Stanford Research Systems SIM918, Руководство по эксплуатации и обслуживанию

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1.4 Power-On 1 – 9
1.4 Power-On
The instrument retains the following settings in non-volatile mem-
ory:
1. The power line frequency (FPLC): 60 Hz or 50 Hz.
3
2. The gain.
3. Autozero on
/
o
ff
.
4. Input selection (on, open).
5. Input shield selection (program, bias, ground.)
6. Bias selection (on, ground).
7. Bias shield selection (float, ground.)
8. Whether or not the phase-locked loop (Section 2.5) stays active
when autozero is o
ff
.
9. Calibration values.
The power-on configuration of the remote interface is detailed in
Section 3.3.1.
1.5 Restoring the Default Configuration
The default configuration of the SIM918 is:
1. Gain 10
6
V
/
A.
2. Autozero on.
3. Input connected.
4. Input shield at ground.
5. Bias at ground.
6. Bias shield at ground.
7. Reference clock direction is input.
8. The phase-locked loop (Section 2.5) is inactive when autozero
is o
ff
.
To reset the module into this configuration, turn the SIM900 Main-
frame power on while holding a front-panel button of the SIM918
for at least 2.0 seconds. The same configuration can also be reached
from the remote interface by issuing the
*RST command.
3
FPLC equals the principal rejection frequency of an internal analog-to-digital
converter used to measure the input o
ff
set trim. See the command OFST .
SIM918 Precision Current Preamplifier