Michell Instruments S8000-RS Operating Manual

S8000 RS

Chilled Mirror Hygrometer

User’s Manual

97315 Issue 9

April 2019

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S8000 RS

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S8000 RS User’s Manual S8000 RS User’s Manual

Contents

Safety ...............................................................................................................................vii

Electrical Safety ..........................................................................................................vii

Pressure Safety ...........................................................................................................vii

Toxic Materials ............................................................................................................ vii

Repair and Maintenance ..............................................................................................vii

Calibration ..................................................................................................................vii

Safety Conformity .......................................................................................................vii

Abbreviations .................................................................................................................... viii

Warnings .......................................................................................................................... viii

1 INTRODUCTION ................................................................................................1

1.1 Operating Principle ............................................................................................. 1

2 INSTALLATION ..................................................................................................3

2.1 Safety ................................................................................................................ 3

2.2 Unpacking the Instrument ................................................................................... 3

2.3 Transportation Clamp Removal ............................................................................ 4

2.4 Operating Requirements ..................................................................................... 5

2.4.1 Environmental Requirements ......................................................................... 5

2.4.2 Electrical Requirements ................................................................................. 5

2.5 Exterior Layout ................................................................................................... 6

2.6 Rear Panel Connections ...................................................................................... 8

2.6.1 Power Supply Input ....................................................................................... 8

2.6.2 Analog Output Connections ............................................................................ 9

2.6.3 Alarm Output Connections ........................................................................... 11

2.6.4 Remote PRT Probe ..................................................................................... 12

2.6.5 USB/Ethernet Communications Port Connector .............................................. 13

2.6.6 RS232/485 Port (optional) ........................................................................... 14

2.7 Conversion of S8000 RS to Rack Mount ............................................................. 15

2.7.1 Fitting Rack Mounted Version into Rack ........................................................ 16

3 OPERATION ....................................................................................................17

3.1 General Operational Information ........................................................................ 17

3.1.1 Sample Flow Adjustment ............................................................................. 17

3.2 Start-up procedure when measuring in flammable gases ..................................... 18

3.3 Instrument Display ........................................................................................... 18

3.3.1 Main Screen ................................................................................................ 19

3.3.2 Customizable Readouts................................................................................ 20

3.3.3 Operational Status Display ........................................................................... 21

3.3.4 Cooler Set up .............................................................................................. 22

3.3.5 Setup Menu Screen ..................................................................................... 23

3.3.6 Menu Structure .......................................................................................... 25

3.3.7 DCC ........................................................................................................... 26

3.3.8 LOGGING ................................................................................................... 27

3.3.9 OUTPUTS ................................................................................................... 29

3.3.10 ALARM ....................................................................................................... 29

3.3.11 DISPLAY .................................................................................................... 30

3.3.12 CLOCK ....................................................................................................... 31

3.3.13 ABOUT (Network Settings) ........................................................................... 31

3.4 Operational Functions ....................................................................................... 32

3.4.1 Operating Cycle .......................................................................................... 32

3.5 Operating Guide ............................................................................................... 33

3.5.1 Automatic Mode .......................................................................................... 33

iv 97315 Issue 9, April 2019

3.5.1.1 Description ........................................................................................... 33

3.5.1.2 Operating Practice ................................................................................. 33

3.5.1.3 Flood Recovery ..................................................................................... 34

3.6 Manual Mode ................................................................................................... 34

3.6.1 Description ................................................................................................. 34

3.6.1.1 Operating Practice ................................................................................. 34

3.6.2 DCC - Dynamic Contamination Control .......................................................... 35

3.6.3 MAXCOOL Function ..................................................................................... 36

3.6.4 Pressure Input ............................................................................................ 36

3.6.5 Data Logging .............................................................................................. 36

3.6.6 Frost Assurance System Technology (FAST) .................................................. 37

3.6.7 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 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 Fuse Replacement ........................................................................................... 46

5.2 Sensor Mirror Cleaning ...................................................................................... 48

6 GOOD MEASUREMENT PRACTICE .....................................................................49

6.1 Sampling Hints ................................................................................................. 49

7 CALIBRATION ..................................................................................................52

7.1 Traceability ...................................................................................................... 52

Tables

Table 1 Front Panel Controls ....................................................................................6

Table 2 Rear Panel Connections ...............................................................................7

