Vaisala DRYCAP DMT143 Uživatelská příručka stáhnout pdf (Strana 46)

USER'S GUIDE ____________________________________________________________________

44 ___________________________________________________________________ M211435EN-E

Extend Analog Output Range

Use the AOVER command to allow the analog output channels to

exceed their specified range by 10%. The scaling of the parameter

remains as before; the extra range is used for additional measurement

range in the high end of the scale.

AOVER [ON/OFF]<cr>

Example (turning AOVER on):

aover on

AOVER : ON

The following example illustrates how the analog output is affected. The

channel outputs T

with voltage output 0 … 5 V (-80 … -30 °C). After

giving the AOVER ON command, the range is 0 … 5.5 V

(-80 … -25 °C). Note that the -30 °C T

point is still at 5 V.

Test Analog Output

You can test the operation of the analog output with the ATEST

command by forcing the output to a given value. You can then measure

the output with a calibrated multimeter. After testing the output, give the

ATEST command again to exit the test mode.

ATEST [level]<cr>

where

level

Level for analog output channel.

Analog output type determines if the value is V or mA.

The command output shows the test value of the analog output as well as

diagnostic information that may be useful to Vaisala Service if there is a

problem with the analog output.

Example (enabling analog output test mode, setting level to 20 mA):

atest 20

20.000 27407

Example (disabling analog output test mode, resuming normal output):

atest

0.000 15831

1 2 ... 41 42 43 44 45 46 47 48 49 50 51 ... 75 76

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Vaisala DRYCAP DMT143 Uživatelská příručka Strana 46