Emerson Level-Trol 2500 Скачать руководство пользователя страница 29

Страница: 29 / 32

Type 2500

Instruction Manual

Form 1013

December 2005

Relay Deadband Testing (Type 2500

Controller or 2500T Transmitter Only)

1. Replace the appropriate (proportional or specific

gravity) adjustment assembly with the 1/8-inch NPT

pipe plug according to the Replacing the

Proportional Valve section.

2. Turn on the supply pressure and set it to 1.4 to

2.4 bar (20 or 35 psig), depending on the

controller/transmitter operating range.

3. By changing the process variable and adjusting

the RAISE LEVEL or ZERO ADJUSTMENT control,

set the output pressure to 1.0 or 2.0 bar (15 or 30

psig). While monitoring the output pressure, slowly

change the process variable until the output

pressure just changes, and record the value of the

process variable at the detection point.

4. Change the process variable in the opposite

direction until the output pressure just changes and

again record the value of the process variable. If the

difference between the two recorded values (the

deadband) is more than 0.2% of the maximum

displacer length, the relay must be replaced or

repaired according to the Changing Relay section.

5. Turn off the supply pressure, remove the pipe

plug, and install the appropriate adjustment

assembly.

Replacing the Proportional Valve

Note

The following procedure, to convert to

or from the pipe plug or the desired

adjustment assembly, can be used for

any type number covered in this

manual.

1. Remove the tubing (key 10) from the proportional

band valve assembly.

2. Unscrew the base of the PROPORTIONAL

BAND or SPECIFIC GRAVITY adjustment assembly

(key 36 or 90, figure 16), or the 1/8-inch NPT pipe

plug (key 73, not shown), from the relay base (key

23, figure 16).

3. Install the pipe plug or the desired adjustment

assembly into the relay base.

4. Replace the tubing (key 10) to the proportional

band valve assembly.

Changing Relay

The relay may be removed for cleaning or

replacement.

Removal

1. For a controller or transmitter with indicator

assembly, loosen the two lower relay screws (key

96) and slide out the indicator base plate (key 53).
2. Disconnect the tubing (key 10 or 11) from the

relay.
3. Remove both mounting screws, relay, and relay

gasket (keys 43, 34, and 22).

Replacement

1. Install a new gasket (key 22), the replacement

relay (key 34), and secure with two mounting screws

(key 43). On a controller or transmitter with an

indicator assembly, slide the base plate under the

two lower screws of the relay case, align the plate so

the pointer will read properly, and tighten the screws.
2. Connect the tubing (key 10 or 11) to the relay.
3. Test the relay deadband, according to the Relay

Deadband Testing procedure in this section.
4. If the deadband is within tolerance, go to the

Calibration section.

Parts Ordering

Whenever corresponding with your Emerson

Process Management sales office about this

equipment, use the controller/transmitter type

number and the serial number. The serial number is

found on the nameplate (key 215, figure 16). When

ordering replacement parts, also state the complete

11-character part number of each part required as

found in the following parts list.

Note

Use only genuine Fisher replacement

parts. Components that are not

supplied by Emerson Process

Management should not, under any

circumstances, be used in any Fisher

instrument. Use of components not

supplied by Emerson Process

Management will void your warranty,

might adversely affect the

performance of the instrument, and

might jeopardize worker and

workplace safety.

Содержание Level-Trol 2500

Страница 1: ...c Gravity Adjustment Transmitters Only 15 Calibration 15 Precalibration Requirements 15 Wet Calibration 16 Dry Calibration 16 Controller Transmitter and Torque Tube Arm Disassembly 16 Determining the Amount of Suspended Weight 16 Calibration Procedure 17 Type 2500 Controller and 2500T Transmitter 18 Type 2500S and 2503 Controllers 19 Figure 1 2500 or 2503 Series Level TrolR Controller Transmitter ...

Страница 2: ...ading and understanding the contents of this manual If you have any questions about these instructions contact your Emerson Process Managementt sales office Description These instruments control or transmit the fluid level the level of interface between two fluids or the density specific gravity Each unit consists of a 249 Series displacer type fluid level sensor and a 2500 or 2503 Series pneumati...

