10 twisting the lower tab back 11 under the Mast 12 past the 12 lower bolt 13 14 15 Stretcher Cup y Figure 2 Stretcher Cup Installed Continued next page SR Instruments Inc 600 Young Street Tonawanda NY 14150 Tel 716 693 5977 Fax 716 693 5854 URL www srscales com email sri srinstruments com Copyright 2013 SR Instruments Inc Model SR255 Daily Weigh Scale Operating and Service Manual S N 3616 Part No MAN255 130628 Page 7 of 23 Figure 3 Mast Placement and Screw Figure 5 T Boom Lifter Pump Connection Figure 7 Transducer Cable Connection ASSEMBLY Cont d STEP 4 Figure 3 Loosen the 1 4 20 x 1 in Socket Head Cap Screw 14 found on the mast receptacle Insert Mast 12 into Invacare Lifter Base 1 as shown The bottom of the Mast is slotted When properly set the Mast will drop into place The Display Unit 4 3 will face away from the lifter legs and be perpendicular to the
7. a drop will accumulate around the piston from time to time and 1s normal Button may not have bounced back up after being pressed Remove the label facing and inspect buttons Make sure the rubber boot is not sitting too high Re attach label Check to ensure batteries are installed correctly see directions for BATTERY REPLACEMENT Check transducer and readout cables to make sure they are connected securely Check to ensure the transducer wire 1s intact A broken transducer wire or a bad T Boom cable can cause this reading This happens when the ICS fails For repair information see INITIALIZATION PROCE DURE This is acceptable behavior and is not considered a watranty issue It could take up to 30 Ibs of downward force to lower the boom arm This type of scenario implies that there could be air bubbles trapped in the system that could have been created by a Closing the Lock Release Lever Arm and forcing the pump handle upward without using the pump handle and or b during the shipping process Possible Remedy Please try the following 1 Close the Lock Release Lever Arm and use the pump handle to raise the boom until it stops 2 open the Lock Release Lever Arm and slowly lower the boom arm with the required force until the boom stops 3 repeat steps 1 and 2 two more times This is not a warranty issue and the oil may be removed with a facial tissue For additional information or assistance telep
8. assumes nor authorizes any other person to assume for SR Instruments Inc any other liabilities in connection with the sale of said articles In no event shall SR Instruments Inc be liable for any subsequent or special damages Any misuse improper installation or tampering shall void this warranty DAMAGED SHIPMENTS Title passes to purchaser upon delivery to Transportation Company Any claims for shortage or damage should be filed with the delivery carrier by purchaser RETURN POLICY All products being returned to SR Instruments Inc require a Return Goods Authorization number RGA To receive an RGA call our Technical Service Team at 716 693 5977 or toll free 1n the USA and Canada at 800 654 6360 When inquiry is made please supply model and serial numbers purchase order if the scale was bought on contract and reason for return Generally deleted damaged and outdated merchandise will not be accepted for credit A minimum restocking charge of 15 will be assessed on return of current merchandise All returns are to be shipped FREIGHT PREPAID to SR Instruments Inc 600 Young Street Tonawanda NY 14150 RESTOCKING FEE e 15 fee for any scale that has been opened and used e 10 fee for any scale returned that has been ordered incorrectly or refused delivery with no model change e 5 fee if an error in ordering has been made and a different model exchanged e No fees will be charged if the scale is returned because o
9. 0 000 weight readings before needing replacement This eliminates the need for an external battery charger or the danger of an AC power supply cord on a portable scale The patient s weight 1s displayed on a 16 character dot matrix LCD With a push of a button weight data may be viewed in either pounds or kilograms with a displayed resolution of 0 1 Ib or 0 1 kg INTENDED USE The SR255 Daily Weigh Scale is WARNING designed for use as a patient weighing system for non ambulatory patients only Please read the following DO NOT USE FOR PATIENT TRANSPORT warnings to avoid injury to the patient MAXIMUM 400 LB 181 KG CAPACITY M ro M M ooo SPREAD THE LEGS OF THE LIFTER BASE Weigh Scale is a preferred