JB Series and SUB Aqua Pro Operating Manual V2

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Contents 1 2 3 4

Use of products How to use this operating manual Product registration and warranty Safety information 4.1 Safety compliance 4.2 Safety symbols 4.3 Safety warnings 5 Operating instructions 5.1 Unpacking instructions 5.2 Assembly of the equipment and components 5.3 Installation 5.4 Electrical supply 6 Operating procedures 6.1 Operation 7 Using the water bath 7.1 Using the JB Academy 7.2 Using the JB Nova 7.3 Using the SUB Aqua Pro 8 Calibration 8.1 Calibration options 8.2 Single point calibration 8.3 Dual point calibration 9 Technical specifications 10 Technical tips 10.1 Which water should you use in your bath? 11 Warranty information 12 Maintenance and service 12.1 Cleaning 12.2 Fuses 12.3 Service 13 Compliance 13.1 WEEE directive 13.2 RoHS directive 13.3 Electrical safety and electromagnetic compatibility

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1 Use of products The following products are covered by this operating manual: JB Academy range: JBA5, JBA5 AUS, JBA12, JBA12 AUS, JBA18 & JBA18 AUS

JB Nova range: JBN5, JBN5 AUS, JBN5 US, JBN12, JBN12 AUS, JBN12 US, JBN18, JBN18 AUS, JBN18 US, JBN26, JBN26 AUS & JBN26 US

SUB Aqua Pro range: SAP2, SAP2 AUS, SAP2 US, SAP2S, SAP2S AUS, SAP2S US, SAP5, SAP5 AUS, SAP5 US, SAP12, SAP12 AUS, SAP12 US, SAP18, SAP18 AUS, SAP18 US, SAP26, SAP26 AUS, SAP26 US, SAP34, SAP34 AUS, SAP34 US, SAPD, SAPD AUS & SAPD US

The products listed above are a general purpose series of thermostatically controlled unstirred water baths designed for indoor laboratory use by a professional user.

2 How to use this operating manual This operating manual will allow you to unpack, set up and operate this water bath correctly and safely. Important safety information, symbols and warnings are listed below and should be read carefully. If there is a technical matter that this operating manual does not address, or any other questions concerning this product, please contact Grant Instruments or your local distributor who will be able to provide any additional information.

3 Product registration and warranty The warranty for this water bath is detailed in section 8 but to register you should complete the on-line registration form at www.grantinstruments.com. Not registering your product may affect your warranty.

4 Safety information 4.1

Safety compliance

Grant water baths meet the requirements of international safety standard IEC 61010 – “Safety requirements for electrical equipment for measurement, control, and laboratory use”. They also comply with the equivalent national standards including: EN 61010-2-010 UL 61010A-2-010 CAN/CSA-C22.2 NO. 61010-2-010-04.

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4.2

Safety symbols

The symbols below are marked on the equipment to indicate:

Caution: Surfaces and water can be hot during and after use Read this manual before using the bath Important safety warning Recommended operation Failure to follow may affect the performance of the equipment

4.3

Safety warnings

Read the whole of the instructions. Safety may be impaired if they are not followed.

Surfaces and water can be hot during and after use. Before emptying a bath, allow the water temperature to fall to a safe level. For 12, 18, 26, dual & 34 litre baths, empty the bath before moving it. This bath is only intended for use with water. Use of other fluids may invalidate warranty and present a risk of fire or explosion. Place on a stable flat surface to reduce the risk of accidental spillage. No user serviceable parts. Risk of electric shock after disassembly or operation with covers removed. Not for use in environments with a risk of flammable or explosive gases. To be operated within the limits listed in this guide Only use the mains cord provided or one with an identical rating. Ensure that the mains plug and the switch are easily accessible. A clearance of >10cm around the bath is required to ensure adequate air flow. If a potentially hazardous liquid is spilt onto the equipment, disconnect it from the power supply and have it checked by a competent person. It is the user’s responsibility to carry out appropriate decontamination if hazardous material is spilt on the equipment. Clean the outside of the equipment with a damp cloth, using water and domestic cleaning products only. The use of other chemical cleaning agents may damage the equipment. Always follow the manufacturer’s instructions and any applicable legislation about the use of potentially hazardous substances. To preserve your water bath in peak condition consult the extra guidance listed below. Failure to do so may affect your warranty. Consult online JB Academy, JB Nova and SUB Aqua Pro Detailed operating manual www.grantinstruments.com

