MMC D-2401-2 Portable Gauging Tapes
Specifications
- Manufacturer: MMC INTERNATIONAL CORP.
- Model: D-2401-2
- Function: Triple Function Gauging Tape
- Applications: Restricted Applications
- Measurements: Ullage, Oil/Water, Temperature
- Technical Approvals: Factory Mutual, BASEEFA, Lloyd’s Register, Bureau Veritas MED
General Safety Guidelines
Before using the gauging tape, ensure you read and understand all safety precautions outlined in the user manual.
Powering the Device
The device operates on intrinsically safe batteries. Use only the specified batteries for safe operation.
Taking Measurements
To measure liquid levels, select the appropriate tape length based on the tank size. Insert the tape carefully into the tank until it reaches the desired level.
Reading Display
The device features a liquid crystal display indicating measurements. Ensure the display is visible and readings are clear.
Storage and Maintenance
After each use, clean the gauging tape and store it in a dry and safe place. Avoid exposing the device to extreme temperatures.
Frequently Asked Questions
Q: What is the minimum detectable tank bottom liquid level?
A: The minimum detectable tank bottom liquid level is 3/8 (10mm).
Q: Which batteries are recommended for safe operation?
A: Use 9 Volt Eveready #522 or Duracell MN1604 batteries for intrinsically safe operation.
Q: How accurate are the measurements with this gauging tape?
A: The gauging tape offers high linear accuracy as per the manufacturer’s specifications.
THEORY OF OPERATION
3.1 Drawing D-2562-1FRL illustrates the main components of the Ullage, Temperature and Interface system. A tape reel contains the calibrated tape. The reel crank on the driving hub is used by the operator to raise and lower the sensing head assembly which is attached to the reel via the tape. Before lowering or raising the tape, the reel brass thumb screw lock must be unlocked.
3.2 The sensor head assembly contains two piezo-electric crystals, a pair of interface or conductivity pins, a temperature sensor, located in one of the conductivity pins and electronic circuit board. The sensor is connected electrically to the driving hub electronics by the two wires encased in the gauging tape plastic jacket, which covers and hermetically seals these wires and centers graduated metallic gauging tape. The metallic tape is used as a ground return conductor, which when including the two wires straddling it, form a rectangular three conductor transmission cable.
3.3 The electronic circuits in the hub assembly are comprised of a LCD digital display which provides temperature readings when the system is in the temperature mode; an analog to digital converter; a power on-off switch; a mode switch which permits operator to select the temperature mode or ullage/interface mode; a night light switch and ancillary electronic parts all assembled on a printed circuit board. A 9 volt battery power source and audio horn are located within the tape reel hub assembly below the P.C. board of the modular hub cover assembly.
3.4 When the system is placed in the ullage/interface mode, and as the sensor is immersed in a non-conductive fluid such as oil, a sonic signal originated by the sensor head circuits freely crosses the sensor gap and is detected, amplified and then transmission tape to the hub electronics board, which in turn drives a horn in the turning drum assembly. A high pitched continuous audible signal is then emitted. When the sonic sensor is in air, the sonic signal does not cross the sensor gap and therefore, the horn is silent.
3.5 When the sonic sensor is immersed in a conductive fluid, such as the water layer side of an oil/water interface operation is as above except that the conductivity pins within the sensor gap now permit a minute current to flow between the pins. This current flow is detected by the sensor electronic circuitry with the sensor housing and suitability conditioned to cause the sonic signal to be periodically interrupted, yielding a “beeping” tone for operator identification.
3.6 When the system is placed in the temperature mode the ullage and interface circuits within the sensor barrel are de-energized, also disengaging the audio signals associated with the ullage/interface mode. The integrated circuit temperature sensor housed within the grounded interface pin now functions as an extremely accurate linear temperature to current transducer. As the temperature at the sensor rises, so does the temperature sensor current. By passing the temperature sensor current via the transmission tape, though the electronic component network, with the turning drum, input to an A to D converter is caused to vary linearly with temperature. Span control (R18) is adjusted to provide a fixed reference voltage, to scale for either a Centigrade or Fahrenheit reading device. Coded digital output from the A to D converter to the LCD Display is used to prove accurate and fast temperature readings.
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returned
The two potentiometer controls, R13 and R18, perform as a two point temperature calibration adjustment.
A complete temperature calibration procedure is later described in this manual. (See Section VIII).
Temperature re-calibration is recommended at yearly intervals. Please note that units
Temperature Calibration during standard or extended warranty periods are not covered by warranty statement.
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SECTION IV
4.0 REQUIRED CONDITION AND RECOMMENDATION FOR SAFE USAGE
The attention of the user of this apparatus is drawn to the possible hazards of ullage, interface and temperature measurements within flammable liquids, which are also known to be generators of static electricity.
Adhering to the specific safety directives of your company, is the responsibility of the user.
The following is a general guidance to safe usage, drawn from the advice and experience of various industry sources.
The specific safety standards or directives of your company are to be strictly adhered to, with the general guidance given here being regarded as only a supplement to existing and established operating safety procedures.
4.1
This apparatus must be earthed (grounded) to the liquid tank containment vessel or tank, before and during introduction into the vessel. The earthed conductor must not be disconnected until the apparatus is completely withdrawn from the vessel being gauged. A suitable grounding cable is provided as part of the gauging unit. Proper grounding of this cable is the responsibility of the user.
