A-3
Thermo Scientific Orion 2120XP Calcium Hardness Analyzer User Guide
Appendix
Calcium Hardness Measurement
Range
25 ppb to 500 ppm
Accuracy (with DKA calibration)
± 10% or 10 ppb as CaCO
3
, whichever is greater
Resolution
2, 3 or 4 significant digits
Response Time
50% of final reading within 2 minutes of injecting a
standard solution
Units Displayed
ppb, ppm (auto ranging)
Temperature Compensation
Automatic
mV Measurement
Range
± 1999.9 mV
Resolution
0.1 mV
Relative Accuracy
± (0.5 mV + 0.1%)
Temperature Measurement
Range
-10 to 120 °C
Resolution
0.1 °C
Relative Accuracy
± 0.5 °C
Failure Detection
Manual compensation
ATC Probe
30 K thermistor
LED Status Indicator
Green
OK
Yellow
Warning
Red
Failure
Specifications