MSI 7300 Dynalink 2 Manual

							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 
						

							






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) 
						

							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 
						

							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) 
						

							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.  
						

							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 
						

							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) 
						

							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 
						

							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.  
						

							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