Michell Instruments XTP601 Operating Manual
XTP601
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2
Process Oxygen Analyzer
User’s Manual
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97313 Issue 5.1
July 2018
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XTP601
For Michell Instruments' contact information please go to
www.michell.com
© 2018 Michell Instruments
This document is the property of Michell Instruments Ltd. and may not be copied or
otherwise reproduced, communicated in any way to third parties, nor stored in any Data
Processing System without the express written authorization of Michell Instruments Ltd.
XTP601 User’s Manual
Contents
Safety ...............................................................................................................................vii
Electrical Safety ..........................................................................................................vii
Pressure Safety ........................................................................................................... vii
Temperature Safety .....................................................................................................vii
Toxic Materials ............................................................................................................vii
Repair and Maintenance ..............................................................................................vii
Calibration .................................................................................................................. vii
Safety Conformity .......................................................................................................vii
Equipment Ratings ...................................................................................................... vii
Abbreviations .................................................................................................................... viii
Warnings .......................................................................................................................... viii
1 INTRODUCTION ................................................................................................1
1.1 Features ............................................................................................................ 2
1.2 Applications ....................................................................................................... 3
1.3 O-Ring Selection ................................................................................................. 3
2 OPERATION ......................................................................................................4
2.1 Preparation ........................................................................................................ 4
2.2 Powering up the Analyzer .................................................................................... 5
2.3 User Interface .................................................................................................... 6
2.3.1 Interface Controls ......................................................................................... 6
2.3.2 ‘ESC’ Button .................................................................................................. 7
2.3.3 ‘Up/Down Arrow’ Buttons ............................................................................... 7
2.3.4 ‘ENTER’ Button ............................................................................................. 7
2.4 Menu Structure .................................................................................................. 8
2.4.1 Menu Map .................................................................................................... 9
2.5 Front Pages (No passcode Required) .................................................................... 9
2.5.1 Main Page .................................................................................................. 10
2.5.2 Chart Page ................................................................................................ 11
2.5.3 Secondary Parameters Page ......................................................................... 12
2.5.4 O2 Min/Max Page ....................................................................................... 12
2.5.5 Alarms Log Pages ....................................................................................... 13
2.6 Info Page ........................................................................................................ 13
2.7 User Set-Up Variables (Passcode Required) ........................................................ 14
2.7.1 Settings Page .............................................................................................. 15
2.7.2 Human Machine Interface (HMI) Page .......................................................... 16
2.7.3 Clock Page .................................................................................................. 16
2.7.4 Reset Page ................................................................................................. 17
2.7.5 Outputs Page .............................................................................................. 17
2.7.6 External Compensation Page ........................................................................ 18
2.7.7 External Sensor Page .................................................................................. 19
2.7.8 Field Cal Page ............................................................................................. 20
2.7.9 Light Guide Option ...................................................................................... 21
3 CALIBRATION ..................................................................................................22
3.1 1 Point Calibration ............................................................................................ 23
3.2 2 Point Calibration ........................................................................................... 24
3.3 Field Calibration Reset ...................................................................................... 25
4 INSTALLATION ................................................................................................26
4.1 Unpacking ........................................................................................................ 27
4.2 System Components ......................................................................................... 28
4.3 Set-Up ............................................................................................................. 29
iv 97313 Issue 5, May 2018
XTP601 User’s Manual
4.4 Mechanical Installation ...................................................................................... 30
4.4.1 Gas Connection ........................................................................................... 30
4.4.2 Sample Gas Requirements ........................................................................... 30
4.4.3 Calibration Gases ........................................................................................ 31
4.5 Electrical Installation ......................................................................................... 31
