bluelab Guardian Monitor Care And Use Manual page 6

11.0 Placement of probes
Both the Bluelab pH Probe and Bluelab Conductivity/Temperature Probe require submersion in the liquid for
a measurement to occur.
very strong acid may damage the probes or your alarms (if set) may trigger.
Fit the (optional) pH probe holder to the stem of the pH probe using a
1
gentle twisting motion.
Place the pH probe into the reservoir and push the suction cup onto
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the side of the reservoir but far enough down so the pH probe tip is
in the solution. The holder prevents damage to the pH probe from
banging onto the side of the reservoir with movement of the solution.
Place the conductivity/temperature probe into the reservoir.
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12.0 Set alarms (optional)
The alarm function warns you when the solution deviates from
the desired levels you have chosen for each measurement.
When an alarm condition is present, the display of the affected
measurement will flash. If the measurement changes back to
within the limits you have chosen, the flashing will stop.
Even though the resolution of the Guardian is 10 ppm / TDS,
the alarms will set only in 50 ppm and 70 ppm increments.
There are two ways to set the alarm, 'quick-set' or 'detailed-set'.
Alarm 'quick-set'
This allows you to quickly set the 'alarm HIGH' and 'alarm LOW' values for all of the three measurements.
The table below shows the values that are pre-set when 'quick-set' is used.
NOTE: Before you use the quick-set function, the solution in the tank/reservior must be adjusted to the
desired/actual levels for all three parameters and the levels displayed in each of the windows. If this is not
done you should use the alarm 'detailed-set'.
Alarm low
actual value –
2 CF / 0.2 EC
Conductivity
100 TDS
140 ppm
actual value –
Temperature
3 °C / 5 °F
actual value –
pH
0.5 pH
To activate the 'quick-set' alarm;
Press and hold the alarm button until 'AL H' is displayed in all
1
three windows.
Release the alarm button.
Press the brightness button once.
2
All three windows will display Auto for 1 second and then SAVE
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will be displayed in the conductivity window. The alarms are now
auto set and the alarm mode will be turned on. The alarm LED
will glow.
12.0 Set alarms (optional) cont.
Turn alarm ON/OFF
Press the alarm button to change between alarm ON and alarm OFF. When the alarm is ON the alarm LED
will glow.
NOTE: If you press and hold the alarm button you will enter the alarm setting mode.
Alarm 'detailed-set'
To set the detailed 'alarm HIGH' and 'alarm LOW'
values;
1 Press and hold the alarm button until 'AL H' is
displayed in all three windows.
2 Release the button and the current 'alarm HIGH'
values are displayed in each window.
3 To set conductivity alarm high value, press the
conductivity unit button then the up and down
buttons to change its value.
4
To set temperature alarm high value, press the
temperature unit button then the up and down
buttons to change its value.
5 To set pH alarm high value, press the pH unit
button then the up and down buttons to change
its value.
6 Press the alarm button to now select the low alarm
values.
7 Set the low alarm values the same way as you did
the high alarms.
8 Press the alarm button. SAVE is briefly displayed in
the conductivity window and the Guardian Monitor
will return to its normal monitoring mode.
Alarm high
NOTES:
actual value +
To review current alarm settings without changing
2 CF / 0.2 EC
the values, repeatedly press the alarm button to step
100 TDS
through the high and low alarms.
140 ppm
If you want to exit the alarm settings mode without
actual value +
keeping any changes you have made DO NOT press
3 °C / 5 °F
any keys. The Guardian Monitor will 'timeout' and
return to its normal monitoring mode without saving
actual value +
any changes after 1 minute.
0.5 pH
The software will prevent you from setting low alarm
values higher than the high alarm values.
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