MSI 7300 Dynalink 2 Manual
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Calibration 27 Procedure for the Routine Calibration of the MSI-7300 XQ/G /R$ lb Blinks Capacity 1) With the power on, initiate calibration by holding down theF2 and ZERO keys until the display reads CAL. The CAL setup menu appears. 2) Press F1 to start the calibration procedure. 3) The display reads UnLd (unload) indicating you should remove all weight from the link. You can choose to leave bottom fittings on the link as long as they are always part of the load train. 4) Press F1. The 7300 sets the zero calibration point. 5) If the zero is in range, the scale will display PASS. Then LoAd1 is displayed. 6) Load the link with a precision test weight. For highest accuracy, a test weight of 10% of capacity or more is recommended. 7) Press F1. The 7300 flashes the capacity and calibration units. If you are loading the scale with the capacity weight, skip to step 10. 8) To enter a calibration weight other than capacity, press F2. T h e displays far left digit will flash zero indicating that a number should be entered. &$/ blinking 3$66 No weight on link Flashes Zero Lift Test Weight example capacity Error Correction: If you input a wrong value, press ZERO to step back one digit and reenter. ENTER/SELECT F1 ENTER/SELECT F1 ENTER/SELECT F1 SCROLL F2 Press Simultaneously F20 ZERO F1 Figure 5-2 Standard Calibration Procedure
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5 times fixedblinking blinking blinking blinking blinkingblinking fixed fixed fixed 3DVV 9) Press the F2 key to scroll the number and the F1 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 F1 key two times in a row. 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 link are stable, press F1 to finish off the weight entry. If the resultant cal value is within limits, the display will read PASS. 11) The display now reads LoAd2. The Dyna-Link allows multi-point calibration. If more cal points are desired (up to three additional) press F2 and repeat steps 8-10. If finished with span points, go to step 12. 12) Press ZERO to store the calibration constants. The LCD will read CAL’d to indicate the calibration is acceptable. 13) Skip to step 14, or press F1 to observe the CAL number. The C-CAL number appears. Make a note of the value. 14) Press ZERO to exit calibration. The next menu item Setup appears. 15) Press ZERO to store the calibration and return to standard link operation, or press F1 if you want to adjust additional cal setup parameters (Standard, AZM, etc.) You can cancel calibration by pressing Power and the scale will reset to the previous calibration constants. To add span pointsGo to step 8 To completecalibration 63DQ63DQ/RDG 6HW8SNext Cal menu item SCROLL F2 SCROLL F2 SCROLL F2 SCROLL F2 SCROLL F2 SCROLL F2 F2 SCROLL ENTER/SELECT F1 ENTER/SELECT F1 ENTER/SELECT F1 ENTER/SELECT F1 0 EXIT/SAVE ZERO 0 EXIT/SAVEZERO ENTER/SELECT F1 Optional: to display Cal number &&D/ ENTER/SELECT F1 blinking Example Cal# VWRUH 0 EXIT/SAVE ZERO &$/ Cal saved to memory F1 28 MSI-7300 Operator’s Manual Figure 5-2 Standard Calibration Procedure (continued)
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Calibration 29 5.2 Initial Calibration Use this procedure only if the capacity and count-by (d) needs to be modified. The initial steps of this procedure will totally erase user setups as well as any previous calibration. 1) Turn the 7300 on. 2) Press the ZERO switch and the F1 switch simultaneously. 3) The display blinks rESEt. 4) To reset all calibration constants and setup parameters, press F1. 5) The 7300 requests a confirmation by displaying Sure?. To cancel the Reset press the POWER or the ZERO key. 6) To complete the reset, press F1. The Calibrate menu appears. You must now recalibrate the system. 7) Press F1 to start the initial calibration procedure. The display shows Unit. You select the force units you wish to calibrate in. 8) Press F1 to select the calibration unit. 9) Use the F2 key to scroll through the available calibration units. 10) When the desired unit is shown, press F1. 11) Next, set the capacity in the selected units. Capacity must be set no higher than the load cell rated capacity. 12) Press F1 to enter the capacity setting screen. A capacity of 10000 is the initial value. If 10000 is the desired capacity in the selected Calibration Unit, press F1 and skip to step 16. 