Rice Lake iQube 920i Installation Manual Download Page 5

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iQUBE

Installation Manual

Configuration consists of the following steps:

Define Load Cells:

This is the electrical sensitivity

(mV/V output) and capacity specification of the load
cells. Load cell names and serial number can also be
specified.

Define Platforms:

A platform is a contiguous weigh

bridge. Any

iQUBE

board can assign load cells to two

separate platforms. A maximum of four platforms can
be defined in an

iQUBE

system. The relationship

between load cells is also defined as a paired or
circular arrangement.

Define Systems:

The platforms can be assigned to a

system. Up to four unique systems can be defined,
however the

920i

will only support one system per

serial channel.

Load Cell Trimming and Calibration

Cal-Match

™

calibration calculates the load cell trim

based on a comparison of the signal generated by an
applied weight for each load cell to the signal
generated by all other load cells. If a known test
weight value is used, this calibration also sets the span
for the scale.

T h r e e t y p e s o f C a l - M a t c h c a l i b r a t i o n c a n b e
performed using the

iQUBE

. Each type of calibration

captures the initial dead load of the scale and provides
a means to trim the outputs of the load cells.

Cal-Match Theoretical calibration

allows each cell

to be zeroed and trim factors calculated. Based on the
cell capacity and sensitivity, the

iQUBE

calculates

weight values based on the total signal from all of the
cells.

Cal-Match Section calibration

requires a weight to

be placed over each section. Trimming can be
performed by running a weight cart down the middle
of the platform, stopping for calibration of each
section.

Corner calibration

requires weight to be placed over

each cell individually. Corner trimming can be
performed for platforms using an even or odd number
of cells.

Diagnostics (Error 2)

Diagnostic functionality can be enabled for the

iQUBE

to identify abnormal load cell outputs. This is based
on the reference established through cell associations.
The diagnostic conditions that can be identified for
paired configurations are open bridge or channel, zero
reference tolerance, drifting, peak-to-peak noise, and
out-of-balance conditions. Diagnostic conditions
recognized for circular configurations are limited to
open bridge or channel, drifting, and peak-to-peak
noise.

Error conditions generate a displayed error message if
connected to the

920i

which, with an Ethernet card,

can be configured to e-mail the alert message to an
address. In addition, there is a visual LED indication
on the connector board to identify any load cell that
appears to have an abnormal condition.

Cell Emulation

Cell emulation allows the output of a failed load cell
to be emulated. Automatic or manual cell emulation
can be specified (limited to one cell per scale system),
using either truck scale (Type 1) or tank/hopper/floor
scale (Type 2) emulation algorithms.

NOTE:

atisfactory results from cell emulation require the

load to be centered and the scale installation to be plumb and
level.

1.1

System Configurations and Options

Table 1-1 lists

iQUBE

model and option part numbers.

920i

part numbers listed are for models without A/D

cards.

Model / Option