4.5.1 Power Supply and Input/Output Signal ......................................................... 31
4.5.2 Power Supply (PL9 - Green) ........................................................................ 31
4.5.3 Signal Output ............................................................................................. 32
4.5.4 Serial Output .............................................................................................. 32
4.5.5 Analog (4-20 mA) Outputs and Communications (PL5 - Green) ....................... 32
4.5.6 Alarm Relay Contacts (PL1- Black) ................................................................ 33
4.5.7 Analog (4-20 mA) Inputs and Sensor Excitation Voltage (PL4 - Green) ............ 33
4.5.8 Light Guide ................................................................................................. 34
Figures
Figure 1 XPT601 Oxygen Analyzer Versions ..............................................................1
Figure 2 Initializing Screen .......................................................................................5
Figure 3 Main Page ..................................................................................................5
Figure 4 User Interface ............................................................................................6
Figure 5 XTP600 Series Application Software .............................................................6
Figure 6 ESC Button ................................................................................................7
Figure 7 Up/Down Arrow Buttons .............................................................................7
Figure 8 ENTER Button ............................................................................................7
Figure 9 Menu Map ..................................................................................................9
Figure 10 Main Page ................................................................................................10
Figure 11 Chart Page ...............................................................................................11
Figure 12 Secondary Parameters Page ......................................................................12
Figure 13 O2 Min/Max Page ..................................................................................... 12
Figure 14 Alarms Log Page ......................................................................................13
Figure 15 Info Page .................................................................................................13
Figure 16 User Set-Up Variables Page .......................................................................14
Figure 17 Settings Page ...........................................................................................15
Figure 18 HMI Page .................................................................................................16
Figure 19 Clock Page ...............................................................................................16
Figure 20 Reset Page ...............................................................................................17
Figure 21 Outputs Page ...........................................................................................17
Figure 22 External Compensation Page .....................................................................18
Figure 23 External Sensor Page ................................................................................19
Figure 25 Field Cal Page .......................................................................................... 20
Figure 26 1 Point Calibration Page ............................................................................23
Figure 27 2 Point Calibration Page ............................................................................24
Figure 28 Field Calibration Reset Page ......................................................................25
Figure 29 XTP601 Cutaway Showing Major Components ............................................28
Figure 30 XTP601 Lid Removal .................................................................................29
Figure 31 XTP601 Cable Entries ................................................................................30
Figure 32 Terminal Block Locations ...........................................................................31
Figure 33 XTP601 Dimensional Drawings ..................................................................38
Michell Instruments v
XTP601 User’s Manual
Appendices
Appendix A Technical Specifications ............................................................................. 36
A.1 Dimensions Ex version ................................................................ 38
Appendix B Modbus Register Map ...............................................................................40
Appendix C Hazardous Area Certification .....................................................................47
C.1 Product Standards ...................................................................... 47
C.2 Product Certifi cation ................................................................... 47
C.3 Global Certifi cates/Approvals ....................................................... 47
C.4 Special Conditions....................................................................... 47
C.5 Maintenance and Installation ....................................................... 48
Appendix D Quality, Recycling, Compliance & Warranty Information ............................... 50
Appendix E Analyzer Return Document & Decontamination Declaration .........................52
vi 97313 Issue 5, May 2018
XTP601 User’s Manual
Safety
The manufacturer has designed this equipment to be safe when operated using the procedures
detailed in this manual. The user must not use this equipment for any other purpose than that
stated. Do not apply values greater than the maximum value stated.
This manual contains operating and safety instructions, which must be followed to ensure the safe
operation and to maintain the equipment in a safe condition. The safety instructions are either
warnings or cautions issued to protect the user and the equipment from injury or damage. Use
qualified personnel and good engineering practice for all procedures in this manual.
Electrical Safety
The instrument is designed to be completely safe when used with options and accessories supplied
by the manufacturer for use with the instrument. The input power supply voltage is 24 V DC, 1.5 A
(max). Refer to labels on the instrument or calibration certificate.
Pressure Safety
DO NOT permit pressures greater than the safe working pressure to be applied to the instrument.
The specified safe working pressure for this instrument is 3 barg (43 psig) max.
Temperature Safety
During operation some parts of the instrument may be at high temperature.
Toxic Materials
The use of hazardous materials in the construction of this instrument has been minimized. During
normal operation it is not possible for the user to come into contact with any hazardous substance
which might be employed in the construction of the instrument. Care should, however, be exercised
during maintenance and the disposal of certain parts.