4.2
RECOMMENDED SAFE USAGE CONDITIONS FOR THE TRIPLE FUNCTION GAUGING TAPE:
4.2.1 The grounding of the unit, and adhering to the specific company safety standards or directives, is the sole responsibility of the operator.
4.2.2
Sensor entry into tanks or vessel immediately following a tank filling or loading operation of known static accumulator type petroleum products or other such flammable liquids, should not be attempted until, at least a period of 30 minutes has elapsed since the cessation of filling.
4.2.3
Clean oil distillates are in general, known to be accumulators of static electricity due to their low conductivity (I.E., less than 100 Pica Semians/Meter) and therefore may require relaxation periods of longer than 30 minutes before gauging is attempted.
4.2.4
The foregoing does not consider the use of anti-static additives to clean oils, as generally easing the need for proper precaution, unless actual and specific product testing has shown the product to have conductivity levels which eliminate the danger of static electric charging.
4.2.5
Sensor entry into tanks or vessels that have been water washed and which previously contained, or still partially contain petroleum products is not recommended unless a sounding pipe is provided, and approved for such use, or at least a period of five hours has elapsed since the completion of the working operation.
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SECTION V
5.0 OPERATION
5.1
FAMILIARIZATION WITH OPERATING CONTROLS AND FEATURES LOCATED
ON THE TAPE REEL HUB COVER PANEL:
5.1.1
Turn on power by momentarily depressing the “Off/On” push-button switch (1) located at left of panel. The display should read 1XX.X* indicating that the system is in the Ullage/Interface mode.
5.1.2
Looking at the top left hand corner of the LCD display notice if the symbol “Lo Bat” appears. If the symbol is displayed, the battery voltage is low and the battery should be replaced (see Section VII Paragraph 7.5). Always replace the battery if “LO BAT” appears even though the digital display turns on. Temperature readings with a low voltage battery (below 7.0 Volts) are unreliable.
5.1.3
Once again, momentarily depress the power “On/Off” switch. Note that the display turns off. Always turn power off when the system is not in use to prolong battery life.
Depress the “Off/On” switch once more. Display turns on and reads 1XX.X* indicating the Ullage/Interface mode.
*NOTE: Due to an inherent digital uncertainty of the A to D converter, some digital displays, whenever in the Ullage/Interface mode, will read 00.0 instead of 1XX.XX.
5.1.4
Now momentarily depress the “Mode” switch at the right of the panel. The display should now switch to the temperature mode as indicated by a reading on on the display indicative of the temperature of the sensor tip.
Once again depress the “Mode” switch and note that the display reads 1XX.X* (Ullage/Interface Mode). Depressing the “Mode” switch alternately changes the function from temperature to Ullage/Interface and vice versa. Depressing the power “Off/On” switch alternately turns power off or on regardless of which mode was in operation. However, when power is switched on again the system will always come on in the Ullage/Interface mode.
5.1.5
Depress the night light switch (3) at upper center of panel when it is too dark to see the display. The display background will illuminate and the reading should now be discernible.
5.2
ULLAGE/INTERFACE MEASUREMENTS:
5.2.1 If power is off, depress power “Off/On” push-button switch. The system comes on in Ullage/Interface mode (display reads 1XX.X).
5.2.2 If the power was on and the system is in temperature mode, depress the “Mode” switch at right of panel to alter function to Ullage/Interface
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5.2.3 Make sure “LO BAT” Does not show at left upper corner of display
5.2.4
After grounding the assembly, insert the barrel of the gauging into the valve. Un-lock the tape reel lock, by rotating the brass lock thumbscrew counterclockwise turning position hub seat. Grasp the knurled reel crank hand and lower the sensor head tape assembly, which contains the sonic sensor, into the tank. Always exert a restraining force to prevent the sensor from descending too rapidly or free falling.
CAUTION!
Under no circumstances should the reel and tape be permitted to unwind without restraint. Permanent damage may be incurred to the sensor head or to the calibrated tape if the head is permitted to fall freely.
5.2.5
Lower the sensor head slowly until a tone steady is heard. If the surface of the fluids is oil or other non-conductive fluid, a continuous audible tone will be heard. If the surface of fluid is water or other conductive fluid, the audible tone heard, will be a “beeping” tone.
5.2.6 Define measurement by raising the sensor head until the sound just ceases. Lower until sound is just heard again, to refine ullage level.
5.2.7 Place gauging tape against ullage referenced point and read ullage on tape Note this reading as the surface liquid ullage level.
5.2.8
To find the oil-water interface point, continue to lower the sensor into fluid, noting that the audible tone is continuous. When the audible signal changes to a “Beeping” tone, the sensor has entered the water column underneath the oil.
5.2.9 Raise the sensor very slowly until the tone once again becomes continuous. Repeat if necessary to refine water entry point (Interface level).
5.2.10
Again, read the ullage on the tape. By subtracting the first reading obtained (step 7) from this reading, the total product depth is thus determined. By subtracting the second water level ullage from the maximum tank depth, water level innage is determined.
5.2.11
When the measurement is completed, place the spring loaded wiper knob in the “On” position while rewinding the tape until sensor is stored with in the vapor valve entry barrel. Do not close the vapor valve until the fully “stowed” position is confirmed, by noting that yellow pop-up button on top of the wiper housing is “up”
5.2.12 Lock the reel by rotation the crank/reel lock thumbscrew down position (parallel to hub).
Depress power “Off/On” switch to conserve battery power.
