![Crown CT44051 [4/35] Maintenance](/img/pdf.png)
Crown CT44051 [4/35] Maintenance
![Crown CT44051 [4/35] Maintenance](/views2/1880916/page4/bg4.png)
English
5
English
6
Safety notices:
The use of meter instruments near devices with large electromagnec disturbances will be
unstable and may even cause large errors.
Do not use when the appearance of the meter or the test pen is broken.
If the meter is not used correctly, the safety funcons provided by the meter may fail.
Care must be taken when working around bare conductors or buses.
Do not use this instrument near explosive gas vapor or dust.
The correct input funcon must be used to measure the range.
The
input value must not exceed the limit of the input value specified for each range to
prevent damage to the instrument,
Do not touch the unused input when the instrument is connected to the circuit under test.
When the measured voltage exceeds 60 Vdc or 30 Vac, use cauon to prevent electric shock.
When measuring with a test pen, place your finger behind the guard ring of the test.
Before converng the range, it must be ensured that the test pens have le the circuit under
test.
Before carrying out a resistance, diode, capacitance measurement or connuity test, the
circuit under test must be powered off and all high-voltage capacitors in the circuit under
test should be discharged.
Do not measure the resistance on a live circuit or perform buzzer test.
Before conducng the current measurement, the fuse of the meter should be checked.
Before connecng the meter to the circuit under test, the power of the circuit under t
est
should be turned off.
When performing TV repairs or measuring power conversion circuits, care must be taken in
the high-amplitude voltage pulses in the circuit under test to avoid damage to the meter.
The instrument uses three pieces AA 1.5V baeries to power the baery. The baery must
be properly installed in the baery compartment of the meter.
When the baery with low voltage symbol appears, replace the baery immediately.
Insufficient baery power can
make the meter read incorrectly, which may result in electric
shock or personal injury.
When measuring voltages, do not exceed 600V. Do not use the instrument when the
instrument's housing or part of the housing is removed.
Maintenance:
When opening the instrument case or removing the baery cover, pull out the test pen
first.
The specified replacement parts must be used to service the meter.
Before opening the meter, all relevant power must be disconnected. At the same me,
yo
u must ensure that you do not have stac electricity to avoid damage to the meter.
Instrument components, instrument calibraon and maintenance operaon
instrucons are operated by professionals.
When opening the instrument housing, some capacitance in the instrument must be
noced. Even aer the instrument is turned off, dangerous voltages are kept.
If the instrument is observed Any abnormality, the table should be immediately
stopped and sent for
repair, and to ensure that it can not be used before inspecon
qualified.
When not in use for a long me, please remove the baery, and avoid storing in high
temperature and humidity.
Input protection measures
The limit voltage is 600V when the voltage is measuring.
The limit voltage is 250 Acv or the equivalent RMS voltage when the frequency,
resistor ,buzzer or the diode is measuring.
The fuse (F200mA/250V)will work to protect when the uA and mA is measuring.
General
maintenance
In order to avoid electric shock or damage to the instrument, it cannot be the inside
of the instrument. Before opening the housing or the battery cover, the connection of the
test meter and the input signal must be removed.
Periodically use a damp cloth and a small amount of detergent to clean the meter housing. Do
not use abrasives or chemical solvents. Input sockets, if soiled or wet, may affect readings.
Technical datasheet
Comprehensive indicators
*Operang condions:
600V CAT IV and 1000V CAT.III Polluon grade: 2
Height: under 2000m
Working temperature: 0-40℃（＜80%RH, not considered ＜10℃）
Storage temperature: -10-60℃（＜70%RH, take off baery）
*The biggest vo
ltage between measurement end and ground: 600V
*Fuse protecon: mA range , fuse: FF 200mA/250V
*Test or calibrate ambient temperature：20°C±2°C
Содержание
- Ct44051 1
- Brief introduction 2
- English 1 2
- English 2 2
- Panel indication 2
- English 5 4
- English 6 4
- Maintenance 4
- Safety notices 4
- Technical datasheet 4
- English 7 5
- English 8 5
- Operation instruction 5
- At 20megohms range the reading will stabilize after a few seconds which is normal for high resistance measurements when the meter is not in circuit the display will show ol indicating that the measurement value is out of the measurement range 6
- Connect the black test pen and the red test pen to the com input socket and v ω input socket 3 connect the black test pen and red test pen to the negative and positive electrodes of the diode under test 4 the meter will display the forward bias value of the diode under test if the polarity is reversed then it shows ol the normal diode in the circuit still produces a forward voltage drop of 0 v to 0 v but the reverse bias reading will depend on the variety of the resistance value of the other channels between the two test pens 6
- English 10 6
- English 9 6
- Test a diode outside the circuit 6
- Turn the rotary switch to position 6
- Accessories 7
- Battery and fuse replacement 7
- English 11 7
- English 12 7
- Measuring transistor 7
- Spanish 13 spanish 8
- Instrucción símbolo 9
- Protección contra sobretensión de categoría ii 600v 9
- Spanish 15 spanish 9
- Spanish 17 spanish 10
- Spanish 19 spanish 11
- Spanish 21 spanish 12
- Spanish 23 spanish 13
- Russia 25 russia 14
- Russia 27 russia 15
- Инструкция символы 15
- Russia 29 russia 16
- Russia 31 russia 17
- Russia 33 russia 18
- Russia 35 russia 19
- Kazak 37 kazak 20
- Kazak 39 kazak 21
- Сипаттамасы белг і 21
- Kazak 41 kazak 22
- Kazak 43 kazak 23
- Kazak 45 kazak 24
- Kazak 47 kazak 25
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