Both electrode and transmitter compatible inputs accepted
- Selectable manual ON, OFF and automatic dosing control with indicator
- Built-in auto-diagnostic function for offset and slope
- Both 4-20 and 0-20 mA output user selectable, all in one instrument
- Backlit LCD
- Transparent splash-proof cover included
- Operational mode LED indicators
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′).
The HI 8931 series is supplied with mounting brackets and instructions.
|Range||0.0 to 199.9 mS/cm|
|Accuracy @ 20 °C||±2% F.S. (excluding probe error)|
|Input from Transmitter||HI 8936A / AL|
|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)|
|1, Isolated, 2A, max. 240V, resistive load, 1,000,000 strokes|
|Setpoint Range||0.0 to 199.9 mS/cm|
|Alarm Range||0.0 mS and 100.0 mS|
|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|
|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.)|