5.2.13 Close the vapor valve, disconnect the valve securing cap, remove the gauging unit, disconnect the grounding cable. Replace the vapor valve cap.
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5.3 TEMPERATURE MEASUREMENT PROCEDURE
5.3.1
If power is off, turn unit on by depressing “Off/On” push-button switch. Unit comes on in Ullage/Interface mode. Depress “Mode” push-button switch to select temperature.
5.3.2 If unit was on and in Ullage/Interface mode, simply press the “Mode” push-button to select temperature.
5.3.3
Make sure “LO BAT” does not show at left upper corner of display. If “LO BAT” appears, replace battery even though the digital display turns on. The display may continue to operate even though the battery voltage is below normal. Temperature reading however, may be in error.
5.3.4
Ground the assembly, release the turn handle reel lock. Lower the sensing sensor to the deepest reading desired. Make sure to exert restraining force while lowering.
5.3.5
When the desired temperature ullage level is reached, allow the sensor to at this point for at least two (2) minutes. Then joggle the sensing sensor up and down, approximately 6″ above and below the desired measurement level until the displayed temperature reading settles. Record this reading. For heavy crude oil products, the joggling procedure is a necessity to insure accurate readings. The viscous nature and low thermal conductivity properties of these petroleum products, makes the joggling procedure a necessity to insure accurate temperature in a minimum amount of time.
5.3.6 Raise the sensor to the next ullage level to be measured. Repeat step 6.3.5. Continue raising sensor to all levels at which readings are desired.
5.3.7
When the measurements are complete, push “Off/On” button to turn off and conserve battery power. Rewind the tape into the carriage reel assembly. Wipe the tape as it is rewound by placing the spring loaded wiper in the “On” position.
5.3.8 Lock the reel by rotation reel lock crank down, position. Follow the same final procedure as described in step 5.2.13 above.
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SECTION VI
6.0 CARE AND MAINTENANCE
Proper care and maintenance should be practiced to maintain long trouble free and accurate service and to maximize battery life, as follows:
6.1
When not in use, make sure power is off as evidenced by display being extinguished.
6.2
Store sensor head assembly in the fully wound position and store in a dry location.
Do not allow the instrument to remain for long periods in direct sunlight, or store in
temperature above 125° F, or in temperature below freezing. Such temperatures may damage
the liquid crystal display.
6.3
Wipe excess oil or water from tape, and sensor head. Each time the sensor is raised
from the tank, hold the spring loaded tape wiper switch in the “On” position.
6.4
Never permit tape and sensor head to unwind freely (control speed of descent by
usage of a restraining force on crank).
6.5
BATTERY REPLACEMENT (See Approval Label for correct type)
The battery should be replaced whenever the “Lo Bat” symbol appears at the upper left corner of the display. If the sensor is used to obtain temperature readings when the battery is low, large errors may result. Always replace battery in a gas free atmosphere. Remove the six machine screws on the hub cover. Lift the cover with its attached P.C. Board. The battery is retained within the reel turning drum a spring clip battery holder. Remove the battery from the battery cap connector. Replace the battery with a fresh battery of the type listed on the approval label only. Take care to align the viton cover gasket, cover, and machine screw fasteners when re-assembling to tape reel hub.
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7.0 CALIBRATION PROCEDURE
SECTION VII
7.1
ULLAGE:
The ullage circuits do not require calibration in the field with proper care and handling the equipment should function indefinitely.
7.2
TEMPERATURE SENSOR CALIBRATION
The temperature sensor and its associated electronic circuitry have been accurately calibrated at the factory . Temperature Calibration by MMC is recommended at twelve-month intervals, with periodic checks being carried out as necessary between these intervals.
Before attempting any calibration, make sure that the battery is at a proper voltage level as evidenced by the fact that “Lo Bat” does not appear at the upper left corner of the display when the equipment is powered. Low battery voltage will produce errors in temperature readings. If “Lo Bat” appears on the display, check battery voltage and replace. If necessary, calibration of the temperature sensor may be accomplished as follows:
7.2.1
Use thermometers accurate to ±0.1° and preferably graduated in one-tenth degree intervals. If mercury thermometers are employed, use two separate thermometers to provide greater resolution. One to cover low temperatures cover low temperatures and the other to cover the high temperatures.
7.2.2
Remove the six machine screws on the hub cover. Lift the cover and attached P.C. Board from Hub exposing two potentiometers at back lower left of board. Lowest potentiometer, marked (R13), is the “Zero” control and the potentiometer to the left and above, marked (R18), is the “span” control. (See drawing B-2401-31).
7.2.3
Turn display on by depressing power “Off/On” button momentarily. Place system in temperature mode by depressing “Mode” switch. Display should now read temperature at sensor tip.
7.2.4
Prepare two temperature baths, a cold bath of approximately one-gallon of water, and a hot bath of approximately one gallon of water at a temperature at least 60° higher than the cold bath.
7.2.5
Place the sensor in the cold bath with thermometer and stir the bath well to equalize temperature. Keep sensor and thermometer together at approximately the same point in the bath.
7.2.6 Record: Sensor Cold Reading as = pc (as read from digital display)
Record Reference: Thermometer Cold reading as = tc
7.2.7 Repeat the above procedure in a hot bath.
7.2.8 Record: Sensor Hot Reading as = ph (as read from digital display)
Record Reference: Thermometer Hot Reading as = th
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7.2.9 Calculate Zero Correction = tc (ph – pc) – pc th – tc
7.2.10
Place sensor in cold bath. Stir and wait until sensor reading on display stabilizes. Note reading and then adjust “Zero” control potentiometer marked (R13) so that the zero correction calculated in step 8.2.9. above is added to or subtracted from the sensor reading. If the answer in step 8.2.9 above is positive, add the correction, if negative, subtract.
