MSI Dyna-Link 2 User manual

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MSI-7300
Dyna-Link 2 Tension Dynamometer
Operator’s Manual
PN 152160 Rev C

Technical training seminars are available through Rice Lake Weighing Systems.
Course descriptions and dates can be viewed at www.ricelake.com/training
or obtained by calling 715-234-9171 and asking for the training department.
Contents
1.0 Introduction ................................................................................1
1.1 Safety .......................................................................................... 2
1.2 Key Descriptions ........................................................................ 3
1.3 General Information ................................................................... 4
1.4 MSI-7300 Annunciators ............................................................. 6
1.5 Specifications .............................................................................7
1.5.1 Standard Capacities and Resolution ..........................................8
1.6 Features ...................................................................................... 9
1.7 Options ..................................................................................... 10
1.8 Unpacking ................................................................................ 10
1.9 Assembly .................................................................................. 10
1.10 Battery Replacement ............................................................... 11
2.0 Operation ..................................................................................12
2.1 Power ....................................................................................... 12
2.2 Zero .......................................................................................... 12
3.0 User Key Functions (F1and F2) ................................................13
3.1 OFF ........................................................................................... 13
3.2 TEST ......................................................................................... 13
3.3 TOTAL ....................................................................................... 13
3.3.1 MANUAL TOTAL .....................................................................13
3.3.2 AUTO TOTAL ..........................................................................14
3.4 Clear Total ................................................................................ 14
3.5 Net / Gross ...............................................................................14
3.6 TARE ......................................................................................... 14
3.6.1 To Tare and Display the Net Tension .......................................15
3.6.2 To Clear the Tare and Revert to Gross Tension .......................15
3.6.3 Tare- Rules for Use: ................................................................15
3.7 PEAK HOLD .............................................................................. 15
3.8 2-UNITS/ 5-UNITS .................................................................... 16
3.9 HI-RES ...................................................................................... 17
3.10 PRINT ....................................................................................... 17
4.0 Dyna-Link Setup .......................................................................18
4.1 Menu Map ................................................................................ 18
4.2 Function Keys ..........................................................................19
4.3 Auto-Off .................................................................................... 20
4.4 Setpoints .................................................................................. 21
4.5 Total Mode ............................................................................... 23
4.6 Units .......................................................................................... 24
4.7 Filter Setup ............................................................................... 25
5.0 Calibration ................................................................................26
5.1 Calibration Menu ...................................................................... 26
© Rice Lake Weighing Systems. All rights reserved. Printed in the United States of America.
Specifications subject to change without notice.
Rice Lake Weighing Systems is an ISO 9001 registered company.
June 8, 2015

ii MSI-7300 Operator’s Manual
Rice Lake continually offers web-based video training on a growing selection
of product-related topics at no cost. Visit www.ricelake.com/webinars.
5.2 Initial Calibration ...................................................................... 29
5.3 Guidelines for Capacity and Resolution .................................31
5.4 C-Cal Calibration ...................................................................... 32
5.5 Auto Zero Maintenance (AZM) ................................................ 34
5.6 Service Counters ...................................................................... 35
6.0 Communication Setup .............................................................36
6.1 RF Option ................................................................................. 36
6.2 Printer Setup ............................................................................37
6.2.1 Standard Print Strings .............................................................38
6.2.2 Printer Output Setup ...............................................................39
6.3 Comm Port Hardware .............................................................. 41
6.4 802.15.4 RF Network Setup ..................................................... 42
6.5 FCC Statement (For 802.15.4 Option) ..................................... 45
6.6 International RF CERTS (For 802.15.4 Option) ....................... 45
7.0 Appendix ..................................................................................46
7.1 Troubleshooting ....................................................................... 46
7.2 Error Codes .............................................................................. 48
7.3 Mechanical Dimensions ........................................................... 49
7.4 Firmware Update Procedure ...................................................50
The MSI Limited Warranty ............................................................52

Introduction 1
1.0 Introduction
The MSI-7300 Dyna-Link 2 is a combination of the sound and proven mechanical
design of the industry standard Dyna-Link with today’s most advanced electronics to
provide a superb feature set unmatched by any dynamometer in its class or price
range.
The Dyna-Link 2 is versatile, reliable, accurate, and easy to operate. The multi-
purpose tension dynamometer is ideal for situations in which headroom is at a
minimum. It is designed with safety factors exceeding the industry standard and is
fully sealed for outdoor use in any weather.
A remote display option is available to further enhance the safety and usability. The
optional RF remote display allows tension monitoring from a distance and adds the
ability to print and store data.
If you have any questions or comments, please contact
MSI Scales
Phone (toll free): 1-800-874-4320
MSI SCALES
Authorized distributors and their employees can view or download this
manual from the MSI Scales distributor site at: www.msiscales.com.

