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CT44051
Инструкция по эксплуатации Страница: 7

Crown CT44051 [7/35] Accessories

English

Current measurement

Do not attempt current measurement on the circuit when the voltage between the open

circuit voltage and ground exceeds 250 volts. If the fuse is blown during measurement, you may

damage the meter or harm yourself. To avoid damage to the meter or test equipment, use the

correct input socket, function gear, and range before making measurements before making

measurements. When the test pen is plugged into the current input socket, do not

connect the

other end of the test pen in parallel to any circuit.

Current measurement:

1. Turn the rotary switch to mA/A.

2. Connect the black test pen to the “COM” input socket. If the measured current is less than

200mA, connect the red test pen to the “mA” input socket. If the measured current is between

200mA and10A, connect the red test lead to the “10A” input jack.

3. The circuit to be tested is disconnected, the black test pen is connected to the disconnected

circuit, the lower voltage end thereof, and the red test pen is connected to the disconnected

circuit at the higher voltage end.

4.Connect the power supply of the circuit and then read the displayed reading. If the display

shows only “OL”,this indicates that the input exceeds the selected range. The rotary switch should

be placed at a higher range.

NCV test

Notes:

1.Even if there is no indicaon that the voltage may sll exist, do not rely on non-contact voltage

detectors to determine if there is a voltage detecon operaon on the conductor, which may be

aﬀected by factors such as socket depth, insulaon thickness, and type, etc.

2. When the input voltage is input to the instrument, due to sensing In the presence of voltage,

the voltage-sensing indicator light may light.

3. Interference sources

in the external environment, such as ﬂashlights, motors, etc., may

accidentally trigger non-contact voltage detecon.

Battery and fuse replacement

Replace batteries and fuses to avoid electric shock or personal injury caused by

erroneous readings. When the symbol appears on the instrument display, replace

the battery immediately. Use only the specified fuse, instant fuse. To avoid electric shock

or personal injury, turn off the battery cover and repl

ace it with a new one before turning

it on. The test pen has been disconnected from the measurement circuit.

Please follow the steps below to replace the baery:

1. Turn oﬀ the power of the instrument

2. Pull all the test pens out of the input socket,

3. Use a screwdriver to loosen the screws ﬁxing the baery.

4. Remove the baery cover

5. Remove the old baery or the damaged fuse

6. Replace the new one Baeries or new fuses

7. Install baeries cover and close the screws.

Accessories

1. An instrucon

2. A pair of test leads

3. Three pieces of AAA baeries

RED BLACK

Turn the rotary switch to NCV gear and place the top of the meter close to the conductor. If

the meter detects AC voltage, the buzzer will sound an alarm.

Measuring transistor

Do not apply more than 36V DC or AC voltage to the common terminal and hFE

terminal to prevent electric shock or instrument damage.

1. Turn the rotary switch to hFE gear

2. Determine whether the transistor is NPN or PNP type, and then insert the three legs of the

transistor e.b.c into the corresponding holes of hFE test base.

3. The hFE similarity value of the tested transistor is read from the liquid crystal display.

Crown CT44051 [7/35] Accessories

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