Newport 6000 - Page 8

iv
5.2 TEC Safety Features________________________________________________ 53
5.2.1 Conditions Which Will Automatically Shut Off the TEC Output _________________ 53
5.3 The TEC Connectors________________________________________________ 53
5.3.1 TEC Grounding Consideration ___________________________________________ 54
5.4 TEC Module Operation _____________________________________________ 54
5.4.1 Quick Start___________________________________________________________ 54
5.4.2 TEC Main Screen______________________________________________________ 54
5.4.3 TEC Setup Screen _____________________________________________________ 55
5.4.3.1 Sensor ____________________________________________________________ 56
5.4.3.2 Mode _____________________________________________________________ 56
5.4.3.2.1 Constant Temperature Mode (Const T) _______________________________ 56
5.4.3.2.2 Constant Resistance/Reference Mode (Const R/Const v/Const i)____________ 56
5.4.3.2.3 Constant Current Mode (Const I
TE
) __________________________________ 57
5.4.3.2.4 Effects of Calibration on TEC modes _________________________________ 57
5.4.3.3 Gain ______________________________________________________________ 57
5.4.3.4 Limits_____________________________________________________________ 58
5.4.3.4.1 TE Current Limit (Limit I
TE
) _______________________________________ 58
5.4.3.4.2 Temperature Limits (Limit T
HI
and Limit T
LO
) _________________________ 58
5.4.3.4.3 Resistance/Reference Limits (Limit R
HI
/v
HI
/i
HI
and Limit R
LO
/v
LO
/i
LO
)______ 58
5.4.3.5 Tolerances (Tol Time and Tol Temp) ____________________________________ 58
5.4.3.6 C1, C2, C3, and Ro __________________________________________________ 59
5.4.3.7 The 

 and Soft Keys ______________________________________________ 59
5.4.4 Link Conditions _______________________________________________________ 59
5.4.4.1 Thermistor and Thermistor Current Selection ______________________________ 60
5.4.4.1.1 Introduction_____________________________________________________ 60
5.4.4.1.2 Thermistor Range ________________________________________________ 60
5.4.4.1.3 Temperature Resolution ___________________________________________ 61
5.4.4.1.4 Selecting Thermistor Current _______________________________________ 62
5.4.4.1.5 Selecting Thermistors _____________________________________________ 62
5.4.4.1.6 The Steinhart-Hart Equation ________________________________________ 63
5.4.4.1.7 Table of Constants _______________________________________________ 65
5.4.4.2 AD590 and LM335 __________________________________________________ 66
5.4.4.2.1 General ________________________________________________________ 66
5.4.4.2.2 AD590 Sensor___________________________________________________ 66
5.4.4.2.3 LM335 Sensor___________________________________________________ 67
5.4.4.2.4 Determining C1 and C2 for the AD590 and LM335______________________ 68
5.4.4.3 RTD Sensors _______________________________________________________ 69
5.4.4.3.1 RTD Constants __________________________________________________ 70
6. Maintenance__________________________________________________71
6.1 Introduction_______________________________________________________ 71
6.2 Fuse Replacement __________________________________________________ 71
6.3 Cleaning __________________________________________________________ 71
7. Calibration ___________________________________________________73