YOKOGAWA FU20-FTS, Инструкция по эксплуатации, Страница: 7 / 32

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IM 12B06J03-05EN-P
2. GENERAL SPECIFICATIONS
2.1 Measuring elements
: pH glass electrode
: Salt sensitive glass electrode
: Solid platinum electrode (LE/ORP)
: Pt1000 temperature sensor.
2.2 Wetted parts
Sensor body : PVDF-(GF20+TZ4)
Earthing pin : Solid Platinum
Measuring sensor : pH: L-glass
: Salt sensitive: Na-glass
LE glass tube : AR-glass
Sealing material : FTS : Viton
: MTS : FFKM, EPDM
Body insert : PVDF
2.3 Functional specifications (at 25 °C)
Isothermal point : pH 7, pNa 0 (pH 7 at 1 M NaCl)
Reference system : Salt sensitive, Ag/AgCl in 1 M NaCl
Glass impedance : 750 M
Ω nominal
Liquid outlet : non-flow no junction
Temperature element : Pt1000 to IEC 751
Asymmetry potential : 0 ± 15 mV
Slope : > 90 % in pH 2-12 with pH = pNa+2 (of theoretical value)
Note: The temperature sensor included in the FU20-FTS-MTS is designed for process
compensation and for indication. It is NOT designed for process temperature
control.
2.4 Dynamic specifications
Response time pH : t
90
< 15 sec. (for 7 to 4 pH step)
Response time temperature : t
90
< 120 sec. (for 10 °C step)
Stabilization time pH : < 2 min. (for 0.02 pH deviation during 10 sec.)
2.5 Operating range
pH : 2 to 14 (pH = pNa + 2)
ORP : -1500 to 1500 mV
Temperature : 0 to +105 ºC (32 to 221 ºF)
Pressure : 1.5 kPa
…500 KPa (0.015 - 5 Bar).
Over complete temperature range
Conductivity : > 1
0 μS/cm
Note: The pH operating range at room temperature is 2-14 pH, but at high temperatures
or range outside 2-12 pH the lifetime will be seriously shortened.
Note: The upper process temperature for the intrinsically safe version is limited by the
ambient temperature (T
amb
.) defined for each temperature class (T3, T4, T5 and T6)