6
2-3. Precautions
3.
CAUTION
Do not measure gases that contain interference gases.
If a measuring gas contains an interference gas (other than SF6 and air), accurate readings
cannot be obtained. Do not measure gases that contain interference gases.
Use REF. IN and end of handy aspirator under atmospheric pressure.
Use the REF. IN of purity meter and the end of handy aspirator under atmospheric pressure.
Do not use the purity meter where it is exposed to oil, chemicals, etc. Do not submerge the
purity meter under water on purpose
.
Do not use in a place where the purity meter is exposed to liquids such as oil and chemicals.
The purity meter is neither water-proof nor dust-proof.
Do not place the purity meter where water or dirt gets accumulated. The purity meter placed at
such a location may cause malfunction due to water or dirt that gets into the buzzer opening,
etc.
Note that drawing in dirty water, dust, metallic powder, etc. will significantly deteriorate the
sensor sensitivities. Be careful when the purity meter is used in an environment where these
elements exist.
Do not use the purity meter in a place where the temperature drops below -10
º
C or rises over
40
º
C.
The operating temperature of the purity meter is
-
10 to +40ºC. Do not use the purity meter at
higher temperatures, humidities and pressures or at lower temperatures than the operating
range.
Do not use the purity meter in a place where the surface of it is heated above 40ºC by radiant
heat (infrared rays emitted from a high-temperature object) or direct sunlight.
Do not store the purity meter in a sun-heated car.
Observe the operating restrictions to prevent condensation inside the purity meter or
sampling hose.
Condensation formed inside the purity meter or sampling hose causes clogging or gas
adsorption, which may disturb accurate gas measurement. Thus, condensation must be
avoided. In addition to the operating environment, carefully monitor the temperature/humidity of
the sampling point to prevent condensation inside the purity meter or sampling hose. Please
observe the operating restrictions.
Do not use a transceiver near the purity meter.
Radio wave from a transceiver near the purity meter may disturb readings. If a transceiver or
other radio wave transmitting device is used, it must be used in a place where it disturbs
nothing.
Do not use the purity meter near a device that emits strong electromagnetic waves
(high-frequency or high-voltage devices).
Never fail to perform a regular maintenance.
Never fail to perform a regular maintenance to ensure safety. Continuing to use the purity
meter without performing maintenance will result in inaccurate gas measurement.
Usage
A rapid temperature change in the operating environment makes the zero point unstable. Use
the purity meter after adjusting it to the ambient temperature sufficiently.
Others
Operate the purity meter using only the procedures described in this operating manual.
Do not drop or give shock to the purity meter. The accuracy of the purity meter may be
deteriorated.
When the AC adapter (option) is used, do not use a power supply of the same system as a
device that significantly disturbs the waveform of power supply.
To use the AC adapter (option), use the rated power supply specified for the purity meter.
