TM16 - Multimeter ALECTO - Free user manual and instructions

Product Type	Digital Multimeter
Brand	Alecto
Model	TM16
Power Supply	1 9V battery (type 6LR61)
Display	3 1/2 digit LCD display (1999)
DC Voltage Ranges	200 mV, 2 V, 20 V, 200 V, 500 V
AC Voltage Ranges	200 V, 500 V
DC Current Range	200 µA, 2 mA, 20 mA, 200 mA, 10 A
Resistance Range	200 Ω, 2 kΩ, 20 kΩ, 200 kΩ, 2 MΩ, 20 MΩ
Diode Test	Yes, threshold voltage measurement
Transistor Test	Yes, hFe gain measurement (NPN/PNP)
Overrange Indication	Display shows '1'
Electrical Protection	Fuse 250 V/0.2 A on mA range
Safety Standards	LVD: EN 61010-1, EN 61010-2-31; EMC: EN 55011-3, EN 50082-1
Dimensions (approx.)	150 x 70 x 30 mm
Weight	Approximately 250 g
Maintenance	Clean with a dry cloth
Included Accessories	Test leads, 9V battery
Battery Replacement	Yes, accessible from the back
Fuse Replacement	Fuse 250 V/0.2 A

Frequently Asked Questions - TM16 ALECTO

How to measure DC voltage?

Turn the rotary switch to V= (DC voltage). Start with the highest range (500 V) if the voltage is unknown. Connect the red probe to the V/Ω/mA input and the black probe to COM. Place the probes in parallel with the circuit. The display shows the voltage with a minus sign if polarity is reversed.

How to measure DC current?

Turn off the power to the circuit. Open the circuit at the measurement point. Turn the rotary switch to the appropriate A= range (start with the highest). Connect the red probe to V/Ω/mA for currents below 200 mA, or to 10 A for currents up to 10 A. Place the probes in series in the circuit. Restore power and read the value.

How to measure resistance?

Ensure the circuit is powered off and disconnected. Turn the rotary switch to Ω. Connect the red probe to V/Ω/mA and the black probe to COM. Place the probes across the resistor to be measured. The display shows the value in ohms. For in-circuit resistors, isolate one side to avoid parallel paths.

What does the display '1' mean?

A fixed '1' display indicates an overrange (overload). You must select a higher range to obtain a valid reading. This can also occur if the circuit is open or the measured value exceeds the maximum capacity of the selected range.

How to test a diode?

Turn the rotary switch to the diode position. Connect the red probe to V/Ω/mA and the black to COM. Place the red probe on the anode and the black on the cathode. The display shows the threshold voltage (about 0.6 V for a silicon diode). If the diode is reversed, the display shows '1'. This test does not guarantee the complete quality of the diode.

How to test a transistor?

Ensure the transistor is disconnected. Turn the rotary switch to hFe. Identify the type (NPN or PNP) and the pins (E, B, C). Insert the transistor into the appropriate socket respecting polarity and connections. The display shows the hFe gain of the transistor.

How to replace the battery?

Remove the test leads. Set the rotary switch to OFF. Unscrew the two screws on the back and open the case. Replace the used 9V battery with a new one of type 6LR61 (alkaline preferred). Close the case and tighten the screws.

How to replace the fuse?

Turn off the device and remove the test leads. Open the case (see battery replacement). Locate the fuse (often 250 V/0.2 A). Replace it with an identical fuse. Close the case. Never use a fuse of a different rating.

What safety precautions to take?

Never measure a voltage above 500 V. Disconnect the test leads before changing functions. Use test leads in good condition. Be cautious above 48 V. Avoid strong magnetic fields. Follow the instructions in the manual.

What to do if the device does not turn on?

First check the battery: if it is discharged, replace it (9V battery). Ensure the rotary switch is not set to OFF. Check the fuse condition. If the problem persists, the device may be defective and requires technical service.

USER MANUAL TM16 ALECTO

TENSION CONTINUE/TENSION ALTERNATIVE:

An overload will be displayed by a '1' on the display. Increase the range.

A negative voltage or current will be displayed by a minus (-) sign in front of the actual read-out.

AC & DC VOLTAGE:

Exercise extreme care when measuring voltages which are over 48 volt.

1. Select the desired V = (direct voltage) or V (alternating voltage) range. If the magnitude is unknown, always start at the highest range and reduce until a satisfactory reading is obtained.
2. Connect the red test lead to the V / Ω / mA input jack and the black test lead to the COM jack.
3. Connect the test leads to the device or circuit being measured and read the measured value from the display.

When one of the ranges 500 V(DC) or 500 V(AC) is selected, the display shows HV to indicate extra precautions due to the High Voltage.

DC CURRENT:

Current is being measured by making an interruption in the circuit and by positioning the test leads at those places.

Always switch off power to the device under test prior to make an interruption and never remove the test leads before the power of the device is switched off again.

Be aware of the high switch-on current of some devices like transformers, motors, coils etc.

