Question 1

35K0104R0, NOx Detector 0-800ppm CLD 200 cc/min, Replaces Rosemount 659754 and Tyco 1021326-100-TES

cms_admin · Accepted Answer

If you've stumbled on to this FAQ, you must have a Rosemount NGA-2000 CLD analyzer to measure NOX either dry or wet (referring to the WCLD version). The detector portion of this analyzer is OEM p/n: 659754 (obsolete) and is sold by us under this part number: 35K0104R0. It is the same OEM detector and fully compatible with your NGA-2000 or uCEMS. I'd like to point out that this detector assembly is COMPLETELY repairable and should never be discarded. Here’s why:

1. If the capillary gets clogged:

• Unclog it or solder in a new one

2. If the heaters fail open:

• Replace the heaters

3. If the resettable fuse fails open:

• Replace the fuse

4. If the barrier window gets cracked/busted:

• Replace the window

5. If the temperature sensor goes bad:

• Replace it

6. If the reaction chamber leaks:

• Replace the bad seal (or both seals)

7. If a pin breaks off or a wire opens in the harness:

• Fix the harness

8. If the metal barrel rusts through (this has never happened, but there’s always a first time):

• Replace the housing

9. If the photosensor gets weak or dies completely:

• Replace the sensor

• This is the most challenging aspect as the OEM wants about $8000 for this chip; and, most of the time, it’s the barrier window that gets clouded/stained from the ozone- NO reaction; we don’t change out very many sensor chips.*

10. If the photosensor won't cool down to 1°C, it might be a bad Peltier section of the chip -or- most likely, it's a bad Darlington Pair power transistor (mounted on the aluminum divider panel).

Important: *We’ve been fixing about two of these per year for the past 20 years. Don't listen to the rumors that you can't procure a NGA-2000 CLD detector assembly, we can get them or repair them.*

Question 2

CEMS & Opacity Monitor Field Service Engineer - Experience Required Wooster, OH

cms_admin · Accepted Answer

Company Overview RIGAS (Runyan Industrial Gas Analyzers, Inc.) is a leading provider of environmental monitoring solutions, specializing in Continuous Emission Monitoring Systems (CEMS) and Continuous Opacity Monitoring Systems (COMS). With over 20 years in the industry, we are a partner to a wide range of industries including power generation, petrochemical, and manufacturing. Compensation & Benefits Job type: Full-time, hourly. Wage: $35-$45 per hour. Location Base: Wooster, OH Why should you work for us?

Your typical work week will be 3-4 days on the road and home on the weekends.
You will keep your hotel and airline points to use personally.
You will receive competitive pay and benefits.
Your family and personal time will be respected.
You will be an important member of our team.

Benefits:

Health, Dental, and Vision Insurance (75% Company paid).
Disability and life insurance.
Two weeks paid vacation.
Paid sick time.
Nine paid holidays.
Investment-matching retirement program.
SIMPLE IRA with Company match.
Company provided cell phone.
Maximum IRS mileage reimbursement (for company related travel).
Flexible schedule.
Company credit card provided for work related expenses.
Employees keep their hotel/airline reward points.

Key Responsibilities:

Perform maintenance, troubleshooting, repairs, and audits at customer sites for various process and environmental analyzers such as O2, CO, CO2, O2, NH3, NOx, and SO2 analyzers, as well as opacity monitors.
Troubleshooting and repair will include the disassembly, inspection, replacement and testing of mechanisms and circuitry for failures and defects as well as the determination of repair requirements, obtaining necessary parts, performing necessary functional/operational/compliance testing and documentation.
Perform Federal and Regional compliance audit in the form of: COMS TITLE V audits and CEMS CGAs at quarterly and annual intervals; to include any associated preventive maintenance.
Update parameters of the data acquisition system after maintenance, repairs, and/or audit activities.
Perform installation, startup, and commissioning of CEMS and COMS. Including installation inspection, initial power up testing, calibrations, and U.S. and Regional EPA testing and certifications.
Retrofit, upgrade, and/or replace existing analyzer and monitor systems to Include: sample probes, heated sample line, wiring, tubing, and hardware.
Provide technical support to customers via telephone and digital interface over the internet.
Travel primarily during weekdays. Overnight travel up to 75% is required. Occasional weekend and holiday travel may be required.
Provide support to our repair depot in Wooster, OH when not in the field.

