Lake Shore 370 User Manual
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Contents
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Lake Shore Model 370 AC Resistance Bridge User’s Manual4.3.2 General Keypad OperationThe Model 370 uses three basic keypad operations, direct operation, setting selection and data entry, for the majority ofoperator interface. A few specialized keypad operations, such as curve entry, are described in the individual operationparagraphs.Direct Operation: Key functions occur immediately when the key is pressed. Resistance Range, Autorange andScanner Channel are examples of keys that operate this way.Setting Selection: Allows the user to select from a finite list of parameter values. During setting selection the V and Wkeys are used to select a parameter value. Enter is used to accept the change and advance to the next parameter. Escapewill cancel the change to that parameter and return to the normal display. Setting selection screens always include themessage: “Select with VW”.Data Entry: Allows the user to enter numeric parameter values using the data entry keys that are printed on the key tops.Data entry keys include numbers from 0 to 9, sign, and decimal point. The labels printed above the keys describe the keyfunction during normal operation. When one of the keys is pressed and a data entry sequence is started, the keys followthe data entry functions printed on the key tops. Once the correct parameter value is entered press Enter to accept thechange and advance to next parameter. Pressing Escape once will clear the new value and restart the setting sequence.Pressing Escape again will return to the normal display. Data entry screens always include the message: “Enter a valuefor”.Related setting selection and data entry sequences are often chained together under a single key. To skip over aparameter without changing its value press Enter before pressing an arrow or number key. To return to the normaldisplay in the middle of a setting sequence press Escape before pressing an arrow or number key. Changes “entered”before Escape is pressed are kept.4.4 DISPLAY SETUPThe display setup sequence for the Model 370 may seem complicated at first but the steps are necessary to provideflexibility to the operator.4.4.1 Display Setup and Units SelectionDisplay setup begins with choosing the number of reading locations on the display. One to four readings are displayedwith large characters and five through eight readings are displayed with standard characters. Reading locations areassigned the following numbers:Display LocationsLocation 1 Location 2Location 3 Location 4Location 5 Location 6Location 7 Location 8If no scanner is installed only a data source must be chosen for each reading location. Choosing units of resistance inohms or temperature in Kelvin for a live reading is part of the source selection. Units for Max/Min and linear equationare selected during setup of those features. Setting of display resolution follows in the display setup sequence ifnecessary.Data SourcesOhms Live resistance reading in ohmsKelvin Live temperature reading in Kelvin (if curve installed)Max Maximum reading capturedMin Minimum reading capturedLinear Result of linear equationIf a scanner is installed, both channel and source must be chosen for each reading location. When scanning more that8 channels, it is not possible to have a reading for all channels on the display at the same time, but one or more of thelocations can be assigned to follow the active scan channel. Channel numbers 1 to 16 to indicate the individual scannerchannels and the word “Scan” indicates that the display location should follow the active scan channel.4-4 Operation |
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