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MMC INTERNATIONAL CORP
OPERATING AND MAINTENANCE
INTRINSICALLY SAFE TRIPLE FUNCTION GAUGING TAPE
CLOSED (GAS-TIGHT) APPLICATIONS
LIQUID MEASURE OF ULLAGE, OIL/WATER INTERFACE
CSA/ATEX FOR CLASS I, DIVISION I, GROUPS C & D
LLOYD'S REGISTER, BUREAU VERITAS "MED" APPROVED
IN ACCORDANCE WITH IMO RESOLUTION MEPC.5 (XIII)
SEPTEMBER 2022
INSTRUCTIONS
FOR
AND TEMPERATURE
MODEL D-2401-2
TECHNICAL APPROVED BY:
AND
FOR OIL/WATER DETECTION
MMC INTERNATIONAL CORP.
60 INIP DRIVE
INWOOD, NEW YORK 11096
DRAWING FILE NO. A-2401-60AC REV A
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Summary of Contents for MMC D-2401-2
- Page 1 MMC INTERNATIONAL CORP OPERATING AND MAINTENANCE INSTRUCTIONS INTRINSICALLY SAFE TRIPLE FUNCTION GAUGING TAPE CLOSED (GAS-TIGHT) APPLICATIONS LIQUID MEASURE OF ULLAGE, OIL/WATER INTERFACE AND TEMPERATURE MODEL D-2401-2 TECHNICAL APPROVED BY: CSA/ATEX FOR CLASS I, DIVISION I, GROUPS C & D LLOYD’S REGISTER, BUREAU VERITAS “MED” APPROVED IN ACCORDANCE WITH IMO RESOLUTION MEPC.5 (XIII)
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Page 2: Table Of Contents
TABLE OF CONTENTS PAGE NUMBER NOTICES User instructions (in compliance with 2014/34/EU Directive, Annex II, 1.0.6) MMC Atex/IECEx definition GENERAL SPECIFICATIONS LINEAR ACCURACY SPECIFICATIONS SPECIAL FEATURES INTRODUCTION III. THEORY OF OPERATION 5, 6 REQUIRED CONDITIONS AND RECOMMENDATIONS FOR SAFE USAGE... - Page 3 CONTINUED ULLAGE/INTERFACE MEASUREMENTS 11, 12 TEMPERATURE MEASUREMENT PROCEDURE VII. CARE AND MAINTENANCE 13, 14 VIII. CALIBRATION PROCEDURE ULLAGE AND INTERFACE TEMPERATURE SENSOR CALIBRATION 15, 16 GAUGING TAPE REPLACEMENT 17, 18 HUB COVER AND P. C. BOARD REPLACEMENT FAULT FINDING 20, 21 XII.
- Page 4 As a further note to the above, the change in detection of a non-conductive product Ullage level as a steady tone to that of a conductive product’s ullage “beeping” tone, it is not to conclude that the sensor is malfunctioning. Best Regards, MMC International Corp.
