horiba OCMA-500, Инструкция по эксплуатации

Страница: 54 / 141

Measurement
34
Measurement
Measurement cautions
To obtain correct measurement results, it is important to eliminate factors affecting measured
values and to keep calibration and measurement conditions as uniform as possible. Observe
the precautions below.

If the temperature of the measurement liquid or solvent is lower than the inside of the
main unit, condensation may form inside the main unit and the indicated value may be
unsteady or shift.
If the room temperature is less than 5°C, the viscosity of solvent S-316 will increase and
the indicated value may be low. In this case, raise the room temperature above 5°C, or set
[Fill Cell Time] to a longer value.

Avoid performing measurement at high temperature and high humidity. Moisture may
cause the indicated value to shift.

When the air has a high concentration of hydrocarbons, for instance in an oil refinery,
hydrocarbons may be adsorbed inside the product and affect measurement. In this type of
location, increase the [Number of Purge] value.

Be sure to wash your hands before starting work. If oil from your fingers gets on the
sample inlet on the product, the measuring utensils, or other parts, the measured value
will be affected and correct measurement will be impossible.

Perform measurement with the right cover closed. Measurement cannot be stable with
the right cover open.

Be sure to perform zero calibration before every measurement. Perform span calibration
from once a day to once a week. When you change to a new solvent lot, perform zero
calibration and span calibration before measurement using the calibration liquids
prepared from the new lot of solvent.

Be sure to perform zero calibration before performing span calibration. If zero calibration
is performed after span calibration, correct measurement will be impossible.
CAUTION
Chemical hazard (solvent S-316)
Inhalation or accidental ingestion of a large amount of solvent S-316 may be harmful.
Observe the following rules when handling:
• Ventilate the work area sufficiently.
• Wear a protective mask and protective gloves.
• Wash hands well after handling the solvent.
Chemical hazard (hydrochloric acid)
Hydrochloric acid is toxic by skin or eye exposure.
If it touches the skin, immediately rinse with water.
If it reaches the eyes, rinse immediately under a large amount of running water and get medical
attention.
When dispensing liquids into the extraction tank, limit the solvent amount to 10 mL or less and the
amount of the measurement liquid to 20 mL or less, so that the total volume of liquid does not exceed
the upper limit line (30 mL).
If the liquid exceeds the upper limit line, the liquid may leak and cause short-circuit in the internal
wiring of the product. If liquid containing hydrochloric acid leaks and comes in contact with the skin,
irritation and burning may occur.
Discard the liquid collected in the beakers before overflow.
If liquid containing hydrochloric acid overflows and comes in contact with the skin, irritation and
burning may occur.