Mass Flow Controllers & Meters

model

Gas Select COMPOSER Gas Mix Calibration Firmware

Personalized gas compositions for accurate mixed gas measurement

When your gas mixture changes, Alicat’s COMPOSER™ is ready to adapt with you, on the fly. With COMPOSER, you can define and store up to 20 customized gas mix compositions that your gas mass flow instrument can use to measure mixed gas flow rates, all without a factory recalibration. 

  • Accurate. Define gas compositions to 0.01% for each of up to 5 constituent gases, without compromising your Alicat’s accuracy.
  • Easy. Use the menu interface to create your gas compositions, or generate gas lists for multiple units in seconds with single-line serial commands.
  • Personalized. Create and store 20 COMPOSER gas mixes simultaneously on each device, and delete the ones you no longer need. Your COMPOSER user mixes are stored in the on-board gas list with your factory gas calibrations.

COMPOSER is part of the Gas Select™ firmware found on most Alicat gas mass flow meters and mass flow controllers. Gas Select uses NIST Ref Prop 9 gas properties data for up to 130 preloaded gas calibrations. Users may switch between selected gases on the fly without any need for recalibration of the mass flow meter or controller.

Creating a COMPOSER gas mix through your Alicat’s front panel interface is easy!

  1. Name your new gas mixture.
  2. Choose any of the 98 or 130 gas calibrations that have been preloaded into your Alicat at the factory.
  3. Define the mixture percentage for your chosen gas.
  4. Add up to 4 more gases.

Use your RS-232 or RS-485 serial connection to create a COMPOSER gas mix with a single command:

  • [unit ID]gm [mix name] [gas number, or 0 for next available number] [1st gas composition %] [1st gas ID in Gas Select] [2nd gas composition %] [2nd gas ID in Gas Select]

For example, to generate a COMPOSER user mix called “Laser2” with a composition of 71.35% He + 19.25% N2 + 9.4% CO2 on an Alicat with a unit ID of A, simply type the following into your serial interface:

  • agm Laser2 0 71.35 7 19.25 8 9.4 4 <enter/carriage return>

• Acetylene (C2H2)
• Air
• Argon (Ar)
• i-Butane (i-C4H10)
• n-Butane (n-C4H10)
• Carbon dioxide (CO2)
• Carbon monoxide (CO)
• Deuterium (D2)
• Ethane (C2H6)
• Ethylene/Ethene (C2H4)
• Helium (He)
• Hydrogen (H2)
• Krypton (Kr)
• Methane (CH4)
• Neon (Ne)
• Nitrogen (N2)
• Nitrous Oxide (N2O)
• Oxygen (O2)
• Propane (C3H8)
• Sulfur Hexafluoride (SF6)
• Xenon (Xe)

• 5% CH4 95% CO2
• 10% CH4 90% CO2
• 15% CH4 85% CO2
• 20% CH4 80% CO2
• 25% CH4 75% CO2
• 30% CH4 70% CO2
• 35% CH4 65% CO2
• 40% CH4 60% CO2
• 45% CH4 55% CO2
• 50% CH4 50% CO2
• 55% CH4 45% CO2
• 60% CH4 40% CO2
• 65% CH4 35% CO2
• 70% CH4 30% CO2
• 75% CH4 25% CO2
• 80% CH4 20% CO2
• 85% CH4 15% CO2
• 90% CH4 10% CO2
• 95% CH4 5% CO2

• EAN-32 (32% O2+68% N2)
• EAN-36 (36% O2+64% N2)
• EAN-40 (40% O2+60% N2)
• EA-40 (40% O2+60% Air)
• EA-60 (60% O2+40% Air)
• EA-80 (80% O2+20% Air)
• Heliox-20 (20% O2+80% He)
• Heliox-21 (21% O2+79% He)
• Heliox-30 (30% O2+70% He)
• Heliox-40 (40% O2+60% He)
• Heliox-50 (50% O2+50% He)
• Heliox-60 (60% O2+40% He)
• Heliox-80 (80% O2+20% He)
• Heliox-99 (99% O2+1% He)
• Metabolic Exhalant (16% O2+78.04% N2+5% CO2+0.96% Ar)

• P-5 (5% CH4+95% Ar)
• P-10 (10% CH4+90% Ar)

