bluelab Guardian Monitor User Manual

Bluelab Guardian Monitor
Bluelab Corporation Limited 9 Version1:180809_bl
To calibrate the pH probe follow these steps;
1. In three separate containers prepare a small
amount of fresh water, pH 7.0 solution and
either pH 4.0 or pH 10.0 solution.
2. Rinse the pH probe in fresh water and place
the probe tip into the pH 7.0 buffer solution
and wait for the reading in the pH window to
stabilise. Press and hold the pH cal button for
a few seconds until PH CAL appears in the
windows, then release the pH cal button. The
‘7’ LED will glow green. All three windows will
return to monitoring mode with all current
values being displayed. If ERR is displayed see
the troubleshooting guide on page 15.
3. Rinse the pH Probe in fresh water by gently
stirring.
Place the probe tip into the pH 4.0 or pH 10.0
solution and wait for the reading in the pH
window to stabilise. Press and hold the pH cal
button for a few seconds until PH CAL appears
in the windows, then release the pH cal
button. The 4/10 LED will glow green. All
three windows will return to monitoring mode
with all current values being displayed. If ERR
is displayed see the troubleshooting guide on
page 15.
pH Calibration LEDs
The LEDs next to the pH window will let you know
the status of calibration. See the table at right.
NOTE: The pH probe and hence calibration will
eventually fail due to;
 Contamination and age of pH Probe
 pH Probe used to measure solutions at
temperatures above 50 C (122 °F) or below
0 C (32 °F)
 pH probe exposed to aggressive chemicals
 Internal damage to the pH probe from rough
treatment
 Damage to the cable of the pH probe from
rough treatment
 Probe repeatedly drying out
 Moisture getting inside the BNC connector on
the pH probe cable
Using factory default calibration
values. Both LEDs off
pH 7 calibrated OK. Using factory
default for pH 4/10
pH 7 & pH 4 or pH 10 calibrated
OK.
30 days passed since last full
calibration - calibration due.
o 7
o 4/10
7
o 4/10
7
4/10
7
4/10
7
o 4/10
If 7 is flashing and 4/10 is off,
calibration is also required as
4/10 was never calibrated

bluelab Guardian Monitor Specifications

General

Brand	bluelab
Model	Guardian Monitor
Category	Measuring Instruments
Language	English