Bluelab Combo Meter - Manual (Page 11)

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11
12.0 Technical specifi cations
pH Conductivity Temperature
Measurement
range
0.0 - 14.0 pH
0 - 9.9 EC
0 - 99 CF
0 - 4950 ppm 500
(TDS)
0 - 6930 ppm 700
0 - 50 °C
32 - 122 °F
Resolution 0.1 pH
0.1 EC
1 CF
10 ppm 500 (TDS)
10 ppm 700
1 °C
1 °F
Accuracy
(at 25 °C/
77 °F)
±0.1 pH
±0.1 EC
±1 CF
±50 ppm
±70 ppm
±1 °C
±2 °F
Calibration
Two point pH 7.0
and pH 4.0
or pH 10.0
Not required
(factory calibrated)
Not required
(factory calibrated)
Temperature
compensation
Not applicable
Automatic temperature
compensation
Not applicable
Operating
environment
0 - 50 °C / 32 - 122 °F
Power source 2 x AAA alkaline batteries
11.0 Error messages
An error message will only appear following pH calibration failure.
‘Err’ will be displayed for a few seconds then the display will show the previous
reading. Successful pH calibration indicators will disappear. The Bluelab Combo
Meter is in an uncalibrated state, therefore recalibration is required. See causes
of Error messages below.
Possible causes for an ‘Err’ message:
Calibration solutions contaminated
Wrong solutions used
pH probe contaminated
pH probe not properly attached
pH probe worn out or damaged
Calibrate to pH 7.0 FIRST then to pH 4.0/10.0