Michell Instruments S8000 Operating Manual
S8000
Chilled Mirror Hygrometer
User’s Manual
97488 Issue 4
August 2018
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S8000
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© 2018 Michell Instruments
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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.
S8000 User’s Manual
Contents
Safety ................................................................................................................................ix
Electrical Safety ...........................................................................................................ix
Pressure Safety ............................................................................................................ix
Toxic Materials .............................................................................................................ix
Repair and Maintenance ...............................................................................................ix
Calibration ...................................................................................................................ix
Safety Conformity ........................................................................................................ix
Abbreviations ...................................................................................................................... x
Warnings ............................................................................................................................ x
1 INTRODUCTION ................................................................................................1
1.1 Operating Principle ............................................................................................. 2
2 INSTALLATION ..................................................................................................3
2.1 Safety ................................................................................................................ 3
2.2 Unpacking the Instrument ................................................................................... 3
2.3 Operating Requirements ..................................................................................... 5
2.3.1 Environmental Requirements ......................................................................... 5
2.3.2 Electrical Requirements ................................................................................. 5
2.4 Exterior Layout ................................................................................................... 5
2.5 Rear Panel Connections (All Versions) .................................................................. 8
2.5.1 Power Supply Input ....................................................................................... 9
2.5.2 Analog Output Connections .......................................................................... 10
2.5.3 Alarm Output Connections ........................................................................... 11
2.5.4 Remote PRT Probe (Optional) ..................................................................... 13
2.5.5 4-Wire PRT Output (Optional) ...................................................................... 14
2.5.6 USB Communications Port Connector ............................................................ 14
2.5.7 Ethernet Port (Optional) .............................................................................. 15
2.5.8 RS232/485 Port (Optional) ........................................................................... 15
2.5.9 Connection of Gas Supplies .......................................................................... 17
2.6 Internal Sample Pump (Optional) ....................................................................... 19
2.7 Conversion of S8000 to Rack Mount .................................................................. 20
3 OPERATION ....................................................................................................21
3.1 General Operational Information ........................................................................ 21
3.2 Instrument Display ........................................................................................... 22
3.2.1 Main Screen ................................................................................................ 23
3.2.2 Customizable Readouts................................................................................ 24
3.2.3 Operational Status Display ........................................................................... 24
3.2.4 Setup Menu Screen ..................................................................................... 25
3.2.5 Menu Structure .......................................................................................... 27
3.2.6 DCC ........................................................................................................... 28
3.2.7 LOGGING ................................................................................................... 29
3.2.8 OUTPUTS ................................................................................................... 31
3.2.9 ALARM ....................................................................................................... 31
3.2.10 DISPLAY .................................................................................................... 32
3.2.11 CLOCK ....................................................................................................... 33
3.2.12 ABOUT (Network Settings) ........................................................................... 33
3.3 Operational Functions ....................................................................................... 34
3.3.1 Operating Cycle .......................................................................................... 34
3.4 Operating Guide ............................................................................................... 35
3.4.1 DCC - Dynamic Contamination Control .......................................................... 35
3.4.2 MAXCOOL Function ..................................................................................... 36
3.4.3 Pressure Compensation ............................................................................... 36
iv 97488 Issue 4, August 2018
S8000 User’s Manual
3.4.4 Data Logging .............................................................................................. 36
3.4.5 Frost Assurance System Technology (FAST) .................................................. 37
3.4.6 STANDBY Mode........................................................................................... 37
4 APPLICATION SOFTWARE ................................................................................38
4.1 Installation ....................................................................................................... 38
4.2 Establishing Communications ............................................................................ 38
4.2.1 USB Communication .................................................................................... 39