Table 3 Main Screen Description ............................................................................. 20

Table 4 Operational Status Display ........................................................................ 21

Table 5 Cooler Setup Parameters ............................................................................22

Table 6 Cooler Alarm Warnings .............................................................................. 22

Table 7 DCC Parameters ........................................................................................ 26

Table 8 Logging Parameters ................................................................................... 27

Table 9 SD Card Status Indicators ..........................................................................28

Table 10 Outputs Parameters ................................................................................... 29

Table 11 Alarm Parameters ......................................................................................29

Table 12 Display Parameters ....................................................................................30

Table 13 Clock Parameters .......................................................................................31

Table 14 Network Parameters ..................................................................................31

Table 15 Data Acquisition Control Description ...........................................................42

Table 16 Graph Control Description ..........................................................................43

Table 17 Status Bar Description ...............................................................................43

Table 18 Default Set-Up Parameters .........................................................................58

Table 19 Register Map ............................................................................................. 62

Michell Instruments v

S8000 RS User’s Manual S8000 RS User’s Manual

Figures

Figure 1 Operating Principle .......................................................................................... 2

Figure 2 Rear clamp ..................................................................................................... 4

Figure 3 Front clamp .................................................................................................... 5

Figure 4 Front Panel ..................................................................................................... 6

Figure 5 Rear Panel ...................................................................................................... 7

Figure 6 Power Supply Input ......................................................................................... 8

Figure 7 Alarm and Analog Output Connection ............................................................. 10

Figure 8 Remote PRT Connection ................................................................................ 12

Figure 9 USB Port Connection ..................................................................................... 13

Figure 10 Ethernet Port ................................................................................................ 13

Figure 11 RS232/485 Port (optional) ............................................................................. 14

Figure 12 Conversion to Rack Mount ............................................................................. 15

Figure 13 Initialising Overlay Screen .............................................................................. 18

Figure 15 Main Screen Layout ....................................................................................... 19

Figure 14 Main Screen .................................................................................................. 19

Figure 16 Cooler Setup Screen ...................................................................................... 22

Figure 17 Setup Menu Screen ....................................................................................... 23

Figure 18 Virtual Keyboard .......................................................................................... 24

Figure 19 Menu Structure ............................................................................................. 25

Figure 20 DCC Screen .................................................................................................. 26

Figure 21 Logging Screen ............................................................................................. 27

Figure 22 Outputs Screen ............................................................................................. 29

Figure 23 Alarm Screen ................................................................................................ 29

Figure 24 Display Screen .............................................................................................. 30

Figure 25 Clock Screen ................................................................................................. 31

Figure 26 Network Settings Screen ................................................................................ 31

Figure 27 Typical Operating Cycle .................................................................................. 32

Figure 28 Communications Setup Screen ....................................................................... 38

Figure 29 Windows Device Manager Screen ................................................................... 39

Figure 30 Network Settings Screen ................................................................................ 40

Figure 31 Options Screen ............................................................................................. 41

Figure 32 Data Acquisition Screen ................................................................................. 42

Figure 33 Variables Editor Screen .................................................................................. 45

Figure 34 Fuse Replacement ......................................................................................... 46

Figure 35 Sensor Mirror Cleaning .................................................................................. 48

Figure 36 Material permeability comparison ................................................................... 49

Figure 37 Typical Calibration Certificate ......................................................................... 52

Figure 38 Operational Range......................................................................................... 55

Figure 39 S8000 RS Dimensions .................................................................................... 55

Appendices

Appendix A Technical Specifications ...................................................................................54

Appendix B Default Set-Up Parameters ...............................................................................58

Appendix C Modbus Holding Register Map ..........................................................................60

Appendix D Quality, Recycling & Warranty Information ........................................................68

Appendix E Analyzer Return Document & Decontamination Declaration ................................70

vi 97315 Issue 9, April 2019

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 limits are 85 to 264 V AC, 47/63 Hz. Refer to Appendix A - Technical Specifications.

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 specified safe working pressure is 10 barg (145 psig). Refer to Appendix A - Technical Specifications.

Application of gas pressures higher than the specified 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.

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 offices contact information.

Calibration

The recommended calibration interval for the S8000 RS is one year, unless otherwise specified 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. Further details of applied standards may be found in the product specification.