13) To change the capacity, press F2. Resetting Capacity and Countby (d) UHVHWblinking 6YUH &$/ 8QLW 8QLWblinking &$3 blinking blinking 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. For very large capacity Dyna-Links Enter the capacity in weight X1000 and push the POWER key twice (X1000 mode is indicated by the M annunciator during data entry). e.g. For a 100,000 lb 7300, enter 100, then press the POWER key twice so the M indicator is on. ENTER/SELECT F1 ENTER/SELECT F1 EXIT/CANCEL POWERTo cancelReset F1 ENTER/SELECT F1 ENTER/SELECT F1 SCROLL F2 ENTER/SELECT F1 ENTER/SELECT F1 SCROLL F2 kglbMkNTo n Press &Hold 0 ZERO F2F1 kg lbMkNTo nkglbMkNTo nkglbMkNTo n kglbMkNTo nkglbMkNTo n pounds Tons (US Short) Metric Tons (kg X 1000) kiloNewtons kilograms kg lbMkNTo nkglbMkNTo nkglbMkNTo n kglbMkNTo nkglbMkNTo n Figure 5-3 Initial Calibration
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The first digit blinks. Use theF2 key to scroll through the numbers. When the desired number is shown, push F1 . In this example, we’ll enter 2500 as a capacity. Continue inputing the desired capacity using the F2 key for scrolling the number and the F1 key to store the number. fixedblinking blinking blinking SCROLL F2 SCROLL F2 SCROLL F2 ENTER/SELECT F1 5 timesblinking blinkingblinking fixed fixed fixed 15) Finalize the capacity valueby pressing the F1 key on anunblinking display. In our example, once the number 2500 is fixed on the display, pressF1 to store the capacityvalue. 16) Next the scale division size d is set. Press F1 to begin. In this example we’ll set the d to 2. 17) Use the F2 key to scrollthrough the recommendedscale 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 F1. The UnLd display appears and the scale is ready for calibration. Follow the standard calibration procedure starting at step 3. G blinking XQ/G Capacity is set. d is set. Proceed to Standard Calibration starting at Step 3. F2 SCROLL ENTER/SELECT F1 ENTER/SELECT F1 ENTER/SELECT F1 ENTER/SELECT F1 SCROLL F2 SCROLL F2 ENTER/SELECT F1 Next Cal Screen blinking SCROLL F2 ENTER/SELECT F1 14) 30 MSI-7300 Operator’s Manual Figure 5-3 Initial Calibration (continued)
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Calibration 31 5.3 Guidelines for Capacity and Resolution Dyna-Links are subject to forces that static scales do not experience. 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-7300 Dyna-Link 2 display is never stable, it is recommended that the resolution is reduced as well as filtering increased. In any circumstance, the resolution should never be set higher than 1:15000 due to temperature and noise considerations common to all strain gage based load cells. The tension must be stable fo r certain features to work: ZERO tension mu st be stable to be zeroed. TARE tension must be stable to be tared. TOTAL tension 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 ti me. The other is to increase the ‘d’ (reduce resolution). The third way is to increase the motion window. The MSI-7300 Dyna- Link 2 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 cr anes as these tend to have a lot of bounce to them. This of course carr ies an accuracy penalty adding ±3 d to the total accuracy of the Dyna-Link if the zero or tare oper ation happens to capture the tension in a valley or peak. Setting capacity is dictated primarily by th e cap ability of the load cell. MSI supplies the MSI-7300 Dyna-Link 2 in many capacities. Never set the capacity of the Dyna- Link higher than the rati ng of the load cell. Due to the excellent linearity of the MSI Link load cell, it is acceptable to set lower capacities to better match the crane the MSI-7300 Dyna-Link 2 is used on. For example, if the hoist is rated for 9000lb, you can use a 10000 lb capacity Dyna-Link and reset the capacity to 9000 lb so that the Dyna-Link will indicate overload at 9000 lb instead of 100000 lb. Derating as much as 50% of the capacity is usually acceptable, but the Dyna-Link may be less stable if the ‘d’ is decr eased (resolution increased). NoteThe capacity of all the MSI-7300 systems is rated approximately 20% higher than the rated capacity in pounds. Th is is to allow the kg capacity to be exactly 1/2 the number of the pounds capacity.
