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
35
of
63
•
No AOB Configuration
: (Alert) Indicates that Factory calibration and configuration data was
not yet saved into the Analog Output Board
’s
(AOB) Flash memory.
•
Over Capacity
: (Alert
) Indicates that the scale measurement exceeds the system’s maximum
capacity as configured during factory calibration, and therefore may represent an invalid value.
The displayed measurement value will also blink during this condition.
•
Relay Setpoint Triggered
: (Alert / Optional Alarm) Indicates that a scale measurement crossed
the setpoint threshold as predefined by the user.
The assertion of an Alarm condition triggers the External Alarm Relay located on the Main Processor
Board. The relay is AC/DC rated and provides normally-open, common, and normally-closed contacts
for the user to connect to an external indicator of their choice. An Alarm condition can also be
configured to trigger an internal buzzer (See main menu option titled
.) Once asserted,
the External Alarm Relay and internal buzzer, if enabled, will be negated (silenced) when the
Alerts/Alarms menu is first entered. They will remain negated even if the trigger conditions that first
asserted them still remain.
In a dual-channel system, the display will identify which channels are indicating an Alerts/Alarms
condition. The user must first select a desired channel to be evaluated before scrolling through all the
messages for the respective channel. Whenever the displayed message pertains to an Alarm condition,
its respective latched state is negated, or reset. Upon exiting the Alerts/Alarms menu, the system status
will be re-evaluated before updating the Alerts/Alarms status notification.
8.3
Dead Weight
Select this menu option by pressing the Enter Key while the display appears as shown in Figure 16.
Figure 16: DEAD WEIGHT Menu Option
This menu provides a factory technician a means to reduce an unwanted component of the load-
cell’s
output voltage attributed to the weight of the
scale’s
physical base itself. The procedure is not performed
by entering an actual weight value, but rather involves adjusting the value of the
Bridge Transducer’s
internal 6-bit Offset Digital-to-Analog Converter (DAC)
to “offset”
any unwanted input voltage when
the scale is unloaded. In this manner, a greater working bandwidth is made available for resolving the
desired scale measurement via the internal 24-bit Analog-to-Digital Converter (ADC). During Dead
Weight DAC adjustment, the analog gain level is configured to maximum for increased sensitivity, while
the Zero-Offset and Gain (Full-Scale) Calibration registers are set to default (neutral) values. Following
entry of the Dead Weight DAC adjustment, a working set of calibration values are computed and stored
for each of four analog gain levels.
DEAD WEIGHT