Michell Instruments vii

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) bar pressure unit (=100 kP or 0.987 atm) °C degrees Celsius °F degrees Fahrenheit COM common dp dew point EU European Union g/kg grams per kilogram g/m3 grams per cubic meter 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 ppmV parts per million (by volume) ppmW parts per million (by weight) PRT Platinum resistance thermometer (typically type Pt100) psig pound(s) per square inch (gauge) rh relative humidity RTU Remote Terminal Unit scfh standard cubic feet per hour SD storage device card (memory card for storing datalog files) sec second(s) temp temperature USB Universal Serial Bus V Volts

S8000 RS User’s Manual S8000 RS 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.

viii 97315 Issue 9, April 2019

1 INTRODUCTION

The S8000 RS is a high precision instrument used for the measurement of moisture content in air and other gases. Relative humidity and other calculated parameters based on dew point, pressure and temperature of the sample gas can also be displayed. Gases can be sampled at a maximum pressure of 10 barg (145 psig).

The S8000 RS is capable of measuring dew points as low as -80°C or -90°C (-112°F or

-130°F) (depending on the model - RS80 or RS90); it can measure dew points up to (but not including) the point of condensation.

1.1 Operating Principle

The system operates on the chilled mirror principle, whereby a gas sample is passed into the sensor housing and flows 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.

INTRODUCTION

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 light emitting diode (1) provides a light beam of constant intensity which is focused by a lens system (2) to become the incident beam on the mirror surface (3), flooding it with a pool of light.

Before the light beam reaches the mirror (3), a beam splitter (4) directs part of the beam via a lens system (5) onto a sensor (6) which monitors the intensity of the LED light and provides a feedback loop to keep this at a constant level.

Two sensors (7 and 8) monitor the light level reflected by the mirror. One of these sensors (7) measures the light level due to the reflected incident beam and the other (8) measures the degree of light scatter due to the formation of water/ice on the mirror surface. Each sensor has its own optical lens system (9) and (10) to concentrate the reflected light onto the sensor.

The output from each of these sensors is compared and then used to control the drive to a Peltier heat pump (11). Dependant on the result of this comparison, the control system will cause the heat pump (11) to either heat or cool the mirror (3) in order to maintain the desired condensation film thickness on the mirror surface.

At an equilibrium point, where the evaporation rate and condensation rate on the surface of the mirror are equal, the mirror temperature, read by a Pt100 platinum resistance thermometer (12) embedded in the mirror, represents the dew point.

Michell Instruments 1

INTRODUCTION

The ‘hot’ side of the Peltier is coupled to an auxiliary cooling system through a thermal mass (13) – which smooths its response. The cooling system removes heat from the hot side of the Peltier, by cooling it to an appropriate temperature. This supplements the depression capabilities of the heat pump, and enables measurement of very low dew points.

S8000 RS User’s Manual S8000 RS User’s Manual

94 7

Figure 1

Operating Principle

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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

The S8000RS is a heavy instrument and should be unpacked by two people. Carefully open the crate and check for any signs of transit damage before touching the instrument. Remove the accessories before touching the instrument. Carefully lift the unit out holding the case and not the foam as these may become loose and allow the instrument to fall. Ensure one person has a good grip of the unit whilst the other removes the foam protectors:

INSTALLATION

personnel.

Save all the packing materials for the purpose of returning the instrument for re-calibration or any warranty claims.

Failure to return the instrument in the original packing, or failure to return the instrument with the transit clamp fitted may result in warranty claims being denied.

Michell Instruments 3

INSTALLATION

The accessories crate should contain the following items:

• Traceable calibration certificate

• SD memory storage card

• USB or Ethernet communications cable

• IEC power cable

• Microscope

• Remote Pt100 temperature probe (optional)

• Optics cleaning kit (optional)

• 19" Rack mount kit (optional)

• Transport case (optional)

If there are any shortages please notify the supplier immediately.

S8000 RS User’s Manual S8000 RS User’s Manual

2.3 Transportation Clamp Removal

Prior to powering the instrument on, the transportation clamps must be removed. There are two separate clamps:

1. Rear clamp

Carefully place the instrument on its side, with the sensor head side down.

As per Figure 3, there are two slots machined into the outer case. A bolt will be visible through each.

Figure 2

Use a 5mm Allen key to loosen each bolt (do not try to remove them) and slide them into the forward position in the slots. Re-tighten the bolts in this position so they cannot move around.

