Bluelab Combo Meter Overview Advice FAQ The Bluelab Combo Meter is all that is needed for simple and reliable crop management and it’s all within arm’s reach! The Bluelab Combo Meter is an all-in-one pH, conductivity and temperature meter. The Bluelab pH Probe and the Bluelab Conductivity/Temperature Probe are simply placed into the solution and the selected reading is displayed on screen. As the Bluelab Combo Meter is portable and does not require a power supply to operate, it can be used anytime and anywhere to help you manage your crops daily nutrient requirements. Calibration of the pH is simple with the push buttons on the meter and fresh calibration solutions. Conductivity and temperature do not need to be calibrated as this is locked in during manufacture. Features Measures pH, conductivity/nutrient (EC, CF, ppm 500 and ppm 700) and temperature (°C, °F) Lightweight and portable Large easy to read display Simple push button pH calibration Successful pH calibration indicator No calibration required for conductivity and temperature Replaceable double junction pH probe Over range and under range indicators Low battery indicator 2 x AAA alkaline batteries included Auto off function BLUELAB COMBO METER DEMO See first-hand why the Bluelab Combo Meter has everything needed and nothing that isn’t. BLUELAB COMBO METER CLEANING & CALIBRATION Watch how to clean, then calibrate / test the probes for the Bluelab Combo Meter DO Clean the Bluelab Nutrient/Temperature Probe at least monthly, or even more often if using additives or nutrient solutions that contain oils, as these contaminate the probes and can give an inaccurate reading. Clean and calibrate the Bluelab pH Probe when: The reading is different to what was expected. The batteries have been removed or changed. The pH probe is replaced with a new one or is disconnected from the Combo Meter. The pH calibration indicators have disappeared. Calibrate the pH every time the Bluelab pH Probe is cleaned, which should be monthly, and use only fresh calibration solutions each time. Large bottles of calibration solution should be de-cantered into small plastic containers. This stops contamination of the solution. Be gentle with the Bluelab pH Probe as they are glass and easily broken. Use Growth Technology calibration solutions to calibrate the pH where possible. These solutions have been specially created to work with the Bluelab product range. Not all calibration solutions are created equal! Place the Bluelab pH Probe storage cap filled with fresh water or Growth Technology pH Probe Storage Solution back over the tip of the Bluelab pH Probe when not in use. This stops the Bluelab pH Probe from drying out. If it dries it dies! Always place the shroud onto the Bluelab Nutrient/Temperature Probe after cleaning to protect the probe face and ensure accurate readings. Be patient with pH. While calibrating or taking readings, wait until the reading has stabilized to a constant value. Wait 5 – 10 minutes for the reading to stabilize if the probe temperatures are very different to the solution temperature and stir the probes in solution or place probes where there is good movement. Remove batteries and disconnect the Bluelab pH Probe if the Bluelab pH Meter is to be stored for long periods of time. Use alkaline batteries where possible. Store in a clean dry place out of direct sunlight DON’T Don’t be rough with Bluelab pH Probe or bang it on the side of your tank – it will break! Don’t touch the pH or nutrient/temperature probe heads with fingers. This will contaminate the probe surface. The only time the Bluelab Nutrient/Temperature Probe can be touched is when cleaning the probe with the liquid scourer Don’t use de-ionized or distilled water in the storage cap for the Bluelab pH Probe. Don’t rinse the Bluelab pH Probe in de-ionized or distilled water Don’t use rechargeable batteries. Don’t submerse or drop the Bluelab Combo Meter into any liquid as it is not waterproof. If you do drop it in water, immediately remove the batteries and put in a warm dry place for 24 hours. Don’t throw away the instruction manual. Keep it in a safe place to be referred refer back to it if needed. The cleaning and calibration instructions are in the manual and should always be referred to until the grower is confident that the procedure is being carried out correctly. Don’t open the Bluelab Combo Meter – there are no user adjustments inside. This will void the guarantee. It will show if it has been opened! What if my nutrient Reading is low? Contaminated conductivity/temperature probe – Clean conductivity/temperature probe (see advice tab) Solution temperature low/high – Wait 5 to 10 minutes for reading to stabilize to constant value. My temperature reading is inaccurate This is down to the temperature of the conductivity/temperature probe being different to the solution temperature. Wait 5 to 10 minutes for conductivity/temperature probe to reach solution temperature. My ph reading is inaccurate pH probe is Contaminated – Clean pH Probe (see advice tab) Incorrect Calibration – Ensure calibration solutions are accurate. Replace if in doubt. Wait longer for readings to stabilize before calibrating to a constant value Calibration unreliable – Calibrate pH probe pH probe damaged or old – Replace pH probe The pH reading does not change from solution to solution. This is likely due to a broken glass bulb, tube or connector. Check pH probe for damage and replace pH probe if necessary. Display is showing a ‘battery low’ symbol. There is insufficient power to take a reading. Replace the batteries at once. DO NOT use rechargeable batteries. Why is my display showing nothing? It is likely that the batteries are dead or inserted incorrectly. Check batteries are correctly inserted and replace if necessary. Why is my display showing “Err” message? This indicates a problem with the pH calibration. Please read “Section 10” in the BlueLab Combo Meter Manual (error message descriptions). Why is my display showing “Ur” message? While in pH Mode – It is over or under the pH range, therefore the solution is > 14.0pH or solution is < 0.0pH. Check the pH probe connection, if this is connected correctly and problem still arises then the pH probe could be faulty. Whilst in temperature mode this “Ur” message indicates it is over or under the temperature range. The solution is > 51°C / 122 °F or the solution is <0 °C / 32 °F. While in Conductivity/Nutrient Mode – It is over the range of conductivity/nutrient. This indicates that the solution is > 9.9 EC, 99 CF, 4950 ppm 500, 6930 ppm 700. Note: the conductivity/temperature meter probe or combo meter could be faulty.