{"product_id":"52240-a","title":"Mastercool 52240-A — Digital Clamp Meter 600A AC\/DC Multimeter with Data Hold \u0026 Peak Hold","description":"\u003ch2\u003eDigital Clamp Meter — Versatile Electrical Diagnostic Tool\u003c\/h2\u003e\u003cp\u003eMastercool's Digital Clamp Meter is a completely portable hand-held test instrument which provides versatile measuring capabilities. This unit is ideal for maintenance and inspection work on all types of electrical equipment. Essential for HVAC\/R technicians who need to diagnose electrical issues, measure current draw, and verify proper system operation.\u003c\/p\u003e\u003ch3\u003eComplete Kit Includes\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDigital Clamp Meter:\u003c\/strong\u003e 52240-A main unit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 Pair of Test Probes:\u003c\/strong\u003e For voltage and resistance measurements\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSoft Carry Case:\u003c\/strong\u003e Protective storage and transport\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e9V Battery:\u003c\/strong\u003e Ready to use out of the box\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eKey Features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAC Current Measurement:\u003c\/strong\u003e 10mA to 600A range\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAC Voltage:\u003c\/strong\u003e 100mV to 600V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDC Voltage:\u003c\/strong\u003e 1V to 600V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eResistance:\u003c\/strong\u003e 100mΩ to 20KΩ\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFrequency Count:\u003c\/strong\u003e 10Hz to 2KHz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContinuity Check:\u003c\/strong\u003e \u0026lt; 100Ω with audio tone\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiode Check:\u003c\/strong\u003e Forward or reverse testing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eData Hold Function:\u003c\/strong\u003e Freeze display for recording measurements\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePeak Hold Function:\u003c\/strong\u003e Capture peak values\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e40mm Conductor Diameter:\u003c\/strong\u003e Accommodates large cables\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAutomatic Polarity:\u003c\/strong\u003e Negative polarity indication\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSingle Range Switch:\u003c\/strong\u003e Easy operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOver Range Indication:\u003c\/strong\u003e Clear display when limits exceeded\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow Battery Warning:\u003c\/strong\u003e \"BT\" appears in last 20% of battery life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLong Battery Life:\u003c\/strong\u003e Up to 200 hours with alkaline battery\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e 52240-A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisplay:\u003c\/strong\u003e 3-1\/2 digit LCD (1999 count) with annunciators\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSampling Rate:\u003c\/strong\u003e 2.5 times per second\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConductor Diameter:\u003c\/strong\u003e 40mm maximum\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePolarity:\u003c\/strong\u003e Automatic \"–\" negative polarity indication\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRange Selection:\u003c\/strong\u003e All ranges measured by single range switch operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOver Range Indication:\u003c\/strong\u003e Highest digit of (1) or (-1) displayed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow Battery Indication:\u003c\/strong\u003e \"BT\" appears on display in last 20% of battery life\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery Life:\u003c\/strong\u003e Up to 200 hours with alkaline battery\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Requirements:\u003c\/strong\u003e Single 9V battery\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOperating Temperature:\u003c\/strong\u003e 0°C to 40°C (32°F to 104°F) below 80% RH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage Temperature:\u003c\/strong\u003e -10°C to 60°C (14°F to 140°F) below 80% RH\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e 208 x 65 x 31mm (8.2\" x 2.6\" x 1.3\")\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 308g (10.9 oz) including battery\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e 52240-A\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHS Code:\u003c\/strong\u003e 84189910\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eMeasurement Ranges\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eAC Current:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eRange: 10mA