Sper Scientific 850007 Visible Light SD Card Logger - Manual (Page 21)

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Zero Adjustment
During light measurement, if the
display does not show a value of 0
when the sensor cover is placed on
the light sensor, zero adjustment is
needed:
1. With the sensor cover on, press
ZERO for longer than 3 seconds.
A value of 0 will appear on the
LCD.
2. Remove the sensor cover to
resume normal measurement.
Type K/J Thermometer
1. Press POWER to turn the meter
on.
2. Press and hold FUNC to cycle
through the options until “tP”
appears on the LCD. Release the
FUNC button.
3. Plug a thermocouple temperature
probe (type K or J) into the
MEASUREMENT
PROCEDURES