means of PRIOR TO LIFTING AND WEIGHING gathering patient weight data of non TU PATIENT ambulatory patients weighing up to 400 pounds The transducer bar using load B DO NOT USE THE PUMP HANDLE TO cell technology ensures accurate and MANEUVER THE SCALE repeatable weight readings Failure to spread the legs prior to suspending patient could cause lifter to tip over and injure patient and or attendant MAINTENANCE and CLEANING Exercise caution when cleaning the display window as it is made of clear polyester and can be scratched by WARNING abrasive cleaners Mild soap and water is recommended for general cleaning and disinfecting DO NOT use pressurized water b steam The scale system contains The Hydraulic
10. Invacare Lifter Base Tighten Socket Head Cap Screw to secure STEP 5 Figure 4 Insert the Spreader Bar 2 into the receptacle at the base of the Mast 12 Secure tightly with screw which is shipped finger tight in place on Invacare Lifter Base STEP 6 Figure 5 Attach and securely tighten the rod end of the Lifter Pump 7 to the T Boom 5 using 3 8 16 x 1 in shoulder bolt washer and 3 8 16 lock nut All are shipped finger tight in place on T Boom Also tighten the Mast T Boom hinge lock nut securely STEP 7 Figure 6 Hang the Transducer Bar from the end of the T Boom Label on the Transducer Bar must face away from unit Tighten safety screws as shown to prevent separation of T Boom and Transducer Bar STEP Figure 7 Plug in the transducer cable to the receptacle on the top end of the T Boom STEP 9 Figure 8 Attach the two 2 A Frames 8 to each end of the Transducer Bar using the two 2 3 8 16 x 2 in shoulder bolts and two 2 3 8 16 locknuts Tighten securely Figure 4 Spreader Bar Connected in Receptacle Figure 6 Transducer Connected to T Boom Figure 8 Transducer A Frame Connected Continued next page SR Instruments Inc 600 Young Street Tonawanda NY 14150 Tel 716 693 5977 Fax 716 693 5854 URL www srscales com email sri srinstruments com Copyright 2013 SR Instruments Inc Model SR255 Daily Weigh Scale Operating and Service Manual S N 3616 Part No
11. MAN255 130628 Page 8 of 23 ASSEMBLY Cont d STEP 10 Figure 9 Slide the stretcher bars into the sides of the Stretcher 10 by opening the Velcro tabs and inserting the stretcher bars Re seal the ends When not in use store the Stretcher in the Stretcher Cup 15 at the base of the unit and tuck into the Stretcher Bracket 4 attached to the Display to hold it upright STEP 11 Figure 10 The Stretcher attaches to the A Figure 9 Velcro F bes Fae Ine booked ends fh h the f Figure 10 A Frame End of Stretcher Bar pale o THOSE SIE eee CH MOUE OU Hook Placement on Channel on Stretcher holes in the Stretcher Stretcher REPLACEMENT PARTS and ACCESSORIES SR Instruments Inc 600 Young Street Tonawanda NY 14150 Tel 716 693 5977 Fax 716 693 5854 URL www srscales com email sri srinstruments com Copyright 2013 SR Instruments Inc Model SR255 Daily Weigh Scale Operating and Service Manual S N 3616 Part No MAN255 130628 Page 9 of 23 SYSTEM DESCRIPTION and INTENDED USE SYSTEM DESCRIPTION The SR255 Daily Weigh Scale employs the latest in microprocessor and load cell technology to provide accurate and repeatable weight data Two 2 identically matched transducers are strategically placed to ensure an accurate representation of the patient s weight The low power microprocessor circuitry allows the SR255 to derive its power from six 6 common D cell batteries that will provide up to 1
12. Model SR255 Daily Weigh Scale Operating and Service Manual S N 3616 Part No MAN255 130628 Page 1 of 23 SR Scales by SR Instruments Inc Model SR255 Daily Weigh Scale Operating and Service Manual Serial Numbers 3616 SR Instruments Inc 600 Young Street Tonawanda NY 14150 Tel 716 693 5977 Fax 716 693 5854 URL www srscales com email sri srinstruments com Copyright 2013 SR Instruments Inc Model SR255 Daily Weigh Scale Operating and Service Manual S N 3616 Part No MAN255 130628 Page 2 of 23 TABLE OF CONTENTS d OT OR BUG URES c 3 PACKING CHECKLIST 5R25 5 AID UL E tesisssssssasecsssssissvesscsosesssssssosesseasescsdesssesevecnosncssssstesessens 4 PACKING CHECKLIST SR255 PEDIATRIC 2000000 ccccssccccrccrccccccssccccsccccccssssssccees 5 ASSEMBLY MT 6 REPLACEMENT PARTS AND ACCESSORIES ecce eee eee eee eee ette etes sonos osos esses eese eeoo 8 SYSTEM DESCRIPTION AND INTENDED USE esssssssseecssssssssssecssssssossosecssssssossssesssssssssssse 9 MAINTENANCE AND CLEANING cite Ih ER E PERS eEMEE EE YYIE EFE ERE PERE onanii roan S PE inado VERE PN ERE REOR CER KITE PASOS 9 STORAGE AND TRANSPORTATION ssscsssesasescsssscevssdssissudesssecssasssescossianoedsssdetssessansoaessdedsssssenns 10 SPREK ATION c 11 BU ETON B LOU LO o
13. al Calibration Buttons and Offset Potentiometer STEP2 Figure 16 The Calibration buttons are located CALIBRATION internally on the PC Board as indicated Press the internal calibration TOLERANCE TABLE anne and SW6 simultaneously to put system into LOW APPLIED HIGH icicles LIMIT LOAD LIMIT STEP 3 The display will read HOLD TO CAL as the digit in the right hand corner counts down from 9 to 0 The display os nue will then read CALIBRATION and periodically flash this on the display In the far left corner of the display the letters CAL will appear EZA 399 6 400 0 400 4 oe mo or Continued next page SR Instruments Inc 600 Young Street Tonawanda NY 14150 Tel 716 693 5977 Fax 716 693 5854 URL www srscales com email sri srinstruments com Copyright 2013 SR Instruments Inc Model SR255 Daily Weigh Scale Operating and Service Manual S N 3616 Part No MAN255 130628 Page 18 of 23 CALIBRATION Cont d CAUTION The integrated circuits and semiconductors on the printed circuit boards may be damaged by electrostatic discharge ESD Be sure to use proper handling precautions at all times STEP 4 System offset is displayed on the right side of the screen and should read between 35 and 40 pounds Use a fine blade screwdriver to adjust Offset Potentiometer R13 STEP 5 When in CAL mode press the ZERO button to zero the display STEP 6 Center a known calibrated we
14. and start a new averaging period The micro controller can be placed in a calibration mode where the system can be re calibrated In the calibration mode the result of the weigh operation is scaled to match the value by adjusting the up and down calibration buttons This new calibration factor is then stored in the non volatile memory SR Instruments Inc 600 Young Street Tonawanda NY 14150 Tel 716 693 5977 Fax 716 693 5854 URL www srscales com email sri srinstruments com Copyright 2013 SR Instruments Inc Model SR255 Daily Weigh Scale Operating and Service Manual S N 3616 Part No MAN255 130628 Page 17 of 23 CALIBRATION IMPORTANT CALIBRATION CHECK Qualified service personnel only should perform this procedure Load cells have no user serviceable components and should not be tampered with for any reason Re calibration is generally not required but should be verified periodically to ensure accuracy The recommendation for calibration check is at least once every 12 months or as individual maintenance policy requires NOTE Ensure that nothing is in contact with the scale system during this procedure Remove hands from the system when noting the displayed Serene E calibration results STEP 1 Figure 15 Remove the four 4 screws on the back of the display housing Figure 15 PC Board Access Cover SES P ACC Fr a exey c20 H Lue yl Figure 16 Location of Intern
15. e STEP2 Figure 12 SPREAD LEGS ON PATIENT LIFTER BEFORE ATTEMPTING TO LIFT THE PATIENT Figure 12 Lifter Legs Opened Closed Continued next page SR Instruments Inc 600 Young Street Tonawanda NY 14150 Tel 716 693 5977 Fax 716 693 5854 URL www srscales com email sri srinstruments com Copyright 2013 SR Instruments Inc Model SR255 Daily Weigh Scale Operating and Service Manual S N 3616 Part No MAN255 130628 Page 14 of 23 BASIC SYSTEM OPERATION Cont d STEP3 Figure 13 To RAISE the T Boom the Lock Release Lever on the lifter must be in the LOCK position left Pump the handle To LOWER the T Boom the Lock Release lever on the lifter must be in the RELEASE position right Patient s weight will slowly lower the T Boom STEP 4 With the T Boom raised roll the scale forward so the two 2 A Frames are centered over the patient DO NOT USE THE PUMP HANDLE TO MANEUVER THE SCALE Lower the T Boom and attach the A Frame hooks into the Stretcher holes Move the lever into the LOCK position DO NOT EXCEED THE MAXIMUM CAPACITY OF 400 LB 181 KG STEP 5 When the Stretcher is securely attached pump handle until the patient is raised just enough to clear the bed and any linens etc Weigh patient and when finished lower back on to the bed by moving the Lock Release Lever to RELEASE right Patient s weight will Figure 13 Lifter LOCK lower the Stretcher slowly Unhook the Stretcher and again raise the T
