The PAC3760 plus II is a hand-held, battery-powered electrical safety testing unit designed for use by adequately trained personnel. It is manufactured by Seaward Electronic Limited, with representation in Australia by Emona Instruments Pty Ltd and in New Zealand by Electrotest Ltd. The device is guaranteed to be free from defects in material and workmanship for a period of 1 year from the date of delivery.
Function Description
The PAC3760 plus II is capable of performing a variety of electrical safety checks on different types of appliances and leads. Its primary function is to ensure that electrical equipment meets safety standards, specifically AS/NZS 3760:2010. The unit displays test progress, individual test results, and an overall pass/fail result for the appliance or cord under test.
The device can perform tests on:
- Class I appliances
- Class II appliances
- IEC mains leads
- Extension leads
- 10mA portable RCDs
- 30mA portable RCDs
- 3 Phase appliances (when used with a 3-Phase Adaptor)
Important Technical Specifications
The PAC3760 plus II conforms to IEC 61010-1:2001 for safety requirements and IEC 61326:2005 for EMC requirements, ensuring it operates within specification under these conditions.
Earth Continuity:
- Display Range: 0.01 - 19.99 ohms
- Measuring Range: 0.05 - 19.99 ohms
- Accuracy: ± (5% + 2 digits)
- Test Current: 200mA minimum
- Test Voltage: 9V nominal
- Pass/Fail Limit: 1.0 ohms (for Class I)
Insulation Resistance:
- Display Range: 0.01 - 19.99 Mohms
- Measuring Range: 0.10 - 19.99 Mohms
- Accuracy: ± (5% + 2 digits)
- Test Voltage: 500V VDC
- Test Current: >1mA into 500kΩ, <2mA into 2kΩ
- Pass/Fail Limit: 1.0 Mohm (for Class I and Class II)
Class I Leakage Current:
- Display Range: 0.15 - 9.99 mA
- Measuring Range: 0.25 - 9.99 mA
- Accuracy: ± (5% + 2 digits)
- Test Voltage: Mains Supply voltage
- Pass/Fail Limit: 5.00mA
Class II Leakage Current:
- Display Range: 0.10 - 5.00 mA
- Measuring Range: 0.10 - 5.00 mA
- Accuracy: ± (5% + 2 digits)
- Test Voltage: Mains Supply voltage
- Pass/Fail Limit: 1.00mA
Cord Test:
- Performs Earth continuity and Insulation resistance tests as above.
- Checks for Live and Neutral open circuit, short circuit, or reversed polarity.
RCD Tests:
- Measuring Range: 0 - 500 ms
- Test Current: ± 5%
- Time Indication: ± 2ms
- 10mA RCD Pass/Fail Limit: 40ms
- 30mA RCD Pass/Fail Limit: 300ms
Environmental Rating:
- IP Rating: IP40
- Operating Temperature Range: 0°C to 40°C (without moisture condensation)
- Storage Temperature Range: -25°C to 65°C
The unit is protected by a 20mm 10A 250V F Ceramic fuse.
Usage Features
The PAC3760 plus II features an LCD display (1) that shows test progress and results. It has several push buttons for initiating tests:
- Class I Test / Cord Sequence Button (2): Used for Class I appliance tests and mains cord tests.
- Class II Test Sequence Button (3): Used for Class II appliance tests.
- Leakage Test Sequence Button (4): Used for leakage tests.
- 10mA portable RCD Test Button (5): Initiates a 10mA RCD operating time test.
- 30mA portable RCD Test Button (6): Initiates a 30mA RCD operating time test.
- 3-Phase Test Sequence Button (7): Used for 3-Phase equipment tests (requires an adaptor).
The unit also includes a Test/Mains outlet socket (8), Mains inlet socket (9), IEC Test Connection (10), and an Earth Continuity Test Terminal (11).
Power ON/OFF: Press and hold the Class I and Class II test buttons simultaneously. The unit automatically switches off after approximately 3 minutes of inactivity.
Testing Procedures:
- Visual Inspection: All tests begin with a visual inspection of the appliance or lead as per AS/NZS 3760:2010 requirements.
