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Copyright HT ITALIA 2010

Release EN 1.01 - 19/01/2011

ENGLISH

User manual

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Summary of Contents for HT21

Page 1: ... Copyright HT ITALIA 2010 Release EN 1 01 19 01 2011 ENGLISH User manual ...

Page 2: ... key 6 4 2 4 MODE key 6 4 2 5 Auto power Off 6 4 3 Measurements 7 4 3 1 DC Voltage measurement 7 4 3 2 AC Voltage measurement 8 4 3 3 Resistance and Continuity Test measurements 9 4 3 4 Diode test 10 4 3 5 Frequency and Duty Cycle measurements 11 4 3 6 Capacitance measurement 12 5 MAINTENANCE 13 5 1 General information 13 5 2 Battery replacement 13 5 3 Cleaning 13 5 4 End of life 13 6 TECHNICAL SP...

Page 3: ...ment or its components Danger high voltage risk of electric shocks Double insulated meter AC voltage DC voltage Ground reference 1 1 PRELIMINARY This instrument has been designed for use in environments of pollution degree 2 It can be used for VOLTAGE measurements on installations of CAT III 600V This instrument can perform only AC sinusoidal voltage measurements You must comply with the usual saf...

Page 4: ...ory 6 7 4 Measuring circuits OMISSIS circuits are divided into the following measurement categories Measurement category IV is for measurements performed at the source of the low voltage installation Examples are electricity meters and measurements on primary overcurrent protection devices and ripple control units Measurement category III is for measurements performed in the building installation ...

Page 5: ... was checked both mechanically and electrically prior to shipment All possible cares and precautions were taken to let you receive the instrument in perfect conditions Notwithstanding we suggest you to check it rapidly eventual damages may have occurred during transport if so please contact the local distributor from whom you bought the item Make sure that all standard accessories mentioned in 6 3...

Page 6: ...NSTRUCTIONS 4 1 INSTRUMENT DESCRIPTION 4 1 1 Front panel description LEGEND 1 LCD 2 Rotary selector 3 COM input jack 4 V Hz CAP input jack 5 MODE key 6 Hz key 7 HOLD key 8 REL key 9 Battery cover Fig 1 Instrument description ...

Page 7: ...ons 4 2 3 REL key By pressing REL the relative measure is activated The meter sets the display to zero and saves the actual value as reference The REL symbol is shown at display This function is not active on Hz duty cycle continuity test and diode test measurements Pressing again the key to exit from this function 4 2 4 MODE key By pressing MODE key the selection of a double measured functions wh...

Page 8: ... the test leads into the jacks the red plug into V Hz CAP jack and black plug into COM jack see Fig 2 3 Connect the red and black test leads to the positive and negative poles of the circuit under test respectively The voltage value is displayed 4 If the message O L is displayed the higher range is reached 5 The symbol on the instrument display indicates that voltage has opposite direction with re...

Page 9: ...layed 2 Insert the test leads into the jacks the red plug into V Hz CAP jack and black plug into COM jack see Fig 3 3 Connect the test leads to the circuit under test the voltage value is displayed 4 If the message O L is displayed the higher range is reached 5 Pressing the Hz key until the symbols Hz or are shown at display to meaning the readings of frequency or duty cycle associated to voltage ...

Page 10: ...ed 2 Insert the test leads into the jacks the red plug into V Hz CAP jack and black plug into COM jack see Fig 4 3 Connect the test leads to the circuit under test The resistance value is displayed 4 If the message O L is displayed the higher range is reached 5 Pressing the MODE key until the symbol is shown at display to meaning the Continuity test and connect the meter as resistance measurement ...

Page 11: ...g the diode test 3 Insert the test leads into the jacks the red plug into V Hz CAP jack and black plug into COM jack see Fig 5 4 Connect the test leads to the diode under test observing the proper polarities indicated in Fig 5 The threshold voltage value expressed in mV under this situation is displayed 5 If the threshold voltage value is 0V the diode P N junction is shorted circuit 6 If the messa...

Page 12: ...s displayed 2 Insert the test leads into the jacks the red plug into V Hz CAP jack and black plug into COM jack see Fig 6 3 Connect the test leads to the circuit under test The frequency value with kHz or MHz units is displayed 4 If the message O L is displayed the higher range is reached 5 Pressing the Hz key until the symbol is shown at display to meaning the Duty Cycle test and connect the mete...

Page 13: ...ssing the MODE key until the nF symbol is shown at display to meaning the capacitance measurement 3 Insert the test leads into the jacks the red plug into V Hz CAP jack and black plug into COM jack see Fig 7 4 Press the REL key before start the measurement 5 Connect the red and black test clamps to the capacitor terminals respecting if necessary the proper polarities The capacitance value is shown...

Page 14: ...s displayed the battery is to be replaced CAUTION Before replacing the battery disconnect test leads from any energised circuits to avoid electrical shocks 1 Turn off the instrument 2 Disconnect the test leads from the input terminals 3 Remove the fixing screws from the back case and detach it 4 Replace the battery with a new one of the same type refer to 6 1 2 observing the proper polarities 5 Re...

Page 15: ...ms 40 00V 0 01V 1 5 rdg 3dgt 400 0V 0 1V 600V 1V 2 0 rdg 4dgt Frequency range 50Hz 400Hz Resistance Autorange Range Resolution Accuracy Overload protection 400 0 0 1 1 2 rdg 4dgt 250VDC ACrms 4 000k 0 001k 1 0 rdg 2dgt 40 00k 0 01k 1 2 rdg 2dgt 400 0k 0 1k 4 000M 0 001M 40 00M 0 01M 2 0 rdg 3dgt Diode Test Feature Resolution Accuracy Max open voltage Overload protection 1mV 10 rdg 5dgt circa 1 5VD...

Page 16: ...cs Dimensions LxWxH 138 x 68 x 37mm 5 4 x 2 7 x 1 5 inches Weight including battery 210g 7 ounces Power supply Battery type 1x9V battery NEDA 1604 IEC 6F22 Indication of low battery symbol is displayed Auto Power OFF after 30 minutes of idleness Display Specifications 4 LCD 4000 points symbol and decimal point Sample rate 2times s 6 2 ENVIRONMENT 6 2 1 Environmental conditions Reference temperatur...

Page 17: ...t by non skilled or unauthorized personnel Instruments for whatever reason modified by the customer himself without explicit authorization of our Technical Dept Faults due to adaptation to a particular application not provided for by the definition of the equipment or by the instruction manual The contents of this manual may not be reproduced in any form whatsoever without the manufacturer s autho...

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