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32 MSI-7300 Operator’s Manual 5.4 C-Cal Calibration When adequate test weights are not available, the MSI-7300 Dyna-Link 2 can be calibrated using a cal number calibration which is referred to as C-Cal. To use C-Cal, a factory generated C-Cal number must be known. MSI supplies replacement load cells for the MSI-7300 Dyna-Link 2 with the C-Cal value stamped on the serial number label. When a calibration is prefor med with test weights, a new C-Cal is generated. ImportantThe C-Cal number must be known prior to starting this procedure. For a MSI-7300 with its original load cell, MSI prints this number on the Calibrati on Record, the serial number tag. C- Calibration reduces slightly the absolute accuracy of the system and is intended for non-critical use only. For highest accuracy, calibrate the MSI-7300 with precision test weights. XQ/G 1) With the power on, initiate calibration by holding down theF2 and ZERO keys until the display reads CAL. The CAL setup menu appears. 2) Press F2to scroll to the C–Cal selection. 3) Press F1 to start the C-Cal calibration procedure. 3) The display reads UnLd (unload) indicating you should remove all weight from the link. You can choose to leave bottom fittings on the Link as long as they are always part of the load train. 4) Press F1. The 7300 sets the zero calibration point. 5) If the zero is in range, the scale will display PASS. Then C-CAL is displayed. 6) Press F1. The last known C–Cal value is displayed. If the offered C-Cal value is correct, push F1 and jump to step 10. In this example we’ll enter 15200 as an C-Cal value. You must use your known C-Cal value, not 15200. &$/ 3$66 No weight on link Flashes Zero ENTER/SELECT F1 ENTER/SELECT F1 SCROLL F2&&$/ &&D/ lb example C-Cal Value ENTER/SELECT F1 Press Simultaneously F20 ZERO F1 Figure 5-4 C-Cal Calibration Procedure
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7) To input the C-Cal value,press F2 to start the number entry process. 8) Use F2 to change the number, and F1 to enter the number. Add the next digit by pushing F2 and scrolling as required. Repeat this sequence until the entire C-Cal number is entered. 5 times fixed blinking blinking blinking blinking SCROLL F2 SCROLL F2 SCROLL F2 F2 SCROLL ENTER/SELECT F1 Error Correction: If you input a wrong value, press ZERO to step back one digit and reenter. To input a decimal point, push POWER while a digit is blinking. F1 9) Once the entire C-Cal value is entered, press F1 to finalize the number. The 7300 modifies its span factor registers to adjust the calibration to the value of the C-Cal. If the C-Cal input was in the acceptable range, the LCD will read PASS . Multiple C-Cal span points are possible, but are only accessible using MSI’s optional SCCMP program. 10) When the final C-Cal number is finished, press ZERO to exit and save the new C-Cal calibration. The LCD reads STORE to indicate a successful calibration. 11) Press ZERO again to exit the CAL menu and start standard link tension operation. blinking blinkingfixed fixed fixed 3DVV SCROLL F2 SCROLL F2 ENTER/SELECT F1 ENTER/SELECT F1 ENTER/SELECT F1 ENTER/SELECT F1 blinking SCROLL F2 SCROLL F2blinking 0 EXIT/SAVEZERO 0 EXIT/SAVEZERO 6WRUH SCROLL F2blinking &$/ 6HWYS Calibration 33 Figure 5-4 C-Cal Calibration Procedure (continued)
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34 MSI-7300 Operator’s Manual 5.5 Auto Zero Maintenance (AZM) The Dyna-Link 2 employs an auto zeroing maintena nce mechanism to adjust the zero reading to the center-of-zero (COZ). COZ is defined as the tension reading is within ¼’d’ of zero. AZM continuously adjusts zer o to maintain COZ. It is recommended that AZM is on to maintain the highest acc uracy. However, there are circumstances when it should be turned off. This can happen when minor variations of tension occur while picking up Dyna-Link attachments and the variations fall within the AZM capture window. The AZM capture window (usually 1 ‘d’) and captu re time (usually eight seconds) can be adjusted by MSI to meet custom requirements. 1) With the power on, initiate calibration by holding down the F2 and ZERO keys untilthe display reads CAL. The CAL setup menu appears. 2) Press F2 to go the the SetUP screen. 3) Press F1. The StAnd menu appears. 4) Press F2 to scroll to the Auto0 screen. 5) Press F1. The AutoZero mode shows On or OFF. In this example, we will turn off AZM (not recommended for typical operations) 6) Press F2 to change to AZM between on and off. 7) When the desired mode is displayed, press F1. 8) The next cal setup menu item appears. 9) Press ZERO twice to exit cal setup and store all changes, or continue to another cal setup menu item using the F2 Key. &$/ ENTER/SELECT F1 F2 SCROLL 6HW8S SCROLL F2 ENTER/SELECT F1 0 EXIT/SAVE ZERO 6WDQG 2IIblinking Press Simultaneously F20 ZERO F1 ENTER/SELECT F12Qblinking F2 SCROLL $XWR 6WDQG Next Cal Setup Menu Item 0 EXIT/SAVE ZERO &$/ Next Cal Menu Item 6WRUH Changes saved toBackup Memory Figure 5-5 Auto Zero Maintenance Setup
