Rosemount Analytical Bx438 Operating Manual

2.0 INSTALLATION

2.1 UNPACKING AND INSPECTION

Inspect the carton for damage. If damage is found, contact the carrier imme­diately.

2.2 SENSOR PREPARATION
Sensor Preparation Guidelines: Carefully remove the plastic cap covering

the sensing end of the sensor. Avoid causing a vacuum by gently and slowly
twisting the sensor and cap until it is removed. Sensor is shipped dry, so elec­trolyte must be added prior to installation.

Remove membrane cartridge. Add 2 ml of electrolyte to the membrane car­tridge. Screw membrane cartridge back onto sensor body. Refer to Section

6.3 for additional details.

Connection of the Sensor to the Analyzer/ Transmitter:

1. Wire the sensor to the analyzer/transmitter. See the wiring tables in
Section 3.0.

2. Apply power to the analyzer/transmitter. After 24 hours, the sensor should
be ready for calibration. The polarization time is necessary to get stable
signals from the sensor. If the sensor is disconnected from the
analyzer/transmitter for a short time, allow the sensor to stabilize for at
least three times longer than the time is was disconnected. Time needed
for stabilization should not exceed 24 hours.

Mounting Guidelines: Mount the sensor using the PG 13.5 process thread.

NOTE

Do not install the sensor upside down.

Model Bx438

Dissolved Oxygen Sensor

Instruction Sheet

PN 51A-Bx438/rev.D
July 2005

MILLIMETER

INCH

WARNING

The electrolyte is acidic. Protect your hands with gloves and
use safety goggles. Avoid contact of the electrolyte with the
skin, eyes, and mucous membranes.

WARNING

Do not exceed temperature and pressure limitations of
100°C (212°F) and 174 psig (1200 kpa abs, 12 bar).

WARNING

Before removing the sensor, be absolutely
certain that the process pressure is reduced to
0 psig and the process temperature is lowered
to a safe level!

1.0 SPECIFICATIONS

Temperature Range: -10 to 100°C (14 to 212°F)
Maximum Pressure: 174 psig (1200 kpa abs, 12 bar)
Measurement Range: 10 ppb to 20 ppm or 0.1% to 200%

saturation, depending on instrument

Wetted Materials: Stainless Steel, Gold, Silicone, FDA-

approved EPDM

Process Connections: PG 13.5 thread
Cable Connector: Variopol
Cable Compatibility: VP 6.0
Compatible Analyzers: Rosemount Analytical Models 54eA,

5081-A, and Xmt-A

Compatible Mounting Accessory: Insertion or Retractable

Mounting Assembly, TriClamp Assembly

MODEL Bx438

For additional information, please refer to the Instruction Manuals CD shipped with this
product, or visit our website at www.emersonprocess.com/raihome/liquid/.

2

3.0 WIRING

Model 54eA Wiring

Model Bx438 uses a 22k NTC thermistor. The
thermistor is wired to terminals 1 and 3 of TB5.

Model Xmt-A-HT-10 WiringModel Xmt-A-HT-11 Wiring

Model 5081-A Wiring