Ntron SenzTx How to use

SenzTx
Zirconia Oxygen Analyzer
WITH 0-10V ANALOGUE OUTPUT
Short Form user Manual
The

Table of Contents
1.1. General Information........................................................................................................................3
1.1.2 Intended Use of the SenzTx.................................................................................................3
1.1.3 The Measuring Cell/Sensor Element ........................................................................3
1.1.4 Unintended Use of the SenzTx Analyzer ...........................................................................4
1.1.5 Construction............................................................................................................................4
1.1.6 Calibration of the Measuring Instruments...........................................................................4
1.2. Technical Description.....................................................................................................................5
1.2.1 Connection ..............................................................................................................................5
1.2.2 Technical Data........................................................................................................................5
1.2.3 Installation................................................................................................................................7
1.3. Maintenance and Calibration of Measuring Cells....................................................................9

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1.1. General Information
1.1.2Intended Use of the SenzTx
The Analyzer are designed to monitor a sample containing an oxygen content to be measured within the
specified ppm or % ranges.
The Analyzer can be used in combination with the control system (PLC) or as a standalone oxygen-
measuring-system.
1.1.3The Measuring Cell/Sensor Element
This Analyzer uses a semiconductor measuring cell made of Zirconium dioxide and is specific to
oxygen. Due to the high temperature and the catalytic activity of the platinum coating of the sensor it
has low cross-sensitivities to other gasses. The benefits of this technology give a long sensor life,
typically 5 years or more however it should be noted that exposure to aggressive gaseous substances
can reduce the operational life of the sensor.

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1.1.4 Unintended Use of the SenzTx Analyzer
The Analyzer can also be used in other applications outside of those described in this manual. However,
the user should check with the manufacture beforehand.
CAUTION
Risk of damage!
The SenzTx Analyzer should only be operated in the way set out in this
manual.
1.1.5 Construction
The SenzTx Zirconia Oxygen Analyzer consists of a measuring cell and associated electronics,
separated by a gastight clamp flange. The measuring cell (sensor) is mounted within a metal
bracket, provided with a thread for easy changing of the measuring cell. The measuring cell is
connected with the electronics by a vacuum-tight arrangement. The electronics is arranged in a
metal housing, which is mounted directly on a flow through adapter. The Analyzer is powered by
24VDC and provides an analogue output signal of 0-10V DC and other additional interface signals.
See section 1.2.1 for specific information.
1.1.6 Calibration of the Measuring Instruments
The equipment is calibrated before shipping. The calibration cycles are dependent on
the application and the applied gases.
Note!
Though the SenzTx Zirconia Sensor is a very stable instrument, Ntron
recommends a calibration check be made at least annually by suitably
trained technicians. If it is determined that a re-calibration is required,
please contact Ntron for details. Calibration is not within the scope of
this manual.
After changing of measuring cells a recalibration is mandatory.
Electronics and measuring cell are calibrated with certified calibration gases by the
manufacturer; there are no setting options available for the user.

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1.2. Technical Description
1.2.1 Connection
The Oxygen measurement equipment is connected by a M12x1mm threaded-connecting plug (8pin).
Pin Assignment:
Pin - No .
Contac t
Cable colour
1
0-10V Output (+)
Black
2
Not used
N/A
3
0-10V output Ground
Green
4
Serial RS485 (B)
Yellow
5
Serial RS485 (A)
Grey
6
Power Ground OVDC
White
7
Supply +24 VDC
Blue
8
Not Used
N/A
Industry standard 0-10V interface required. Active 0-10V DC output from the Senz Tx
1.2.2 Technical Data
Mechanical Data
Dimensions:
Ø47mm x 143mm(L)(Depends on model)
Process Connection
Typically G1/8”(Flow Through base)
Weight:
0.260 kg
Electrical Data
Supply Voltage:
24 VDC ±10%, max. 50mA
Protection Class:
IP 53
Environment
Ambient temperature:
+5 to +50 °C
Pressure:
800 to 1200 mbar
(Differential pressure between Analyzer
and electronics max. =100 mbar)
Volumetric flow-rate:
0.25 LPM ±10% recommended
Measuring
Range:
0-1000ppm, 0-25%,0-96%
Sensitivity:
0.01% O2
25%:-0.1% O2(Vol)
Response time (0 - 90 %):
< 5Hours to 1ppm for ppm range.
<3minutes for % range..
Warming up time:
10 minutes

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Cell Life 1):
3-5 Years
Cross sensitivities
none for normal applications
(no aggressive gases)
1) In absence of reactive gases.
2) Sensor life is typical but dependent on many factors. (See also chapter 1.1. Intended Use).

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1.2.3 Installation
.
Note!
Before connecting voltage, the SenzTx Oxygen Analyzer should be exposed to
inert gas for at least 1 minute.
CAUTION
Risk of damage!
The SenzTx Zirconia Oxygen Analyzer should not be subjected to moisture in the
sample gas stream when cold (not powered). It is advised than any moisture and
other contaminants are removed from the sample gas stream prior to entering the
SenzTx measurement stream.
Typical connection diagram.
Note: any unused cable cores must be suitable
insulated. Cable supplied.

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M12 connector

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1.3. Maintenance and Calibration of Measuring Cells
All SenzTx Oxygen Analyzers undergo a certified calibration before shipping.
User calibration is not within the scope of this manual

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