Experience and Skills Required:

Minimum 3 years process gas analyzer, COMS, or CEMS troubleshooting and repair experience on major manufacturer equipment (Teledyne, Rosemount, Procal, Servomex).
Minimum 3 years field service experience.
Two or four year industrial electronics and/or industrial instrumentation degree or certificate, or military electronics or instrumentation schooling.
Knowledge and understanding of 40 CFR 60 and 40 CFR 75 with the ability to communicate requirements to customer personnel.
Strong troubleshooting skills demonstrated in previous jobs including 4-20 mA signal loops and DC circuits. Component level circuit board troubleshooting a plus.
Knowledgeable on gas pressure and flow.
Proficient in use of multi-meters, loop calibrators, valves, regulators, pressure sensors, flow sensors, and the application of additional electronic test equipment.
Ability to read and interpret electrical and flow schematic diagrams.

Other Requirements:

Valid driver’s license and driving history acceptable to the Company insurance carrier.
Able to pass a background check, and drug & alcohol screening, to include frequent customer required tests and random company testing.
Able and willing to climb ladders and work at heights of +200’.
Willingness to work outdoors in a variety of weather conditions.
Clear vision and ability to identify and distinguish colors.
Must be able to lift more than 50 lbs, climb stairs and ladders, kneel, crouch, stoop, and crawl.
Valid Permanent US work authorization, (not requiring sponsorship).

Question 3

List of common CLD issues

cms_admin · Accepted Answer

1. The ozone lamp will die after many years of service

• but along the way, it will begin to decrease its ozone (O₃) production and you WILL experience Ozone Starvation (see other FAQ)

• The ozone lamp power supply might live long enough to power two or three lamps

2. The Darlington Pair power transistor that controls current to the sensor chip’s Peltier cooler will fail:

• sometimes the Peltier chip pulls too much current;

• sometimes a technician will unplug and re-plug the Darlington cable and blow the transistor (I’ve done this at least once);

• sometimes due to age

3. When reassembling, technicians can cause stress on the ACU02 (the CPU / controller board that sits on top of the BPR [backpressure regulator]) by not routing the ribbon cables neatly; this will break solder connections on some very sensitive chips causing hard failures (digital faults) or the very frustrating intermittent failures. 4. The capillary will foul, causing a loss of sensitivity. 5. The heaters in the reaction chamber are covered with thermite paste; the paste will dry out over time causing poor thermal conduction. This could induce an instability in the temperature control of the "block" (the upper region of the reaction chamber); and this could induce variations in zero, span, and process readings (sample analysis). 6. [later] 7. [later]

Question 4

How does the 400A work?

cms_admin · Accepted Answer

The 400A Flame Ionization Detector (FID) THC analyzer tests for the presence and concentration of HC compounds in a continuous gaseous sample by combining the sample with a fuel gas stream, ionizing the present hydrocarbons through combustion, and then measuring proportional charge produced by the presence of the ionized hydrocarbons in the sample.

Question 5

What is THC?

cms_admin · Accepted Answer

Total Hydrocarbon (THC) is a measurement of the hydrocarbon content (aggregated, not specific to an individual HC compound) concentration in a measured sample.