16. e the Battery Compartment Cover and replace the four 4 screws STEP 6 Zero the system Figure 14 Battery Compartment Cover SR Instruments Inc 600 Young Street Tonawanda NY 14150 Tel 716 693 5977 Fax 716 693 5854 URL www srscales com email sri srinstruments com Copyright 2013 SR Instruments Inc Model SR255 Daily Weigh Scale Operating and Service Manual S N 3616 Part No MAN255 130628 Page 16 of 23 THEORY OF OPERATION SR Instruments patient weighing systems are digital scales Strain gauge force cells convert the force of an applied weight into an analog signal This signal is amplified by an operational amplifier and converted to a digital signal by an analog to digital converter The digital signal is transferred to a micro controller where it is filtered converted to appropriate units and displayed on a liquid crystal display Strain gauge force cells each contain four strain gauges mounted in a full Wheatstone bridge configuration These bridges convert the physical movement of the force cell due to the applied mass on the system into minute changes in electrical resistance These changes in resistance produce a voltage difference across the Wheatstone bridge which is amplified by the operational amplifier The amplifier 1s configured to current sum the output of each cell with potentiometers serving to adjust the sensitivity voltage out per unit of weight applied of each bridge The offset potentiomet
17. er produces a small current which nulls the output of the amplifier for an unloaded system The output of the operational amplifier 1s digitized by the analog to digital converter The converter integrates the analog signal onto the integrating capacitor over a short interval The integrating capacitor is then discharged at a rate proportional to the reference voltage applied to the converter The residual voltage on the integrating capacitor 1s then multiplied by a factor and again discharged at a rate proportional to the reference voltage The residual voltage from this discharge is again multiplied by a factor and again discharged The time taken to discharge the capacitor 1s proportional to the voltage from the operational amplifier which is proportional to the applied load on the force cells The time is stored as a binary number in the analog to digital converter and is transferred to the micro controller when the conversion is complete The micro controller averages and filters the digital output of the analog to digital converter subtracts the value saved during the system zero operation and scales the filtered output then displays the result on the liquid crystal display The micro controller performs a rolling average of data for continuous weigh and for AutoHold the micro controller averages the data before locking in on the reading If the data variance is greater than 0 1 in the AutoHold mode the micro controller will reset the filter
18. f an error on the part of SR Instruments Inc e No returns accepted after 60 days SR Instruments Inc 600 Young Street Tonawanda NY 14150 Tel 716 693 5977 Fax 716 693 5854 URL www srscales com email sri srinstruments com Copyright 2013 SR Instruments Inc Model SR255 Daily Weigh Scale Operating and Service Manual S N 3616 Part No MAN255 130628 Page 22 of 23 NOTES SR Instruments Inc 600 Young Street Tonawanda NY 14150 Tel 716 693 5977 Fax 716 693 5854 URL www srscales com email sri srinstruments com Copyright 2013 SR Instruments Inc Model SR255 Daily Weigh Scale Operating and Service Manual S N 3616 Part No MAN255 130628 Page 23 of 23 SR Scales By SR Instruments Inc Precision amp Technology in Perfect Balance SR Instruments Inc 600 Young Street Tonawanda NY 14150 Tel 716 693 5977 Fax 716 693 5854 URL www srscales com email sri srinstruments com Copyright 2013 SR Instruments Inc
