Measurement Computing Personal Daq rev.6.0 Quick Start - Manual (Page 7)

Personal Daq Quick Start 878495 p/n 491-0940, Rev 6.0 5
Connecting Thermocouple Wires
In Personal Daq applications, thermocouples should not be connected single-ended. Doing
so can result in noise and false readings. This is especially true when acquiring other high-
amplitude signals in conjunction with thermocouple signals that are connected single-
ended.
Thermocouple wires are to be connected in differential mode only.
Differential connection is made as follows:
(a) the red wire connects to the channel’s Low (L) connector.
(b) the second [color-coded] wire connects to the channel’s High (H) connector.
The section entitled Signal Modes in chapter 5 of the user’s manual contains additional information.
V
V
1
2
V
3
V
3+
V
3-
COM
V1 and V2 are
Single-Ended
Inputs
Personal Daq Terminal Block (Partial)
V3 is a Thermocouple
and is a Differential Input
L H
C
O
M H L
1 1 2 2
Single-Ended and Differential Connections to Analog Input Channels
(3) Start Personal DaqView
From Windows, open Personal DaqView by double clicking on its icon, or use the Windows Desktop Start
menu to access the program. You will find Personal DaqView listed in the desktop’s Program group.
Once the program is executed, the software identifies your Personal Daq device and brings up the Main
Control Window. This window is discussed briefly in the following text, and in more detail in chapter 4 of
the Personal Daq User’s Manual included on the installation CD.