Metrohm 835 Titrando - Manual (Page 42)

4.1 Technical data
36
Titrando Installation Instructions
Polarizer (857 only)
1 measuring input for polarized electrodes
Polarization current Ipol 1)
Polarization potential Upol 2)
–122.5 ... +122.5 µA in 2.5 µA steps
–1225 ... +1225 mV in 25 mV steps
1) –125.0 / +125.0 µA: values not guaranteed, dependent on reference potential
+2.5 V
2) –1250 / +1250 mV: values not guaranteed, dependent on reference potential
+2.5 V
4.1.3 Specification of the measuring inputs
Measuring range Resolution Measuring accuracy 1)
pH –20.000 ... +20.000 0.001 pH ± pH 0.003
Potential 2) –2000 mV ... +2000 mV 0.1 mV ± 0.2 mV
Current 3) –200 µA ... +200 µA 0.01 µA −
Temperature
Pt1000
NTC
–150 °C ... +250 °C
–20 °C ... +250 °C 4)
0.1 °C
0.1 °C
± 0.2 °C (Pt1000: –20 °C ...
+150 °C)
1) ± 1 digit, without sensor error, under reference conditions
2) potentiometric and voltametric
3) amperometric
4) for a NTC-Sensor with R (25 °C) = 30'000 Ohm and B (25/50) = 4100 K.
Measuring cycle: 100 ms for all measuring ranges
4.1.4 Specification of the measuring inputs (857 only)
Measuring range Resolution Measuring accuracy 1)
pH –13.000 ... +20.000 0.001 pH ± pH 0.003
Potential 2) –1200 mV ... +1200 mV 0.1 mV ± 0.2 mV
Current 3) –120 µA ... +120 µA 0.01 µA −
Temperature
Pt1000
NTC
–150 °C ... +250 °C
–5 °C ... +250 °C 4)
0.1 °C
0.1 °C
± 0.2 °C (–20 °C... +150 °C)
± 0.6 °C (+10 °C... +40 °C)
1) ± 1 digit, without sensor error, under reference conditions
2) potentiometric and voltametric
3) amperometric
4) for a NTC-Sensor with R (25 °C) = 30'000 Ohm and B (25/50) = 4100 K.
Measuring cycle: 100 ms for all measuring ranges