Metrohm 915 KF Ti-Touch - Manual (Page 370)

32.2 Measuring inputs
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915 KF Ti-Touch
32.2 Measuring inputs
The measuring cycle is 100 ms for all measuring modes.
32.2.1 Polarizer
A measuring input (Pol.) for polarizable electrodes.
Measuring mode
Ipol Determination with adjustable polarization current.
Polarization
current –120 - +120 µA (increment: 1 µA)
–125 - –121 µA / +121 - +125 µA: non-guaranteed values, dependent
on reference voltage +2.5 V
Measuring
range –1,200 - +1,200 mV
Resolution 0.1 mV
Measuring
accuracy ±0.2 mV
(±1 digit, without sensor error, under reference conditions)
Measuring mode
Upol Determination with adjustable polarization voltage.
Polarization
voltage –1,200 - +1,200 mV (increment: 10 mV)
–1,250 - –1,210 mV / +1,210 - +1,250 mV: non-guaranteed values,
dependent on reference voltage +2.5 V
Measuring
range –120 - +120 µA
Resolution 0.01 µA
Measuring
accuracy –
32.2.2 Temperature
A measuring input (Temp.) for temperature sensors of the Pt1000 or NTC
type with automatic temperature compensation.
R (25 °C) and B value can be configured for NTC sensors.
Measuring range
Pt1000 –150 - +250 °C
NTC –5 - +250 °C
(For an NTC sensor with R (25 °C) = 30,000
Ω and B (25/50) = 4,100 K)
Resolution
Pt1000 0.1 °C
NTC 0.1 °C