7.2.11 Now place thermometer in the cold bath with the sensor and stir. Now adjust the “span” potentiometer until the two reading are equal (the displayed reading, and the reading of reference thermometer).
7.2.12
Check readings in hot bath. Slight touch-up of “Span” control may be required. Normally not more than a ±0.1 degrees correction is necessary if the calculated measure “Cold” temperature procedure has been performed correctly.
The above method allows the operator to perform the calibration in one step. If desired, and particularly if the error is minor, an adjustment of zero may be performed in the cold bath to equal the thermometer reading. Then the span may be adjusted in the hot bath. However, this procedure requires repetition until both cold and hot bath readings are correct without further adjustment in either cold or hot baths.
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SECTION VIII
8.0 GAUGING TAPE REPLACEMENT (With or without new sensor attached)
The gauging tape used for the Trimode restricted gauging system is similar but not inter -changeable with the gauging tapes used for closed gauging systems.
The tapes used are bright white faced steel core type, which have been encapsulated with a tefzel jacket. (Tefzel is a registered trade name of the Dupont Corporation). The tapes is terminated at the display electronics hub PCB module connection points, by soldered leads within tape reel internal core. The sensor is connected to the tape be means of a quick connect plug to the tape socket plug.
As with all tefzel coated MMC gauging tapes, the outer surfaces are factory treated to render the surfaces of the tapes anti-static properties.
The patented process to achieve the desirable anti-static condition, is not defeated by tape wiping or cleaning with standard petroleum based solvents.
Gauging tape replacement is not difficult, but requires careful attention to the travel path of tapes as it exits from the tape reel assembly, passes over the interior guide rollers, cursor pin assembly, anti-chafing rollers and on through the wiper housing .
8.1 To replace a tape, remove the machine screws from the hub cover and lay it to the side.
8.2 Remove battery from the battery holder, unplug battery cap and storage barrel by loosening cap nuts on wiper housing.
8.3 Remove round vapor seal assembly on top of the tape wiper by backing off the Allen set screws which hold it in place and place tape wiper knob in “Off” position.
8.4 Completely unreel tape and sensor head. Note that the end of the metallic tape inside the hub is grounded by a machine screw and washer. The tefzel tape cover at this point has been trimmed away to permit good ground contact. Also note that the tape’s outer conductors are spliced to two to the wires that originated at the circuit board. (Note the color of these wires so that when reassembling, the correct wire will be connected to the top and bottom tape conductors).
8.5 Detach the tape at the hub by removing the grounding machine screw and unsolder the splice connections. Pull the tape through the slot in the side of the hub and out through the tape wiper.
8.6 Attach a new tape to the hub by reversing the above procedure making sure that the tape numerals face in the same direction as the previous tape numeral faced. Make sure that the splices are well insulated (use shrink tubing) and that the grounding machine screw and washer are fastened tightly to provide a good metallic ground between center ground tape conductor and hub.
8.7 Replace battery, battery cap and hub cover. Connect old sensor to tape, if not supplied with Replacement. Rewind tape on reel.
8.8 Replace tape vapor seal assembly and sensor storage barrel.
8.9 Perform a temperature calibration in accordance with Section VII.
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SECTION IX
9.0 HUB COVER AND P.C. BOARD REPLACEMENT To replace the turning drum hub cover and P. C. Board, follow the steps outlined below: 9.1 Remove the six machine screws from the hub cover, and extract cover, gasket and P.C. Board. 9.2 Unplug battery cap. 9.3 Unsolder wires that go to small horn (Note that these wire originate from same strip that connects battery cap). 9.4 Now carefully examine three conductor strips that originate at upper right hand corner of P.C. board. These wires may not be the same color code as the replacements hub P.C. Board and it is important that they be connected to the correct points. Note that one wire (ground) has a terminal lug attached and therefore replaces the previous wire with terminal lug. 9.5 Now make a note of the wires that go to top and bottom splices of outer tape conductors. One of these wires goes to a point on P.C. Board Labeled “+V”. The other to a point on P.C. Board labeled “SIG”. Note which goes to top and which goes to bottom conductor. For example: “SIG” to top connector and “+V” to bottom connector. 9.6 Unsolder spliced conductors and remove the nut ground connecting the gauging tape to the driving drum. This now completes disassembly and the old hub assembly can be put aside. 9.7 Position new hub cover and P.C. Board and solder to horn and insulate the two free wires originating from the battery cap strip line. The polarity of these two wires is not important. 9.8 Reconnect ground wire with terminal lug to driving drum ground post and replace and tighten nut. 9.9 Re-solder and insulate “+V” and “SIG” wire to outer tape conductors taking careful notice of where they originated. (see Step 10.5 above) 9.10 Replace battery and connect battery cap. 9.11 Re-assemble hub cover and attached P. C. Board with six machine screws being careful to line up neoprene gasket. 9.12 Perform temperature calibration in accordance with Section VII.
.
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SECTION X
10.0 FAULT FINDING (SEE DRAWING B-2401-31)
The following section covers only simple faults that may occur. No attempt has been made in this section to cover highly technical faults.
