Model 915A Indicator User`s Manual
Contents
1. Refer servicing to qualified service personnel Weigh Tronix reserves the right to change specifications at any time 08 02 00 915AUSER P65 29748 0014 1 Printedin USA Table of Contents Tablet Contents a re E 3 Specifications keser 4 CODIIOISS M 2 enti Ai LL M AA 5 7 utem ee 7 e MN 7 Cable Connections and Power Requirements ssssssseeeeeennm menn 8 oto rerz irae cuo 9 Gross oct tai 9 r 9 View 10 Clear Current ttd S dec ter ur ele Pate 10 ete ied bos io Ree en eee oie 10 How to View the Animal Statistics E Er hp ns E pen PER areas 11 Printing Repons ee ausser mee treu ant tet as 11 To Clear All Statistics From Memory nennen nnne 12 Seting c TET 12 Viewing and Setting the Time 12 Viewing and Setting th Date 0044000040 nnne nnne 12 Checking Battery o dde petente 13 DiaQnostC Tests x EE2. 13 Troubleshooting fn 15 POW GOR ee cance eas ete E 15 Stalled Display Following Power On 4 00000 16 5 17 Inaccurate Weight Readings p ekle eme co ete pru 17 56 18 Measuring Supply Battery 000444024 18 Service sad 18 5 19 Miscellaneous Information rs otto 19 MountngltheModel919A cip bos batte to ME Rea ea Rege 19 RDS12 MT 20 Optional Radio Remote Transmitter XM710 and 20 Ser S MODs tos enden ta e ded ee sara ls du ute 21 Appendix A Customizing pde n see den cs 22 Layout T through E 22 22 To Delete All ASCII Characters 2 23 Enablinig aito a UR Sent bo elm ema Desk pre 2
3. 232 Connector Optional Power Fuse Power Connector Weigh Bar Connector 7 pin Alarm Connector Figure 2 Indicator with One Weigh Bar connector Remote Display RS 232 Connector Optional Power Fuse Power Connector Weigh Bar Connectors 4 or 5 pins ITEM M SN y ex T EN VN NY Alarm Connector Alarm Fuse Figure 3 Indicator with four Weigh Bar connectors Indicator Operation Gross Weighing Key names are in BOLD UPPER CASE letters Dispayed characters are Bold Italicized Annunciator labels are UPPER CASE ID Number Entry The ID number can be used as a group identification or you can set up the 915A for Auto Print and use ID to enter each animal s ID number See the section Printing Reports 1 Power up the indicator by pressing ON Indicator powers up in mode that was active priorto turning off Verify the scale is empty and zero the scale by pressing ZERO 015 displayed Zeroing can only occur if there is no motion on the scale Place weight on the scale Gross weight is displayed You may enter an 8 digit numerical ID number to be included in the printouts 1 From the gross weighing mode use the keypad and enter the ID number ID number is shown on the display 2 Press ID The ID annunciator is turned on ID number is displayed for 2 seconds then returns to the gross mode View Current ID If no ID is c
4. 3 Pages are numbered consecutively beginning with the cover page Indicator Enclosure Display Display Rate Accuracy Linearity Repeatability Power Requirements Environment Weigh bar Drive Capacity Calibration Divisions Zero Balance Range Analog Span Automatic Zero Tracking Motion Detection Window Motion Filtering Alarm Output Specifications Impact dust and water resistant structural polycarbonate enclosure stands up to inclement weather and high vibration mobile farm applications Standard Weigh Tronix mounting bracket Dimensions 8 75 high x 10 5 wide x 6 5 deep 8 digit seven segment LCD 1 0 inch high characters 10 annunciators and fiber optic back lighting annunciators GROSS TARE NET ID MEMORY MOTION TOTAL AUTO LB and KG One two or five times per second 0 196 of applied load or one division whichever is greater 01 96 of capacity 01 of capacity one division whichever is greater Typical 12 VDC 95 mA 1 14 watts 12VDC 180 mA 2 16 watts for 5 pin 4 weigh bars Range 10 DVC 89 mA 0 9 watts to 18 VDC 9 555 mA 10 watts Negative ground system 20 F to 140 F 29 C to 60 C to 95 non condensing humidity 350 ohm Weigh bars Front panel calibration and spanning for all types of weigh bars and load cell applications up to 999999 Ib or kg 01 02 05 1 2 5 1 2 5 10 50 100 200 500 Ib or kg 1 mV V via f
