Vaisala HUMICAP MMT162 Guide de l'utilisateur télécharger pdf (Page 65)

Chapter 6 ___________________________________________________ Calibration and Adjustment

VAISALA ________________________________________________________________________ 63

Temperature Adjustment on Serial Line

Required equipment:

- Computer with

- Windows operating system

- Terminal application

- Free USB port

- Driver for Vaisala USB cable installed

- USB serial interface cable (219690)

- One or two temperature references that fulfill the requirements listed

in section Adjustment Points on page 55.

1. If any cable is connected to port I of the MMT162, disconnect it.

2. Remove the filter from the MMT162 and insert the sensors into the

temperature reference. If you are starting a two-point calibration,

start with the lower temperature reference.

3. Wait at least 30 minutes for the temperature to stabilize.

4. Connect the MMT162 to a PC, see section Serial Communication

on page 22. Then open a terminal program.

5. Enter the l command to view the currently active calibration

coefficients. For more information, see section Show User

Calibration Coefficients on page 42.

6. Enter the ct command and press Enter:

7. Type c and press Enter to update the reading and verify that the

reading has stabilized:

T : 22.3106 1. ref ? c

T : 22.3251 1. ref ?

8. When the reading is stable, enter the reference temperature after the

question mark and press Enter:

T : 22.3261 1. ref ? 22.3

Press any key when ready ...

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Vaisala HUMICAP MMT162 Guide de l'utilisateur Page 65