44
upper display. Press the FUNC key and the upper display should show
OFF
while the lower display
shows
SHUNT
. If the upper display does not show
OFF
, press the ▼ or ▲ key until the upper display
changes to
OFF
. Press the FUNC key to set the value and press RESET to return to the operating
screen.
Press the FUNC key until
nonE
and
GROUP
show on the display. Press the ▲ key until
2
shows in
the upper display. Press the FUNC key and the lower display changes to
ZERO.C
. The upper display
shows
OFF
. With the input at the low scale value, press the ▼ or ▲ keys until the upper display
changes to
ON
. Press the FUNC key to calibrate the zero value. When the lower display changes to
SPAN.C
, zero calibration is complete. Press the ▼ or ▲ keys until the upper display changes to
CLEAr
. Press the FUNC key to restore the linear factory calibration of the span value. When the
legend
DSP.FL
appears in the lower display, calibration is complete. Press RESET to return to the
operating screen.
9.2 INSTRUMENT CALIBRATION
NOTE: In this section the word
Calibration
means to set the Instrument to an internationally
recognized standard, independent of input device.
9.2.1 SETTING THE INTERNAL DIP SWITCH FOR INSTRUMENT CALIBRATION
The instrument calibrations are accessible by an internal dip-switch (see below). This is done to
protect the calibration data area of the EEPROM.
NOTE: The instrument is shipped with the fitted circuits fully calibrated.
Remember to change the switch settings back to the proper input as shown in Figure 14 for board
location and switch settings.
Remove the instrument from its case by gently pulling back the tabs on either side of the display.
This can be done with the unit powered, without fear of damage.
CPU BOARD DIP SWITCH POSITIONS
Operating Mode SW1 OFF SW2 OFF
Calibration Mode SW1 ON SW2 OFF
Factory Mode SW1 OFF SW2 ON
Security Mode SW1 ON SW2 ON
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