4.2.2 RS232/485 Communication .......................................................................... 40
4.2.3 Ethernet Communication ............................................................................. 40
4.3 Data Acquisition or Edit Variables Mode .............................................................. 41
4.3.1 Data Acquisition .......................................................................................... 42
4.3.2 Variable Edit ............................................................................................... 44
5 MAINTENANCE ................................................................................................46
5.1 Safety .............................................................................................................. 46
5.2 Fuse Replacement ........................................................................................... 47
5.3 Sensor Mirror Cleaning ...................................................................................... 48
5.3.1 Releasing optics window ............................................................................. 49
5.3.2 Fitting the Microscope (Optional) .................................................................. 50
6 GOOD MEASUREMENT PRACTICE .....................................................................51
6.1 Sampling Hints ................................................................................................. 52
7 CALIBRATION ..................................................................................................55
7.1 Traceability ...................................................................................................... 55
8 PREPARATION FOR SHIPPING ..........................................................................56
Michell Instruments v
S8000 User’s Manual
Tables
Table 1 Front Panel Controls and Indicators ..............................................................6
Table 2 Rear Panel Controls and Indicators ...............................................................8
Table 3 Main Screen Description ............................................................................. 23
Table 4 Operational Status Display ........................................................................24
Table 5 DCC Parameters ........................................................................................28
Table 6 Logging Parameters ................................................................................... 29
Table 7 SD Card Status Indicators .......................................................................... 30
Table 8 Outputs Parameters ................................................................................... 31
Table 9 Alarm Parameters ...................................................................................... 31
Table 10 Display Parameters .................................................................................... 32
Table 11 Clock Parameters .......................................................................................33
Table 12 Network Parameters .................................................................................. 33
Table 13 Data Acquisition Control Description ...........................................................42
Table 14 Graph Control Description .......................................................................... 43
Table 15 Status Bar Description ...............................................................................43
Table 16 Modbus Holding Register Map ....................................................................69
Table 17 Register Confi guration A ............................................................................ 70
Table 18 Register Confi guration B1 ...........................................................................70
Table 19 Register Confi guration B2 ...........................................................................70
Table 20 Register Confi guration D Status Word ......................................................... 71
Table 21 Register Confi guration E Units ....................................................................71
Table 22 Register Confi guration F Display Setting A ...................................................71
Table 23 Register Confi guration F Display Setting B ................................................... 72
Table 24 Register Confi guration H ............................................................................72
Table 25 Register Confi guration J .............................................................................72
Table 26 Register Confi guration K ............................................................................ 72
Table 27 Register Confi guration L .............................................................................73
Table 28 Register Confi guration M ............................................................................ 73
Table 29 Register Confi guration N ............................................................................73
Table 30 Register Confi guration P ............................................................................. 74
vi 97488 Issue 4, August 2018
S8000 User’s Manual
Figures
Figure 1 S8000 ........................................................................................................1
Figure 2 Operating Principle .....................................................................................2
Figure 3 S8000 Packing ............................................................................................3
Figure 4 Front Panel ................................................................................................6
Figure 5 Rear Panel .................................................................................................7
Figure 6 Power Supply Input ....................................................................................9
Figure 7 Analog Output Connectors ........................................................................10
Figure 8 Alarm Output Connectors ..........................................................................12
Figure 9 Remote PRT Connection ............................................................................13
Figure 10 Internal PRT Output (Optional) ..................................................................14
Figure 11 USB Port Connection .................................................................................14
Figure 12 Ethernet Port (Optional) ............................................................................15
Figure 13 RS232/485 Port (Optional) ........................................................................15
Figure 14 Gas Connections .......................................................................................17
Figure 15 Gas Connections when Pump is Fitted ........................................................ 19
Figure 16 Rack Fixing Method ..................................................................................20