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Page 5: User Instructions (In Compliance With 2014/34/Eu Directive, Annex Ii, 1.0.6)
User instructions (in compliance with ATEX 94/9/EC Directive, Annex II, 1.0.6) The following instructions apply to the Flexidip Portable Gauging Tape Type D-2401-2** covered by certificate number BAS 02ATEX1274X. The information contained herein shall be included with every batch of products sold, either as a separate sheet or incorporated as a discrete section in an instruction manual. -
Page 6: General
SECTION I 1. GENERAL 1.0 SPECIFICATIONS: Display Readable Temperature Range °F = -40° to 199.9°* *Reading Limit Due to 3-1/3 Digit LCD Display on °F Range °C = -40° to 150.0° Guaranteed Temperature Calibration Range 32°F to 190°F (0°C to 88°C) Accuracy Over Calibration Range ±0.5°F (±0.2°C) Accuracy Linear Measurements... -
Page 7: Linear Accuracy Specifications
+/- 0.01% of total tape length. GENERAL STATEMENT OF LINEAR ACCURACY MMC warrants that the above listed, newly produced equipment models, incorporating the listed basic gauging tape style and lengths, will perform to the stated system accuracy. Certification of accuracy for new equipment is available at an extra cost. Certification costs to standards... -
Page 8: Special Features
1.2 SPECIAL FEATURES: Conductive Tape Surface to Drain Off any Static Charge Grounding Cable with Heavy Alligator Clamp Dual-Purpose Spring-Loaded Tape Crank and Tape Position Lock Watertight Electronics Construction with Sealed Switches All Stainless-Steel Fasteners Nylon Coated Aluminum Reel Housing for Lightweight Portability Low Battery Display Indicator High Daylight Visibility with Liquid Crystal Display Push-Button Night Light... -
Page 9: Introduction
Section I. The MMC system utilizes a sensor suspended at the end of a fluoropolymer covered gauging tape wound on a reel assembly. The plastic covered steel gauging tape contains two isolated side conductors to carry the signal and power to the electronic circuit within the sensor barrel with the steel tape, provides the ground return. -
Page 10: Theory Of Operation
SECTION III THEORY OF OPERATION: Drawing S-2562-1TR illustrates the main components of the closed Temperature, Ullage, 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. - Page 11 caused to vary linearly with temperature. Span control (R18) is adjusted to provide a fixed reference voltage, to scale for either, 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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Page 12: Required Conditions And Recommendations For Safe Usage
SECTION IV REQUIRED CONDITIONS AND RECOMMENDATIONS 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 known to be generators of static electricity. Adhering to the specific safety directives of your company is the responsibility of the user. - Page 13 4.3.3 Clean oil distillates are, in general, known to be accumulators of static electricity due to their low conductivity (i.e., less than 100 Pica Siemens/Meter) and therefore may require relaxation periods of longer than 30 minutes before gauging is attempted. 4.3.4 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...
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Page 14: Gauging Tape Operation
SECTION V GAUGING TAPE OPERATION: TANK ENTRY: 5.1.1. The closed tape is installed into a vapor control valve in the same was as a restricted Flexi-Dip model. However, since the closed unit is sealed, an air cushion may occur, preventing the “Closed” tape from easily seating into the valve. -
Page 15: Tape Over-Wind And Other Conditions
Therefore, the use of the secondary sight port becomes an important part of normal operations. 5.4.3 When tape motion is stopped, the tape reading seen in the “secondary” sight port is exactly 300MM above “zero” ullage reference level. CAUTION: If the gauging tape reading seen at the secondary sight port is to be used as a recorded ullage, 300MM must be subtracted from reading to correct the “zero”... -
Page 16: Operation
SECTION VI OPERATION (Refer to Figure 1): FAMILIARIZATION WITH OPERATING CONTROLS AND FEATURES ON THE TAPE REEL HUB COVER PANEL: 6.1.1 Turn on power by momentarily depressing the “On/Off” 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. - Page 17 6.2.3 Make sure “LO BAT” does not show at left upper corner of display. 6.2.4 After grounding the assembly, insert the barrel of the gauging unit into the valve. Un-lock the tape reel lock by rotating the brass lock thumbscrew counterclockwise turning position hub seat.
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Page 18: Temperature Measurement Procedure
TEMPERATURE MEAUREMENT PROCEDURE: 6.3.1 If power is off, turn unit on by depressing “On/Off” push-button switch. Unit comes on in Ullage/Interface mode. Depress “Mode” push-button switch to select temperature. 6.3.2 If unit was on and in Ullage/Interface mode, simply press the “Mode” push-button to select temperature. - Page 19 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. Never permit tape and sensor head to unwind freely (control speed of descent by usage of a restraining force on crank).
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Page 20: Calibration Procedure
TEMPERATURE SENSOR CALIBRATION (Field Operation Only): 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. - Page 21 8.2.7 Repeat the above procedure in a hot bath. 8.2.8 Record: Sensor Hot Reading as = ph (as read from digital display) Record Reference: Thermometer Hot Reading as as = th 8.2.9 Calculate Zero Correction = tc (ph – pc) – pc th –...
