instruction manual - dublin institute of technologyeleceng.dit.ie/gavin/dt275/cex manual issue...

EXTRACTS FROM

INSTRUCTION MANUAL

CEX

CHEMICAL REACTORS TEACHING EQUIPMENT

CEX

ISSUE 16

FEBRUARY 2003

INSTRUCTION MANUAL

CEX

CHEMICAL REACTORS TEACHING EQUIPMENT

CEX

ISSUE 16

FEBRUARY 2003

CEX CHEMICAL REACTORS SERVICE UNIT

IMPORTANT SAFETY INFORMATION

All practical work areas and laboratories should be covered by local regulations which must be followed at all times. If required, Armfield can supply a typical set of laboratory safety rules. Your CEX reactor bench has been designed to be safe in use, when installed, operated and maintained in accordance with the instructions in this manual. As with any piece of sophisticated equipment, dangers may exist if the equipment is misused, mishandled or badly maintained.

Water-Borne Hazards The equipment described in this instruction manual involves the use of water which under certain conditions can create a health hazard due to infection by harmful micro-organisms. For example, the microscopic bacterium called Legionella pneumophila will feed on any scale, rust, algae or sludge in water and will breed rapidly if the temperature of water is between 20 and 45°C. Any water containing this bacterium which is sprayed or splashed creating air-borne droplets can produce a form of pneumonia called Legionnaires Disease which is potentially fatal. Legionella is not the only harmful micro-organism which can infect water, but it serves as a useful example of the need for cleanliness. Under the COSHH regulations, the following precautions must be observed: Any water contained within the product must not be allowed to stagnate, ie. the water must be changed regularly. Any rust, sludge, scale or algae on which micro-organisms can feed must be removed regularly, i.e. the equipment must be cleaned regularly. Where practicable the water should be maintained at a temperature below 20°C or above 45°C. If this is not practicable then the water should be disinfected if it is safe and appropriate to do so. Note that other hazards may exist in the handling of biocides used to disinfect the water. A scheme should be prepared for preventing or controlling the risk incorporating all of the actions listed above. Further details on preventing infection are contained in the publication “The Control of Legionellosis including Legionnaires Disease” - Health and Safety Series booklet HS (G) 70.

ELECTRICAL SAFETY The equipment described in this Instruction Manual operates from a mains voltage electrical supply. It must be connected to a supply of the same frequency and voltage as marked on the equipment or the mains lead. If in doubt, consult a qualified electrician

1


or contact Armfield. The equipment must not be operated with any of the panels removed. To give increased operator protection, the unit incorporates a Residual Current Device (RCD), alternatively called an Earth Leakage Circuit Breaker, as an integral part of this equipment. If through misuse or accident the equipment becomes electrically dangerous, the RCD will switch off the electrical supply and reduce the severity of any electric shock received by an operator to a level which, under normal circumstances, will not cause injury to that person. At least once each month, check that the RCD is operating correctly by pressing the TEST button. The circuit breaker MUST trip when the button is pressed. Failure to trip means that the operator is not protected and the equipment must be checked and repaired by a competent electrician before it is used.

HOT SURFACES AND LIQUIDS The unit incorporates a pumped electric water heater, and is capable of producing temperatures that could cause skin burns. Before disconnecting any of the pipes or tubing:

- Stop all the pumps. - Leave time for the water to cool - Check that the temperature is at a safe level

Do not touch any surfaces close to ‘Hot Surfaces’ warning labels, or any of the interconnecting tubing, whilst the equipment is in use.