5. ONIX MODEL 915A FAIRMONT MINNESOTA U S A Figure 1 Model 915A indicator The front panel consists of the digital display window with annunciators numeric keypad and the following keys ON Use this key to power up the 915A indicator OFF Use this key to power down the 915A indicator MENU Use this key to access the menus and scroll right in the menu structure SELECT Use this key to make selections in the menus and to scroll down in the menu structure ID Use this key to access the ID function TARE Disabled RM Use this key to recall a weight stored in memory G N Use this key to escape back to gross weighing M Use this key to record add a displayed weight to the memory M Use this key to delete the last recorded weight in memory PRINT Use this key to output displayed information to a peripheral device ZERO CLEAR Use this key to zero the scale or clear a keyed in value from the display Cable Connections and Power Requirements Make sure all cables are connected as shown in Figures 2 amp 3 Voltage to the Model 915A must be 10 18 volts DC negative ground only If voltage is between 8 10 volts Lo bAtis displayed on the indicator Dropping below eight volts will cause the Model 915A to automatically shut itself off protecting the battery from being completely drained Consult the Model 915A Service Manualftor instructions on disabling the automatic shut off Alarm Fuse Remote Display RS
6. SELECT to see the total number of animals weighed 4 Press SELECT again to return to the StAts display 5 Press MENU to go to the next stat Repeat steps 3 5 to see all the stats 6 Press G N to return to gross weighing mode To print out a report press the PRINT key One ofthe following layouts will be printed depending on which you have chosen through the configuration menu See Appendix A for instructions on choosing a layout MODEL 9158 MODEL 9154 0019 12345678 914 1 Ib 12345678 maus L t 3 82 85 88 10 12 02 ayou 0001 684 lb 0002 788 10 y 0002 788 1b 8805 690 lb 8885 lb 0004 798 lb 8004 798 Ib 0005 315 lb 8005 915 1b 8006 624 Ib MODEL 9154 0006 624 Ib 0007 787 lb ID 12345678 0007 787 1 0008 679 lb 02703700 10 12 02 0008 679 Ib 8009 845 lb COUNT 8818 God Sia Ib Me AVERAGE Prt Ib H x COUNT 8818 Layout 2 HIGH 915 1b TOTAL 7716 lb LOW 624 lb e Dr LOU 624 lb Layout 4 Layout 1 1819 1b Layout 5 11 To Clear All Statistics From Memory Setting Auto LOC Viewing and Setting the Time Hefer to User s Menu section of this manual Viewing and Setting the Date Hefer to User s Menu section of this manual 12 Follow these steps to remove all the statistics from memory 1 From gross mode repeatedly press MENU until Cir StAt is displayed 2 Press SELECT YES or no is displayed 3 Use the MENU key to toggle between the choices Press SELECT whe
7. WEIGH TRONIIX his 2 EIS m e F gt t i E im f Li P c dam v Ti ua pec Model 915A Indicator User s Manual UNITED STATES This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instruction manual may cause harmful interference to radio communications Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to correct the interference at his own expense CANADA This digital apparatus does not exceed the Class A limits for radio noise emissions from digital apparatus set out in the Radio Interference Regulations of the Canadian Department of Communications Le present appareil numerique n emet pas de bruits radioelectriques depassant les limites applicables aux appareils numeriques de la Class A prescrites dans le Reglement sur le brouillage radioelectrique que edicte par le ministere des Communications du Canada CAUTION Risk of electrical shock Do not remove cover No user service able parts inside
8. cable making sure each time that all cables are connected except the one you removed for five pin connector orreplaced with an adapter plug forfour pin connector A defective Weigh Bar may be easily recognized with this method when a defective bar is replaced with an adapter plug for four pin connec tor or removed for five pin connector the indicator will zero properly First Visually inspect the scale system for apparent problems and improper installation 1 Check each cable from source to indicator for stress cuts breaks or abrasions Unplug and reconnect each connector at the indicator to verify that it is tight and making good contact Check between supporting structure and weighing structure for debris that might restrict Weigh Bar movement Make sure the supporting structure and weighing structure do not touch each other at any point except at the Weigh Bars 17 Alarm Light Function Measuring Supply Battery Voltage Service Repairs 18 Next Compare weight readings for all Weigh Bars Position a person or heavy object on the platform above each Weigh Bar one bar at a time and compare weight readings for the same person or same object For each weighing the weight itself will be off center favoring a single Weigh Bar therefore none of the readings will be accurate However your readings obtained by weighing the same person or object above each Weigh Bar should be nearly identical