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Page 22: Gauging Tape Replacement
The sensor is connected to the tape by 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 with anti-static properties. - Page 23 Remove the black wire screw and unplug the connector by squeezing the mating connector at the ribbed sides which are at opposite sides of the connector shell. Remove the flat head screw holding the outer reel plate to the reel core. Note that the spring- loaded anti-rotation arm cannot be seen pressing the outside layer of tape.
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Page 24: Hub Cover And P.c. Board Replacement
SECTION X 10.0 HUB COVER AND P.C. BOARD REPLACEMENT: To replace the turning drum hub cover and P.C. Board, follow the steps outlined below: 10.1 Remove the six machine screws from the hub cover, extract cover, gasket, and P.C. Board. 10.2 Unplug battery cap. -
Page 25: Fault Finding
SECTION XI 11.0 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 “On/Off” switch is depressed. PROCEDURE &... - Page 26 Determine if sensor is still useful by following the calibration procedure given sin Section VII. If fault is not corrected, return to MMC for repair. Sensor or integrated circuit chip may require replacement. PROBLEM NO. 5: Liquid Crystal Display (LCD) does not function properly one or more segments stay on or off all the time producing strange figures.
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Page 27: Appendix
APPENDIX PAGE NUMBER A. MMC Warranty Statemen t B. Glossary of Approvals C. Temperature Conversion Chart D. List of Corrosive Chemicals E. Guideline for Tape Repair F. List of Drawings... -
Page 28: Warranty
MMC. The liability of the seller under this warranty is limited, at seller’s option, solely to repair or replace with equivalent equipment. -
Page 29: Ivx. Glossary Of Approvals
GLOSSARY OF APPROVALS MAJOR APPORVAL STANDARDS & GOVERNEMNT SPECIFICATIONS ADOPTED BY MMC INTERNATIONAL CORP. FOR CERTIFICATION, MANUFACTURE, INSPECTION CALIBRATION AND TESTING INTRINSICALLY SAFE APPROVALS CAS (CAN.) Sira Certification Service Canadian Standards Association EECS Electrical Equipment Certification Service (U.K.) CSA (EUROPE) -
Page 30: Vx. Temperature Conversion Chart
TEMPERATURE CONVERSATION CHART °C = 5/9 (°F-32) °F = (9/5°C)+32 Table Example: Kelvin = °C +273.15 Rankine = °F +459.67 To Convert 1000°C to °F look up 1000 read left To Convert 1000°F to °C look up 1000 read right From From From... -
Page 31: List Of Chemicals
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 thorough cleaning of the sensor head should be conducted to prolong sensor life. -
Page 32: Guidelines For Tape Repair
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 guaranteed repair offices approved by SIRA, BV, DNV, BASEEFA, CSA. We cannot offer that approval;... -
Page 33: List Of Drawings
LIST OF DRAWINGS “CLOSED TAPE” DRAWING NUMBER REV. DESCRIPTION A-2562-146 Primary Sight Glass Assembly, Closed Hand Gauging A-2562-147 Secondary Sight Glass Assembly, Closed Hand Gauging B-2401-31 P.C. Board Component Placement & LCD Assembly B-2401-72 Sub-Assembly, Hub Cover plate and P.C. Board, ATEX B-2562-92 Tape Wiper to Barrel Assembly B-2562-269... - Page 37 BE PRESENT. SER. NO.. BE AWARE OF POTENTIAL ELECTRO-STACTIC CHARGING HAZARDS AFTER LOADING DISTILLED PETROLEUM PRODUCTS . SEE INSTRUCTION MANUAL THIS DEVICE MUST BE GROUNDED. SEE INSTRUCTION LABEL. MMC INTERNATIONAL CORP. INWOOD, NY MOD. D-2401-2 YEAR MANUF. GOLD FILED BOXES...
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