West Control Solutions DataVU 7 - Manual (Page 105)

105
13 Configuration - Analog Inputs
The analog inputs of the recorder are configured in this menu. How to connect
the inputs to the recorder is described in the Installation Instructions 59488
(connectors 8 to 13, depending on the equipment level of the individual
module slots).
13.1 Sensor … Offset
Overview
Sensor Type of the connected sensor (e.g. RTD in 3-wire circuit). The setting
“Inactive” means that the channel is not connected.
Linearization In addition to the usual linearizations (e.g. Pt100), four customer-specific
linearizations are available. The associated linearization tables have to be
created using the setup program.
Reference
junction
(cold junction) The settings for the cold junction are only available if “thermocouple” has been
selected as the sensor.
Ext. reference
temperature The cold-junction temperature is entered here if “thermocouple” has been
configured as the sensor and “Ext. const.” as the cold junction.
Measure.
range start/
range end The limits for the range are determined by the sensor type that has been
connected and automatically entered. The start and end can be altered for
these sensor types: current, voltage, potentiometer and resistance transmitter.
H
An analog channel can be used in a group, even though its sensor
is set to “Inactive”. The channel is marked as invalid “-----” in the
curve presentation.
Internal Pt100 The Pt100 resistance thermometers within the
instrument are used for the comparison measurement.
Ext. const. A constant temperature is selected for comparison.