Manual

ManualsBrandsYokogawa ManualsAir equipmentLow Concentration (ppm) Zirconia Oxygen Analyzer OX400

<4.PipingandWiring>

4-1

IM 11M10B01-01E

4. PipingandWiring

4.1 Piping

Be sure to observe the following precautions when connecting the gas pipe to the OX400.

1) TheconnectionsforboththegasinletandoutletareRc1/4or1/4NPT.Usethespeciedthread

and securely connect the gas pipe so that no leakage will occur.

WARNING

Whenscrewinginthepipe,besuretoholdtheinlethexagonalpartinplacewithawrenchorthelike.

Not doing so and using a strong force when screwing in the pipe may cause the thread on the OX400

to rotate, resulting in damage to the internal pipe.

2) With respect to piping, use a metal pipe. Use of materials such as plastic, vinyl, rubber, and

thelikemayresultininaccuratemeasurementsduetothetransmissionofoxygenfromtheair

and absorption onto the inside surface of the pipe. Particularly with respect to silicon tube, be

carefulbecauseduetoitslargeoxygentransmissionrate,accuratemeasurementscannotbe

performed in the low concentration range.

3) Be careful of leakage from the pipe because it may cause measurement errors. Particularly in

the low concentration range, take great care because even though the pressure inside the pipe

ispositive,oxygenmayowfromtheairduetodiffusion,resultinginalargeerror.

4) Fluctuations of back pressure at the pipe outlet may cause measurement errors, so always keep

the pressure at the atmosphere pressure level as much as possible during operation.

Flow meter

Suction pump

Heater

Oxygen

sensor

OUT

Oxygen

sensor

With aspirator (Sampling method [-A])

Built-in pump (Sampling method [-P])

Filter1

Filter2

Restriction

Filter1

Filter2

Aspirator

Sample gas

Pipe connection

Rc1/4 or

1/4NPT

Air or N

supply gas

inlet Φ6 connector

Φ8 connector

(Operable from

the front panel)

Note: If no suction device [-N] is specified, the aspirator is removed from this diagram.

Refer to sec. 6.4 when using aspirator.