Peekel Instruments User manual PICAS V2.6.1
Page 51 of 59
3.7.1 CA4AI menu: GENERAL
Controls and Functions
Excitation selectable 5 V or 1 mA
Meas. Type: selectable Voltage: 20mV – 10V
Current: 5mA – 50 mA
Resistor: 100 - 7500Ω
PT100
PT1000
CJC (Only selectable on channel 1)
On channel 2,3 and 4 of each card the
following thermocouples can be selected:
Type B,E,J,K,N,R,S and T
Presentation selectable (default / Signal V/V / Physical unit)
Functional Description
In this menu the general settings for the channel are made. At first a choice must be made
for the sensor excitation to be Voltage of Current.
The next selection is the type of measurement to be done. In this menu only the type is
selected. The range selection is made in the Range menu.
Thermocouple measurement.
This is a special case measurement, because 2 temperatures has to be measured. First of
course the signal on the terminals of the CA4AI card. Somewhere in the connection of the
thermocouple a junction is present. The temperature of this point must be known to
determine the correct temperature measured by the thermocouple. This extra measurement
must be done with channel 1. The selected type must be CJC, and a PT100 must be
connected to the input of channel 1. This PT100 must be placed near the junction of the
thermocouple connection.
A special item is available to measure the temperature of the terminal of channel 1.
Due to this, no more then 3 thermocouple signal can be measured on each CA4AI card.
Device 1
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