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Calibration 35 5.6 Service Counters The MSI-7300 maintains two service counters for safety. • The first counter counts the number of times the scale has been overloaded. • The second counter counts lifts above 25% of capacity. These counters serve to warn the user to insp ect the load train after a number of overloads, also when there is a chance of fa tigue failure. The power up routine will be interrupted when the lift c ounter exceeds 16383 lifts or the overload counter exceeds 1023 overloads. If the screen displays LFCnt when unit is powered on : 1. Push TARE to display the 25% lift counter. 2. Push TARE again to see the overload lift counter. 3. Push the ZERO key to acknowledge the warning and return to standard scale operatio n. NoteThe power up warning message won't appear again for another 16383 lifts ( or 1023 overloads). 1) Program a user function key to be TEST (see function key setup) For this example, F1is programmed as TEST. 2) Press F1- TEST. 3) Within two seconds of pressing the F1– TEST key, press F1again (must be F1 regardless of which key is programmed as TEST). The test will sequence through steps 4 to 7 automatically unless you stop it by pressing F2 immediately, then using F1 and F2 each parameter can be observed statically. 4) The display flashes LFCnt (for lift counter) followed by the number of times the weight has exceeded 25% of capacity. 5) Next, the display flashes OLCnt (for overload counter) followed by the number of times the weight has exceeded capacity. 6) Next,the display flashes the C- Cal value. 7) The Dyna-Link returns to standard weighing mode. If you interrupted the auto sequence, press ZERO to return to tension link mode. /)&QW 2/&QW Return to standard weight display ENTER/SELECT F1 Number of Lifts above 25% of Capacity Number of Lifts that exceeded Capacity example value example value Start of Test Sequence All segments on &&D/ blinking blinking example C-Cal value Fx Figure 5-6 Access the Service Counters WARNINGOnly a MSI factory representative can reset the service counters, as these are important safety warning features. Depending on the circumstances, a thorough lo ad train inspection might be necessary to ensure user safety. Reference MSI’s “Crane Scale Safety and Periodic Maintenance manual” (Pub. 243-08-94D) for proper loadin g techniques to improve the safety and longevity of your MSI-7300 crane scale. This publication is available at www.msiscales.com and is included in the CD shipped with your crane scale.
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36 MSI-7300 Operator’s Manual 6.0 Communication Setup The Dyna-Link 2 can communicate with peripheral devices using RS-232 or 802.15.4 wireless. Only one communications type can exist at a time. The RS-232 port located on the bottom side of the Dyna-Link 2 is useful for setup and calibration using a computer and MSI’s SCCMP Software (SCCM P operation is detailed in the SCCMP User Guide). 6.1 RF Option Since the RF options are easily connected they are commonly used for gathering weight data after the initial setup of the unit. For RF operation, the Dyna-Link 2 uses an 802.15.4 transceiver to communicate with the MSI-8000 RF Remote Display. 802.15.4 wireless: • operates in the 2.4GHz ISM band and does not require the end user to obtain a licens e. • can coexist with other 2.4GHz systems if caution is taken to isolate antennas at least 10 feet or 3 meters from the Crane Scales and MSI-8000 equipment. MSI-8000 based RF systems are peer to pe er . However, for multiple scale connections, the MSI-8000 acts as the network coordinator. Number entry screen0 TA R E F2 Exit and Cancel Changes Exit and Save/Back 1 Level Enter / Select ScrollIn Menu Key FunctionsPRINT STRINGS 6WUQ*&QWUO 5DWH2II 8VHU /RDG &RQWOff(default) F key On Stable Load Continuous PRINT CONTROL Print String Output Rate Number entry screen (0-65535 seconds) Print String Format 1= Current Wt (Wt-Unit-Mode )2= Net Wt (Wt-Unit-Net )3= Gross Wt (Wt-Unit-Grs )4= Tare Wt (Wt-Unit-Tare )5= Total Wt (Wt-Unit-Total )6= Total Count (#Samples-TCNT )7= Current Wt (no units or mode )8= (Reserved)9= CR-LF () Affects cont- inuous mode only 3ULQW U)Print RF COMM SETUP MENU 2Q2IIFLG&KQ/ QHWLGEnable RF ScaleCore ID RF Channel Network ID RF SETUP Setup Strings Print Control Output RateNetwork ID 2Q 2II Range 1-254, (20-30) Range 12-23 Range 0 to 99999 RF Network Number entry screens F2 Press Simultaneously F1F2 6WU(Q Figure 6-1 COMM Setup Menu