Assessments - 4, GPA: 4
(
)
)
|
Facilidade de uso
1.5 Model 3081FG September 2002 d. Installing Model 3081 Transmitter surface using the threaded mounting holes located on the bottom of (2) 2 1. Ensure all components are available to the transmitter housing. Refer to install the Model 3081 Transmitter. Figure 2-6 for installation references. 2. Choose a method or location to mount the transmitter. (b) Pipe Mounting. An optional pipe mounting bracket is available for (a) Flat Surface Mounting. The trans- this type of installation. Refer to mitter may be mounted on a flat Figure 2-7 for installation references. TERMINAL BLOCK (TB) TERMINAL END CAP OMITTED FOR CLARITY (THIS VIEW) 1/4-20 THREADS (4 PLACES) SURFACE BY OTHERS NOTE: DIMENSIONS ARE IN INCHES WITH MILLIMETERS IN PARENTHESES. 0.839 (21.31) 0.839 (21.31) 6.35 (161.3) CIRCUIT END 6.32 (160.5) 1.32 (33.5) 3.68 (93.5) TERMINAL END O-RING (2 PLACES) 3/4-14 NPT (2 PLACES) THREADED CAP (2 PLACES) COVER LOCK FLAT SURFACE MOUNTING PAD HOLE PATTERN 26020003 Figure 2-6. Flat Surface Mounting Dimensional Information Rosemount Analytical Inc. A Division of Emerson Process Management Installation 2-7 Instruction Manual IB-106-3081 Rev. 1.5 September 2002 Model 3081FG COVER LOCK TERMINAL END 3/4 -14 NPT 2 PLACES CIRCUIT END 1.32 (33.5) 1.00 (25.4) TERMINAL BLOCK (TB) TERMINAL END CAP OMITTED FOR CLARITY IN THIS VIEW. 2 IN. PIPE/WALL MOUNTING BRACKET (OPTION) U-BOLT (2 PLACES) 4.00 (101.6) 6.9 (175.3) 6.35 (161.3) 9.63 (244.6) 6.32 (160.5) 7.5 (190.5) 3.87 (98.3) 0.375 (9.525) DIA. C C L L BRACKET HOLE PATTERN FOR WALL MOUNTING (4 MOUNTING HOLES) 3.25 (82.55) 6.5 (165.1) 1.405 (35.687) 2.81 (71.374) 3/4-14 FNPT (2 PLACES) 5/16-18 NUT 5/16 WASHER NOTE: DIMENSIONS ARE IN INCHES WITH MILLIMETERS IN PARENTHESES. *SCREWS FURNISHED WITH MOUNTING KIT ONLY. NOT FURNISHED WITH ANALYZER/TRANSMITTER. % mAmAU-BOLT 1/4-20 SCREW* 26020042 1/4-20 THREADS BOTTOM VIEW Figure 2-7. Pipe Mounting Dimensional Information 2-8 Installation Rosemount Analytical Inc. A Division of Emerson Process Management Instruction Manual IB-106-3081 Rev. 1.5 Model 3081FG September 2002 3. For correct viewing orientation, the dis- (f) Install the circuit end cap and play may be changed 90 degrees, us-tighten the cover lock screw to se( 2) 2 ing the following procedure: cure the cover lock in place. (a) Refer to Figure 2-8. Loosen the 2-3 ELECTRICAL INSTALLATION cover lock screw until the cover All wiring must conform to local and national lock is disengaged from the codes. knurled surface on the threaded circuit end cap. (b) Remove the circuit end cap. (c) Remove the three screws retaining the display board in place. (d) Lift and rotate the display board 90 degrees either way. (e) Reposition the display board on the standoffs. Install and tighten all three screws. For intrinsically safe applications, refer to drawing 1400184, page 10-2 of this Instruction Bulletin. Disconnect and lock out power beforeconnecting the unit to the power supply. Install all protective equipment coversand safety ground leads after installation. Failure to install covers and ground leads could result in serious injury or death. To meet the Safety Requirements ofIEC 1010 (EC requirement), and ensuresafe operation of this equipment, connection to the main electrical powersupply must be made through a circuitbreaker (min 10 A) which will disconnect all current-carrying conductorsduring a fault situation. This circuitbreaker should also include a mechanically operated isolating switch. Ifnot, then another external means of disconnecting the supply from theequipment should be located close by. Circuit breakers or switches must comply with a recognized standard such as IEC 947. SCREW DISPLAY BOARD 90O 90O CIRCUIT END CAP HOUSING a. General The power supply and signal wiring should be shielded. Also, make sure the signal 26020061 wiring is grounded at the Model 3081 Transmitter end only. Do not ground the Figure 2-8. Display Positioning Assembly signal loop at more than one point. Twisted Rosemount Analytical Inc. A Division of Emerson Process Management Installation 2-9 Instruction Manual IB-106-3081 Rev. 1.5 September 2002 Model 3081FG pairs are recommended. Ground the transmitter housing to an earth ground to prevent unwanted electromagnetic interference (EMI) or radio frequency interference (RFI). NOTE For optimum EMI/RFI immunity, shieldthe 4-20 mA current loop cable andenclose in an earth grounded metalconduit. NOTE Never run signal or sensor wiring inthe same conduit, or open tray, withpower cables. Keep signal or sensorwiring at least 12 in. (0.3 m) away fromother electrical equipment and 6.5 ft (2m) from heavy electrical equipment. It is necessary to prevent moisture from entering the Model 3081 Transmitter housing. The use of weather-tight cable glands is required. If conduit is used, plug and seal connections on the transmitter housing to prevent moisture accumulation in the terminal side of the housing. Moisture accumulation in the transmitter housing can affect its perf...