Lake Shore Cryotronics F71, Руководство пользователя

Страница: 90 / 97

82 c
HAPTER
6: Service
F71/F41 Teslameter
6.3.3 Intermittent
Lockups 1. Check cable connections and length.
2. Increase delay between all commands to 100 ms to make sure instrument is not
being overloaded.
3. Ensure that the USB cable is not unplugged and that the teslameter is not pow-
ered down while the com port is open. The USB driver creates a com port when
the USB connection is detected, and removes the com port when the USB connec-
tion is no longer detected. Removing the com port while in use by software can
cause the software to lock up or crash.
6.4 Line Voltage The F71/F41 teslameter will operate between the range of 100 VAC to 240 VAC, 50 Hz
or 60 Hz configurations so that it can be operated from line power anywhere in the
world. No manual switches need to be configured for different voltage operations.
6.5 Error and
Status Messages The following are error and status messages that may be displayed by the teslameter
during operation.
6.6 Calibration
Procedure Instrument calibration can be obtained through Lake Shore Service. Refer to
section 6.9 for technical inquiries and contact information.
Message Description
Instrument
hardware
error messages
EEPROM read error
The instrument failed to read a connected EEPROM. If this problem is not
resolved by disconnecting and reconnecting the probe, it may indicate a
defective EEPROM.
Current source rail
The current does not have a path through the Hall sensor. The probe may
have a mechanical fault that breaks the conducting path.
Temperature
compensation rail
The current does not have a path through the temperature sensor. The probe
may have a mechanical fault that breaks the conducting path.
Measurement
messages
No probe There is no probe attached or the attached probe is damaged.
Invalid probe
The detected probe does not contain calibration information. This is more
often the case when using a Hall sensor.
Incompatible probe A previous generation probe has been attached that is not supported.
Overload
The measured field is larger than the range. Increase the measurement
range or turn autorange on. If error condition still exists, the probe may be
damaged.
SCPI command
error messages
ExecutionError
General execution error. Also occurs when attempting to execute multiple
overlapping commands that use the same pattern simultaneously.
ParameterError General parameter error.
IllegalParameter-
Value
Parameter has an invalid value, such as being out of range.
HardwareMissing Required hardware, such as a probe, is missing.
DataQuestionable
Data quality may be compromised. For example, when data is queried
during a range change.
HardwareError
Error reading probe EEPROM, Probe is not supported, or temperature com-
pensation is railing.
StorageFault No data is found on the breakout adapter.
DataOutOfRange Data queried during an overload state.
QueryError
Data queried on a channel that is disabled. AC-related values queried while
in DC mode.
SettingsConflict
Conflicting settings, such as enabling cryogenic mode while using a previous
generation probe that does not support it.
SystemError General error when attempting to parse the command/query.
TABLE 6-1 F71/F41 teslameter error messages