INSTRUCTION MANUAL - Calright Instruments
Contents
1. D INSTRUCTION MANUAL MCPYA A aaa A A TIN r YY Wl A C YOLT OHM AMMETER 50 60 Hz 1 800 547 5740 Fax 503 643 6322 www ueitest com email info ueitest com Introduction The MCP9A measures Amps Volts and Ohms on its rotating drum analog scale unlike other analog meters that make measurements difficult to read on their decreasing scales the drum brings each scale up front and allows you to view any reading with high resolution and increased accuracy Features include 9 ranges 300 Amps AC 600 Volts AC e Resistance to 1000 ohms e Color coded high res scale plate e Pointer lock switch data hold 1 1 2 jaw capacity Safety Notes Before using this meter read all safety information carefully In this manual the word WARNING is used to indicate conditions or actions that may pose physical hazards to the user The word CAUTION is used to indicate conditions or actions that may damage this instrument Always follow industry standard safety practices including protective clothing gloves and safety glasses when appropriate Do not attempt to measure any voltage that exceeds the categorybased rating of this meter Do not attempt to use this meter if either the meter or the test leads have been damaged Turn it in for repair at a qualified repair facility Ensure meter leads are fully seated by making a quick continuity check of the leads prior to making voltage measurem2. N warnine Repair and service of this instrument is to be performed by qualified personnel only Improper repair or service could result in physical degradation of the meter This could alter the protection from electrical shock and personal injury this meter provides to the operator Perform only those maintenance tasks that you are qualified to do These guidelines will help you attain long and reliable service from your meter e Calibrate your meter annually to ensure it meets original performance specifications Keep your meter dry If it gets wet wipe dry immediately Liquids can degrade electronic circuits e Whenever practical keep the meter away from dust and dirt that can cause premature wear Although your meter is built to withstand the rigors of daily use it can be damaged by severe impacts Use reasonable caution when using and storing the meter Cleaning Periodically clean your meter s case using a damp cloth DO NOT use abrasive flammable liquids cleaning solvents or strong detergents as they may damage the finish impair safety or affect the reliability of the structural components Clean the input terminals as follows 1 Turn the meter off and remove all test leads 2 Shake out any dirt that may be in the terminals 3 Soak a new swab with alcohol and work the swab around in each terminal Battery Replacement The purpose of the internal 1 5 V size AA battery is to supply power tot he circui
3. e Volt range When in doubt always use the highest Voltrange first The switch can always be set to a lower range for a more precise reading AC voltage measurements are made on the red Volt scales Insert the red and black test leads into the COM and VOLT input jacks The test leads may be locked in position by rotating them to the right clockwise Connect the two test leads to the circuit under test Measuring Resistance A WARNING Remove all power to the circuit under test when making resistance measurements If any voltage Is present in the test circuit an erroneous reading will result and the MCP9A fuse may open Connect the black test lead to the COM jack and the green test lead to the OHMS jack The OHMS jack has an internal switch so be sure that the green test lead is inserted fully into the jack Touch the free ends of the test leads together The pointer will swing to the right hand side of the scale Adjust the OHM ADJ control until the pointer is set on the green numeral 0 NOTE If this adjustment cannot be made refer to the MAINTENANCE section Re zero the MCP9A each time that the tester is used for making resistance measurements To make the resistance measurement connect the free ends of the test leads across the element to be measured The measured resistance value will be the green numeral indicated on the OHMS scale MCP9A MAN Maintenance Periodic Service A
4. ents Keep your fingers away from the test lead s metal probe contacts when making measurements Always grip the leads behind the finger guards molded into the probes Use a current clamp adapter when measuring current that may exceed 10 amps See the accessories in UEr s full line catalog Do not open the meter to replace batteries or fuses while the probes are connected A WARNING Exceeding the specified limits of this meter is dangerous and can expose the user to serious or possibly fatal injury e Voltages above 60 volts DC or 25 volts AC may constitute a serious shock hazard Always turn off power to a circuit or assembly under test before cutting unsoldering or breaking the current path Even small amounts of current can be dangerous Always disconnect the live test lead before disconnecting the common test lead from a circuit In the event of electrical shock ALWAYS bring the victim to the emergency room for evaluation regardless of the victim s apparent recovery Electrical shock can cause an unstable heart rhythm that may need medical attention MCP9A MAN e Higher voltages and currents require greater awareness of physical safety hazards Before connecting the test leads turn off power to the circuit under test set the meter to the desired function and range connect the test leads to the meter first then to the circuit under test Reapply power If any of the following indications occur during testing turn o
