Troubleshooting Guide; Contact Details - bluelab Guardian Monitor Care And Use Manual

14.0 Troubleshooting guide

Trouble Reason
Contaminated conductivity/temperature probe.
Nutrient reading low
Temperature of conductivity/temperature probe and solution different.
Temperature reading inaccurate Temperature of conductivity/temperature probe different to solution temperature. Wait 5-10 minutes for conductivity/temperature probe to reach solution temperature.
Contaminated pH probe.
Using factory default calibration.
pH reading inaccurate Calibration old.
Broken glass bulb, tube or connector.
pH probe damaged or old.
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.
Old or contaminated solutions used for calibration.
Display shows 'Err' during
Dirty or contaminated pH probe.
calibration
pH probe tip been allowed to dry.
pH probe damaged or old.
Mains not switched on.
No display
Power adaptor not plugged into the Guardian Monitor.
pH displays 'or' Over range pH.
pH displays 'ur' Under range pH.
temp displays 'or' Over range temperature.
temp displays 'ur' Under range temperature.
conductivity displays 'or' Over range conductivity/nutrient.
EC and pH cannot be determined as temperature range is over/under.
A display shows _ _ _ _
Specifications
Range
Resolution
Accuracy (at 25 °C/77 °F)
Calibration Two point (pH 7.0 and pH 4.0 or pH 10.0)
Temperature compensation
probe is in same solution as pH probe)
Operating environment
Power source
Other features

Contact details

Bluelab Corporation Limited, 8 Whiore Avenue, Tauriko Industrial Park, Tauranga 3110,
New Zealand, Ph +64 7 578 0849 Fax +64 7 578 0847
www.getbluelab.com
pH
0.0 – 14.0 pH
0.1 pH
±0.1 pH
Yes (if conductivity/temperature
Input: 100-240 Vac, 50-60 Hz, 5 VA, output: 5VDC 1Amp, 4 interchangeable plug types (USA, Euro, UK, NZ/AUS)
Silent visual alarm (high and low settings), adjustable display brightness, water resistant, non-volatile memory, over and under range indicators
Email support@getbluelab.com
Correction
Clean conductivity/temperature probe (see section 13) .
Wait 5-10 minutes for conductivity/temperature probe to reach solution temperature.
Clean pH probe (see section 13). Replace pH probe if in doubt. Wait longer for reading to stabilize before calibrating.
Calibrate pH probe (see section 10).
Calibrate pH probe (see section 10).
Check pH probe for damage.
Replace pH probe.
Calibrate to pH 7.0 again then do pH 4.0 / pH 10.0 calibration within one hour.
Use fresh calibration solutions.
Clean pH probe (see section 13).
Hydrate pH probe (see section 2).
Replace pH probe.
Switch mains power on.
Plug power adaptor into the base of the Guardian Monitor labeled 'Power Input'.
Solution > 14.0 pH.
Solution < 0.0 pH.
Check pH probe connection. pH probe could be faulty. Guardian Monitor could be wet inside.
Solution >51 °C / 122 °F.
Solution <0 °C / 32 °F.
Conductivity/temperature probe or Guardian Monitor faulty.
Over range conductivity >9.9 EC, 99 CF, 1990 ppm.
Conductivity/temperature probe or Guardian Monitor faulty.
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.
Conductivity
0 – 5.0 EC, 0 – 50 CF,
0 – 2500 TDS (ECx500), 0 – 3500 ppm (ECx700)
0.1 EC, 1 CF
10 TDS, 10 ppm
±0.1 EC, ±1 CF
±50 TDS, ±70 ppm
Not required (factory calibrated)
Yes
0 - 50 °C / 32 - 122 °F
Limitation of liability
Under no circumstances shall Bluelab Corporation Limited be liable for any claims, losses, costs and
damages of any nature whatsoever (including any consequential loss) that result from the use of, or the
inability to use, these instructions.
Temperature
0 – 50 °C
32 - 122 °F
1 °C
1 °F
±1 °C
±2 °F
Not required (factory calibrated)
Not applicable
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