Vaisala HMT130 - Manual (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.
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
SG
ND
CH1 CH2
SH
IEL
D
VI
N-
VI
N+
V
V
10 ... 35 VDC
24 VAC
+ -