Measure The Gelex Secondary Turbidity Standards - Hach 2100AN User Manual

Measure the Gelex secondary turbidity standards

Measure the Gelex secondary turbidity standards each time the instrument is calibrated and record the new values on the Gelex vials with a water
soluble marker.
1. Clean the Gelex 2. Apply a small bead
vials with a soft, lint-free of silicone oil from the
cloth to remove water top to the bottom of the
spots and fingerprints. vial.
3. Use the oiling cloth 4. Push RANGE to
to apply the oil equally select automatic
to the surface of the ranging.
vial. Remove the
"AUTO" is shown below
excess oil. Make sure
the Range Mode label
that the vial is almost
on the instrument.
dry.
5. Push SIGNAL AVG 6. Push UNITS/Exit to
to turn signal averaging select the NTU
off. measurement mode.
The SIGNAL AVG light
turns off.
English 17