PST PST-UM-2010-EN-02 Manual de usuario
Minox i Oxygen Transmitter
User Manual PST-UM-2010-EN-02
PST-UM-2010-EN-02
Minox i Oxygen Transmitter User Manual
ii ProcessSensing.com
Minox i Oxygen Transmitter
For PST contact information, visit
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This document is the property of Process Sensing Technologies and may not be copied or otherwise
reproduced, communicated to third parties, nor stored in any Data Processing System without the
express written authorization of Process Sensing Technologies.
©2022 Process Sensing Technologies
Issue No. Description Date Author Initials
01 Original document issued 03/2022 CdF
02 Re-brand template applied 08/2022 IMcC
Minox i Oxygen Transmitter User Manual
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Before using your Minox i
Safety information
Please read this manual, ensuring that you fully understand the content before attempting to
install, maintain or use the Minox i. Important safety information is highlighted throughout this
document as follows:
The caution symbol indicates instructions that must be followed to avoid damage to
equipment (hardware and/or software) or the occurrence of a system failure.
NOTE highlights an essential operating procedure, condition, or statement.
Abbreviations
The warning symbol indicates instructions that must
be followed to avoid minor, serious or even fatal injury to
personnel.
AC Alternating current
DC Direct current
°C Degrees celcius
°F Degrees fahrenheit
EC Electrochemical
g Grams
GND Ground
kg Kilogram
LED Light emitting diode
LPM Liters per minute
mA Milliampere
oz Ounces
PC Personal computer
PCB Printed circuit board
PLC Programmable logic controller
PPM Parts per million
SCFH Standard cubic feet per hour
S-S Solid-state
SS Stainless steel
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Contents
Before using your Minox i ...............................................................................................iii
Safety information ....................................................................................................................................iii
Abbreviations ..............................................................................................................................................iii
1 Introduction to Minox i ...................................................................................................1
1.1 Overview .................................................................................................................................................1
1.2 Structure .................................................................................................................................................2
1.3 Sensors ....................................................................................................................................................3
1.3.1 Electrochemical (EC) ................................................................................................................................. 3
1.3.2 Solid-state (S-S) .......................................................................................................................................... 3
1.4 Applications ..........................................................................................................................................3
2 Installation .........................................................................................................................4
2.1 Unpack the Minox i ............................................................................................................................4
2.2 Connect Minox i ..................................................................................................................................5
2.2.1 KF-40 flange and tri-clamp process connections with dimensions ....................................... 5
2.2.2 Flow-through process connection with dimensions .................................................................... 6
2.2.3 Electrical connection ................................................................................................................................ 7
3 Calibration ......................................................................................................................... 8
3.1 In-situ ......................................................................................................................................................8
3.1.1 Minox i 100 (ppm) / 200 (%) 8
3.2 Air calibration .................................................................................................................................... 10
4 Maintenance ....................................................................................................................11
4.1 General ................................................................................................................................................. 11
4.2 Replace the sensor .......................................................................................................................... 11
4.3 Check your Minox i ......................................................................................................................... 12
5 Appendices ...................................................................................................................... 13
Appendix A - Technical Specifications ............................................................................................ 13
Appendix B - Hazardous area certification..................................................................................... 14
Appendix C - Quality, recycling and warranty information .................................................... 15
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Minox i Oxygen Transmitter User Manual
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1 Introduction to Minox i
This manual is applicable to Minox i oxygen transmitter with electrochemical (EC) or solid-state
(S-S) sensors; and KF-40 flange, flow-through or tri-clamp connections.
1.1 Overview
ATEX, IECEx and UKCA certified, the Minox i is an intrinsically safe, 2-wire, loop-powered trans-
mitter, with a 4...20mA output. It is designed with proven sensor technology to accurately
measure O₂ in a variety of gases, in the most demanding applications and hazardous environ-
ments.
Minox i is available with the three process connections shown below.
NOTE: You must provide suitable mating flange and clamp for KF-40 and tri-clamp
connections.
Figure 1. Three process connections for Minox i
Minox i can be used with a Programmable Logic Controller (PLC) or suitable equipment capable
of providing a 4...20 mA loop-power interface. For operation in hazardous Ex-rated areas, the
interface must be provided via a suitable isolation barrier device.
The Minox i oxygen transmitter must only be operated in the way set out in this user man-
ual. Always verify electrical interface circuit compatibility before connection.
KF-40 flange Flow-through Tri-clamp
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1.2 Structure
The Minox i oxygen transmitter consists of an oxygen sensor and inbuilt microprocessor. They
are encased in stainless steel, with a process connection on the removable housing and an elec-
trical signal connector on the main housing.
The sensor is replaceable and can be accessed via the removable housing,
as shown in Figure 2:
Figure 2. Structure of Minox i with EC sensor (KF-40 flange pictured)
1.3 Sensors
1.3.1 Electrochemical (EC)
The Minox i EC oxygen sensor is a galvanic fuel cell capable of superior performance, accuracy,
and stability. Its operational life is typically up to 24 months in ambient air.
The sensor is designed to be unaffected by the presence of other background gases or hydro-
carbons, and the XLT variant is compatible with acid gases including pure carbon dioxide.
1.3.2 Solid-state (S-S)
The Minox i S-S sensor can operate with or without sample flow, making it ideal for in-situ mon-
itoring. The result is a linear output transmitter with a sensitivity that is constant throughout its
operating range.
It responds to the presence of electrons in its circuit by converting them to data, and reconvert-
ing them in an electrochemical reaction. This sensor has a life expectancy of up to three years
with normal operation.
Removable housing
Oxygen sensor
Main housing
Electrical signal connector
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1.4 Applications
Typically, the intrinsically safe Minox i oxygen transmitter can be used in the following applica-
tions:
• Inerting
• Glove box purge and containment solutions
• Sieving and powder transfer systems (PTS)
• Additive manufacturing
• Hydrogen generation
• Nitrogen generation
• Biogas and biomethane
• Pharmaceutical.
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2 Installation
Before installing your Minox i oxygen transmitter, ensure that its specifications are suitable for
the process or pipeline where it will be installed.
See "2.2.1 KF-40 flange and tri-clamp process connections with dimensions" on page 5 or "2.2.2
Flow-through process connection with dimensions" on page 6 for more guidance.
This product is not approved for use in applications where the sample gas is greater than
21 % volume O2.
2.1 Unpack the Minox i
NOTE The sensor is packed in a low O2 environment to preserve shelf life. It should not be
removed from its bag until you are ready to use it.
Your Minox i oxygen transmitter pack is comprised of the following equipment:
1. Minox i oxygen transmitter
2. Electrochemical or solid-state oxygen sensor
3. A MagTip calibration tool
4. Certificate of calibration
5. Cable fitted with M12 connector.
Figure 3. Contents of Minox i package
Leaving a sensor in ambient air conditions will reduce sensor life.
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