Handbook
November 2011 / 59-UMC0071 / Issue 01
Mercury iTC
Page 5Original Instructions
4.6.1 Temperature measurement circuit ................................................................................. 69
4.6.1.1 Description of voltage measurement mode................................................................ 69
4.6.1.2 Description of constant current measurement mode.................................................. 70
4.6.1.3 Description of constant voltage measurement mode ................................................. 71
4.6.1.4 Calibrating the temperature measurement circuit ..................................................... 73
4.6.2 Heater circuit .................................................................................................................. 74
4.6.2.1 Description of the heater circuit.................................................................................. 74
4.6.2.2 Calibrating the heater circuit....................................................................................... 75
5 GETTING STARTED .......................................................................................................... 77
5.1 Checking the electrical supply ........................................................................................ 77
5.2 Mounting the equipment .................................................................................................. 77
5.3 Connecting electrical power ............................................................................................ 78
5.3.1 Connecting the heaters and sensors ............................................................................. 78
5.3.2 Connecting the data interfaces ...................................................................................... 78
5.3.2.1 Connecting the ethernet interface (if required)........................................................... 78
5.3.2.2 Connecting the RS232 serial interface (if required) ................................................... 78
5.3.2.3 Connecting ISOBUS (if required) ............................................................................... 78
5.3.2.4 Connecting the GPIB (if required) .............................................................................. 79
5.3.3 Connecting the auxiliary port (if required) ...................................................................... 79
5.3.4 Connecting the level-meter (if required) ......................................................................... 79
5.4 Powering up the unit for the first time ............................................................................ 80
5.4.1 Setting the date and time ............................................................................................... 80
5.4.2 Configuring the inputs ....................................................................................................81
5.4.2.1 Configuring the sensor details.................................................................................... 81
5.4.2.2 Using a generic calibration-file ................................................................................... 81
5.4.3 Configuring a heater ......................................................................................................82
5.4.4 Configuring the heater control loop ................................................................................ 83
5.4.4.1 Configuring manual heater control ............................................................................. 83
5.4.4.2 Configuring automatic heater control ......................................................................... 83
5.4.5 Configuring a gas valve ................................................................................................. 84
5.4.5.1 Configuring manual control of the gas valve .............................................................. 84
5.4.5.2 Configuring automatic control of the gas valve .......................................................... 85
5.5 Testing the inputs and outputs ....................................................................................... 85
5.5.1 Testing the temperature sensor inputs .......................................................................... 85
5.5.2 Testing the heater output ............................................................................................... 85
5.5.3 Configuring remote interfaces ........................................................................................ 85
6 BASIC OPERATING INSTRUCTIONS .............................................................................. 87
6.1 Configuring the LCD display ........................................................................................... 87
6.2 Changing a setpoint .........................................................................................................87
6.2.1 Changing a heater setpoint ............................................................................................ 87
6.2.2 Changing a gas-flow setpoint ......................................................................................... 87
6.3 Using the sweep function ................................................................................................ 87
6.3.1 The purpose of the sweep function ................................................................................ 87
6.3.2 Programming a sweep ................................................................................................... 88
6.3.3 Loading a sweep ............................................................................................................ 88
6.3.4 Starting a sweep ............................................................................................................ 88
6.3.5 Stopping a sweep ..........................................................................................................89
6.4 Using the plot function .....................................................................................................89
6.4.1 Configuring a plot ........................................................................................................... 89
6.4.2 To remove a trace from the plot ..................................................................................... 90
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