ald523d Advanced Linear Devices Inc (ALD), ald523d Datasheet - Page 9

• Manufacturer Part Number: ald523d
• Description: Multifunction 7-digit Serial Input Display Module Controller
• Manufacturer: Advanced Linear Devices Inc (ALD)

In mode-A operation, the conversion factor “±CAL1”
parameters resulted from hardware calibration, and they
are scaled through the use of scale factor parameter “N1”
specified inside the DVM523.EXE program.
“±CAL2” and “±CAL3” parameters are obtained from
scaling the conversion factor “±CAL1” through the scale
factor parameters “N2” and “N3” specified inside the
DVM523.EXE
Conversion Factor (#2 Key) section in the ALD523D
Setup and Calibration Software User Guide on how to
implement these “N1”, “N2”, and “N3” scale factors.
In mode-B operation, the conversion factor “±CAL1”
parameters are generated from a ratiometric reference
value from the .MDS file, or from inputting “+CAL1” and
“-CAL1” conversion factors directly into the Input
Conversion Factor screen of the DVM523.EXE via the
keyboard.
scaled through the scale factor parameter “N1” from the
DVM523.EXE program. The “±CAL2” and “±CAL3”
parameters are obtained from scaling the conversion factor
“±CAL1” values through the scale factor parameters “N2”
and “N3” from the same Input Conversion Factor screen,
respectively. See Scale Conversion Factor (#2 Key) or
Input Conversion Factor = CAL1 (µV/CT) (#M Key)
section in the ALD523D Setup and Calibration Software
User Guide for implementation details.
In mode-C operation, the conversion factor “±CAL1”
parameter is defined from inputting “+CAL1” and “-
CAL1” conversion factors which are scaleable through the
scale factor parameter “N1” from the Input Conversion
Factor screen of the DVM523.EXE program. The
“±CAL2” and “±CAL3” parameters are obtained from
scaling the conversion factor “±CAL1” through the scale
factor parameters “N2” and “N3” from the same Input
Conversion Factor screen. See Input Conversion Factor =
CAL1 (µV/CT) (#M Key) section in the ALD523D Setup
and
information.
The “UNT1” parameter consists of 8 1-byte hexadecimal
numbers consisting of “UNT11” to “UNT18” parameters
located on the fourth line of the .CDS file (see Table 1 and
Table 3 of the ALD523D Setup and Calibration Software
User Guide for the data sheet layout and the hexadecimal
codes, respectively). When “DGS0” or “DGS1” display
set is selected, each 1-byte hexadecimal number specifies
an alphanumeric character as defined in CG ROM table of
the CDM. When the “UNT11” parameter is set to a space
character (20H), up to a full 7-digit number is displayed
followed by a 7-character label in the UNIT field on the
CDM. Otherwise, a 6-digit number is displayed followed
by an 8-character label in the UNIT field.
ALD523D
© © © © 2001 Advanced Linear Devices, Inc., 415 Tasman Drive, Sunnyvale, California 94089-1706, Tel: [phone], Fax: [phone]
Calibration
These conversion factors “±CAL1” can be
program,
Software
12/01
respectively.
User
Guide
See
for
Similarly,
http://www.aldinc.com
Scale
more
The
“UNT2” and “UNT3” parameters can be set up and
displayed on the CDM when “DGS2” and “DGS3” display
sets are selected.
SELECTING AND CONFIGURING DECIMAL
POINT PLACEMENT OR ZERO OFFSET
In mode-A and mode-C operations, the DEC1 and DEC2
switches correspond to the input pins 21 and 23 of the
ALD523D, respectively. They are functionally grouped
into J2. In either mode-A or mode-C operation, DEC1 and
DEC2 switches are jumper hardware switches used to
specify the location of placement of the decimal point of
the displayed reading. DEC1 and DEC2 switch setting
combinations are described in Table 4.
DEC1 and DEC2 hardware jumper switches are only
functional when display set “DGS0” is selected.
When DEC1=0 and DEC2=0, ALD523D instructs the
display to display the entire number without a decimal
point.
When DEC1=1 and DEC2=0, ALD523D displays the
number with a decimal point placed after the first digit.
When DEC1=0 and DEC2=1, the ALD523D utilizes this
information to display the number with a decimal point
placed after the second digit.
When DEC1=1 and DEC2=1, the ALD523D sets the
display to display the number with a decimal point placed
after the third digit.
This function effectively allows scaling of the displayed
reading. For example, the reading may display 123.456
Volt in one range and 0.123456 KiloVolt in another
display set of the same range.
Decimal placement is also programmed by software
parameters “L1DEC”, “L2DEC”, “L3DEC” which are
selected as part of display set selections.
GROUP
FUNCTION
PIN
SWITCHES
LOGIC LEVEL
Table 4. Decimal Point setting switch combination for
mode-A and mode-C
DECIMAL POINT PLACEMENT SETTING
DEC1
21
0
1
0
1
DEC2
23
0
0
1
1
.
J2
DECIMAL POINT
PLACEMENT
X . XXXXXX
XX . XXXXX
XXX . XXXX
XXXXXXX
“L1DEC”,
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