Carefully place the instrument back onto its base.

Rear clamp

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INSTALLATION

2. Front clamp

As per Figure 4, use a 3mm Allen key to remove the 2 bolts on either side of the front clamp. Keep these bolts safe for future use.

Remove the microscope cover. The front clamp should now slide away from the instrument.

2.4 Operating Requirements

2.4.1 Environmental Requirements

It is important to operate the S8000 RS within the following environmental conditions:

Minimum Operating Temperature 5°C Maximum Operating Temperature 30°C Maximum Relative Humidity 80%

2.4.2 Electrical Requirements

Figure 3

Front clamp

The S8000 RS requires the following electrical supply:

• 85 to 264 V AC, 47/63 Hz, 250 VA max

• Alarm outputs comprise two sets of changeover relay contacts, one set

for a PROCESS alarm and one set for an INSTRUMENT FAULT. Both sets of contacts are rated at 24 V, 1A. NOTE: THIS RATING MUST NOT BE

EXCEEDED.

Michell Instruments 5

INSTALLATION

2.5 Exterior Layout

The controls, indicators and connectors associated with the S8000 RS are located on the front and rear panels of the instrument.

The controls and indicators relating to the operator interface are located on the front panel. The gas outlet, gas inlet, external PRT connection, mains power IEC socket, analog output connector, remote temperature probe connector, alarm relay connector, and the USB/RJ45 Ethernet socket are located on the rear panel.

Front Panel

S8000 RS User’s Manual S8000 RS User’s Manual

Figure 4

No Name Description

Takes an SD card used to store logged data

1 SD Card Slot

3 Sensor Housing

Touch Screen Display

See Section 3.2.8 for more details on how to use the logging features

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

Exterior housing of the sensor See Section 5.2 for instructions on how to remove the housing and clean the mirror

Front Panel

Table 1

Front Panel Controls

6 97315 Issue 9, April 2019

Rear Panel

INSTALLATION

Figure 5

No. Name Description

¼” Swagelok Gas Outlet

¼” VCR Gas Inlet

External PRT Connection

Mains power IEC Socket

6-Way

Analog Output Connector

Remote

Temperature Probe Connector

6-Way

Alarm Relay Connector

RJ45

Ethernet Socket (Optional)

9 USB Type B

Connection for venting sample gas to atmosphere or vent line once it has passed through the instrument

Connection for supplying the instrument with sample gas, usually at a pressure slightly higher than atmospheric to maintain flow through the instrument

Banana sockets for external 4-wire measurement of the internal PRT See Section 3.2.11 for more info

Universal power input 85 to 264 V AC, 47/63 Hz Fuse - 3.15 A, Anti-Surge, Glass, 20mm x 5mm Features integrated power ON/OFF switch

Three configurable 2-wire channels providing 0-20 mA, 4-20 mA or 0 - 1 V output. The 0/4-20mA outputs are active (sourcing) and must be connected to a passive (sinking) input on the receiving equipment. See Section 3.2.9 for instructions on how to configure the analog outputs See Section 2.5.2 for general information

6-Pin Lemo socket for connection of remote Pt100 temperature probe

Process and Fault alarm outputs See Section 2.5.3 for general information on the alarm relays See Section 3.2.10 for instructions on how to configure the process alarm

Used for communication with the instrument over a network connection See Section 3.2.13 for details on how to configure the network settings See Section 4.1 for information on using and installing the application software

Used for communication with the instrument via the application software See Section 4.1 for information on using and installing the application software

1 2

Rear Panel

Table 2

Rear Panel Connections

Michell Instruments 7

INSTALLATION

DANGER

Electric

Shock Risk

2.6 Rear Panel Connections

These tasks should be undertaken only by competent

All the connections to the rear panel are electrical

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.

2.6.1 Power Supply Input

S8000 RS User’s Manual S8000 RS User’s Manual

personnel.

connections.

The AC power supply is a push fit into the power input socket as shown in method of connection is as follows:

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 ON/OFF switch (1) is switched to OFF.

3. Push the IEC connector (3) firmly 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. Switch on the instrument, as required, using the

power ON switch.

Figure 7.

The

Figure 6

Power Supply Input

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2.6.2 Analog Output Connections

The three analog outputs can be configured 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 0/4-20mA outputs are active (sourcing) and must be connected to a passive (sinking) input on the receiving equipment. The configuration 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 3.2.9).

