Hanna HI9931-2 在线EC控制器

EC Range: 0.00 to 10.00 mS/cm
EC Resolution: 0.01 mS/cm
EC Accuracy: ±2% F. S
EC Calibration: Through "ZERO CAL" and "SLOPE CAL" trimmers
EC/TDS Temperature Compensation: automatic, 0 to 50°C (32 to 122°F) with β = 2%/°C
EC to TDS Conversion Factor: 0.65 mg/L (ppm) = 1 µS/cm
EC/TDS Dosing Set Point: from 0 to 1999 ppm (mg/L)
EC/TDS Proportional Band: TDS from 50 to 450 ppm and time cycle from 0 to 90 seconds
General Meter
EC/TDS Probe: four-ring potentiometric with built-in temperature sensor (not included)
Process Control Meter
Alarm Relay Set Point: terminals can be configured as normally open or normally closed (isolated output max. 2A, max. 240V, resistive load, 1,000,000 strokes). The alarm is activated if TDS exceeds by more than the user- selectable interval (0 to 400 ppm) from the set point or
Alarm Relay Range: relay (115 to 240V, max.2A, 1,000,000 strokes) are activated whenever TDS falls below the set point
Analog Ouput Signal : selectable at 0-20 mA or 4-20 mA (isolated)
Enclosure: Fiber-reinforced, self-extinguishing ABS
Environment: -10 to 50°C (14 to 122°F) max. 95% RH non-condensing
Dimensions: 221 x 181 x 86 mm (8.7 x 7.1 x 3.4’’)
Weight: 1.6 Kg (3.5 lb.)

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