Ntron Microx Online Operator's manual

Microx Online
Issue Number:
1.14
Issue Date:
17-07-2018
The
User Instruction Manual
Oxygen Analyser
With Electrochemical Sensor
Rev 1.0

1Introduction ....................................................................................................................... 1
1.1 Microx Online Analyser........................................................................................... 1
1.2 Operation.................................................................................................................... 2
1.2.1 %Vol Sensor........................................................................................................ 3
2Specification...................................................................................................................... 4
3Physical data..................................................................................................................... 5
3.1 Mounting and Dimensions ..................................................................................... 5
3.1.1 Field Connections............................................................................................... 6
3.1.4 Mounting Locations and Installation................................................................. 9
3.4 RS232 connections............................................................................................... 11
3.5 Analogue Output................................................................................................. 11
4Software Features.......................................................................................................... 12
4.1 Password.................................................................................................................. 12
4.1.1 Menu 1 –Calibrate sensor............................................................................... 14
4.1.2 Menu 2 –Analogue output FSD...................................................................... 15
4.1.3 Menu 3 –Set 4 mA output............................................................................... 15
4.1.4 Menu 4 –Set 20 mA output............................................................................. 16
4.1.5 Menu 5 –Analogue Output Simulation.......................................................... 16
4.1.6 Menu 6 –Sensor selection.............................................................................. 17
4.1.7.................................................................................................................................... 17
4.1.8.................................................................................................................................... 17
4.1.9.................................................................................................................................... 17
4.1.7 Menu 7................................................................................................................ 17
4.1.8 Menu 8 - Diagnostics........................................................................................ 17
4.1.9 Menu 9 - Restore.............................................................................................. 18
4.1.10 Menu 10 –Zero offset...................................................................................... 18
4.1.11 Menu 11 –PPM sensor Gain.......................................................................... 19
4.1.12 Menu 12 –% vol sensor gain.......................................................................... 19
4.1.13 Menu 13 –Sensor damping............................................................................ 20
4.1.14 Menu 14 –New sensor data............................................................................ 20
4.1.15 Menu 15 –Electronics zero............................................................................. 21
4.1.16 Menu 16 –Noise Rejection ............................................................................. 22
4.1.17 Menu 17 –Relay............................................................................................... 23
4.1.18 Menu 18 –Alarm levels.................................................................................... 24
4.1.19 Menu 19 –Alarm hysteresis............................................................................ 24
5Routine Maintenance & Servicing.............................................................................. 25
5.1 Routine Inspection and Maintenance................................................................ 25
5.2 Sensor Replacement.............................................................................................. 25
5.3 Password.................................................................................................................. 26

Issue:
1.14
Rev. 1.0
Page 1
1 INTRODUCTION
1.1 Microx Online Analyser
The Microx Online is a wall or surface mounting instrument is for the
measurement of % Oxygen volume levels taken from a process line.
Typically the sample source would indicate the Oxygen level in the related
process and the Microx Online would be configured to initiate an Alarm
condition if the Oxygen content measured is too high.
This can be typically be for process purity reasons such as in Nitrogen
generation processes. Thus the inverse of the Oxygen measurement can also
indicate the level of Nitrogen in the process being measured.
Key design features are:
•Sturdy compact enclosure
•Simple keypad calibration facility (utilising onboard LCD display).
•4-20mA current source output for gas level indication (10-bit
resolution).
•230VAC or 24VDC power supply
•RS232 output for transmission of live data to a PC.
•Status indicating light tower for audible/visual warning as an
option.
The Sample gas is supplied from( and exhausted to*) the sample location to
the via pipework provided and installed by the customer.
This sample gas is supplied under small positive pressure which can be
regulated down to a suitable level via the Regulator device within the Microx
Online Analyser.
The Sample gas then enters (and leaves) the Microx Online via integral 6mm
Bulkhead fittings.
*Alternatively, The Exhausted sample gas can be piped to a suitable vent
location.
Note! This Instrument is for Safe, Non-Hazardous(Non-Ex) locations of
operation only.

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Rev. 1.0
Page 2
1.2 Operation
When power is applied to the Microx Online Analyser, an initialisation
procedure is performed as follows:
•All the display segments are displayed
•The software version number is displayed
•The company name is displayed
•The sensor type is displayed
•The display then shows the gas level.
The Microx Online is now operational.
Note: The Microx Online Oxygen Monitor is based around the Microx
series of Oxygen Analyser controllers and contains some Menu
programming options which are not relevant to this Microx product and
its mode of operation.
Such menu’s and information are highlighted in this user manual as
‘Customer Access Not Permitted’ and other various warnings against
adjustment of such menu options. Please observe these prohibitions to
ensure correct operation of the Microx Online Oxygen Analyser
The Microx Online Oxygen Analyser is supplied factory configured and
calibrated for correct operation, and apart from sensor replacement and
periodic calibration, should require no further user intervention.

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Rev. 1.0
Page 3
1.2.1 %Vol Sensor
A % Volume Electrochemical sensor is an integral part of the Microx Online.
The % Volume measurement range of the Microx Online is factory set at 0 to
25%, with calibration at 20.9% O2.
This model uses Electrochemical technology Sensor which should give
accurate trouble free service during its lifetime. This is a consumptive type
Sensor and as such disposable* and requires regular periodic calibration and
replacement after 1 to 2 years operation(application dependent)
It needs to be ensured that if contaminants are present in the process from
where the sample is being taken, these are prevented from entering the
pipework and sensor.
Contaminants may include particulates or certain heavy vapours. Inline
Filtration of the sample may be required.
*Sensor is not be disposed of into the general waste stream but
disposal should be according to local waste recycling requirements, and due
to hazardous substances being released on destruction of the Sensor, only
approved/certified recyclers should be used for disposal.

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1.14
Rev. 1.0
Page 4
2 SPECIFICATION
Supply
Input Voltage
Options:
2310VAC/24 VDC.
Supply current:
140 mA at 24VDC nominal all relays energised,
20 mA drawn on current loop.
Outputs
Analogue Output:
4-20mA analogue output (10-bit resolution)
Sensor Input
No of Channels:
1
Sensor
%Vol oxygen 0-25% Electrochemical OC-32
Relays
3
Single pole change over.
Rating 6 Amps 250 v AC
Fuses
Fuse
500mA anti-surge on board fuse for circuit
protection.
Additional Features
Display:
4 Digit, 7 Segment Display.
Keypad:
4-Button Keypad
Software:
Software configuration, calibration and data
logging provided by PC communications.
RS232 Output
Weight
1.3Kg
Dimensions
219(265 inc. fittings)x280x156 (LxHxD)
Operating Temp.
-30oC to +400C

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3 PHYSICAL DATA
3.1 Mounting and Dimensions
Fig.1 shows the overall dimensions of the Gasenz on line.

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3.1.1 Field Connections
All connections to the module are provided in the form of screw terminals.
Access is gained by opening the Microx Online enclosure to reveal the
terminal connector strips on the rear of the control module backplate
NOTE: Confirm the Voltage supply option of the instrument before connecting
power.(230VAC or 24VDC)
The user field connection points are illustrated below. Cable glands are
provided for power and interface cabling.
The User is to make all field connections in suitable cable to local
regulation codes and taking into account the power requirements of the
instrument as detailed in section 2 (Specification) of this manual.
The AC supply connection should be protected by an upstream protective
device. 24VDC is available at the 24VDC terminals if an AC supply is connected.
If AC mains supply is not available then it is possible to power the unit from
24VDC source via these terminals.

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Internal layout