Vaisala QMD202 Technical data

Vaisala Fixed Display QMD202

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Features/Beneﬁts

LCD display with backlighting

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Stand-alone design allows

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installations up to 1000 meters from the data logger

Measurement values are

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easily viewed

Freely conﬁgurable by the user

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by using the MAWS Lizard Setup software

Easily accessible keypad with

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user-friendly menu

Data and system parameters

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can be entered via the keypad

Communication via SPI,

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RS-232, or RS-485 line

DIN rail mounting

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Local User Interface for MAWS

The HydroMet system can be equipped with the QMD202 display and keyboard unit at the installation site where the operator needs to see the measurement values locally and insert observations or reference data into the system.

Vaisala Fixed Display QMD202 provides the local user interface for viewing the values measured and calculated by the MAWS logger. The display allows up to 24 user display pages to be congured by the MAWS Lizard Setup software. In addition, it is possible to create conguration views for adjusting station specic settings and changing the offset and gain values of the sensors connected to the system.

Installation Inside the Enclosure

The QMD202 unit can be mounted on a DIN rail inside the standard MAWS enclosure. Access is only by opening the enclosure door, which can be rmly locked.

Installation Outside the Enclosure

The QMD202 unit can also be installed outside the MAWS enclosure via the RS-232 or the full-duplex RS-485 connection. The RS-485 connection together with a DSI485 module installed into the MAWS data logger allows installations up to 1000 meters from the logger.

LCD Display

The QMD202 display includes a programmable LCD display with backlighting. Several lines of alphanumeric data can be shown. The full display size expressed in characters is 20 x 6 (width x height). The displayed data is sent as reports to the display. The contents, format, and updating intervals of these reports are user-congurable. The update interval can be anything between 1 second and 24 hours.

Technical data

Electrical

Input voltage Vin

RS232/485 8 ... 18 VDC

SPI

Power consumption

SPI mode, backlight OFF 20 mW SPI mode, backlight ON 85 mW RS485 mode, backlight OFF 96 mW @ 12 V RS485 mode, backlight ON 252 mW @ 12 V RS232 mode, backlight OFF 132 mW @ 12 V

RS232 mode, backlight ON 276 mW @ 12 V Interface RS-232 / RS-485 / SPI Connector for RS-232, RS-485 and power supply 8-pin M12

RS-232 1200, 2400, 4800, 9600 bps

RS-485 Full duplex, non-isolated,

SPI Connected to and powered by

the MAWS data logger via a 10-wire ﬂat cable

Communication distances

RS-232 30 m

RS-485 1000 m

SPI Inside the MAWS enclosure

3.3 and 5.0 VDC powered from the MAWS data logger

(default 9600 bps)

1200, 2400, 4800, 9600 bps

(default 9600 bps)

Mechanical

Dimensions 127 x 95 x 29 mm Weight 230 g Mounting NS35 DIN rail foot Enclosure material Aluminium LCD Display Size (width x height) 20 x 6 characters

Environmental

Operating temperature -25 ... +60 °C Storage temperature -60 ... +60 °C CE Compliant IEC(EN)-61326-1,

For use in industrial locations

Vibration IEC 60068-2-6, level 2 g

Example of QMD display.

For more information, visit www.vaisala.com or contact us at sales@vaisala.com

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