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ACL 800 Operation Manual
ACL 800 MEGOHMMETER
Meter is warranted for one year from the date of purchase on parts and labor.
Calibration is recommended every twelve months.
NOTE: THIS MANUAL IS NOT TO BE
ACL Incorporated
th
840 W. 49
Place
Chicago, IL 60609 USA
OPERATION MANUAL
SEPARATED FROM METER!
Page 1 of 13
Rev. 07/26/22 MKB
Tel: 847‐981‐9212
info@aclstaticide.com
www.aclstaticide.com
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Summary of Contents for ACL 800C
- Page 1 ACL 800 Operation Manual Rev. 07/26/22 MKB ACL 800 MEGOHMMETER OPERATION MANUAL Meter is warranted for one year from the date of purchase on parts and labor. Calibration is recommended every twelve months. NOTE: THIS MANUAL IS NOT TO BE SEPARATED FROM METER! ACL Incorporated Tel: 847‐981‐9212 840 W. 49 Place Page 1 of 13 info@aclstaticide.com Chicago, IL 60609 USA www.aclstaticide.com...
- Page 2 ACL 800 Operation Manual Rev. 07/26/22 MKB ACL 800 Megohmmeter The ACL 800 Megohmmeter kit measures surface resistivity, resistance, temperature and humidity. It is designed to test conductive, dissipative, and insulative surfaces for electrical resistivity/resistance according to EOS/ESD, CECC, ANSI, ASTM and UL test procedures. The internal parallel electrodes comply with DIN EN 100 015/1 and ASTM D257. The 5‐ lb electrodes can be externally connected for tests according to IEC 61340‐4‐1, ANSI/ESDA S4.1 & ANSI/ESDA S7.1. Optional concentric ring probe will allow compliance to ANSI/ESDA S11.11. ACL 800 Megohmmeter Includes: * Tester * Two 5‐lb probes * One ground cord * Two accordion cables (monaural to banana) * 110‐volt power adapter (in the US only) * 9‐volt battery * Foam‐lined carrying case * Certificate of calibration Limits * Resistivity: 10 ‐10 ohms/sq. * Resistance: 10 ‐10 ohms * Relative Humidity: 10% ‐ 90% * Temperature: 32°F to 100°F or 0°C – 37.7°C if Celsius model was purchased * Measuring voltage: 10v and 100v ACL Incorporated Tel: 847‐981‐9212 840 W. 49 Place ...
- Page 3 ACL 800 Operation Manual Rev. 07/26/22 MKB INTRODUCTION The ACL 800 Megohmmeter is a dependable and easy‐to‐use audit kit for conductive and dissipative surfaces. This meter is designed to be used in all facets of material production including engineering, maintenance, quality control, incoming inspection, manufacturing, research, or sales departments for the testing of anti‐static mats, floor finishes, paints, wrist straps, smocks, footwear, bags and containers. When using the built‐in electrodes, the meter’s test values for surface resistivity are in ohms per square. When using the external 5‐lb electrodes, the meter’s test values for resistance are in ohms (although they are displayed in ohms/sq.). ECADE CALE 3 = 1 kilohm 4 = 10 kilohms 5 = 100 kilohms 6 = 1 meg ohm 7 = 10 meg ohms 8 = 100 meg ohms 9 ...
- Page 4 ACL 800 Operation Manual Rev. 07/26/22 MKB OTE ABOUT OLTAGE In previous years, those desiring to measure resistivity or resistance followed the ASTM D264, ASTM 991, NFPA 56A or NFPA 99 test standards. These procedures required one to test at either 500 or 1000 volts. This caused concern regarding safety to the person performing the tests. The ESDA standardized the test procedures so that lower voltages could be used within specific ranges. The ACL 800 meter uses a 9‐volt battery. Some meters with 9‐volt batteries do not give the accuracy needed to perform the test, especially at values higher than 10 . The ACL 800 is built with a transformer that converts the 9‐volt charge from the battery to 10 volts or 100 volts (whichever value is selected). The meter applies a constant charge over the complete voltage range. Accuracy depends on applied voltage, temperature, and humidity. EMPERATURE AND UMIDITY Humidity and temperature affect the electrical properties of the material being tested. The combination of low humidity and low temperature will give the highest electrical resistance results and slowest dissipation times. At high humidity, a thin layer of water is condensed on or absorbed into the material being tested. This is true of hydroscopic additives that are incorporated into a material in order to increase the electrical conductivity. These additives will allow moisture to be absorbed into the materials to which they are added. At elevated temperatures, the mobility of free electrons increases, thereby also increasing a material’s conductivity. This is especially true for carbon black, metallic oxides, metals, and other substances. When the material is at a lower temperature, built‐in stresses occur which may increase the resistance due to increased distance between the conductive additives. Thus, humidity and temperature must be known. ...
