viii
7.6 PID Tuning ................................................................................. 55
7.6.1 PID Control Loop .......................................................55
7.6.2 P Loop .............................................................................56
7.6.3 PI Loop ............................................................................56
7.6.4 PID Loop .........................................................................57
7.7 Model 300B Series Setup ........................................................... 58
7.7.1 Rack Mounting Model 300B Series Units.......................58
7.7.2 Model 300B Series Operating Checklist .........................58
8Maintenance and Service 61
8.1 Enclosure Cleaning..................................................................... 61
8.2 Fuse Replacement....................................................................... 61
8.3 Obtaining Service ....................................................................... 62
8.4 Service Form .............................................................................. 63
List of Figures
Figure 1 CSA mark with “C” and “US” Indicators ................................ 11
Figure 2 CE Mark................................................................................... 11
Figure 3 Alternating Voltage Symbol .................................................... 11
Figure 4 On Symbol ............................................................................... 12
Figure 5 Off Symbol............................................................................... 12
Figure 6 Fuse Symbol............................................................................. 12
Figure 7 Frame or Chassis Terminal Symbol......................................... 12
Figure 8 Protective Conductor Terminal ................................................ 13
Figure 9 AC Receptacle Warning Label................................................. 14
Figure 10 Locations of warnings on the rear panel .................................. 16
Figure 11 Front Panel Layout (325B shown) ........................................... 25
Figure 12 Rear Panel ................................................................................ 28
Figure 13 Application front panel (TEC Tab) .......................................... 45
Figure 14 Application front panel when communicating (LDD Tab)...... 46
Figure 15 Thermistor Resistance versus Temperature ............................. 51
Figure 16 TE Module Configuration........................................................ 53
Figure 17 Mounting arrangement of a TE module, heat sink and laser
diode......................................................................................... 54
Figure 18 Basic block diagram of a temperature control system ............. 55
Figure 19 Proportional Temperature Controller Block Diagram ............. 56
Figure 20 PI Temperature Controller Block Diagram.............................. 57
Figure 21 PID Temperature Controller Block Diagram........................... 57
Figure 22 Fuse Replacement .................................................................... 61
