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InstaTrans - Trace and Percent Oxygen Transmitter
How do I adjust the Insta Trans to reach the calibration gas cylinder value? Example : Let's say you cannot adjust the unit to match the gas cylinder you have which is 90 ppm O2. The unit reads 97 ppm and cannot be adjusted. Factors which can affect this are: 1) It is possible there is a leak in the system or the system is overpressurized. The Insta Trans should be vented to atmosphere and should have a flow of about 1 SCFH. The reading is insensitive to flow variations as long as there is no leak. If the flow is raised to 2 SCFH and the unit reads lower in O2 as a result, in most cases this indicates a leak. 2) The cylinder itself may be misanalyzed (the supplier of the cylinder may have incorrectly measured the concentration of gas). We have adjustment ranges in our product to cover the full range of the sensors' output variation at a specific O2 level. 3) Consider the calibration gas type. We recommend for best results calibrating with O2 in a CO2 mixture if you are analyzing a CO2 mixture. The background gas should remain constant for best results. 4) Time of sensor installation. If the sensor was just installed, it can take up to a day to stabilize on gas. 5) The other possibility is a defective unit or sensor, but consider the above possibilities first. Top of page Who is the manufacturer of the connector on the Insta Trans? Turck. Our interconnection drawing is B-71625. The Mating connector is Turck part number B8141-0. Top of page What are the types and grades of the various materials that are exposed in the Insta Trans Transmitter?
Top of page What is the failure mode of the Instatrans? For other Teledyne oxygen analyzers, when the cell fails, it will go to 4 ma output. However, for the transmitter, will it go to 0 ma, or could it fail mid range? The most common form of failure of the sensor in the monitoring of Trace O2 in Pure Inert Gas Service such as N2 or Argon, is an elevation of the offset level from near zero to one to a few ppm. The sensor in the mode will continue to respond to O2 changes upscale. In petrochemical applications where there may be trace amounts of chemicals that can attack the chemistry or metals in this device, it is not so simple. The sensor can fail in a myriad of ways, high, or low, or midscale. Please contact the factory with details about your process for a clearer response. Top of page At one third of a psi above atmosphere inlet pressure, what is the flow rate through the InstaTrans unit? About 1.5 scfh. Top of page What type power supply should I use with this instrument? Can I get it from Teledyne? TAI does not sell power supplies for this product. Any 24V DC power supply that can source at least 30mA should be sufficient. Top of page Can you provide information on pressure and flow rate variation? This instrument is designed to be operated only at an inlet pressure slightly over atmospheric pressure. (These are "blow through" cells.) 
Top of page Is the Insta Trans Atex certified with the A5C? No it is not. Top of page I try to calibrate the analyzers with 87ppm O2 bal N2 and 74ppm O2 bal N2. Both of them shows 91.2ppm and 81.2ppm. There are no leakage and vent directly to atmosphere and no overpressurized. The analyzers was purge with N2 overnight and the reading before calibration are 1.2ppm. The flow is 1SCFH and when we increase to 2SCFH, it increase 0.2ppm only. The reading maintain at 81.2ppm for 6 hours and very stable. How can we calibrate it? It is appears that the sensor was calibrated after overnight installation and after N2 purging. Try the calibration procedure in section 4.2.1 of the manual (refer to Section 6 of this document, increasing & decreasing coarse & fine, it should display the required cylinder concentration). If you are still not able to calibrate it then let the analyzer run on N2 for one complete day & then calibrate. After doing that and it is still not getting calibrated then cylinder concentration may be the problem. The sensor output variation is specific at O2 concentration level when calibration is done at factory. Top of page We have InstraTrans- 252256 in our new plant & looking for a calibration procedure to Calibrate. What is the calibration procedure? Please follow the calibration procedure as per manual. (For your ready reference refer the attachment) Please note that if the analyzer is used in the sampling system then ensure that vent is free flowing & not obstructed. If any bypass path is used for fast loop in the sampling system then route this individually to safe vent (please do not use the single vent line for both analyzer vent & by-pass vent). After installation of sensor in the analyzer purge the analyzer with sample or N2 gas with sufficient time before performing span calibration. During span calibration wait for stable value on