Topex 94W104 Manual De Usuario página 5

• LCD display. Display of 3 and ½ digits. Maximum reading
• 1999 Automatic indication of depletion of the supply battery,
exceeding the measuring range of OL and DC polarity.
• Rotary switch for functions and measuring ranges. With this
the switch selects the required function (measurement of current, voltage,
resistance, diode test, etc.), the measuring range and switches the
instrument on/off (OFF). To extend battery life, the rotary switch should be
set to the "OFF" position when the multimeter is not in use.
• Measurement socket "10A" (plus). Socket for measuring direct current
values up to a maximum of 10A. Measuring range 10A - without
overcurrent protection by a fuse. A red-coloured measurement cable is
connected to the socket.
• Measuring sockets "VmA Ω"(plus). Socket for measuring AC or DC voltage, DC
current up to a maximum of 200mA, resistance and for testing diodes or
batteries. A red-coloured test lead is connected to the socket.
• "COM" socket (common, negative). A black-coloured test lead is connected
to the socket.
GENERAL TECHNICAL DATA
• LCD liquid-crystal display: maximum reading 1999. Automatic indication
of discharged power supply battery, exceeded measuring range and DC
polarity.
• Measurement method: analogue-to-digital converter.
• Overrange indication: display of OL digit.
• Reading frequency: 2-3 times/second.
• Operating temperature: 0 ºC - 40 ºC, relative humidity < 75%R.H
• Storage temperature: -10 ºC - 50 ºC , relative humidity
< 75 % R.H.
• Power supply: 9V (6F22) battery.
• Battery low indicator:
on the LCD display.
• Dimensions: 138 x 70 x 28mm.
• Weight: 141g (with battery).
FUNCTIONS, RANGES, TOLERANCES
• Accuracy is quoted for a period of 1 year after initial calibration at an
operating temperature of 18 ºC - 28 ºC and a maximum relative humidity of 75%
R.H.
• Accuracy is given as + - [(% of reading value) + (number of least significant
digits)].
FUNCTION: DC VOLTAGE MEASUREMENT
SCOPE DISPLAY
100μV
200mV
2V
20V
200V 100mV
300V
FUNCTION: ALTERNATING VOLTAGE MEASUREMENT
SCOPE
200V
300V
Measurement of the rms value of a sinusoidal waveform in the
frequency range 40Hz - 400Hz.
FUNCTION: DC MEASUREMENT
SCOPE
20μA
200μA
2000μA
20mA
200mA
10A
This product has two fuses to protect the product: 250mA / 300V and
1.0A / 300V.
FUNCTION: RESISTANCE MEASUREMENT
SCOPE
200Ω
2kΩ
20kΩ
200kΩ
2MΩ
FUNCTION: SEMICONDUCTOR DIODE TEST
SCOPE
ACCURACY
+- (0,5% + 5)
1mV +- (0,8% + 5)
10mV +- (0,8% + 5)
+- (0,8% + 5)
1V +- (1,0% + 5)
DISPLAY ACCURACY
100mV +- (1,2% + 10)
1V +- (1,2% + 10)
DISPLAY ACCURACY
0.01μA
+- (1,2% + 5)
0.1μA
+- (1,0% + 5)
1μA
+- (1,0% + 5)
10μA
+- (1,0% + 5)
100μA
+- (1,2% + 5)
10mA +- (2,0% + 5)
DISPLAY ACCURACY
0,1Ω
+- (1,2% + 5)
1Ω
+- (1,2% + 5)
10Ω
+- (1,2% + 5)
100Ω
+- (1,2% + 5)
1kΩ
+- (1,2% + 5)
DESCRIPTION
FUNCTION: BATTERY TEST
SCOPE
1,5V
The display will show the battery voltage. This will
allow you to assess the state of charge of the battery
9V
PERFORMING DC VOLTAGE MEASUREMENTS
• The red test lead should be connected to the socket
"VmAΩ" and the black colour to the "COM" socket.
• Set the rotary switch of the function to measure DC voltage
"V" to the appropriate range in relation to the measured value. If the
measured value of the DC voltage is not known, set the switch to the
maximum range and possibly reduce it later to obtain the highest
measurement accuracy
• The measuring tips should be connected or lightly pressed to the measured
voltage source in the device or circuit. The value of the measured voltage along with
its polarity will appear on the LCD display.
MEASURING THE RMS VALUE OF ALTERNATING VOLTAGE
• The red test lead should be connected to the socket
VmAΩ" and black to the "COM" socket.
• Set the rotary switch of the function to measure voltage
AC " " to the appropriate range in relation to the measured value. If the
measured value of the AC voltage is not known, the switch should be set to
the maximum range and possibly reduced later to obtain the highest
measurement accuracy.
• The measuring tips should be connected or lightly pressed to the
measured voltage source in the device or circuit. The value of the
measured voltage along with its polarity will appear on the LCD display.
MEASUREMENT OF DIRECT CURRENT VALUES
• The red test lead should be connected to the socket
"VmAΩ", and the black colour to the "COM" socket if the measured current
value will not be greater than 200mA. If the expected measured value of DC
current will be greater than 200mA, the red wire should be connected to the "10A"
socket. The maximum time for a current (measurement) of 10A to flow through the
multimeter is 10 seconds. After such a measurement, wait at least 15 minutes with
current measurements on the 10A range.
• Set the function rotary switch to measure DC current
"A " to the appropriate range in relation to the measured value. If
the measured value of the DC current is not known, set the switch to the
maximum range and possibly reduce it later to obtain the highest
measurement accuracy.
• Disconnect the circuit supply voltage, then disconnect the circuit and connect the
measuring wires in series with the load whose current you want to measure.
• Then switch on the supply voltage and read the value of the measured
current on the LCD display.
RESISTANCE MEASUREMENT
• The red test lead should be connected to the socket
"VmAΩ" and the black colour to the "COM" socket.
• Set the rotary switch of the function to measure resistance to the appropriate
range in relation to the measured value. If the measured value of the resistance
is not known, the switch should be set to the maximum range and possibly
reduced later to obtain the highest measurement accuracy.
• Before measuring the resistance in a circuit or device, switch off the supply voltage
and discharge all capacitors.
• The measuring tips should be connected or lightly pressed against the
resistance to be measured. The value of the measured resistance will appear
on the LCD display.
SEMICONDUCTOR DIODE TEST
• The red test lead should be connected to the socket
VmAΩ" and black to the "COM" socket.
• Set the function rotary switch to diode test" ".
• Before testing a diode in a circuit or device, the voltage must be switched off
power supply.
• Connect or lightly press the end of the red test lead to the anode of the diode under
test and the end of the black test lead to the cathode. If a voltage value appears
on the LCD display (this will be the diode's conduction voltage), this indicates that
the diode is not defective.
• If OL is shown on the display, the test leads must be connected in reverse, as the
diode may be negatively polarised.
• The appearance of an OL indication after the diode has changed polarity
indicates that the diode is faulty.
BATTERY TEST
5
The LCD display will show the voltage value
conduction of a diode
DESCRIPTION TEST CONDITIONS
Operating
current
approximately
20mA
Operating
current
approximately
5mA