IM 12B06J01-40EN-P
2. GENERAL SPECIFICATIONS
2.1 Measuring elements
: pH glass electrode
: Silver/Silver chloride reference
: Solid platinum electrode
: Pt1000 temperature sensor
2.2 Wetted parts
Sensor body / shaft
: AR-Glass, PEEK
Earthing ring
: Titanium
Measuring sensor
: Glass (type G or L)
O-ring
: Viton (EPDM back-up)
Reference junction
: Porous PTFE
2.3 Functional specifications (at 25 °C)
Isothermal point
: pH 7 / 3.3M KCl
Reference system
: Ag/AgCl with saturated KCI
Glass impedance
- G-Glass
: 200 M
Ω nominal
- L-Glass
: 775 M
Ω nominal
Junction resistance
: < 5
kΩ
Liquid outlet
: non-flow single junction
Temperature element
: Pt1000 to IEC 751
Asymmetry potential
: 8 ± 15 mV
Slope
: > 96 % (of theoretical value)
Sensor length
: 120 mm and 225 mm
Note:
The temperature sensor included in the SC25V 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
< 90 sec. (for 10 °C step)
Stabilization time pH
: < 2 min. (for 0.02 pH deviation during 10 sec.)
2.5 Operating range
pH
: 0 to 14
Temperature
- G-Glass
: -10 to +80 ºC (14 to 176 ºF)
- L-Glass
: +15 to +130 ºC (59 to 266 ºF)
Pressure
: 0 to 10 bar (0 to 145 psi)*
Conductivity
: > 1
0 μS/cm
* Damaging the screw thread might influence the max process pressure.
Note:
The pH operating range at room temperature is 0-14 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)