Metrohm 917 - Measuring Inputs; Generator Electrode; Indicator Electrode; Temperature Sensor

32.2 Measuring inputs
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316
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917 Coulometer
32.2 Measuring inputs
32.2.1 Generator electrode
One electrode connector (Gen.) for a generator electrode.
Iodine generation with current pulses or continuous current.
Current at the
electrode
auto: variable direct current
100, 200, 400 mA: pulsating direct current
I
max
400 mA
Titration rate max. 2.24 mg H
2
O/min
32.2.2 Indicator electrode
One measuring input (Ind.) for an indicator electrode.
Measuring mode
Ipol
Determination with adjustable polarization current.
Voltametric endpoint indication with alternating current.
AC 5, 10, 20, 30 µA
DC –125 - +125 µA
32.2.3 Temperature sensor
One measuring input (Temp.) for a Pt1000 or NTC temperature sensor.
Measuring range
Pt1000 –150 - +250 °C
NTC –5 - +250 °C
For an NTC sensor with (R (25 °C) = 30000 Ω and B (25/50) = 4100 K)
Resolution
Pt1000 0.1 °C
NTC 0.1 °C
Measuring accu-
racy
Pt1000 ±0.2 °C
(Applies for measuring range –20 - +150 °C; ±1 digit; without sensor
error, under reference conditions)
NTC ±0.6 °C
(Applies for measuring range +10 - +40 °C; ±1 digit; without sensor
error, under reference conditions)