CHEMICAL SAFETY Details of the chemicals intended for use with this equipment are given in the Product Manuals for the different reactor options available with this equipment. Chemicals purchased by the user are normally supplied with a COSHH data sheet which provides information on safe handling, health and safety and other issues. It is important that these guidelines are adhered to. Note:

- It is the user’s responsibility to handle chemicals safely - Prepare chemicals and operate the equipment in well ventilated areas - Only use chemicals specified in the equipment manuals and in the

concentrations recommended

2


ARMFIELD LIMITED

OPERATING INSTRUCTIONS AND EXPERIMENTS

CEX CHEMICAL REACTORS TEACHING EQUIPMENT

1. INTRODUCTION 5

2. EQUIPMENT DESCRIPTION 7

2.1 Chemical storage vessels. 7

2.2 Feed pumps 8

2.3 Stirrer control panel 8

2.4 Hot water circulator 8

2.5 Temperature control of reactor 9

2.6 Conductivity measurement of reactor contents 10

2.7 Reactor fitment 10

2.8 Mainsplate at rear of plinth 10

3. OPERATION 11

3.1 Switching-on the unit 11

3.2 Filling the feed tanks 11

3.3 Controlling the feed pumps 11

3.4 Operation of the stirrer (CEM MkII and CEB MkII) 12

3.5 Operation of temperature controller 12

3.6 Operating the console 12

3.7 Calibrating the feed pumps 13

3.8 Operating the CEM MkII 13

4. SPECIFICATIONS 14

4.1 Overall dimensions: 14

4.2 Electrical supply: 14

4.3 Pin connections 14

4.4 Miscellaneous 15

5. ROUTINE MAINTENANCE 16

5.1 General 16

5.2 RCD test 16

3


5.3 Calibration of the conductivity sensor 16

5.4 Accessing the electrical circuits inside the plinth 17

5.5 Draining the hot water circulator 18

5.6 Temperature controller set-up 18

5.7 Priming the hot water circulator 19

6. APPENDIX 1: INSTALLATION GUIDES 20

6.1 CEM/CEX installation guide 20

6.2 CET/CEX installation guide 23

6.3 CEB/CEX installation guide 26

4


1. INTRODUCTION The Armfield CEX Chemical Reactors Teaching Equipment demonstrates the characteristics of the important types of chemical reactor, batch stirred tank reactor (batch reactor), continuous stirred tank reactor (CSTR) and tubular reactor. Other types of reactor are demonstrated by separate equipment: CEU, packed bed chemical and enzymic reactors; and CEP MkII, continuous stirred tank reactors in series. The reactors available for use with CEX are as follows:

- CEB MkII batch reactor - CEM MkII CSTR - CET MkII Tubular reactor

There is a mounting position on CEX for any one of the reactors above. Reactors are interchangeable. CEX is in effect the bench providing the services required by each of the reactors such as dual peristaltic pumps for feed delivery, a hot water circulator or chiller (optional) for constant temperature operation, and sensors – temperature and conductivity. CEX can be operated with the IFD6 interface device to allow computer data logging. Below CEX is shown with the CEM MkII:

CEX fitted with CEM MkII continuous stirred tank reactor

5

CEX CHEMICAL REACTORS SERVICE UNIT CEX CHEMICAL REACTORS SERVICE UNIT

6

6


2. EQUIPMENT DESCRIPTION The chemical reactors service unit consists of a moulded ABS plinth which is used as a mounting for the Chemical reactor to be used. It also provides the ancillary services for the reactor.

armfield

CHEMICAL REACTOR SERVICE UNIT

CEX

FRONT VESSEL REAR VESSEL

TEMPERATURE CONTROL

1

0

CHILL

HEAT

DATA O/P

CONDUCTIVITY mS

SOL.

out 1

MTW 11lae

°C

CEM CONTINUOUS STIRRED TANK REACTORTemperature

probe

Conductivity probe

Stirrer plug

BOTTOM OF COIL

TO TOP OF COIL AFTER PRIMING

CEX with CEM MkII reactor fitted Plinth

2.1 Chemical storage vessels. The reagent tank module consists of two glass vessels mounted into a PVC base which is located on studs in the plinth and held in position by thumbnuts. Drain valves are fitted to the underside of each vessel and are accessible within the plinth trough.

Rigid standpipes are mounted in the lids of the vessels through a gland. Flexible silicone tubing is used to connect the standpipes to the pumps.

thumbnuts

standpipes

Drain valves

7


2.2 Feed pumps Two variable throughput peristaltic pumps are used to pump the reagents from the storage vessels to the fitted reactor. The pumps are mounted on control plates mounted on the front of the plinth. A remote control facility allows the pumps to be driven from an external 0-5V dc signal, via the data logging connector.