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resources for additional important information. For optimum performance prevent tray from touching bath sides. Before first switching on the bath please remember to fill the bath with water. Switching the bath on dry can damage the heater and could invalidate the product warranty. If the equipment has been transported or stored in cold or humid conditions, condensation may form inside it. If that could have happened, allow time (at least 2 hours at room temperature) for the condensation to evaporate before using the equipment. When operating the bath in high ambient temperatures (> 30°C) the temperature of the water used to fill the bath should be no more than 10°C below the ambient.

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5 Operating instructions 5.1

Unpacking instructions

Standard equipment includes:  Thermostatic water bath  Mains cord with plug  Gabled polycarbonate lid (excludes JB Academy, no lid supplied and SAP34, stainless steel lid supplied)  Polycarbonate base tray(s) (excludes SAP34, stainless steel base tray)  Short user guide Remove packing materials carefully, and retain for future shipment or storage of the equipment. 5.2

Assembly of the equipment and components

The water bath has three main components, the bath, the lid and the base tray. The base tray fits into the bath with the feet downward so that it creates a gap between the bottom of the tank and the tray.

For optimum temperature stability, avoid allowing the base tray to touch the sides of the tank.

The lid should only be lifted by the handle, as other parts can become hot during use. It also has a vent/thermometer hole – this hole should not be sealed as pressure could build up inside the bath. 5.3

Installation

Place the water bath on a level, non-combustible surface. Ensure that the mains plug and the switch are easily accessible. 5.4

Electrical supply

Check that the supply voltage marked on the serial number label, and the type of mains plug, are correct for your mains supply outlet, which must have a ground connection. To disconnect the equipment from the mains supply, remove the mains plug from the mains supply outlet.

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6 Operating procedures 6.1

Operation

6.1.1

Water level

The bath will provide optimum performance when filled to the swage line which is typically 25mm below the top of the tank. Do not fill above the swage line. The water level used in the tank will influence the temperature accuracy and stability. Using liquid levels below the swage line needs consideration, especially when operating at higher water temperatures (>50ºC) and without a lid. We recommend the following minimum fill levels Tanks size 2LS 2L 5L 12L 18L 26L 34L

Recommended min % fill 80%

40%

Approximate water depth (mm) 32 50 50 50 50 70 70

Table 1 - Recommended minimum fill levels When using a larger bath with vessels which only require a shallow immersion, we recommend filling the bath as close to the swage line as possible and using raised shelves in the bath to elevate the vessel to the desired immersion depth. 6.1.2

Operating the bath without water (dry start)

Do not attempt to use your bath without water in the tank. The bath has an inbuilt protection mechanism known as dry start protection which will detect this condition in most circumstances and prevent the bath from continuing to heat. In this instance the bath will display “dry” and sound an alarm.

The tank internal surface can become very hot if an accidental dry start has occurred, even if the dry start cut out has operated. Avoid touching the tank until it has been left to cool for several minutes.

Once you have filled the bath, you will need to switch the bath off and on in order to resume operation.

Repeated dry starting of the bath stresses key components in the bath which can affect service life and the equipment’s warranty.

The bath also includes an independent safety temperature cut-out which will protect the bath in the unlikely event of a fault or if the dry protection is switched off (see section JB Academy, JB Nova and SUB Aqua Pro Detailed operating manual www.grantinstruments.com

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6.1.5). If the cut-out is activated then the bath will stop heating, show 'OtC' on the display and sound an alarm. The bath should be switched off, unplugged and allowed to cool for at least 30 minutes. The cut-out can be reset by a suitably qualified technician. 6.1.3

Operation above 60°C

The lid must be used above 60°C to maintain proper temperature control and to ensure that the water temperature reaches the set point The lid will also prevent excessive evaporation that requires the bath to be filled more often and will save energy. 6.1.4

Flat bottomed vessels

Do not place flat-bottomed vessels or other objects directly on the bottom of the tank. Always use the base tray. This avoids possible damage to the heater mounted under the tank. The base tray also improves temperature control. 6.1.5

