AccuPro-5000
™
MEASUREMENT SYSTEM OPERATOR MANUAL
Issued by Department:
Engineering
Doc. Number:
5000-00-00-002
Revision:
02
Effective Date:
10/05/2021
File: 5000-00-00-002-r2_
AccuPro_5000_Operator_Manual
Copyright© 2021 Scaletron Industries, Ltd
All Rights Reserved
Page
36
of
63
8.3.1
Procedure
The procedure for navigating the Dead Weight submenu follows the control flow diagram depicted in
Figure 17.
Figure 17: DEAD WEIGHT Control Flow Diagram
a.
For a dual-channel system, first select the desired channel for which to conduct the procedure. The
number of any chosen active channel will be indicated in the upper-left corner of the display for the
remainder of this submenu.
b.
Given that Dead Weight adjustment requires that accurate weight calibration procedures
immediately follow, the user is first asked to confirm the menu selection via
an “
RU
Sure?” prompt
,
for “Are You Sure?” A “Yes” response will continue
with the procedure
; a “No” response will exit the
submenu.
c.
The applied voltage offset representation of the internal 6-bit DAC Offset value is displayed on the
bottom line, left side. This is a bipolar value in mV units, having 31 steps in each direction, from
zero, yielding a range of (-77.5 mV to +77.5 mV) with a step size of 77.5/31 = 2.5 mV. This voltage
is internally added to the input voltage from the selected channel’s load cell
(s).
d.
The decimal representation of the real-time, raw 24-bit ADC count is also displayed on the bottom
line, right side. The value is the average of 100 randomized samples to help smooth any signal
fluctuations. This is a unitless, positive value having a range of 0 to 16,777,215 (0x0 to 0xFF FFFF).
e.
Use the Arrow Keys or Rotary Knob to adjust the DAC Offset value to minimize the ADC count value
WITHOUT clipping it to 0. If a clipped value is enter
ed, an “Invalid Entry” message
is momentarily
displayed prior to providing the user another opportunity to re-enter a valid value.
EXIT
Raw ADC Count
Path taken following a short delay.
Path taken when ENTER Key pressed.
Path taken when ARROW Key pressed.
Changes Offset
Value (mV)
1: DEAD WEIGHT
RU Sure? No
1: DEAD WEIGHT
RU Sure? Yes
1: DEAD WEIGHT
+2.5mV 5218780
1: DEAD WEIGHT
Please Wait...
1: DEAD WEIGHT
Invalid Entry
Offset
Value