Vaisala HMM211 - Manual (Page 26)

USER'S GUIDE____________________________________________________________________
Temperature
NaCl °C
°F
%RH 15
59
75.6 20
68
75.5 25
77
75.3 30
86
75.1 35
95
74.9
4 ... 20 mA mA 16.10 16.08 16.05 16.02 15.98
0 ... 20 mA mA 15.12 15.10 15.06 15.02 14.98
0 ... 1 V V 0.756 0.755 0.753 0.751 0.749
0 ... 5 V V 3.780 3.775 3.765 3.755 3.745
0 ... 10 V V 7.56 7.55 7.53 7.51 7.49
*) If the LiCl solution is used or stored in temperatures below +18 °C (+64 °F), the equilibrium
humidity of the salt solution may change permanently.
Temperature Calibration
NOTE The temperature channel of the HMM211 is very stable and the modules
have been calibrated at the factory. Unless there is a strong reason to
believe that the adjustments have changed, do not perform a temperature
calibration. This is a very demanding procedure and requires both
expertise and extremely accurate references. Furthermore, it is important
to allow enough time for the stabilization during calibration. If for some
reason it is necessary to perform the temperature calibration, follow
attentively the instructions given in this section.
Temperature Calibration of an RH and T
Module
1. Allow enough time for the instruments to stabilize to the
temperature in which calibration is performed.
2. Connect a jumper to the T offset or the T gain pins. The
temperature signal is now on Channel 2. Adjust the reading with
UP and DOWN switches (see Figure 5 on page 25). Note that
during gain adjustment, the offset point does not change:
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