5. est leads from acidently separating from the jacks during the taking of AC Voltage measurements 6 COM This jack located at the end of the MCP9A is common to either AC Volts or OHMS measurements 7 Volts This jack located at the end of the MCP9A is used for taking AC Voltage measurements 8 OHMS This jack located at the left side of the MCP9A is used for taking resistance measurements A switch is built into this jack which is operated when the green OHMS test lead is inserted Operating Instructions Measuring AC Current When measuring current always be sure the SELECTOR switch is set to the appropriate AMP range When in doubt always use the highest current range first The switch can always be reset to a lower range for a more precise reading AC current measurements are made on the black A MP scales Clamp the jaw the MCP9A around a single circuit wire NOTE Clamp only one wire at a time for measurement If two or more wires are clamped together the tester will not read If the measured value on the meter scale is less than the full scale value of the next lower range reset the SELECTOR switch to the lower range for a more accurate reading Slide POINTER LOCK switch toward the right to lock the pointer at its indicating point when readings must be made in a confined or difficult to read loation Measuring AC Voltage When measuring voltage be sure the SEL ECTOR switch is set to the appropriat
6. ff the power source to the circuit under test Arcing e Flame e Smoke Extreme Heat Smell of Burning Materials Discoloration or Melting of Components AN caution Do not attempt to remove the meter leads from the circuit under test The leads the meter or the circuit under test may have degraded to the point that they no longer provide protection from the voltage and current applied If any of these erroneous readings are observed disconnect power immediately and recheck all settings and connections Controls and Indicators 1 Selector Switch Is used to select the circuit function and range It is good practice to start with the highest range setting of the SELECTOR switch for a particular function if the magnitude of the function is unknown 2 OHM ADJ Used only on the OHMS function The purpose of this control is to calibrate the MCP9A to compensate for changes in the voltage of the internal 1 5 V battery 3 Lock Switch Is located at the upper left side of the scale plate It Is used to secure the pointer at the last reading when measurements must be made in a confined or difficult to read location 4 Mechanical Zero Adjust Is a plastic screw located on the meter face just beneath the LOCK switch This adjustment is used to set the pointer to the zero index mark at the left side of the scale plate 5 Input Jacks Are a special twist lock banana type The twist lock feature prevents the t
7. lar purpose are limited to the express warranty UEi shall not be liable for loss of use of the instrument or other incidental or consequential damages expenses or economic loss or for any claim or claims for such damage expenses or economic loss A purchase receipt or other proof of original purchase date will be required before warranty repairs will be rendered Instruments out of warra ntywill be repaired when repairable for a service charge Return the unit postage paid and insured to 1 800 547 5740 FAX 503 643 6322 www ueitest com Email info ueitest com This warranty gives you specific legal rights You may also have other rights which vary from State to state PLEASE to RECYCLE Copyright 2007 UEi MCP9A MAN 1 07
8. t under test while making resistance measurements Eventually the battery will age to the point where it will not be possible to zero the meter with the OHM ADJ control When this happens the battery should be replaced Observe the proper battery polarity when replacing the battery It is recommended that the battery be removed if the MCP9A is not to be used for a long period of time Remove the screws in the rear of the case for access to the battery AN warnine Disconnect the test leads from the circuit under test and from the meter prior to removing or installing batteries AN warnine Under no circumstances should you expose batteries to extreme heat or fire as they may explode and cause injury P 2 Fuse Replacement The fuse Is in series with the OHM input jack If this fuse is open the OHM circuit will not work When replacing the fuse be sure to replace it with a fuse of the same current rating and internal resistance The use of a fuse with a different internal resistance may cause the accuracy of thee OHMS scale to be off Remove the screws in the rear of the case for access to the fuse Fuse should be 0 3 Amp 0 9 OHM resistance Mechanical Zero Adjust The pointer is set to register 0 at the left edge of the scale when there Is no input to the MCP9A and it Is laying face up on a flat surface If the pointer does not register 0 it may be reset to that position by carefully adjusting the black screw in
9. the meter face just below the LOCK switch Specifications Ranges AC Vols Accuracy AC Vols OHMS 3 of scale length General Battery One 1 5 V size AA NEDA 15D battery supplied Fuse 0 3 Amp 0 9 OHM Size 8 1 8 x 3 1 8 x 1 1 2 206 mm x 79 mm x 38 mm Optional Accessories Optional Battery 1 5V size AA ABI FUSE 05 AID lada icc eerie inated ies amen AF45 Test leads ACV twist lock pr ATL30 Test leads OHMS twist lock ea ATL35 Alligator clip adapters insulated pr AAC Plug in line splitter _ ASL1 MCP9A MAN P 3 MCP9A Clamp On Meter Limited Warranty The MCP9A Is warranted to be free from defects in materials and workmanship for a period of three years from the date of purchase If within the warranty period your instrument should become inoperative from such defects the unit will be repaired or replaced at UEi s option This warranty covers normal use and does not cover damage which occurs in shipment or failure which results from alteration tampering accident misuse abuse neglect or improper maintenance Batteries and consequential damage resulting from failed batteries are not covered by warranty Any implied warranties including but not limited to implied warranties of merchantability and fitness for a particu
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