Ntron MICROX Operator's manual

Microx User Manual
Issue Date:
19/03/2019
F/W Ver.:
V233P
The
User Instruction Manual
Oxygen Analyser
Rev.: 1.2
Part Number.: 05-670

Microx User Manual
1Introduction ................................................................................5
1.1 MICROX MODULE ................................................................ 5
1.2 OPERATION...........................................................................
1.3 SENSOR INPUTS .................................................................. 6
2Specification...............................................................................7
3MICROX Module.........................................................................8
3.1 FUSES................................................................................. 8
3.2 MOUNTING OPTIONS............................................................ 8
3.3 FIELD CONNECTIONS........................................................... 9
3.4 RECOMMENDED SAMPLING SYSTEM PIPING #1.................. 12
(FOR STUB TUBE TYPE SENSOR CONNECTION)...................... 12
3.5 RECOMMENDED SAMPLING SYSTEM PIPING #2........................ 13
3.6 RS232 CONNECTIONS.......................................................... 14
3.7 ANALOGUE OUTPUT........................................................... 14
4Software Features....................................................................15
4.1 PASSWORD....................................................................... 15
4.2 MENU OPTIONS AND PASSWORD ASSIGNMENTS................... 16
4.2.1 Menu 1 –Calibrate sensor ....................................... 18
4.2.2 Menu 2 –Analogue output FSD............................... 19
4.2.3 Menu 3 –Set 4 mA output........................................ 19
4.2.4 Menu 4 –Set 20 mA output...................................... 20
4.2.5 Menu 5 –Analogue Output Simulation................... 20
4.2.6 Menu 6 –Factory Restore ........................................ 21
4.2.7 No Function............................................................... 22
4.2.8 Menu 8 - Diagnostics................................................ 22
4.2.9 Menu 9 –Factory Only.............................................. 23
4.2.10 Menu 10 –Zero offset............................................... 23
4.2.11 Menu 11 –PPM sensor Gain.................................... 24
4.2.12 Menu 12 –% vol sensor gain................................... 25
4.2.13 Menu 13 –Sensor damping ..................................... 26
4.2.14 Menu 14 –New sensor data..................................... 26
4.2.15 Menu 15 –Electronics zero...................................... 27
4.2.16 Menu 16 –Noise Rejection....................................... 28
4.2.17 Menu 17 –Relay........................................................ 29
4.2.18 Menu 18 –Alarm levels ............................................ 30
4.2.19 Menu 19 –Alarm hysteresis..................................... 30
4.2.20 Menu 20...................................................................... 31

Microx User Manual
5Routine Maintenance & Servicing..........................................32
5.1 ROUTINE INSPECTION AND MAINTENANCE .......................... 32
Before turning on power to the Analyser
and Sensor, ensure that the voltage is
correct. See the specification section of
this manual for details.
The DIN Rail Mounting Microx Analyser module
and Sensor operate with an Extra Low Voltage
power source.(ELV)
No special personnel protective measures are
necessary but it must be ensured that the user
connects a suitable power source to the Microx
Analyser within the voltage range specified for
this product.
The Panel and Wall mount versions can be
mains powered (110-240VAC) option at time of
order.
The user should ensure that any installation and
wiring and upstream protective devices are
provided in line with the appropriate regulatory
requirements.
Zirconia Sensors operate at moderately
elevated temperatures and can cause
minor discomfort if held in contact with
fingers or hands for a number of
seconds.

Microx User Manual
Revision Summary
•Implemented Password System (E:20)
•Implemented Factory Restore Function (E:6)
•Implemented View Serial Number facility in
Software via Menu E:8.

