SECTION 23: MAKING CONNECTIONS ............................................................................................................. 95
23.1 FIELD AND POWER CONNECTIONS (REAR) ................................................................................................. 95
23.2 INPUT POWER .................................................................................................................................... 95
23.2.1 EARTHING REQUIREMENTS ............................................................................................ 95
23.3 SHIELDED (SCREENED) CABLES ..................................................................................................... 96
SECTION 24: FIELD CONNECTIONS ................................................................................................................. 97
24.1 CABLE SCREENS & DRAIN WIRES .................................................................................................... 97
24.2 PLUG NO’S 1, 2, 3 & 4 .......................................................................................................................... 97
24.2.1 RELAY OUTPUTS (4 OFF) ................................................................................................. 97
24.3 PLUG NO. 5.......................................................................................................................................... 98
24.3.1 RS422 & RS485 TERMINOLOGY ....................................................................................... 98
24.3.2 RS422 & RS485 TERMINATION ........................................................................................ 99
24.3.3 RS422 & RS485 CONNECTIONS ....................................................................................... 99
24.4 PLUG NO. 6.......................................................................................................................................... 99
24.4.1 24V DC POWER (1 OFF) .................................................................................................. 100
24.4.2 DUAL FUNCTION DIGITAL INPUTS/OUTPUTS (4 OFF) ................................................. 100
24.4.3 VOLTAGE OR CURRENT PULSE INPUTS (2 OFF) ........................................................ 100
24.4.4 4-20mA ANALOGUE OUTPUT (2 off) ............................................................................... 101
24.4.5 4-20mA ANALOGUE INPUT (3 off) ................................................................................... 101
SECTION 25: INSTRUMENT SPECIFICATIONS ............................................................................................... 102
25.1 GENERAL SPECIFICATIONS............................................................................................................ 102
25.2 INSULATION CO-ORDINATION ........................................................................................................ 103
25.2.1 AC POWER INLET CREEPAGE/CLEARANCE ................................................................ 103
25.2.2 RELAY OUTPUTS CREEPAGE/CLEARANCE ................................................................. 103
25.3 COMPLIANCE TO INTERNATIONAL STANDARDS .......................................................................... 103
SECTION 26: INSTRUMENT BREAKDOWN ..................................................................................................... 104
26.1 DISASSEMBLY .................................................................................................................................. 104
26.2 REASSEMBLY ................................................................................................................................... 104
SECTION 27: PRINTED CIRCUIT BOARDS ..................................................................................................... 105
27.1 FITTING & REMOVAL ........................................................................................................................ 105
27.1.1 MAIN CASE/EXTRUSION ................................................................................................. 105
27.1.2 FRONT PANEL ................................................................................................................. 105
27.2 PRINTED CIRCUIT BOARD CONFIGURATION ................................................................................ 106
27.2.1 PCB HANDLING PRECAUTIONS ..................................................................................... 106
27.2.2 PCB IDENTIFICATION & DESCRIPTION ......................................................................... 106
27.3 F3174 CONFIGURATION .................................................................................................................. 107
27.3.1 BATTERY REPLACEMENT .............................................................................................. 107
27.4 F3175 CONFIGURATION .................................................................................................................. 108
27.4.1 SWITCH SETTINGS FOR ‘SW1’....................................................................................... 108
27.4.2 TRIGGER THRESHOLD ADJUSTMENT .......................................................................... 108
27.5 F3176 CONFIGURATION .................................................................................................................. 109
27.5.1 DISPLAY CONTRAST ADJUSTMENT .............................................................................. 109
SECTION 28: FREQUENTLY ASKED QUESTIONS ......................................................................................... 111
28.1 BATTERY STORAGE LIFE ................................................................................................................ 111
28.2 DATA RETENTION TIME ................................................................................................................... 111
28.3 LCD BACKLIGHT LIFE EXPECTANCY .............................................................................................. 111
SECTION 29: MAINTENANCE / ENTRETIEN ................................................................................................... 112
29.1 HEALTH AND SAFETY PRECAUTIONS / PRECAUTION SANTE ET SECURITE ............................. 112
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