The HI504 Series offers elevated performance capabilities, rugged design and exploit an intelligent and advantageous use of tele-control technology. The different models of the HI504 series are designed to fit your individual needs, able to satisfy whatever application of monitoring and regulation you might require. Couple with Hanna industrial pH and ORP probes to meet all your industrial monitoring needs.
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HI504 is a PID, PI, digital 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 LED’s on the front panel and on the LCD display.
Hanna’s 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.
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.
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™ performs self-diagnostic and troubleshooting functions by continuously verifying the electrode status based on impedance movement of the glass and reference measurement.
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.
The controller logging feature can save up to 6000 samples pH/Check°C or ORP and last 100 error, con guration, calibration and cleaning events. This information is accessible from a PC through RS485 and HI92500 software.
2.00 to 16.00 pH
0.01 % pH
2000 to 2000 mV
-30 to 130.0 ºC
0.1 ºC above -10 ºC; 1 ºC below
±0.5 ºC (-9.9 to 130.0 ºC); ±1 ºC (-30 to -10 ºC)
Typical EMC Deviation
±0.2 pH; ±10 mV; ±0.5 ºC
Digital Input for the pH/ORP/°C Transmitter: RS485 Other Digital Insulated Inputs: 2 digital insulated inputs: 1 for hold and 1 for the advanced cleaning, ON state: 5 to 24 VDCD
A digital insulated contact closed upon hold mode
Automatic or manual from -30 to 130 ºC
• 2 independent outputs
• 0 – 22 mA (configuring as 0-20 mA or 4-20 mA)
6000 pH/°C or ORP samples
Temperature Probe: With 3-wire or 2-wire Pt100/Pt1000 sensor (with automatic recognition and damage test)
230 Vac, 115 Vac or 100 Vac ±10%; 50/60 Hz
Over Current Protection
Electromechanical relay SPDT contact outputs,
5A-250 VAC, 5A – 30 VDC (resistive load)
Fuse protected: 5A, 250V Quick Blow Fuse
Max. Oscillation Frequency
Electromechanical Relay SPDT contact output,
5A – 250 VAC, 5A – 30 VDC (resistive load)
Fuse protected: 5A, 250V Quick Blow Fuse
0 to 50 ºC; max 85% RH non-condensing
Enclosure: single case ½ DIN
Casing:IP20 (housing); IP54 (front panel)
approximately 1.6 kg (3.5 lb.)
BL981411-0 (12 VDC) and BL981411-1 (115V) are supplied with mounting brackets, transparent cover, and instruction manual.