User Manual - Version 2.2 Manual

84 Counterpart User Manual
2. Remove all weight from the scale, then watch the indicator display to determine the magnitude of
vibration effects on the scale. Record the weight below which all but a few readings fall. This value is
used to calculate the DFTHRH parameter value in Step 4.
For example, if a heavy-capacity scale produces vibration-related readings of up to 50 lb, with
occasional spikes to 75 lb, record 50 lb as the threshold weight value.
3. Place the indicator in menu mode and set the digital filters (DFL
TRx) to eliminate the vibration effects
on the scale. (Leave DFTHRH set to NONE.) Reconfigure as necessary to find the lowest effective
values for the DFLTRx parameters.
4. With optimum values assigned to the DFLTRx pa
rameters, calculate the DFTHRH parameter value by
converting the weight value recorded in Step 2 to display divisions:
threshold_weight_value / DSPDIV
In the example in Step 2, with a threshold weight value of 50 lb and a display division value of 5lb: 50 /
5lb = 10DD.
DFTHRH should be set to 10DD for this example.
5. Finally, set the DFSENS parameter high enough to ignore transient peaks. Longer transients (typically
cau
sed by lower vibration frequencies) will cause more consecutive out-of-band readings, so DFSENS
should be set higher to counter low frequency transients.
Reconfigure as necessary to find the lowest ef
fective value for the DFSENS parameter.
9.6.4 Audit Trail Support
Audit trail support provides tracking information for configuration and calibration events. To prevent potential
misuse, all configuration and calibration changes are counted as change events.
Use the Audit menu or Revolution to di
splay audit trail information. This includes the legally relevant (LR)
version number (software version for the code that provides audit trail information), a calibration count and a
configuration count.
Audit trail information can be printed from Revolution
or by sending the DUMPAUDIT serial command.
9.7 USB Keyboard Interface
The USB interface option board provides a type-A connection for a USB keyboard interface. To use the keyboard
interface, set the serial input function for Port 3 (found under the SERIAL menu - see Figure 3-10 on page 36) to
KEYBOARD.
Table 9-4 summarizes the Counterpart specific functions provided by the keyboard interface, most other
alphanumeric and navigational keys provide functions equivalent to those typical for PC operation.
Menu
parameters and serial commands that affect the indicator keypad operation (including KBDLCK, ZERONLY,
and KLOCK serial commands also affect the remote keyboard.
• The keyboard interface is hot-pluggable.
• Caps lock is functional (of
f at indicator power
up).
• Num lock is on and cannot be turned off
• Scroll lock is not supported
• Other USB devices are not supported
Key Function
F1 Softkey 1
F2 Softkey 2
F3 Softkey 3
F4 Softkey 4
F5 Unit Weight key
F6 (Alt + z) ZERO key
F7 (Alt + g) GROSS/NET key
F8 (Alt + t) TARE key
F9 (Alt + u) UNITS key
F10 (Alt + p) PRINT key
F11 Not used
F12 MENU key
Print Screen PRINT key
Table 9-4. USB Keyboard Functions
Note