2 MSI-7300 Operator’s Manual
1.1 Sa f ety
Safety Symbol Definitions:
Important
WARNING
Indicates a potentially hazardous situation that, if not avoided,
could result in serious injury or death, and includes hazards that
are exposed when guards are removed.
Indicates information about procedures that, if not observed,
could result in damage to equipment or corruption to and loss of
data.
General Safety
WARNING
Do not operate or work on this equipment unless you have read and
understand the instructions and warnings in this manual. Contact
any Measurement Systems International dealer for replacement
manuals. Proper care is your responsibility.
Failure to heed may result in serious injury of death.
DO NOT allow minors (children) or inexperienced persons to operate this unit.
DO NOT stand near the load being lifted as it is a potential falling hazard. Keep a
safe distance.
DO NOT use for purposes other then weight taking or dynamic load monitoring.
DO NOT use any load bearing component that is worn beyond 5% of the original
dimension.
DO NOT use the dynamometer if any of the components of the load train are
cracked, deformed, or show signs of fatigue.
DO NOT exceed the rated load limit of the dynamometer, rigging elements, or the
lifting structure.
DO NOT allow multi-point contact with the shackles of the dynamometer unit.
DO NOT allow high torque on the dynamometer unless it is specifically designed
for high torque.
DO NOT make alterations or modifications to the dynamometer or the shackles.
DO NOT use improperly rated or sized shackles. Use only MSI recommended
shackles.
DO NOT remove or obscure warning labels.
For guidelines on the safe rigging and loading of overhead scales and
dynamometers, read the "MSI Crane Scale Safety and Periodic Maintenance
Manual" (available at www.msiscales.com).
Keep hands, feet and loose clothing away from moving parts.
There are no user serviceable parts within the Dyna-Link 2. Any repairs are to be
performed by qualified service personnel only.

Function key LEDs Battery low
Stable
Center of zero
5 Digit 1.22 in (31mm)
Sunlight visible
LCD Tension Display
Units with maximum capacity of
100000 lb and up come with a 6 digit 
1 in (26 mm) display.
Note
Setpoint
alarm LEDs Units & tension
mode annunciators
User programmable
function keys
Introduction 3
Figure 1-1. MSI-7300 Front Panel
1.2 Key Descriptions
POWER
Power Key - Turns the Dyna-Link 2 on and off.
Used as cancel or last menu in the menu mode.
ZERO
Zero Key - Used to zero out residual tension on the link.
Used as enter or save in the menu mode
Common uses are units change or peak hold for dynamic testing.
F1- Programmable to user selectable functions, see Section 3.0.
Default – peak hold.
Functions as the ENTER/SELECT key in the menu mode.
F2 - Programmable to user selectable functions, see Section 3.0.
Default – display & function test.
Functions as the scroll key in the menu mode.

4 MSI-7300 Operator’s Manual
1.3 General Information
1. If the text is discussing a function key, the function key will be displayed as Fx-
YYYYY with the programmed user key function in italics. F1 and F2 can both be
programmed to all available user functions.
2. If a function key does not work, it is probably because the Dyna-Link 2 is not
setup to support the key. For example, if the Function key is set for TOTAL, you
must also setup the TOTAL mode in the setup menu.
3. When in setup menus, the ZERO key drops back one menu level. At the root
menu level, the ZERO key stores the changes and returns to the tension mode.
4. When in setup menus, the POWER key returns you directly to the tension
display without storing the changes.