- Page 5 ACL 800 Operation Manual Rev. 07/26/22 MKB ALIBRATION Calibration is recommended annually. The ACL 800 meter comes with a NIST certificate when ordered. After one year the meters can be sent back to ACL Inc. for a new NIST certificate for a lab fee or it can be sent to a certified calibration lab (see page 11 for instructions). The meters also come with a CE mark approval. MEASURING WITH INTERNAL ELECTRODES The parallel resistivity probe method complies with ASTM D257. It is used to give fast electrical resistivity measurements on flat homogeneous materials. It may be used on multilayered materials, but this should be noted along with the temperature and humidity values on the data report. When the measurement is taken between the tester’s two conductive rubber rails under the tester, the tester will indicate the surface resistivity of the material being tested. A. Prior to testing, make certain that surfaces to be tested are clean and free of contaminants. B. Allow the meter to acclimate to the atmosphere in which it will be used. Adjustment to new environmental conditions may take as long as a half hour. C. Place the meter on the desired surface to be tested. D. Move switch to desired test voltage position, either 10 or 100 volts, depending on the target range of the material. E. Press and hold the test button with approximately five pounds of applied force. ...
- Page 6 ACL 800 Operation Manual Rev. 07/26/22 MKB MEASURING WITH EXTERNAL ELECTRODES When the measurement is taken using the 5‐lb external probes, the tester will indicate the resistance of the material being tested once the button is pressed (value is in ohms, though the display says ohms/sq). When a probe is plugged into the appropriate socket, the associated internal electrode is disengaged. ▲ ▲ ▲ ▲ 12VDC External Electrodes By connecting these probes to the ACL 800’s sockets it is possible to measure Point to Point (RTT) Resistance, Surface to Ground (RTG), and Volume Resistance. Using these probes will allow compliancy with various standards including ANSI/ESDA S4.1 for Worksurface – Resistance Measurements, ANSI/ESDA S7.1 Resistive Characterization of Materials – Floor Materials. When auditing is finished, unplug the cables and store probes in the protective case. If cables are left in the tester, the jacks will lose their elasticity as shown below: ...
- Page 7 ACL 800 Operation Manual Rev. 07/26/22 MKB Measuring Resistance Point to Point (RTT) RTT measurements can be used for the evaluation of floors, chairs, carts, work surfaces and other ESD‐controlled materials and products. Procedures vary regarding sample preparation, probe preparation and spacing of the 5‐lb probes. Select and read the correct test procedure or standard for the desired measurement. Test procedures can be purchased from www.esda.org. A. Connect one end of each of the banana test leads into the sockets of the meter. Connect the other end of the test coil cords into the 5‐lb probes. A. Place both probes on the material according to test procedures or standard ...
- Page 8 ACL 800 Operation Manual Rev. 07/26/22 MKB N EXAMPLE OF MEASURING ON DISSIPATIVE FLOORING Taking routine measurements of tiles coated with dissipative floor finish is a key component of proper floor maintenance. Any problems that arise with the floor will be easily detected. Keeping a record of test results for temperature, humidity and electrical properties will provide a reference and will point toward a blueprint of traffic patterns on the floor. Good record keeping will ensure success when developing and maintaining a maintenance program. To get an average measurement of a floor, map out a 4’ x 4’ section and conduct five tests (one at a time) within the square. Conduct a test for each side of the square and a final test diagonally through the center as shown in the drawing below. Each RTT test utilizes the 5‐lb probes placed three feet apart (36 inches). Connect the test leads to the meter. Attach a 5‐lb probe to the end of each lead and place three feet apart as indicated above. Press and hold the “TEST” button on the ACL 800 meter until a value is displayed. RTT #1 ...
