Vaisala MMT330 - Manual (Page 121)

Chapter 4 _________________________________________________________________ Operation
VAISALA _______________________________________________________________________ 119
Analog Output Tests
Use the display/keypad to test 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 buttons to open the Main Menu.
2. Select System
by pressing the ► arrow button.
3. Select Diagnostics
by pressing the ► arrow button.
4. Select Analog output tests
by pressing the ► arrow button.
5. Select one of the testing options Force 0%/50%/100% of scale.
Press TEST to confirm your selection. All outputs are tested
simultaneously. The actual output value depends on the selected
range.
6. Press OK to stop testing. Press EXIT to return to the basic display.
ITEST
Use the ITEST command to test the operation of the analog outputs. The
ITEST command forces the analog outputs to entered values. The analog
outputs remain at these values until you enter the command ITEST
without parameters or reset the transmitter.
ITEST [aa.aaa bb.bbb cc.ccc]<cr>
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)
cc.ccc = Current or voltage value to be set for channel 3 (optional)
(mA or V)
Example:
>itest 20 5
Ch1 (aw ) : * 20.000 mA H'CCDA
Ch2 (T ) : * 5.000 mA H'34B9
>