9. data displayed on the Model 915A is also displayed on the RD912 Figure 4 Model 912 Remote Display An optional radio remote transmitter and receiver can be installed This option lets the user configure the XM710 to act as a ZERO PRINT M M RM or G N key and work at up to 100 feet away It can be installed in either the Model 915A or the RD912 WEIGH TRONIX XM710 L Figure 5 Radio Remote Lc Press the MENU key to scroll the menu Press the SELECT key to move the menu Press and hold MENU Gross gt Stats 9 CLr Stat Auto Loc 9 Hour Date Battery J Test soft Y Y Vt HH MM SS MM er YY Input voltage UR DD MM YY ON Units configured Press MENU for kgs use y DD MM YY Display gt Buttons Serial Relay NO gt YES Y Press MENU Y isplay A Press an Loop or Count p Total MRSS s d A Light key no ieee Off Flash On Figure 6 User s Menu Appendix Customizing Printouts Layouts 1 5 The hidde
10. del 915A must be 10 18 volts DC If voltage is between 8 10 volts Lo bAtis displayed on the indicator Dropping below eight volts will cause the Model 915A to automatically shut itself off protect ing the battery from being completely drained There are four tests available to assist troubleshooting in these areas display buttons serial relay 1 Fromgross net mode repeatedly press MENU until 2 Press SELECT 3 Press SELECT to perform a test of the display segments and annunciators or Press MENU twice to go to the next test tESt is displayed diSPIAY is displayed This is the display test The display alternately lights all the display segments and annunciators Press SELECT to end the test buttonS is displayed This is the buttons test 13 You can press SELECT at any time to return to the rELAY display 14 10 11 12 13 14 Press SELECT to perform a test of the front panel buttons Or Press MENU to go to the next test SEriAl is the serial test This will tell you if pins 2 and 3 are connected If they are connected loop is displayed when you press SELECT no loopis displayed when you press SELECT if pins 2 and 3 are not connected Press MENU to go to the next test Press SELECT Press MENU once to cause the light to flash on and off press MENU again to cause the light to stay press MENU again to shut off th
11. e light Press SELECT Press MENU Press MENU Press SELECT Repeatedly press MENU to scroll through the part number and revision level and return to the SoFtdisplay Press MENU one more time and you are back in the gross net mode When you press any key that key name will appear in the display Press MENU to stop the test Display will show SEriAl SEriAl is displayed rELAY is displayed Use this test to check alarm light function OFF is displayed FLASH is displayed on is displayed OFF is displayed rELAY is displayed tESt is displayed SoFt is displayed This lets you see the part number and revision level of the software First part of the software number is displayed Troubleshooting Power On Failure If you experience problems in the operation of your system read through these troubleshooting steps and perform those which are appropriate This information may help you to correct the following operational difficulties without calling your supplier or sending your equipment in for repair Power on Stalled Display Following Power on Indicator Lock up Inaccurate Weight Readings Alarm Light Malfunction Measuring the Supply Battery Voltage Instructions for sending an indicator in for repair are provided in the last section under Service Repairs If your indicator doesn t power on check the following possible problem sources in the order given Attemp
12. ge key in the new ASCII code number and press SELECT to return to the ASCII display Press the GIN key when you are done To Delete All ASCII Characters Enabling Auto Print Following is an example of how to enter Model 915A lt CR gt lt LF gt Enter the following control codes Sequence Control Code 10 01 02 Repeat step 8 until all control codes are entered and press SELECT Press G N key to exit programming mode and return to the gross net weighing mode Access Serial ASCII in the configuration menu Press the ZERO CLEAR key 77 79 68 69 76 32 57 49 53 65 13 10 Control Character Carriage Return Line Feed ASCII is displayed ASCII is displayed ASCII blinks and all the control codes are cleared With auto print enabled the indicator automatically transmits standard printout when motion ceases 1 2 10 Key in 915 Press hidden E key and hold for two seconds Press SELECT Press MENU repeatealy until SEriAl is displayed Press SELECT Press MENU until Auto is displayed Press SELECT Press MENU to display either OFF or on Press SELECT Press MENU to scroll to next desired option or G N to exit 91515 displayed 915 Ais displayed ConF is displayed bAUD is displayed Depending on your choice auto print is now either off or on 23 Table 1 ASCII Control Codes Control Character Contr
