... colorimeter cover.Press the POWER key to turn the meter on.3. Place the blank in the cell holder ... conditions:0 to 40°C,0 to 90% relative humidity (noncondensing)Life of battery:1×9V,more than ... MethodOperating conditions:0 to 40°C,0 to 90% relative humidity (noncondensing)Life of battery:1×9V,more than ... conditions:0 to 40°C,0 to 90% relative humidity (noncondensing)Life of battery:1×9V,more than ...