5000 lbs / 2500 KG
MAXIMUM CAPACITY
7300
lb
Top shackle interface
Cotter pins
Battery
access
cover
Bottom shackle interface RS-232 port
Introduction 5
Figure 1-2. Dyna-Link 2

6 MSI-7300 Operator’s Manual
1.4 MSI-7300 Annunciators
The Dyna-Link 2 uses LCD annunciators to indicate tension mode and other
information.
Figure 1-3. MSI7300 Annunciators
Stable – indicates the tension force has settled within the motion window
(usually ±1d).
When standstill is off, the link will not zero, tare, or totalize.
Center-of-Zero – Indicates the tension is within 1/4 d of zero.
BT Low Battery – Appears when approximately 10% of battery life remains.
The BT symbol blinks when automatic shutdown is imminent.
Pk PEAK- Indicates peak hold mode.
Ttl TOTAL – Indicates the unit is displaying the total accumulated weight.
This is a temporary display lasting less than five seconds.
Net NET – Indicates the unit is in the net tension mode.
A tare weight is subtracted from the gross tension.
M
Metric Ton – In conjunction with the ton annunciator, indicates the unit is
displaying metric tons.
When used with the total display, it is used for X1000 to allow
accumulation of weight beyond the five digit display capacity.
It is also used with the service counters when the number of lifts exceeds
five digits.
kg kg – Indicates tension display is in kilograms.
kN kN – Indicates the tension display is in kilonewtons.
lb lb – Indicates tension display is in pounds.
Ton
Ton – Illuminated alone, indicates the unit is displaying in US short tons
(1 ton = 2000 lb).
When illuminated along with the ‘M’ the unit is displaying in metric tons
(1 metric ton = 1000 kg)
SETPOINTS – User programmable setpoints for early overload warnings.
Setpoints 1 and 2 are high brightness red LEDs
F1 F2 – These blue LEDs are used to indicate various operational features
of functions programmed into the F1 and F2 keys.
Example: In peak hold mode the associated LED will blink whenever a
new peak reading is captured.
0

Introduction 7
1.5 Specifications
Table 1-1. MSI-7300 Specifications
Accuracy Rated accuracy: ±0.1% of capacity. Typical accuracy ±(0.1%+1d) of
reading. ‘d’ equals one displayable increment.
Resolution Standard displayed resolution: 2000-2500 ‘d’ . Hi-Res mode increases
resolution to 5000-6250 ‘d’. Internal A/D resolution: 24 bits.
Overload
Power
Display
Operating
Temp
Operating
Time
Load Cell &
Enclosure
Load Cell
F1 and F2
Calibration
Auto Zero
Maintenance
Auto-Off
Mode
Units
Filtering
Totalization
Peak
Setpoints
Service
Counter
WARNING
The MSI-7300 has a safe mechanical overload of 200% of capacity.
Overloads greater than 200% may result in physical damage to the
link. The ultimate overload is rated to 500%-700% of capacity (see
Table 1-2). At ultimate overload, structural failure and dropped
loads may occur. Dropped loads may cause serious personal injury
or death.
Safe link mechanical overload, 200% of capacity. Ultimate link overload,
>500% of capacity. Typical ultimate overload is 700% or greater. Note that
the Dyna-Link is designed to have a greater safety factor than the connecting
shackles which have a typical ultimate safety factor of 600%
Battery operated, see Table 1-2 for battery size and quantity per unit.
Alkaline cells can be replaced with rechargeable NiMH cells.
Five digit, 1.22 in (31 mm) numeric digits.
Six digit, 1 in (26 mm) on 100000 lb units and higher
- 40°F to +122°F (-40°C to +50°C), Rated accuracy range -10°C to +40°C.
>150 hours typical (Alkaline C cells) / >300 hours typical (Alkaline D cells).
NEMA Type 4/IP65 anodized aluminum, 2024-T351 Aircraft Quality.
2000 ΩBridge
Programmable multifunction buttons for use as TEST, TOTAL, UNIT, PEAK,
TARE, NET/GROSS, VIEW TOTAL, PRINT AND High Res mode.
Fully digital calibration from the front panel or through a computer interface.
Standard, can be disabled internally.
Prolongs battery life by turning the power off after 15, 30, 45, or 60 minutes
(operator determined) of no Dyna-Link activity.
kg, lb, Tons (US short ton), Metric Tons, kilonewtons (other Units available
with custom calibrations).
Selectable - OFF, Low (LO), Medium (HI-1), High (HI-2).
Standard - Press button or automatic; TOTAL weight up to 99999 X1000
units
Uses unfiltered faster reading of A/D, (>220 readings per second).
Two internal standard setpoints and two ultrabright LEDs on indicator panel
Two independent 16 bit registers; register 1 updated each time the force
exceeds 25% of capacity; register 2 updated each time the force exceeds
overload; when register 1 exceeds 16383 or register 2 exceeds 1023,
display reads “LCnt” for load cell counter; test function shows the two
readings in order.

