SM3000
Multipoint Videographic Recorder
6 Configuration
IM/SM3000–EN Rev. L
89
6.6.2 Analog Input Configuration
Note.
The 'Analog I/P' tab is displayed only if 'Source ID' for the Recording Channel is set to an analog signal source – see
Section 6.6.1, page 87.
If an analog input is assigned to more than one recording channel, changes to any of its parameters and tags are applied to
each channel the input is assigned to.
If an analog input is already assigned to another channel, the edit keys (
) are not available.
Select the electrical characteristics of the input.
Note.
Simulated input types are available for evaluating
instrument features without the need for process
connections.
If a standard analog input module is fitted and 'Volt free
digital input' is selected, the input channel becomes a
digital input channel – see Section 6.6.3, page 92.
Select 'Off' to disable an analog input.
Warning.
Ensure that the appropriate electrical connections have
been made – see Section 7.4, page 114.
When 'Type' is set to 'Volts', input signals with voltages
greater than 2 V (standard inputs) or 1 V (high specification
inputs) must be connected through an external voltage
divider (part no. GR2000/0375) – see Section 7.4.1,
page 114.
Input signals with voltages up to 2 V (2000 mV – standard
inputs) or 1 V (1000 mV – high specification inputs) may
be measured without the need for the voltage divider by
setting 'Type' to 'millivolts'.
An external 10
shunt resistor is required for current
ranges – see Section 7.4.1, page 114.
Select the linearizer type and the units used to condition the
input signal before it is sampled.
Note.
For thermocouple applications using an external fixed cold
junction, set 'Type' to 'millivolts' and select the appropriate
linearizer type.
Linearizer units are displayed only if a temperature
linearizer type (Thermocouple or RTD) is selected.