Manual

iv
IM 11M10B01-01E
<INTRODUCTION>
• When opening the cover to replace the sensor, turn off the power switch, remove the power plug
from the socket, and wait for 1.5 hours or more before opening the cover.
• 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nishing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concentra-
tion in 1 vol % or less. Use of piping materials such as polyethylene, vinyl, rubber, and plastic
maycausesignicant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lter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 be-
causeoxygeninthesamplegaswillbeconsumedbycombustion.Besuretoremoveitwitha
lter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ow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sufxcodesof“-D”canbeusedinJapan,becauseanothercabledoesn’tconform
to PSE marking.