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Dissolved Oxygen Sensor Care and Use Instructions
Product Instructions
Introduction
Your Sensorex Dissolved Oxygen (DO) sensor is a galvanic
electrochemical device; i.e. it does not require power from
your meter or controller to generate its signal (for mV output
models only). The DO sensor will provide a millivolt signal pro-
portional to the concentration of oxygen in the water (model
DO6400, DO6400TC) or 4-20mA current output (models
DO6441 and DO6442). Your Dissolved Oxygen sensor con-
sists of an cathode, anode, and an electrolyte separated from
your process fluid by an oxygen permeable membrane. The
oxygen passing through the membrane reacts at the cathode,
giving up electrons, which produces an electrical current. See
FIG.1 for sensor ID.
Electrical Connections
DO6400 and DO6400TC models(mV output):
Red wire of Sensor to DO input + (cathode)
Black wire of Sensor to DO input - (anode)
White and Green wires of Sensor to Temperature input
(see wiring FIG 2.)
DO6441, DO6441TC, DO6442, DO6442TC (4-20mA output):
Red wire of Sensor to DO input + (cathode)
Black wire of Sensor to DO input - (anode)
(see wiring FIG 3.)White and Green wires of Sensor to Temperature input
DO6441, DO6441TC, DO6442, DO6442TC (Modbus485 output):
Red wire of Sensor to DO input + (cathode)
Black wire of Sensor to DO input - (anode)
(see wiring FIG 3.)White and Green wires of Sensor to Temperature input
Getting Your DO Sensor Ready to Use
Your DO sensor is shipped to you dry and is not ready for use. See
steps #1, #7, #8, #9 and #10 of the "Sensor Reconditioning"
section of this sheet for instructions on sensor preparation.
The installed membrane shipped with the probe is usable if it
passes the leak test in step #8. Maintenance items included
with your sensor include: 1 each membrane lock tool, 2 each
PTFE or HDPE membranes, 2 each membrane o-rings and
250mL of electrolyte.
Parts covered by this product data sheet include:
DO6400, DO6400TC, DO6441, DO6442, DO6441TC, DO6442 TC
Page 1 of 8
PRODUCT INSTRUCTION SHEET
#3
FIG. 1
#2
#1
Part Number
DO6400
DO7400
DO6441
DO6442
DO7441
DO7442
FIG. 2
4-20mA mV output models
FIG. 3
Cable Shrink
Shrink Colors
#1
#2
#3
N/A
N/A
N/A
white
N/A
N/A
yellow
N/A
N/A
green
yellow
N/A
yellow
white
N/A
green
yellow
white
Form: InstrDO6400-B [Rev: 2016-02-19]
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Summary of Contents for Sensorex DO6400
- Page 1 PRODUCT INSTRUCTION SHEET Dissolved Oxygen Sensor Care and Use Instructions Product Instructions Introduction Your Sensorex Dissolved Oxygen (DO) sensor is a galvanic FIG. 1 Cable Shrink electrochemical device; i.e. it does not require power from your meter or controller to generate its signal (for mV output models only).
- Page 2 PRODUCT INSTRUCTION SHEET Mounting Your DO Sensor Submersion mounting of the sensor is recommended. To FIG. 4 prevent air bubbles from becoming trapped on the membrane and producing falsely high DO readings, it is recommended that the sensor be mounted at a slight angle (SEE FIG. 4). Sensor Re-Conditioning 1.
- Page 3 PRODUCT INSTRUCTION SHEET Sensor Re-Conditioning(cont.) FIG. 9 FIG. 8 5.To clean, take the top part of the sensor and immerse in distilled white vinegar (3% acetic acid) for about 30 minutes. If you don't have vinegar, you can use a SOFT toothbrush, dish washing powder, and clean water, clean the cathode, anode, and plastic between them.
- Page 4 For sensors that have been installed read less than 2 mV for series DO6400 and DO7400, and in service, gently wipe the membrane using a soft cloth to less than 5mA for series DO6441, DO6442, DO7441, DO7442 remove accumulated biological debris.
- Page 5 18-22mA DO6442: 11-14mA Output at 0% Saturation (mV models) PTFE & HDPE Membrane: <1mV Output at 0% Saturation (mA models) <4.6mA DO6400 and DO6441, 6442 Temperature Range Max: 50 deg C Min: 0 deg C Response Time PTFE Membrane: 5 minutes from 100% to 0% Oxygen (<1mV or 4.5mA)
- Page 6 PRODUCT INSTRUCTION SHEET TEMPERATURE SALINITY- in parts per thousand (ppt) deg C deg F 14.6 14.11 13.64 13.18 12.74 12.31 11.9 11.5 11.11 33.8 14.2 13.73 13.27 12.83 12.4 11.98 11.58 11.2 10.83 35.6 13.81 13.36 12.91 12.49 12.07 11.67 11.29 10.91 10.55...
- Page 7 PRODUCT INSTRUCTION SHEET Page 7 of 8 Form: InstrDO6400-B [Rev: 2016-02-19]...
- Page 8 PRODUCT INSTRUCTION SHEET Page 8 of 8 Form: InstrDO6400-B [Rev: 2016-02-19]...
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