Vaisala HM70 User Manual

Page 48

User's Guide ______________________________________________________________________

46 __________________________________________________________________ M210297EN-E

HMP240 transmitter with a probe heating: The heating
function is turned off automatically when the connection has
been established in step 10.

HMM210 module with chemical purge function (re-gain) or
with probe heating option: Before calibration activate the re-
gain function by resetting the device. Let stabilize to the ambient
conditions. Turn off the heating; use a calibration jumper
(HMM211) specified in the HMM211's User's Guide (section:
Temperature calibration of dewpoint module) or serial
commands (HMM213). For further information, see User's
Guide of the modules.

Connect the

27159ZZ

-calibration cable to the

connector of the HMP230/HMP240-series transmitter

(

connector = 6-pin connector on the left side of the

motherboard).

- calibration connector of the HMM210 module.

Connect the other end of the calibration cable to either of the
HM70's connector port located on the bottom of the indicator,
see Figure 7 on page 40.

Turn on the HM70.

Open the

MENU:

press

OPEN

Select

Functions

, press

Select

Calibrate transmitters,

press

Select

1.Baud rate

and

2.Serial format.

Press

SET

to change the

serial settings. Serial settings of the transmitter/module and
HM70 shall be the same. HMP230/240 default serial settings:
4800, 7, even 1. HMM210 module's default settings: 1200, 8,
None. Note! HMM213 shall be in RUN or STOP mode.

Select

3.Start calibration

, press

START.

If the serial settings of

HM70 are not compatible with the settings of HMP230, or the
cable connection is not working check that the serial settings of
HMP230 and the settings of HM70 are the same. Check the
cable connection. Then retry connection in step 6.

10. After connection has been established start the adjustment by

pressing

11. Select the quantity to check RH/T (view only), press

SELECT.

12. If RH selected, check the environment settings of HM70 probe,

if needed. Press

YES