Sper Scientific 300036 Lab Digital Refractometer - Clinical User Manual
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3-E. Scale Selection:
Press the SCALE button to toggle
though the scales. The ▼ symbol indicates the active scale.
3-F. High/Low Range Limit Alert
: A red light will flash
when the measurement is outside of the range limit.
Setting the High Range Limit Alert
With the unit on, press the FUNC button as needed until
H.L Y and the flashing H-Limit icon is displayed.
Press the READ button and the last digit flashes.
Use the ▼ and the ◄ buttons to set the high range limit.
Press the READ button activate the function.
Press the FUNC button as needed to return to the
measurement screen.
Deactivating the High Range Limit Alert
Press the FUNC button as needed until H.L n appears.
Press the Read button to deactivate the function.
Press the FUNC button as needed to return to the
measurement screen.
Setting the Low Range Limit Alert
With the unit on, press the FUNC button as needed until
L.L Y and the flashing L-Limit icon is displayed.
Press the READ button and the last digit flashes.
Use the ▼ and the ◄ buttons to set the low range limit.
Press the READ button activate the function.
Press the FUNC button as needed to return to the
measurement screen.
Deactivating the Low Range Limit Alert
Press the FUNC button as needed until L.L n appears.
Press the Read button to deactivate the function.
Press the FUNC button as needed to return to the
measurement screen.
3-G. Zero Checking:
Perform Zero Checking if the unit has
sustained a shock, is subjected to temperature changes, or
seems inaccurate.
Fill the prism window with a standard solution. This should
be the same temperature as the solution to be tested.
With the unit on, press the ZERO button. A refractive index
between 1.3329~1.3331 indicates that the unit is accurate.
If the unit is out of range, a flashing crosshair symbol
will be displayed, indicating that recalibration is required.
Press any button to exit this function.