to 600A\u003c\/li\u003e\n\u003cli\u003eIdeal for measuring compressor current draw, fan motor current, and total system current\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eAC Voltage:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eRange: 100mV to 600V\u003c\/li\u003e\n\u003cli\u003eMeasure mains voltage, control voltage, and transformer outputs\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eDC Voltage:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eRange: 1V to 600V\u003c\/li\u003e\n\u003cli\u003eTest control circuits, sensors, and DC power supplies\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eResistance:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eRange: 100mΩ to 20KΩ\u003c\/li\u003e\n\u003cli\u003eCheck continuity, measure coil resistance, verify connections\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFrequency:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eRange: 10Hz to 2KHz\u003c\/li\u003e\n\u003cli\u003eVerify AC frequency and diagnose inverter outputs\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eApplications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eHVAC\/R compressor current measurement\u003c\/li\u003e\n\u003cli\u003eFan motor current testing\u003c\/li\u003e\n\u003cli\u003eElectrical troubleshooting and diagnostics\u003c\/li\u003e\n\u003cli\u003eMains voltage verification\u003c\/li\u003e\n\u003cli\u003eControl circuit testing\u003c\/li\u003e\n\u003cli\u003eContinuity checking\u003c\/li\u003e\n\u003cli\u003eResistance measurements\u003c\/li\u003e\n\u003cli\u003eFrequency verification\u003c\/li\u003e\n\u003cli\u003eDiode and component testing\u003c\/li\u003e\n\u003cli\u003eElectrical installation inspection\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhy Choose the 52240-A?\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile Measurements:\u003c\/strong\u003e AC\/DC voltage, AC current, resistance, frequency, continuity, diode test\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide Current Range:\u003c\/strong\u003e 10mA to 600A covers most HVAC\/R applications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e40mm Jaw Opening:\u003c\/strong\u003e Accommodates large cables and multiple conductors\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eData Hold:\u003c\/strong\u003e Freeze display for recording in difficult positions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePeak Hold:\u003c\/strong\u003e Capture inrush current and peak values\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAudio Continuity:\u003c\/strong\u003e Hands-free continuity testing with tone\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLong Battery Life:\u003c\/strong\u003e Up to 200 hours operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompact \u0026amp; Portable:\u003c\/strong\u003e Only 308g with protective carry case\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy to Read:\u003c\/strong\u003e Large LCD display with clear annunciators\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComplete Kit:\u003c\/strong\u003e Includes probes, case, and battery\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfessional Quality:\u003c\/strong\u003e Mastercool reliability\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003ePerfect For\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eHVAC\/R service technicians\u003c\/li\u003e\n\u003cli\u003eElectrical contractors\u003c\/li\u003e\n\u003cli\u003eMaintenance engineers\u003c\/li\u003e\n\u003cli\u003eCommercial refrigeration technicians\u003c\/li\u003e\n\u003cli\u003eAutomotive A\/C specialists\u003c\/li\u003e\n\u003cli\u003eWorkshop and field service operations\u003c\/li\u003e\n\u003cli\u003eElectrical troubleshooting and diagnostics\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCommon HVAC\/R Measurements\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eCompressor Current Draw:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eClamp around compressor power cable\u003c\/li\u003e\n\u003cli\u003eMeasure running current (RLA - Rated Load Amps)\u003c\/li\u003e\n\u003cli\u003eCompare to nameplate specifications\u003c\/li\u003e\n\u003cli\u003eHigh current indicates mechanical problems or electrical issues\u003c\/li\u003e\n\u003cli\u003eLow current may indicate refrigerant undercharge\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eFan Motor Current:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMeasure condenser fan and evaporator fan current\u003c\/li\u003e\n\u003cli\u003eVerify motors are operating within specifications\u003c\/li\u003e\n\u003cli\u003eDetect bearing wear or mechanical binding\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eTotal System Current:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMeasure total current draw at disconnect\u003c\/li\u003e\n\u003cli\u003eVerify system is within circuit breaker rating\u003c\/li\u003e\n\u003cli\u003eCalculate actual power consumption\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eControl Voltage:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eUse test probes to measure 24VAC control circuits\u003c\/li\u003e\n\u003cli\u003eVerify transformer output\u003c\/li\u003e\n\u003cli\u003eTest thermostat circuits\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eData Hold \u0026amp; Peak Hold Functions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eData Hold:\u003c\/strong\u003e Press the hold button to freeze the current reading on the display. Useful when taking measurements in awkward positions where the display is difficult to see, or when you need to record the value.