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CONTROLLERS > PANEL MOUNT

Industrial Catalog - 9073 HI504 pH/ORP Controller with Sensor Check

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Receive electrode status &diagnostic messages on the lcd display or via your mobile-phone!*

Direct Wire Connection or Tele-Control through an RS485 Port

The RS485 output is a versatile interface thatcan be used for connecting the HI 504controller to many other devices. The simplest configuration is a direct wireconnection to a PC (with distances up to1.2 km), or it is possible to use either a traditional or GSM modem.The remote control can be managed with theHI 92500 Windows® compatible software. Once connected, the user can interact with the system, view parameters in real time,download process data relative to the last100 events that have occurred and, if neces- sary, modify or reconfigure program settings(setpoints, alarms, cleaning cycles, stand-bytimes, etc.). When a connection is kept active, it is possible to continuously down-load and automatically store the process datain Excel® format. This data, once saved, can be easily organized into tables and graphs, used for creating records and supervisingprocess progression.

Sensor Check

TM

pH/ORP

As part of the powerful self-diagnostic functions of this instrument series, the Sensor Check™system provides continuous inspection of probe status. The test is not limited to a simple signal that indicates an error in progress, but it reports the nature of the breakdown with aspecific error code. With the use of the HI 504900 GSM module, errors or alarms can be sentdirectly to the operator's mobile phone as SMS message.
Broken electrodeDirty electrodeElectrode not immersed

Here are the types of breakdowns shown by sensor check:>pH electrode broken>Reference electrode dirty>Reference electrode or matching pin not immersed>Electrode junction dirty or clogged>Short-circuit between cables of pH and reference electrodes>Signal problems from the cable or connector due tohumid or dirty environments

RS485 Network

The RS485 output allows users to create a network composed up to 32 instrumentsusing a simple double-wire cable. The com- munication speed (up to 19200 bps) allowsthe user to establish an RS485 networkcovering an area of up to 1.2 km between the two instruments at both extremities ofthe network.The network can be created with HI 504units or any other HANNA instruments®. industrial controllers with RS485 output (pH502, mV 602, etc.). The entire network canbe managed by our HI 92500 software, using a simple wire connection to a PC, with theHI 504902 traditional modem or a GSMmodule (HI 504900 or HI 504901). The internal circuit of the instrument executes two independent tests, one for the probe andone for the reference chamber, measuring the respective impedance values every 30 seconds.These tests last for a very short period to avoid electrolysis and polarization, which can becaused by a prolonged exposure to an electric current.

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 glassbulb of a pH probe, the sensor of an ORP probe or the reference junction. To solve these prob-lems the HI 504 series has been equipped with an automatic cleaning system (simple or advanced, depending on model) with programmable cycles.The Simple Cleaning is a simple wash with either water or detergent, programmed by settingthe rinse time and the pause length. The Advanced Cleaning uses both water and detergent, and allows the user to program three stages, with the possibility to vary the sequence, the time, and the number of cycles. The advanced mode can also be triggered at any time from aremote control or through the isolated digital input on the rear panel, which can be connectedto an external switch. The controllers can also automatically activate both cleaning modes whenever the sensor check reveals a soiled probe. It is possible to set a delay time beforerestarting the reading after a cleaning cycle has taken place; this allows the probe to adjustto the new operating conditions.
* Compatible phones, plans & SIM cards must be purchased separately from an outside provider and is not in any way covered by HANNA Instruments®

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Industrial Products Catalog
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