Vaisala HMT120 User Manual download pdf (Page 55)

Chapter 5 _______________________________________________________________ Maintenance

VAISALA ________________________________________________________________________ 53

NOTE

not touch the adjustment buttons before the conditions have

stabilized.

11. Using the - and + buttons, make the temperature gain adjustment

by making sure the I

out

current is correct (you have to press either -

or + at least once even if the value is correct).

12. Press the ADJ button one more time. The red indicator LED turns

off and the transmitter returns to normal mode. The calibration

procedure is now finished.

NOTE

In case of calibration error, both LEDs bli

nk alternately at a very fast

rate (cycle time 200ms) for a period of 2s after which the transmitter

returns to normal mode.

NOTE

In case of using a HMT120 transmitter with display option, the

following texts are shown at the display during calibration:

Probe cal: RH 1" corresponding the green LED blinking slowly

Probe cal: RH 2" corresponding the green LED blinking fast

Probe cal: T 1" corresponding the red LED blinking slowly

Probe cal: T 2" corresponding the red LED blinking fast

Probe cal: Error" corresponding both LEDs blinking alternately at

very fast rate

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Vaisala HMT120 User Manual Page 55