Coal Gas 50% H2+35% CH4+10% CO+5% C2H4
Endothermic Gas 75% H2+25% N2
HHO 66.67% H2+33.33% O2
LPG HD-5 96.1% C3H8+1.5% C2H6+0.4% C3H6+1.9% n-C4H10
LPG HD-10 85% C3H8+10% C3H6+ 5% n-C4H10
Nat Gas 1 93% CH4+3% C2H6+1% C3H8+2% N2+1% CO2
Nat Gas 2 95% CH4+3% C2H6+1% N2+ 1% CO2
Nat Gas 3 95.2% CH4+2.5% C2H6+0.2% C3H8+0.1% C4H10+1.3% N2+0.7% CO2
Syn Gas 1 40% H2+29% CO+20% CO2+11% CH4
Syn Gas 2 64% H2+28% CO+1% CO2+7% CH4
Syn Gas 3 70% H2+4% CO+25% CO2+1% CH4
Syn Gas 4 83% H2+14% CO+3% CH4

• 4.5% CO2+13.5% N2+82% He
• 6% CO2+14% N2+80% He
• 7% CO2+14% N2+79% He
• 9% CO2+15% N2+76% He
• 9.4% CO2+19.25% N2+71.35% He
• 9% Ne+91% He

• 89% O2+7% N2+4% Ar
• 93% O2+3% N2+4% Ar
• 95% O2+1% N2+4% Ar

• 2.5% O2+10.8% CO2+85.7% N2+1% Ar
• 2.9% O2+14% CO2+82.1% N2+1% Ar
• 3.7% O2+15% CO2+80.3% N2+1% Ar
• 7% O2+12% CO2+80% N2+1% Ar
• 10% O2+9.5% CO2+79.5% N2+1% Ar
• 13% O2+7% CO2+79% N2+1% Ar

• C-2 (2% CO2+98% Ar)
• C-8 (8% CO2+92% Ar)
• C-10 (10% CO2+90% Ar)
• C-15 (15% CO2+85% Ar)
• C-20 (20% CO2+80% Ar)
• C-25 (25% CO2+75% Ar)
• C-50 (50% CO2+50% Ar)
• C-75 (75% CO2+25% Ar)
• He-25 (25% He+75% Ar)
• He-50 (50% He+50% Ar)
• He-75 (75% He+25% Ar)
• He-90 (90% He+10% Ar)
• A1025 (90% He+7.5% Ar+2.5% CO2)
• Stargon CS (90% Ar+8% CO2+2% O2)

*These gases require S-Series instruments (MS/MCS/PS/PCS).

• Ammonia (NH3)
• Butylene (1-Butene)
• Cis-Butene (cis-2-Butene)
• Iso-Butene
• Trans-Butene
• Carbonyl Sulfide (COS)
• Chlorine (Cl2)
• Dimethylether (CH3OCH3)
• Hydrogen Sulfide (H2S)
• Nitrogen Trifluoride (NF3)
• Nitric Oxide (NO)
• Propylene (C3H6)
• Silane (SiH4)
• Sulfur Dioxide (SO2)

*These gases require S-Series instruments (MS/MCS/PS/PCS).

• R-11 Trichlorofluoromethane (CCl3F)
• R-14 Tetrafluoromethane (CF4)
• R-22 Difluoromonochloromethane (CHClF2)
• R-23 Trifluoromethane (CHF3)
• R-32 Difluoromethane (CH2F2)
• R-115 Chloropentafluoroethane (C2ClF5)
• R-116 Hexafluoroethane (C2F6)
• R-124 Chlorotetrafluoroethane (C2HClF4)
• R-125 Pentafluoroethane (C2HF5)
• R-134A Tetrafluoroethane (CH2FCF3)
• R-142B Chlorodifluoroethane (CH3CClF2)
• R-143A Trifluoroethane (C2H3F3)
• R-152A Difluoroethane (C2H4F2)
• RC-318 Octafluorocyclobutane (C4F8)
• R-404A (44% R-125+4% R-134A+52% R-143A)
• R-407C (22% R-32+25% R-125+52% R-134A)
• R-410A (50% R-32+50% R-125)
• R-507A (50% R-125+50% R-143A)

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