Specifications HI8512 Range ±1000 mV Resolution 1 mV Accuracy (@25°C/77°F) ±5 mV; ±0.5% (input from transmitter) Input high impedance 10¹² Ohm; reference and matching pin inputs are available; 4-20 mA Power Output ±5 Vcc; 150 mA max load for amplified electrodes Calibration Offset: ±200 mV with CAL trimmer Recorder Output 0-20 mA or 4-20 mA (isolated) Backlight continuous on Power Supply 115 or 230 Vac; 60/50 Hz Enclosure flame retardant ABS body and front panel; transparent splash-proof front cover Environment -10 to 50°C (14 to 122°F); RH max 95% non-condensing Panel Cutout 141 x 69 mm (5.6 x 2.7’’) Weight 1 kg (2.2 lb.) Ordering Information The HI8512 is supplied complete with mounting brackets and instructions. Accessories HI8427 pH / ORP electrode simulator HI8615N ORP transmitter HI8615LN ORP transmitter with display HI8512 ORP Analog Indicator with Self-Diagnostic Test • Auto-diagnostic tests for electrode and instrument status • Backlit, LCD display • A removable, transparent splash-proof cover protects the front panel. Built-in autodiagnostic functions to enable the user to check and troubleshoot any malfunctions. The functions are made via front panel keys to isolate the cause of malfunction whether it is due to pH electrode contamination, internal offset circuit or the amplifier circuit. To enhance troubleshooting and the ability to record data while monitoring, simply attach a recording device to the instrument’s 4 to 20 mA output contacts, conveniently located on the front panel, to obtain a copy of the results on demand. HI8512 is provided with membrane keypads on the front panel, large display, and autodiagnostic functions to check pH electrode and instrument status. HI8412 allows for quick and easy connection to any ORP meter or transmitter. LED indicators identify the controller mode. 1. BNC socket for ORP electrode 2. Input from amplified electrode 3. Power supply terminals 4. Fuse holder 5. Recorder output terminals 6. Connection to the transmitter 7. Power for amplified electrode 8. Connection for matching pin 9. Connection for reference electrode ORP solutions begin on page 2.170 15 Process Instrumentation 15.78 | www.hannainst.com controllers
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