Ashcroft 4480 - Pneumatic Transmitter Manual de usuario

SERIES 4000 PRESSURETRANSMITTERINSTALLATION AND MAINTENANCEINSTRUCTIONS© 2013 Ashcroft Inc., 250 East Main Street, Stratford, CT 06614-5145, USA, Tel:

10Figure 8. Indicating and Non-Indicating Pressure Transmitter, Series 45-C4080 and Series 45-C4480I&M008-10061-1-01 250-1969-C_I&M008-10061-1

11Figure 9. XMV Variation (Metal Tubing)I&M008-10061-1-01 250-1969-C_I&M008-10061-1/01 250-1969-C 12/20/13 9:09 AM Page 11

12GeneralCalibration of the transmitter Is very similar to calibration of agauge. A coarse zero adjustment corresponds to the setting ofthe pointer on

13Figure 10. Pneumatic Relay, cross-sectional view, order of assembly/dis-assemblyI&M008-10061-1-01 250-1969-C_I&M008-10061-1/01 250-1969-C 1

ITEM NAME OF ASSEMBLY OR PART PART NO. QTY.29 Screw SIFH-93 430 Washer (Lock) SSSS-118 431 Screw (Cover) APF-9907 232 Disc (Safety) AMP-9652 133 Tee 2

15I&M008-10061-1-01 250-1969-C_I&M008-10061-1/01 250-1969-C 12/20/13 9:09 AM Page 15

All specifications are subject to change without notice. All sales subject to standard terms and conditions. © 2013 Ashcroft Inc., 250 East Main Stree

2Figure 1. Indicating and Non-Indicating Ashcroft Pressure TransmittersTABLE OF CONTENTSGENERAL DESCRIPTION . . . . . . . . . . . . . . . . . 3INSTAL

3Ashcroft Pressure Transmitters, Series 4000 (refer to Fig. 1),are self-nulling, motion balance instruments. They utilize anon-bleed force balance, pn

ON STEAM LINES ASYPHON MUST BE USED.ON HIGH TEMPERATURELINES TWO FEET OFPIPE SHOULD BE USEDTO INSURE COOLING OFTHE LIQUID. TUBING ISRECOMMENDED INPLAC

5Air ConnectionsConnect the LOW pressure instrument air SUPPLY to the 1⁄4female NPT connection, marked SUPPLY, at the left of theprocess pressure conn

6Input ElementThe input element of the pressure transmitter is a pressure-sensitive bourdon tube. As mounted in a transmitter, increasingpressure rais

7Figure 7. Transmitter Actuation PrincipleI&M008-10061-1-01 250-1969-C_I&M008-10061-1/01 250-1969-C 12/20/13 9:09 AM Page 7

8GeneraIMany complaints of faulty transmitter operation have, oninvestigation, proven to be due to faulty installation. For thisreason, the following

9GeneralThe assemblies and parts illustrated in Figures 8 and 9 and listed in the Parts List are available for replacement purposes.When a detail part