Real-time gas analysis enhances efficiency, safety, throughput, product quality, and ensures environmental compliance. Gas analysis can utilize various technologies such as tunable diode laser spectroscopy, zirconia oxygen analysis, infrared gas analysis, stack gas analysis, dust monitoring, process gas chromatography, continuous emissions monitoring systems (CEMS), hydrogen purity analysis and gas density systems. Selecting the correct technology is critical to measurement accuracy, reliability, and durability.
Yokogawa's years of application expertise enables you to save time, money, and resources by collaboratively selecting the optimal gas analyzer solution.
Tunable Diode Laser Spectrometers (TDLS) are laser-based gas analyzers which provide a fast-update optical analysis.
Process gas chromatographs are used for separating and analyzing chemical compounds in the gas phase of on-line industrial processes.
Oxygen analyzers provide valuable measurements in combustion control, process quality, safety and environmental applications.
Gas density analyzers and detectors provide continuous measurement of gas density as well as several other valuable parameters, including specific gravity and percent concentration.
NDIR analyzers allow for high sensitivity measurement of a variety of gas components including CO2, CO, CH4, NO, and SO2. Additionally an O2 measurement can be made with a built-in paramagnetic analyzer or external zirconia analyzer.
The Yokogawa Advanced Reflux Sampler is designed to provide conditioning for severe service analysis needs using a simple self contained two stage system. The first stage is designed to provide filtration of particulate and passive cooling.
Marcus Trygstad, Yokogawa Corporation of America, outlines the advantages of EUVF technology for total reduced sulfur measurement in flare gas.
Refinery MACT regulations require flares to operate at 98% combustion efficiency by January 30, 2019. Here’s how to select the right analyzer meet these demands.
Yokogawa has been making Zirconia Oxygen Analyzers for over 30 years. The older O2 probes and analyzers used a transistor temperature sensor. The newer units use a PT1000 RTD. We discontinued the ZO21D probe and both the AV8G and ZA8C analyzers over 15 years ago. To make it easier for our customers who still had the older ZA8C and AV8G analyzers we added an option to allow them to order the ZR22G probes with the old style sensors already installed. Some customers are still ordering ZR22 Probes with the /ZR or /AV option (see the photo to the right). In many cases they are actually using them on AV550s or ZR402Gs but they have the analyzers set to “ZO21D” mode so that they will work with the old cold junction sensors. They were purchasing probes with the old sensor because they still had some ZA8C Analyzers or AV8G Analyzers in operation along with some of the newer ZR402s and AV550s.
Now the old style Cold Junction sensors are no longer manufactured, and we have not been able to locate another supplier.
These customers need to replace any ZA8Cs or AV8Gs they still have with ZR402s or AV550s.
The new Cold Junction sensor is a PT1000 RTD. It is available as a spare part. The part number is K9470BG - Cold Junction (RTD) for ZR22.
We have a limited stock of the ZO21D style cold junction sensors. The part number is E7042AU-J1, and the list price is $250.00. We will continued to sell them but they will be gone in a short time. The few customers that still have ZA8Cs or AV8Gs can purchase the parts but they need to plan to change to the ZR402 or AV550.
Identifying the Cold Junction Sensors
The Cold Junction sensor may be a PT1000 RTD or a Transistor Cold Junction sensor.
There are two styles of RTD that have been used. Both are PT1000:
The newer units have a PT1000 sensor with a Red & Black wire
The older units have a PT1000 sensor with a Red & White wire.
The Transistor sensor is mounted on a small metal bracket with 2 wires connected to one terminal and 1 wire connected to the other one.
For the ZR402G or AV550 with a PT1000 sensor set the Detector Setting to ZR22G.
For the ZR402G or AV550 with a Transistor sensor set the Detector Setting to ZO21C.
Use a 500Vdc Insulation Meter Checks (Aka: Megger). Be sure there are no wires attached to probe before doing this test.
If your analyzer has been up and running properly but when you try to calibrate you receive an "alm 10" code, then clean the detector and try again.
See the below for cleaning instructions
You can use the password JAVAJAVA to get past the password screen. Make sure you go to the password menu change the password setting.
The AV550 automatically turns off the power to the channel card when it is removed. You have to either cycle power to the whole unit, or use the channel card power.
To get to the channel card power menu hit the Setup Key (wrench). See below:
Select Channel card power
Select the desired channel and enable.
You can use code 58 to reset a single AV8C channel.
First scroll the display to the channel you would like to cycle, then enter code 58.
Here's a link to download the AV8G Manual.
The part number you see on the channel card circuit board is not the part number for the channel card. It is the part number for the circuit board before any parts are installed.
There are 2 versions on the channel card.
If you look at your channel card you will see there are either 1 or 2 blue "boxes" on it.
If you see 1 Blue box your channel card has common Isolation - the part number is AV55M-A1
If you see 2 Blue boxes your channel card has individual isolation - the part number is AV55M-B1
The password to access the maintenance and commissioning area is 77
Yokogawa’s new TDLS8000 houses all of the industry’s leading features in one robust device. The platform design is for in situ measurements which negate the need for sample extraction and conditioning. The non-contacting sensor allows for a variety of process types including corrosive, abrasive and condensing. The first generation platform has been proven in many others for the measurements of O2, CO, CH4, NH3, H2O and many more NIR absorbing gases. This second generation platform has improved reliability and ease of installation and maintenance while still meeting or exceeding designed application demands.
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