Vaisala HMP110REF User Manual

M is for metric units, N is for non-metric units.
Parameter Metric unit Non-metric unit
RH %RH %RH
T
d
°C °F
T °C °F
Examples:
unit
Units : Metric
unit n
Units : Non metric
6.9
Calibration commands
6.9.1 Calibrate humidity measurement
Use the CRH command to perform a 1-point or 2-point correction to the capacitance
measurement of the probe. This command changes the oset and/or gain of the humidity
measurement, depending on the calibration and reference:
• 1-point calibration with a single < 50 %RH reference will adjust the oset of the
capacitance measurement
• 1-point calibration with a single > 50 %RH reference will adjust the gain of the capacitance
measurement
• 2-point calibration will adjust both oset and gain. The first point requires a < 50 %RH
humidity reference, the second point must be > 50 %RH. There must also be at least
30 percentage point dierence between the references.
CRH [reference]<cr>
This command is not available on the HMP110T.
When performing a 1-point calibration, you need to place the probe in the reference humidity
and wait for 20 … 40 minutes for the humidity to stabilize. To apply the adjustment, enter the
CRH command with the reference %RH as a parameter.
Example: 1-point calibration (LiCl reference, 11 %RH):
crh 11
OK
Example: 1-point calibration with NaCl reference (75 %RH):
HMP60 and HMP110 Series User Guide M211060EN-J
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Vaisala HMP110REF Specifications

General

Brand	Vaisala
Model	HMP110REF
Category	Measuring Instruments
Language	English