4-10
6517B-900-01 Rev. A / Jun 2008
Section 4: Measurement Options
Model 6517B Electrometer User’s Manual
Configuring rel
To check or change a rel value for a measurement function, perform the following steps:
1.
Select the desired measurement function.
2.
Press
the
CONFIG
key and then the
REL
key to display the present rel value.
3.
Use the cursor keys
(
and
)
and the
RANGE
keys (
and
)
to change the rel value
and press
ENTER
. The instrument will return to the normal display state with rel enabled.
Zero check
With zero check enabled (“ZeroCheck” displayed), the input signal is routed to low through a high
impedance shunt. For volts, amps, and ohms measurements, zero check should be enabled when
connecting or disconnecting input signals. For charge measurements, zero check should be
disabled. If left enabled, the charge will dissipate through the 10M
Ω
shunt.
The Z-CHK key is used to enable and disable zero check. To ensure proper operation, always
enable zero check before changing functions (V, I, R, or Q).
Zero correct
The Z-CHK and REL keys work together to cancel (zero correct) any internal offsets that might
upset accuracy for voltage and current measurements.
Perform the following steps to zero correct the volts or amps function:
1.
Select
the
V
or
I
function.
2.
Enable Zero Check.
3.
Select the range that will be used for the measurement, or select the lowest range.
4.
Press
REL
to zero correct the instrument. The REL indicator turns on and the “ZCor”
message is displayed. For the volts function, the “ZCor” message will not be displayed if
guard was already enabled (“Grd” displayed).
5.
Press
Z-CHK
to disable zero check.
6.
Readings can now be taken in the normal manner. The instrument will remain zeroed even
if the instrument is upranged. If downranged, re-zero the instrument.
7.
To disable zero correct, first enable zero check and then press
REL
.
Triggering
The following overview is intended to acquaint you with triggering. For a complete explanation, see
the Model 6517B Reference Manual. Triggering is configured from the Trigger Configuration menu
which is accessed by pressing
CONFIG
and then
TRIG
.
There are two trigger modes for the Model 6517B; basic and advanced. These two trigger modes
are summarized by the simplified trigger models shown in
and
. As shown in
the drawings, the basic trigger model uses one layer of operation, while the advanced trigger
model uses three layers to provide more trigger options.
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Содержание 6517B
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