HI504 is a PID, PI, proportional or on/off pH/ORP controller with one or two set points. The measurement configuration settings and control of pH and ORP are saved separately and permits users to switch between pH and ORP without losing settings. The pH channel can be calibrated in 2 calibration points. The instrument has a full auto diagnostic procedure. Sensor Check is also available for pH and ORP probes.
The temperature is continuously monitored using a temperature sensor (Pt100 or Pt1000 type) with automatic temperature compensation of pH.
One or two analog controller outputs (0-20 or 4-20 mA) can be configured for pH/ORP recording or controlling (only for models with PID), and relays can be used to control the process or be connected with alarm status.
Controller status is visable with LEDs on the front panel and on the LCD display.
Fail Safe Alarm System - Hannas exclusive Fail Safe Alarm System protects against problems caused by power supply failure or signal interruption, which are typical risks in industrial environments. An alarm condition is indicated by a red LED, located directly on the front panel of the controller.
Programmable Cleaning Cycles - Heavy-duty applications often require almost continuous probe maintenance. Elements such as suspended solids, fat, oils, pigments and microorganisms can quickly deposit and soil the glass bulb of a pH probe, the sensor of an ORP probe or the reference junction. Programmable cleaning cycles allow for scheduled maintanence to keep the probe functioning optimally.
Analog Output: Data Logging or PID Dosage Control - Models are available with one or two analog outputs. These outputs can be connected to a recorder for the catalogging of process data (pH/mV and temperature), or can be used for controlling dosing systems (pumps or electrovalves) using PID control.
Sensor Check pH/ORP - Sensor Check performs self-diagnostic and troubleshooting functions by continuously verifying the electrode status based on impedance movement of the glass and reference measurement.
Programmable Hold System - The hold function allows the user to stop the regulating action of the controller for programmable time periods. It is possible to activate the hold periods in correspondence to programmed operations, such as plant maintenance and cleaning procedures.
Logging Capabilites - The controller logging feature can save up to 6000 samples pH/CheckC or ORP and last 100 error, con guration, calibration and cleaning events. This information is accessible from a PC through RS485 and HI92500 software.
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K S Metkari (hanna Equipments (india) pvt ltd)
Office No.4, First Floor, Nehru Nagar,
Kottivakkam,IT Express Highway,
OMR, Chennai – 600041, Perungudi, Tamil Nadu - 410210, India
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