Figure 17 Initialising Overlay Screen .........................................................................22
Figure 18 Main Screen .............................................................................................22
Figure 19 Main Screen Layout ..................................................................................23
Figure 20 Setup Menu Screen ..................................................................................25
Figure 21 Virtual Keyboard ...................................................................................... 26
Figure 22 Menu Structure ........................................................................................27
Figure 23 DCC Screen .............................................................................................. 28
Figure 24 Logging Screen ........................................................................................29
Figure 25 Outputs Screen ........................................................................................31
Figure 26 Alarm Screen ...........................................................................................31
Figure 27 Display Screen .........................................................................................32
Figure 28 Clock Screen ............................................................................................33
Figure 29 Network Settings Screen ...........................................................................33
Figure 30 Typical Operating Cycle .............................................................................34
Figure 31 Communications Setup Screen ..................................................................38
Figure 32 Windows Device Manager Screen ..............................................................39
Figure 33 Network Settings Screen ...........................................................................40
Figure 34 Options Screen .........................................................................................41
Figure 35 Data Acquisition Screen ............................................................................42
Figure 36 Variables Editor Screen .............................................................................45
Figure 37 Power Supply Fuse Replacement ...............................................................47
Figure 38 Sensor Mirror Cleaning ..............................................................................48
Figure 39 Releasing Optics Window ..........................................................................49
Figure 40 Fitting the Microscope ...............................................................................50
Figure 41 Typical Calibration Certifi cate ..................................................................... 55
Figure 42 Instrument Packing Details ........................................................................56
Figure 43 Select Format ...........................................................................................62
Figure 44 Set Format Properties ...............................................................................62
Figure 45 Format Disc .............................................................................................62
Figure 46 Modbus Connection ..................................................................................67
Michell Instruments vii
S8000 User’s Manual
Appendices
Appendix A Technical Specifi cations .............................................................................. 58
A.1 Dimensions ................................................................................. 60
Appendix B Formatting SD cards ................................................................................. 62
Appendix C Calculations ..............................................................................................64
C.1 Water Content ............................................................................. 64
C.2 Temperature - Dew Point ...........................................................64
C.3 °C to °F Calculation .................................................................... 64
C.4 % RH Calculation ........................................................................64
C.5 Conversion of bara to psia and kPa .............................................. 65
Appendix D Modbus RTU Communications ....................................................................67
D.1 Introduction ............................................................................... 67
D.2 Basic Modbus Operation .............................................................. 67
D.3 Modbus RTU Connections and Protocol .......................................... 68
D.4 Register Map .............................................................................. 68
Appendix E Default Values ........................................................................................... 76
Appendix F Quality, Recycling & Warranty Information ................................................... 78
Appendix G Return Document & Decontamination Declaration ........................................ 80
viii 97488 Issue 4, August 2018
S8000 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
qualifi ed 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 limits are 85 to
264 V AC, 47/63 Hz. Refer to Appendix A - Technical Specifi cations.
Pressure Safety
Before pressurizing, the user must ensure through appropriate
protective measures that the system or the device will not be over-
pressurized. When working with the instrument and pressurized
gases safety glasses should be worn.
DO NOT permit pressures greater than the safe working pressure to be applied to the instrument.
The specifi ed maximum safe working pressure is 1 barg (14.5 psig) for the low pressure version,
or 20 barg (290 psig) for the high pressure version. This instrument is not designed to accept gas
pressures higher than the specifi ed maximum working pressure.
Application of gas pressures higher than the specifi ed maximum will result in potential damage
and may render the instrument unsafe and in a condition of incorrect functionality. Only personnel
trained in the safe handling of high pressure gases should be allowed to operate this instrument.
Refer to Appendix A - Technical Specifi cations in this manual.
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.
Repair and Maintenance
The instrument must be maintained either by the manufacturer or an accredited service agent. Refer
to www.michell.com for details of Michell instruments' worldwide offi ces contact information.
Calibration
The recommended calibration interval for the S8000 is one year, unless otherwise specifi ed by Michell
Instruments Ltd. The instrument should be returned to the manufacturer, Michell Instruments, or one
of their accredited service agents for re-calibration (go to www.michell.com for contact information).
Safety Conformity
This product meets the essential protection requirements of the relevant EU directives. Refer to
Appendix A - Technical Specifi cations - for details.
Michell Instruments ix
Abbreviations
!
