MSI 3460 Challenger 3 Manual
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USER F8) To enter a calibrationweight other than capacity, press USER. T h e display far left digit will flash zero indicating that a number should be entered. blinking Error Correction: If you input a wrong value, press ZERO to step back one digit and reenter. USER FUSER F TARE USER F TARE TAREUSER F TAREUSER F 5 times USER F TARE fixed blinking blinking blinking blinking blinkingblinking fixed fixed fixed3DVVTARE 9) Press the USER key to scroll the number and the TARE key to enter each digit of the calibration weight. In this example, we’ll enter 2500 kg on a 5000 kg capacity scale. Do not push the TARE key two times in a row until the entire number is showing. To add a decimal point, push the POWER key while the number is blinking. 10) When the entire value of the test weight is displayed and the weight and scale are stable, press TARE to finish off the weight entry. If the resultant cal value is within limits, the display will read PASS briefly. 11) The display now reads Load2. The 3460 allows multipoint calibration. If more cal points are desired (up to 3 additional) press TARE. If a single point cal is all that’s needed, pressZERO and jump to step 15. 12) Load the scale with the next test weight. The display offers the reading that will occur without adjusting the value. If the weight value shown is acceptable push TARE and skip to step 14. If the calibrated value needs adjusting, go to step 13. Test weights can be any in-capacity weight, the order is not important. The 3460 supports 5-Point Cal, Zero and up to 4 span points. 13) Press the USER key to scroll the number and the TARE key to enter each digit of the calibration weight value. When the entire calibration weight is displayed, push TARE a second time to finalize the calibration span point. If the resultant cal value is within limits, the display will read “PASS” briefly. Example Value only. /RDGTARE To set Next Span Point To skip additional Span Points USER F ZERO To scroll the digit TARE To Enter the digit into the cal weight value TARE To complete the cal weigh value entry3DVV You can cancel calibration by pressing Power and the scale will reset to the previous calibration constants. Calibration 27 Figure 5-2. Standard Calibration Procedure, Continued.
14) The display now readsLoAd3 or LoAd4. Repeat steps 12 and 13 for additional span points press TARE or press ZERO if you are finished. After LoAD4 has passed, the 3460 will automatically advance to the next step. /RDG /RDG or TARE To enter another span point 15) The display shows CAL’d to indicate that the calibration was successful. 16) Press TARE. The display flashes C-CAL followed by the C-CAL number. Make a note of this number. If the X1000 annunciator is lit, also make a note of that. This number is used to calibrate when test weights are unavailable. C-CAL does not replicate multipoint calibrations. 17) Press ZEROto store the calibration constants, or after eight seconds, the calibration constants will automatically stored. After the store message is displayed, the scale goes to the next item on the cal menu, SEtuP. 18) Press ZERO to exit the Cal menus and start up the standard weight display. The 3460 is ready for use. 19) After ensuring the calibration is acceptable, replace the hex seal screw. If the scale is being used as a Legal- for-Trade device, place a lead-wire seal through the cal screw over to the adjacent screw. &&D/ Example Value only. VWRUH ZERO ZERO &$/G 6HWYS TAREFlashing ZERO LO BATT CAL X1000 MSI-3460Model No. To skip the C-CAL step 28 MSI-3460 Operator’s Manual Figure 5-3. Standard Calibration Procedure, Continued.
