MSI Dyna-Link 2, Руководство оператора, Страница: 20 / 61

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.