Manual speed control

Stirrer control panel Data logging ports Feed pumps

2.3 Stirrer control panel CEM MkII and CEB MkII reactors are equipped with agitators driven by electric motor. The control panel is located on the front of the plinth (see above).

2.4 Hot water circulator A self contained hot water circulator is positioned on the plinth at the rear of the control console housing (see below).

Flexible tubes are used to connect the circulator to each reactor. Water, heated by electrical heating element in the circulator, is sucked by a gear pump, contained within the circulator module, through the reactor heating path and into the priming vessel attached to the side of the hot water circulator. The hot water is drawn from the priming vessel and back into the hot water circulator. In this way the hot water is circulated at sub-atmospheric pressure for increased safety. The priming vessel is used to fill the circulator and reactor and also to remove air from the system.

8


R.C.C.B O/P HEATPUMP

STIRRER D.C. O/PCIRCULATOR

OUTPUT A.C. ~ 1A MAX

INPUT A.C. ~

MAINS INPUT 240V/1PH/50HZ~

Priming vessel

Rear view showing hot water circulator

2.5 Temperature control of reactor Temperature control is achieved by circulation of heated or chilled water through submersed coils inside the CEM MkII, CEB MkII reactors and the CET MkII. The hot water circulator is supplied as standard with the CEX service unit whilst the chilled water circulator (CW-16) can be supplied as an accessory. A temperature sensor is designed to be used individually with the CEM MkII and the CET MkII in conjunction with the automatic temperature controller in the control console. The sensor transmits a signal to the controller which then modulates power to the heating element in the circulator, increasing or reducing the amount of heat put into the circulating water. The CEB MkII is supplied with its own temperature sensor. It is possible to run the reactors at temperatures below ambient by disconnecting the hot water circulator and connecting the flexible hoses from the chilled water circulating accessory (CW-16). A jack plug on the control console provides power to the solenoid valve of the chilled water circulator. To do this the switch on the console must be set to the “CHILL” position.

9


Ensure Mains Switch is OFF

armfield

TEMPERATURE CONTROL

1

0

CHILL

HEAT

DATA O/P

CONDUCTIVITY mS

SOL.

out 1

MTW 11lae

°C

Temperature controller

Data logging output

Output socket to drive CW16 chiller

Conductivity display

2.6 Conductivity measurement of reactor contents A conductivity probe is supplied to be used individually with any of the reactors. The conductivity is displayed on the meter in units of milliSiemens/cm. During a chemical reaction, the conductivity of the reacting solution changes as more of the reactants are converted. This can be monitored and used to determine the degree of conversion and the rate of conversion.

The conductivity measurement is available for data logging.

2.7 Reactor fitment Each of the three chemical reactor modules is mounted on identical PVC baseplates which are designed to stand on the plinth in the space provided and to be secured to the base by thumbnuts. Full fitment details for each of the reactors is given in the appropriate reactor manual.

2.8 Mainsplate at rear of plinth In order to use the unit all the circuit breakers and the RCD should be in the ON (up) position.

Mains outlet fora logger




INPUT A.C. ~


Circuit breakers

HWC connection

Stirrer output

dat

Mains inconnector

Residual currentdevice

10


3. OPERATION The apparatus must be set up in accordance with the installation sheet supplied (see Appendix A for details). Additionally, ensure that you have read the safety information at the beginning of this manual.

3.1 Switching-on the unit The unit is switched on using the switch on the front of the unit. The circuit breakers and RCD device located at the rear of the unit should be turned on beforehand. Both the temperature controller and conductivity display should illuminate.

3.2 Filling the feed tanks Lift the feed tank lids and pour solutions in from above. A drain tap is located at the base of each vessel in order to drain residual liquid.

3.3 Controlling the feed pumps For normal use the feed pump is set to MANUAL and controlled using the rotary switch next to the pump head. Turning the dial clockwise increases pump speed. The pump can be switched off by reducing the pump speed to zero or by changing the switch to the REMOTE position.