Calibration 29 5.1 Initial Calibration Use this procedure only if the capacity and count by (d) needs to be modified. The initial steps of the initial calibration will totally erase user setups as well as any previous calibration. 1) Turn the 3460 off. 2) Remove the seal screw. With a small screwdriver press and hold the CAL switch behind the seal screw. 3) Still holding down the CAL switch, press the POWER switch. 4) The display blinks rESEt. 5) To reset all calibration constants and setup parameters, press TARE. 6) The 3460 requests a confirmation by displaying Sure? . To cancel the Reset press the POWER key. 7) To complete the reset, press TARE . The Calibrate menu appears. You must now recalibrate the system. 8) Press TARE to start the initial calibration procedure. The display shows Unit. You select the units you wish to calibrate in. 9) Press TARE to select the calibration unit. 10) Select the USER key to choose between lb and kg. When the desired unit is shown, press TARE. 11) Next, set the capacity in the selected units. Capacity must be set no higher than the load cell rated capacity. 12) Press TARE to enter the capacity setting screen. A capacity of 10000 is the initial value. If 10000 units is the desired capacity press TARE and skip to step 16. 13) To change the capacity, press USER . Initial CalibrationResetting Capacity and Countby (d) Cal Switch LO BA CAL Remove Hex Seal ScrewPress Switch behind the hole with a small ScrewdriverCAL UHVHWblinking 6YUH &$/ 8QLW 8QLWblinking kg lbUSER F &$3 TARE TARE TARE TARE TARE TARE blinking USER Fblinking Error Correction: If you input a wrong value, press ZERO to step back one digit and reenter. To enter a decimal point, push POWER while the digit is blinking. Figure 5-4. Initial Calibration
30 MSI-3460 Operator’s Manual Figure 5-5. 14) The first digit blinks. Use the USER key to scroll through the numbers. When the desired number is shown, push TARE. In this example, we’ll enter 2500 as a capacity. USER FUSER F TAREUSER Ffixed blinking blinking blinking TARE TAREUSER F TAREUSER F 5 times USER F TAREblinking blinking blinkingfixed fixed fixed Continue inputing the desired capacity using the USER key for scrolling the number and the TARE key to store the number. 15) Finalize the capacity value by pressing the TA R E key on an unblinking display. In our example, once the number 2500 is fixed on the display, pressTARE to store the capacity value. 16) Next the scale division size ‘d’ is set. Press TARE to begin. In this example we’ll set the ‘d’ to 2 units. 17) Select the USER key to scroll through the recommended scale divisions. The first ‘d’ offered is the standard division for the given capacity. Setting a ‘d’ size that results in total resolution higher than 1:5000 is not recommended for stability reasons. 18) When the desired scale ‘d’ is displayed, press TA R E.The UnLd display appears and the scale is ready for calibration. Follow the standard calibration procedure starting at step 3. TAREG TARE blinkingUSER FblinkingUSER F XQ/G TARE Capacity is set. ‘d’ is set. Proceed to Standard Calibration starting at Step 3. Initial Calibration, Continued 5.2 Guidelines for Capacity and Resolution Crane scales are subject to forces that regular floor scales do not see. Many bridge cranes, hoist cranes, and mobile cranes la ck rigidity and tend to bounce or swing when loads are lifted. For this reason, MSI recommends that resolution is kept in the 1:2000 to 1:3000 range. Some improvement in stability can be achieved by increasing the filtering. However, you should never program resolution that is far greater than you need. If the MSI-3460 display is never stable, it is recommended that the resolution is reduced and/ or filtering increased.
Calibration 31 Due to LFT requirements and general scale de sign criteria, the weight must be stable for certain features to work: ZERO – weight must be stable to be zeroed. TARE – weight must be stable to be tared. TOTAL – weight must be stable to be added to the total registers. One way to improve the stability is to increase the filtering, at the risk of increasing settling time. The other is to increase the ‘d’ (reduce resolution). The third way is to increase the motion window. The MSI-3460 defaults to ±1d as a motion window. It can be changed at MSI to a higher value if desired. Often ±3d is chosen for bridge cranes as these tend to ha ve a lot of bounce to them. This of course carries an accuracy penalty adding ±3 d to the total accuracy of the scale if the zero or tare operation happens to capture the weight in a valley or peak. Setting capacity is dictated primarily by th e capability of the load cell. MSI supplies the MSI-3460 in many capacities. Never set the capacity of the scale higher than the rating of the load cell. Due to excellent linearity of the MSI S-beam load cell, it is acceptable to set lower capacities to better match the crane the MSI-3460 is used on. For example, if the hoist is rated for 9000 lb. you can use an MSI 10000 lb. MSI 3460 and reset the capacity to 9000 lb. so that the scale will indicate overload at 9000 lb. instead of 10000 lb. Derating as much as 50% of the capacity is usually acceptable, but the scale may be less stable if the ‘d’ is decreased. The capacity of all MSI-3460 systems is rated approximately 20% higher than the rated capacity in pounds. This is to allow the kg capacity to be exactly 1/2 the number of the pounds capacity. 5.3 C-Cal Calibration When adequate test weight s are not available, the MSI-3460 can be calibrated using a programmed constant calibration which is referr ed to as C-Cal. To use C-Cal, a C-Cal number must be known from a previous calibration. MSI supplies replacement load cells for the MSI-3460 with the C-Cal value stamped on the serial number label. When a calibration is performed with test weights, a new C-Cal is generated. C-Cal can be used when the electronics are repl aced to get an approximate calibration that may be suitable for non Legal-for-Trade applications. ImportantThe C-Cal number must be known prior to starting this procedure. For a MSI-3460 with its original load cell, MSI prints this number on the calibration r ecord, the serial number tag, and on the calibration log found inside the battery compartment. C-Calibration reduces slightly the absolute accuracy of th e system if the electronics are replaced or a new load cell is installed, and is intended for non-critical use only. Legal-for-Trade installations require that the MSI-3460 is calibrated using test weights. If a system was originally multi-point calibrated, the C-CAL calibration will erase the additional span points, as C-Cal is only a two point calibration (Zero and Span at 10% of capacity).