13. ift out fuse amp cap assembly 2 Remove old fuse from cap and insert new fuse 3 Replace fuse amp cap assembly in fuse connector 4 Test Indicator and Cables to isolate the source of the problem a Disconnect all cables on bottom panel of Indicator except for power cable Do disconnect Weigh Bar cables and if present alarm cable and printer remote display cable 15 b Now try powering on If this is not successful your problem is in the indicator and you should contact your supplier c If youare able to power on with only the power cable connected your problem is most likely not in the indicator continue troubleshooting d With power still on plug in cables one at a time Weigh Bar cables first then alarm cable then printer remote display cable until plugging in one of the cables causes the indicator to shut off That cable is the bad one and needs to be repaired or replaced Stalled Display This category of problems can exhibit any one of the following symptoms Following Power On An illegible display that cannot be zeroed and from which you cannot exit A legible display such as HELLO that cannot be zeroed and from which you cannot exit An illuminated backlight with no characters displayed and allowing no exit e f the red illumination on the display is visible telling you the indicator has power on a sunny day you may have to shade the display you can possibly restore the display functi
14. n E key is between the 9 and the M keys on the indicator ASCII The hidden E key is between the 9 and the M keys on the indicator 22 Below are the steps to choosing Layout 1 5 1 Key in 915 Press hidden E key and hold for two seconds Press SELECT Press MENU repeatedly until SEriAl is displayed Press SELECT Press MENU repeatedly until LAYoUtis displayed Press SELECT Press MENU until the layout you want is displayed then press SELECT Press MENU to scroll to next desired option or G N to exit 91515 displayed 915A is displayed ConF is displayed bAUd is displayed 1 5is displayed That layout is now active The ASCII parameter lets you customize the first line of Layouts 1 2 and 4 only You key in the ASCII code number for the character you want to print You can use up to 40 characters in the line The ASCII codes are shown in Table 1 1 2 Key in 915 Press hidden E key and hold for two seconds Press SELECT Press MENU repeatealy until SEriAl is displayed Press SELECT Press MENU repeatealy until ASCII is displayed Press SELECT Key in the control code from Table 6 and press MENU 91515 displayed 915A is displayed ConF is displayed bAUd is displayed 1 _ is displayed The 7 refers to the first of the 40 characters you can insert 2 is displayed To edit an existing sequence display the sequence number you want to chan
15. n attempting to M when a gross weight is negative or when motion is occurring Miscellaneous Information The Model 915A mounts on a quick detach bracket Weld or bolt the quick detach bracket into place as follows Mounting the Model 915A 1 Choose a mounting location that is convenient for operation ofthe indicator and protected from moving parts or from other moving machinery Hold the indicator at the proposed mounting location and verify that the display is legible and the controls accessible Positioning the quick detach bracket with the wider end at the top mark the desired mounting location If bolting use the quick detach bracket as atemplate and mark and drill holes Weld or bolt the quick detach bracket at the appropriate location If bolting use double nuts or self locking nuts to protect both indicator and machinery Insert the indicator bracket into the quick detach bracket and push it down into place For mobile applications wrap and twist a strong wire around the indicator bracket and the quick detach bracket to stabilize the mounting 19 RD 912 Remote Display Optional Radio Remote Transmitter XM710 L and Receiver 20 The RD912 is a remote display that is compatible with the Model 915A An RD912 output option is required on the Model 915A for interfacing The interface cable plugs directly into the bottom of the Model 915A see Figure 4 below When using the remote display any
16. n the choice you want is displayed Stats are cleared or not depending on your choice 4 Press the G N key to return to gross weighing mode Follow these steps to turn Auto LOC on or off 1 From gross mode repeatedly press MENU until Auto LOC is displayed 2 Press SELECT on or OFF is displayed 3 Press MENU to toggle between the choices Press SELECT when the choice you want is displayed X Auto LOC is displayed 4 Press the G N key to return to gross weighing mode 1 From gross mode repeatedly press MENU until Hour is displayed 2 Press SELECT The time will be displayed in hours minutes and seconds 3 Enter the correct time allowing spaces for hours minutes and seconds For example 1 59 would be entered as 15900 4 Press SELECT Hour is redisplayed 5 Press G N to return to gross weighing mode 1 From gross net mode repeatedly press MENU until Date is displayed 2 Press SELECT The date is displayed in month day year For kg day month year Checking Battery Voltage Hefer to User s Menu section of this manual Diagnostic Tests 3 Tochange the date key in the new numbers 4 Press SELECT 5 Press G N to return to gross weighing mode 1 Fromgross net mode repeatedly press MENU until 2 Press SELECT Dateis redisplayed battErY is displayed The input voltage of the battery or power source will be displayed Voltage to the Mo