Part Number	Description	Available?
632785CSS	755: Door board	Y
638254	755: Alarm relay assy
638254RU	755: Alarm relay assy
L22-BA-2.0	755: Barry Mount vibration	Y
S22-AA-2.2	755: Barry mount vibration	Y
622356RU	755: Board Assy, Photocell
622356	755: Board Assy, Photocell	Y
622351	755: Board, Connector	Y
631773	755: BOARD, POWER SUPPLY	Y
631773RU	755: BOARD, POWER SUPPLY	Y
6A00236G01	755: Cable, detector upgrade
622443CSS	755: det/mag assy	Y
622443	755: det/mag assy
656189RU	755: detector	Y
632359	755: detector strip heater	Y
6A00233G01	755: detector upgrade kit
861273	755: FAN (120V) case htr {*}	Y
861649	755: Fuse, Thermal, 76°C{*}	Y
656143	755: Kit, Detector Assy
50A0010R0	755: Kit, Source Lamp	Y
616418	755: Kit, Source Lamp{*}	Y
622422	755: MAGNET
876316	755: master board term 4 p {*}	Y
193311	755: METER WITH BLANK SCALE
632358RU	755: paramagnetic detector
632358CSS	755: Paramagnetic detector RU	Y
50A0001R0	755: plug tabs
616239	755: Source Lamp, bulb only(*)
861651	755: thermistor, 100K {*}	Y
861651RU	755: thermistor, 100K RU	Y
656189	755:DETECTOR OPTICAL BENCH KIT
7289A32	755A: Allen Wrench, 0.9mm Hex	Y
95966A414	755A: Panel screw
50D0002R4	755A: Pressure comp interface
899495	755A: AD625, pressure comp {*}	Y
7122A12	755A: Allen Wrench 0.035 inch	Y
861467	755A: anti-vibration mounts{*}
661121	755A: baro interface bd{*}
661207	755A: barometric comp bracket
50D0003R1	755A: bracket, baro module
50B0001R0	755A: CABLE ASSY
632380	755A: CABLE ASSY {*}
50D0005R0	755A: det heater interface bd
622637RU	755A: detector kit
LCD5663R-27K	755A: LCD display, 6 seg
888302	755A: LCD display, 6 seg {*}
898365	755A: LCD driver chip {*}
50D0004R0	755A: M&C detector bracket
50D0002R0	755A: pressure comp interface
50D0002R3	755A: pressure comp interface
901068	755A: ribbon wire 4C {L}	Y
882297	755A: U1 isolation driver {*}
901792	755R/951C: Backlight for LCD	Y
652830	755R: Board Assy, Control
654022	755R: Display Assy (951C too)	Y
654080	755R: Fan Assy, Case Heater{*}	Y
901791	755R: LCD display, 6 seg	Y

Part Number	Description
25B0001R0	400: Power supply cover
25B0002R0	400: Temperature Controller
400A-2008-0001	400A, 120 VAC on alarm bus
898816	400A: range relay {*}
623983	400A: Range Select Board
9385K61	400A: Foam Insulation
25C0008R0	400A: Display driver
400A ANALYZER	400A: Rosemount Analyzer
25A0001R0	400: Glow plug / igniter
25C0001R0	400A light up procedure
25C0007R0	400A: 4-20 mADC board
400A-ALARM	400A: alarm module
25C0005R0	400A: cable 16 conductor
25C0009R0	400A: Door, Inside plexiglass
25C0004R0	400A: high range capillary
25C0003R0	400A: mixed fuel capillary
25C0002R0	400A: pure fuel capillary
620443RU	400A: RANGE SWITCH BD
400A-REPAIR	400A: repair of analyzer
620423-REPAIR	400A: Repair of Preamp Board
73659	400: Burner Tip Assembly
630375	400: Cap assy w/glow plug
73658	400: collector assy
73674	400: Electrode kit
617900	400: Glow plug / igniter (*)
834341	400: Lamp, Pilot {*}
643459	400: SS GAUGE, 5psig
6A00324G01	400A: Main Elect Bd Updated
656888	400A: Air restrictor blue dot
620428	400A: BOARD, AMPLIFIER *
621031	400A: CABLE, 16 COND
655178	400A: Door,Inside plexiglas{*}
620446	400A: Flame Out Bd (Obsolete)
656921	400A: high range capillary {*}
860918	400A: igniter toggle switch{*}
630669	400A: Mixed fuel restrict red
620423	400A: Preamp Board
620443	400A: RANGE SWITCH BD
898904	400A: reed relay {*}
904731	400A: reed relay 5V, 1A {*}
898861	400A: relay, 24v {*}
876447	400A: SPAN POT, 30K {*}
655171

