3KP64 - B.1
3000PLUS WITH 5D64 INSTRUCTION MANUAL V. SB.2
Daytronic Corporation
2211 Arbor Blvd. Dayton, OH 45439 • (800) 668-4745
Tel: (937) 293-2566 • Fax: (937) 293-2586 • www.daytronic.com
A range value with respect to transducer electrical units
(R
e
) is first calculated:
• if the 5D64 is in
VOLTAGE calibration mode,
R
e
= CAL3
• if the 5D64 is in
TRANSDUCER @ VOLTS, FULL
SCALE
calibration mode,
R
e
= (CAL3/CAL1) • CAL2
• if the 5D64 is in
TRANSDUCER @ VOLTS/UNIT
calibration mode,
R
e
= CAL3 • CAL2
where in each case the allowed limits of R
e
(for the
Model 5D64) are 0.05 to 239.985 (VDC).* For an expla-
nation of the “CAL1,” “CAL2,” “CAL3,” “CAL4,” and
“CAL5” values, see Section 4.E.
Using the calculated R
e
as a “practical range” value, an
appropriate
nominal full-scale input RANGE (RNG) set-
ting is determined by means of the following table**:
Table 2
“Practical” 5D64
Range (RNG) Settings
“Practical” Range To Corresponding
Range (VDC) Select (VDC) “RNG” Setting
0.0500 - 0.0779 0.05 0
0.0780 - 0.1039 0.075 1
0.1040 - 0.1559 0.1 2
0.1560 - 0.2079 0.15 3
0.2080 - 0.3119 0.2 4
0.3120 - 0.4159 0.3 5
0.4160 - 0.5199 0.4 6
0.5200 - 0.7799 0.5 7
0.7800 - 1.0399 0.75 8
1.0400 - 1.5599 1 9
1.5600 - 2.0799 1.5 A
2.0800 - 3.1199 2 B
3.1200 - 4.1599 3 C
(cont’d)
4.1600 - 5.1999 4 D
5.2000 - 7.7999 5 E
7.8000 - 10.3999 7.5 F
10.4000 - 15.5999 10 G
15.6000 - 20.7999 15 H
20.8000 - 31.1999 20 I
31.2000 - 41.5999 30 J
41.6000 - 51.9999 40 K
52.0000 - 77.9999 50 L
78.0000 - 103.9999 75 M
104.0000 - 155.9999 100 N
156.0000 - 239.9850 150 O
The
MSF gain factor is then calculated by
MSF = R
e
/RNG
where RNG is the VDC value corresponding to the
module’s current
RANGE (RNG) setting (as given in
Table 2). To be accepted by the 5D64 module, the
MSF value must be expressed in the format of 1.XXXX;
it cannot be less than 1.0000 or greater than 1.5999.
If the
CAL4 value has been entered in engineering
units
, the MIO offset term (as a percentage of the
selected full-scale input range) is calculated by
MIO = (CAL4/CAL3)MSF • 100
If CAL4 has been entered in millivolts, MIO is
MIO = (CAL4/5000)MSF • 100
The
MIO value must be expressed in the format of
XX.XX (%), with or without minus sign; its absolute
value cannot be greater than 20 (since the offset can-
not be greater than 20% of the selected full-scale input
range).
The
SYM adjustment factor is calculated by
SYM = ((CAL5/NCAL3) - 1) • (-1) • 100
where “NCAL3” = CAL3 • (-1). The
SYM value must be
expressed in the format of
X.XX (%), with or without
minus sign; its absolute value cannot be greater than 2.
The 5D64 is then calibrated “absolutely” upon receipt of
the appropriate
RANGE (RNG), MODULE SCALE
FACTOR (MSF)
, MODULE INPUT OFFSET (MIO), and
NEGATIVE SYMMETRY (SYM) setup commands (for
command syntax, see Appendix A).
APPENDIX B: ABSOLUTE CALCULATIONS
5D64 ABSOLUTE
CALIBRATION CALCULATIONS
* These limits are defined for the product (MSF•RNG), which
must lie between the low limit of “0.05” (= 1.0000 x 0.05, for the
lowest
RNG of 0.05 VDC) and the high limit of “239.985” (=
1.5999 x 150, for the highest
RNG of 150 VDC).
** This table takes into account the effective 4% overlap that has
been built into the 5D64 scaling structure. As can be seen from
the table, if the actual full-scale range lies
close to a given nomi-
nal range value
, it is most “practical” to select the range just
below that nominal value. For example, if your actual transduc-
er full-scale range is 10 VDC, it is most practical to select a
nominal range of
7.5 VDC (and NOT 10 VDC), since 10 lies
within the “practical” range of “7.8000 - 10.3999.”
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