FRONT VESSELSpeed control

Manual/remote switch

Data logging port

armfield

Lid

Drain valve foreach tank

On/off switch

11


3.4 Operation of the stirrer (CEM MkII and CEB MkII) Operation is similar to the two feed pumps. Speed is adjusted using the rotary switch when the selector switch is set to manual.

Speed control

Manual/remote switch

Data logging port

3.5 Operation of temperature controller

TEMPERATURE CONTROL

1

0DATA O/P

CONDUCTIVITY mS

out 1

MTW 11lae

°C

1

3

2 4

Temperature is displayed in °C. The set-point temperature is shown by pressing button 1 and the value adjusted up and down using buttons 2 and 3 respectively. The display will revert to the process temperature after a short period. A light in the top left hand corner of the display (4) indicates when the controller output is active.

3.6 Operating the console When the CEX is used with the hot water circulator then switch 9 should be positioned to heat. It is used in the chill position when CEX is used in conjunction with the CW16 chiller. Also control for the CW16 chiller solenoid valve should be plugged into socket 10. Temperature in the reactor is displayed on the controller (5). The hot water circulator is turned on using switch 6. Conductivity is displayed on the meter (7) and can be remotely logged from socket 8. Note: when using the chiller the temperature controller parameters should be changed in accordance with the Routine Maintenance section.

TEMPERATURE CONTROL

1

0

CHILL

HEAT

DATA O/P

CONDUCTIVITY mS

SOL.

out 1

MTW 11lae

°C5

87

6

109

12


3.7 Calibrating the feed pumps Both peristaltic pumps require calibration so that exact flow rates are known. Calibration should be carried out for both pumps since there may be small differences between them. Fill both reagent vessels. Set the feed pump to 2.0 and determine the flow rate by measuring the volume collected for a defined period. Repeat the procedure for 4.0, 6.0, 8.0 and 10.0 and plot flowrate versus pump speed.

3.8 Operating the CEM MkII The reactor has a turbine agitator (11) and baffle (12) arrangement for efficient mixing and heat transfer. Temperature in the reactor is controlled by circulating heating or cooling liquid through the internal coil (13). The liquid level in the reactor is controlled by the position of the stand-pipe (14). This can be adjusted by loosening the back nut (15). To operate at full volume the standpipe is pushed upwards until the mark etched on the tube is level with the bottom of the back nut. A stop on the standpipe limits the lower operating limit to half the full volume.

SCORE MARK

CEM CONTINUOUS STIRRED TANK REACTOR

11

13

16

15

14

12

When the reactor is not being used it can be drained through the valve (16).

13


4. SPECIFICATIONS

4.1 Overall dimensions: Height: - 0.60m Width - 1.00m Depth - 0.50m

4.2 Electrical supply: CEX-A CEX-B CEX-G Green/yellow lead Earth (Ground) Earth (Ground) Earth (Ground) Brown lead Live (Hot) Live (Hot) Live (Hot) Blue lead Neutral Neutral Neutral Fuse rating 13A 15A 13A Voltage 220-240V 110-120V 220V Frequency 50Hz 60Hz 60Hz

4.3 Pin connections Data logging connectors. Data logging via the telephone sockets is available for Pump speeds, stirrer speed and conductivity. Pin connections are as follows: Pin Pump 1 Pump 2 Stirrer speed Conductivity 1 Reserved Reserved Reserved Reserved 2 Not used Not used Not used +12V 3 Signal (0-5V) Signal (0-5V) Signal (0-5V) Signal (0-5V) 4 0V 0V 0V 0V 5 Not used Not used Not used -12V 6 Reserved Reserved Reserved Reserved

Hot water circulator connector has the following pin connections (See also electrical drawing CBM29654): Pins Function A-D 1kW supply to heater element E-H Not used J-K Thermostat/Level L-M 9V to pump N-T Not used U-V Earth W-Z 1kW supply to heater element

14


4.4 Miscellaneous Peristaltic pump flow rate: 0-95 ml/min per pump Feed tank capacity 5 L per tank

15


5. ROUTINE MAINTENANCE To preserve the life and efficient operation of the equipment it is important that the equipment is properly maintained. Regular maintenance of the equipment is the responsibility of the end user and must be performed by qualified personnel who understand the operation of the equipment.

