User`s guide

Chapter 6 ____________________________________ Field Calibration Check of Fixed Transmitters
CHAPTER 6
FIELD CALIBRATION CHECK OF FIXED
TRANSMITTERS
To compare measurement readings or to read the output of a fixed
transmitter directly on the DM70 display, connect DM70 to a fixed
Vaisala transmitter using the connection cable accessories.
Vaisala DRYCAP
®
Dewpoint and Temperature Transmitter Series
DMT340 can be adjusted in laboratory conditions using DM70 as a
reference. Please refer to Chapter 9, Calibration, Adjustment, and
Maintenance on page 65 for more information.
Field Calibration Check of
DMT340/DMT242/DMT142
You can use DM70 to display the reading of DMT340, DMT242 or
DMT142 and to compare the readings of DM70 and
DMT340/DMT242/DMT142.
To connect DMT340 you need connection cable 211339. For
DMT242, you will need the 27160ZZ cable and for DMT142, you
will need the 211917ZZ cable (see section Accessories on page 89).
For field calibration check, follow the instructions below.
1. Turn off DM70.
2. Connect the cable between DMT340 (service port) or
DMT242/DMT142 (serial port) and DM70 (connector I or II).
Turn on both the devices.
VAISALA _______________________________________________________________________ 43