8 MSI-7300 Operator’s Manual
1.5.1 Standard Capacities and Resolution
Table 1-2. Standard Capacities and Resolutions
Capacity
Std
‘d’
Std
Counts HiRes ‘d’
HiRes
Counts
Ultimate
Overload Config
1000 lb
500 kg
0.5 Ton
4.9 kN
0.5 lb
0.2 kg
0.0002 T
0.002 kN
2000
2500
2500
2450
0.2 lb
0.1 kg
0.0001 T
0.001 kN
5000
5000
5000
4900
>>700% Alum
2 C-Cells
2500 lb
1250 kg
1.25 ton
12.25 kN
1 lb
0.5 kg
0.0005 T
0.005 kN
2500
2500
2500
2450
0.5 lb
0.2 kg
0.0002 T
0.002 kN
5000
6250
5000
4900
700% Alum
2 C-Cells
5000 lb
2500 kg
2.5 Ton
24.5 kN
2 lb
1 kg
0.001 T
0.01 kN
2500
2500
2500
2450
1 lb
0.5 kg
0.0005 T
0.005 kN
5000
5000
5000
4900
700% Alum
2 C-Cells
10000 lb
5000 kg
5.0 Ton
4.9 kN
5 lb
2 kg
0.002 T
0.02 kN
2000
2500
2500
2450
2 lb
1 kg
0.001 T
0.01 kN
5000
5000
5000
4900
700% Alum
2 C-Cells
25000 lb
12500 kg
12.5 Ton
122.5 kN
10 lb
5 kg
0.005 T
0.05 kN
2500
2500
2500
2450
5 lb
2 kg
0.002 T
0.02 kN
5000
6250
6250
6125
700% Alum
2 D-Cells
50000 lb
25000 kg
25 Ton
245 kN
20 lb
10 kg
0.01 T
0.1 kN
2500
2500
2500
2450
10 lb
5 kg
.005 T
0.05 kN
5000
5000
5000
4900
600% Alum
2 D-Cells
100000 lb
50000 kg
50 Ton
490 kN
50 lb
20 kg
0.02 T
0.2 kN
2000
2500
2500
2450
20 lb
10 kg
0.01 T
0.1 kN
5000
5000
5000
4900
550% Alum
2 D-Cells
120000 lb
60000 kg
60 Ton
588 kN
50 lb
20 kg
0.02 T
0.2 kN
2400
3000
3000
2940
20 lb
10 kg
0.01 T
0.1 kN
6000
6000
6000
5880
500% Steel
2 D-Cells
180000 lb
90000 kg
90 Ton
882 kN
100 lb
50 kg
0.05 T
0.5 kN
1800
1800
1800
1764
50 lb
20 kg
0.02 T
0.2 kN
3600
3600
4500
4410
500% Steel
2 D-Cells
260000 lb
130000 kg
130 Ton
1275 kN
100 lb
50 kg
0.05 T
0.5 kN
2600
2600
2600
2550
50 lb
20 kg
0.02 T
0.2 kN
5200
6500
6500
6375
500% Steel
2 D-Cells
380000 lb
190000 kg
190 Ton
1863 kN
200 lb
100 kg
0.1 T
1 kN
1900
1900
1900
1863
100 lb
50 kg
0.05 T
0.5 kN
3800
3800
3800
3726
500% Steel
2 D-Cells
550000 lb
225000 kg
225 Ton
2206 kN
200 lb
100 kg
0. 1 T
1 kN
2750
2250
2500
2206
100 lb
50 kg
0.05 T
0.5 kN
5500
4500
5000
4412
440% Steel
3 D-Cells
Note
Short ton and metric ton resolutions are the same.