5.1 General The equipment should be disconnected from the electrical supply when not in use. After use the feed tanks, reactor vessel, sump tray and pipework should be washed through with water to remove chemical residues and then drained.

5.2 RCD test Test the RCD by pressing the TEST button at least once a month. If the RCD button does not trip when the Test button is pressed then the equipment must not be used and should be checked by a competent electrician.

5.3 Calibration of the conductivity sensor The conductivity conditioning circuit (which provides the reading from the conductivity probe supplied with the CEX service unit) is located on a printed circuit board inside the electrical console. This circuit is calibrated before despatch and should not require re-calibration. However, should re-calibration become necessary the appropriate calibration potentiometers can be located using the diagram below. Ensure the equipment has been connected to the electrical supply and switched on for at least 20 minutes. To access the PCB remove the front panel from the electrical console by removing the four fixing screws. It is not necessary to detach the PCB from the front panel. Disconnect the conductivity probe from the socket at the left-hand side of the electrical console. Connect an AC Voltmeter (Range AC mV) to pins 1 and 2 of the vacant socket and adjust potentiometer VR2 on the PCB to give a reading of 50 mV (RMS) on the Voltmeter (probe excitation voltage). Disconnect the Voltmeter then reconnect the probe to the appropriate socket having removed the probe from the appropriate reactor fitted to the CEX. Fill a small beaker with a Conductivity Standard (eg. 0.1M KCI giving a conductivity of 12.88 mS at 25°C) and measure the temperature of the Standard using a suitable thermometer. From the table supplied with the Standard determine the actual conductivity of the solution at the measured temperature. Immerse the probe into the Conductivity Standard in the beaker then adjust potentiometer VR1C to give a reading on the display to match the conductivity of the Standard solution.

16


When the conditioning circuit has been re-calibrated replace the front panel of the electrical console and re-install the probe in the appropriate reactor on the CEX service unit.

5.4 Accessing the electrical circuits inside the plinth Maintenance of the CEX service unit does not require access to the electrical circuits or components located inside the moulded plinth. However, in the event of an electrical problem, it may be necessary for a competent electrician to gain access to the inside of the mouldings as follows: Ensure that the equipment is disconnected from the electrical supply (not just switched off). Drain any liquids contained in the reagent vessels or reactors. Unscrew the channel drain valve located in the recess at the left hand end of the moulded plinth.

17


Carefully remove the front panel from the electrical console by unscrewing the four fixings. Disconnect the electrical connections between the top and bottom plinth sections by disconnecting the appropriate connectors. Unscrew the six fixings around the periphery of the plinth top. Carefully lift the top moulded section away from the bottom moulded section and place the top section in a suitable location. The electrical circuits inside the bottom moulded plinth section are accessible. A circuit diagram showing the mains and DC electrical circuits inside the plinth is included at the rear of this manual to assist in fault finding. Should it be necessary to remove the PCB from inside the electrical console then the PCB connections diagram on page 17 shows the location and function of the electrical connectors on the PCB to aid re-assembly. Re-assembly of the top and bottom moulded plinth sections is the inverse of the above instructions.

5.5 Draining the hot water circulator It is not necessary to drain the hot water circulator following use in normal circumstances. However, if the ambient temperature may fall below freezing, especially if it is intended to transport the equipment to a different location or the equipment is to be placed in long term storage, then the circulator should be drained to prevent damage simply by undoing the connections to the reactor and allowing the water to drain under gravity.

5.6 Temperature controller set-up The temperature controller is a three term controller which has been set up and configured to give the optimum control capability for all three reactor modules. As well as the heating control for operating temperatures above ambient, the controller can be used to operate a chilled water accessory (CW-16) giving reactor temperatures below ambient. If, for any reason, the set up parameters have been altered or corrupted it will be necessary to carry out the following procedure to ensure the optimum settings are restored.

out 1

MTW 11lae

°C 2

3 1

Access to the configuration mode is as follows:- Sequentially press keys (3), (1) and (2) and keep them pressed for 3 seconds.

