Ohaus RUBY JEWELRY SCALES Manual multi - Manual (Page 4)

EN-3 Compact Series Scales
3. OPERATION
3.1 Two Button Keypad
• On/Off Zero: Pressing this button turns on the scale. This same button
operates the zero feature when the scale is on. Press and hold this button for
three seconds to turn the scale off.
• Unit Cal: Press this button briefly to change the weighing unit. Press and
hold this button to begin the calibration process.
3.2 Calibration
For best results calibrate the scale at regular intervals. This is especially important if
the scale is in use for prolonged periods.
Calibration weights are not provided with the scale
• Press and hold the Unit Cal button to start the
calibration process. The display will show CAL.
• The calibration process can be aborted by turning the
scale off.
• Press the On/Off Zero button to capture 0. The
display shows –C– while the scale stores the zero
load signal.
• The display will show C xxx where xxx is the
calibration weight in grams.
• Place the appropriate calibration weight on the
platform.
• Press the On/Off Zero button.
• The display shows –C– while the scale stores the
calibration point signal.
• After calibration, the display returns to the normal
weighing mode.
The message CAL E will appear if the calibration steps are not
followed or the wrong weight was used.