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Zero-point adjustment
Note! Supply voltage must be connected one hour before the 0-point adjustment is carried out.
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.
Optional auto zero element *
Dimensions
HK INSTRUMENTS OY
FIN-40950 MUURAME FINLAND
1) Loose both tubes from the pressure inlets + and –
2) Push zero button until the red led turns ON.
3) Wait until LED turns off and then install tubes again to the pressure inlets
Optional auto zero element makes the DPT transmitter maintenance free for
periodical push button zeroing. Element automatically adjusts the transmitters
zero point from time to time, this eliminates the zero point long term drift of the
piezoresistive sensing element.
Zero point adjustment is carried out every 10 minutes. During zero point
adjustment the output and display values will freeze to the latest measured
value. The automatic zero point adjustment takes 4 seconds.
90.0
Pa
DPT
36.0
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