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4 ISD Operability Test Procedure Vapor Pressure Sensor Ambient Reference Test <br /> — — — — — — — — — — — — — — — <br /> Base of dispenser cabinet <br /> ISD <br /> Pressure <br /> Sensor <br /> I I <br /> Io-- __ _ __ _- <br /> I ____ �____ ___= '===T <br /> - <br /> -- <br /> ----- ----------- -------- <br /> I I <br /> I I <br /> I I <br /> I I <br /> I I <br /> I I <br /> Ambient <br /> reference I I <br /> port cap <br /> o I <br /> I I <br /> I <br /> Normal <br /> valve I I <br /> position <br /> o I <br /> I I <br /> I <br /> I I <br /> I I <br /> — — — — — — — — — — — — — — — — — j <br /> Atmospheric <br /> valve position <br /> Figure 4-1. Vapor pressure sensor valve positions <br /> STEP 1 M �–► ' " <br /> r t � <9_ z <br /> 4f <br /> STEP F �–► <br /> L(Sent leheQ —►Q dspta oto pea b L�AroA t. <br /> STEP 3 S carr BAU PRESSQBINr> T <br /> x=sensor nether �� P�iat �: <br /> S <br /> S1:IRDS N"STEP 4 S CBNSIAMPRESS-?RINP <br /> erearNlr4.n� <br /> STEP 5 S S4:VUS NMI �pr..Y dtWt.* <br /> CRANNELS PRESS 4rND <br /> STEP 7 STEP 8 <br /> STEP 6 S CALIBRATE UUMUNSBR —' S4:TRPS Nal ® P,�0M t�,A a fir„per_ . <br /> PRESSED PRESSBRE:XM <br /> Pn a updates autama9raF/ Q DO NOT PRESS -1 M""is <br /> m Del <br /> Figure 4-2. Accessing Calibrate SmartSensor diagnostic menu <br /> 4-2 <br />