MODEL: SO -100ppm. Optional 20ppm and 10ppm
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Available in: 24Vdc Version / 12Vdc Version / 10 - 32Vdc
ASSEMBLY CONSISTS OF:
XP-SO2 housing (supersedes PE-EX-SO2)
ST1300-XXX sensor (supersedes PE1300-24-20)
JB2 junction box
CB2 connector board
ELECTROCHEMICAL SO2 DETECTOR
(Used with ST1300 SO2 Sensor)
Part Number: MAN-0027-00 Rev 1
This manual is provided for informational purposes only. Although the information contained in this
manual is believed to be accurate, it could include technical inaccuracies or typographical errors.
Changes are, therefore, periodically made to the information within this document and incorporated
without notice into subsequent revisions of the manual. Net Safety Monitoring Inc assumes no
responsibility for any errors that may be contained within this manual.
This manual is a guide for the use of a Toxic Gas Transmitter and the data and procedures contained within
this document have been verified and are believed to be adequate for the intended use of the transmitter. If the
transmitter or procedures are used for purposes other than as described in the manual without receiving prior
confirmation of validity or suitability, Net Safety Monitoring Inc does not guarantee the results and assumes
no obligation or liability.
No part of this manual may be copied, disseminated or distributed without the express written consent of Net
Safety Monitoring Inc
Net Safety Monitoring Inc products, are carefully designed and manufactured from high quality components
and can be expected to provide many years of trouble free service. Each product is thoroughly tested,
inspected and calibrated 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 an authorized distributor for details.
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Table of Contents
DESCRIPTION ...................................................................... 1
FEATURES ........................................................................ 1
SPECIFICATIONS ................................................................... 2
SENSOR OPERATION ............................................................... 3
SENSING ELEMENT ............................................................ 3
Table 1 - % Cross Sensitivity of Electrochemical Sensor
to Other Gases (SO = 100%) .................................................. 3
SENSOR OUTPUT ............................................................. 3
I NSTALLATION ..................................................................... 3
DETECTOR POSITIONING ...................................................... 3
WIRING REQUIREMENTS ....................................................... 4
Table 2 - Maximum Wiring Distances ............................................. 4
Sensor to Controller/Transmitter ................................................... 4
SENSOR WIRING .............................................................. 5
START-UP PROCEDURE ............................................................. 7
CALIB RATION ...................................................................... 7
MAINTENANCE ..................................................................... 7
SENSING ELEMENT REPLACEMENT .............................................. 8
TROUBL ESHOOTING ................................................................ 9
Table 3 - Troubleshooting Guide ................................................ 9
APPENDIX A Electrostatic Sensitive Device Handling Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
APPENDIX B Wire Resistance In Ohms ................................................. 11
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DESCRIPTION
The Net Safety Monitoring Inc. SO -100 Electrochemical SO Detector consists of an explosion-proof
enclosure, which contains sensor electronic circuitry and an electrochemical SO sensing elem ent. This
SO sensor provides continuous m onitoring of sulphur dioxide (SO ) concentrations in the range of 0 to
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100 parts per million (PPM) (optional 10 and 20 PPM). 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 for hazardous locations for Class 1, Division 1, Groups C and D.
FEATURES
< Electrochem ical sensor for increased accuracy and reliability.
< High specificity to SO reduces the chance of false alarms resulting from the presence of 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.
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Figure 1 - SO2 Detetctor Assembly
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SPECIFICATIONS
< Operating Range:
0 to 10, 20 and 100 ppm.
< Response Time:
T90 response time <20 sec.
< Drift:
Less than 2 ppm per month.
< Accuracy:
±10 percent of applied gas concentration or ±3 ppm , whichever is greater.
< Sensor Life:
Comm only 2 to 3 years.
< Operating Voltage:
10 to 32Vdc. 24Vdc nominal.
Optional 12Vdc model available.
< Temperature Range:
Continuous Operation: -20ºC to +50ºC (-4ºF to +122ºF).
Recommended Storage: 0ºC to +20ºC (+32ºF to +68ºF).
< Humidity Range:
Continuous: 15 to 90% RH, non-condensing.
Intermittent: 0 to 90% RH, non-condensing.
Storage: 15 to 90% RH, non-condensing.
< Enclosure Material:
Anodized aluminum.
< Dimensions:
2.60 inches (6.6 cm) in width.
5.55 inches (14.1 cm) in length.
Refer to Figure 1.
< Shipping W eight (approximate) :
Aluminum Housing : 2.5 pounds (1.1 kilograms).
Sensing element : 0.2 pounds (0.1 kilograms).
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