FAQ and troubleshooting for the Bluelab Guardian Monitor

Find answers and solutions to common questions for the Bluelab Guardian Monitor Wi-Fi

Please note: This guide can also be used for the Bluelab Guardian Monitor standard (MONGUA and MONGUACON) and Bluelab Guardian Monitor Inline (MONGUACONIN).

Frequently asked questions

I'm a new customer to Edenic. How do I get set up?

Please read the Getting Started guide here.

Can I connect a device to a new Wi-Fi network?

Yes. A Bluelab Wi-Fi device can be reprovisioned onto a new Wi-Fi Network by entering “Provisioning Mode” on the device and using the Edenic phone app to configure the device.

Why does the Bluelab Guardian reading start at 5 EC then drop down to the correct reading when you initially power it up?

The reading settles after about 30 seconds so wait for a short while for EC to stabilise.

Is the Bluelab pH Probe fully submersible?

Yes, both the Bluelab Conductivity/Temperature Probe and the Bluelab pH Probe are fully submersible.

Is the Bluelab pH Probe replaceable?

Yes, the Bluelab pH Probe can be easily replaced by removing the old probe. Order new probes on the website or from a trusted Bluelab retailer.

There is a salt crust on my Bluelab pH Probe – why?

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.

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?

It is recommended to clean and calibrate your probes every 30 days.

Please refer to the following articles for how to clean the Bluelab Conductivity Probe:

Follow the steps in the articles below on how to clean and calibrate the Bluelab pH Probe:

Does the Bluelab Guardian Wi-Fi sync data if it is not connected?

Regarding data tracking during Wi-Fi disconnection, the Bluelab Guardian Monitor Wi-Fi is designed to continue recording measurements for 24 hours even when it temporarily loses its internet connection. The device will store data locally and automatically sync the recorded values once it reconnects to Wi-Fi.

However, please note that if the device is completely powered off or data is manually disabled, it will not retain measurements to sync later. For the most reliable monitoring, we recommend keeping the device powered on and connected to Wi-Fi when possible.

Troubleshooting Guide

Trouble	Reason	Correction
Nutrient reading low	Contaminated conductivity/ temperature probe.	Clean conductivity/ temperature probe.
Nutrient reading low	Temperature of conductivity/ temperature probe and solution different.	Wait 5-10 minutes for conductivity/ temperature probe to reach solution temperature.
Temperature reading inaccurate	Temperature of conductivity/ temperature probe different to solution temperature.	Wait 5-10 minutes for conductivity/ temperature probe to reach solution temperature.
pH reading inaccurate	Contaminated pH probe / glassware not clean.	Clean pH probe; then calibrate.
	Using factory default calibration.	Calibrate pH probe.
	Calibration old.	Calibrate pH probe.
	Broken glass bulb, tube or connector.	Check pH probe for damage.
	pH probe damaged or old.	Replace pH probe.
Display shows ‘Err’ during calibration	An attempt was made to calibrate with pH 4.0 or pH 10.0 calibration solution more than one hour after calibration with the pH7.0 solution.	Calibrate to pH 7.0 again then do pH 4.0 / pH 10.0 calibration within one hour.
	Old or contaminated solutions used for calibration.	Use fresh calibration solutions.
	Dirty or contaminated pH probe.	Clean pH probe.
	pH probe tip been allowed to dry.	Hydrate pH probe.
	pH probe damaged or old.	Replace pH probe.
No display	Mains not switched on.	Switch mains power on.
No display	Power adaptor not plugged into the Guardian Monitor.	Plug power adaptor into the base of the Guardian Monitor labeled ‘Power Input’.
pH displays ‘or’ pH displays ‘ur’	Over range pH. Under range pH.	Solution > 14.0 pH. Solution < 0.0 pH. Check pH probe connection. pH probe could be faulty. Guardian Monitor could be wet inside.
Temp displays ‘or’ Temp displays ‘ur’	Over range temperature. Under range temperature.	Solution >51 °C / 122 °F. Solution <0 °C / 32 °F. Conductivity/temperature probe or Guardian Monitor faulty.
Conductivity displays ‘or’	Over range conductivity/ nutrient.	Over range conductivity >9.9 EC, 99 CF, 1990 ppm. Conductivity/temperature probe or Guardian Monitor faulty.
A display shows _ _ _ _	EC and pH cannot be determined as temperature range is over/under.	Test pH probe in calibration solutions and conductivity/ temperature probe in a known conductivity standard solution to eliminate these as a cause of this problem. Check solution tank/reservoir for problems
Device doesn’t add to Edenic app	Device security code incorrect	Enter correct 4-digit security code on QR code found of rear of Product
Device doesn’t add to Edenic app	Device not in Provisioning mode, mobile Bluetooth off.	Ensure Device turned on, in Provisioning mode, mobile Bluetooth is turned on and within range of Device
Device doesn’t reconnect when I move it to its location	Device outside of Wi-Fi range	Either relocate Wi-Fi router within range or connect to Wi-Fi network at Device’s location

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