Allowing the bath to run dry (run dry protection)

Always take care to avoid allowing the water to evaporate to the point that the bath runs dry. This can lead to the bath’s internal safety cut-out operating requiring a suitable qualified technician to reset it. The bath has a built-in advanced detection mechanism to greatly reduce the chances of the safety cut out occurring in most circumstances where the bath is left to accidentally run dry. This feature is only enabled automatically when the following criteria are met: 

The set temperature is >50°C



The bath has been operating for a least one hour



The water is not set to boiling point (>=99ºC)

If the bath detects signs that the bath water level may be becoming low, it will alert the user by displaying “dry” and sounding an alarm Once you have checked the water level and topped up the water level as necessary you will need to switch the bath off and on in order to resume operation. For users with specialist applications where this feature maybe unnecessarily triggered it can be disabled. Press the set key to enter the bath menu and use the arrow keys to select dpA (dry protection alarms). Press the set key and use the arrow keys to select off. Use the set key to confirm that the dry start and run dry protection are switched off. 6.1.6

Emptying the baths

Before emptying any bath allow the water temperature to fall to a safe level and take reasonable precautions to prevent accidental spillage. Larger baths have drain taps to make emptying easier.

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To empty the bath using the drain tap, push the supplied drain insert into the drain tap. Note that the water will begin to empty as soon as the drain insert is fully engaged. A length of hose can be added to the barbed end of the drain insert if required. 6.1.7

Using the SAPD bath

The SAPD bath provides two baths side by side that will control at different temperatures independently of each other. The difference between the temperatures of the two baths should be kept to less than 30ºC to ensure specified bath performance. The set temperature difference between the baths can be greater than 30ºC but the following should be taken into account: 

Setting a higher temperature on the smaller bath will reduce energy use and ensure optimum bath performance



Each bath may require additional time for temperature stabilisation (particularly the lower temperature bath)



Each bath temperature should be verified with an independent thermometer to ensure accuracy is fit for purpose (particularly the lower temperature bath)

If only one of the baths is in use then the performance will be as specified.

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7 Using the water bath 7.1

Using the JB Academy

7.1.1

Bath controls

Alarm indicator Display Keypad lock

Up, down and set keys

7.1.2

Indicators

There are two indicators:  Main display – used to show temperature and short messages  Warning (red when lit). Marked 7.1.3

Setting the control temperature

The water temperature of the bath can be set using the main display. The following example shows setting the water bath to 37.0°C. Note that once the set point is entered the bath shows a scrolling bar display indicating the bath is heating. Once the bath is with 1°C of the set temperature this will change to displaying the actual water temperature in the bath.

oC 0.0 37.0

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Figure 1 - Setting the bath temperature 7.1.4

Enabling the keypad lock

The keypad lock is intended to help users avoid accidental changes to the set point temperature of the bath. To enable and disable the lock, press and hold the lock and up or down keys for three seconds as shown below

Locked

Unlocked

Figure 2 - Locking and unlocking the keypad

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7.2

Using the JB Nova

7.2.1

Bath controls

Alarm indicator Display Keypad lock

Drain

7.2.2

Up, down and set keys

Setting the control temperature () and keypad lock

Setting the control temperature and keypad lock features on the JB Nova uses the same method as the JB Academy model. Follow steps outlined in sections 7.2.1 and 7.2.2.

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7.3

Using the SUB Aqua Pro

7.3.1

Bath controls

Alarm indicator Heater indicator Over temperature key

Drain

7.3.2

Preset keys

Up, down and set keys

Setting the control temperature

Setting the control temperature on the SUB Aqua Pro bath uses the same method as the JB Academy model. Refer to section 7.1.3. On SUB Aqua Pro models the heater indicator will periodically illuminate to show the bath is heating. 7.3.3

Enabling the keypad lock

The control panel can be locked by pressing the set and up keys simultaneously for at least 3 seconds. The display will show “LOC” to confirm that the keypad has locked. The control panel can be unlocked by pressing the set and down keys simultaneously for at least 3 seconds. The display will show “OPR” to confirm that the keypad is operational.

