Hanna Instruments HI 83214 - Manual (Page 11)

11
shake gently shake vigorously
(b) shake the vial: move the vial up and down. The movement may be gentle or vigorous.
This mixing technique is indicated with “shake gently” or “shake vigorously” and one of the following icons:
Pay attention to push the cuvette completely down in the holder.
• Whenever the vial is placed into the measurement cell, it must be dry
on the outside, and completely free of fingerprints, oil or dirt. Wipe it
thoroughly with
HI 731318 or a lint-free cloth prior to insertion.
• Do not let the reacted sample stand too long after reagent is added.
For best accuracy, respect the timings described in each specific
method.
• It is possible to take multiple readings in a row, but it is recommended
to take a new zero reading for each sample and to use the same vial
for zeroing and measurement where possible (for most precise results follow the measurement procedures
carefully).
• All the reaction times reported in this manual are at 25 °C (77 °F). In general, the reaction time
should be increased for temperatures lower than 20 °C (68 °F), and decreased for temperatures higher
than 25 °C (77 °F).