The Hanna Instruments HI 931002 4-20 mA Amperometer, Simulator and Calibrator can monitor and regulate 4-20 mA from
practically any process meter with or without a voltage generator. The communication bus from process instrumentation
can be simulated in any of the following modes:
Passive drive/Calibrator mode:
The Hanna Instruments HI 931002 can set the 4-20 mA current values and the user can then adjust the process meter
Active drive/Simulator mode:
The Hanna Instruments HI 931002 simulates the correct current values as above in addition to providing power to the
bus communication. Power is provided through an external adapter (included) which is connected to the simulator. This
mode is ideal to calibrate chart recorders, pressure transducer or current indicators.
Passive measurement/Tester mode:
The Hanna Instruments HI 931002 practically becomes an Amperometer. It measures and displays the mA (or pH) values
transmitted by the process meter.
Active measurement/Tester mode:
Same as above in addition to providing voltage to the 4-20 mA bus. The Hanna Instruments HI 931002
Amperometer/Simulator/Calibrator can measure incoming current, provide power, and simulate 4-20 mA output to
calibrate your process meter. A large LCD shows values on the display. You can select between drive and measurement
modes through a switch on the front panel and two dials allow for quick adjustment of the current.