Vaisala DPT145 User's Guide download pdf (Page 29)

Chapter 4 ________________________________________________________________ Installation

VAISALA ________________________________________________________________________ 29

Alternate Wiring for Power Supply

If necessary, you can provide supply voltage using Port I, and only wire

RS-485 for Port II. Do not supply power from both ports.

1108-016

Figure 9 Wiring Power Supply Using Port I

Stabilization of Dewpoint Reading After

Installation

After installation, the transmitter will have a small amount of moisture

inside it. In still, dry gas it takes a long time until vapor pressure inside

the measurement cell reaches equilibrium with the main gas tank. It is not

unusual for the stabilization of the dewpoint reading to take several days

after installation.

1 = VDC+

3 = GND

1 3

15 ... 28 VDC

1 2 ... 24 25 26 27 28 29 30 31 32 33 34 ... 62 63

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Vaisala DPT145 User's Guide Page 29