RKI Instruments EAGLE 2 Manual - Manual (Page 190)

180 • Description EAGLE 2 Operator’s Manual
See “Replacing the ESM-01 Sensor or Changing Sensor Type” on page 199
for instructions to replace or change an ESM-01 sensor.
Figure 35: Typical ESM-01 Sensor Location
The ESM-01 sensor is installed in a single sensor flow chamber which is
located in the area next to the standard 4-sensor flow chamber. This area can
accommodate up to three single sensor flow chambers. Although the EAGLE
2 can support up to three ESM-01 sensors, many combinations are
impractical for various reasons including sensor cross sensitivity to other
gases. Consult RKI Instruments, Inc. for practical combinations. Figure 35
above illustrates a typical ESM-01 sensor location in front of the pump. The
ESM-01 flow chamber may also be installed in one of the other two sensor
chamber locations depending on the particular version of the EAGLE 2.
Some ESM-01 instrument configurations do not include the 4-sensor flow
chamber.
ESM-01 Sensor
The ESM-01 sensor is a cylindrical sensor with a diffusion opening on the
front and a 12 pin circular connector on the back. A 12 wire cable plugs into
the back of the ESM-01 sensor with a circular connector that includes a
locking lever. The other end of the cable plugs into an ESM-01 sub PCB (see
description below) that is installed on the main PCB. The sensor is held in the
ESM-01 flow chamber by a bracket on standoffs.
CO Sensor
Pump
LEL Sensor and
Sensor Bracket
Charcoal Filter
Oxygen Sensor
Bracket
H2S Sensor
Top Case Not Shown
Standard Flow Chamber
Oxygen Sensor
ESM-01 Sensor