PROBLEM NO. 1:
Unit does not turn on when power “OFF/ON” switch is depressed.
PROCEDURE & EXPLANATION:
If unit does not turn on at all, check battery voltage using a voltmeter. If battery voltage is lower than four (4) volts because units has been accidentally stored for a lengthy period with power on the voltage is too low to illuminate display. Replace battery. (See Section VII Paragraph 7.5). If battery is okay, check power “ON/OFF” switch using an OHM meter. Switch should normal show an open circuit. When depressed OHM meter reading should be less than 2 Ohms. If switch is okay integrated circuit chip is probably at fault. Return to factory or service center for repair.
PROBLEM NO. 2:
Unit stays on all the time, even though “OFF/ON” push-button is depressed.
PROCEDURE & EXPLANATION:
This symptom is usually indicative of a faulty power “OFF/ON” push-button switch. Check the switch with an Ohmmeter as explained in Problem No.1 above.
PROBLEM NO. 3:
Unit turns on and off, however, when “Mode” switch is depressed system does not switch to temperature it stays in Ullage/Interface mode always.
PROCEDURE & EXPLANATION:
Use OHM meter to make sure “Mode” switch is normally open and when depressed is closed. If switch is faulty replace. If switch check out okay, problem is probably an integrated circuit chip. Return to factory for repair.
PROBLEM NO. 4:
Temperature readings are erroneous
PROCEDURE & EXPLANATION:
A.) When display is on does “Lo Bat” appear at upper left corner? If so, replace battery with a new battery.
B.) If “Lo Bat” does not appear and display contrast in temperature mode is not good and in particular the decimal point is very faint or not visible, check battery voltage using voltmeter. If voltage has fallen below 5.0 “Lo Bat” may not appear. Usually, under these conditions the temperature readings will show extreme errors.
C.) If battery checks okay, it is possible that the temperature sensor in the sensing head may have been damaged by dropping unit or unit may be out of calibration, due to severe exposure or abuse.
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PROBLEM NO. 5: PROCEDURE & EXPLANATION:
PROBLEM NO. 6: PROCEDURE & EXPLANATION: PROBLEM NO. 7: PROCEDURE & EXPLANATION:
D) Determine if sensor is still useful by following the calibration procedure given is Section VII.
E)
If fault not corrected, return to MMC for repair. Sensor or
integrated circuit chip may require replacement.
Liquid Crystal Display (LCD) does not function properly one or more segments stay on or off all the time producing strange figures.
Display contact may be corroded or dirty. Remove hub cover and associated P.C. Board by first removing six machine screws. Remove the three pushbutton switches and seal boot fasteners. P.C. board and associated display may now be separated from coverplate. Remove (LCD) display bezel (see DWG. B-2401-31) by first removing two machine screws and nuts. Carefully lift bezel and liquid crystal display from blue connector. Make sure that the long thin elastomer contact strips that fit into the top and bottom horizontals slots of the connector are not lost. Remove connector with associated contact strips exposing P.C. Board contacts. Use a good non-oil contact cleaner to clean P.C. Board contacts. If corroded or dirty, wipe contact (bottom side only) with cotton swab wetted with alcohol, being careful not to saturate LCD with fluid.
CAUTION ! Do not spray contact cleaner on LCD display or permanent damage may be incurred. Re-assemble in reverse order making sure elastomer contact strips are inserted properly in blue connector horizontal slots. Note that blue connector bottom pins fit into mating hose on P.C. Board for proper alignment. If above procedure does not cure problem then either display or integrated circuit A/D converter is at fault. Spare display can be substituted to isolate problem. Order from MMC together with new connector.
Display is damaged, permanently discolored broken.
Order new display and connector from MMC and follow procedure given in Problem No. 5 to replace.
Unit operates properly in temperature mode, however, when placed in ullage mode, horn does not sound in oil or in water, or sound is extremely weak.
Sonic sensor has probably been damaged by being dropped and replacement may be required. Check unit in a container of clean lube oil, and then in a container of water. If sensor does not respond per operating procedure, then sensor replacement is probably necessary. Return to factory.
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APPENDIX
A. MMC Warranty Statement B. EC-Type Examination Certificate C. Factory Mutual Approval Agreement, Certificate No. OFOH1.AX, Dated September 6, 1983 D. Lloyd’s Register, Certificate of Type Approval, Type D-2401-2, D-2401-2UI, D-2401-2UT
IMO Resolution MEPC.5XIII, Certificate No. SASP020006, E. Lloyd’s Register, Certificate of Type Approval, Type D-2401-2S, D-2401-2UIS, D-2401-2UTS
IMO Resolution MEPC.5XIII, Certificate No. SASP020007 F. BV European Council Directive 96/98 EC on Marine Equipment (M.E.D) EC Type
Certificate. H. BV European Council Directive 96/98 EC on Marine Equipment, as amended for Module
D production Quality Assurance I. United States Coast Guard, Certificate of Type Test J. Canadian Standards Associated, Certificate No. 0664340000, Dated September 19, 1994 K. Standards Association of Australia, Certificate No. Ex973, Dated November 1, 1989 L. ABS Certificate of Design Assessment (02-HS306701-PDA) M. Det Norske Veritas Type Approval Certificate (Certificate No. A-8408) N. Sira (QAN) Quality Assurance Notice, No. Sira 03 ATEX M251 O. Glossary of Approvals P. Temperature Conversion Chart Q. Guideline for Tape Repair R. List of Corrosive Chemicals S. List of Drawings
Page Number 19 20-23 24
25
26
27
28 29 30 31 32-33 34-37 38-39 40 41 42-43 44 45
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WARRANTY
MMC SONIC ULLAGE, INTERFACE, TEMPERATURE & TRIPLE FUNCTION TAPES:
The seller, MMC or its licensed agents, fully warrants equipment of it manufacture against defects in materials or workmanship for a period of one year from the date of shipment. No other warranty period, in excess of one year, may be expressed or implied by sub-agents or others, unless authorized in writing by MMC. The liability of the seller under this warranty is limited, at seller’s option, solely to repair or replace with equivalent equipment.
