Specifications

Maxum II Specifications, Continued
Installation (continued)
DC Power
(optional)
Modular Oven Configuration Only:
24VDC +/-10%, 10A minimum, with 32V over voltage protection limit (from
power source).
Power must be regulated, with 100mV max, pk-pk, noise/ripple measured
with 20MHZ bandwidth.
The power must be limited to 20A by short circuit protection, fusing or
circuit breaker.
External 24V must be accepting of the negative terminal being grounded to
earth potential.
Instrument Air 50 psig (345kPa) minimum for units using Model 11 or Valco valves
120 psig (828 kPa) minimum for units using Model 50 valves
25 psig (173 kPa) minimum for air bath oven; 3 scfm (85
liters/minute)/oven
No instrument air for airless oven or modular oven heating (electronics
compartment purge still required with airless oven).
100 psig (690 kPa) minimum for units using Vortex tubes;
at dewpoint -40°F (-40°C) 15 scfm (85 liters/minute)
Configuration Single unit with multiple compartments. Indoor mounting with protection
from weather and corrosive or dirty atmosphere is strongly recommended
to enhance life and improve maintainability.
Carrier Gas Cylinder nitrogen, helium, or argon at 99.998% purity, or hydrogen at
99.999% purity depending on application
Typical consumption – 180 scf/month/detector module (5100
liters/month/detector module)
Flame Fuel Hydrogen at 99.999% purity with no more than 0.5 ppm total hydrocarbons
Typical consumption – 70 scf/month/detector module
(2000 liters/month/detector module)
(Not applicable to Modular Oven)
Flame Air Zero grade air (< 1ppm THC, O
2
content 20-21%). Supplied from
instrument air with catalytic purifier (optional). Typical consumption – 900
scf/month (26,000 liters/month)
(Not applicable to Modular Oven)
Corrosion Protection Dry air purge to protect electronics (Airbath/Airless oven configurations
only)
Stainless steel oven protection
Painted steel exterior (epoxy powder coat)
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