1. Select one of the A = ranges. If the magnitude is unknown, always start at the highest range and reduce until a satisfactory reading is obtained.
2. Connect the red test lead to the V / Ω / mA input jack for current measurements up to 200 mA and connect the black test lead to the COM input jack.
3. Open the circuit to be measured and connect the test leads in series with the load in which the current is to be measured.
4. Read the current value on the display.
5. For currents up to 10A DC, select the 10A range and connect the red test-lead to the 10ADC input bus

RESISTANCE:

To measure resistance, the TM-16 measures the voltage over the resistance when a known current flows through it after which it calculates the resistance; therefor it is important to make measurements only with the power switched OFF.

To reduce measuring errors, caused by parallel resistors, it is advisable to remove the resistor from the circuit and not to touch the metal part of the test leads and/or resistor.

1. Connect the red test lead to the V / Ω /mA input jack and the black test lead to the COM jack.
2. Set the rotary/function switch on the desired Ω range.
3. Connect the test leads to the resistor.
4. The display shows the resistance.

DIODE:

When testing a diode, the LCD readout will show 1... (overload) when the diode is in back-direction; when the diode is in conductive-direction, than the meter readout will show the forward voltage.

The same rules as described by "RESISTANCE" are applicable during diode measurements.

1. Set the selector switch to
2. Connect the red test lead to the V / Ω /mA input jack and the black test lead to the COM jack.
3. Connect the test leads to the diode.

Be aware that the meter only shows whether the diode conducts or blocks; there is no indication concerning the quality of the diode.

TRANSISTOR hFe MEASUREMENT:

1. Set the selector switch to hFe.
2. Insert the transistor in the transistorsocket on the TM-16 using the correct connections for E(mitter), C(收集) and B(ase) and for NPN or PNP versions
3. Read the hFe (beta or DC current gain) in the display.

BATTERY / FUSE REPLACEMENT

An almost empty battery is indicated by a battery-low warning on the display. A defective fuse is noticeable by a constant readout of 000 (or '1' in case a resistance range is selected).

1. Before attempting to replace the battery or fuse, disconnect the test leads from any energized circuit to avoid shock hazard.
2. Remove the two screws in the bottom of the case and remove the plastic cover.
   3A. Battery: replace the battery for a fresh 9V battery, preferably an alkaline version.
   3B. Fuse: replace the fuse for a 250 Volt / 0.2 A/ F execution.
3. Replace the plastic cover and close the TM-16.

Remark: Never throw away empty batteries but hand them over to your local depot for chemical waste.

• Always check the selected range prior to connect the testleads to the measuring-object.
• If the measuring magnitude is unknown, select the highest range.
• Never select another range with the testleads connected to the measuring-object, always remove the test leads first from the circuit being measured.
• Carefully inspect the test leads. If damaged, discard and replace.
  In order to prevent damage to the unit, never fail to keep the maximum tolerable voltage and current, especially for the 10 A current range.
• Be careful when measuring voltages over 48 Volt and never use this tester in wet surroundings.
• When not in use, switch the TM-16 to the OFF position. This will save battery power.
• If the display readout gets weak, replace the battery.

LVD: The TM-16 complies with EN 61010-1 and EN 61010-2-31 as published in the LVD directive 73/23/EEC and 93/68/EEC.

EMC: The TM-16 complies with EN 55011-3.1991 and EN 50082-1.1992 as published in the EMC directive 89/336/EEC

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ALLGEMEINES

Technical specifications
3 digit LCD displayauto polarizationauto zero-setting	overrange protection (display: 1)fusaprotection (0,2A)battery: 9V
DC voltage:
range	resolution	accuracy
200mV	100μV
2V	1mV	±0.5% of rdg ± 2 digits
20V	10mV
200V	100mV
500V	1V	±0.8% of rdg ± 2 digits
Input impedance: 1MOhm on all rangesOverload protection: DC or AC peak 500V
AC voltage:
range	resolution	accuracy
200V	100mV
500V	1V	±1.2% of rdg ± 2 digits
Frequency range: 45Hz - 400Hz
Overload protection: AC 500V
Indication: Average value (rms or sine wave)
DC current
range	resolution	accuracy
200μA	100mA
2000μA	1μA	±1% of rdg ± 2 digits
20mA	10μA
200mA	100μA	±1.2% of rdg ± 2 digits
10A	10mA	±2% of rdg ± 2 digits
Overload protection: 0,2A/250V fused10A range not fused
Resistance:
range	resolution	accuracy
2000hm	0,10hm
20000hm	10hm	±0.8% of rdg ± 2 digits
20KOhm	100hm
200KOhm	1000hm
2MOhm	1KOhm	±1% of rdg ± 2 digits
Overload protection: 250VDC or AC rms (less than 10 sec)Maximum open circuit voltage: 2,8V
Transistor:
Vce appr. 2.8V, to appr. 10μA, display show appr. hFe 0-1000
Diode
Testing voltage appr. 2.4V, current 1.5 mA
working temperature: 0 - 40°C(for best accuracy: 23 ± 5°C)		storing temperature: -15 - 50°Cworking humidity: < 75%
size: 150mm x 70mm x 24mm		weight: 150gr (include battery)