- Class I Appliance Test: Involves Earth Continuity and Insulation tests. The appliance's ON/OFF switch must be in the ON position for insulation tests.
- Class I Appliance with Leakage Test: Requires the mains lead to be plugged into the PAC3760 plus II and a mains supply socket. It performs Earth Continuity and Leakage tests. The appliance's ON/OFF switch must be in the ON position.
- Class II Appliance Test: Involves an Insulation test. The appliance's ON/OFF switch must be in the ON position.
- Class II Appliance with Leakage Test: Similar to Class I leakage test but for Class II appliances, performing Insulation and Leakage tests.
- Mains Cord Test: Tests Earth Continuity, Insulation, and wiring (checking for open circuits, short circuits, or reversed connections in live and neutral conductors).
- Extension Lead Test: Tested similarly to an IEC lead, requiring a 0.5m IEC lead to connect the extension lead to the PAC3760 plus II.
- EPOD (Powerboard) Test: AS/NZS 3760 requires an earth resistance test for each outlet. Two procedures are available:
- Procedure A: Complete test sequence (earth, insulation, polarity) for every socket.
- Procedure B: Complete test sequence on the last socket, and only earth resistance tests on remaining sockets.
- EPOD/Extension Lead with MOV and/or RCDs Test: This sequence uses a leakage test instead of an insulation test to avoid triggering surge protectors (MOVs) or to power RCDs. Similar procedures (A and B) are available.
- 3-Phase Equipment Test: Requires an additional adaptor. The unit will display a warning if no adaptor is connected.
- RCD Operating Time Test: Measures the operating time of portable RCDs (10mA or 30mA). It alternates between 0° and 180° conditions, requiring two tests for comprehensive coverage.
Display Indicators:
- RPE icon: Indicates protective earth conductor resistance.
- RISO icon: Indicates insulation resistance.
- ILEAK icon: Indicates leakage current.
- LO LOAD: Displayed if the appliance load is too small for detection.
- HIGH LOAD: Displayed if the appliance load is too great (e.g., >10A), suggesting an insulation test instead of a leakage test to avoid blowing the fuse.
- LN, LE, NE enunciators: Indicate mains supply status (Correct, No mains, Earth fault, Live/neutral reversed).
- GOOd: Indicates correct wiring for cord tests.
- OPEn: Indicates open circuit in live or neutral conductor or blown fuse.
- Shrt: Indicates live and neutral conductors are shorted.
- CrOS: Indicates live and neutral connections are crossed.
Maintenance Features
- Cleaning: Clean only with a dry cloth; do not use solvents.
- Visual Inspection: Before each use, visually inspect all leads, connectors, and the case for damage or wear.
- Battery Check: The unit is powered by 6 AA cells. A low battery voltage is indicated by a flashing battery icon, and all test keys are disabled.
- Battery Replacement: To replace batteries, switch off the unit, disconnect all leads, place the unit face down, release the captive screw on the battery compartment cover, and remove the cover. Insert new Alkaline or NiMH batteries, ensuring correct polarity.
- Fuse Replacement: The unit is protected by a 20mm 10A 250V F Ceramic fuse. If the fuse blows, mains tests will be inhibited. Replacement involves switching off the unit, disconnecting all leads, and accessing the fuse holder in the battery compartment.
- Calibration: To maintain accuracy, the instrument must be recalibrated at regular intervals (recommended annually) by the manufacturer, Emona Instruments, or Electrotest Ltd.
- User Serviceable Parts: The PAC3760 plus II contains no user-serviceable parts. If an "Error" warning appears, contact Emona Instruments or Electrotest Ltd for advice.
Standard Accessories:
- Carry Case (Part Number: 71G082)
- Mains Supply Test lead (Part Number: 44B165)
- Black Continuity/Earth Test Lead 1m (Part Number: 161A024)
- Australian IEC mains cord 0.5m (Part Number: 325A005)
Optional Accessories:
- Leakage test 3-Phase Adaptor (Part Number: 372A950)
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