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DIGITAL MULTIMETER

OPERATOR’S MANUAL

APPA 91

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Summary of Contents for 91

Page 1: ...DIGITAL MULTIMETER OPERATOR S MANUAL APPA 91 ...

Page 2: ...NEL ONLY TO AVOID ELECTRIC SHOCK DO NOT PERFORM ANY SERVICING OTHER THAN THAT CONTAINED IN THE OPERATING INSTRUCTIONS UNLESS YOU ARE QUALIFIED TO DO SO Also the complete duty cycle for the 20A measurement should be stated as on for 30 seconds max and off for 3 minutes min ...

Page 3: ...r from its packing you should have the following items 1 Digital Multimeter 2 Test lead set one black one red 3 Operators Manual 4 Protective holster 1 2 Meter Safety Terms marked on Equipment ATTENTION Refer to Manual DOUBLE INSULATION Protection Class II DANGER Risk of electric shock ...

Page 4: ...ital Display The digital display has a 3 1 2 LCD readout maximum reading 1999 with automatic polarity overrange and low battery indicators 2 Rotary Switch Select the Function and Range desired 3 COM Input Terminal Ground input connector 4 V Ω Input Terminal Positive input connector for Volts Ohms and Diode 5 mA µA Input Terminal Positive input connector for mA and µA measurements up to 200mA 6 20A...

Page 5: ...4 1 2 4 3 5 6 Figure 1 ...

Page 6: ...d Zero Adjustment Automatic Overrange Indication 1 or 1 Low Battery Indication is displayed when the battery voltage drops below operating voltage Measuring Rate 2 5 times per second nominal Auto Power Off Approx 30 minutes Temperature Coefficient 0 15 x Specified accuracy C 18 C or 28 C Power Requirements Standard 9V battery NEDA 1604 JIS 006P IEC 6LF22 Battery Life Alkaline 300 hours ...

Page 7: ... Instruction Manual 2 2 Environmental Conditions Indoor use Maximum Altitude 2000m Installation Category IEC 1010 CAT Ⅱ 1000V 600V CAT Ⅲ CAT Ⅱ is for measurements performed on circuits directly connected to the low voltage installation CAT Ⅲ is for measurements per formed in the building installation Pollution Degree 2 Operating Temperature 0 C to 45 C below 75 R H Storage Temperature 20 C to 60 C...

Page 8: ...racy is reading number of digits at 23 C 5 C less than 75 R H 1 DC Volts Range Resolution Accuracy Over voltage protection 200mV 100 µV 0 5 rdg 1dgt DC 500V AC 350V 2V 1mV 20V 10mV 200V 100mV 1000V 1V DC 1200V AC 850V Input Impedance 10MΩ ...

Page 9: ...2 AC Volts Range Resolution Accuracy Over voltage protection 200mV 100 µV 1 25 rdg 4dgt 40Hz 500Hz DC 500V AC 350V 2V 1mV 20V 10mV 200V 100mV 750V 1V DC 1200V AC 850V Input Impedance 10MΩ less than 100pF ...

Page 10: ...ge Burden 200 µA 0 1 µA 1 0 rdg 1dgt 600mV max 2mA 1 µA 20mA 10 µA 200mA 100 µA 20A 10mA 2 0 rdg 3 dgt 900mV max 20A Range 30 seconds maximum above 10A Overload Protection 1A 500V fast blow fuse for mA µA input 16A 500V fast blow fuse for 20A input ...

Page 11: ...A 0 1 µA 1 5 rdg 3 dgt 40Hz 500Hz 600mV rms max 2mA 1 µA 20mA 10 µA 200mA 100 µA 20A 10mA 2 5 rdg 3 dgt 40Hz 500Hz 900mV rms max 20A Range 30 seconds maximum above 10A Overload Protection 1A 500V fast blow fuse for mA µA input 16A 500V fast blow fuse for 20A input ...

