Agilent Technologies U1401B, Руководство пользователя и сервисное руководство, Страница: 20 / 181

XX U1401B User’s and Service Guide
Figures
Figure 4-4. Setting the beeper frequency 73
Figure 4-5. Setting the minimum frequency 74
Figure 4-6. Setting the percentage scale readout 75
Figure 4-7. Setting the print mode for remote control 76
Figure 4-8. Setting the echo mode for remote control 77
Figure 4-9. Setting the data bit for remote control 78
Figure 4-10. Setting the parity check for remote control 79
Figure 4-11. Setting the baud rate for remote control 80
Figure 4-12. Setting the display backlight timer 81
Figure 4-13. Setting the auto power-off mode 83
Figure 5-1. Testing a 4 mA to 20 mA current loop with the source
mode 87
Figure 5-2. mA output simulation 89
Figure 5-3. Use the yellow test lead to perform the 2-wire
transmitter simulation 91
Figure 5-4. Pressure transducer measurement 93
Figure 5-5. Zener diode test 95
Figure 5-6. Diode test 97
Figure 5-7. TO-92 Transistor 98
Figure 5-8. TO-3 Transistor 101
Figure 5-9. Determining transistor h
fe 103
Figure 5-10. TO-92 JFET 104
Figure 5-11. N- Channel JFET 106
Figure 5-12. P- Channel JFET 107
Figure 5-13. Current-to-voltage converter 109
Figure 5-14. Voltage-to-current converter 111
Figure 5-15. Square wave to triangular wave conversion 112
Figure 5-16. Verifying a two-wire transmitter 114
Figure 5-17. Verifying a frequency transmitter 116
Figure 6-1. Battery replacement 120
Figure 6-2. Recharging the batteries 122
Figure 6-3. Fuse replacement 124