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General| Category | Controller |
|---|---|
| Manufacturer | Hanna Instruments |
| Model | HI 23 Series |
| Display | LCD |
| Output | 4-20 mA |
Describes the broad connectivity and control capabilities of the HI 23 and HI 24 series controllers.
Describes the four different modes for relays 1 and 2 in the controller.
Explains the idle mode, where control actions are stopped but alarms and analog output remain active.
Details the calibration points and initial preparation for EC and TDS measurements.
Allows setting a user-defined calibration point different from standard memorized points.
Describes the procedure to test the functionality of the device's keyboard buttons.
Explains the selftest procedure for relays and LEDs on the controller.
Details the HOLD function, which freezes analog output and disables relays during maintenance.
Describes the presettable timer for functions like probe cleaning.
Lists the technical specifications for the RS485 communication standard used by the controllers.
Details the pin assignments for the RS485 terminal connections on the device.
Outlines periodic inspection of the probe and cable for integrity and cleanliness.
Details the steps for cleaning the EC/TDS probe, including rinsing and using cleaning solutions.
Lists various Hanna calibration solutions for conductivity measurements.
Lists electrode cleaning solutions available for maintenance.
Provides guidance on suitable environments and safe usage of the instruments.
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