These signals may be used to control external systems. During a DCC cycle, and for the hold period following a DCC cycle, they are held at the level that they were at

immediately prior to the start of the cycle. When the dew-point measurement is stable, or if the maximum hold period has expired, they are released and will track the selected parameter throughout the measurement cycle.

The default settings of these analog outputs are:

INSTALLATION

Channel 1: Dew point, -80 to +20ºC Channel 2: ppmV, 0 to 3000 Channel 3: Flow, 0 to 1000ml/min

NOTE: The analog outputs are only active during the MEASURE phase. They will, therefore, be off after switch-on and remain off until the system enters

the MEASURE phase.

The three analog output ports connections are made via a single, 6-way, push fit connector block as shown in referenced to a 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, positive-going signals

Michell Instruments 9

INSTALLATION

For each output:

1. Remove the terminal block fitted into the analog output socket.

2. Strip back the wire for the common (black) connection to the

CH1 output, exposing approximately 6mm (0.25"). Insert the wire

into the COM1 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

OP1 output, exposing approximately 6mm (0.25"). Insert the

wire into the OP1 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 wire for the OP2 and OP3 outputs.

5. Locate the terminal block over the connector labelled ANALOG

OUTPUTS and push the terminal block firmly into the connector.

S8000 RS User’s Manual S8000 RS User’s Manual

Figure 7

Alarm and Analog Output Connection

10 97315 Issue 9, April 2019

2.6.3 Alarm Output Connections

DANGER

Electric

Shock Risk

Two alarm outputs are provided from a terminal block, located on the 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.

Under the Setup Menu Screen, (refer to Section 3.2.5), the PROCESS alar m can be config ured to 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 PROCESS alarm is set to monitor the dew-point parameter.

The FAU LT alarm is a non-configurable alarm which continuously monitors the degree 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 film 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 Main Screen.

The two alarm output ports are connected to the instrument via a single 6-way, push-fit connector block as shown in free, change-over relay contacts.

Figure 8

INSTALLATION

. Each output comprises a 3-wire set of potential

Each contact set is labelled 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 is used for each of the COM (common) lines and a separate color for each of the N/O and N/C lines.

WARNING: Alarm leads MUST be potential free when wiring to the connector block. Both sets of contacts are rated at 24

V, 1A. THIS RATING MUST NOT BE EXCEEDED.

For each output:

1. Strip back the wire for the common (black) connection to the

COM connector way for the FAU LT alarm contact set, exposing

approximately 6mm (0.25") wire. Clamp into the screw block COM terminal way. Do not overtighten the screw.

2. Strip back the wire for the N/O (e.g. green) connection to the

N/O connector way for the FAU LT alarm contact set, exposing

approximately 6mm (0.25") wire. Clamp into the screw block N/O terminal way. Do not overtighten the screw.

3. Strip back the wire for the N/C (e.g. blue) connection to the

N/C connector way for the FAULT alarm contact set, exposing

approximately 6mm (0.25") wire. Clamp into the screw block N/C terminal way. Do not overtighten the screw.

Michell Instruments 11

INSTALLATION

4. Repeat operations 1 to 3 for the PROCESS alarm contact set, using appropriately colored wires.

5. Locate the terminal block over the connector labelled ALARMS and push the terminal block firmly into the connector.

2.6.4 Remote PRT Probe

1. Rotate the body of the PRT probe connector until it locates in the socket labeled REMOTE TEMPERATURE (see

2. Push the connector into the socket until it locks. NOTE: Do not

attempt to force it into the socket. If it does not fit 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. Gently pull the connector body out of the socket. NOTE: Do not attempt

to pull the connector out with the cable - make sure that the collar is first released.

S8000 RS User’s Manual S8000 RS User’s Manual

Figure 9).

Figure 8

Remote PRT Connection

12 97315 Issue 9, April 2019

2.6.5 USB/Ethernet Communications Port Connector

CH1

GND

CH2

GND

CH3

GND

ANALOGUE OUTPUTS

LAN

REMOTE SENSOR MEASUREMENT

CALIBRATION CURRENT = 1mA

PT100

1 2 3 4

The instrument features a USB port and an optional Ethernet 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 communications socket (see

Figures 10 and 11)

2. To remove the connector, pull it out of the socket by holding the connector body. If using an Ethernet cable there will be a small locking tab that needs to be depressed in order to release the connector. Do not attempt to remove the connector from the

socket by pulling on the cable.