The seller, upon the expiration of the warranty period, has the option to apply a limited credit, not to exceed the original equipment sales price, toward the purchase of a new piece of equipment, if returned equipment is beyond reasonable repair. In any event, non-warranty repair charges will be quoted to buyer, for authorization, before repair work commences.
In the Event of Returns for Warranty Repairs:
A. The buyer is to notify the seller in writing upon discovery of the defects.
B. Upon receipt of written authorization from the seller, the equipment is to be returned as directed, transportation prepaid by the buyer.
C. Buyer is to disclose the use of this product within hazardous chemical substances. It is the responsibility of the buyer to clean or decontaminate this product before returning for repairs. Buyer’s refusal will void repair warranty at seller’s option.
D. If seller’s examination of such equipment disclosed to his satisfaction that defects were not caused by negligence, misuse, improper installation, accident or unauthorized repair or alteration by the buyer, repairs will be immediately affected.
E. Buyer is to provide shipping instructions for the return, including mode of transportation.
This warranty does not include mechanical parts failure due to wear or corrosion from normal usage, nor does it cover limited life electrical components, or elastomer seals.
This warranty is in lieu of all other warranties, expressed or implied, including that implied of fitness for a particular purpose to the original purchaser or to any other person. Seller shall not be liable for consequential damages of any kind.
IMPORTANT:
The equipment has been certified as intrinsically safe instrument for only those classes or categories of hazardous areas so stated on the equipment label, bearing the mark of the applicable approval agency. No other usage is implied or otherwise authorized.
Unauthorized repair or component replacement by the user, will void this warranty, and may affect the intrinsic safety of the equipment.
JANUARY 2000
PAGE 19
STANDARDS ASSOCIATION OF AUSTRALIA
Incorporated by Royal Charter STANDARDS HOUSE, 80 ARTHUR STREET, NORTH SYDNEY, N.S.W.
EXPLOSION PROTECTED ELECTRICAL EQUIPMENT CERTIFICATE OF COMPLIANCE
Certificate Number: Ex 973
This certificate is issued for the electrical equipment: Ullage Interface Temperature Probe Model D-2401-2
Submitted for Certification by: MMC International Corporation 60 Inip Drive INWOOD L.I. NEW YORK 11696 USA
and Manufactured by; MMC International Corporation
This electrical equipment and any acceptable variation thereto is specified in the Schedule or Schedules attached hereto and in the documents referred to therein. This certifies that the equipment described has been found to comply with AS 2380.7-1987.
TYPE OF PROTECTION: Ex ia IIB T5 Zone 0 This certificate is granted subject to the conditions as set out in Standards Australia Miscellaneous Publication MP42 and any additional conditions as may be prescribed by Standards Australia.
Test Report No; FM: J.I. OP3QO.AX
File: P/3: 88121/M145
Date of Issue; 11 January 1989
Remarks; This page Is re-issued to correct an omission in the description of the equipment.
Page 1 of 2 (Issue 2)
This document shall not be reproduced except in full. This certificate remains the property of the Standards Association of Australia and must be returned to the Association in the event of it being revoked.
P31
Director–Administration & Approvals Standards Association of Australia
Page 37
P 38
P39
GLOSSARY OF APPROVALS
MAJOR APPROVAL STANDARDS & GOVERNMENT SPECIFICATIONS ADOPTED BY MMC INTERNATIONAL CORP. FOR
CERTIFICATION, MANUFACTURE, INSPECTION, CALIBRATION AND TESTING
BASEEFA CSA EECS FM SAA
EECS USCG
ABS CCS DNV LLOYD’S NKK RINA BV
FEDERAL NIST API ASTM
FM EECS
CSA OSHA BV DNV CCS
INTRINSICALLY SAFE APPROVALS
British Approval Service for Electrical Equipment in Flammable Atmospheres Canadian Standards Association Electrical Equipment Certification Service (U.K.), (License NO. 0685) Factory Mutual Research (USA) Standards Association of Australia
GOVERNMENT REGULATORY BODIES APPROVALS
Electrical Equipment Certification Service (U.K.) United States Coast Guard
INDUSTRY RECOGNIZED INSPECTION BODIES APPROVALS
American Bureau of Shipping China Classification Society Det Norske Veritas (Norway) Lloyd’s of London (U.K.) Nippon Kaiji Kyokai (Japan) Registro Italiano Navale (Italy) Bureau of Veritas (M.E.D.), (Approval 07373/** EC)
