Measure The Gelex Stray Light Standard - Hach 2100AN User Manual

Measure the Gelex stray light standard

Measure the Gelex stray light standard when the instrument is first received. Record the value on the Gelex vial with a permanent marker one time.
1. Clean the stray light 2. Apply a small bead
standard with a soft, of silicone oil from the
lint-free cloth to remove top to the bottom of the
water spots and vial.
fingerprints.
7. Push RATIO to turn 8. Put the stray light
Ratio mode on. standard in the sample
cell holder with the
triangle on the vial
aligned with the
reference mark on the
sample cell holder.
Close the cover.
16 English
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.
9. Read the value 10. Record the value
when stable. Remove on the white diamond
the vial from the space on the vial using
instrument. a permanent marker.
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.