Manufacturer: Hanna Instruments
Brand: Hanna Instruments
Model: HI8931BN
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The Hanna Instruments HI 8931BN panel-mount analog controller monitors electrical conductivity, has automatic temperature compensation, manual two-point calibration, and an LCD screen. The controller receives input from a probe or transmitter (sold separately) for constant monitoring of electrical conductivity from 0 to 19.99 millisiemens/cm with a resolution of 0.01 millisiemens/cm. Automatic temperature compensation (ATC) and manual two-point calibration through offset and slope trimmers provide accurate measurements and reporting. The backlit LCD screen displays measurement values for ease of calibration, process monitoring, and verification. A user-defined setpoint triggers an alarm when conductivity values are outside of an acceptable range. The controller has selectable dosing control that can be set to manual, automatic, or off for industrial process management. For safety, an over-dosing control knob provides adjustment between 5 and 60 minutes, or over-dosing can be disabled altogether. For data recording, it includes two output terminals in 0 to 20 mA and 4 to 20 mA configurations. The controller is designed for use with the HI 7635, HI 7638, or HI 3001 platinum conductivity potentiometric probes (sold separately) and an HI 8936 transmitter (optional, sold separately). The black anodized aluminum body provides durability, and the front and back panels are acrylonitrile butadiene styrene (ABS) plastic for strength, impact resistance, and heat resistance. It comes with mounting brackets and instructions.SpecificationsConductivity (EC) range0 to 19.99mS/cmResolution0.01mS/cmAccuracy range at 20 degrees C/68 degrees F+ or - 2% of full scale (excluding probe error)CalibrationManual, 2 point, with offset and slope trimmersInputDIN (probe) or 4 to 20 mA (transmitter)Recorder output0 to 20 mA and 4 to 20 mATemperature compensationAutomatic, 0 to 60 degrees C (32 to 122 degrees F) with Î’=2%/degrees CSetpoint relay and alarm relay1, isolated, 2 amp, max 240V, resistive load, 1,000,000 strokesProtection rating...