3.5 Power Supply
The instrument adopts 3.7V rechargeable lithium battery. Fully charge the battery before first-time
use.
a) Charging mode
·Charge via Power adaptor: connect instrument and power adaptor with a USB cable. Adaptor
specification: AC110 to 240V, 50/60Hz, output: 5V/1A.
·Charge via Computer: connect instrument and a computer with a USB cable.
Under normal circumstances, it is recommended to use the power adapter to charge the lithium
battery to ensure the performance. When the lithiumbattery voltage is lower than 3V, the instrument
will shut down, and it’s time to recharge it.
b) Battery capacity indication
·Battery capacity icon: , please recharge the battery when
icon displays to ensure measuring accuracy; when icon displays, the battery must be
recharged, otherwise the instrument cannot work properly.
·If charging the instrument when it is turned on, icon will be displayed. Users can continue
using the instrument while it is being charged.
·If charging the instrument when it is turned off, "Charging......" will be displayed, and "Charging
is completed" will be displayed after a full charge.
4METER CALIBRATION
4.1Preparation for Calibration
a) Calibration Point
The instrument has 5 calibration points: 0 NTU, 20 NTU, 100 NTU, 400 NTU, and 800 NTU. Among
them, 0 NTU point uses AMCO 0.0 NTU calibration solution or laboratory distilled water, and the
remaining 4 calibration points use AMCO polymer solutions. Note that the cap of the 0.0 NTU solution
cuvette can be unscrewed. After the solution is invalidated, users can replace the 0.0 NTU calibration
solution or use fresh laboratory distilled water. The AMCO 0.0 NTU calibration solution refill can be
purchased from the supplier; For the remaining 4 calibration solutions, their cuvette caps cannot be
opened. Simply dispose the solutions after they are expired or invalidated and buy new ones from
your supplier to replace. See the detail in Section 8 Replacement Parts.
b) Replace zero turbidity solution
•Open the 0.0 NTU cuvette cap, pour out the original solution, add 1/2 distilled water, screw on
the cap and shake the cuvette to rinse it off and pour out the water. Repeat it 3 times. Shake off
the distilled water in the cuvette. Pour in new AMCO 0.0 NTU calibration solution or fresh
laboratory distilled water. Then close the cuvette cap.
•AMCO 0.0 NTU calibration solution has 6 to 12 months of shelf-life, distilled water is only valid for
a couple of days.