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003ePeak Hold:\u003c\/strong\u003e Captures and displays the peak (maximum) value during a measurement period. Essential for measuring compressor inrush current or identifying intermittent electrical spikes.\u003c\/p\u003e\u003ch3\u003eContinuity Check with Audio Tone\u003c\/h3\u003e\u003cp\u003eThe continuity function provides an audible tone when resistance is below 100Ω, allowing hands-free continuity testing. Ideal for:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eVerifying wire connections\u003c\/li\u003e\n\u003cli\u003eTesting fuses and circuit breakers\u003c\/li\u003e\n\u003cli\u003eChecking switch contacts\u003c\/li\u003e\n\u003cli\u003eTracing circuits\u003c\/li\u003e\n\u003cli\u003eIdentifying short circuits\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSafety \u0026amp; Accuracy\u003c\/h3\u003e\u003cp\u003eAccuracies are ± (% reading + number of digits) at 23°C ± 5°C below 80% RH. Always observe proper electrical safety procedures when using this meter:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eNever exceed the maximum rated voltage or current\u003c\/li\u003e\n\u003cli\u003eEnsure proper insulation on test leads\u003c\/li\u003e\n\u003cli\u003eDe-energise circuits before making resistance measurements\u003c\/li\u003e\n\u003cli\u003eUse appropriate personal protective equipment\u003c\/li\u003e\n\u003cli\u003eFollow local electrical safety regulations\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDisplay Annunciators\u003c\/h3\u003e\u003cp\u003eThe LCD display includes the following indicators:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eP:\u003c\/strong\u003e Peak Hold mode active\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eH:\u003c\/strong\u003e Data Hold mode active\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e–:\u003c\/strong\u003e Negative polarity\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBT:\u003c\/strong\u003e Low battery warning (last 20% of battery life)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e~:\u003c\/strong\u003e AC measurement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eV:\u003c\/strong\u003e Voltage\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eA:\u003c\/strong\u003e Current (Amperes)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eΩ:\u003c\/strong\u003e Resistance (Ohms)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKΩ:\u003c\/strong\u003e Kilohms\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKHz:\u003c\/strong\u003e Kilohertz\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDecimal point:\u003c\/strong\u003e Indicates measurement scale\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eMaintenance\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBattery Replacement:\u003c\/strong\u003e Replace 9V battery when \"BT\" indicator appears\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStorage:\u003c\/strong\u003e Store in protective carry case in clean, dry environment\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCleaning:\u003c\/strong\u003e Wipe exterior with clean, dry cloth\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eJaw Cleaning:\u003c\/strong\u003e Keep clamp jaws clean for accurate current measurements\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTest Leads:\u003c\/strong\u003e Inspect test leads regularly for damage or wear\u003c\/li\u003e\n\u003c\/ul\u003e\u003chr\u003e\u003cp\u003e\u003cstrong\u003eProfessional Quality:\u003c\/strong\u003e Mastercool diagnostic tools are built to professional standards for accurate, reliable performance in demanding HVAC\/R and electrical service environments. The 52240-A Digital Clamp Meter provides versatile measuring capabilities essential for electrical troubleshooting and system diagnostics.\u003c\/p\u003e","brand":"Mastercool","offers":[{"title":"Default Title","offer_id":57164057772409,"sku":"52240-A","price":179.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/0158\/3481\/files\/47336_bb2b8122-a2d4-4a06-a5ac-22c9f06d6884.jpg?v=1777442464","url":"https:\/\/www.airconspares.com\/products\/52240-a","provider":"Airconspares.com","version":"1.0","type":"link"}