Fit the (optional) pH probe holder to the stem of the pH probe. Do not flex or bend the probe stem as it may break! Press the up and down arrows to select the required brightness. Brightness levels are shown in the pH window. Press the settings button to complete the change. Step 5: Calibrate pH Probe Long-term, the two pH LEDs located to the right of the pH read-out display will keep you informed of the pH calibration status. Consult the full instruction manual for full details on the different statuses. Effectively, if both LEDs are not lit permanently then calibration of some form is required.

The reading settles after about 30 seconds so wait for a short while for EC to stabilise. Is the Bluelab pH Probe fully submersible? The alarm function will warn you with a flashing LED when readings drop below, or rise above, a pre-determined value. To set the alarm hold the alarm button until the letters 'AL H' are displayed in each of the three display windows. As soon as you take your finger off the button, the current highest values will be displayed in the three windows. Use the unit buttons to select which parameter you wish to adjust and then use the up and down buttons to lower or increase the each maximum parameter value. Remember that you are setting the highest acceptable value. If levels go above this, then the visual alarm will start to flash. Once you've set the high values, press the alarm button to move onto the low values and repeat the process. Press the alarm button again and your chosen parameters will be saved. After 30 days the LEDs will flash indicating calibration of the pH probe is required. Placement of probes: How to clean Bluelab conductivity (EC/PPM) probes- Clean and calibrate your conductivity probe monthly. In just one glance the Guardian Monitor measures all three critical parameters to successful growth; pH, conductivity and temperature. Seasonal changes, sunlight hours, wind, inherent plant growth; from vegetative to fruiting; are all influencing factors to plant growth success. More importantly...these parameters change the plants uptake and need of water and specific nutrient elements. The Bluelab Guardian is a constant indicator of the desired levels of EC, pHand temperature, enabling the grower to optimise these parameters as the crop progresses through each growing phase.

The Bluelab Guardian Monitor is a continuous indicator of the current levels of EC, pH and temperature of your nutrient solution, enabling you to optimise these parameters as your crop progresses through each growing phase. Features

The Bluelab Guardian can be mounted in a suitable area, using the 4 supplied screws. Make sure that it is placed in an area that will allow the probes to reach the reservoir tank comfortably – no further than two meters away. Two cable ties are supplied with the unit, which can be used to mount it to a support or hanging bar. Avoid positioning the Guardian in areas of direct sunlight. Though the unit is water resistant, you should also avoid positioning it in areas where it can easily be splashed with nutrients. Mineral salt deposits can be corrosive and cause damage over long periods of time. Choose the correct plug adapter from the supplied selection, connect it to the Guardian's power supply, then connect the power supply to the underside of the main unit. Attach the pH probe to the underside of the unit, by inserting and twisting. The temperature / conductivity probe is supplied pre-attached. The unit can now be powered up at the mains supply. Yes, both the Bluelab Conductivity/Temperature Probe and the Bluelab pH Probe are fully submersible. Is the Bluelab pH Probe replaceable? Your settings are saved if power is lost. Better yert, no calibration's needed for your CF or temperature. To calibrate your pH, there's one simple button. This salt crust is normal and will not harm the probe or meter. Gently rinse the salt off under fresh running water. It is essential to ensure that your probe has sufficient KCl in the storage cap at all times to remain hydrated. How often do I have to clean the probes?

Both the pH pen/probe and the storage cap contain KCl (Potassium Chloride) solution. The result of a small level of evaporation of KCl is the formation of a salt crust as KCl is a type of salt. To select your desired conductivity unit, hold the unit button, located next to the conductivity display, down for 3 seconds. This process will trigger a move to the next unit of measurement, as indicated by the 3 LEDs to the right of the display. Repeat this process until you have arrived at your chosen unit of measurement. Repeat the whole process again for your choice of temperature measurement. Monitor your nutrient pH, CF & temperature 24 hours a day with Bluelab Guardian. All readings are live! Before doing anything, you should soak the pH probe in KCL (potassium chloride) solution for 24 hours. This is very important!