Yokogawa FU24F User Manual download pdf (Page 7)

IM 12B6J8-01E-E

2. GENERAL SPECIFICATIONS

2.1 Measuring elements

pH glass electrode

Ag/AgCl reference

Solid Platinum electrode

Pt1000 temperature sensor

2.2 Wetted parts

Sensor body : PPS 40GF (Ryton

with glass filling)

Measuring sensor : G-glass

LE glass tube : AR-glass

Reference junction : Porous PTFE

Earth pin : Solid Platinum

O-ring : Viton

Bellow system : Viton

2.3 Functional specifications (at 25°C)

Measuring system

Isothermal point : pH 7

Reference system : Ag/AgCl with saturated KCl

Glass impedance

- Dome shape : 200 MΩ nominal

- Flat surface : 700 MΩ nominal

Liquid junction : Non-flow double junction

Junction resistance : 1 to 15 kΩ

Temperature element : Pt1000 to IEC 751

Asymmetry potential(zero) : 8 ± 15 mV

Slope : > 96 % (of theoretical value)

Note: The FU24F temperature sensor is designed for cell compensation and for indication.

It is NOT designed for process temperature control.

2.4 Dynamic specifications

Startup time sensor : < 60 sec.

Response time pH : t

< 15 sec. (for 7 to 4 pH step at 25 ºC)

Response time temperature

- Dome shape : t

< 1 min. (for 10 °C step)

- Flat surface : t

< 4 min. (for 10 °C step)

Stabilization time pH : < 2 min. (for 0.02 pH unit during 10 sec.)

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Yokogawa FU24F User Manual Page 7