Product overview and how to get started
Overview
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
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Bluelab Guardian Monitor |
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‘Plant Safe’ green LED display |
Visual alarm for both high and low settings |
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Large easy to read displays |
Greater tolerance to RF/electronic interference provided |
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No calibration required for conductivity or temperature |
Water resistant design |
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Selectable units for conductivity and temperature |
International power supply |
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Simple push button pH calibration |
Adjustable display brightness |
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Replaceable double junction pH probe |
Settings retained when power lost (non-volatile memory) |
Register your product with Bluelab
Product Manuals:
MONGUA User Manual - German Deutsch
Get started:
To mount:
1. Mount unit on wall or hang on support ensuring probes can reach tank/reservoir.
2. Connect appropriate plug adaptor to power supply.
3. Connect power supply and Bluelab pH probe into base of Guardian Monitor.
4. Switch on mains power.
To set up:
Changing conductivity and temperature units
1. Press and hold conductivity 'units' button. 
After 3 seconds it will change to the next unit indicated by the glowing LED.
Release button. Repeat step until desired unit is selected.
2. Press and hold Temperature 'units' button. 
After 3 seconds it will change to the next unit indicated by the glowing LED.
Release button. Repeat step until desired unit is selected.
Select display brightness 
1. Press and hold the 'display brightness' button while pressing up or down buttons to change brightness.
Calibrate pH Probe for the Bluelab Guardian Monitor:
pH Probe calibration must be done before use. EC probe does not require calibration but both probes need to be in the solution for pH to compensate for temperature.
1. Remove storage cap from the pH probe with a gentle twist.
2. Rinse the tip of both probes in fresh water, shake off excess water.
3. Place both pH and EC probe in Bluelab pH 7.0 Calibration Solution.
4. Press and hold 'pH cal' button until "PH' and 'CAL' appear. Release button. The pH 7 LED and first indicator will flash, increasing to four, as the unit calibrates. The pH 7 LED will illuminate when complete.
5. Rinse both probes in fresh water, shake off excess water.
6. Place the tip of both probes in Bluelab pH 4.0 Calibration Solution or pH 10.0 calibration solution.
7. Press and hold 'pH cal' button until 'PH CAL' appears. Release button. The pH 4/10 LED and first indicator will flash, increasing to four as the unit calibrates. When finished, the pH 4/10 LED will illuminate. Calibration is complete.
8. If not placing pH probe into tank/reservoir immediately, place storage cap back on. The pH probe tip must not be allowed to dry out. Hydrate with Bluelab KCl Storage Solution if needed.
After 30 days the LEDs will flash indicating calibration of the pH probe is required.
Placement of probes:
1. 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!
2. Place pH probe into tank/reservoir and push suction cup onto side, so the tip stays submerged in the solution and doesn't get knocked around.
3. Place conductivity/temperature probe into the tank/reservoir.
Both probes can be fully submerged.
To set alarms (optional):
Quick-set for high and low alarm values
1. Adjust tank/reservoir to exact conductivity, temperature and pH level required.
2. Press and hold 'alarm' button until 'AL H' is displayed in all 3 windows.
3. Press the 'display brightness' button once.
4. All 3 windows will display 'Auto' then 'SAVE' will display in Conductivity window.
5. The Alarm LED will glow.
To set the detailed ‘alarm HIGH’ and ‘alarm LOW’ values refer to the Bluelab Guardian Monitor Manual.
Actual values:
Probe maintenance:
Your Bluelab pH and EC probes need to be cleaned and calibrated regularly to extend life and get accurate measurements. Refer to the following articles:
- Bluelab pH Probes: Care, maintenance and storage - Clean, hydrate and calibrate your pH probe monthly.
- How to clean Bluelab conductivity (EC/PPM) probes - Clean and calibrate your conductivity probe monthly.
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