อุปกรณ์วัด Control System (Conductivity Analog Controller with Input from Probe or Transmitter 1 µS/cm resolution)

HI 8931CN

Conductivity Analog Controller with Input from Probe or Transmitter 1 µS/cm resolution

HI 8931 is a panel mounted conductivity controller designed for simplicity of use. For in-line applications, use the HI 7635 probe, while for tanks the HI 7638 with external threads is recommended. These probes are provided with a built-in NTC sensor for temperature compensated conductivity measurements.

HI 8931 also features a direct connection up to 20 m (67′), without needing to amplify the signal to the conductivity probe.

Using the HI 8931 in conjunction with a 4-20 mA output transmitter (HI 8936 or HI 8936L series) will assure a strong, interference free signal at distances up to 300 meters (1000′).

Specifications

Range  0 to 1999 µS/cm
Resolution  1 µS/cm
Accuracy @ 20°C  ±2% F.S. (excluding probe error)
Input from Transmitter  HI 8936C / CL
Temperature
Compensation  automatic, 0 to 60°C with ß=2%/°C; see also transmitter HI 8936
Inputs  DIN (probe) or 4-20 mA (transmitter)
Conductivity Probe  HI 7635 for in-line applications or HI 3001D for flow-thru (not included)
Calibration  manual, two point, through offset and slope trimmers
Recorder Output  0 to 20 mA or 4 to 20 mA (isolated)
Setpoint and
Alarm Relay  1, Isolated, 2A, max. 240V, resistive load, 1,000,000 strokes
Setpoint Range  0 to 1999 µS/cm
Alarm Range  0 µS and 1000 µS
Dosing Control  OFF/AUTO/ON with selection switch
Over Dosing Control  adjustable, from 5 min to 60 min with knob or disable by wire strap – on rear panel
Backlight  continuous on
Power Supply  115 VAC ±10% or 230 VAC ±10%; 50/60 Hz
Enclosure  flame retardant ABS body and front panel; transparent splash-proof front cover
Environment  -10 to 50°C (14 to 122°F); RH max 95% non-condensing
Panel Cutout  141 x 69 mm (5.6 x 2.7″)
Weight  1 kg (2.2 lbs.)

Accessories

Solutions
HI 7035L  111800 µS/cm EC Solution, 500 mL Bottle
HI 7039L  5000 µS/cm EC Solution, 500 mL Bottle
HI 7033L  84 µS/cm EC Solution, 500 mL Bottle
HI 7031L  1413 µS/cm EC Solution, 500 mL Bottle
HI 7030L  12880 µS/cm EC Solution, 500 mL Bottle
HI 7034L  80000 µS/cm EC Solution, 500 mL Bottle
Probes
HI 3001D  Flow-thru Conductivity Probe with DIN Connection and 3 m cable