ALARMS

FAULT PROCESS

USB

N/C

OFF

N/O

COM

REMOTE TEMPERATURE

INSTALLATION

Figure 9

ALARMS

FAULT PROCESS

USB

N/C

N/O

Figure 10

COM

USB Port Connection

LAN

REMOTE TEMPERATURE

OFF

COM

Ethernet Port

ANALOGUE OUTPUTS

CH1

CH2

GND

CH3

GND

USB Connection

The application software includes a virtual serial port driver allowing the customers own software to be used with the device. The communications protocol used is Modbus RTU. Refer to Appendix C for the Modbus register map.

Ethernet Connection

Appendix C for the Modbus register map.

Michell Instruments 13

The communication protocol used with the Ethernet port is Modbus TCP. Refer to

INSTALLATION

N/C

N/O

COM

OFF

COM

CH1

GND

CH2

GND

CH3

GND

ALARMS

FAULT PROCESS

ANALOGUE OUTPUTS

REMOTE TEMPERATURE

RS232

USB

REMOTE SENSOR MEASUREMENT

CALIBRATION CURRENT = 1mA

PT100

1 2 3 4

2.6.6 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. The communications protocol used is Modbus RTU. Refer to Appendix C for the Modbus register map.

1. Check the orientation of the connector and gently push it into the socket labelled RS232 or RS485, and tighten the retaining screws.

S8000 RS User’s Manual S8000 RS User’s Manual

Figure 11

RS232/485 Port (optional)

2. Loosen the retaining screws, and pull the connector out of the socket by holding the connector body.

RS232

Pin 2 TXD

RS232 Pinout (9-pin female)

Pin 1

Pin 5

Pin 3 RXD Pin 5 GND

RS485

Pin 3 A

Pin 6

RS485 Pinout (9-pin female)

Pin 1

Pin 9

Pin 5

Pin 5 GND Pin 8 B

Pin 6

Pin 9

14 97315 Issue 9, April 2019

2.7 Conversion of S8000 RS to Rack Mount

To convert an S8000 RS to a rack mounted version, a rack mounting kit (Part No. S8K401-PKI) is required. This conversion pack comprises two steel wings and four rack mounting screws and washers. Each wing bolts to the side of the instrument with four screws (already in the instrument) as shown in

Figure 13.

INSTALLATION

Figure 12

1. Turn the unit on its left hand end and remove the four screws and washers from the side panel.

2. Line up the fixing holes on the right hand side of the instrument with the corresponding holes in the right hand wing (flange facing outwards).

3. Insert the four screws and washers through the wing and tighten finger tight.

4. Ensure that the front flange is square to the front of the instrument and tighten the screws.

5. Turn the unit on its right hand end and repeat operations 1 to 4.

To remove the rack support wings remove the unit from the rack (if necessary) and follow the directions above, in reverse.

NOTE: The rack mounting wings are designed to hold the

unit into the rack, not to support its full weight.

The instrument should be placed onto a shelf or rails

Conversion to Rack Mount

Michell Instruments 15

INSTALLATION

2.7.1 Fitting Rack Mounted Version into Rack

1. Remove the connector blocks from the alarm and analog output sockets.

2. If necessary, remove any covers from the rack cabinet to gain access to the rear and side.

3. Connect up the analog and alarm output connector blocks to the internal rack wiring (refer to Section 2.5.2 & Section 2.5.3), ensuring that there is sufficient free cable to permit withdrawal of the instrument from the rack.

4. Slide the instrument into the rack and onto the correctly positioned shelf or rails. Insert the four rack mounting screws and washers.

5. Ensure that the front panel of the instrument is flush and square with the front of the rack and tighten the fixing screws.

6. Connect the sample pipework to the gas inlet, and the vent line to the gas outlet, as required.

S8000 RS User’s Manual S8000 RS User’s Manual

7. Insert the analog and alarm connectors into their respective sockets on the rear of the instrument (refer to external PRT probe and USB communications cable and connector as appropriate.

8. Connect the power supply cable and switch the ON/OFF switch to

Figure 8)

and connect the

ON.

9. Refit any covers to the rack as necessary.

To remove from the rack follow the directions above, in reverse.

16 97315 Issue 9, April 2019

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