DANGER
Electric
Shock Risk
The following abbreviations are used in this manual:
DCC Dynamic Contamination Correction
FAST Frost Assurance System Technology
MAXCOOL Maximum Sensor Cooling
AC alternating current
atm pressure unit (atmosphere)
barg pressure unit (=100 kP or 0.987 atm) gauge
bara pressure unit (absolute)
°C degrees Celsius
°F degrees Fahrenheit
COM common
dp dew point
EU European Union
g/Kg grams per kilogram
3
grams per cubic meter
g/m
HMI Human Machine Interface
Hz Hertz
IEC International Electrotechnical Commission
Nl/min normal liters per minute
lb pound
mA milliampere
max maximum
min minute(s)
mV millivolt(s)
N/C normally closed
N/O normally open
No number
parts per million (by volume)
ppm
V
ppmW parts per million (by weight)
PRT Platinum resistance thermometer (typically type Pt 100)
psig pound(s) per square inch (gauge)
psia pound(s) per square inch (absolute)
RH relative humidity
RTU Remote Terminal Unit
scfh standard cubic feet per hour
SD storage device card (memory card for storing datalog fi les)
temp temperature
USB Universal Serial Bus
V Volts
S8000 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 hazard warning symbol appears in the following
sections, it is used to indicate areas where potentially
hazardous operations need to be carried out.
Where this symbol appears in the following sections it is
used to indicate areas of potential risk of electric shock.
x 97488 Issue 4, August 2018
S8000 User’s Manual
1 INTRODUCTION
The S8000 is a high precision instrument used for the measurement of dew point in air
and other gases. Relative humidity, moisture content, and other calculated parameters
based on dew point, pressure and temperature of the sample gas can also be displayed.
The S8000 is capable of measuring dew points as low as -60°C (-76°F); it can measure
dew points up to (but not including) the point of condensation (maximum +40°C
(+104 °F)).
Two models of the S8000 instrument are available:
• Low Pressure (1 barg (14.5 psig) max)
• High Pressure (20 barg (290 psig) max)
INTRODUCTION
Figure 1
S8000
Michell Instruments 1
INTRODUCTION
1.1 Operating Principle
The system operates on the chilled mirror principle, whereby a gas sample is passed
into the sensor housing and fl ows over the surface of the chilled mirror contained
within. At a temperature dependent upon the moisture content in the gas, and the
operating pressure, the moisture in the gas condenses out on the surface of the mirror.
An optical system is used to detect the point at which this occurs, and this information
is used to control the mirror temperature and maintain a constant thickness of the
condensation layer on the mirror surface.
A beam of light from an LED (1) is focused on the mirror surface (2) with a fi xed
intensity. As the mirror is cooled, less light is refl ected due to the scattering effect of
the condensate formed on the mirror surface. The levels of refl ected and scattered light
are measured by two photo-detectors (3 & 4) and compared against a third reference
detector (5) measuring the intensity of light from the LED.
The signals from this optics system are used to precisely control the drive to a solid
state thermoelectric cooler (TEC) (6), which heats or cools the mirror surface. The
mirror surface is then controlled in an equilibrium state whereby evaporation and
condensation are occurring at the same rate. In this condition, the temperature of the
mirror, measured by a platinum resistance thermometer (7), is equal to the dew-point
temperature of the gas.
S8000 User’s Manual
3
1
5
4
2
7
6
Figure 2
Operating Principle
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S8000 User’s Manual
!
2 INSTALLATION
2.1 Safety
It is essential that the installation of the electrical and gas
supplies to this instrument be undertaken by competent
2.2 Unpacking the Instrument
INSTALLATION
personnel.
1
23
4
5
Figure 3
Open the box (5) and unpack carefully as follows (see
1. Remove the accessories box (4).
2. Lift out the instrument (2) together with its end packing pieces (1) and
(3).
3. Remove the end packing pieces (1) and (3) set the instrument down at
the site of installation.
4. Save all the packing materials for the purpose of returning the instrument
for re-calibration or any warranty claims.
S8000 Packing
Figure 3)
:
Michell Instruments 3
INSTALLATION
S8000 User’s Manual
The accessories box should contain the following items
1. Traceable calibration certifi cate
2. User's manual
3. IEC power cable
4. SD memory storage card
5. Optics cleaning kit
6. Allen Key SMM
7. USB communications cable
8. Pt100 temperature probe (optional)
9. CAT5 ethernet cable (optional)
10. Microscope (optional)
If there are any shortages, please notify Michell Instruments immediately
(see www.michell.com for contact information).
:
4 97488 Issue 4, August 2018
S8000 User’s Manual
!