Страница 3: ...smitter If controller or transmitter is equipped with an integrally mounted Type 67FR filter regulator typical supply pressure to the regulator is from 2 5 bar 35 psig to 17 bar 250 psig maximum For supply pressures to the filter regulator refer to the appropriate regulator instruction manual Steady State Air Consumption 2500 Series Controllers and Transmitters 2500 2500C 2500R 2500S and 2500T See...

Страница 4: ...isual monitoring of torque tube motion 2 This term is defined in ISA Standard S51 1 3 Control and stability may be impaired if the maximum pressures are exceeded 4 Adjusting the span of the differential gap controller is equivalent to adjusting the deadband 5 These statements apply only to units sized to produce a full output change for a 100 level change at the maximum proportional band dial sett...

Страница 5: ...nitic Stainless Steels and Special Alloys Torque Tube N05500 1 316 Stainless Steels N06600 N10276 1 N05500 is not recommended for spring applications above 232_C 450_F Contact your Emerson Process Management sales office or application engineer if temperatures exceeding this limit are required Installation The 2500 and 2503 Series controller transmitters work in combination with 249 Series displac...

Страница 6: ...must be installed at the site A damping plate is installed in the lower screwed or flanged connection see figure 3 to provide more stable operation Be certain that the cage equalizing connections and the damping plate are not plugged by foreign material A cageless sensor comes with its displacer separated from the sensor assembly Displacers Figure 3 Damping Plate Location W0144 1 IL W2141 1B IL DI...

Страница 7: ...ations With flanged connections use standard gaskets or other flat sheet gaskets compatible with the process fluid Spiral wound gaskets without compression controlling centering rings cannot be used for flange connections As shown in figure 6 mount the cage by running equalizing lines between the cage connections and the vessel A shutoff or hand valve with a 1 1 2 inch diameter or larger port shou...

Страница 8: ...vel applications install a gauge glass on the vessel Side Mounted Sensor If a stillwell is required see figure 7 attach the displacer to the displacer rod from inside the vessel Connect the displacer as shown in figure 8 locking the assembly with the cotter spring provided If a stillwell is not required attach the displacer rod before mounting the sensor on the vessel Then you can swing the displa...

Страница 9: ...E VIEW WITHOUT STILLWELL SIDE VIEW SHOWING STILLWELL SIDE MOUNTED W0645 1 IL W0229 1A IL COTTER SPRING DISPLACER ROD LOCKING NUTS DISPLACER SPUD DISPLACER STEM EXTENSION DISPLACER STEM END PIECE TYPE 249V W0228 1A IL DISPLACER ROD DISPLACER SPUD ALL OTHER TYPES COTTER SPRING Figure 8 Displacer and Displacer Rod Connections ...

Страница 10: ... gas While use and regular maintenance of a filter that removes particles larger than 40 microns in diameter will suffice in most applications check with a Fisher Field office and Industry Instrument air quality standards for use with corrosive air or if you are unsure about the proper amount or method of air filtration or filter maintenance Figure 9 Controller Transmitter Dimensions and Connectio...

Страница 11: ...APPER ALIGNMENT SCREW SHAFT CLAMP NUT 3 WAY VALVE NOZZLE PLUNGER SPECIFIC GRAVITY ADJUSTMENT ZERO ADJUSTMENT POINTER ASSEMBLY FLAPPER RELAY SPAN ADJUSTMENT BOURDON TUBE DETAIL OF TYPE 2500S ON OFF CONTROLLER RAISE LEVEL DIAL FOR LEFT HAND MOUNTING RIGHT HAND MOUNTED TYPE 2500 PROPORTIONAL CONTROLLER RIGHT HAND MOUNTED TYPE 2503R ON OFF CONTROLLER DETAIL OF TRANSMITTER ADJUSTMENTS INDICATOR ASSEMBL...

Страница 12: ...rked on both sides with an arrow The arrow points to the left on one side and to the right on the other When the sensor is mounted to the left of the controller transmitter the arrow on the raise level dial should point to the left as shown in figure 10 If the sensor is to the right the arrow should point to the right If necessary remove the two mounting screws turn the dial over so the arrow poin...

