Lake Shore 370 User Manual
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Lake Shore Model 370 AC Resistance Bridge User’s Manual6.2.7.2 Program OperationOnce the example program is running, try the following commands and observe the response of the instrument. Inputfrom the user is shown in bold and terminators are added by the program. The word [term] indicates the requiredterminators included with the response.ENTER COMMAND? *IDN? Identification query. Instrument will return a string identifying itself.RESPONSE: LSCI,MODEL370,123456,02152001[term]ENTER COMMAND? RDGR? 1 Ohm reading query. Instrument will return a string with the presentresistance reading from channel 1.RESPONSE: +273.150E+00[term]ENTER COMMAND? HTRRNG 0 Heater range command. Instrument will turn off the heater. Noresponse will be sent.ENTER COMMAND? HTRRNG? Heater range query. Instrument will return a string with the presentheater range setting.RESPONSE: 0[term]ENTER COMMAND? HTRRNG 1;HTRRNG? Heater range command followed by a query. Instrument will change toheater Low setting then return a stringRESPONSE: 1[term] with the present setting.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 andqueries are ignored. Commands and queries 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 aquery. A leading “+” is not required but a leading “–” is required.6.2.8 TroubleshootingNew Installation1. Check instrument Baud rate.2. Make sure transmit (TD) signal line from the instrument is routed to receive (RD) on the computer and vice versa.(Use a null modem adapter if not).3. Always send terminators.4. Send entire message string at one time including terminators. (Many terminal emulation programs do not.)5. Send only one simple command at a time until communication is established.6. Be sure to spell commands correctly and use proper syntax.Old Installation No Longer Working7. Power instrument off then on again to see if it is a soft failure.8. Power computer off then on again to see if communication port is locked up.9. Verify that Baud rate has not been changed on the instrument during a memory reset.10. Check all cable connections.Intermittent Lockups11. Check cable connections and length.12. Increase delay between all commands to 100 ms to make sure instrument is not being over loaded.Remote Operation 6-17 |
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