GAUGING TAPE AND OTHER MEASUREMENT SPECIFICATION
United States Government Specification #GGG-T-106E National Institute of Standards & Technology Test #255610 American Petroleum Institute (Partial Adaptation) American Society for Testing Materials
PERIODIC FACTORY INSPECTIONS BY REGULATORY BODIES
Factory Mutual performs quarterly inspection for both FM and SAA Performs annual inspections for BASEEFA for equipment approval and also for ISO 9002 Standards compliance, Coupled with EECS additional requirements per their “Quality Assessment Schedule”, Issue 2, 1994 CSA Performs annual inspection OSHA performs annual inspections (U.S. Government) Performs annual inspections Performs annual inspections Performs annual inspections
Page 40
TEMPERATURE CONVERSION CHART
°C = 5/9 (°F-32) °F = (9/5°C)+32 Kelvin = °C +273.15 Rankine = °F +459.67
Table Example: To Convert 1000°C to °F look up 1000 read left To Convert 1000°F to °C look up 1000 read right
To °F -0.4 +3.2 +6.8 +10.4 +17.6 +21.2 +24.8 +32.0 +35.6 +39.2 +42.8 +46.4 +50.0 +53.6 +57.2 +60.8 +64.4 +68.0 +71.6 +75.2 +78.8 +82.4 +86.0 +89.6 +93.2 +96.8 +100.4 +104.0 107.6 111.2 114.2 118.4 122.0 125.6 129.2 132.8 136.4 140.0 143.6 147.2 150.8 154.4 158.0 161.6
From -18 -16 -15 -12 -8 -6 -4 +0 +2 +4 +6 +8 +10 +12 +14 +16 +18 +20 +22 +24 +26 +28 +30 +32 +24 +36 +38 +40 42 44 46 48 50 52 54 56 58 60 62 64 66 68 70 72
to °C -27.78 -26.67 25.56 -23.33 -22.22 -21.11 -20.00 -17.78 -16.67 -15.56 -14.44 -13.33 -12.22 -11.11 -10.00 -8.89 -7.78 -6.67 -5.56 -4.44 -3.33 -2.22 -1.11 0.00 +1.11 +2.22 +3.33 +4.44 5.56 6.67 7.78 8.89 10.00 11.11 12.22 13.33 14.44 15.56 16.67 17.78 18.89 20.00 21.11 22.22
to °F 165.2 168.8 172.4 176.0 179.6 183.2 186.8 190.4 194.0 197.6 201.2 204.8 208.4 212.0 215.6 219.2 222.8 226.4 230.0 233.6 237.2 240.8 244.4 248.0 251.6 255.2 258.8 262.4 266.0 269.6 273.2 276.8 280.4 284.0 287.6 291.2 294.8 298.4 302.0 305.6 309.2 312.8 316.4 320.0
From 74 76 78 80 82 84 86 88 90 92 94 96 98 100 102 104 106 108 110 112 114 116 118 120 122 124 126 128 130 132 134 136 138 140 142 144 146 148 150 152 154 156 158 160
to °C 23.33 24.44 25.56 26.67 27.78 28.89 30.00 31.11 32.22 33.33 34.44 35.56 36.67 37.78 38.89 40.00 41.11 42.22 43.33 44.44 45.56 46.67 47.78 48.89 50.00 51.11 52.22 53.33 54.44 55.56 56.67 57.78 58.89 60.00 61.11 62.22 63.33 64.44 65.56 66.67 67.78 68.89 70.00 71.11
to °F 323.6 327.2 330.8 334.4 338.0 341.6 345.2 348.8 352.4 356.0 359.6 363.2 366.8 370.4 374.0 377.6 381.2 384.8 388.4 392.0 395.6 399.2 402.8 406.4 410.0 413.6 435.2 438.8 442.4 446.0 449.6 453.2 456.8 460.4 464.0 467.6 471.2 474.8 478.4 482.0 485.6 492.8 496.4 500.0
From 162 164 166 168 170 172 174 176 178 180 182 184 186 188 190 192 194 196 198 200 202 204 206 208 210 212 214 216 218 220 222 224 226 228 230 232 234 236 238 240 242 244 246 248
to °C 72.22 73.33 74.44 75.56 76.67 77.78 78.89 80.00 81.11 82.22 83.33 84.44 85.56 86.67 87.78 88.89 90.00 91.11 92.22 93.33 94.44 95.56 96.67 97.78 98.89 100.00 101.11 102.22 103.33 104.44 105.56 106.67 107.78 108.89 110.00 111.11 112.22 113.33 114.44 115.56 116.67 117.78 118.89 120.00
Page 41
GUIDELINE FOR TAPE REPAIR
The MMC sonic Trimode tape is verified as Intrinsically Safe by BASEEFA (British Approvals Service for Electrical Equipment in flammable atmospheres) in the United Kingdom.
In order to maintain the validity of the approval, tape units can be repaired only by MMC or our authorized guarantee repair offices approved by FM, BASEEFA, CSA, SAA and/or NKK. We can not offer that approval; it must be given by the approval agency.
To maintain our agreement with the above mentioned approval agencies and yet accommodate our customers as much as possible, we have developed three sets of modules, which can be purchased as units and installed by the owners of tapes. However, we must know the serial number of the tapes involved in order to maintain our records properly.
The Modules Developed are:
COMPLETE HUB ASSEMBLY, Consisting of P.C. Board with ancillary components, (without battery) faceplate, nameplate, gasket and battery connection cap (approval agency and temperature scale °C or °F to be specified by customer when ordering.
TAPE AND SENSOR ASSEMBLY, Consisting of Triple sensor, P.C. Board, screw and tape and header assembly. (Tape length and type graduation to be specified by customer when ordering).