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7.3.4

Setting the over temperature alarm

The over temperature alarm can be used to protect samples by setting a maximum temperature limit the bath is allowed to heat to. If the bath exceeds this temperature, it will stop heating, display “OtA” (over temperature alarm) and sound an alarm The alarm can be silenced by pressing the set key. Allow the bath to cool down before switching the bath off and on to resume normal operation. Note that if the cause of overheating is an incorrect set point, this will need to be corrected otherwise the alarm will operate again. You should set the over temperature value, allowing for a safety margin to the sample maximum temperature limit if possible. Additionally the OTA limit should be greater than the bath set point to avoid nuisance alarms. Grant recommends this is at least 1°C. To set the over temperature alarm:

oFF

If an over temp value has already been set the display will show the value and not off.

70.0

Set the value you wish to use – in this case 70ºC

37.0

The OTA is now set and the bath will display the current water temperature

Figure 3 - Setting the over temperature alarm To disable the alarm, set the over temperature alarm limit to 10.0°C and then press the down button one further time so the display shows “oFF”. Save this by pressing the over temperature alarm key. 7.3.5

Configuring and running temperature presets

Temperature presets allow you to conveniently store bath temperature settings you routinely use. The bath has 3 presets, numbered 1 to 3. You can set the bath to the value stored in the temperature preset by pressing the preset button you require, followed by set. Before you can use presets you need to store the values you wish to use in at least one of the presets using the following sequence:

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1

1

Pr1

Select the preset you wish to set

70.0

Set the value you wish to use – in this case 70ºC

37.0

Press the preset to store the value and the bath with automatically return to displaying the water temperature

Figure 4 - Configuring a preset value

7.3.6

Setting the countdown timer

A countdown timer can be set in the range of 1 to 999 minutes. The countdown timer will sound an alarm at the end of a countdown period. It can be used to time experiments or remind you to take a further action. Note the countdown timer does not take into account if the bath has not reached the set temperature. If the bath has not reached the set temperature, this will need to be taken into account when starting the countdown timer.

When the countdown timer expires the bath will sound an alarm and display “End”. Press SET to silence the alarm.

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To set the countdown timer: -

oC cdt oFF

10.0

37.0.

Select the menu option

Select the countdown timer menu option

If a countdown timer value has already been set the display will show the value and not off. Set the value you require – in this case 10 minutes

Press the set key to start the timer. The bath with automatically return to displaying the water temperature. An extra dot at the end of the temperature will flash to show the timer is operating

Figure 5 - Setting the countdown timer

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8 Calibration 8.1

Calibration options

Two calibration options exist:  

Single point calibration (available on all models) Dual point calibration (available on SUB Aqua Pro models only)

The quality of the calibration is highly dependent on: Use of a suitable reference thermometer, ideally 10 times the accuracy you are trying to achieve. Performing a calibration in a stable ambient environment (+/-1ºC) free from draughts or cooling air currents.

8.2

Single point calibration

A single point calibration applies a single offset over the bath temperature curve. For this reason the calibration temperature is usually the same as the intended working temperature for the bath or particular experiment:

To configure a single point calibration: Firstly, set the bath to the desired set point and leave to stabilise for at least an hour. Place the reference thermometer either in the centre of the bath, or if using a lid, through the thermometer hole. Note the temperature shown by the reference thermometer and enter it into the calibration menu by following the steps below.

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oC

Select the menu option

Select single point calibration Press set to enter the calibration value

Enter the reference thermometer value

Press set to store the calibration value

Leave the bath to stabilise and check the calibration

Figure 6 - Setting a single point calibration

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8.3

Dual point calibration

Dual point calibration is typically used on baths which are operated over a range of temperatures. Two calibration points are entered into the calibration menu: the low calibration point (LCP) and high calibration point (HCP). These points are typically selected as just below and above the normal working temperature range for the bath.

To configure a dual point calibration, follow the steps below.

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Select the menu option

LPC

Select the lower point calibration Press set to enter the calibration value

Enter the reference thermometer value

Press set to store the calibration value

Leave the bath to stabilise and check the calibration

Figure 7 - Setting the low calibration point

Set the bath to the upper working temperature and allow to stabilise for at least an hour. Note the value of the reference thermometer.

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