Introduction 9
1.6 Features
• Designed to meet or exceed all U.S. and International safety and environmental
standards.
• Greater than 150 hours operation with two standard Alkaline ‘C’ cells. Greater
than 300 hours with two standard Alkaline ‘D’ Cells (25000 lb/12500 kg
capacities and above). Also works with off the shelf NiMH rechargeable cells.
• Automatic power off conserves battery life by sensing no activity after 15,30,45
or 60 minutes, determined by operator, and turns power off.
• Rugged construction throughout. IP65/NEMA Type 4 for outdoor use.
• Designed for use with USA made Crosby shackles (optional).
• Shackle holes reinforced with steel sleeves (25000 lb/12500 kg capacities and
above) to reduce wear.
• Shackle stops ensure ease of mounting. The stops prevent the shackles from
falling to the side of the unit and are held in position for easy rigging.
• MSI’s ScaleCore technology provides precision, high resolution (2500 division
standard and up to 10,000 possible) 24 bit A/D conversion coupled with an
advanced RISC microcontroller.
• Five large, 1.22 inch (31 mm) LCD digits for clear tension readings from a
distance. Six digits, i in (26 mm) on units 100,000 lb and over.
• Easy to maintain: Full digital calibration assures reliable, repeatable
measurements. Can be calibrated without test weights using MSI C-Cal
technology.
• Selectable kg/lb/tons (US Short)/metric tons/kilonewtons.
• Automatic or manual weight totalization for loading operations.
• Easily customized for special applications.
• Hi speed PEAK mode for stress and drop test analysis.
• Two setpoints can be set for any in-range tension/weight value for operator alerts
or process control. Optional audible alarm output.
• ScaleCore technology provides quick and easy firmware updates and calibration/
setup backup.
• Two Service counters ensure load train safety by warning the user to perform
safety checks when the lift count gets high or the Dyna-Link has been overloaded
repeatedly. Counter 1 (LFCnt) records the number of lifts above 25% of capacity.
Counter 2 (OLCnt) records the number of times the Dyna-Link overloads.

10 MSI-7300 Operator’s Manual
1.7 Options
Options which you may have ordered with your Dyna-Link 2 may include the
following:
• Audible alarm (triggered by setpoint 1)
• Top and bottom shackles
• Portable carry case
• Serial I/O cable (RS-232)
• RF remote display (will also operate hard-wired). See RF remote display for
ScaleCore user guide.
• Hardwired cable for remote display.
• RF remote modem, RS-232, for direct connection to computers, scoreboards, or
serial printers. See RF modem for ScaleCore user guide.
• RF remote modem, USB, for direct connection to computers. See RF modem for
ScaleCore user guide.
• RF remote gateway for direct connection to an Ethernet LAN and for use with
MSI’s SCCMP program. See RF modem for ScaleCore user guide.
• RF or hardwired scoreboard display.
1.8 Unpacking
When unpacking the Dyna-Link 2 from the shipping container, ensure that all
assembly parts are accounted for.
Check for any visible damage and immediately report any damage to your shipper.
Retain the original shipping container for future shipping or transporting.
1.9 Assembly
1. Identify and locate the following:
• Batteries, two ‘C’ cells or ‘D’ cells depending on capacity
• Top shackle and pin (option or customer supplied)
• Bottom shackle and pin (option or customer supplied)
• Two cotter pins
2. Slide top shackle over load cell and insert the pin.
3. Screw the shackle nut onto the pin.
WARNING
Note
Note
It is not necessary or desirable to tighten the nut too tight. Make sure
the nut is down far enough to expose the cotter pin hole.
4. Lock the shackle pin in place with the supplied cotter pin. Bend the cotter pin.
5. Repeat steps 1-3 for the bottom shackle.
6. Remove the battery access port cover with a coin or a large screwdriver.
7. Insert the two batteries, positive end first, into the battery shaft.
8. Reinstall the battery access port cover. The Dyna-Link 2 is now ready for use.
The Dyna-Link2 will automatically start when the batteries are
installed.
The Dyna-Link 2 load train will be unsafe for use if the shackle pins
are not properly secured with cotter pins.