18


When in configuration mode the parameters can be selected by pressing key (2). To display the value press key (1) and if necessary change using keys (2) or (3). Store the new value by pressing key (1). No key activation within 10 seconds causes the instrument to switch over to basic functioning. The following are the correct parameters for the heating cycle:-

Parameter Heating Cooling 1Lo 0.0 0.0 1hi 50.0 50.0 1hy 0.0 0.0 1Pb -7.5 3.5 1it 90 90 1dt 60 60 1ar 35 35 1ct 04 04 1PF 00 00 2Lo -19.9 -19.9 2hi 99.9 99.9 2hy 0.0 0.0 2ct 05 05 2PF 00 00 dPS 01 01

5.7 Priming the hot water circulator After draining the hot water circulator or changing the reactor vessels it will be necessary to prime the pump again. Refer to the installation sheet supplied with the reactor and also included in the appendix of this manual.

19


6. APPENDIX 1: INSTALLATION GUIDES

6.1 CEM/CEX installation guide

1 MOUNTING THE FEED VESSEL ASSEMBLY

Locating studs and fasteners

Connect the tubing on the left hand side of each of the two feed pumps to the standpipe located in each of the reagent vessels. (Left feed pump to front vessel, right feed pump to rear vessel)

Fit the reagent vessel assembly to the CEX using the 4 locating studs and black hand nuts

2 MOUNTING THE HOT WATER CIRCULATOR (HWC)




INPUT A.C. ~


Rear view of CEX showing positioning of HWC

The lead from the HWC plugs into the socket indicated. Carefully line up the pins in the plug with the socket. Once connected rotate the locking collar on the plug until it clicks into position

Hoses on the HWC should be orientated as shown in the diagram

20


3 - Fit the CEM MkII assembly to

the CEX using the 4 locating studs and black thumbnuts. The reactor is supported by 3 pillars, position the reactor on the CEX so that a single pillar support is foremost

- Connect the remaining two pipes from the feed pumps to the connectors on the base of the reactor as shown.

- Connect the conductivity probe and temperature sensor plugs to the sockets on the left hand edge of the control console. Connect the stirrer plug to the socket located on the rear of the CEX.

- Fit the conductivity and temperature sensors to the CEM. Each probe fits in a gland. The gland nut should be loosened to fit the probes and then tightened to secure them. Probes should reach the bottom of the reactor

armfield


CEX


TEMPERATURE CONTROL

1

0

CHILL

HEAT

DATA O/P

CONDUCTIVITY mS

SOL.

out 1

MTW 11lae

°C

CEM CONTINUOUS STIRRED TANK REACTORTemperature

probe

Conductivity probe

Stirrer plug

BOTTOM OF COIL

TO TOP OF COIL AFTER PRIMING

CONNECTION TO ELECTRICITY SUPPLY 4

MOUNTING THE CEM MKII ONTO THE CEX

Brown - Live (hot) Blue - Neutral (hot) Green/yellow - Earth (ground)

Check that the voltage specified on the equipment matches the supply voltage. NOTE: this unit MUST be earthed.


armfield

TEMPERATURE CONTROL

1

0

CHILL

HEAT

DATA O/P

CONDUCTIVITY mS

SOL.

out 1

MTW 11lae

°C




INPUT A.C. ~


Ensure that circuit breakers and RCCD are ON (up)

21


5 PRIMING THE HOT WATER CIRCULATOR

- Connect suction pipe of the HWC

to a cold water supply (preferably deionised).

- Switch on the mains switch on the front of the CEX.

- Adjust the temperature controller set-point to a temperature below ambient (see Operation instructions overleaf).

- Then switch on the pump switch at the side of the temperature controller.