TAPE WIPER ASSEMBLY, Consisting of wiper blades, ON/OFF Knob, mounting plate and screws.
At the present time, the following is a list of our guarantee repair offices throughout the world.
U.S.A.
MMC INTERNATIONAL CORP. – HEADQUARTERS 60 Inip Drive Inwood, New York 11096 Telephone: 718-327-3430 Facsimile: 516-371-3134
ENGLAND
MMC (EUROPE) LTD. South Nelson Road South Nelson Industrial Estate Cramlington, Northumberland NE23 9WF Telephone: 0670-738111 Facsimile: 0670-738789
USA
HYDRAULIC * AUTOMATION CONTROLS INC CONTROLS INC 806 W. 14th Street Long Beach CA 90813 Telephone: 562-435-3144 Facsimile: 562-435-2266
USA
MGM MARINE, INC 5901 Bayway Drive Baytown Texas 77520 Telephone: 281-424-3587/ 800-985-5464 Facsimile: 281-424-874
JAPAN
MMC (ASIA) LTD. 7-7, 2-Chome, Kotonoo-Cho Chuo-Ku, Kobe 651 Japan Telephone: 078-251-1033 Facsimile: 078-252-0265
Continued on next page
Page 42
SINGAPORE
BOND INSTRUMENTATION (S) PTE. LTD. 8 Gul Street 3 Singapore 2262 Telephone: 65-861-4279, 861-6749 Facsimile: 65-862-4062
AUSTRALIA
PC MAXWELL & ASSOCIATES 15 Ocean View Avenue Red Hill South Victoria 3937 Australia Telephone: 059-89-2762 Facsimile: 059-89-2700
NETHERLANDS
SGS NEDER LAND BV Puntweg 4 3208 LD SIJKENISSE BLGD 31 The Netherlands Telephone: 00-31-181-693495 Facsimile: 00-31-181-693558
U.A.E
HAVEN INSTRUMENTATION (L.L.C) PO BOX 51793 Al Jadaf Dubai, U.A.E Telephone: 00-9714-3241535 Facsimile: 00-9714-3243585
ITALY
SET MAR SAS 2/A Vico Boggiano 16155 Genova Italy Telephone: 00-39-010-6989967 Facsimile: 00-39-010-6989971
RUSSIA
I.M.S 4TH Tverskay-Ymskaya ST 14-3, Apt. 41 12504447 Moscow, Russia Telephone: 00-7-095-2514305 Facsimile: 00-7-095-9733528
U.A.E
TOTAL AUTOMATION MIDDLE EAST (L.L.C) P.O. BOX 37256 DUBAI, U.A.E Telephone: 00-9714-3475678 Facsimile: 00-9714-3471615
FRANCE
ITS CALEB BRETT FRANCE 2, Allee Thomas Edison 13500 Martigues France Telephone: 00-39-010-6989967 Facsimile: 00-39-010-6989971
Please note, repairs carried out in any unauthorized repair facility will automatically void the guarantee. These repair procedures are in accordance with approval agencies directions for intrinsically safe devices.
For addition service centers in your area, please our website at http://www.mmcintl.com
Page 43
LIST OF CHEMICALS
The following list of chemicals, although not all-inclusive, are known to attack PES, the material from which a portion of the sonic liquid level sensor is made.
Prolonged submergence of the sensor should be avoided.
After submergence in any of these chemicals, a through cleaning of the sensor head should be conducted to prolong sensor life.
* ACETALDEHYDE – CH3CHO
* ETHYL ACETATE – CH3COOC2H5
* ACETONE – CH3CHOH3
* ETHYLENE GLYCOL – HOC3H4OH
* ANILINE – C6H5NH2
* METHYL ETHYL KETONE – C2H5COCH3
BENZALDEHYDE – C6H5CL
* METHYLENE CHLORIDE – CH2CL2
CHLOROBENZENE – C6H5CL
NITRO BENZENE – C6H5NO2
CRESOL – CH3C6H4OH
* PHENOL – C6H5OH
* CYCLOHEXANONE – C6H10O
* PYRDINE – C5H5N
DICHLOROBENZENE – C6H4CL2
TOLUENE – C6H5CH2
1,2 DICHLORETHANE – CH2CLCH2CL
TRICLOROETHYLENE – CLCH:CCL2
*These chemicals are known to be water soluble, ranging from very to slightly soluble. While this information is, it will also make interface readings less accurate. In such case, good interface readings will depend upon the relative specific gravity’s involved. In the extreme case of dissolved water within a cargo, and upon ullage gauging of these chemicals, a beeping tone will be heard instead of the normal steady horn tone. This sensor response should not be interpreted as a malfunctioning unit.
Page 44
LIST OF DRAWINGS “RESTRICTED TAPE”
DRAWING NUMBER REV. DESCRIPTION
B-2401-31
A
B-2401-72B A
D-2562-1FRL B
S-2300-1
D
P. C. Board Component Placement & LCD Assembly Sub-Assembly, Hub Coverplate and P. C. Board) Factory Mutual & BASEEFA Restricted Trimode Tape Assembly for use with Vapor Control Valve Typical Installation Criteria for Zero Ullaging, MMC Vapor Control Valves
-+
Documents / Resources
 |
MMC D-2401-2 Portable Gauging Tapes [pdf] Installation Guide D-2401-2 Portable Gauging Tapes, D-2401-2, Portable Gauging Tapes, Gauging Tapes |