Part Number	Description
** BOARDS
1L03628G01	CPU BOARD ASSY
1L03394H01	REPLACED BY 1N04967G01
1N04967G01	RELAY OUTPUT & TERM. PANEL KIT
3D39097G01	ANALOG OUTPUT CARD, CRE
1N04956G02	GENERAL USER INTERFACE
1N04957G02	ADP CRU
3D39263G01	DETECTOR AMPLIFIER ASSY
3D39028G01	INTERCONNECT BOARD ASSY
1A97965H01	POWER SUPPLY, LAMP
9679D01G01	rs232/rs-232/422 PCB ASSY CONVERTER
3D39055G01	CRE/OPM DRIVER BOARD ASSY
4843B05G01	IO PLEXER ASSY
4843B05H02	INPUT MODULE, #IV5, 0-5V
4843B05H03	REPLACED BY 1A98478H01
1A98478H01	INPUT MODULE DUTEC #IAC5
4843B05H04	REPLACED BY 1A98479H01
1A98479H01	OUTPUT MODULE DUTEC #0AC5
** ELECTRICAL
4841B76H02	LAMP (replaced by 40B0011R0)
40B0011R0	LAMP, #L8008, frosted
1A97962H01	THERMOSTAT,
1A97964H01	REPL BY 1A97964H03
1A97964H03	HEATER, 120 VOLT, 300 WAT
4511C83H02	REPL BY 4511C83H01
4511C83H01	BLOWER MOTOR
3532B25H01	SWITCH, DIFF. PRESS.
** FILTERS
4841B92H01	REPL BY 4843B09H01
4843B09H01	FOAMEX FILTER, SIF 45 PPI
4841B92G01	(bad part number in manual)
4841B92H02	REPL BY 4843B09H02
4843B09H02	FOAMEX FILTER, SIF 60 PPI
4841B94H01	REPL BY 4843B11H01
4843B11H01	FILTER RETAINER
9884A16H02	REPLACED BY 9884A16H05
9884A16H05	FILTER, POLYURETHANE
9884A16H04	FILTER CARTRIDGE ASSY BLWMOTOR
1A99231G01	FILTER KIT
1A98248G01	SPARE PARTS KIT
** LCWs
4842B37G01	REPLACED BY, CONSULT RIGAS
4843B15G01	REPLACED BY, CONSULT RIGAS
1A98904G01	GLASS LCW RETROFIT KIT 3-10 FT
4848B50G02	LCW 1, REPLACED BY 40F0050R02
40F0050R02	LCW 1, Single element
4848B50G01	LCW 2, REPLACED BY 40F0050R01
40F0050R01	LCW 2, Multi-segment
1A99433G01	Temperature control retrofit kit
** MECHANICAL
3532B51H01	CHECK VALVE

Category: Replacement Parts

ROSEMOUNT 755, 755G, 755A, 755R PARTS LIST (ALSO BECKMAN)

ROSEMOUNT 400A PARTS LIST (SIMILAR TO BECKMAN 400) (HYDROCARBON ANALYZER)

OPM2000 PARTS LIST

25C0007R0 4-20 MADC ISOLATED OUTPUT BOARD (REPLACES OEM 620433 & 621023)

Similar fit / function parts

How does the 400A work?

What is THC?

35K0104R0, NOx Detector 0-800ppm CLD 200 cc/min, Replaces Rosemount 659754 and Tyco 1021326-100-TES

List of common CLD issues

CEMS & Opacity Monitor Field Service Engineer – Experience Required Wooster, OH