Introduction 11
1.10 Battery Replacement
Disposable Batteries
The BT annunciator will display when the is battery is beginning to get low. When the
BT annunciator starts to blink, the batteries are close to being completely drained. For
maximum life, use the batteries until the system shuts off.
Rechargeable Batteries
When using Nickle-Metal-Hydride (NiMH) Cells, it is recommended that the cells
are recharged immediately after the BT annunciator starts to blink. Do not allow the
batteries to discharge completely, it may compromise the recharge life of the battery.
NiMH Cells in C and D sizes have a lower capacity then the Alkaline C and D sizes.
MSI recommends having two sets of NiMH batteries, so one set can be charging
while the other is in use.
Note
NiMH ‘D’ cells are often repackaged ‘C’ cells so you don’t get an
increase in battery life for Dyna-Links large enough for ‘D’ cells.
The use of NiCad batteries is not recommended.
If the Dyna-Link 2 will not be used for an extended period, the batteries should be
removed. A small current is used when powered off which will discharge the batteries
in about six months.

12 MSI-7300 Operator’s Manual
2.0 Operation
2.1 Power
To turn on the Power
1. Press
POWER
.
• The LCD will show all segments for a display test.
• The software version number will display.
The Dyna-Link 2 is ready for use.
2.2 Zero
Takes out small deviations in zero when the Dyna-Link 2 is unloaded. See Section 3.6
for zeroing (Taring) package or pallet weights.
Note
Note
The tension reading must be stable within the motion window for the
zero function to work.
1. Press
ZERO
. The display reads 0 (or 0.0 or 0.00, etc).
The backup memory stores the zero reading, and can restore it even if
power fails.
Zero - Rules for Use:
• Works in GROSS mode or NET mode. Zeroing while in NET mode will zero
the gross tension causing the display to show the negative tare value.
• The unit must be stable within the motion window, it will not zero until the
stable annunciator is on.
• The unit will “remember” that it has a zero request for two seconds. If motion
clears in that time, it will zero.
• The unit will accept a zero setting over the full range of the Dyna-Link. Zero
settings above 4% of full Dyna-Link will subtract from the overall capacity.
For example, if you zero out 100 lb on a 1000 lb Dyna-Link, the overall
capacity will reduce to 900 lb plus the allowed over-range amount.

User Key Functions (F1and F2) 13
3.0 User Key Functions (F1and F2)
There are optional functions that can be programmed for the function keys (F1 and
F2) on the front panel, as well as on the RF remote display. See Section 4.2 for setup
instructions.
Note
The functions PRINT (F3), and TARE are available full time on the RF
remote display.
3.1 OFF
No USER key function assigned. The F-Key is disabled.
3.2 TEST
The TEST function provides an LCD test that lights all LCD segments and the LED at
once and then counts from 00000 to 99999. Other internal tests are performed and if
any test fails, an error code will display. See Section 7.2 for a description of all error
codes.
3.3 TOTAL
Note
The Total Mode must be programmed from the setup menus before
the USER key will function. See Section 4.5.
For accumulation of multiple weighments. The accumulator always uses the
displayed weight, so GROSS and NET readings can be added into the same TOTAL.
There are four modes of totalizing: manual and three auto modes.
The manual mode requires the TOTAL key be pressed with the tension on the unit. The
tension will then be added to the previously accumulated value. This assures that a
weight on the scale is only added to the total once. Both the manual and three auto
total modes require that the tension on the Dyna-Link return below 0.5% (relative to
full scale) of GROSS ZERO or NET ZERO before the next weighment can be added.
Applied weight must be ≥1% of full scale above GROSS ZERO or NET ZERO
before it can be totaled.
3.3.1 MANUAL TOTAL
The Fx-TOTAL key under the MANUAL TOTAL mode functions in this manner:
1. With the tension at more than 1% of capacity, push the Fx-TOTAL key to add the
current tension to the TOTAL weight. The Fx LED blinks to indicate the tension
value was accepted. The TOTAL LCD annunciator and the total weight is
displayed for about five seconds, then the number of samples is displayed for
about two seconds.
2. Remove the weight, when the tension is less than 1% of capacity, place next
load to be accumulated on the unit.
3. Repeat until all loads to be accumulated have been added to the total.
4. To view the total weight accumulated, push the Fx-TOTAL key with the tension
at less than 1% of capacity (no weight on unit), the total weight will display for
five seconds (view total) without changing the total value. The TOTAL LCD
annunciator and the total weight is displayed for about five seconds and then the
number of samples is displayed for about two seconds.

