HI 8614N

pH Transmitter with 4-20 mA Galvanically Isolated Output

The HI 8614N is a water-resistant pH transmitter is designed to be used with a standard high impedance pH probe with BNC connector. The signal is then processed by a special high-impedance amplifier, which transmits an output current directly proportional to the input signal but independent of changes in load or cable capacitance.

Calibration is performed by the adjustment of two independent trimmers — slope and offset.

Temperature compensation is performed by the transmitter’s ATC (Automatic Temperature Compensation) circuitry when measurements are taken with a temperature probe attached; if ATC is not required, it is also possible to substitute a fixed resistor for the temperature probe. The transmitter can be connected to HANNA controller
HI 8510, HI 8710 or HI 8711, recorders, computers or any data monitoring device that accepts 4 to 20 mA input.

Specifications
Range  0.00 to 14.00 pH; 4–20 mA
Accuracy @ 20°C  ±0.02 pH; ±0.02 mA
Calibration  offset: ±2 pH; ±2.2 mA; slope: 86 to 116%; ±0.5 mA
Temperature
Compensation  fixed or automatic from 0 to 100°C (32 to 212°F) with HI 76608 probe
Input Impedance  1012 Ohm
Recorder Output  4-20 mA (isolated)
Protection  IP65
Power Supply  18-30 VDC
Load  max 500 Ohm
Environment  0 to 50°C (32 to 122°F); RH max 95% non-condensing
Dimensions  165 x 110 x 71 mm (6.5 x 4.3 x 2.8’’)
Weight  1 kg (2.2 lb.)

Accessories
Solutions
HI 7004L  4.01 pH Buffer Solution
1 x 500 mL bottle
HI 7007L  7.01 pH Buffer Solution
1 x 500 mL bottle
HI 7010L  10.01 pH Buffer Solution
1 x 500 mL bottle
Accessories
HI 6054B  Electrode Holder for In-line Installation, 3/4x16UNF Thread
HI 931002  4-20 mA Amperometer, Simulator and Calibrator
HI 931001  pH and mV Precision Simulator