Chapter 3 Operation
3-78
Double Range and Autorange
The double range (option switch 4) and autorange (option switch 5) switches are used to
activate the dual and autorange modes. Table 3-3 shows how each mode is activated.
For more information about the single, dual, and autorange modes, see “Operating
Modes,” earlier in this chapter.
Operating Mode Option Switch 4 Option Switch 5
Single Range Mode Off Off
Dual Range Mode On Off
Autorange Mode On On
Table 3-4. Operating Mode Truth Table
Lock
When option switch 6 is on, instrument parameters are “locked” and cannot be changed.
This prevents any erroneous entry of instrument parameters. When option switch 2 is off,
instrument parameters can be changed.
Spare
This option switch is currently not used.
Factory Set
The factory set option switch is put in the on position when the dual three point
calibration is used. Other available functions are “Sample Zero Temperature
compensation”, “Set initial S/R zero”, Execute linear adjustment”, and “Test display”.
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