Vaisala HUMICAP HMP41 User's Guide download pdf (Page 75)

Chapter 5 ______________________________________________________________ Maintenance

VAISALA _______________________________________________________________________ 73

Analog Output Tests

HMT130 has a built-in software function for testing the analog outputs.

To test the outputs, do the following:

1. Make sure the transmitter is not in adjustment mode.

2. Press the + adjustment button (see Figure 16 on page 58).

This sets the output voltage level to the high point of the analog

output range (for example 10 V). The output stays at this level for

about 30 seconds after the + adjustment button has been pressed.

3. Press the - adjustment button (see Figure 16 on page 58).

This sets the output voltage level to the low point of the analog

output range (for example 0 V). The output stays at this level for

about 30 seconds after the - adjustment button has been pressed.

10 ... 35 VDC

24 VAC

1011-163

Figure 21 HMT130 Output Voltage Measurement

NOTE

If you are using the HMT130 transmitter with the display option, the

following texts are shown at the display during analog output test:

"Analog output test high": analog output set to upper limit

"Analog output test low": analog output set set to low limit

1 2 ... 70 71 72 73 74 75 76 77 78 79 80 ... 95 96

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Vaisala HUMICAP HMP41 User's Guide Page 75