Technical data

Inputs

Analog input 1 (conductivity)

Electrolytic conductivity cells, with cell constants: 0.01; 0.1; 1.0; 3.0; 10.0 1/cm (2-electrode principle). The cell constant can be adjusted within the range 20 — 500%, so that unusual cell constants (e.g. 0.2; 0.5; etc.) can also be set.

Lead compensation, analog input 1
The effect of long cables for the measuring ranges above 20 mS/cm can be
compensated by entering the lead resistance, within the range 0.00 to 99.99Ω.

Zero-point calibration, analog input 1

Zero-point errors caused by the system can be compensated.

Conductivity ranges

0 — 1 µS to 0 — 200 mS, depending on the cell constant.
A table with all the measurement ranges is provided at the end of the Technical data.

Analog input 2 (temperature)

• Resistance thermometer
Pt100 or Pt1000-10 to +250°C
• NTC 2kΩ; 25°C, B=3500 -10 to +150°C
• NTC UUA 32J49; 2.25kΩ -10 to +150°C
• KTY 11-6; 2000 Ω -10 to +150°C
• Customer-specific characteristic,
maximum resistance 4500Ω

All temperature probes can be connected in 2-, 3- or 4-wire circuit. The setup program can be used to enter a customer-specific characteristic for the temperature probe. This means that any temperature probe (NTC or similar) that may already be present can still be used. The measurement display is in °C / °F, switchable.

Lead compensation, analog input 2

The offset can be used to correct the measured value in the range -20 to +20°C. Reference temperature (for temperature compensation) settable from 10 to 40°C (factory setting: 25°C, according to the international standard)

Temperature range

-10 to +250°C or +14 to +482°F

Deviation from characteristic, temperature

with Pt100 / Pt1000: ≤ 0.6 %
NTC 2 kΩ: ≤ 1.5 %
NTC UUA: ≤ 2.0 %
KTY11-6: ≤ 0.8 %
with customer-specific characteristic: ≤ 5 Ω.

Outputs

Two analog outputs

freely configurable:
0(2) — 10 V Rload ≥ 2 kΩ or
10 — (2)0 V Rload ≥ 2 kΩ or
0(4) — 20 mA Rload ≤ 400 Ω or
20 — (4)0 mA Rload ≤ 400 Ω
electrically isolated from the inputs:
ΔU ≤ 30V AC or
ΔU ≤ 50V DC
minimum scaling span: 10% of range span.

Deviation of the output signal

±0,015 mA or ±5 mV ±50 ppm/K

Relay output

changeover contact contact rating: 8 A, 250 V AC or 8 A, 24 V DC with resistive load contact life: > 100, 000 operations at rated load

Open collector

contact rating: 100 mA, 35 V DC with resistive load, voltage drop in the switched state ≤ 1.2 V, not short-circuit-proof

General characteristics

A/D converter

resolution 14 bit

Sampling time

500 msec = 2 measurements per second

Ambient temperature error

≤ 0.5 % per 10 °C

Measuring circuit monitoring

input 1 (conductivity): out-of-range
input 2 (temperature): out-of-range, probe short-circuit, probe break.
In fault condition, the outputs adopt a defined (configurable) state.

Data backup

EEPROM

Supply voltage

20 to 30 V DC, ripple < 5 % power consumption ≤ 3 W, with reverse-polarity protection. For operation with SELV or PELV circuits.

Electrical connection

screw terminals up to 2.5 mm2

Permissible ambient temperature

operating temperature range 0 to +50 °C
functional temperature range -10 to +60 °C

Permissible storage temperature

-20 to +75 °C

Climatic conditions

rel. humidity ≤ 93 %, no condensation

Protection (to EN 60 529)

IP20

Electrical safety

to EN 61010 clearance and creepage distances for
– overvoltage category II
– pollution degree 2

Electromagnetic compatibility

to EN 61326
interference immunity: to industrial requirements
interference emission: Class B

Housing

housing for DIN rail mounting: PC (polycarbonate)

Mounting

on a 35 x 7.5 mm DIN rail to DIN EN 60715

Operating position

unrestricted

Weight

approx. 150 g