Download User`s Manual

Lake Shore Model 460 Gaussmeter User’s Manual
4.1.4.5
Program Operation
Once either example program is running, try the following commands and observe the response of
the instrument. Input from the user is shown in bold and terminators are added by the program.
The word [term] indicates the required terminators included with the response.
Identification query. Instrument will return a string
identifying itself.
RESPONSE: LSCI,MODEL450,0,020303[term]
ENTER COMMAND? *IDN?
ENTER COMMAND? FIELD?
Field reading query. Instrument will return a string with
the present field reading.
RESPONSE: +12.345[term]
ENTER COMMAND? FIELDM?
Field multiplier query. Instrument will return a string with
the field units multiplier. Blank indicated gauss,
k indicates kilo gauss, etc.
RESPONSE: k[term]
ENTER COMMAND? RANGE 0
Range command. Instrument will change the field range
to the highest setting. No response will be sent.
ENTER COMMAND? RANGE?
Range query. Instrument will return a string with the
present range setting.
RESPONSE: 0[term]
The following are additional notes on using either IEEE-488 Interface program.
• If you enter a correctly spelled query without a “?,” nothing will be returned. Incorrectly spelled
commands and queries are ignored. Commands and queries and should have a space
separating the command and associated parameters.
• Leading zeros and zeros following a decimal point are not needed in a command string, but are
sent in response to a query. A leading “+” is not required but a leading “–” is required.
4.1.5
Troubleshooting
New Installation
1. Check instrument address.
2. Always send terminators.
3. Send entire message string at one time including terminators.
4. Send only one simple command at a time until communication is established.
5. Be sure to spell commands correctly and use proper syntax.
6. Attempt both 'Talk' and 'Listen' functions. If one works but not the other, the hardware connection
is working, so look at syntax, terminators, and command format.
7. If only one message is received after resetting the interface, check the “repeat addressing”
setting. It should be enabled.
Old Installation No Longer Working
1. Power instrument off then on again to see if it is a soft failure.
2. Power computer off then on again to see if the IEEE card is locked up.
3. Verify that the address has not been changed on the instrument during a memory reset.
4. Check all cable connections.
Intermittent Lockups
1. Check cable connections and length.
2. Increase delay between commands to 50 ms to make sure instrument is not being over loaded.
Remote Operation
4-13