OPERATION
2-3
ENTRY
The ENTRY display allows entry of nominal values, measurement conditions, and
calibration data. To view this display, press the [Display] key until the ENTRY LED
is on. If an out of range or incorrect value is entered, the unit will beep and display
'rAnGE Error' (range error) and not accept the value. The ENTRY display is
enabled under all conditions.
BINS
The BINS display shows the bin number that a component falls into when binning
is enabled. The display is disabled unless binning information has already been
entered. The BINS display is also disabled when the unit is in the AUTO mode.
To view the BINS display, first enter binning information and then press the
[Display] key until the BINS LED is on. See the section on binning for more
information
AVERAGE
The AVERAGE display shows the arithmetic average of two to ten
measurements. Averaging improves accuracy by cancelling out random errors
and noise. This is useful for measurements at the extreme end of a measurement
range or with low output signal levels. The number of measurements to be
averaged is set in the ENTRY display. From the ENTRY display, press the
[Average] key. The unit will display AvG in the left display and the present number
of averages in the right display. Set the desired number of averages (2 thru 10)
and press the [ENTER] ([M
Ω
,H,
µ
F]) key. Return to the desired display type using
the [Display] key. Pressing the [Average] key toggles between averaging enabled
and disabled. The AVERAGE LED indicates that averaging is enabled.
AVERAGE works for all display types, including binning. In the BINS display, the
bin number displayed is the bin number of an average of several measurements,
NOT the average bin number.
STATUS
These LEDs indicate the computer interface status. REM (remote) indicates that the unit is under remote
interface control (front panel inactive). ACT (activity) indicates the computer interface is active. ERR (error)
indicates that a command sent to the instrument contained an error.
BINNING
The NOM, +LIM and -LIM LEDs indicate which parameter is being entered while configuring the SR715/720
for binning. See the section on binning for more details.
