HK Instruments DPI+/-500-D, Быстрый старт

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Zero point adjustment
Note! Supply voltage must be connected one hour before the 0-point adjustment is carried out.
1) Disconnect both tubes from the pressure and –
2) Push both arrow buttons or select “Zero” from the menu
green led turns
off and “Zero” text followed by a counter from 3 to 0 seconds is displayed
3) Wait until the green led turns on again and then connect the tubes back to
the pressure inlets
It is recommended to adjust the zero point every 12 months during normal operation.
* If the transmitter is equipped with automatic zero element the manual push button adjustment is not required.
* Auto zero element
Optional auto zero element makes the DPI maintenance free of periodical push button zeroing. The AZ
element automatically adjusts the zero point of the transmitter from time to time; this eliminates the zero
point long term drift of the piezo resistive sensing element.
Zero point adjustment takes about 4 seconds to perform and it is carried out every 10 minutes. Initially
after power on, zero point is adjusted more often. After some time it is carried out every 10 minutes.
During zero point adjustment the 0...10V output and relay outputs maintain their values and the display
shows “zero” text.
If zero point is adjusted manually there is no need to disconnect the tubes when transmitter is equipped
with the auto zero element.