System Requirements
API 4000 Site Planning Guide
12
Gas Requirements
The API 4000 instrument requires several types of input gas. The recommended purities
and pressures of these input gases should be adhered to for proper operation of the
instrument. The stated gas purities are given as required at the instrument.
NOTE:
When switching gas sources while the instrument is running, ensure that a steady
supply is available as back up. If gas flow stops, the instrument will shut down.
Curtain/CAD Gas Supply
The gas supply for curtain and CAD gas requires an input of UHP (99.999%) nitrogen,
with an input pressure of 60 psig and flows up to 5 L/min.
Gas 1 and Gas 2
The gas supply for the Gas 1/Gas 2 connection requires an input of zero air or UHP
nitrogen with an input pressure of 100 psig to a maximum of 105 psig and flows up to
17 L/min. Nebulizer and sheath gas are derived from this input. The gas is internally
divided and controlled to provide one flow for TurboIonSpray nebulizer gas and heater
(turbo) gas, or APCI probe nebulizer gas, and a second flow for cooling and sheath gas.
Source Exhaust Supply
The source exhaust supply requires a regulated input of clean, dry, oil-free air at up to
50 psig and flows up to 6 L/min for the source exhaust (venturi) pump.
Component
Gas
Delivery (psig)
Gas Purity
Flow
Curtain and CAD
gas
N
2
60 psig max
UHP N
2
(99.999%)
5 L/min
Gas 1 and Gas 2
Zero air/N
2
100 psig
Zero air
17 L/min
Source exhaust
Clean, dry oil-
free air or N
2
50 psig
Clean, dry oil-free
air
6 L/min