Long exposure to, or breathing of the calibration gases, may be dangerous.
Repair and Maintenance
The instrument must be maintained either by the manufacturer or an accredited service agent. For
Michell Instruments’ worldwide offices contact information go to www.michell.com.
Calibration
The recommended calibration interval for the analyzer is 3 months. Depending on the application in
which the instrument is used, the calibration interval may be reduced. Please consult the factory for
the specific calibration interval.
Safety Conformity
This product carries the CE mark and meets the requirements of relevant European safety directives.
Equipment Ratings
This equipment must be supplied with a voltage of 24 V DC, 1.5 A (36 W).
The power is connected via PL9 on the mother board (see Section 4.5).
All input and output connectors are 2-part pcb mounted type.
The detachable, screw terminal half of each connector is designed to accept 24 -12 AWG stranded
or solid conductors.
Michell Instruments vii
Abbreviations
The following abbreviations are used in this manual:
A Ampere
AC alternating current
bara pressure in bar (absolute)
barg pressure in bar (gauge)
°C degrees Celsius
°F degrees Fahrenheit
DC direct current
kg kilogram
kPa Kilopascal
lb pound
max maximum
mA milliampere
ml/min milliliters per minute
mm millimeters
ppm parts per million
psig pounds per square inch
scfh standard cubic feet per hour
V Volt
" inches
ohm
XTP601 User’s Manual
Warnings
The following general warnings listed below are applicable to this instrument. They are
repeated in the text in the appropriate locations.
Where this symbol appears in the following sections it
is used to indicate areas where potentially hazardous
operations need to be carried out.
THESE TASKS SHOULD BE UNDERTAKEN BY QUALIFIED
PERSONNEL ONLY.
Where this symbol appears in the following sections it is
used to indicate areas of potential risk of electric shock.
NOTE: Warnings and important notifications are marked with bold text.
viii 97313 Issue 5, May 2018
XTP601 User’s Manual
1 INTRODUCTION
This manual will show how to measure oxygen easily using the XTP601 Oxygen Analyzer.
The following sections contain information about:
• Analyzer components
• Operating instructions
• Calibration and maintenance of the Analyzer
• Installation
Please read this manual carefully and pay special attention to the safety warnings and
notifications.
NOTE: Warnings and important notifications are marked with bold text.
The 3 versions of the XTP601 available are shown below:
INTRODUCTION
The 5 versions of the XTP601 available as described below:
GP1, GP2 or EX1
Analyzer with touch screen
(capacitive buttons)
Figure 1
The XTP601 Oxygen Analyzer is based on Michell Instruments’ advanced proprietary
Thermo-Paramagnetic technology. It measures the percentage of oxygen in a wide
range of gases, including nitrogen, hydrogen, carbon dioxide methane and biogas.
The sensor is housed in a weather-proof (GP version) or explosion-proof (EX version)
casing - both IP66 & NEMA 4X rated. It is suitable for a range of applications in safe or
hazardous areas.
XPT601 Oxygen Analyzer Versions
GP3 or EX3
Oxygen transmitter
EX1, EX3 and GP2 models are supplied with flame arrestors for use with flammable
gases or in hazardous areas.
NOTE: this manual relates to products with firmware version V1.07.
Michell Instruments 1
INTRODUCTION
1.1 Features
• There are 2 versions of the XTP601 available:
• The XTP601 is calibrated in a specific background gas to match
customer's requirements. This is displayed on the front screen of the
analyzer or via the Application Software.
• The XTP601 provides 2 off 4-20 mA analog output signals that are
proportional to the oxygen concentration. The primary 4-20 mA output
is locked on the calibrated range of the instrument. The secondary
output is user-selectable within the calibrated range.
• Modbus RTU over RS485 protocol serial communications are provided
as standard.
XTP601 User’s Manual
Analyzer with touch screen (capacitive buttons)
Transmitter (base model)
• Accuracy of 1% FS or 0.02% O
ranges ±0.2% O2).
