Vaisala HMP60 Betriebsanweisung PDF herunterladen (Seite 54)

User's Guide ______________________________________________________________________

52 __________________________________________________________________ M211060EN-C

One-Point Adjustment of T Measurement

(HMP110 and HMP110T)

To perform a one-point adjustment to the temperature measurement of

the HMP110 or HMP110T you need:

- The Vaisala USB cable (Vaisala order code: 219690)

- PC with a terminal application.

- One known and stable temperature reference.

1. Connect the USB cable to the PC, but do not connect it to the probe

yet.

2. Insert the probe in the temperature reference.

3. Start a terminal application and set the correct connection settings.

The default serial settings are 19200 8 N 1. Remember to check

which COM port the USB cable is using.

4. Wait for 20 – 40 minutes for the temperature to stabilize.

5. Start the terminal session and connect the USB cable to the probe.

If your probe is in the analog output mode, you need to press Enter

a few times to start it in RS-485 mode.

6. Verify that the connection works by giving the ? command:

If the probe does not respond with device information:

- Disconnect the USB cable from the probe and retry. If your

probe is in the analog output mode, press Enter a few times

immediately after connecting the USB cable.

- Try the ?? command in case the probe is in POLL mode, open

the line using OPEN command if necessary.

- Check your serial line settings and cable connections.

7. When your serial connection is working, use the L command to see

the current user adjustment parameters.

8. Use the ERRS command to see that no errors are active:

errs

9. Give the CT command, with the temperature value of the reference

as a parameter:

ct 23.5

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Vaisala HMP60 Betriebsanweisung Seite 54