Resources
 
Home > Resources > Tech Notes
Tech Notes
Use the link below to download our Beckman/Rosemount 400 or 400A lighting procedure. Here are some typical reasons for lighting failure: Not enough fuel getting to burner (clogged fuel restrictor at burner base) Glow plug is bad (or glow plug transformer has failed) Thermistor is bad (or not...
The Rosemount 400A hydrocarbon analyzer has the ability to maintain control of its sample pressure at a given value by way of three major components: An internally mounted Siemens-Moore, 0-7 psig, backpressure regulator (BPR) A sample ‘frit’ Rosemount uses frits for particulate control and to...
Your opacity analyzer normally runs fine, but then cold weather sets in and now the opacity readings are a bit flakey, spiky, noisy, weird, unusual, annoying, etc. Well, you should initially rule out the opacity analyzer … it’s not its fault! It’s probably physics! Or earth sciences! But it’s not...
Quarterly audits should be simple … thorough … but still as simple as possible. Unlike the Teledyne procedure (see below), our method is fully compliant with EPA Method 203, EPA Procedure 3, ASTM D 6216-98, and 40 CFR part 60. This is a snippet of RIGAS' procedure: [1] record the serial numbers[2]...
If asked how we would supply a sample source to a ‘pressure sensitive’ analyzer, we would tell you to control the source pressure and not throttle the source pressure/flow. We’re in the “control the source pressure” camp and not of the “throttle the source flow” camp.  The Rosemount 400, 951 NOx,...
Operation (excerpted from 400A manual): The ionization current generated by the burner is measured by an electrometer preamplifier located adjacent to the burner assembly. This small current is amplified and transformed into a signal voltage that is then further amplified by a post amplifier before...
RIGAS can save you money on desiccant cartidges by regenerating your saturated cartridge for half the cost of a new cartridge.  Although not all cartridges can be serviced, the popular 1647727 from Parker can.  This part number is used often in hydrogen generators for FIDS.  Send us your used...
We spent a few hours trying to route signals through the backplane (motherboard) so now we have a marked up copy. We don’t have it digitized yet, so just call us and we’ll send you what we have. Other 316RA schematics (available at Teledyne’s website):* A-25686* A-33140* B-9051* B-29602* B-32152* B...
These coolers/chillers are probably hard to come by … and if you do find one, it is most likely VERY EXPENSIVE. We can fix these. The usual failure mode is that your 951A (LoTempCo version) or 951C starts misbehaving and it seems to misbehave based on room temperature. It could also be impossible...
We plan to write an article about this soon, but in the interim, here are a few bullet points: * this is also referred to as Method 9 (found in 40 CFR part 60)* there are many, many criterium required to perform a ‘legal’ visual observation– time of day– relative humidity– temperature– wind...
What a great little machine this is! The Rosemount 400A is a workhorse! Its only downfall is the same as any other THC analyzer … contamination. Call us for parts or service. Typical failures are: Clogged restrictors (makes it hard to light and/or easy to flame-out) Clogged sample capillary (range...
You’re not the first to complain about this! There is a way to “desensitize” both the zero and span pots. It’s usually the span pot that gives you the heartburn; when you just breathe on the pot and your reading changes a 1/2 percent … that’s when you should call us!
There are only two significant things to consider when installing LCW#1 in the OPM2000, OPM2000A, OPM2000R, or OPM2001: [1] over-tightening and [2] stand-offs. When attaching the LCW to the transceiver’s mounting block, don’t over-torque or over-tighten the four (4) hold down screws. We always...
Affected components: 620428 Rosemount 400A Main Electronics Board (schematic 620429) 620433 Rosemount 400A Isolated 4-20 maDC board (schematic 620434) … (item is now obsolete by OEM … replaced by RIGAS 25C0007R0) Situation: The analyzer appears to operate normally (mostly anyway). U13 seems to get...
Background: The 105% indication and reading is Rosemount’s way of showing an error message; it was presumed that everyone in the opacity business would recognize that there is no such thing as 105% opacity and that it would instantly mean ‘analyzer failure’ to anyone observing it on the monitor’s...
Components affected: LCW, liquid crystal window, lamp, barrier window, alignment, bulb, & temperature. High opacity can come from any of the following: actual stack opacity conditions misalignment failing bulb/lamp or lamp power supply failing LCWs or LCW power supply dust on barrier window and...
Communication failures typically fall in to 2 categories: bad interconnecting wiring board faults If you’re not using Belden 8162 or 8163, you run the risk of causing a communications problem that gets worse with time. The CRU talks RS232 which then routes to a converter (RS232 to RS422) before the...
Communication failures typically fall in to 2 categories: bad interconnecting wiring board faults If you’re not using Belden 8162 or 8163, you run the risk of causing a communications problem that gets worse with time. The LON originates on the Stack LON board AND the IG-1 serial gateway. If either...