HT instruments HT39 User Manual
Page 2
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