Страница 13: ...rease the pressure Tighten the locknut after setting the regulator pressure 2 Set the process variable to its minimum value 3 Make sure that the PROPORTIONAL BAND or SPECIFIC GRAVITY control is at the setting determined earlier in this section Then set the RAISE LEVEL or ZERO ADJUSTMENT control at an appropriate value according to table 6 This table gives recommended settings based on maximum and ...

Страница 14: ...nt on the indicator plate slight adjustment may be necessary as described at the end of step 3 7 Decrease the process variable until the OUTPUT gauge changes to 0 bar 0 psig for direct or supply pressure for reverse action depending on controller range The process variable should be at the desired low trip value 8 If all prestartup checks are satisfactory proceed to the Startup section If performa...

Страница 15: ...loosen the knurled adjustment screw and rotate the adjustment lever around the RAISE LEVEL dial To raise the fluid or interface level or increase density rotate this knob in the direction of the arrows To lower the level or decrease density rotate the knob in the opposite direction This procedure is the same for either direct or reverse action Tighten the knurled screw Note The RAISE LEVEL dial do...

Страница 16: ...assembly WARNING To avoid personal injury from contact with the process fluid lower the vessel level below the sensor torque tube arm or shut off the cage equalizing valves and drain the cage before proceeding For closed vessels release any pressure that may be in the vessel before removing the sensor assembly When removing the displacer from the displacer rod or removing the controller transmitte...

Страница 17: ...eight as determined in the equation above Wd Weight of the displacer in pounds determine by weighing displacer 0 0361 Weight of one cubic inch of water specific gravity 1 0 in pounds V Volume in cubic inches of the portion of the displacer submerged Or V π 4 displacer diameter 2 length of displacer submerged SP GR Specific gravity of the process fluid at operating temperature For interface level m...

Страница 18: ... check procedure 3 Adjust the RAISE LEVEL Type 2500 or ZERO ADJUSTMENT Type 2500T to the appropriate value per table 6 This table gives recommended settings based on maximum and minimum possible PROPORTIONAL BAND Type 2500 or SPECIFIC GRAVITY Type 2500T settings If an intermediate PROPORTIONAL BAND or SPECIFIC GRAVITY setting is necessary extrapolation may be used to determine a new RAISE LEVEL or...

Страница 19: ...far as possible and the output pressure span is still too large or too small slightly adjust the PROPORTIONAL BAND or SPECIFIC GRAVITY adjustment as follows D If the output pressure span is too large slightly increase the PROPORTIONAL BAND or SPECIFIC GRAVITY setting D If the output pressure span is too small slightly decrease the PROPORTIONAL BAND or SPECIFIC GRAVITY setting 14 Repeat the procedu...

Страница 20: ...ighten the plate screws and go to the startup section Note Any sliding of the level set arm key 28 figure 16 in the following step changes the zero as well as the differential gap 9 To adjust the differential gap loosen the two level set mounting screws see figure 16 and slide the flexure strip base key 27 right or left along the elongated slotted hole as follows D To decrease the differential gap...

Страница 21: ...e in fluid level fluid to fluid interface level or density from the change in the buoyant force the fluid exerts on the sensor displacer The displacer through a mechanical linkage imparts a rotary motion to the torque tube shaft This rotary motion positions the flapper according to the level position of the displacer the nozzle Bourdon tube arrangement sends a pneumatic signal to the relay valve A...

Страница 22: ... end of the relay valve which allows output pressure to exhaust This relay valve action reduces the output pressure to the final control element and is the reverse of the previous explanation The proportional valve varies the reaction of the Bourdon tube to changes in the output pressure For additional information on the proportional valve action refer to the following proportional valve subsectio...

Страница 23: ... part of the output pressure change vents through the proportional valve exhaust Type 2500S Controller This construction has the same flapper relay and proportional valve as the Type 2500 controller However the nozzle is connected figure 12 in such a way that output pressure feedback from the movement of the Bourdon tube moves the nozzle in the opposite direction of the flapper This action complet...