• Zero and span stability of 0.25% of span per month.
• The Thermo-Paramagnetic sensor used in the XTP601 Oxygen Analyzer
has no moving parts. This makes it less sensitive to vibration and
movement and highly resistant to drift over a long period of time,
compared to other sensing technologies.
• Innovative sensor design which minimizes zero drift and offers
increased protection against contamination.
• The robust and weather-proof enclosure (IP66 rated) allows the XTP601
to be installed on-site, at the point of measurement. It is also available
with an explosion-proof casing and certified to II 2 GD Ex d IIB+H2 T6
Gb, Ex tb IIIC T85°C Db IP66 T amb -40°C to +55°C. (Dependant on
O-Ring selection, see Section 1.3.)
• All of the analyzer functions can be accessed via the touch screen
(capacitive) buttons (on display model), or via the Application Software.
• Low cost of ownership due to minimal maintenance. When required,
the casing unscrews to allow for easy access to the sensor, enabling
maintenance to be carried out quickly and easily.
, whichever is greater. (Zero suppressed
2
• The XTP601 is certified to ATEX, IECEX, cCSAus, INMETRO & TC TR Ex
for use in hazardous areas.
• 2 x single pole change-over relay alarms for oxygen concentration,
supplied as standard. Can be configured as OFF, LOW or HIGH on the
analyzer (GP1 or EX1) version or LOW or HIGH on the transmitter (GP3
or EX3) version.
2 97313 Issue 5, May 2018
XTP601 User’s Manual
1.2 Applications
The XTP601 has a robust sensor with high sensitivity and stability. It can be factorycalibrated in varying backgrounds to match the customer’s process gas. The analyzer
has a built-in local user interface with a display. The capacitive buttons work through
the glass face, without needing to remove the lid.
Together with the purpose designed sampling system, the XTP601 is able to work under
various process and environmental conditions. Examples of applications include:
• Monitoring inert blanketing gases
• Oxygen measurement at inlet of compressors in steel or gas industries
for safety
• Biogas, waste, landfill and digester plants
• Inert gas for pharmaceutical industry and painting gas
INTRODUCTION
• Catalyst regeneration
1.3 O-Ring Selection
The XTP601 is available with 3 types of O-rings to offer greater flexibility with material
compatibility. The Viton O-ring is fitted as standard. The EKRAZ O-ring is available for
solvent resistance. For extremely low temperatures there is a closed cell Silicone O-ring.
To comply with Hazardous Area certification, the material used in the EX1 & EX3 versions
is dependent on the lowest ambient temperature of the area the units are to be installed
in:
Ambient operating range:
-40°C to +55°C (-40°F to +131°F) (for Silicone version)
-15°C to +55°C (5°F to +131°F) (for Viton version) - Standard
-10°C to +55°C (14°F to +131°F) (for Ekraz version)
NOTE: Silicone O-ring is not suitable for oxygen enriched samples,
i.e. 0
> 21%.
2
Michell Instruments 3
OPERATION
2 OPERATION
This analyzer has been manufactured within our quality procedures and is configured
according to the purchase order. When it is installed and used as per the manufacturer’s
guidelines, it will operate within the stated specification.
Before starting operation it is recommended that the user becomes familiar with this
manual in which all the equipment controls, indicators, the elements of the display and
the overall menu structure are described.
XTP601 User’s Manual
The XTC601 is not certifi ed for use with ambient oxygen
levels that are enriched (i.e. over 21% O2)
2.1 Preparation
Zero and Span gas cylinders with correct regulation and flow control should be in place
before installing and powering up the analyzer. Commissioning should include a check
with both gases and, if necessary, a field calibration performed.
All analyzers will be calibrated with an inlet pressure of 1 barg (14 psig) with an
atmospheric vent and flow rate of 300 ml/min (0.63 scfh). The calibration gas applied
to the analyzer should be at the same pressure and flow rate as the process gas being
sampled.
