Endress+Hauser Liquiline M CM42 - Calibration Best Practices; Calibration Intervals and Monitoring

8
Input
pH / ORP (analog sensors) Measured variable
• pH value
• Oxidation-reduction potential (ORP)
•Temperature
Measuring range
Cable specification
Applicable temperature sensors
• Pt100
• Pt1000
•NTC 30K
Ex specification
Conductivity (analog sensors) Measured variable
• Conductivity
• Resistivity (conductive measurement only)
• Concentration
Measuring range
pH value –2 to 16
ORP –1500 to +1500 mV
Temperature –25 to + 150 °C (–10 to 300 °F)
Without SCS 50 m (160 ft) max. cable length
With SCS 20 m (65 ft) max. cable length
Intrinsically safe sensor circuit with type of protection: EEx ia IIC
Max. output voltage U
o
Max. output current I
o
Max. output P
o
Max. external inductance L
o
Max. external capacity C
o
Glass electrode
10.08 V
4.1 mA
10.2 mW
200 μH
150 nF
ISFET
10.08 V
50.7 mA
128 mW
200 μH
150 nF
Conductivity, conductive measured
Two-electrode sensor
Four-electrode sensor
0.1 μS
.
k
1))
to 20 mS
.
k
0.1 μS
.
k to 1.5 S
.
k
1) k = cell constant in cm
-1
Example: 2-electrode sensor, k=0.01 cm
–1
, resulting measuring range: 0.001 to 200 μS/cm
Conductivity, inductive measured 1.7 μS
.
k
2))
to 1 S
.
k
2) k=cell constant in cm
–1
Example: sensor, k=2 cm
–1
, resulting measuring range: 3.4 μS/cm to 2 S/cm
Resistivity, conductive measured 10 MΩ/k to 50 Ω/k
Concentration NaOH: 0 to 15% (0 to 100 °C / 32 to 212 °F)
HNO
3
: 0 to 25% (0 to 80 °C / 32 to 180 °F)
H
2
SO
4
: 0 to 30% (0 to 100 °C / 32 to 212°F)
H
3
PO
4
: 0 to 15% (0 to 80 °C / 32 to 180 °F)
HCl: 0 to 20% (0 to 65 °C / 32 to 150 °F)
4 user tables