User Manual

HT37 - HT39
EN - 1
Content:
1. SAFETY PRECAUTIONS AND PROCEDURES ..........................................................3
1.1. Preliminary.............................................................................................................3
1.2. During use .............................................................................................................4
1.3. After use................................................................................................................4
1.4. Measuring (overvoltage) categories definitions .....................................................5
2. GENERAL DESCRIPTION ...........................................................................................6
2.1. Mean value and TRMS: definition..........................................................................6
2.2. True root mean square value and crest factor: definition.......................................6
3. PREPARATION FOR USE ...........................................................................................7
3.1. Initial......................................................................................................................7
3.2. Supply Voltage ......................................................................................................7
3.3. Calibration .............................................................................................................7
3.4. Storage..................................................................................................................7
4. OPERATING INSTRUCTIONS.....................................................................................8
4.1. Instrument Description...........................................................................................8
4.1.1. Front panel................................................................................................................... 8
4.2. FUNCTION Keys...................................................................................................9
4.2.1. MIN MAX...................................................................................................................... 9
4.2.2. PEAK/∆ ........................................................................................................................ 9
4.2.3. RANGE ........................................................................................................................ 9
4.2.4. HOLD ........................................................................................................................... 9
4.2.5. RS-232 for connection to PC (HT39 only).................................................................. 10
4.2.6. BACKLIGHT
(HT39 only) ..................................................................................... 10
4.2.7. Disable AutoPowerOFF ............................................................................................. 10
4.3. Measurements.....................................................................................................11
4.3.1. DC Voltage measurement.......................................................................................... 11
4.3.2. AC Voltage measurement.......................................................................................... 12
4.3.3. DC Current measurement.......................................................................................... 13
4.3.4. AC Current Measurement .......................................................................................... 14
4.3.5. Frequency measurement ........................................................................................... 15
4.3.6. Resistance measurement .......................................................................................... 16
4.3.7. Diode test and continuity test..................................................................................... 17
4.3.8. Capacitance measurement ........................................................................................ 18
5. MAINTENANCE..........................................................................................................19
5.1. General Information.............................................................................................19
5.2. Battery Replacement...........................................................................................19
5.3. Fuse Replacement ..............................................................................................20
5.4. Cleaning ..............................................................................................................20
5.5. End of life ............................................................................................................20
6. TECHNICAL SPECIFICATIONS.................................................................................21
6.1. Technical Features..............................................................................................21
6.1.1. Electrical specifications.............................................................................................. 22
6.1.2. Safety......................................................................................................................... 22
6.1.3. General data .............................................................................................................. 23
6.2. Environment ........................................................................................................23
6.2.1. Environmental conditions........................................................................................... 23
6.2.2. EMC and LVD ............................................................................................................ 23
6.3. Accessories .........................................................................................................23
7. SERVICE....................................................................................................................24
7.1. Warranty Conditions............................................................................................24
7.2. Service ................................................................................................................24