Metrohm 888 Titrando - Manual (Page 47)

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8 Technical specifications
888 Titrando
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8 Technical specifications
8.1 Measuring interface
The 888 Titrando has one galvanically isolated measuring interface.
The measuring cycle is 100 ms for all measuring modes.
8.1.1 Potentiometry
One high-ohm measuring input (Ind.) for pH, metal or ion-selective elec-
trodes and one measuring input (Ref.) for separate reference electrodes.
Input resistance > 1 · 10 12 Ω
Offset current < 1 · 10 –12 A (under reference conditions)
Measuring mode
pH
Measuring
range –13 - +20 pH
Resolution 0.001 pH
Measuring
accuracy ±0.003 pH
(±1 digit, without sensor error, under reference conditions)
Measuring mode
U
Measuring
range –1,200 - +1,200 mV
Resolution 0.1 mV
Measuring
accuracy ±0.2 mV
(±1 digit, without sensor error, under reference conditions)
8.1.2 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
(R (25 °C) = 30,000
Ω and B (25/50) = 4,100 K)
Resolution
Pt1000 0.1 °C