Страница 24: ... effect Maintenance The 2500 and 2503 Series controllers transmitters work in combination with 249 Series displacers Refer to figure 16 for key number locations unless otherwise indicated WARNING Always wear protective clothing gloves and eyewear when performing any maintenance operations to avoid personal injury When replacing the sensor assembly the displacer may retain process fluid or pressure...

Страница 25: ...justment Ensure the flapper is not loose on the torque tube shaft and is centered on the nozzle Replace or tighten flapper assembly as necessary and or center flapper on nozzle 2 5 Process variable changed Ensure the process variable has not changed from original calibration settings or displacer not designed for specific gravity of process Change process variable back to original specification or...

Страница 26: ... from the joint between the controller transmitter case and the torque tube arm Remove the four cap screws key 39 figure 14 that hold the controller transmitter or heat insulator to the torque tube arm Pull the case straight out from the torque tube arm easing it over the shaft coupling key 36 figure 14 if one is installed 4 If the controller transmitter has a heat insulator remove the four button...

Страница 27: ...e tube assembly rotary shaft with the shaft coupling key 36 Tighten both set screws key 38 with the coupling centered as shown in figure 14 Then mount the insulator assembly key 35 on the controller transmitter case with four button head cap screws and washers keys 40 and 53 Tighten the screws CAUTION In the following step avoid bending the rotary shaft of the torque tube assembly Bending or side ...

Страница 28: ...ed base connection The other tubing goes to the unmarked base connection With an indicator assembly install the pointer assembly on the rotary shaft and tighten the hex nut 5 Perform the calibration procedure Changing Action Note The following procedure is necessary to restore previous action if the mounting method has been changed Figure 16 shows key numbers 1 Reposition the Bourdon tube and indi...

Страница 29: ...hown from the relay base key 23 figure 16 3 Install the pipe plug or the desired adjustment assembly into the relay base 4 Replace the tubing key 10 to the proportional band valve assembly Changing Relay The relay may be removed for cleaning or replacement Removal 1 For a controller or transmitter with indicator assembly loosen the two lower relay screws key 96 and slide out the indicator base pla...

Страница 30: ...ring pl steel 2 req d 1A465828992 14 Gauge glass 2 req d 0T019206042 15 Gauge glass gasket chloroprene 2 req d 0T019104082 16 Bourdon tube assembly Brass Type 2500 and 2500T 3 to 15 psig 32B1231X012 6 to 30 psig 32B1231X022 Type 2500S 0 to 20 psig 32B1233X012 0 to 35 psig 32B1233X022 Type 2503 0 to 20 psig 32B1234X012 0 to 35 psig 32B1234X022 Stainless steel Type 2500 and 2500T 3 to 15 psig 32B123...

Страница 31: ... 2500 Series Controller Transmitter Constructions 30A8865 D DOC 30A8869 D DOC 30A8866 C DOC TYPICAL CONTROLLER TYPE 2503R CONTROLLER CONSTRUCTION DETAIL OF INDICATOR ASSEMBLY ON C VERSIONS SEE VIEW A LEVEL SET MOUNTING SCREWS NOTE PARTS NOT SHOWN 4 24 38 39 47 AND 48 ...

Страница 32: ...1A621914012 90 Specific gravity adjustment assembly Standard and high temperature 10A8870X0A2 Corrosive service 10A8870X022 215 Nameplate Heat Insulator figure 14 35 Heat Insulator Assembly stainless steel 22A0033X012 36 Shaft Coupling stainless steel 1A577935032 37 Shaft extension N05500 1B681540022 38 Set screw stainless steel 2 req d 1E6234X0022 39 Cap screw pl steel 4 req d 1A381624052 40 Cap ...

Результаты поиска

Содержание Level-Trol 2500

Отзывы:

Бренды по названию

Популярные бренды

Emerson Level-Trol 2500, Инструкция по эксплуатации

Результаты поиска

Содержание Level-Trol 2500

Отзывы:

Бренды по названию

Популярные бренды