Vaisala HMT310 - Manual (Page 69)

Chapter 7 ___________________________________________________Calibration and Adjustment
VAISALA _______________________________________________________________________ 69
2. Issue command LI and enter value 0 for an offset value and value 1
for a gain value.
3. Issue command CDATE and set the calibration date.
Example:
>cdate 2001 12 11
Calibration : 2001-12-11
>
ACAL Analog Output Calibration
Syntax: ACAL
Connect the HMT310 to a multimeter in order to measure either current
or voltage depending on the selected output type. Issue the ACAL
command. Then type the multimeter reading and press Enter.
Example (current outputs):
>acal
Ch1
I1 (mA) ? 2.046
Ch1 I2 (mA) ? 18.087
Ch2 I1 (mA) ? 2.036
Ch2 I2 (mA) ? 18.071
>
Relative Humidity Calibration and Adjustment
(in Two Points)
Use two reference humidities over the measurement range. The
references need to have a difference of at least 50 %RH.
Before calibration HMT310 needs to be set to adjustment mode by
pressing the adjustment button once, see Figure 17 on page 70. (To return
to normal operation mode, use command RESET, see RESET Reset
Transmitter on page 50).