Vaisala DMT242 - Manual (Page 3)

Vaisala DRYCAP ® Dewpoint Transmitter DMT242
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June 2008 | M010036EN-D
SCALING THE ANALOG OUTPUT VIA THE SERIAL BUS
Serial communication settings
The analog output scaling can be done using the serial bus and computer with suitable terminal software.
Connect the DMT242 to a serial bus via the RS-232 interface by using the following settings: Baud rate:
2400, Parity: none, Data bits: 8, Stop bits: 1. The serial cable (DMT242RS) can be ordered from Vaisala.
Scaling of the dewpoint output
Scale the dewpoint parameter by giving the command ascl xx yy<ENTER> where xx = the low limit
(
C or ºF) and yy = the high limit (C or ºF). The factory setting for serial measurement unit is
Centigrade ( C). To change the unit for Fahrenheit (ºF) use command unit xx <ENTER> where xx = n
for non-metric (ºF) and xx = m for metric ( C) units.
ACCESSORIES
Order Code Description
HM47280 Stainless steel sintered filter
DMT242RS RS-232 serial line cable for PC (with female D connector)
210662 1/2" NPT adapter
GUARANTEE
Vaisala issues a guarantee for the material and workmanship of this product under normal operating
conditions for one (1) year from the date of delivery. Exceptional operating conditions, damage due to
careless handling and misapplication will void the guarantee.