Sample Inlet Pressure:
• 0 to 4 barg (0 to 58 psig)
Before applying power and beginning the fl ow of gas,
please ensure that the system has been properly installed
following the instructions in Section 4.
Check that the wiring has been completed correctly.
Sample Flow Rate:
GP1 & GP3 models: 100 to 500 ml/min (0.2 to 1.06 scfh)
EX1, EX3 & GP2 Models: 270 - 330ml/min (0.54 to 0.66 scfh)
4 97313 Issue 5, May 2018
XTP601 User’s Manual
2.2 Powering up the Analyzer
After all the preparation work is done and the installation
and wiring have been checked, turn on the analyzer and
wait for at least 30 minutes (or until
message disappears). This will allow the analyzer to
reach its operating temperature of +50°C (or +60°C if
higher temperature cell is chosen) and protect it from any
There is no power switch on the XTP601 Oxygen Analyzer. It is turned on automatically
once a 24 V DC power source is applied. After the analyzer is powered up, the display
will be illuminated. The analyzer takes up to 5 seconds to initialize, and during this
period will display the product type and firmware version number.
OPERATION
Cell T Not Stable
condensation forming in the sensor.
Cell Temperature
Indication
Oxygen
Concentration
Status Bar
Figure 2
j j j
Back. Gas: N2
5.23 % 02
Cell T Not Stable
Figure 3
XTP601
Ver. *.**
Initializing Screen
Main Page
Cell Heating
j
Symbol
Once initialized, the analyzer will show the Main Page which displays the O2 concentration.
During warm-up (less than 25 minutes) a heating symbol will flash in the top right
hand corner of the page. This symbol will remain until the temperature has stabilized
for a minimum of 5 minutes. The analyzer will be ready for use within 30 minutes from
power-up.
Michell Instruments 5
OPERATION
2.3 User Interface
2.3.1 Interface Controls
XTP601-EX1
Oxygen Analyzer
XTP601 User’s Manual
j
Backlit LCD
ESC
j
ESC
Button
Figure 4
j
Up/Down
Arrow
Buttons
j
ENTER
j
j
ENTER
Button
User Interface
Blue LEDs
The diagram above illustrates the user interface, which consists of a backlit Liquid
Crystal Display and 4 touch-sensitive pads that facilitate user interaction through the
glass of the enclosure.
All versions have Application Software to monitor or adjust parameters. Application
software will require a PC or laptop with comm port connection. If using RS232 serial
port ensure that an isolated RS232 to RS485 converter is used.
Figure 5
XTP600 Series Application Software
6 97313 Issue 5, May 2018
XTP601 User’s Manual
2.3.2 ‘ESC’ Button
OPERATION
ESC
The ESC button is used to exit the current menu and to return to the previous menu.
From the Main Page, pressing
2.3.3 ‘Up/Down Arrow’ Buttons
Figure 7
The Up () and Down () buttons are used to change pages, scroll through lists and
adjust values. In the Reset and Field Calibration Menus, pressing the
3 times will confirm a selection.
Figure 6
ESC Button
ESC will access the Info Page.
Up/Down Arrow Buttons
Up () button
2.3.4 ‘ENTER’ Button
ENTER
Figure 8
The ENTER button is used to select or de-select the highlighted item in a menu and to
confirm a value. From the Main Page, pressing
ENTER Button
ENTER will access the Passcode Page.
Michell Instruments 7
OPERATION
2.4 Menu Structure
The EX1 and GP1 versions of the XTP601 have front pages that do not require a passcode
but allow the user to scroll through and view oxygen concentration, recent trend, internal
parameters, minimum & maximum oxygen concentration and alarm history.
In order to change any settings on the User Menu pages, the user must enter a passcode.
There is also a separate passcode for service engineers to allow factory setting changes.
XTP601 User’s Manual
To access the User Menu press the
passcode prompt. Use the
value.
The User Passcode is:
From the Main Page the user can press the ESC button to view the Info Page. This page
shows the firmware version, hours used, last calibration date, calibration pressure and
the received Modbus code.