Suction pipe

CONNECTING THE HWC TO CEM MKII 6

Priming vessel

CEM CONTINUOUS STIRRED TANK REACTOR

1

2

- Connect suction pipe of the HWC (1) to the connection for the top of the coil (rear).

- Connect the supply pipe of the HWC (2) to the connection for the bottom of the coil (front).

- Turn on the mains switch and then the pump switch and refill the HWC expansion tank as required.

7 CONNECTING TO THE DATA LOGGER (OPTION)

armfield


CEX

TEMPERATURE CONTROL

1

0

CHILL

HEAT

DATA O/P

CONDUCTIVITY mS

SOL.

out 1

MTW 11lae

°C

IFD6INTERFACE CONSOLE

armfield

4

8MAINS

SOCKET 1 POWER

1

5

2

6

3

7

WARNING 240V~240V 2A~ SOCKET 2 POWER 240V 2A~

o

I

o

I

o

I

- The IFD is powered from the mains outlet on the rear of the CEX.

- Connect channels as shown

Ch2 Ch3 Ch4 Ch1

22


6.2 CET/CEX installation guide

1 MOUNTING THE FEED VESSEL ASSEMBLY

Locating studs and fasteners

Connect the tubing on the left hand side of each of the two feed pumps to the standpipe located in each of the reagent vessels. (Left feed pump to front vessel, right feed pump to rear vessel)

Fit the reagent vessel assembly to the CEX using the 4 locating studs and black hand nuts

2 MOUNTING THE HOT WATER CIRCULATOR (HWC)




INPUT A.C. ~


Rear view of CEX showing positioning of HWC

The lead from the HWC plugs into the socket indicated. Carefully line up the pins in the plug with the socket. Once connected rotate the locking collar on the plug until it clicks into position

Hoses on the HWC should be orientated as shown in the diagram

23


armfield

TEMPERATURE CONTROL

1

0

CHILL

HEAT

DATA O/P

CONDUCTIVITY mS

SOL.

out 1

MTW 11lae

°C


CEX

TEMPERATURE PROBE AT REAR


TEMP

COND

CEB (OPTION)

3 MOUNTING THE CET MKII ONTO THE CEX

- Fit the CET MkII assembly to the CEX using the 4 locating studs and black thumbnuts. Position the reactor so that the non-return valve is on the left hand side of the reactor towards the rear.

- Connect the remaining two pipes from the feed pumps to the connectors on the lid of the reactor as shown.

- Connect the conductivity probe and temperature sensor plugs to the sockets on the left hand edge of the control console.

- Fit the conductivity sensor into the housing on the top of the reactor as shown. The temperature sensor fits into a gland on the reactor lid. In both cases the gland nut should be loosened to fit the probes and then tightened to secure them. Probes should be inserted fully so that they are submerged and flow holes in the conductivity probe glass should be positioned so that liquid flows through.

4 CONNECTION TO ELECTRICITY SUPPLY




armfield

TEMPERATURE CONTROL

1

0

CHILL

HEAT

DATA O/P

CONDUCTIVITY mS

SOL.

out 1

MTW 11lae

°C




INPUT A.C. ~



24


5 PRIMING THE HOT WATER CIRCULATOR

- Connect suction pipe of the HWC to a cold water supply (preferably deionised).

- Switch on the mains switch on the front of the CEX.

- Adjust the temperature controller set-point to a temperature below ambient (see Operation instructions overleaf).

- Then switch on the pump switch at the side of the temperature controller.

Suction pipe

CONNECTING THE HWC TO CET MKII 6

Priming vessel

- Connect suction pipe of the HWC (1) to the overflow pipe mounted high on the side of the reactor

- Connect the supply pipe of the HWC (2) to the non-return valve mounted low down on the left rear side of the reactor.

- Fill the reactor with water, preferably deionised, using the fill plug on the top plate of the reactor. Refit the plug.

- Turn on the mains switch and then the pump switch and refill the HWC expansion tank as required.

1

2

Connect inlet pipe (1) to here

Connect outlet pipe (2) to here

7 CONNECTING TO THE DATA LOGGER (OPTION)

- The IFD is powered from the mains outlet on the rear of the CEX.