17. ol Character Control Character Control Character 100 101 102 103 EC NEN Sa EI Taf Te 2 fo NUL SOH STX ETX EOT 104 105 106 107 108 109 110 111 112 118 114 115 116 117 118 119 120 121 122 123 124 125 126 127 L3 BET a Pe a ae NN 9 BEL Te DLE DC1 DC2 DC3 DC4 NAK SYN ETB CAN SUB ESC ae t i E E 98 65 32 24 This page left intentionally blank Weigh Bar is aregistered trademark of Weigh Tronix Inc Standard Scale amp Supply Company 25421 Glendale Avenue Redford MI 48239 313 255 6700 www Standardscale com WEIGH TRONIX Weighing Products amp Systems
18. on by doing a Reinitialization explained below To Reinitialize a Stalled Indicator 1 Press OFF 2 Press ZERO CLEAR and hold in while you 3 Press and release ON 4 Thenrelease ZERO CLEAR If the display says Hlinstead of HELLO following a reinitialization power on your indicator has a potential problem and should be checked Contact your supplier 16 Indicator Lock Up Inaccurate Weight Readings A locked up indicator is represented by an illuminated alarm light and a display of Error 1 2 Shut off the alarm by pressing any key Test the Weigh Bar cables to isolate the source of the lock up problem as follows a Disconnect all Weigh Bars b Try to zero the indicator by pressing GROSS and ZERO CLEAR If you are unable to zero the indicator with the Weigh Bars discon nected the problem is in the indicator and you should contact your supplier If you are able to zero your indicator with the Weigh Bars discon nected then the problem is probably in the cabling or the Weigh Bars and you should continue troubleshooting Reconnect all Weigh Bars You will see Error displayed again If your Weigh Barconnectors have the four pin configuration disconnect one Weigh Bar and connect an adapter plug in its place If your Weigh Bar connectors have the five pin configuration disconnect one Weigh Bar No adapter plug is necessary Try to zero the indicator Repeat Steps 4 and 5 with each Weigh Bar
19. r press the M key The display will show the count with the new locked on weight This can be done with or without the animal on the scale Follow these steps to view each animal s weight 1 From gross weighing mode press the RM Thelast recorded weight and channel number is displayed 2 Press the M or M key to scroll through the list of animals and their weights To scroll more rapidly through the list press and hold the M or M key 3 Press the G N key to return to gross weighing mode How to View the Animal Statistics Printing Reports If AUTO PRINT is enabled see your Appendix A and AUTO LOC is on Layout 3 shown at right is printed as soon as an animal s weight is stable If AUTO LOC is off when pressing M Layout 3 is automatically printed You can customize the first line in the examples at right Model 915A See Appendix A Also ID will only be printed if an ID is entered Once you have recorded a series of animal weights you can view the results by entering the StAts item in the user menu See Figure 6 Under STATS you can view the following by using the SELECT and MENU keys total count of animals weighed total weight of all animals weighed average weight of all animals weighed highestrecorded animal weight lowestrecorded animal weight 1 From gross mode press MENU and StAts is displayed 2 Press SELECT The first stat Count is displayed 3 Press
20. ront panel push button 0 20 mV V to 1 0 mV V full scale OFF 0 5 1 0 2 0 3 0 5 0 10 0 divisions OFF 0 5 1 0 2 0 3 0 5 0 10 0 divisions Normal intermediate and high Comes on standard in the Auto Accumulate Print mode when Auto Loc takes place RS232serialoutput Includes battery backed up time and date Baud rate selectable 9600 4800 2400 1200 600 and 300 xon xoff 8 data bits one stop bit no parity Initiate serial transmission through print button enquire characters and auto print after accumulate and after motion ceases Five format selectable printouts along with single line programmable 40 ASCII characters Remote Display Output used with the RD912 remote display Remote XM710 Includes optional remote radio receiver and transmitter Two separate inputs on the M915A will each be programmable to function as Zero G N RM M M or Print Frequency 303 MHz Frequency on by key switch causes activation of Input 1 or Input 2 This page left intentionally blank Introduction Front Panel Keys The Model 915A is a general purpose animal weight indicator designed to operate at 12VDC It has a companion remote display called the RD912 The indicator can record 1000 animal weighments and give statistics on count total weight average weight highest weight and lowest weight Figure 1 shows the Model 9154 front panel MEMORY MOTION WEIGH TR