2.3 Operating Requirements
2.3.1 Environmental Requirements
The S8000 instrument should either be placed on a fi rm and level surface in a laboratory
environment, or mounted into a standard 19" rack. Recommended ambient temperature
+20 to +25°C (+68 to +77°F) although the instrument will operate, within specifi cation,
at elevated ambient temperatures of up to +40°C (+104°F), providing the cooling
vents are kept clear and unrestricted. It is essential however that this upper
temperature limit (+40°C (+104°F)) is not exceeded.
A free fl ow of air around the instrument is required at all times.
The instrument is suitable for mounting in a standard 19" rack.
INSTALLATION
For rack mounted instruments, forced air cooling of the
rack should be considered if operating at high ambient
2.3.2 Electrical Requirements
All versions of the instrument require the following electrical supply:
• 85 to 264 V AC, 47/63 Hz, 100 VA max
• Alarm outputs for all instrument types comprise two sets of changeover
relay contacts, one set for a
INSTRUMENT FAULT. Both sets of contacts are rated at 24 V, 1 A. NOTE:
THIS RATING MUST NOT BE EXCEEDED.
2.4 Exterior Layout
temperatures.
PROCESS alarm and one set for an
The controls and indicators relating to the operator interface are located on the front
panel.
The external PRT connection, mains power IEC socket, analog output connector, remote
temperature probe connector, alarm relay connector, the USB socket, and the Ethernet
socket (optional) are located on the rear panel.
Figures 5 and 6
and vertical versions of the instrument. Tables 1 and 2 detail the controls and indicators
and the function key operations.
show the layout of these controls for both the rack mount/horizontal
Michell Instruments 5
INSTALLATION
Front Panel
S8000 User’s Manual
11
13
Figure 4
Item Name Description
Microscope
1
Blanking Plug
2 Sensor Housing
Touch Screen
3
Display
Table 1 Front Panel Controls and Indicators
Used to cover the microscope port when not in use. Also
to be used as a key to remove optics window (see Section
5.3).
Exterior housing of the sensor.
See Section 5.3 for information about the sensor head.
Displays measured values and enables the user to control
the operation of the instrument.
See Section 3.2 for information about the touch screen and
menu system.
Front Panel
12
6 97488 Issue 4, August 2018
S8000 User’s Manual
Rear Panel
INSTALLATION
7455
8 77 56
59 10512514513
Figure 5
Item Name Description
Usually slightly above atmospheric pressure in order to
4 Gas Input Port
maintain fl ow rate over the mirror, but can be up to a
maximum of 20 barg depending upon application.
Rear Panel
711
5 Gas Output Port Usually vented to atmosphere.
Three, 2-wire output channels, CH1, CH2 and CH3, each
of which may be confi gured to give either a 0-20 mA or a
4-20 mA current loop output or a 0 to 1 V voltage signal
Analog Output
6
Connector
Remote
7
Temperature
Probe (optional)
8 Alarms
USB
9
Communications
Port
representing any one of the measured or calculated output
parameters selected.
Spans for each signal output are separately confi gurable.
Refer to Section 2.5.2.
6-Pin Lemo socket for connection of remote Pt100
temperature probe.
Process and Fault alarm outputs. Each alarm has one set of
potential free, changeover, relay contacts, common (COM),
normally closed (N/C) and normally open (N/O).
The Process alarm can be confi gured to operate at a specifi ed
level on any of the measured or calculated parameters.
Refer to Section 2.5.3.
Used for connection to an external computer system for
running application software (optional).
Michell Instruments 7
INSTALLATION
!
DANGER
Electric
Shock Risk
RJ45 Ethernet
10
11
Socket
(Optional)
4-wire PRT
bridge output
(Optional)
S8000 User’s Manual
Used for communication with the instrument over a network
connection.
See Section 4.2.3 for details on how to confi gure the
network settings.
See Section 4 for information on using and installing the
application software.
Banana sockets for external 4-wire measurement of the
internal PRT. Active only when PRT set to External from
Display options, and instrument is in the MEASURE phase.
In this mode the dew-point display is set to read zero, DCC
is set to OFF and manual DCC is also disabled.
