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Fisher 444 Alphaline MECHANICAL, Mounting Stability , Access Requirements

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Rosemount Model 444 Alphaline Temperature Transmitters

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produce low-level signals proportional to their sensed temp erature. Model 444

temperature transmitters convert the low-level sensor sign al to a standard 4–20

mA dc signal that is relatively insensitive to lead length and electrical noise.

This current signal is then transmitted to the control room via two wires.

Figures 2-1, and 2-2 show recommended mounting configurations for

transmitter and sensor assemblies. See Section 6 Options for information

regarding Model 444 transmitter accessories.

MECHANICAL

CONSIDERATIONS

You can attach the transmitter directly to the sensor assembly as shown in

Figures 2-1 and 2-2. An optional mounting bracket permits the transmitter to be

mounted remotely from the sensor(s), either on a flat surface or attached to a

two-inch pipe (See Figure 2-11 on page 2-13). The choice of mounting method

must take into account a number of factors:

Mounting Stability Mounting stability is an important consideration. The transmitter, though

rugged, may require supplementary support under high-vibration conditions,

particularly if extensive thermowell lagging or long extension fittings are used.

In such instances, the pipestand mounting technique shown in Figure 2-11 on

page 2-13 is preferable.

AccessRequirements

When choosing an installation location and position, take into account the need

for access to the transmitter.

Housing Rotation You may rotate the transmitter in 90-degree increments to improve field access

to both compartments.

Terminal Side of

Electronics Housing Make wiring connections through the conduit open ings on the terminal side of

the electronics housing. Mount the transmitter so the terminal side is accessible,

and be sure to provide adequate clearance for cover removal.

Circuit Side of

Electronics Housing The transmitter electronics are installed in the circuit side of the transmitt er

housing. In case of electronic malfunction, provide adequate clearance for

circuit-side cover removal. Also, be sure to account for additional clearance if a

meter is to be installed. For more information regarding the meter option, refer

to Section 6 Options.

Contents

Main Page Product Manual 7:00 a.m. to 7:00 p.m. CST) 24 hours a day IncludesCanada) NOTICE 1 Model 444 Alphaline Temperature Transmitters Page Table of Contents SECTION 1 Introduction SECTION 2 SECTION 3 Calibration Page 1Introduction OVERVIEW Page 2Installation OVERVIEW GENERAL MECHANICAL Mounting Stability Access Requirements 2-3 FIGURE2-1. Recommended Process Mounting. FIGURE2-2. Recommended Process Mountingwith Drain Seal. ELECTRICAL Power Supply Field Wiring 2-5 FIGURE 2-4. Field Wiring for the Standard Model 444 Transmitters. { FIGURE 2-5. Field Wiring for Low-Power Model 444 Transmitters (444LL and LM). Sensor Connections 2-6 FIGURE 2-7. Characteristicsof Thermocouple and RTD Input Wires. FIGURE 2-6.Sensor Wiring Diagrams. Grounding Multi-Channel Installations Surges/Transients ENVIRONMENTAL Temp era tur e Environment 2-9 FIGURE 2-9. Model444 Transmitter Housing TemperatureRise. FIGURE 2-10.Sensor AssemblyDimensional Drawings. Moist or Corrosive Environments HazardousLocation Intrinsically Safe PROCEDURE Mechanical Electrical Page 2-13 FIGURE 2-11.Model 444 with Optional Mounting Bracket. FIGURE 2-12.Model 444 Dimensional Drawings PIPESTAND MOUNTING PANEL OR SURFACE MOUNTING Page 3Calibration OVERVIEW SAFETY MESSAGES RTD TRANSMITTER Page 3-4 THERMOCOUPLE TRANSMITTER Using a Compensated Thermocouple Simulator + 3-6 U s i n ga nI c e B a t h LOW-POWER TRANSMITTER Page Page 4Maintenance and Troubleshooting OVERVIEW HARDWARE DIAGNOSTICS TROUBLESHOOTING 4-2 TABLE4-1. Transmitter TroubleshootingSymptoms andCorrectiveActions. Symptom PotentialSource CorrectiveAction REPAIR Disassembly Procedure Reassembly Procedure Interchangeability of Parts Burnout Protection Adjustments REPAIR AND WARRANTY SERVICE RETURN OF MATERIALS 5Specifications and Reference Data FUNCTIONAL Page PERFORMANCE PHYSICAL Page Page LCD METER (OPTIONS D AND E) Functional Specifications Performance Specifications Physical Specification Page 5-9 TABLE5-3. 444 Model Structure. TypicalModel Number: 0444 RL3 U 1 A 2 E5 Q4 Model Product Description Code Input Type(1) 5-10 TABLE5-4. 444RL Fast Turn-on Model Structure. 5-11 TABLE5-5. 444LL, LM Model Structure. TABLE5-6. Meter Kits. Model ProductDescription Code Input Type j 5-13 TABLE5-8. Parts List forModel W444 Transmitter (CESI/CENELEC Approval). j 5-14 TABLE5-9. Parts List forModel T444 Transmitter (BASEEFAApproval). 5-15 TABLE5-10. Parts List for Model 444 RL Fast Turn On Transmitter(RTD Input). TABLE5-11. Parts List for Model 444 LL, 444 LM Low PowerTransmitter (RTD Input). j 5-16 TABLE5-12. Parts List for Model 444 Increased Accuracy or Special Range Transmitters. Code D Not used on transmitters,but recommended for repair activities. Page Page 6Options MOUNTING BRACKET LCD / ANALOG METER LCD METER Configuration Page LCD Meter Assembly LCD Meter Page ANALOG METER } Analog Meter Page Page Page Page Page Page Appendix B-1 BTemperature Sensor Reference Information TABLEB-1. Resistance VersusTemperature Curve Ro=100.00,a=0.00385 Reference Standard IEC 751. Page I-1 Index A B C D S T U V W Page Page Rosemount Inc. http://www.rosemount.com Fisher-Rosemount Limited Fisher-Rosemount 00809-0100-4263z 00809-0100-4263, Rev. AA