YOKOGAWA OX400, User Manual

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IM 11M10B01-01E
<INTRODUCTION>
• Before connecting wires to the terminal block on the rear panel of the OX400, remove the
power plug from the socket in order to prevent electric shock. After finishing the wiring,
secure the removed special terminal cover with screws.
• The OX400 is a measuring instrument intended to be installed indoors, so do not install it in
a location that is exposed to direct sunlight, rain, and wind.
• 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 the gas.
• 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 step before 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 to discharge gas, use a gas line with a connector that has the largest possible
diameter in order to prevent back pressure.
• Do not use the supplied power cord with another device.
• Power cable suffix codes of “-D” can be used in Japan, because another cable doesn’t
conform to PSE marking.
n
Product Disposal
The instrument should be disposed of in accordance with local and national legislation/
regulations.
8th Edition : Jan. 10, 2019-00