Owner manual

2. Plug in the connection cable 219690to the service port of the HMDW110

series transmitter, and the other end to a free USBport on your computer.

3. Remove the filter on the probe. This exposes the sensors to damage, so

handle the transmitter carefully.

4. Unplug the Ø12 mm hole on the LiCl (11 %RH) salt jar and insert the probe.

5. Wait at least 15 minutes for humidity to stabilize. Stabilization may take a

much longer time if there are temperature differences or the salt solution is

freshly made.

6. Start a terminal application on the computer and open a new terminal

session to the transmitter. For more information, see Terminal Application

Settings on page23.

7. Give the errs and send commands to check that there are no active errors,

and that the measurement is working:

errs

0000h

No errors

send

T= 23.1 'C RH= 11.5 %RH Td= -7.3 'C Tw= 9.9 'C h= 28.5

kJ/kg

8. Give the l command to view the currently active user adjustment

parameters.

Example:default values of the user adjustment parameters (no user

adjustment done).

Cp offset : 0.00000000E+00

Cp gain : 1.00000000E+00

T offset : 0.00000000E+00

T gain : 1.00000000E+00

9. Give the crhcommand to start the calibration and adjustment sequence.

The transmitter shows the measured RH value and prompts you to enter the

real humidity of the first reference point.

crh

RH : 11.5378 1. ref ?

5 Maintenance