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Summary of Contents for Simpson 228
- Page 1 Model 228 Current Leakage Tester INSTRUCTION MANUAL GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
- Page 2 SIMPSON ELECTRIC COMPANY neither assumes nor authorizes any other persons to assume for it any other liability in connection with the sales of its products.
- Page 3 IEC 60950 and EN 61010-1 and utilizes the networks listed in Figures 1 through 3 on page 4 below: Instruments such as the Model 228 are intended for use in relatively low power 120/ 240 VAC or dry battery operated circuits. Never use this Instrument for measure- ments in high-energy or high-power circuitry such as power substations, distribution centers, RF induction heaters, broadcast transmitters and X-ray equipment.
- Page 4 M228 INPUT EQUIVALENT CIRCUITS 0.22UF 1.5K INPUT Burn Hazard Figure 1 0.22UF 1.5K INPUT 9.16NF 6.19NF Let Go Figure 2 0.22UF 1.5K INPUT .022UF React Figure 3 GlobalTestSupply www. .com Find Quality Products Online at: sales@GlobalTestSupply.com...
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Page 5: Table Of Contents
Contents 1. INTRODUCTION ................6 1.1 General Description ................6 1.2 What Is Leakage Current? ..............6 1.3 Human Response to Electrical Shock ............ 7 1.4 Shock Hazard ..................8 1.5 Burn Hazard ................... 8 1.6 Inspection of Instrument ................. 8 1.7 Components and Accessories .............. -
Page 6: Introduction
Measurement, Control and Laboratory Use.” The input networks utilized in this instrument are detailed in Figures 1 through 3 on page 4. The Model 228 tests equipment operating at 120-220 volts AC or DC power line circuits only. Instrument features include: •... -
Page 7: Human Response To Electrical Shock
This high-frequency current may be a significant part of the total leakage current. The human body becomes less sensitive to leakage current as the frequency is increased. The 228 takes the frequency of the leakage current into account when making measurements and displays a reading that correctly reflects the potential hazard from the leakage current. -
Page 8: Shock Hazard
When making routine leakage current measurements as part of equipment maintenance, refer to the equipment manufacturer for the acceptable leakage current level. When using the 228 for testing safety of new designs, check with the appropriate safety agency for the correct leakage current limits. -
Page 9: Specifications
SPECIFICATIONS NOTE: These specifications apply to Sinusoidal AC waveforms only. Accuracy is not guaranteed for non-sinusoidal or complex waveforms. Response level Specification Burn Reaction Let-Go Hazard Output Connector Loading 1M , 10 pF 1M , 62 pF 1M , 1 pF Range 0.3, 1,3, 10 MIU 0-100 mA RMS... -
Page 10: Controls And Functions
Weight: ½ Low-Battery Indication: Instrument provides a battery test selection c t i CONTROLS AND FUNCTIONS Meter Dial BATT. Mechanical Zero Adjustment Screw WARNING READ MANUAL BEFORE USE OUTPUT SHOCK HAZARD BURN (MIU) HAZARD RESPONSE (0-100mA) VOLTS REACT. DC-1KHz 300 Volts max BATT. -
Page 11: Interpreting The Meter Dial Scales
Burn Hazard Scale (measured in mA RMS) Used when selecting the BURN HAZARD function in order to read potential burn hazard leakage current. Shock Hazard Scales (measured in MIU RMS and MIU Peak) Used when selecting the SHOCK HAZARD function in order to measure shock hazard leakage current. -
Page 12: Reading The Meter Dial Scales
READING THE METER DIAL SCALES The analog meter scales require interpolation to obtain readings that fall in between the major scale markings. See Figure 6 below, as example. Example: Burn hazard reading is 50mA RMS or MIU (bottom) reading is 1.5 MIU for the 3 MIU range Figure 6 “+”... -
Page 13: Measurement Procedures
(or from the equipment manufacturer) for correct main con- nection, detailed test procedures and leakage current limits. Figure 7, Page 14, shows a typical test setup. All items other than the 228 and its accessories must be provided by the user. -
Page 14: Preparation
BATT. SW 2 Appliance Under Test 120V WARNING READ MANUAL BEFORE USE OUTPUT SHOCK BURN HAZARD HAZARD (MIU) RESPONSE (0-100μA) VOLTS Open DC-1KHz REACT. 300 Volts max BATT. LET GO Ground LEAKAGE CURRENT TESTER Grounded Supply Connector Figure 7. Typical Test Setup Preparation Turn power OFF to equipment under test. -
Page 15: Burn Hazard Measurement
Turn Function Select switch to VOLTS. Connect Instrument Ground Test Lead to known good ground (such as a water pipe or power line ground). With SW1 open, turn ON equipment under test. Use Positive Test Lead to probe all accessible conductive surfaces to determine if excessive voltage is present. -
Page 16: Shock Hazard Measurement
Shock Hazard Measurement Turn Function Select Switch to 10MIU SHOCK HAZARD (see Figure 10 below). WARNING READ MANUAL BEFORE USE OUTPUT SHOCK HAZARD BURN (MIU) RESPONSE HAZARD (0-100mA) REACT. BATT. LET GO LEAKAGE CURRENT TESTER Figure 10 Use Positive Test Lead to probe all accessible conductive surfaces and check for excessive current leakage. -
Page 17: Maintenance And Care
Service The Model 228 Current Leakage Tester contains no operator-serviceable parts, ex- cept for the batteries and the fuse. Refer all service requests to an authorized service dealer or to the factory. -
Page 18: Fuse Replacement
Verify Instrument calibration by performing operational checks using known value sources. For information on Instrument calibration, call Simpson Customer Ser- vice. It is recommended that the Instrument be returned annually to the factory for inspection and calibration. -
Page 19: Rms Vs. Peak
If the readings match (after adjusting for attenuator scale factor), then the amplifiers are not in overload, and the more sensitive range may be used. If the readings do not match, the Model 228 is overloaded, and a higher range must be used.
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