Part 2 Installation
2.2
Mounting the Oxygen Transmitter
The EMD-570 is designed as a general purpose device. For field installations, consider mounting in a
NEMA4X or IP66 enclosure for added protection against the elements.
Refer to part 3 operation section of this instruction manual for more information on how to operate the
controls of this oxygen transmitter.
Refer to part 4 maintenance section for an overview on how to calibrate the device using a certified span
gas or ambient air.
A precision electrochemical oxygen sensor is included as a separate item and must be installed prior to
instrument use.
CAUTION: Do not open the N2 filled oxygen sensor bag until you have thoroughly read the instruction
manual and have made all gas and electrical connections. Please refer to section 2.6 or 2.7 to reference
installing the oxygen sensor into the sensor housing as well as section 4.1 and 4.2 on SPAN Calibration.
When installing the device, it is important to make sure the bottom portion of the sensor housing, which
is manufactured from stainless steel is mounted flat and the top portion of the sensor housing with built-
in electronics which is manufactured of black nylon is at the top. This will insure that the sensor is always
face down (screen side down, circuit board facing up). This will allow any air bubbles to rise to the top and
not interfer from the sensing membrane.
Oxygen Sensor Front and Rear View
CAUTION: Make sure plug is all the way in before a volt-
age is applied. Plugging in Connector with a 12 - 24V DC
power connected can short out the 4 - 20mA output.
The supplied cable has 4 internal wires which should be
connected as follows:
red wire
=
(+) 12 - 24V DC
black wire =
(-) 12 - 24V DC
Yellow wire =
(+) 4 - 20mA
Green wire = (-) 4 - 20mA
2x 1/8”
Swagelok
Fittings
2x 8-32
UNC
1.375 in.
34.92 mm
2.526 in.
64.15mm
4.530 in.
115.10mm