12
13
14
Flow Control
Valve (Optional)
Pump Input Port
(Optional)
Pump Output
Port (Optional)
Table 2 Rear Panel Controls and Indicators
Used to regulate fl ow through the sensor when pump is in
use.
Can be linked to Gas Output port with supplied tubing for
operation with sample pump - NOT TO BE USED ABOVE
ATMOSPHERIC PRESSURE.
Vented to atmosphere when pump is in use.
2.5 Rear Panel Connections (All Versions)
These tasks should be undertaken only by competent
personnel.
All the connections to the rear panel are electrical
connections.
Exercise due caution, particularly when connecting to
external alarm circuits which could be at high potential.
Connections to the rear panel of the instrument are explained in the following sections.
8 97488 Issue 4, August 2018
S8000 User’s Manual
2.5.1 Power Supply Input
INSTALLATION
The AC power supply is a push fi t into the power input socket as shown in
method of connection is as follows:
11
Figure 7
13
2
1. Ensure that both ends of the power cable are potential free i.e. not
connected to an AC power supply.
2. Check that the
is switched to
ON/OFF switch (1) on the power supply connector
OFF.
. The
3. Push the IEC connector (3) fi rmly into the power input socket (2).
4. Connect the free end of the power cable to a suitable AC power
supply source (voltage range 85 to 264 V AC, 47/63 Hz) and switch
on the AC supply. The instrument may then be switched on, as
required, using the
ON/OFF switch.
Figure 6
Power Supply Input
Michell Instruments 9
INSTALLATION
2.5.2 Analog Output Connections
The three analog outputs can be confi gured to represent any of the directly measured
or calculated output parameters. They are provided as 2-wire signals from a 6-way
connector located on the rear panel of the instrument
Each of these outputs can be set up as either a current loop signal (4-20 mA or 0-20
mA) or alternatively, as a 0-1 V voltage signal. The confi guration of these outputs, i.e.
parameter represented, output type (current loop or voltage) and upper/lower span
levels are set up via the
SETUP Menu Screen (refer to Section 3.2.4).
S8000 User’s Manual
.
These signals may be used to control external systems. During a
HOLD period following a DCC cycle, they are held at the level that they were at
the
immediately prior to the start of the cycle. When the dew-point measurement is stable,
or if the maximum
selected parameter throughout the measurement cycle.
The default settings of these analog outputs are:
HOLD period has expired, they are released and will track the
DCC cycle, and for
Channel 1: 4-20 mA, dew point, -60 to +20°C
Channel 2: 4-20 mA, ppm
, 0 to 3000
V
Channel 3: 4-20 mA, fl ow, 0 to 1000ml
NOTE: The analog outputs are only active during the
will, therefore, be off after switch-on and remain off until the system enters
MEASURE phase.
the
The three analog output ports connections are made via a single, 6-way, push fi t
connector block as shown in
common 0 V line. To differentiate between the outputs it is recommended that a black
lead be used for each of the COM (common) lines and a separate color for each of the
positive lines.
Figure 8
. All outputs are 2-wire signals referenced to a
MEASURE phase. They
Figure 7
Analog Output Connectors
10 97488 Issue 4, August 2018
S8000 User’s Manual
For each output:
1. Remove the terminal block fi tted into the analog output socket.
INSTALLATION
2. Strip back the wire for the common (black) connection to the
exposing approximately 6mm (0.25"). Insert the wire into the
terminal way and screw into the block. Do not overtighten the screw.
3. Strip back the wire for the signal (e.g. red) connection to the
exposing approximately 6mm (0.25"). Insert the wire into the
terminal way and screw into the block. Do not overtighten the screw.
4. Repeat operations 1 and 2 for the other analog outputs, selecting a
different color for the
5. Locate the terminal block over the connector labelled
OUTPUTS and push the terminal block fi rmly into the connector.
2.5.3 Alarm Output Connections
Two alarm outputs are provided from a terminal block (Item 9,
rear panel of the instrument as two pairs of potential free, change-over relay contacts.
These are designated as a
PROCESS alarm and a FAU LT alarm.
OP2 and OP3 outputs.