14 MSI-7300 Operator’s Manual
3.3.2 AUTO TOTAL
The Fx-TOTAL key under the AUTO TOTAL mode functions as auto total on/auto
total off:
The auto mode has three variations which are programmed in the setup menu:
•AutoLoad – Any settled tension above the ‘rise above’ threshold will be
automatically totaled. Then the Dyna-Link must fall below the ‘drop below’
threshold before another total is allowed.
•AutoNorm – This mode takes the last settled weight to auto total with. The total
occurs only once the scale goes below the threshold. This allows the load to be
adjusted without a total occurring. Once the load is removed, the scale uses the
last settled reading for total.
•AutoHigh – Similar to the AutoNorm mode except the scale uses the highest
settled reading. Useful for loads that can’t be removed all at once.
3.4 Clear Total
The Fx-VIEW TOTAL key activates the total weight display followed by the number of
samples. While the display is showing the total, total is cleared by pressing ZERO.
3.5 Net / Gross
Switches the display between net and gross modes. Net tension is defined as gross
tension minus a tare weight.
To switch between net mode and gross mode:
1. Press the Fx-NetGross key (setup to the net/gross function).
2. The Fx-NetGross key will only function if a tare value has been established.
3. Switching back to gross mode from net mode will not clear the tare value. This
allows the operator to use the gross mode temporarily without having to reestablish
the tare value. Only clearing the tare or setting a new tare will change the tare value
held before switching into gross mode.
3.6 TARE
In force measurement applications, tare is useful as a way to display differential force.
By taring out a known force, only positive and negative deviations from the tared
force are displayed. This can also increase accuracy as any initial error is removed
leaving only slope error. In scale applications, tare is typically used to zero out a
known weight such as rigging, a packing container, or pallet and display the load in
NET tension/weight. To use tare, one of the two function keys must be configured to
the TARE function. A tare value is entered by pressing the Fx-TARE key. The TARE
function in the Dyna-Link 2 is defined as a tare-in/tare-out operation. The first press
of the Fx-TARE key stores the current tension/weight as a tare value and then the
Dyna-Link subtracts the tare value from the gross tension and changes the display to
NET mode. The next press of the Fx-TARE key will clear the tare value and revert the
display to GROSS mode. The optional RF remote display has a TARE key
permanently available.

User Key Functions (F1and F2) 15
3.6.1 To Tare and Display the Net Tension
1. Press (programmed as TARE).
2. The tension reading must be stable within the motion window for the tare
function to work.
3. The digits display 0 and the tension mode changes to NET.
4. The backup memory in the Dyna-Link 2 stores the tare reading, and can restore
it even if power fails.
3.6.2 To Clear the Tare and Revert to Gross Tension
1. Press (programmed as TARE).
2. The NET annunciator will turn off.
3. Absence of the NET annunciator is the only indication that you are in GROSS
tension mode.
Note
To view the GROSS tension without clearing the tare value, program
the remaining function key to the function NET/GROSS.
3.6.3 Tare- Rules for Use:
1. Only positive gross tension readings can be tared.
2. The stable annunciator must be on. The tension/force reading must be stable.
3. Setting or changing the tare has no effect on the gross zero setting.
4. Taring will reduce the apparent over range of the Dyna-Link. For example,
taring 100 pounds of rigging on a 1000 lb Dyna-Link, the Dyna-Link will
overload at a net tension of 900 lb (1000-100) plus any additional allowed
overload (usually ~4% or 9d).
5. The Dyna-Link stores the tare value in non-volatile memory is restored when
power is cycled.
3.7 PEAK HOLD
Peak hold will only update the display when a higher peak tension reading is
established. The peak hold function uses a high speed mode of the A/D converter
allowing it to capture transient tensions at a far higher rate than typical
dynamometers.
Peak hold is cleared and re enabled with the Fx-Peak Hold key. When a new peak is
detected, the Fx LED will flash three times. The accuracy of the system in peak hold
mode is slightly reduced to .2% of capacity ± 5d. The filter setting is turned off while
in peak hold mode to ensure the fastest acquisition rate.
Example Peak Hold Application
The peak hold function is useful in materials and ‘Fall’ tests. Common tests for fiber
rope include overall breaking strain (OB€), breaking force, and cycled breaking
strain. The Dyna-Link 2 combined with a force test stand, meets the speed and
accuracy requirements to properly conduct these tests.