Metrohm 820 IC Separation Center - Manual (Page 95)

6.1 Technical data
819 IC Detector / 820 IC Separation Center
87
6 Appendix
6.1 Technical data
Provided that nothing to the contrary is mentioned, the
published data are typical values at an ambient tem-
perature of 25°C.
6.1.1 819 IC Detector
Conductivity measurement
Measurement ranges 100, 200, 500, 1000, 2000, 5000, 10'000 µ S/cm
Full Scale 0.05 … 10'000 µ S/cm
Temperature correction Automatic correction of the measured conductiv-
ity to reference temperature 20°C with the adjust-
able temperature coefficients
(1.5 %/°C or 2.5 %/°C)
Accuracy, absolute value < 4 % of full-scale value for all ranges under the
following reference conditions:
Adjustment with reference resistance to 1.000 V
(range 1 mS/cm, cell constant 16.7 /cm, temp.
coeff. 2.5 %/°C, frequency 5 kHz, room tempera-
ture) to accuracy < ± 2 mV, measurement accu-
racy < 0.5 % after 30 min warm-up time
Linearity Up to ± 150 % of each full-scale range
Deviations < 0.5 % of full-scale range
Temperature dependence Typically 25 ppm/°C
Dependence of cell const.. < ± 1 % over entire adjustment range
Drift (electronic) < 0.0013 % of selected measurement range
/h/°C
Noise (electronic) Typically < 0.0003 % of selected meas. range
Damping 2-stage damping (Bessel 4 th order)
" Damping off " 0.25 s (10 … 90 %)
" Damping on " 2.00 s (10 … 90 %)
Autozero
Function Automatic zero setting (electronic background
compensation) over entire selectable measure-
ment range
Maximum error ± 0.6 % of full-scale range
Linear range ± 150 % of full-scale range