BAMO Mesures SAS designed the resistivity metre 319 ML / DB for process control and survey of demineralised water through two bottles of resins.

Input 1: controls the first bottle, as a blind instrument (without display)
As soon as the fluid resistivity is less than the preset value the relay 1 switches a signal alarm to inform the operator.

Input 2: controls the second bottle with its own alarm parameters.
The measurement of resistivity is permanently displayed.

3 relay outputs are to be used either for the input 1 or input 2; adjustments are done by the operator.

The 4-20 mA outputs allow the report of process operations, in order to have a true image of water quality.

Displayed parameters: Measurement values - Configuration Menu
Display: Back lighted - 1 line of 16 alphanumerical characters ; 9,2 mm high
Indication: LED alarms status
Configuration: 8 push buttons keyboard on front face - Keyword protected
Scales: 200 Ω .cm to 200 MΩ .cm
Accuracy: ± 0,3%
Probe input: Coaxial connector BNC type
Input 1: 20 MΩ .cm 
Input 2: adjustable

Temperature compensation:
On range 20 MΩ, automatic with an input for a 3 wires Pt 100 Ω /0°
Manually from 0 to 100°C

CAUTION: with 0.1 sensor Factor there is no automatic compensation (manual only)
Relay outputs: 3 closing contacts (Silver alloy), voltage free

Thresholds:
3 programmable independent thresholds
- with adjustable hysteresis 0…100%
- and adjustable timer from 0 to 9999 sec

Output relay (S4): Not available

Contact:
Initial resistance 100 mΩ as a maximum (voltage drop 6 V DC 1 A)
Rated at 831 V AC / 3 A / 277 V AC ; 90 W / 3 A / 30 V DC
Switching capacity (minimum) 100 mA, 5 V DC (depending of switching frequency, ambient conditions, accuracy)
Mechanical life time (minimum) 5 x10⁶ operations (180 commutation/min)
Electrical life time (minimum) 2 x10⁵ (20 comm./min) [3 A, 125 V AC], [3 A, 30 V DC]
and 105 (evaluated charge) for 3 A, 125 V AC

Calibration sequence: Relay outputs inhibited, analogical outputs stand on last values
Measurement output: 0/4-20 mA (maxi 600 Ω) proportional to measurement, galvanic insulated
Program Testing: Simulation through the menu on measurement and relays outputs
Main power supply: 230 V AC / 50-60 Hz [other on request] - Consumption 10 VA
Models: Wall mounting, IP65, cable glands, connections on screw terminal

OPTION

Data Logger: Cycle average measurement record, with a programmable period, 150000 records maxi on MMC (multi media card) / External driver necessary