19. hone our Service Hotline 1 800 654 6360 or e mail sri srinstruments com SR Instruments Inc 600 Young Street Tonawanda NY 14150 Tel 716 693 5977 Fax 716 693 5854 URL www srscales com email sri srinstruments com Copyright 2013 SR Instruments Inc Model SR255 Daily Weigh Scale Operating and Service Manual S N 3616 Part No MAN255 130628 Page 21 of 23 WARRANTY 2 YEAR LIMITED WARRANTY Each SR 3 amp 5 system is manufactured with high quality components SR Instruments Inc warrants that all new equipment will be free from defects in material or workmanship under normal use and service for a period of two 2 years from the date of purchase by the original purchaser Normal wear and tear injury by natural forces user neglect and purposeful destruction are not covered by this warranty Warranty service must be performed by the factory or an authorized repair station Service provided on equipment returned to the factory or authorized repair station includes labor to replace defective parts Goods returned must be shipped with transportation and or broker charges prepaid SR Instruments Inc s obligation 1s limited to replacement of parts that have been so returned and are disclosed to SR Instruments Inc s satisfaction to be defective The provisions of this warranty clause are in lieu of all other warranties expressed or implied and of all other obligations or liabilities on SR Instruments Inc s part and it neither
20. ight traceable to NIST on the stretcher and compare to display reading STEP 7 Adjust the reading using the or buttons to match the weight Display should be within 0 1 of the calibrated weight See Calibration Tolerance Table STEP Remove the weight and re zero Repeat steps 5 6 and 7 until correct STEP 9 When settings are completed Press the HOLD button to SAVE the settings or press the WEIGH button to CANCEL Both choices will EXIT the CAL mode INITIALIZATION INITIALIZATION PROCEDURE To be used ONLY IF REPLACING IC5 or if DISPLAY READS DOUBLE Internal Initialization Buttons d LEDI L 6 B q b d Gws SWE CRE leg D 45uitrh Side R20 CY ini ge A e 1 IC Tm s i G R12 3 i T TE ex m I GU i Conponent Side Figure 17 Location of Internal Initialization Buttons Continued next page SR Instruments Inc 600 Young Street Tonawanda NY 14150 Tel 716 693 5977 Fax 716 693 5854 URL www srscales com email sri srinstruments com Copyright 2013 SR Instruments Inc Model SR255 Daily Weigh Scale Operating and Service Manual S N 3616 Part No MAN255 130628 Page 19 of 23 INITIALIZATION Cont d STEP 1 Remove the four 4 screws on the back of the display housing Figure 17 The Initialization Buttons SW2 and SWS are located internally on the PC Board as indicated STEP 2 Simultaneously press buttons indicated to initialize the syste
21. l sri srinstruments com Copyright 2013 SR Instruments Inc Model SR255 Daily Weigh Scale Operating and Service Manual S N 3616 Part No MAN255 130628 Page 5 of 23 PACKING CHECKLIST SR255 PEDIATRIC DESCRIPTION Box 1 T BOOM MAST with INVACARE LIFTER ea 1 4 20 x 1 SOCKET HEAD CAP SCREW for Mast Assy ea INVACARE LIFTER BASE lea y QUANTITY 3 8 16 x 1 4 SHOULDER BOLT for T Boom Pump Assy l ea WASHER for T Boom Pump Assy lea 3 8 16 LOCK NUT for T Boom Pump Assy lea SPREADER BAR lea TRANSDUCER TUBE lea 6 32 x SOCKET HEAD CAP SCREW Safety Screw Transducer Assy STAPH CHECK STRETCHER 32 x 60 lea STRETCHER CUP lea DISPLAY BATTERY BOX pre attached to mast lea SIX 6 D CELL BATTERIES A FRAME 2ea 6 ea 2 ea 3 8 16 x 2 4 SHOULDER BOLT for A Frame Assy 2 ea 3 8 16 LOCK NUT for A Frame Assy 2 ea 3 16 ALLEN WRENCH ea 7 64 ALLEN WRENCH ea 5 OPEN END WRENCH ea Box 2 STRETCHER BARS 60 2 ea HARDWARE NOTE All hardware is already in position and finger tight No nuts bolts or screws are packaged separately SR Instruments Inc 600 Young Street Tonawanda NY 14150 Tel 716 693 5977 Fax 716 693 5854 URL www srscales com email sri srinstruments com Copyright 2013 SR Instruments Inc Model SR255 Daily Weigh Scale Operating and Service Manual S N 3616 Part No MAN255 130628 Page 6 of 23 ASSEMBLY Figure 1 Assembled
22. m The display will read HOLD TO INIT and count down from 9 to 0 When the initializing 1s complete the display will read INITIALIZING and then return to the WEIGH mode STEP 3 Follow the CALIBRATION procedure CAUTION The integrated circuits and semiconductors on the printed circuit boards may be damaged by electrostatic discharge ESD Be sure to use proper handling precautions at all times SR Instruments Inc 600 Young Street Tonawanda NY 14150 Tel 716 693 5977 Fax 716 693 5854 URL www srscales com email sri srinstruments com Copyright 2013 SR Instruments Inc Model SR255 Daily Weigh Scale Operating and Service Manual S N 3616 Part No MAN255 1300628 Page 20 of 23 TROUBLESHOOTING REASON CORRECTIVE ACTION Press the WEIGH button or remove one battery Wait five seconds then re install the battery and try the WEIGH button again SYMPTOM The characters only appear on half of the display The display lights appear to work but does not respond to button activation The display shows no reading at all The display reads WEIGHT OVERLOAD The display shows a double weight reading The pump could stay in the upright position until a downward force is applied If when boom is moved downward there are sticking points where the force to lower is much greater and downward motion is erratic and not smooth A small amount of hydraulic oil about
