Yokogawa FU24F - Manual (Page 7)

IM 12B6J8-01E-E
7
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 TM 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
90
< 15 sec. (for 7 to 4 pH step at 25 ºC)
Response time temperature
- Dome shape : t
90
< 1 min. (for 10 °C step)
- Flat surface : t
90
< 4 min. (for 10 °C step)
Stabilization time pH : < 2 min. (for 0.02 pH unit during 10 sec.)