the display then perform calibration. Maintain the same flow rate during calibration & sampling. Top of page I am going to install Insta Trans (right angle: C72103B) O2 aynalyser. It uses B2C sensor. I couldn't understand the sensor montage. There are two sides of sensor (sensing surface and concentric foil contact rings surface) One surface of the cell will touch to the cell holder. My question is: which surface of the cell touches to the cell holder and which surface touches inside of the analyser? The mesh side of the sensor is the gas sensing surface and should face down. The foil contact rings should face up since these are the contacts to the analyzer. Top of page How do you determine the need to replace the micro-fuel cell in Teledyne trace oxygen analyzers? Please refer to this document: MFC_End_of_Life_Determination.doc Top of page We are about to install an Insta Trace - CO2 analyzer. This is to be used to measure trace amounts of O2 in Natural gas with typically 1% CO2. Does the calibration mixture need to have a similar amount of CO2 in it to operate correctly? The calibration gas that we have has trace amount of Nitrogen e.g 90ppm in a methane balance but with no C02 content. Generally speaking, yes we do suggest you have a similar amount of CO2 in your calibration gas as compared to your sample. We have seen in some cases strange behavior (spikes, etc) from cells switched between CO2 bearing gas and non CO2 bearing gas. The mechanicism for this is not precisely understood, and not all cells demonstrate this. Many of our customers successfully to use O2 in N2 only and get good results, however. Top of page On the Insta Trans, as there is no alarm output on the instrument, will the analog output generate an alarm in case of malfunction? This is not mentioned in the manual. How does the customer see if anything goes wrong with the device? Will it generate 22 mA at the 4-20mA output? No it will not do this. This is not a smart transmitter. It is a analog product, and has no microprocessor. Top of page The Teledyne InstaTrans 3001 oxygen analyzer data sheet and manual state that: "The Insta Trans is self-certified by Teledyne as suitable for Class I, Division 2 areas without the use of I/S barriers utilizing specific installation guidelines." As we have to install the instrument in Zone 2 which is equivalent to Class 1, Division 2, we are very interested in the specific installation guidelines mentioned. However, these cannot be found on your website. Can we access these guidelines so that we can judge whether or not this can be applicable in our application? To be suitable for installation in a Class 1, Division 2 area the device must be in normal operation without the presence of any source of ignition. Sources of ignition are typically elevated surface temperatures, and/or arcing and sparking circuits. Since the Insta Trans operates from a low voltage power supply (24V or less) and the unit is a low power device and has no possibility of arcing and or sparking in normal operation, we have advised customers that it is suitable for installation in a C1, D2 environoment. We have no particular installation guidelines other than to limit to the power supply voltage to the maximum as stipulated by the device specifications which is 30VDC. Top of page Please advise if following contaminants in a N2 stream may damage the cell of an InstaTrans: 1.5 % acetic acid, trace heptane and trace phosphoric acid. Cell will be maintained to 40 deg C (104 F) in order to prevent acetic acid deposition. Acetone is used for piping cleaning. 1. 40oC is the maximum temperature for our cell. Cell life may be short. We normally quote cell life at room temperature, which should be about 25oC. 2. If the cell is B1, B3, and B2C, L2C, this sample gas will affect our cell and significantly reduce the cell life. 3. If the cell is A5, A2C, this sample gas will not damage the cell. So, in this application, use A2C for trace and A5 for %. Top of page What is the maximum pressure the Insta Trans can support in case of pressure regulation breakdown, not considering sensor damage? We did a test using an Insta Trans and pressurized the cell holder using water. At about 200 psi, the device will start to leak water as the holding ring becomes deformed under the stress. So the most we would safely rate the device to hold based on this test is 150 psi. Top of page We currently have two Insta Trans Oxygen Analysers measuring 0-10ppm Oxygen in Ethylene. I have specificed a calibration bottle of 9ppm balance Ethylene for calibration purposes, the problem I'm having is the calibration gas bottle manufacturer cannot meet the required specification. Can we replace the current request specification with 9ppm Oxygen balance Nitrogen? Yes, it is ok to use the span gas 9ppm O2 in nitrogen background. Top of page |
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