23. ore performing the ZERO function so they will not be included in the patients weight Continued next page SR Instruments Inc 600 Young Street Tonawanda NY 14150 Tel 716 693 5977 Fax 716 693 5854 URL www srscales com email sri srinstruments com Copyright 2013 SR Instruments Inc Model SR255 Daily Weigh Scale Operating and Service Manual S N 3616 Part No MAN255 130628 Page 13 of 23 BASIC SYSTEM OPERATION Cont d CONTINUOUS WEIGH In this default mode the weighing surface remains active Press the HOLD button once to lock the displayed reading and store it in memory as the last weight for recall later if needed AUTO HOLD This mode is for patients unable to remain still for the weighing procedure It locks stores and displays the patient s weight as soon as the WEIGH button is pressed once Note No weight will be displayed until the button is pressed To enable this mode BEFORE zeroing the system press and hold the HOLD button for approximately five 5 seconds until the display reads AUTO HOLD ENABLED To return to CONTINUOUS WEIGH mode when finished press and hold the HOLD button for approximately five 5 seconds until the display reads CONTINUOUS WEIGH STEP 1 Remove the Stretcher and position it under the patient Include any additional items used when zeroing the system Note The bulk of the patient s mass must be centered on the Stretcher for proper balanc
24. ssssssssscccccccsssssees 7 Figure 5 T Boom Lifter Pump Connection sssssacsssissssunasssecsseseceasstescasseunnsusvnsedecesesesveestascassswineis 7 Figure 6 Transducer Connected to T Boom ccccssssssssscccccccccssccccssssssssssssssssscccccccccssssees 7 Figure 7 Transducer able Connection sscisssssssccsserbendessaseseicadseicsssesssiasesbandantaseneicssseecsstiusebacssbones 7 Figure 8 Transducer A Frame Connected eee e e eee ee eee eee eee ee esee esee eeeessssssus 7 Figure 9 Velcro End of Stretcher Bar Channel on Stretcher e 8 Figure 10 A Frame Hook Placement on Stretcher ccccccccsssssssssssssssssssssssssssssscccccccssssseees 8 Figure 11 Stretcher Cup Receptacle for Transporting Scale 10 Figure 12 Lifter Legs Opened Closed sscccsccoosssccsssssssssessssssoossssscceseccccssssscessesessssoosssssssconeses 13 Fig re 13 LHEEEOCK RELEASE LEVOT aiscscticdicsveceseverveacevsserasvasstioriscceueirveoveasisencusnsestrnicntes 14 Figure 14 Battery Compartment OVER ssssssssseeeececcccoccososssesssccccceccocoosoosssssssssececececessssssssssssoe 15 igure I5 PC Bord ACCESS C OVOEG nein arnie an rieira eaei iaa ieS EEEN an 17 Figure 16 Location of Internal Calibration Buttons and Offset Potentiometer 17 Figure 17 Location of Internal Initialization Buttons
25. x under each icon to activate command ZERO The ZERO button is used to zero the system before placing a patient onto the scale O system When pressed the display message will indicate PLEASE WAIT WEIGHING HANDS OFF Ensure that nothing is in contact with the weighing surface during this procedure The display will read WEIGHT 0 0 LB or KG WEIGH The WEIGH button wakes up the display and shows the patient s weight if it should Auto Power Down before the weighing process is done ZERO IL HOLD The HOLD button freezes the displayed weight and temporarily stores it away in memory Press HOLD to store the weight into memory To recall last weight reading press HOLD LB KG MODE y Weight data may be viewed in either pounds or kilograms Pressing the LB KG MODE button allows the operator to toggle between the two readings Both pounds and kilograms are displayed in a resolution of 0 1 MODE BASIC SYSTEM OPERATION ZERO With the stretcher in place without the patient make sure scale is free and clear of any O obstructions and press the ZERO button The displayed message will indicate way PLEASE WAIT WEIGHING HANDS OFF Make sure that nothing is in contact with the scale while zeroing the system In a few seconds the display will read WEIGHT 0 0 LB or KG Note If a pillow or blanket is to be added for patient comfort place them on the scale bef
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