9
be unable to power the 2
nd
, 3
rd
and 4
th
docks in the series. There are two
options in this case. The first option is
to connect each dock to a suitable
power source using the wall cube power
supply that was included with the IQ
Express Dock. A suitable, grounded
power strip may be used. The second
option is to purchase the optional power
supply that is capable of running up to
four IQ Express Docks from a single
electrical outlet.
Figure 2.6.2 Preferred Method for USB
Connection and Powering Multiple IQ
Express Docks.
Under no circumstances can multiple IQ
Express Docks be run from a single USB
port without supplemental power.
2.7 Connecting the Calibration
Gas Cylinder(s) to the
Dock(s)
Connection requirements for calibration gas
cylinders vary with how many docks will be
connected to the cylinder and whether the
calibration gas is considered reactive.
Enhanced versions of the IQ Express
include a tubing assembly that is suitable for
use with reactive gases.
Figure 2.7. IQ Express Gas Ports
For instructions on connecting the gas
cylinder to a single IQ Express dock
proceed to section 2.7.1.
For instructions on connecting the gas
cylinder to multiple IQ Express docks
proceed to section 2.7.2.
2.7.1 Single Cylinder to Single IQ
Express Dock
1. Insert the demand flow regulator into the
calibration gas cylinder.
2. Standard docks are delivered with a 24”
piece of tubing with a white quick
disconnect on one end. Enhanced
docks are delivered with a 24” piece of
tubing that meets a black elbow fitting
followed by a 1” piece of standard
tubing. Slide the open end of the tubing
assembly over the regulator. For
enhanced docks, slide the open end of
the 1” piece of tubing over the regulator.
Figure 2.7.1 Standard versus Enhanced
Setup for Regulator and Tubing