The user will be able to set up and access all functions of the transmitter versions
via the Application Software supplied. The passcode is the same as the EX1 and GP1
versions (
The passcode is stored for one minute to allow access back into the User Menu, if
necessary.
1919). The Application Software will be supplied on a CD with the unit.
Up () and Down () buttons and press ENTER after each
1919
ENTER button from the Main Page to call up a
8 97313 Issue 5, May 2018
XTP601 User’s Manual
2.4.1 Menu Map
OPERATION
125
04:08:11
1000.0
1.0
---
ESC
Firmware Ver
Hours Used
Last Cal Date
h
Cal Press. mB
ModBus Rx Code
USER MENU
XTP601
Ver: *.**
INT. SCREEN
j
SETTINGS
HMI
RESET
OUTPUTS
FIELD CAL
PRESS COMP
EXT COMP
HSR
LIMIT 0-100%
h
MODBUS ID
CONTRAST
BRIGHTNESS
TEMPR UNIT
EXT PRESS UNIT
CHART INTVAL
DATE
O2 MIN/MAX
FIELD CAL
AL1 SETP
AL2 SETP
CH2 OUT ZERO
CH2 OUT SPAN
AL1 CONFIG
AL2 CONFIG
COMP 20%
COMP 40%
COMP 60%
COMP 80%
COMP 100%
EXT.SENS PV
EXT.SENS MIN
EXT.SENS MAX
UNIT
HOURS
MINS
DAY
MONTH
YEAR
LIVE CLOCK
CAL TYPE
REF GAS 1
ACTUAL 1
REF GAS 2
ACTUAL 2
Adjusted ~
ENTER
EXT COMP.
EXT SENS.
CLOCK
FIELD CAL
USER MENU
ON/OFF
ON/OFF
ON/OFF
ON/OFF
ON/OFF
1-127
SETTINGS
O-100%
O-100%
C/F/K
psia, bara, kpa
2-60s
US/Non US
HMI
RESET
0.00-100.00%
0.00-100.00%
0.00-100.00%
0.00-100.00%
OFF/LOW/HIGH
OFF/LOW/HIGH
OUTPUTS
EXT COMP
tempr
-50.0
100.0
ºC
EXT SENS
00-23
00-59
1-31
1-12
00-99
**:**:**
RTC
1/2 POINT
0.00-100.00
0.00-100.00
0.00-100.00
0.00-100.00
**.**
FIELD CAL
RESET?
DELETE?ALARM LOGS
DELETE?
0.50-2.00
0.50-2.00
0.50-2.00
0.50-2.00
0.50-2.00
Passcode
1919
j
Back.Gas: N2
h
5.23 % 02
Cell T Not Stable
25
ESC
%
0
CELL T, °C 50.0
PCB Temp,
COMP I/P OFF
EXT I/P OFF
MINIMUM 0.00 %02
D12/01 T 19:29:44
MAXIMUM 0.00 %02
D12/01 T 19:29:44
ALARM DATE TIME P1
LOW 02/01 12:50:40
HIGH 02/01 11:10:32
LOW 02/01 11:00:29
HIGH 02/01 10:20:00
or
t-4
°C
28
ALARM DATE TIME P1
LOW 02/01 12:50:40
HIGH 02/01 11:10:32
LOW 02/01 11:00:29
HIGH 02/01 10:20:00
FRONT PAGES
ENTER
t
or
or
or
j
j
Enter PassCode
0 0 0 0
PASSCODE PAGE
USER SETUP PAGES
Figure 9
Menu Map
2.5 Front Pages (No passcode Required)
The EX1 and GP1 versions of the XTP601 have 5 front pages that the user can display
without t he need for a passcode. NOTE: These are for display of information only
and there is no way of adjusting any settings on these pages.
From the Main Page (O
using the
Down () button. To return to the Main Page, either press the Up () button
the required amount of times or press the
concentration) the rest of the front pages can be accessed
2
ESC button.