TARE XQ/G &&$/ TARE USER F 1)Remove the seal screw. With a small screwdriver press the cal switch behind the seal screw. The CAL setup menu appears. 2)Press the USER key to scroll to the C-Cal menu selection. 3)Press TARE to start the C- Cal procedure. If this calibration is using a cleared 3460, the INITIAL CALIBRATION procedure will start here. You must set the cal unit, capacity, and count- before proceding to step 4, 4)The display reads UnLd (unload) indicating you should remove all weight from the hook. 5)Press TARE. The 3460 sets the zero calibration point. 6)If the zero is in range, the scale will display PASS. 7)Next the display reads CCAL? to ask that you look up the C-Cal value to be used. 8)Press TARE. The 3460 is ready for numeric entry of the C-CAL value. 9)To enter an C-Cal value press USER. The display far left digit will flash zero indicating that a number should be entered. &$/ C-Cal Calibration Procedure blinking 3$66 No weight on hook Flashes Zero Input C-Cal value blinking Cal Switch LO BA CAL Remove Hex Seal ScrewPress Switch behind the hole with a small Screwdriver &&D/ USER F TAREblinking CAL 32 MSI-3460 Operator’s Manual Figure 5-6. C-Cal Calibration Procedure
TARE TARE TARE USER F 10) Press the USER key to scroll the number and the TARE key to enter each digit of the C-Cal value. In this example, we’ll enter the C- Cal value of 2503. However, it should be noted that most C-CAL values are 5 digits. Do not push the TARE key two times in a row until the entire number is entered. C-Cal’s lessthan 4 digits will not be accepted. If the number is too small the display will read “LittL” and goback to the “C-CAL” message. Error Correction during number entry: If you input a wrong value, press ZERO to step back one digit and reenter. For the rare C-CAL number that includes a decimal point and the X1000 annunciator, press the POWER key to enter the decimal point followed by an additional press of the POWER key to inputthe X1000 factor. 11) Once the entire number is entered (not blinking) press the TARE key to complete the entry of the C-Cal value. 12) If the Calibration was successful, the display will read PASS followed by CAL’D. 13) C-Cal is complete. Press ZERO . The next cal setup menu item appears. 14) Press ZERO to store the calibration and return to scale operation. USER FUSER F TARE USER F USER F 5 times USER F TARE fixed blinking blinking blinking blinking blinkingblinking USER F USER Fblinking 3$66TARE ZEROStore and return toweight display 6WRUH fixed blinking blinking fixed fixed fixed USER Fblinking 6HWYS &$/· ZEROnext Menu item Calibration 33 Figure 5-7. C-Cal Calibration Procedure, Continued.
