JBL JBL PROFLORA CO2 REGULATOR BASIC Manual Download Page 13

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8.2

Return function

If no key is pressed for 30 seconds the display automatically returns to the value overview� Any values not confirmed by OK will not have been stored�

8.3

Sleep mode

If no key is pressed for 10 minutes, the display backlighting fades to the lowest setting� When you tap the display, it switches back to the previously

set brightness level�

8.4 Cleaning

The surface of the device may be cleaned with a soft, slightly damp cloth� Do not use cleaning agents� Do not immerse the device in water!

8.5

Power failure

In the event of a power failure, all the values previously set will remain stored� Only the time calculation for the calibration reminder is interrupted

during the power failure�

8.6

Use of JBL

PRO

FLORA CO₂ CONTROL in combination with calcium reactors in marine water

Calcium reactors are tasked with dissolving the lime out of the substrate within the reactor (e�g� coral gravel), and returning it as carbonate hardness

into the marine water aquarium� Thus they counteract the consumption of KH in the aquarium and no KH supplements need to be added� The KH of

natural marine water in oceans is between 6 and 9 °dKH, depending on the ocean� CO₂ is the best way to effectively release KH from the substrate in

the calcium reactor� This process requires a pH level of approx� 6�5 inside the calcium reactor, which needs continuous monitoring�
For calcium reactors which have an opening for pH sensors, this is very easy:
All you have to do is install the pH sensor there and set the pH set point on the

JBL

PRO

FLORA CO₂ CONTROL

to 6�5 (see chap� 7�4)� The connecting

cable for the solenoid valve needs to be connected to the solenoid valve of the CO₂ system, which introduces the CO₂ into the calcium reactor�
For calcium reactors without an opening for a pH sensor, the sensor has to be installed inside the water stream leaving the calcium reactor, by means

of a suitable device� Settings as described above�

9. Note on handling pH sensors

The pH sensor is the most delicate part of the whole measuring equipment and therefore needs special care when handling� If the following few

handling tips are followed, the sensor will provide accurate measurements for a long time�

9.1

Handling and care

• Avoid hard impacts and take particular care when handling the delicate sensor tip made of special glass�
• Avoid kinks in the sensor cable�
• Never allow the sensor tip to dry out!
• Sensors which are not in use for a longer period of time should always be placed in JBL storage solution�
• Never fully immerse the sensor in the water� The sensor cap and cable connection should always be out of the water� Ideally the sensor should be

immersed to the top of the writing on the sensor shaft (JBL pH Sensor)�

• Place the sensor in as dark a place as possible in the aquarium to prevent algae growing on the tip� Algae growth could lead to incorrect measure-

ments�

• Do not lay the sensor cable next to mains current-bearing cables for long distances�
• If the sensor is accidentally pulled out of the water or the water level drops significantly, the device will measure incorrectly and adjust accordingly�

This is dangerous for the fish� Regular checking is therefore recommended�

• Any dirt that has accumulated on the tip of the sensor can be carefully wiped off with a soft cloth� Never rub vigorously, just dab�

9.2

Service life of the sensor

pH sensors are subject to natural wear and tear, also known as ageing� Ageing begins from the day of manufacture� The voltage delivered by the

sensor tip and recorded by the measuring device and transformed into pH units gives an indication of the condition of the sensor� The voltage in mV

(millivolt) can be read directly from the

JBL

PRO

FLORA CO₂ CONTROL

�

When dipped into pH 7�00 buffer solution, a new sensor shows a voltage of 0 +/- a few mV� This voltage changes per full pH unit by about 59 mV in

a positive or negative direction, depending on whether measurements are above or below 7�00� When a new sensor is dipped into pH 4�00 buffer

solution, the voltage is approx� 177 mV� If the sensor has aged, voltage measured at pH 7�00 usually shifts into the negative range�
For example, in 7�00 buffer solution, -28 mV is measured� In addition, the voltage difference per full pH unit decreases� For example, for pH 4�00

buffer solution, 110 mV can still be indicated, which would correspond to a difference of 46 mV per pH unit� For pH 7�00 the

JBL

PRO

FLORA CO₂

CONTROL

accepts a shift of up to 115 mV and a reduction in voltage difference per full pH unit of up to 35 mV� For measurements outside these

limits the sensor is rejected as faulty at the end of the calibration�
The average service life of a pH sensor is 24 months� Depending on handling and care, ageing can be faster or slower� The ageing process is accele-

rated by the continual measurement of extreme pH values, neglected calibration, dirt etc�

9.3

Handling buffer solutions

Each pH measurement is only as good as the calibration carried out� Therefore, in your own interest, please follow the advice below:
• Store the JBL buffer solutions in a cool place and out of the reach of children�
• Always take the amount of buffer solution required for a calibration procedure fresh from the storage bottle�
• Never re-use old buffer solution, always dispose of it at the end of each calibration�
• Never pour used buffer solution back into the storage bottle�

10. Technical data

Display

Touch 2,8“

pH measuring range

pH 3�00 – 9�00� All values outside this range appear as 2�99 or 9�01�

Setting range for pH set point

5,00 – 9,00

Display / pH measurement accuracy

0,01 pH / 0,02 pH*

Temperature measurement range

0,1 – 84 °C

Temperature measurement accuracy