21. t to power on after trying each of these four troubleshooting steps 1 CheckBattery Voltage Required voltage is 10 18 volts DC negative ground If the voltage is between 8 10 volts the indicator will display Lo bAt The indicator will automatically turn off if the incoming voltage drops below 8 volts or rises above 18 volts 2 Disconnect and Check Power Cable Connector at the vehicle or AC to DC converter clean if necessary and reconnect 3 Replace Fuses Sometimes a bad fuse can be recognized by an obvious break in the wire filament However such a break is not always observ able and getting a successful power on after changing a fuse is often the only way of knowing that the fuse was indeed defective Make sure new fuses are the proper size and have a current rating of five amperes Using a fuse with too high a current rating can cause costly damage to the indicator and will void your warranty The same is true for substituting wire a nail or any other object in place of a fuse Place nothing in the fuse connector except a proper fuse Change one fuse at a time see instructions below Try to power on after changing the first fuse if unsuccessful change the second fuse and try to power on again If changing the second fuse fails to allow successful power on proceed to the next trouble shooting step To replace a fuse first locate fuse caps on the bottom panel of the indicator Then 1 Turn cap counterclockwise and l
22. to each other A single Weigh Bar reading that is significantly different from the others is probably defective If your external alarm works properly but the alarm light fails to illuminate when it should a problem exists with the alarm light Please send in the indicator for repair To check input voltage to indicator battery voltage 1 Press MENU tArE is displayed 2 Press MENU repeatedly until battErY is displayed 3 Press SELECT Incoming battery voltage is dis played 4 Press SELECT battErY is displayed 5 Press GIN to return to weighing mode If you find the indicator or one or more of the Weigh Bars to be defective contact your supplier or send your equipment back to the factory for repair postage prepaid Include the following information 1 Your name and address 2 Supplier name and address 3 Date of purchase 4 IMPORTANT An informal note describing symptoms of the problem Display Messages HELLO Indicator is being reinitialized Message is displayed briefly at time of power on Indicator is in state of over capacity Indicator is in state of under capacity System is not functioning properly Weight is not being calculated because scale weight is too high or too low Refer to information on Indicator Lockup in Troubleshooting section of manual Indicator is transmitting data Appears after pressing the PRINT key when printing all memory channels Displayed whe
23. urrently pro grammed then ID key displays no Id for 2 sec and returns to the Gross mode Clear Current ID Animal Weighing Layout 3 shown in Printing Reports will be printed if you press M with Auto Print enabled It will also be printed if Auto Loc is enabled How to View Individual Animal Weights 10 Current ID is shown for two seconds and then returns to the gross mode 1 Press ID 1 Press ID to display current ID Current ID is displayed 2 Press ZERO CLEAR while ID is displayed ID is cleared and returns to gross mode You can perform animal weighing with Auto LOC on or off See the section Configuring Auto Loc With Auto LOC on As the animal walks on the scale and the weight stabilizes the alarm light comes on for two seconds and the weight is automatically stored in the first available record 1 1000 The display will show the record number and the locked weight until the weight drops by 2096 or more At this point the display returns to live gross weighing and the alarm light turns off In this mode the M M keys are disabled With Auto LOC off After the animal walks on the scale you must press the M key to record the weight The memory channel and weight will remain displayed and the alarm light will come on for two seconds You cannot record the weight again until the weight drops by 20 If you try the display will show Can t If you want to erase a weight you recorded in erro
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