DayTronic 3500 Series, Instruction Manual

Page: 82 / 122

placed in "LIN" calibration mode. Note too that these linearization commands do
not apply to the
Model 3510 Thermocouple Conditioner .
LINEARIZER RESET (LNR): LNR [CMT]
An "IMPERATIVE" command that resets the internal linearization table. For the
effects of resetting the table, see Section 4.c.4(a), above. NOTE: Applying this
command will automatically set the active calibration mode to "MXB" (see
above).
LINEARIZATION SEGMENTS (LNS): LNS [CMT]
Reads the number of currently active linearization segments. Resetting the
linearization table sets the "LNS" number to zero— even though the definition
of each segment (now "inactive") that existed when the table was reset
remains in storage and can be retrieved by the "READ" form of the
LIN-
EARIZE (LIN) command, below, until overwritten by subsequent linearization
entries.*
LINEARIZE (LIN): LIN=n,i,o [CMT]
Sets the effective endpoint of linearization Segment No. n, where "i" is the
INPUT value in millivolts, and "o" is the desired OUTPUT in desired engineer-
ing units. Replaces the INPUT/OUTPUT data currently in the linearization
table for Segment No. n with the specified "i" and "o" values.
NOTE: The "READ" form of the LINEARIZE (LIN) command requires that you
specify the segment in question, which need not be an "active" segment (see
the
LNS command, above):
LINn [CMT]
where 0
≤
n
≤
15. This command will return the current INPUT/OUTPUT data
for Segment No. n in the format i, o [EOT] .
LINEARIZATION FORCE (LFC): LFC=v [CMT]
Sets to "v" the OUTPUT value for the linearization segment corresponding to
the existing "live" INPUT (i.e., "forces" the existing input to read "v"). FOR
ERROR MESSAGES THAT CAN OCCUR WITH REGARD TO THE
LFC COM-
MAND, SEE APPENDIX C. The "READ" form of the LFC command will not be
recognized.
4.d.4 “C
ALCULATED
” C
ALIBRATION
IMPORTANT: THE BEE, EMM, FRQ, AND MVV COMMANDS SHOULD ONLY BE
APPLIED WHEN THE 3500 INSTRUMENT IS SET FOR "TWO-POINT" OR "CALCU-
LATED" CALIBRATION—THAT IS, WHEN THE
CAL=MXB [CMT] COMMAND IS IN
EFFECT. IF ENTERED WHEN CAL=LIN [CMT] , UNPREDICTABLE READINGS
COULD OCCUR.
ZERO OFFSET (BEE): BEE=b [CMT]
Sets to "b" the ZERO OFFSET ("b" term) that is to be used whenever "MXB"
calibration is in effect (full range is ±32700).
4.20
4
S
ETUP
: I
NSTRUMENT
C
ALIBRATION
4.d C
ALIBRATING
T
HROUGH THE
RS-485 I
NTERFACE
* Asking LNS [CMT] when the active calibration mode is "MXB" will tell you how many segments
are in the last-entered (now inactive) linearization table.