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System Description
I/O Components
Analog Voltage Outputs
Analog Current Outputs
(Optional)
Analog Voltage Inputs
(Optional)
8-12
Model 146i Instruction Manual
The instrument provides six analog voltage outputs. Each may be software
configured for any one of the following ranges, while maintaining a
minimum resolution of 12 bits:
•
0-100mV
•
0-1V
•
0-5V
•
0-10V
The user can calibrate each analog output zero and span point through
firmware. At least 5% of full-scale over and under range are also supported.
The analog outputs may be assigned to any measurement or diagnostic
channel with a user-defined range in the units of the selected parameter. The
voltage outputs are independent of the current outputs.
The optional I/O Expansion board includes six isolated current outputs.
These are software configured for any one of the following ranges, while
maintaining a minimum resolution of 11 bits:
•
0-20 mA
•
4-20 mA
The user can calibrate each analog output zero and span point through
firmware. At least 5% of full-scale over and under range are also supported.
The analog outputs may be assigned to any measurement or diagnostic
channel with a user-defined range in the units of the selected parameter. The
current outputs are independent of the voltage outputs. The current outputs
are isolated from the instrument power and ground, but they share a
common return line (Isolated GND).
The optional I/O expansion board includes eight analog voltage inputs.
These inputs are used to gather measurement data from third-party devices
such as meteorological equipment. The user may assign a label, unit, and a
voltage to user-defined unit conversion table (up to 16 points). All voltage
inputs have a resolution of 12 bits over the range of 0 to 10 volts.
Thermo Fisher Scientific
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Troubleshooting
