PAGE 8
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Programming the 683A1
Digital Scaling
The 683A1 meter may be rescaled without applying an external signal by changing the Offset and Scale factor.
Offset is the reading that the meter will display for a 0mV input. The Offset may be set to any value from
–
1999 to
+9999. The default value of the Offset is 0000.
Scale Factor is the gain of the meter. The displayed reading is directly proportional to the Scale Factor. The
default value of the Scale Factor is 1000 for a 1ips accelerometer, but it may be set to any value between
–
1999
and +9999.
For an input of 2.000V a calibrated meter will read 1000 with the default Scale Factor of 1000, 2000 with a Scale
Factor of 2000, and 500 with a Scale Factor of 500.
Digital Scaling Procedure
STEP A Enter the Calibration Mode
1) Press the
and the
buttons at the same time.
Display toggles between [cAL] and [oFF].
2) Press the
or
button.
Display changes from [oFF] to [on].
3) Press the
button. Display toggles between [cAL] and [out].
STEP B Select Between Calibration of Input or Output
Note: If the analog output option is not present, Step B is skipped and the
program goes directly from Step A to Step C.
1) Press the
or
button to select the display toggling from
[cAL] to [iP].
2) Press the
button. Display toggles between [oFFS] and the
previous offset setting.
STEP C Set the Offset on the Digital Display
1) Using the
and
buttons, adjust the digital display to the
desired offset. This is the reading the meter will display for a
0mV input.
2) Press the
button. Display toggles between [SCAL] and the
previous scale factor.
STEP D Set the Scale factor on the Digital Display
1) Using the
and
buttons, adjust the meter display to the
desired Scale Factor. The default value is 1000, for which a
2.000V input will read 1000. If the Scale factor is changed the
display will change proportionally. Therefore if the Scale
Factor is changed to 2000 then for the same 2.000V input the
display will read 2000.
2) Press the
button.
The Digital Calibration Procedure Mode is Now Complete.
The menu branches to the DECIMAL POINT AND BRIGHTNESS
SELECTION, (see page 10) and the display flashes [dP] and the previous
decimal point selection.
