3KP64 - 5.1
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
The 3000PLUS (“3KP”) Configurator software lets you
send standard mnemonic commands to the connected
3000PLUS during normal run-time operation, one com-
mand at a time, while viewing the instrument’s exact
response to each command as it is sent. This feature
can be used not only to perform run-time adjustments
to the meter setup, but also to review the meter’s cur-
rent channel readings and configuration status—and to
issue run-time “imperative” commands as desired.
For use of the Configurator’s
Send Command... win-
dow, see
“Sending a Command to the 3000PLUS
Instrument”
in the Configurator ON-LINE HELP.
A “terminal emulation” program (either conventional or
customized) can also be used to issue standard
mnemonic commands to the 3000PLUS, and to receive
the meter’s responses.*
When the 3000PLUS is in receipt of a command issued
to its serial communications port, the front-panel
CM
indicator will light (see Fig. 2 and Section 1.D).
For a discussion of 3000PLUS
command and response
syntax
, plus a description of all setup, interrogation, and
imperative commands, see
Appendix A.
5. OPERATING CONSIDERATIONS
5.A SENDING A COMMAND TO THE 3000PLUS
SETTING PEAK MODE
Whenever peak capture is enabled, the 3000PLUS will
be automatically placed in one of two possible PEAK
MODES, as determined by the last-entered
PEAK
MODE (PKM)
setting:
•
PEAK—indicates that the reading of the “auxiliary”
DAC output (Channel 2) will continuously equal the
highest (i.e., most positive) value experienced by
Channel 2 since peak capture was last enabled*
•
VALLEY—indicates that the reading of Channel 2
will continuously equal the
lowest (i.e., most nega-
tive
) value experienced by Channel 2 since peak
capture was last enabled*
The active peak mode can be specified as part of the
normal 3000PLUS setup procedure—either by means
of the front-panel button menu (as explained in Section
3.B) or the Configurator software (Section 4). It can be
changed on a strictly
run-time basis by using the “PKM”
toggle button in the Configurator’s
“Live Output” win-
dow when Channel 2 is being displayed (see Fig. 11). It
may also be specified at any time by issuing one of the
following
PEAK MODE (PKM) commands to the
3000PLUS, either via the Configurator’s
Send Com-
mand... window or via a conventional or customized
“terminal emulation” program (see Section 5.A, above):
PKM = 1 [sets to “PEAK” mode]
PKM = 2 [sets to “VALLEY” mode]
ENABLING AND DISABLING PEAK CAPTURE
The 3000PLUS instrument’s peak-capture operation is
turned on and off solely by means of a logic input at the
rear
PEAK (“PEK”) screw terminal shown in Fig. 2. See
Section 2.E for an explanation of how the “PEK” logic
input can be connected for the enabling/disabling of
peak capture, either by switch closure (no external sup-
ply required) or by active TTL logic.
The capture and hold of a typical input maximum is
illustrated in Fig. 16 below. Here, a peak mode of
“PEAK” (= positive peak capture) was established for
the 3000PLUS during initial setup. Until peak capture is
actually enabled at time t
1
, the “auxiliary” output (Chan-
nel 2) simply tracks the basic scaled output (Channel
1). After time t
1
, Channel 2 continuously reports the
highest signal value experienced since peak capture
last began. As long as Channel 1’s value is continuous-
ly rising—as it does after t
1
up to the first small (uncap-
tured) peak—the reading of Channel 2 still appears to
track it.
(cont’d)
5.B CAPTURING A SIGNAL PEAK
* When using a terminal program (such as Windows HyperTermi-
nal), remember that the 3000PLUS instrument’s RS232 commu-
nications interface employs a fixed protocol of 19,200 baud, 8
data bits, 1 stop bit, and No parity—with no software or hard-
ware “handshake.”
* Since the 3000PLUS instrument’s “scaled voltage” output
(Channel 3) is continuously proportional to Channel 2, it will
report “peak” and “valley” readings along with Channel 2, as
long as peak capture is enabled.
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