Michell Instruments 9
OPERATION
2.5.1 Main Page
XTP601 User’s Manual
Back. Gas: N2
20.91 % 02
Cell T Not Stable
Figure 10
Main Page
Parameter Description
Background Gas
% O2
(if HSR=OFF)
% O2p
(if HSR = ON)
Flashing “Heating”
Symbol
Status Bar Flashes any system warnings and error messages (see below)
Status Message Table
Message
(Trigger Condition)
% O2 out of range
(beyond calibration range, e.g. 0-25%)
AL1 ON
AL2 ON
Comp i/p signal error
(input < 3.6 mA or > 21 mA)
Ext sens signal error
(input < 3.6 mA or > 21 mA)
Cell T not stable
(not within ±0.5ºC of set point for continuous period
of 5 minutes)
Cell T sensor error
(cell temp measures <-50 or >+80ºC)
Press sensor error
(pressure sensor < 850 or >1100 mbar)
O2 sensor error
(Vcomp <1 or >8191)
PCB temp too high
(PCB temp > cell temp set point)
Displays the background gas that the unit was calibrated in
Real oxygen reading in %
Display resolution = 0.01
(Display resolution 0.1% when min value is >=20%)
HSR oxygen reading (extrapolated quick response value of real
oxygen reading)
Real oxygen value is displayed in status bar
This flashes until cell temperature is stable at set point ±0.5°C for
minimum of 5 minutes
Light Guide
(if fitted)
N/A
ORANGE1 ON (app s/w only)
ORANGE2 ON (app s/w only)
RED FLASH
(priority2)
RED FLASH
(priority2)
RED ON
(priority1)
RED ON
(priority1)
RED ON
(priority1)
RED ON
(priority1)
RED ON
(priority1)
10 97313 Issue 5, May 2018
XTP601 User’s Manual
2.5.2 Chart Page
25
%
0
t-4
OPERATION
t
Figure 11
Chart Page
NOTE: This data is not available via the Modbus
• This indicative chart is continuously running at the set chart interval (2
to 60 seconds).
• Chart duration in seconds = (chart interval * 60).
• It is auto ranging with an auto range resolution of 1% O
.
2
• It is reset if the chart interval is changed, the Display is changed between
% O
and % O
2
• The chart will record either % O
HSR or the instrument power is cycled.
2
(Non HSR) or % O2 HSR if this is set to
2
ON in the setup pages.
• Chart buffer size is 60 values and therefore the chart duration changes
according to interval chosen.
• Chart data is only stored in volatile memory and therefore is not saved.
Chart interval is saved and available in a Modbus register.
• Chart data is not available via serial comms as the Application Software is
able to perform more sophisticated charting functions.
Michell Instruments 11
OPERATION
2.5.3 Secondary Parameters Page
CELL T, °C 50.0
PCB TEMP, C 28
COMP I/P OFF
EXT I/P OFF
XTP601 User’s Manual
Parameter Description
CELL T
PCB TEMP
COMP I/P
Sensor cell temperature display in set unit (°C, °F or Kelvin)
Display Resolution = 0.1
Temperature display of Microcontroller in selected temperature unit
This gives an indication of the internal GUB temperature
Display Resolution = 1 unit
Accuracy = ±2ºC
The value of compensation input (mA i/p channel 1) as a %
(4 mA=0% and 20 mA=100%)
OFF displayed instead of value if external compensation is turned off
Value of the external input in the selected parameter and unit
EXT I/P
2.5.4 O2 Min/Max Page
(DEWP, TEMPR, PRESS or NONE)
OFF displayed instead of value if external compensation parameter is set
NONE
to
Figure 12
Secondary Parameters Page
MINIMUM 0.00 %02
D12/01 T 19:29:44
MAXIMUM 0.00 %02
D12/01 T 19:29:44
Figure 13
This indicates the minimum and maximum O2 values measured, along with date/
time of occurrence. The value is reset manually via the Reset Page in the User Menu.
NOTE: This data is not saved in NV memory and is not available via serial
communications or in the blind unit.
O2 Min/Max Page
12 97313 Issue 5, May 2018
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