34 MSI-3460 Operator’s Manual 5.4 Calibration Setup Menu The calibration setup menu contains two items: standard and auto zero maintenance “Auto0.” In addition, more menus will appear that are transferred from the main setup menu when Legal for Trade settings are used. &$/ &&D/ 6HWYS 6WDQG $YWR LQGYV +E U XQLW 2Q 2IICal Standard Auto Zero Maintenance Calibrate with Weights Calibrate with Constant Industrial Setting (default) Handbook 44, NTEP R-76, OIML Industrial, restricted to 1 Weight Unit AZM On AZM Off USERF Cal Switch LO BA CAL Remove Hex Seal ScrewPress Switch behind the hole with a small ScrewdriverCAL Figure 5-8. Calibration Setup 5.5 Standard There are four selections in the standard menu. 1. Industrial (Indu5) - This is the most common setting for the MS I-3460. With the industrial standard, you have full range zero, access to units switching, filters, and peak hold. 2. Handbook 44 (Hb-44) - Sets the scale to enabl e only approved features per the NTEP HB-44 rules and regulations. Access is denied to peak hold, and the zero range may be limited. The filter menu is moved to the cal setup menu, so filters are only accessible through the cal seal. 3. R-76 (r-76) - Sets the scale to enable o nly approved features per OIML R-76. Only kg weight units are available. The zero range is limited to 5% (-2+3% relative to calibrate zero). Net/Gross function is temporary. Once net weight is established, pushing an F key set for Net/Gross will cause a maximum five second display of the gross weight. You must clear the tare to display gross weight constantly. Other metrologica l aspects are changed to meet R-76 requirements. 4. One Unit (1unit)-The one unit standard is exactly the same as industrial, except uni ts switching is inhibited. This is useful for metric only countries. Another use of the one unit standard is to allow the scale to be calibrated in units other than lb or kg, since convers ions are eliminated. Contact MSI for more information on the standards settings.
TARE If you are already in the Cal menu skip to step 2 1) Remove the seal screw. With a small screwdriver press the cal switch behind the seal screw. The CAL setup menu appears. 2) Press the USER key to scroll to Setup. 3) Press TARE to enter the cal setup menu. 4) Press TARE to enter the standard menu. The current standard setting is displayed. 5) Scroll to the desired standard pressing the USER key. 6) Press TARE to set the standard. The display goes to the next item in the CAL setup menu. 7) Either press ZERO twice to exit setup and store all changes, or continue to another setup menu item using the USER key. &$/ Weight Standard Setup Cal Switch LO BA CAL Remove Hex Seal ScrewPress Switch behind the hole with a small Screwdriver VHWYS 6WDQG LQGXVTARE XQLW $YWRTARENext Cal Setup Menu Item ZERO Store and return to weight display &D/ ZERO 6WRUH Calibrate Menu CAL USER F USER F Calibration 35 Figure 5-9. Weight Standard Setup 5.6 Auto Zero Maintenance The MSI-3460 employs an autozeroing maintenanc e mechanism to adjust the zero reading to the center-of-zero (COZ). COZ is defined as the weight reading is within 1/ 4 ‘d’ of zero. AZM continuously adjusts zer o to maintain COZ. It is recommended that AZM is on to maintain the highest acc uracy. However, there are circumstances when it should be turned off. This can happen when minor variations of weight occur while picking up scale attach ments and the variations fall within the AZM capture window. The AZM capture window (usually 1 ‘d’) and capture time (usually 8 seconds) can be adjusted by MSI to meet custom requirements. The settings of AZM are dictated in Legal for Trade standards and cannot be adjusted.
TARE If you are already in the Cal menu skip to step 2 1) Remove the seal screw. With a small screwdriver press the cal switch behind the seal screw. The CAL setup menu appears. 2) Press the USER key to scroll to Setup. 3) Press TARE to enter the cal setup menu. 4) Press USER to scroll to the Auto0 menu. 5) Press TARE to enter the auto- zero menu. The current setting is displayed (blinking) 6) Change the setting between On or OFF pressing the USER key. 7) Press TARE to set the autozero. The display goes to the next item in the CAL setup menu. 8) Either press ZERO twice to exit setup and store all changes, or continue to another setup menu item using the USER Key. &$/ Auto Zero Maintenance Setup Cal Switch LO BA CAL Remove Hex Seal ScrewPress Switch behind the hole with a small Screwdriver VHWYS 6WDQG $YWR 2II 6WDQG TARENext Cal Setup Menu Item ZERO Store and return to weight display &D/ ZERO 6WRUH Calibrate Menu USER F USER F TAREBlinking 2QBlinking CAL USER F 36 MSI-3460 Operator’s Manual Figure 5-10. Auto Zero Maintenance