CH1 output,
OP1 output,
ANALOGUE
Figure 6),
COM1
OP1
located on the
Under the
represent any one of the measured or calculated parameters and set-up to operate when
a pre-set parameter threshold level is exceeded. By default, the
monitor the dew-point parameter.
The
of contamination of the chilled mirror. During normal operational conditions, this alarm
will be off. If the optics or the mirror contamination exceeds 100% of the fi lm thickness,
or if a fault exists on the Pt100, the alarm is triggered, and the relay contacts will
change state.
This fault is also reported to the status area of the display.
The two alarm output ports are connected to the instrument via a single 6-way, push-fi t
connector block as shown in
free, change-over relay contacts.
Each contact set is labelled
SETUP menu, (refer to Section 3.2.4), the PROCESS alarm can be confi gured to
PROCESS alarm is set to
FAU LT alarm is a non-confi gurable alarm which continuously monitors the degree
Figure 9
. Each output comprises a 3-wire set of potential
COM (common 0 V), N/O (normally open with respect to
COM) and N/C (normally closed with respect to COM).
To differentiate between the alarm output channels, it is recommended that a black lead
be used for each of the
N/C lines.
and
COM (common) lines and a separate color for each of the N/O
Michell Instruments 11
INSTALLATION
DANGER
Electric
Shock Risk
S8000 User’s Manual
WARNING: Alarm leads MUST be potential free when wiring
to connector block.
Figure 8
For each output:
1. Strip back the wire for the common (black) connection to the
connector way for the
6mm (0.25") wire and clamp into the screw block
not overtighten the screw.
2. Strip back the wire for the
connector way for the
6mm (0.25") wire and clamp into the screw block N/O terminal way. Do
not overtighten the screw.
3. Strip back the wire for the
connector way for the
6mm (0.25") wire and clamp into the screw block
not overtighten the screw.
4. Repeat operations 1 to 3 for the
appropriate colored wires.
FAU LT alarm contact set, exposing approximately
FAU LT alarm contact set, exposing approximately
FAU LT alarm contact set, exposing approximately
Alarm Output Connectors
COM terminal way. Do
N/O (e.g. green) connection to the N/O
N/C (e.g. blue) connection to the N/C
N/C terminal way. Do
PROCESS alarm contact set, using
COM
5. Locate the terminal block over the connector labelled
the terminal block fi rmly into the connector.
ALARMS and push
12 97488 Issue 4, August 2018
S8000 User’s Manual
2.5.4 Remote PRT Probe (Optional)
1. Rotate the body of the PRT probe connector until it locates in the socket
labelled
2. Push the connector into the socket until it locks. Do not attempt to
force it into the socket. If it will not fi t in, rotate it until the key
locks and it pushes in easily.
3. To remove the connector, slide the connector’s body collar (1) back along
its axis, away from the instrument to release the lock and then gently pull
the connector body out of the socket. Do not attempt to pull it out
with the cable - make sure that the collar is fi rst released.
REMOTE TEMPERATURE (see
INSTALLATION
Figure 10).
Figure 9
Remote PRT Connection
Michell Instruments 13
INSTALLATION
2.5.5 4-Wire PRT Output (Optional)
These four terminal binding posts (Item 1,
Figure 11),
external monitoring purposes.
Two pairs of lines are provided, two drive and
two sense lines. One black (low) and one red
(high) for the drive lines, and one black (low)
and one red (high) for the sense lines.
Connections to these terminal posts can be
made either via 4mm plugs pushed into the
ends of the terminal posts or, alternatively, as
shown, wires (5) connected round the posts
and clamped down by screw action.
are provided for calibration and
S8000 User’s Manual
To set-up the system for
Section 3.2.10.
2.5.6 USB Communications Port Connector
PRT output refer to
Figure 10
The instrument features a USB port for
communication with the Application
Software. The appropriate cable will be
supplied with the instrument.
1. Check the orientation of the connector
and gently push it into the socket
labelled
2. To remove the connector, pull it out of
the socket by holding the connector
body. Do not attempt to remove it from
the socket by pulling on the cable.
USB (see
Figure 12)
.
