4
Saab TankRadar L/2
US Version. Seventh edition, June 1995
Installation Manual
7
Description of the Junction Boxes ................................................. 28
7.1
Junction Box JB 8 for Connection of RTG to Slave DAU ............. 28
7.2
Junction Box JB 12 for Connection of RTG (with CLC) to
Slave DAU ......................................................................................... 28
7.3
Junction Box JB 16 for Connection to RTG and Independent DAU
29
7.4
Junction Box JB 36 for Connection of Temperature Sensors ....... 29
8
Connection to a Plant Host Computer (Plant DCS) .................. 29
8.1
Connect to the FCU for Quick Updates ........................................ 30
8.2
Connect to OPI/2 for Inventory Data ............................................ 30
9
Installation Schedule ...................................................................... 30
10
Requirements on the installation of the Radar Tank Gauges ..... 31
10.1
Requirements for the Horn Antenna Gauge, RTG 2920 .............. 32
10.1.1
Free Space Requirement ............................................................ 32
10.1.2
Socket Requirement.................................................................... 33
10.2
Requirements for Parabolic Antenna Gauge, RTG 2930.............. 34
10.2.1
Inclination of the Parabolic Antenna Gauge........................... 34
10.2.2
Free Space Requirement ............................................................ 35
10.2.3
Flange Requirements ................................................................. 36
10.2.4
New Tanks ................................................................................... 36
10.2.5
Socket Requirements .................................................................. 37
10.3
Requirements for the Still Pipe Gauge, RTG 2940 ....................... 38
10.3.1
Still Pipe Requirements.............................................................. 38
10.3.2
Flange Requirements ................................................................. 38
10.3.3
New Tanks ................................................................................... 39
10.3.3
Service Space ............................................................................... 39
10.4
Requirements for the LPG/LNG Gauge, RTG 2960 ..................... 40
10.4.1
Temperature and Pressure Measurement ............................... 40
10.4.2
Still Pipe ....................................................................................... 40
10.4.3
References in Still Pipe ............................................................... 40
10.4.4
System with Reference Pin and Reflector Plug ...................... 41
10.4.5
System with Reference Pins Only ............................................ 41
10.4.6
Extension Pipe for Minimum Distance ................................... 41
11
Mechanical Installation of the Radar Tank Gauges ...................... 42
11.1
Installation of Horn Antenna Gauge, RTG 2920 ........................... 42
11.2
Installation of the Parabolic Antenna Gauge, RTG 2930 ............. 44
11.3
Installation of the Still Pipe Gauge, RTG 2940 .............................. 47
11.4
Installation of the LPG/LNG Gauge, RTG 2960 ............................ 50
12
Electrical Installation ...................................................................... 53
12.1
Cabling for Power Supply ................................................................ 53
12.2
Cabling for TRL/2 Bus ...................................................................... 54
12.3
Grounding ......................................................................................... 54
12.4
Electrical Installation of the Radar Tank Gauge, RTG .................. 54
12.4.1
The Non-Intrinsically Safe Connection (W11) ........................ 54
12.4.2
The Intrinsically Safe Connection (W12) ................................. 54
