User`s manual

Accurate Technology ProScale Page 38 of 48
Limit Mode
The Display will show either “LL“ for Lower Limit or ”UL” for Upper Limit if a
pre-programmed upper or lower reading is encountered. Upper and Lower
Limits are set with Programming Parameters Pr16 and Pr17 but are only
active if Pr14 is set to 2. The readout toggles for 2 seconds between current
position display and "LL" or "UL". This continues as long as limit is exceeded.
(Programming Parameters 14, 16, 17)
Caution: Limit monitoring is always active, even in programming mode.
Scaling
All General Purpose Displays have the ability to “scale” the actual
measurement. This function is useful when the actual measurement must be
multiplied or divided before being displayed. Care should be taken when
using this function since invoking it will cause the unit to display a reading
different than the actual measured value.
(Programming Parameter Pr7)
Compensation Mode
When making measurements within the compensated range, the display will
automatically apply the linear interpolation compensation and display the
corrected position on the LCD. See Section 3: COMPENSATION CALIBRATION.
When the ProScale is operated outside the compensated range the LCD will
alternate between the uncompensated position measurement display and
“no Co” message. This indicates the ProScale is not within compensation
range.
(Programming Parameters Pr27, 28)
Backlighting (24VDC Displays only)
LCD backlighting can be configured to always remain OFF, to always remain
ON or to come on when any key is pressed and then remain on for 3, 7 or 15
seconds.
(Programming Parameter 22)
Monitor Signal Output (24VDC Displays only)
A connector provides a solid-state output (.1A / 30 VDC) that can be
configured to activate on either a position drift (MONitor) condition or a
measurement limit (LIMIT) error. The output can be configured for normally
open (N/O, not conducting to ground) or normally closed (N/C, conducting to
ground). Although the Display LCD flashes when either a position drift
(MONitor) condition or a measurement limit (LIMIT) error is encountered, the
output signal only changes state once for out of limit condition and then
toggles back when an in limit condition is restored. Pr14 should be set to 1.
Caution: These functions are active during Programming. If parameters are
changed during Programming the output signal could become active
immediately!
(Programming Parameters 14 and 15)