Microx User Manual
Rev. 1.2
V233P
Page 5
1 INTRODUCTION
1.1 Microx Module
The MICROX Module has been designed to allow OEM’S (Original Equipment
Manufacturers) to use the module within their own equipment. Typically, the
DIN and Panel Mount Microx Analyser would be mounted within a control
panel with the sensor connected to the process sample point either within the
panel or external to the panel. The Wall Mount version is suitable for mounting
in the operational location without further mechanical protection, following a
suitable risk survey being undertaken by the user.
Key design features are:
•Compact enclosure
•Simple keypad calibration facility (utilising onboard LCD display).
•4-20mA current source output for gas level indication (10-bit
resolution).
•Input voltage range, 24VDC Nominal
or 110-240 VAC. (Panel and Wall mount versions)
•PCB mounted screw terminals for all connections.
•RS232 output for transmission of live data to a PC.
3.1 Operation
When power is first applied to the Microx module 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 module is now operational

Microx User Manual
Rev. 1.2
V233P
Page 6
1.2 Sensor Inputs
The Microx Module is designed to interface with any one of the following 3
principal types of sensor technology.
Electro-Chemical
Solid State
Zirconia Dioxide
A number of different measurement ranges are possible as follows;
0-1000 ppm O2
0-10000 ppm O2
0-25% Vol. O2
0-96% vol. O2
The above list represents standard ranges. Other measurement ranges are
possible.

Microx User Manual
Rev. 1.2
V233P
Page 7
2 SPECIFICATION
Supply
Input Voltage
Options:
24V DC nominal.(Good quality power supply)
110-240VAC Panel and Wall mount versions only.
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)
Current Source.
Relays (Optional)
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
Dimensions:
See the appropriate diagram on page 7 this
manual.
IP Rating
IP20. Wall mount version is IP65.
Terminals
capacities:
0.2-4.0mm Solid wire
0.2-2.5mm Stranded wire
Software:
Software configuration, calibration and data
logging provided by PC communications.
RS232 Output
Communications with PC @ 19200 baud.

Microx User Manual
Rev. 1.2
V233P
Page 8
3 MICROX MODULE
3.2 Fuses
A 500mA Anti-surge fuse is fitted to the OEM module, which is connected
between the power supply and the OEM module. It is located next to the
power input terminals.
3.3 Mounting Options
Din Rail Mounting Version.
Overall dimensions:
86mm(H) x 69mm(W) x
58mm(D).
Panel Mounting Version.
Overall dimensions:
96mm(H) x 96mm(W) x
83mm(D).
(including connection Terminals)
Panel cut-out dimensions
91mm(H) x 91mm(W)
Wall Mounting Version
Overall dimensions:
145mm(H) x 110mm(W) x 93mm(D).
(including Cable Glands)

Microx User Manual
Rev. 1.2
V233P
Page 9
3.4 Field Connections
All connections to the module are provided in the form of screw terminals.
The pin- outs for each Microx version are given below.
Din Rail Mounting version.
View ‘A’
Note:Terminals 1,2 & 3 are for the connection of Electro-Chemical %
and Zirconia % or ppm Sensors.
Terminals 4 & 5 are for the connection of Electro-Chemical ppm
Sensors only. See Sensor for connection details. For Zirconia
Sensors, connect the sensor power wires (+ & -) into terminals 14 and
13 of the Analyser along with the Analyser power wiring.
Electrical Interface
Terminals/connections as per view ‘A’

Microx User Manual
Rev. 1.2
V233P
Page 10
Panel and Wall Mount Versions - DC Supply option.
(Terminals located at the rear of the Module, identified as below
as viewed)
View ‘A’
Note:Terminals 1,2 & 3 are for the connection of Electro-Chemical %
and Zirconia % or ppm Sensors.
Terminals 4 & 5 are for the connection of Electro-Chemical ppm Sensors
only. See Sensor for connection details. For Zirconia Sensors, connect
the sensor power wires (+ & -) into terminals 14 and 13 of the Analyser
along with the Analyser power wiring.
Electrical Interface
Terminals/connections as per view ‘A’
No Connection
Supply by Customer
0V
24V
Note: Additional Terminals fitted on Wall
Mount DC version with Zirconia Sensor.