MercuryiTC
©2014 Oxford Instruments Omicron NanoScience. All rights reserved.
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2.2 Display and touch-screen
The MercuryiTC contains a 4.3 inch full-colour liquid crystal display (LCD) with a touch-screen.
The touch screen is the main input device to the iTC.
The front panel is also fitted with an ambient-light sensor. The iTC can be configured to change
the display brightness automatically to match ambient light conditions.
2.3 Electrical power supply
The MercuryiTC automatically configures itself to match the supplied electrical power, as long
as the voltage and frequency are within the specified ranges. No user intervention is required.
The iTC powers all sensors, heaters, and stepper motors that are connected to it.
Details of supply parameters are listed in section 17.2.
2.4 Temperature sensor circuits
The MercuryiTC can use a wide variety of temperature sensors. A high-accuracy measurement
circuit amplifies, scales and filters the voltage produced by the sensor. This conditioned voltage
is then passed to a 24-bit analogue to digital converter (ADC).
Some sensors (e.g. resistance sensors) require excitation. For positive temperature coefficient
sensors, this is generated by a high-stability current source. For negative temperature
coefficient sensors, this is provided by a true voltage source.
The basic iTC can monitor one temperature sensor. Additional sensors can be monitored by
adding daughter boards.
2.5 Heater circuits
The demand voltage for the heater is generated by a 16-bit digital to analogue converter (DAC).
This demand is then amplified to a maximum of 80 W output.
The basic iTC can drive one heater. Up to three additional heaters can be driven by adding
daughter boards.
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