Page 12: ...n Accuracy Max Test Current Max Open Circuit Voltage 200Ω 0 1Ω 0 75 rdg 4 dgt 2 5mA 3 2V 2KΩ 1Ω 0 75 rdg 1 dgt 200 µA 20KΩ 10Ω 40 µA 200KΩ 100Ω 4 µA 20MΩ 10KΩ 1 5 rdg 5 dgt 40nA 0 5V 2MΩ 1KΩ 400nA Overload Protection 500V d c a c max ...

Page 13: ...s than 50Ω 7 Auto Power Off The meter will automatically shut itself off after approximately 30 minutes when the rotary switch is not changed The meter can be turned back on by switching to another range 8 Beep Guard The beeper will sound if the test lead is connected to the mA µA 20A input terminal while the rotary function selector is not in mA µA 20A position There is no beep guard at 20mA 20A ...

Page 14: ... properly connected 2 The instrument should only be operated between 0 C 50 C and at less than 75 R H 3 Do not use or store this instrument in a high temperature or high humidity environment and do not store the unit in direct sunlight 4 Do not replace battery with power on condition 5 If the unit is not to be used for a log period of time remove the battery 6 Do not forget to turn off after use 7...

Page 15: ...o measuring points and read the display value 3 3 Current Measurements 1 Set the rotary switch to the required position 2 Connect black test lead to COM terminal 3 Connect red test lead to mA µA terminal for measurement up to 200mA For measuring current between 200mA and 20A connect test lead to 20A terminal 4 Connect test leads to measuring points and read the display value ...

Page 16: ...to the position 2 Connect the black test lead to the COM terminal and the red test lead to the VΩ input terminal 3 Connect the test lead to the diode Normally the forward voltage drop of good silicon diode is shown between 500V and 900V If the diode under test is defective 000 short circuit or 1 non conductance is displayed Reverse check of diode If the diode under test is good 1 is displayed If t...

Page 17: ...t under test 4 Built in sounder operates if the resistance in the circuit under test is below 50Ω MAINTENANCE WARNING TO AVOID ELECTRICAL SHOCK REMOVE TEST LEAD BEFORE OPENING THE COVER 4 1 General Maintenance 1 Repairs or servicing not coveted in this manual should only be performed by qualified personal 2 Periodically wipe the case with a dry cloth and detergent do not use abrasives or solvents ...

Page 18: ...of the case bottom gently until it unsnaps from the case top at the end nearest the LCD 4 Lift the battery from the case top and carefully disconnect the battery from battery connector leads 5 Fit the battery connector leads to the terminals of a new battery and reinsert the battery into the case top Make sure that the battery leads to not become pinched between the case bottom and case top 6 Repl...

Page 19: ...ly prying one end of the fuse loose and sliding the fuse out of the fuse holder 4 Install a new fuse of the same size and rating Make sure the new fuse is centered in the fuse holder 5 Make sure that the case top rotary switch and circuit board switch both are in the OFF position 6 Replace the case top and case bottom Make sure that all gaskets are properly seated and the battery leads do not beco...

Page 20: ...19 Case Bottom Case Top 9V Battery Battery Connector Fuse 2 Fuse 1 Figure 2A Figure 2B Battery Replacement ...

Page 21: ...20 HOW TO USE THE PROBE HOLDER Clip one probe on the holster for one handed meter operation Wrap the leads around the holster to store the test probes ...

Page 22: ...21 HOW TO USE THE TILT STAND AND HOLSTER Swing the stand out for easier meter reading Swing the upper holder out and hook it over a door ...

Page 23: ...22 HOW TO USE THE TILT STAND AND HOLSTER Meter in holster face down Hang on a nail at the workbench ...

Page 24: ... Pao Zong Rd Shin Tien Taipai 23115 Taiwan R O C P O Box 12 24 Shin Tien Taiwan Tel 886 2 29178820 Fax 886 2 29170848 E MAIL info appatech com http www appatech com Printed In Taiwan Copright 2001 APPA Tech Corp All rights reserved ...

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