pH, mV, Conductivity and TDS Panel Mount Controllers

Fail-Safe Protection The Fail-Safe alarms protect processesagainst critical errors arising from power interruptions, surges and human errors. The sophisticated yet easy-to-use system resolves these problems on two fronts: hard- ware and software. To eliminate blackout and line failure problems, the alarm function operates in a “Normally Closed” state and goes off if the wires are accidentally tripped, or when the power is down. This is an impor- tant feature since with most meters the alarm terminals close in abnormal situations, but no alarm is sounded with a line interrup- tion, causing extensive damage. With our controllers, software is employed to set off the alarm in abnormal circumstances, for example, if the dosing terminals are closed too long. The alarm message is also displayed on the LCD. The primary display showsmeasurements, visible from a distanceThe secondary displayshows temperature reading or calibration dataLED indicators allow aconstant assessment of the operating status of the meter and relay contacts, even from a distanceCFM key confirms setparameter valuesThe advanced technology of theinternal microprocessor allows finetuning of process parametersfor enhanced efficiencySimple automatic calibrationand temperature compensationwith visual prompts A 4-digit password protectsthe setup parameters toprevent tamperingDisplays various parametersand returns to normaloperation modeRecalls calibration data toensure accuracy and compliance with procedures Save Money with Custom Programs These series of controllers put a host of parameters at your disposal to prevent over- dosing or costly system failures. You can set your high and low set point hysteresis bands independently to fine tune dosing processes with the ON/OFF controllers. Similarly, the proportional band and time period are user- programmable to save on slow reacting chemicals, which are commonly overdosed. Moreover, the mV 602 series include models with PID (Proportional Integrative Derivative) control. All models offer an adjustable timer from 10 minutes to 7 days as the maximum time that the relay contacts may remain closed. An important feature in case of sudden chemical depletion. In addi-tion, a contact for level control ensures proper functioning of the process. Two ID numbers to identify a specific process in aparticular factory High and low setpoints can be adjusted with 0.01 pH,1 mV, 0.1 µS and 0.01 ppm resolution The hysteresis bands in ON/OFF controls can be regulated with 0.01pH, 1 mV, 0.1 µS and 0.01 ppm resolution The span in proportional controls can be fine tuned in all measurement ranges Setting of the reset and rate times for models with Pid control
Galvanically Isolated Outputswith Zoom Two independent alarm bands for high and low setpoints to guarantee a timely warning
Some models incorporate hardware selectableisolated current or voltage output. These candrive auxiliary devices, chart industrial recorders and provide remote monitoring. Users can also zoom on to any 2 points from the full meas- urement scale. These lines of industrial con-trollers include models that provide controlthrough analog output. Now any compatible device such as electrovalves or pumps may be driven with these advanced controllers. Choose the max. time the relay contacts may remain closed before the alarm is triggered Setting of the analog output range (mA or VDC) andcorresponding measurementranges (pH, mV, EC and TDS)
Simple to Use Password Protection The large, dual-level LCD shows both pH (or mV) or EC (or TDS) and temperature and guidesoperators through calibration and programming with step-by-step prompts. The choice of ON/OFF, proportional and PID control provides extra versatility and makes it possible to pickthe process controller that best fits your application. Keeping track of multiple controllers indifferent plants is made easy. These advanced controllers can be identified with both a factory and a process ID. HANNA instruments® password protectionfeature keeps these controllers safe fromtampering. Only users with the proper pass- word can change the settings of these hi- tech controllers. The HANNA instruments® line of industrial microprocessor-based controllers offer a multitudeof features such as single and dual setpoints, ON/OFF, proportional and PID control, relay out- puts, user-selectable zoom, bidirectional isolated RS232, RS485 port, isolated recorder outputs in mAmps and Volts, and much more. 6 Industrial Products Catalog • 800-504-2662 • ind@hannainst.com