LaMotte Mobile WaterLink Spin Photometer - Manual (Page 5)

5
GENERAL OPERATING PROCEDURES
 METER
When a fi lled disk is placed in the chamber and the lid is closed, the meter
spins at high speed to distribute the sample to all 11 wells and to ensure that
the water empties from the center chamber. Next the meter slows to maximize
the pumping action of the stainless steel mixing beads as the reagents mix
with the sample water. Each reaction is then read at the proper time and
wavelength for that reagent system.
The Blue indicator light indicates the status of the instrument. It is located
below the thumb hole on the meter housing.
Steady blue light – after an initial blinking sequence the blue LED will remain
steady to indicate that the meter is connected to the power source and is
ready to run a test.
Blinking blue light (three blinks/second) – a test is in progress and the
disk is spinning. Do not open the lid when the disk is spinning.
Blinking blue light (one blink/second) – low battery
Care should be taken when closing the lid. Do not slam the lid. Wiring
between the lid and the body of the photometer passes through the hinge. The
meter will not run with the lid open.
 SYRINGE
A plastic 3 mL syringe (Code 1189) is used to fi ll the disks. A precision tip
on the syringe fi ts into the fi ll hole on the disk. The syringe tip should not
be removed from the syringe. Syringes should be cleaned between water
samples. Pump air in and out of the syringe a few times to clear the previous
sample or rinse the syringe with a small amount of the next water sample
before fi lling it for testing.
 DISKS
The WaterLink Spin uses a disk reagent system. The dried reagents are
packaged in single test amounts in a sealed, polystyrene disk. Stainless steel
mixing beads in the reaction chambers mix the sample water and the dried
reagents.
Chlorine/Bromine and Biguanide Disks
There are two disk series – Chlorine/Bromine and Biguanide. Each disk
includes a set of reagents for the series. Tests for all factors in the series are
performed at one time. It is not possible to isolate the well for a single factor
and perform a test for one test factor only.