Vaisala PTU300 User's Guide download pdf (Page 100)

User's Guide ______________________________________________________________________

98 __________________________________________________________________ M210796EN-A

Use the command ASEL [xxx yyy] as shown in the example below

when using a device with two analog outputs.

Example:

>asel rh t p <cr>

Ch1 RH low : 0.00 %RH ?

Ch1 RH high : 100.00 %RH ?

Ch2 T low : -40.00 'C ?

Ch2 T high : 60.00 'C ?

Ch3 P low : 500.00 hPa ?

Ch3 P high : 1100.00 hPa ?

Analog Output Tests

Use the display/keypad for testing the operation of the analog outputs

by forcing the outputs to known values. Measure then the outputs with

a current/voltage meter.

1. Press any of the arrow keys to open the MAIN MENU.

2. Select System and press the right arrow key.

3. Select Diagnostics and press the right arrow key.

4. Select Analog output tests and press the right arrow key.

5. Select one of the testing options Force 0%/50%/100% of scale.

Press the TEST key. All outputs are tested simultaneously. The

actual output value depends on the selected range.

6. Press the OK key to stop testing. Then press the EXIT key to

return to the basic display.

ITEST

Use the serial line to test the operation of the analog outputs. Use the

command ITEST to force the analog outputs to entered values. The

set values remain valid until you enter the command ITEST without

parameters or RESET the transmitter.

ITEST [aa.aaa bb.bbb]

where

aa.aaa

= Current or voltage value to be set for channel 1 (mA or V)

bb.bbb

= Current or voltage value to be set for channel 2 (mA or V)

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Vaisala PTU300 User's Guide Page 100