- Page 9 ACL 800 Operation Manual Rev. 07/26/22 MKB (RTG) EASURING ESISTANCE TO ROUND Resistance to ground measurements can be used for the evaluation of floors, chairs, carts, work surfaces and other ESD controlled materials and products. Keeping a record of test results for temperature, humidity and electrical properties will provide a reference. : N EXAMPLE OF MEASURING ON DISSIPATIVE FLOORING For Testing Resistance on Floors, S7.1 requires a minimum of five RTG tests per 5,000 sq. ft. Connect the leads for the external probes to the meter. ▲ ▲ ▲ ▲ When the cables have been plugged in 12VDC External Electrodes the appropriate sockets, the parallel probes under the meter disengage. Attach one lead to a 5‐lb probe and place probe on the floor that’s being tested. Attach the other lead to an alligator clip and connect to ground or a groundable point (RTGP). If using a ground adapter plug, plug the banana lead into the adaptor after the adapter is plugged into the receptacle. ...
- Page 10 ACL 800 Operation Manual Rev. 07/26/22 MKB : N EXAMPLE OF MEASURING ON DISSIPATIVE TABLE MATS A. To test RTG for a workstation, connect the first lead to the meter and to a 5‐lb probe. Place the probe on the work surface. Connect the second lead from the meter directly to a ground source. If connecting to a groundable point, the test is “resistance to groundable point” (RTGP) and not “resistance to ground” (RTG). Use the alligator clip if necessary. B. Press the “TEST” button and the value will be displayed on the LCD. When performing test do not touch lead wires or probe. Avoid overlapping of lead wires. This will ensure accurate readings. C. Resistance values are in ohms. Record temperature, humidity and resistance. 6 If the range of your work surface is 10 to 10 , measure at 100v. The EOS standard says 6 11 6 9 the dissipative range is 10 – 10 but commonly 10 – 10 is considered a pass. ...
- Page 11 ACL 800 Operation Manual Rev. 07/26/22 MKB To Ground Connect alligator clip to snap for RTGP ACL Incorporated Tel: 847‐981‐9212 840 W. 49 Place Page 11 of 13 info@aclstaticide.com Chicago, IL 60609 USA www.aclstaticide.com...
- Page 12 ACL 800 Operation Manual Rev. 07/26/22 MKB EASURING OLUME ESISTANCE Volume Resistance measures the electrical path through a material. A. Connect one end of each of the banana test leads into the sockets of the meter. Connect the other end of the test coil cords into the 5‐lb probes. B. Place sample material on a conductive metal plate (such as stainless steel). Place one of the 5‐lb probes on the material so that the material is sandwiched between the probe and metal plate. (See below) C. Place the second 5‐lb probe on the conductive metal plate. D. Press the “TEST” button and the value will be displayed on the LCD. Volume Resistance is in ohms‐cm. ...
- Page 13 ACL 800 Operation Manual Rev. 07/26/22 MKB CALIBRATION INSTRUCTIONS The ACL 800 meter is calibrated to be most accurate in the most widely‐used range (10 ‐10 ). The lab calibrates meters between 30 ‐ 40% RH at 65 ‐ 73°F. If you are using the meter in atmospheres different than above, it is strongly advised to recalibrate the meter to your conditions. 1. Purchase 1% 10 ‐10 ohm resistors, high‐accuracy relative humidity hygrometer, and high‐accuracy thermometer. 2. Open meter, being careful not to disturb or break the two wires connecting the power button to the circuit board. 3. Observe on the right lower side of the meter printed circuit board four calibration pots. 4. ALLOW THE METER TO EQUILIBRATE AND NORMALIZE IN THE ENVIRONMENT FOR 2 ...
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