Knick Stratos Multi E401N - pH

Stratos Multi E401N
159
12.8 Measuring Functions
12.8.1 pH
Digital input
For Memosens sensors (pH, ORP, pH/ORP)
Terminals 1…5 or MK-MS095N module
Display ranges Temperature: -20.0…200.0°C / -4…392°F
pH value: -2.00…16.00
ORP: -1999 ... 1999mV
rH value (with pH/ORP sensor): 0…42.5
Measurement error Depending on sensor
Module input, analog
For analog pH and ORP sensors
Measuring ranges Temperature: -20.0…200.0°C / -4…392°F
pH value: -2.00…16.00
ORP: -1999 ... 1999mV
rH value (with pH/ORP sensor): 0…42.5
Glass electrode input
Reference temperature 25°C/77°F
Input resistance > 1x10
12
Ω
Input current < 1 x 10
-12
A
Impedance range: 0.5...1000MΩ (±20%)
Reference electrode input
Reference temperature 25°C/77°F
Input resistance > 1x10
10
Ω
Input current < 1 x 10
-10
A
Impedance range: 0.5...200kΩ (±20%)
Measurement error
1) 2)
pH value < 0.02, TC: 0.002pH/K
mV value < 1mV, TC: 0.1mV/K
Temperature input via module
Pt100/Pt1000/NTC30kΩ/NTC 8.55kΩ/Balco 3kΩ
2-wire connection, adjustable
Measuring ranges Pt100/Pt1000: -20.0 ... 200.0°C/-4 ... 392°F
NTC30kΩ: -20.0 ... 150.0°C/-4 ... 302°F
NTC8.55kΩ (Mitsubishi): -10.0...130.0°C/14...266°F
Balco 3kΩ: -20.0...130.0°C/-4...266°F
Adjustment range 10K
Resolution 0.1°C/0.1°F
Measurement error
1) 2)
< 0.5K (< 1K for Pt100; <1K for NTC >100°C/212°F)
Temperature compensation
Off,
Linear characteristic 00.00...19.99%/K,
Ultrapure water,
Table: 0 … 95°C, user-defined in 5-K steps
Reference temperature 25°C/77°F
1)
At rated operating conditions
2)
± 1 count, plus sensor error