- Connect channels as shown. Stirrer channal unused with this reactor configuraton

armfield


CEX

TEMPERATURE CONTROL

1

0

CHILL

HEAT

DATA O/P

CONDUCTIVITY mS

SOL.

out 1

MTW 11lae

°C


armfield

4

8MAINS

SOCKET 1 POWER

1

5

2

6

3

7


o

I

o

I

o

I

Ch2 Ch3 Ch4 Ch1

25


6.3 CEB/CEX installation guide

1 MOUNTING THE CEB ONTO THE CEX

armfield

TEMPERATURE CONTROL

1

0

CHILL

HEAT

DATA O/P

CONDUCTIVITY mS

SOL.

out 1

MTW 11lae

°C


CEX

TEMPERATURE PROBE AT REAR


TEMP

COND

CEB (OPTION)

The reactor vessel is set on a baseplate which is itself located on four studs on the service unit and secured by thumbnuts. The hot water circulator and feed tanks provided with CEX are not required with the batch reactor configuration.

- The CEB is supplied with its own temperature sensor which fits in the socket on the side of console dedicated to this purpose. The sensor will not fit any other socket. Plug in the sensor then insert the sensor into the vessel through the appropriate gland on the reactor lid.

- The standard conductivity sensor provided with CEX is used with CEB. Plug this in to the appropriate socket on the side of the control console then insert the sensor through the remaining gland into the reactor.

- Ensure that both sensors are inserted fully into the vessel without fouling the wall or other components. Both sensors are secured in the correct position by tightening the gland nut.

2 CONNECTING TO THE ELECTRICITY SUPPLY







INPUT A.C. ~



armfield

TEMPERATURE CONTROL

1

0

CHILL

HEAT

DATA O/P

CONDUCTIVITY mS

SOL.

out 1

MTW 11lae

°C

26


27

The chiller unit is used when operating temperatures at or below ambient are required. - The feed and return hoses for the chiller are connected to the heating coil

within the reactor. Connections are made through the reactor lid. - The plug for the chiller solenoid valve connects to the socket on the front of

the control console (see ‘OPERATING THE CONSOLE’ page 12). - Switch the switch on the control console to ‘CHILL’ - Note: when controlling the reactor temperature (Isothermal operation) it is

essential that the temperature sensor supplied with the is used, not the STS4 temperature sensor supplied with CEB

CONNECTING THE CEB TO THE CHILLER 3

- To enter configuration mode, sequentially press keys (3), (1) and (2) and keep them pressed for 3 seconds.

- Parameters are selected using key (2) and the parameter value by pressing key (1). Changes are made by pressing keys (2) or (3) and the new value stored by pressing key (1).

- Parameter values required for chiller operation are: Param Value Param Value Param Value Param Value 1Lo 0.0 1it 90 1PF 00 2ct 05 1hi 50.0 1dt 60 2Lo -19.9 2PF 00 1hy 0.0 1ar 35 2hi 99.9 dPS 01 1Pb 3.5 1ct 04 2hy 0.0

TEMPERATURE CONTROL

1

0

DATA O/P

CONDUCTIVITY mS

out 1

MTW 11lae

°C

1

3

2

CONNECTING TO THE DATA LOGGER (OPTION) 5


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4

armfield


CEX

TEMPERATURE CONTROL

1

0

CHILL

HEAT

DATA O/P

CONDUCTIVITY mS

SOL.

out 1

MTW 11lae

°C


armfield

4

8MAINS

SOCKET 1 POWER

1

5

2

6

3

7


o

I

o

I

o

I

- The IFD is powered from the mains outlet on the rear of the CEX. - With CEB the two feed pump channels need not be connected. - Connect the stirrer to channel 4, conductivity to channel 1 and the CEB

temperature sensor to channel 5 (Adiabatic operation using the CEB’s STS4 temperature sensor). Temperature logging is not possible nor necessary when operating the reactor isothermally.

CONFIGURING THE TEMP CONTROLLER FOR OPERATION WITH CHILLER


Electrical diagram of the hot water circulator

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