HI 22

Industrial Grade ORP Digital Controllers Wall Mounted with Matching Pin

The HI 22 controllers have been engineered with the same outstanding quality and features as the HI 21 meters.
The Fail Safe Alarm System protects these meters against the pitfall of process control, like power interruption or line failure. User selectable timing capability safeguards against overdosing and saves money while protecting the environment. RS485 capability makes this model PC compatible. The microprocessor memory is fully programmable and has a 3-month backup power supply.

These instruments have a differential input, extending electrode life by eliminating ground loop current through the reference. Users can choose between ON/OFF and proportional control as well as selectable current and voltage outputs. For more flexibility and better resolution for chart recorders, choose any two points between 0 and ±2000 mV to correspond to the analog output spans.

Wiring the controllers is simple with extractable terminal modules. A host of self-testing features and user-friendly functions make HI 22 a great value.

Specifications
Range ORP ±2000 mV
Temperature -9.9 to 120°C
Resolution ORP 1 mV
Temperature 0.1°C
Accuracy @ 20°C ORP ±2 mV
Temperature ±0.5°C
Input Impedance  1012 Ohm
ORP Calibration  automatic, at 0 and 350 or 1900 mV
Analog Output  0 to 1 mA, 0 to 20 mA, 4 to 20 mA; 0 to 5 VDC, 1 to 5 VDC, 0 to 10 VDC
Digital Output  RS485
Relays 1 and 2  electromechanical relay SPDT contact outputs, 5A-250 VAC, 5A – 30 VDC (resistive load) (HI 221YZ), fuse protected: 5A, 250V fast fuse
Alarm Relay  electromechanical relay SPDT contact output, 5A – 250 VAC, 5A – 30 VDC (resistive load) Fuse protected: 5A, 250V, 250V fast fuse
Power Supply Input  ±5V (for amplified electrodes)
Power Supply  115 VAC ±10% or 230 VAC ±10%; 50/60 Hz
Power Consumption  15 VA
Over Current Protection  400 mA, 250V, fast fuse
Environment  0 to 50°C (32 to 122°F); RH max. 85% non-condensing
Protection  IP 54
Dimensions  221 x 181 x 86 mm (8.7 x 7.1 x 3.4’’)
Weight  1.4 kg (3.1 lb.)

Accessories
Solutions
HI 7020L  ORP Test Solution at 200/275 mV (@20°C)
1 x 500 mL bottle
HI 7091L  Reducing Pretreatment Solution
1 x 500 mL bottle
HI 7092L  Oxidizing Pretreatment Solution
1 x 500 mL bottle
Accessories
HI 8427  pH and mV Precision Simulator
HI 931001  pH and mV Precision Simulator