RIGAS Industrial Gas Analyzers

Teledyne Universal Motherboard Schematic C-31945 (marked up for 316RA configuration)

RIGAS — Tue, 15 May 2012 13:13:38 +0000

I spent a few hours trying to route signals through the backplane (motherboard) so now we have a marked up copy. I 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-33129
* B-40393
* C-35087

The 316RA is a trace oxygen analyzer (polarographic; chemical cell; fuel cell). It seems well built. It has wide acceptance of industrial customers.

Rosemount 654062 or 654943, Chiller Housing (Thermocooler for PMT (photomultiplier tube))

RIGAS — Thu, 08 Mar 2012 22:56:00 +0000

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 to zero or maintain a good zero. What is probably happening is your PMT (655168) is no longer being maintained at 6°C and that is creating a significant ‘dark current’ in the PMT. Or equally bad is that it is close to 6°C but the temperature is not stable, so getting a good zero on the instrument is fruitless.

Another failure symptom is scorched or burned wires associated with the chiller circuit. The chiller is fed by a high current DC power supply (roughly 14 VDC); when the Peltier chips go bad, more current is required to achieve the cooling required and ultimately, there is so much current that the wire limitations are exceeded (especially when you factor in Rosemount’s use of 18awg high current wire). Look at the J16 plug and the J15 plug on the Power Supply Board. Check the terminations on the terminal strip on the side of the high current power supply too.

The cooler is built with a metal can liner that surrounds the PMT; the metal liner is thermally connected to two Peltier chips (or elements); the Peltier chips are thermally connected to the aluminum fin housing that you see when you open the instrument. These components are all potted in Stryofoam insulation.

Check the continuity of the red and black wires going to the chiller unit. New Peltier chips will read about 2 ohms in one direction and -2 ohms in the other direction (the negative reading come from the battery effect of the Peltier chips; essentially these are a million thermocouples amassed together … and thermocouples are little batteries in the presence of heat).

Our repair consists of extracting the old Peltier cells, installing new ones, repotting everything, checking the feedback thermistor, and testing the final assembly.

Call us for more information.

Billiards/pool in Fairbanks, AK (Alaska)

RIGAS — Thu, 17 Nov 2011 01:48:56 +0000

I was dismayed to find that Kaleidoscope closed a few weeks ago (circa October 2011). Finding a new place to play has been a challenge; here’s what I’ve found so far either by visiting the business or hearsay:
* Marc The Shark’s Pool Hall (a.k.a., Marc The Sharks Pool Hall), on 3rd Avenue … I haven’t been here yet. Phone: 907-347-7738 Address: 544 3rd Ave, Fairbanks, AK 99701
* Drop Inn on Cushman Ave (they have a pretty nice 9 foot, coin operated Diamond Billiards table with “ok” lighting; they have a coin-operated Bar Box too with very poor lighting)
* Gwanzhii, LLC on College Avenue has two ‘perfect’ Brunswick, 9 foot tables. Evon Peter is the proprieter. He has free WiFi. But … he’s only open two days per week. 409 College Rd, Suite #3, Fairbanks, Alaska 99701 (907) 374-5950 Open Friday & Saturday (2pm-10pm)
* Pump House restaurant, 796 Chena Pump Road Fairbanks, AK 99709 (907) 479-8452. As I recall, they have two 9 footers; according to their website (from the Senator Saloon page) these are antique Brunswick “Union League” tables made in 1898. I haven’t played on them yet, but I want to!!!
* more later

Performing VEO (visual emissions observations) … coming soon

RIGAS — Thu, 17 Nov 2011 01:29:58 +0000

I 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 direction
– sun position
– weather conditions
– status of your EPA VEO certification
– distance to emission
– angle of incidence
– background contrast used
– white smoke or black smoke
– (I’ll look up the other criteria and post it here)

Model 320 (or 320A) Stream Switcher by Beckman (or Rosemount) is NLA

RIGAS — Thu, 03 Nov 2011 19:18:20 +0000

This is an old mechanical, rotary drum & rocker switch, stream switcher. It was designed as a 5 stream or 10 stream unit.

RIGAS can fabricate a replacement. We utilize more modern parts (i.e., a PLC replaces the mechanical timers). Other options are available too, just ask.

Here are some part numbers that you might find in this unit: 138515 operator’s manual, 138520 operator’s manual, 123770 front panel, 117956 SLIDE RAIL, 117957 CHASSIS MOUNTING PLATE, 081810 manual.

OXA-1000 by Rosemount

RIGAS — Thu, 20 Oct 2011 20:38:34 +0000

This analyzer has fallen off of the proverbial radar! It its day, this was a very good analyzer. It is still in use across the country (maybe even the world). RIGAS can service this unit. The main failure problem is its ZrO2 (zirconium oxide) sensing cell. Don’t throw this unit away … please call us for a ballpark quote and/or technical support.

This analyzer was commonly referred to as “Ox in a box” (i.e., zirconium oxide based oxygen in a rack mountable chassis).

The unit was fabricated in Shannon, Ireland (a Rosemount factory back in the 70s, 80s, & early 90s).

A web link for a friend of RIGAS – CalCheck of Raleigh, NC

laryrunyan58 — Thu, 01 Sep 2011 20:08:47 +0000

If you have NDFs (neutral density filters) to be recertified, please call or email John Rosenquest at CalCheck in Raleigh, NC.

www.CalCheck.com

Rosemount 400A Hydrocarbon Analyzer

RIGAS — Mon, 29 Aug 2011 17:14:54 +0000

What a great little machine this is! The Rosemount 400A is a workhorse! Its only downfall is the same as any other THC analyzr … contamination. Call us for parts or service.

Rosemount OPM2000, 2000A, 2000R, & 2001 are NLA

RIGAS — Mon, 29 Aug 2011 14:16:42 +0000

These analyzer are discontinued by the OEM but they are still VERY viable! We have parts and service available for these continuous opacity monitoring system analyzers (a.k.a., COMS). Call us today!

Rosemount 755R (shown), 755G, 755A, & 755EX are NLA

RIGAS — Mon, 29 Aug 2011 14:11:57 +0000

Yes … NLA (no longer available). But, these analyzers are still VERY viable! The electronics are serviceable; the detectors can be replaced. Call us for for information!

Additional information: