Vaisala HMT360N - Manual (Page 67)

Chapter 6 __________________________________________________ Calibration and Adjustment
VAISALA _______________________________________________________________________ 65
Connections
0505-293 Figure 24 Connecting Power Supply and Multimeter for
Calibration
1. Connect a power supply (12 ... 24 VDC, with a serial port the
minimum supply voltage is 15 VDC ) to the terminals B1 (-) and
C1 (+) (Ch 1) with banana plugs, see
Figure 24 on page 65 .
2. Connect the multimeter in series with the supply, B1 (-) and
A1 (+).
3. Follow the same procedure with Ch 2 using the terminals B2 (-)
and C2 (+). When calibrating both channels at the same time, use
two galvanically separated power supplies.
You can now calibrate or check the dewpoint and temperature or the
analog outputs according to the instructions given in this chapter.
If the current measurement is needed in a hazardous area, the
multimeter is connected to the terminals A1/A2 (+) and B1/B2 (-). Use
only an approved multimeter.
A1
B1
B2
A2
C1
C2
On
Off