7 DVM
Two DVMs
are built into the SI1287:
a
200mV fixed full-scale DVM
dedicated
to current measurement
and a variable-range
DVM
dedicated
to voltage
measurement.
The measurements taken by the DVMs can be shown
on the
display
as they occur. They can also be sent
to the
GPIB or RS423
interfaces,
and
recorded in
a history file for later review.
You can select which values
are measured and
shown
on the display
using the
arrow keys
as described
in chapter
2 section
4.3
under the heading
> >
The remote commands for
this
selection
are UR/ and UL/. Refer
to Chapter
4,
Section 6.23.
You can also select which values are to
be
measured
and sent to the GPIB,
RS423
or history
file. This is described in Chapter 3 section 10.5.
The readings
selected for display and for output may be different
if required.
Table 3.4 shows the readings which may
be
selected
for display or output and
the
symbols used to describe them in the menus:
Table 3.4 Readings Available
Symbol Parameter
CE Counter electrode
(CE)
voltage.
RE1 Reference
electrode
1
(RE1)
voltage.
RE2 Reference electrode
2
(RE2) voltage.
ARE
Total
voltage
across RE1 and RE2 (RE1-RE2).
ARE-Bi ARE with bias rejected.
I Total current flowing through the
cell.
1-Bi Total current flowing through
the cell with d.c. bias rejected.
5ARE/5I Ratio of ARE increment to I increment (resistance).
5I/5ARE Ratio of I increment to ARE
increment (conductance).
POL
Internal d.c. polarisation level (menu-set level).
Spot Total d.c. polarisation level (POL I/P
+
POL).
DVM
I/P External voltage input to internal DVM
(rear panel).
TIME
Instrument Time (no DVM measurements are made).
(blank) A blank
space
(no DVM measurements are
made).
7.1
{DIGITS}
> >
Remote command is DGL Refer to Chapter
4,
Section 6.
1
6.
This menu enables the reading precision
of the DVMs to be selected, from [3x9s]
to
[5x9sj. [4x9s.
50Hz] must be used in countries where the
mains frequency is
50Hz;
[4x9s.
60Hz] is for use with mains frequencies of 60Hz.
Precision
[3x9s] [4x9s]
[5x9s]
Reading Rate (readings/second)
16 13
2
JWS/SI1287 User
Guide /
Issue
AF
3.17
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