Metrohm 867 pH Module Manual de usuario descargar pdf (Pagina 43)

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7 Technical specifications

867 pH Module

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7.1.2 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

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)

7.1.3 Polarizer

One measuring input (Pol.) for polarizable electrodes.

Measuring mode

Ipol

Determination with adjustable polarization current

Polarization

current

–122.5 - +122.5 µA (increment: 0.5 µA)

–125.0 - +125.0 µA: non-guaranteed values, dependent on reference

voltage +2.5 mV

Measuring

range

–1,200 - +1,200 mV

Resolution 0.1 mV

Measuring

accuracy

±0.2 µA

(±1 digit; without sensor error, under reference conditions)

Measuring mode

Upol

Determination with adjustable polarization voltage

Polarization

voltage

–1,225 - +1,225 mV (increment: 25 mV)

–1,250 - +1,250 mV: non-guaranteed values, dependent on reference

voltage +2.5 mV

Measuring

range

–120 - +120 µA

1 2 ... 38 39 40 41 42 43 44 45 46 47 48 ... 62 63

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Metrohm 867 pH Module Manual de usuario Pagina 43

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