valutazioni - 4, GPA: 3.5
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Use CLOS (@ccnn) and OPEN (@ccnn), where cc = switch card number (01-99, leading zero not necessary) nn = channel number (00-15) 24 Verification Tests Chapter 2 Example: Closed-Channel Resistance Test This example performs the Closed-Channel Resistance Test for all Normally Open and Normally Closed contacts. 10 ! RE-STORE "CONTACT_RES" 20 ASSIGN @Switch TO 70915 30 ASSIGN @Dmm TO 722 40 ! 50 OUTPUT @Switch;"*RST" !Open all NO contacts 60 OUTPUT @Dmm;"PRESET NORM;TRIG HOLD" 70 OUTPUT @Dmm;"FUNC OHMF" 80 ! 90 !---------------NORMALLY OPEN CONTACTS--------------- 100 DISP "Connect DMM to NO and C lines of E1364A (4-wire connection)" 110 PAUSE 120 DISP 130 PRINT "Contact Resistance -- Normally Open Contacts" 140 PRINT 150 ! 160 FOR I=0 TO 15 170 !Closed-channel resistance (NO contacts) 180 OUTPUT @Switch;"CLOS (@"&VAL$(100+I)&")" 190 OUTPUT @Dmm;"TRIG SGL" 200 ENTER @Dmm;Rdg 210 PRINT "Channel "&VAL$(I)&" (closed): "&VAL$(Rdg) 220 ! 230 !Open-channel resistance (NO contacts) 240 OUTPUT @Switch;"OPEN (@"&VAL$(100+I)&")" 250 OUTPUT @Dmm;"TRIG SGL" 260 ENTER @Dmm;Rdg 270 PRINT "Channel "&VAL$(I)&" (open): "&VAL$(Rdg) 280 PRINT 290 NEXT I 300 ! 310 !---------------NORMALLY CLOSED CONTACTS--------------- 320 DISP "Connect DMM to NC and C lines of E1364A (4-wire connection)" 330 PAUSE 340 DISP 350 PRINT "Contact Resistance -- Normally Closed Contacts" 360 PRINT 370 ! Continued on Next Page ___/ Chapter 2 Verification Iests 2б f N 380 OUTPUT @Switch;"CLOS (@100:115)" ¡Open allNC contacts 390 FOR I=0 TO 15 400 !Closed-channel resistance (NC contacts) 410 OUTPUT @Switch;"OPEN (@"&VAL$(100+I)&")" 420 OUTPUT @Dmm;"TRIG SGL" 430 ENTER @Dmm;Rdg 440 PRINT "Channel "&VAL$(I)&" (closed): "&VAL$(Rdg) 450 ! 460 !Open-channel resistance (NC contacts) 470 OUTPUT @Switch;"CLOS (@"&VAL$(100+I)&")" 480 OUTPUT @Dmm;"TRIG SGL" 490 ENTER @Dmm;Rdg 500 PRINT "Channel "&VAL$(I)&" (open): "&VAL$(Rdg) 510 PRINT 520 NEXT I 530 ! 540 END \_/ 26 Verification Tests Chapter 2 Test 2-2: DC Isolation Test This test verifies that sufficient DC isolation exists between various points on the switch module. The DMM used should be capable of measuring up to at least 1 GO. If the DMM indicates an overload, record the reading as ">Rmax", where Rmax is the highest resistance that the DMM can measure. If the DMM is a 3458A, for example, the reading should be written as ">1.2 GO". Normally Open to Common 1. Hardware Connections HP E1300A / E1301A HP 3458A Digital Multimeter Q Sense Input H|® ©+H- L°© © o HP E1364A NO _/ NC Figure 2-4. DC Isolation Test (NO Channels to Common) 2. Equipment Setup • Set DMM to: 2-wire ohms, 1 GO range. • Send *RST to the switch to open all NO contacts. 3. DC Isolation Reading • Trigger the DMM and record the reading. Chapter 2 Verification Tests 27 Normally Closed to Common 1. Hardware Connections HP E1300A / E1301A Figure 2-5. DC Isolation Test (NC Channels to Common) 2. Equipment Setup • Set DMM to: 2-wire ohms, 1 GO range. • Send *RST to the switch. • Send the CLOS (@100:115) command to the switch to open all NC contacts. 3. DC Isolation Reading • Trigger the DMM and record the reading. 28 Verification Tests Chapter 2 Normally Open to Chassis 1. Hardware Connections HP E1300A / E1301A Figure 2-6. DC Isolation Test (NO Channels to Chassis) 2. Equipment Setup • Set DMM to: 2-wire ohms, 1 GO range. • Send *RST to the switch. • Send the CLOS (@100:115) command to the switch to close all NO contacts. 3. DC Isolation Reading • Trigger the DMM and record the reading. Chapter 2 Verification Tests 29 Normally Closed to Chassis 1. Hardware Connections HP E1300A / E1301A Figure 2-7. DC Isolation Test (NC Channels to Chassis) 2. Equipment Setup • Set DMM to: 2-wire ohms, 1 GO range. • Send *RST to the switch to close all NC contacts. 3. DC Isolation Reading • Trigger the DMM and record the reading. 30 Verification Tests Chapter 2 Example: DC Isolation Test This example performs the DC Isolation Test for Normally Open and Normally Closed channels to both Common and chassis (earth ground). 10 IRE-STORE "DC_ISOL" ^ 20 ASSIGN @Switch TO 70915 30 ASSIGN @Dmm TO 722 40 I 50 OUTPUT @Dmm;"PRESET NORM;TRIG HOLD" 60 OUTPUT @Dmm;"FUNC OHM;RANGE 1E9" 70 I 80 |---------------NORMALLY OPEN TO COMMON--------------- 90 DISP "Connect DMM HI and LO to E1364A NO and C lines" 100 PAUSE 110 DISP 120 I 130 OUTPUT @Switch;"*RST" lOpen all NO contacts 140 WAIT 1 150 OUTPUT @Dmm;"TRIG SGL" 160 ENTER @Dmm;Rdg 170 I 180 PRINT "DC Isolation -- Normally Open Channels to Common" 190 PRINT "R = "&VAL$(Rdg) 200 PRINT 210 I 220 I---------------NORMALLY CLOSED TO COMMON--------------- 230 DISP "Connect DMM HI and LO to E1364A NC and C lines" 240 PAUSE 250 DISP 260 I 270 OUTPUT @Switch;"CLOS (@100:115)" IOpen all NC contacts 280 WAIT 1 290 OUTPUT @Dmm;"TRIG SGL" 300 ENTER @Dmm;Rdg 310 I 320 PRINT "DC Isolation -- No...
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