MODEL: O2-25-24
ASSEMBLY CONSISTS OF:
XP-O2 housing (supersedes PE-EX-O2)
ST1400-500-24 sensor (supersedes PE1400-500-24)
JB2 junction box
CB2 connector board
ELECTROCHEMICAL O2 DETECTOR
(Used with ST1400 O2 Sensor)
Part Number: MAN-0028-00 Rev. 0
WARRANTY POLICY
Net Safety Monitoring Inc Products, are carefully designed and m anufactured from high quality
components and can be expected to provide many years of trouble free service. Each product is
thoroughly tested, inspected and burned-in prior to shipment. Failures can occur which are
beyond the control of the manufacturer. Failures can be minimized by adhering to the operating
and maintenance instructions herein. Where the absolute greatest of reliability is required,
redundancy should be designed into the system.
Net Safety Monitoring Inc, warrants its sensors and detectors against defective parts and
workmanship for a period of 24 months from date of purchase and other electronic assemblies for
36 months from date of purchase.
No other warranties or liability, expressed or implied, will be honored by Net Safety Monitoring Inc.
Contact Net Safety Monitoring Inc. or the authorized distributor for details.
Table of Contents
DESCRIPTION ............................................................... 1
FEATURES .................................................................. 1
Figure 1 - O2 Detector Assembly ........................................... 1
SPECIFI CATIONS ............................................................ 2
SENSOR OPERATION ......................................................... 2
SENSING ELEMENT .................................................... 2
SENSOR OUTPUT ..................................................... 2
I NSTALL ATION ............................................................... 3
DETECTOR POSITIONING ............................................... 3
WIRING REQUIREMENTS ............................................... 3
Table 1 -Maximum Wiring Distances Sensor to Controller/Transmitter ............. 3
SENSOR WIRING ...................................................... 3
Figure 2 - Sensor Wiring ................................................. 5
START-UP PROCEDURE ...................................................... 6
CALIBRA TION ............................................................... 6
MAINTENANCE .............................................................. 6
SENSING ELEMENT REPLACEMENT ...................................... 6
TROUBL ESHOOTING ......................................................... 7
Table 2 - Troubleshooting Guide ........................................... 8
Appendix A
Net Safety Monitoring Inc. Electrostatic Sensitive Device Handling Procedure . . . . . . . . . . . . . . . i
Appendix B
Wire Resistance In Ohms ........................................................ii
DESCRIPTION
The Net Safety Monitoring Inc. O2-25-24 Electrochemical O Detector consists of an explosionproof enclosure, which contains sensor electronic circuitry and an electrochemical O sensing
element. This O sensor provides continuous monitoring of oxygen levels in the range of 0 to
2
2
2
25%. The sensor can be used with one of the Net Safety Monitoring Inc. Uni-Trol™ Controllers or
Display Modules, or it can be used with other devices that are capable of monitoring a 4 to 20 mA
dc input and allow for calibration. The explosion-proof sensor is CSA certified Class 1, Division 1,
Groups C and D.
FEATURES
Electrochem ical sensor for increased accuracy and reliability.
High specificity to O reduces the chance of false alarms resulting from the presence of
2
other gasses.
Temperature compensation to ensure consistent performance over the entire operating
temperature range.
Self-contained transmitter circuitry permits use without a separate transmitter.
Explosion-proof housing.
EMI/RFI hardening.
SPECIFICATIONS
Figure 1 - O Detector Assembly
2
-1-
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