User manual VAISALA GMW20

[. . . ] Vaisala's GMW20 series transmitters use silicon based CARBOCAP sensor with excellent stability and reliability properties. The reading of the GMW20 can be checked and adjusted with the serial com adapter 19040GM and the calibration software available from www. [. . . ] With a pliers) cut-out by removing the attenuated part at lower edge of the back plate. Center the hole in the base over the drilled holes and fasten the base to the surface by using the screws. Install the PCB into the base by aligning it over the latch pins and press down the upper right corner until it snaps into place. Connect the common wire to terminal 0 and the other wire either to terminal V (voltage output) or to the terminal mA (current output). If the unit has an optional accessory (relay, display and relay, LonWorks interface, or temperature module), follow the procedure described in the applicable manuals before repositioning the cover. Connecting power wires to the output terminal can seriously damage the product. Although the power input includes a halfwave rectifier, it is recommended to use a DC supply to avoid current peaks (Current consumption: peak 170 mA, average 85 mA). When more than one transmitter is connected to one 24 VAC transformer, a common loop is formed and the risk of a shortcircuit increases. To avoid this, separate floating supply for each transmitter is recommended (see Figure 3). In case where several transmitters have to share one transformer, the phase () must always be connected to 24V connector in each transmitter to maintain the "polarity" and to avoid short-circuit via shared common line at the controller as shown in Figure 4. Figure 4 Connection of one AC supply to several transmitters Accuracy at 25 °C against certified factory references (includes repeatability and calibration uncertainty) Long-term stability Response time (0 . Weight GMW21 GMW21 with display GMW22 GMW22 with display Transmitters can be ordered with or without relays. [. . . ] Please observe that this manual does not create any legally binding obligations for Vaisala towards the customer or end user. Html This product is covered by an extended 2 year warranty Technical Support For technical questions, contact the Vaisala technical support via email: helpdesk@vaisala. [. . . ]