Yokogawa Low Concentration (ppm) Zirconia Oxygen Analyzer OX400 - Manual (Page 24)

<
3. Installation>
3-1
IM 11M10B01-01E
3. Installation
3.1 Installation Location
The OX400 is a measuring instrument intended to be installed indoors. Install and operate it in a
location that meets the following conditions in order to ensure the best performance.
(1) Location where there is no corrosive gas.
(2) Indoor location where there is no mechanical vibration.
(3) Location that is not exposed to direct sunlight and radiant heat.
(4) Location that is free of dust and dirt particles.
(5) Location with a room temperature of 0 to 40°C and no condensation.
WARNING
Never use the OX400 in an explosion hazardous area. Doing so may cause a fire, explosion, or the
like.
• The OX400 is a measuring instrument intended to be used indoors. Do not install it in a location
that is exposed to direct sunlight, wind, and rain.
• Do not use the OX400 in a location that may be subject to vibrations and impact. Doing so may
cause destruction and damage to the internal sensor.
• Do not apply a pressure of 30 kPaG or more to the gas inlet. Doing so may cause destruction of
the suction pump and damage to the sensor. Be sure to reduce the sample gas pressure to the
atmospheric pressure level before introducing it.
• Be sure to use metal piping for the gas piping; particularly when handling oxygen concentration
in 1 vol % or less. Use of piping materials such as polyethylene, vinyl, rubber, and plastic may
cause significant errors in measurements because of their large oxygen transmission and
absorption rates.
• The presence of corrosive gas components (H
2
S, SOx, HCl, NH
3
, HF, and the like) or potentially
toxic elements (Si, Sn, Cd, Te, As, P, and the like) in the sample gas may cause deterioration of
the sensor. Be sure to remove them with an activated carbon filter or the like in the previous step
of the OX400 before introducing the gas.
• The presence of combustible gas in the sample gas may cause errors in measurements
because oxygen in the sample gas will be consumed by combustion. Be sure to remove it with a
filter or the like in the previous step of introducing the sample gas into the OX400.
• Make sure the temperature of the sample gas is 50°C or less.
• Be careful because the presence of water droplets in the sample gas may cause damage to the
sensor.
• Keep the supply gas flow rate and pressure as constant as possible while introducing the gas.
• Keep the sample gas outlet open to the atmosphere during operation. If a gas line must be used
for discharge gas, use a gas line with a connector that has the largest possible diameter in order
to prevent back pressure.