Internal PRT Output (Optional)
For more information on how to confi gure the Application Software go to Section 4.
Figure 11
USB Port Connection
14 97488 Issue 4, August 2018
S8000 User’s Manual
2.5.7 Ethernet Port (Optional)
The instrument features an optional RJ45 port for communication with the Application
Software.
1. Check the orientation of the connector and gently push it into the socket
labelled
LAN.
INSTALLATION
Figure 12
2. To remove the connector, depress the small locking tab on the top and
pull it out of the socket by holding the connector body.
For more information on how to confi gure the Application Software go to Section 4.
2.5.8 RS232/485 Port (Optional)
The instrument features an optional RS232/485 port for communication with the
application software. This is designed to be used with a standard 9-pin D-sub connector.
1. Check the orientation of the connector and gently push it into the socket
labelled
RS232 or RS485, and tighten the retaining screws.
Ethernet Port (Optional)
Figure 13
2. Loosen the retaining screws, and pull the connector out of the socket by
holding the connector body.
RS232/485 Port (Optional)
Michell Instruments 15
INSTALLATION
RS232
Pin 1 N/C
Pin 2 TXD
Pin 3 RXD
Pin 4 N/C
Pin 5 GND
Pin 6 N/C
Pin 7 N/C
Pin 8 N/C
Pin 9 N/C
RS485
Pin 1 N/C
Pin 2 N/C
Pin 3 A
Pin 4 N/C
Pin 5 GND
Pin 6 N/C
Pin 7 N/C
Pin 8 B
Pin 9 N/C
S8000 User’s Manual
RS232 Pinout (9-pin female)
Pin 1
Pin 6
RS485 Pinout (9-pin female)
Pin 1
Pin 6
Pin 5
Pin 9
Pin 5
Pin 9
16 97488 Issue 4, August 2018
S8000 User’s Manual
!
!
2.5.9 Connection of Gas Supplies
POSSIBLE INJURY! The tubing, valves and other apparatus
attached to this instrument must be adequate for the
maximum pressure which will be applied, otherwise physical
injury to the operator or bystander is possible.
Before connection or disconnection of the instrument to
and from the gas line it is essential to vent the system to
atmospheric pressure, otherwise severe injury could result.
Sample gas connections are made via the GAS OUT port (7) and the GAS IN port (8)
located on the rear panel.
INSTALLATION
87
653
6
5
4
3
2
1
Figure 14
Michell Instruments 17
Gas Connections
4 1, 2
INSTALLATION
The sample inlet and outlet connections are either 6mm or ¼" Swagelok® tube couplings
(optional). The gas input connection must be made with 6mm or ¼" stainless steel
tubing (the appropriate size for the connectors fi tted). The gas output connection for
most applications can just be exhausted to atmosphere via 300mm (11.8") of PTFE
tubing (1).
S8000 User’s Manual
The method of connection to the
1. Cut appropriate diameter stainless steel tubing (2) to the correct length
and, if necessary, bend to shape to suit the location of the instrument.
NOTE: To facilitate ease of connection to the port, at least 75mm
(3") of the tubing coming out of the
2. Clean off any burrs or metal shavings adhering to the tubing.
3. Pass the tubing (2) through the Swagelok nut (3).
4. Fit the back ferrule (4) over the tubing (2) with the bevelled end facing
the back of the front ferrule (5).
5. Place the front ferrule (5) over the tubing (2), bevelled end towards the
adaptor (6).
6. Push the tubing as far as it will go into the fi tting and tighten up the
locking nut (3) fi nger tight.
7. Hold the adaptor (6) fl ats with a wrench and tighten up the locking nut
(3) 1¼ turns. This action compresses the front ferrule (5) and back
ferrule (4) onto the tubing to form a gas tight seal. CAUTION: Do not
overtighten as this could cause the ferrules to crack and destroy
the integrity of the seal.
GAS IN port (8) is as follows.
GAS IN port should be straight.
8. Connect up the
in operations 1 - 8 above optionally using PTFE tubing (1) in place of
stainless steel (2).
GAS OUT port (7) in a similar manner to that described
18 97488 Issue 4, August 2018
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