Major tech MT915 Bedienungsanleitung

INSTRUCTION MANUAL

2-IN-1 CABLE IDENTIFIER &

DIGITAL MULTIMETER

MT915

Contents Page no

1. Applications General..........................................................................4

2. Front Panel Description......................................................................4

2.1. Transmitter Description.............................................................4

2.2. Receiver Description..................................................................4

2.3. Digital Multimeter Description.....................................................4

3. Specifications & Technical Data...........................................................5

3.1. DMM........................................................................................5

3.2. Transmitter...............................................................................6

3.3. Receiver...................................................................................6

4. Measuring Procedure.........................................................................6

4.1. Transmitter & Receiver Operation................................................6

4.2. Beep Alarm Test........................................................................7

4.3. Voltage Check...........................................................................7

4.4. Digital Multimeter Test...............................................................7

4.5. AC/DC Current Measurements....................................................7

4.6. Resistance Measurements..........................................................7

4.7. Continuity Check.......................................................................8

4.8. Diode Test................................................................................8

4.9. Max Hold Button.......................................................................8

4.10. Hold Button..............................................................................8

4.11. Auto Power Off..........................................................................8

4.12. Replacing the Fuses...................................................................9

4.13. Battery Replacement.................................................................9

1. APPLICATIONS GENERAL

The MT915 is a transmitter/receiver device which enables one person to

instantly match up ends of individual cores at either end of a multi-core

cable. With the remote kit it can tester cables installed far away either on

wall plate or patch panel. Digital multimeter function make it easy to

measure DC/AC voltage, DC/AC current , Resistance, Continuity & Diode.

2.FRONT PANEL DESCRIPTION

2.1. Transmitter Description

1 - OFF/ON switch (Transmitter) 4.3

Voltage check

2 - Low battery indicator

(Transmitter)

3 - Operation indicator (Transmitter)

4 - Cable plug (Transmitter)

5 - Alligator clips with cables of

transmitter (CHl to CH16&

reference cable)

6 - Battery cover & compartment

(Transmitter)

2.2. Receiver Description

7 - Alligator clips of receiver (CH1

& reference cable)

8 - LED diplay (blue 2bit)

(Receiver)

9 - Low battery indicator

(Receiver)

10 - Operation indicator (Receiver)

11 - Tester switch for receiver test

or test cable of put through

and cable disconnetion &

identify

12 - Voltage check switch for on

cable voltage check

13 - OFF/ON switch (Receiver)

2.3 Digital

Multimeter

Description

14 - Function switch

15 - 3 1/2 digit (2000

count) LCD

display for DMM

functions

16 - Max hold button

17 - Mode button

18 - Data hold button

19 - COM input jack

20 - V, uA, mA, Q

input jack

21 - Battery cover

&compartmen

(Receiver&DMM)

CABLE TESTER

CABLE IDENTIFIER

CABLE TESTER

CABLE IDENTIFIER

Vcheck

DC Voltage 200mV, ±(0.5% rdg + 3d)

2.000V, 20.00V, ±(1.0% rdg + 3d)

200.0V, 600V ±(1.0% rdg + 3d)

AC Voltage 2.000V, 20.00V ±(1.0% rdg + 5d)

50-60Hz 200.0V, 600V ±(1.5% rdg + 10d)

DC Current 200.0μA, 2000μA ±(1.5% rdg + 3d)

20.00mA, 200.0mA ±(2.0% rdg + 3d)

AC Current 200.0μA, 2000μA ±(1.8% rdg + 8d)

20.00mA, 200.0mA ±(2.5% rdg + 8d)

Resistance 200.0Ω ±(0.8% rdg + 5d)

2.000kΩ, 20.00kΩ ±(1.2% rdg + 3d)

200.0kΩ

2.000MΩ ±(2.0% rdg + 5d)

20.00MΩ ±(5.0% rdg + 8d)

Function Range

3. SPECIFICATIONS & TECHNICAL DATA

3.1. DMM

Accuracy

Max input voltage 600V AC/DC

Diode Test Test current 1mA max., open circuit voltage of

1.5V typical

Continuity Check Audible signal if the resistance is <150Ω

Display 2000 count 3 -1/2 digit LCD

Over range indication LCD displays “OL”

Polarity Minus (-) sign for negative polarity.

Low Battery Indication “BAT” symbol indicates low battery condition.

Input Impedance >7.5MΩ (VDC & VAC)

AC Response Average responding

ACV Bandwidth 50Hz to 60Hz

Auto Power Off 15 minutes (approximately)

Fuse mA, μA ranges; 0.2A/250V fast acting Fuse

Batteries 9V battery and two “AAA” batteries

Operating Temperature 0°C to 40°C (32°F to 104°F)

Storage Temperature -10°C to 50°C (14°F to 122°F)

Weight 308g

Size 162 x 74.5 x 44.0mm

Standard IEC61010-1 CAT III-600V Pollution degree II,

CE Approved

Function Range

3.2. TRANSMITTER

Display Two red LED lamps

Aligators 17 Croc clips-red*16,black*1

Cable resistance 30K Ohm max

Power 9V battery

Power current 1.8mA

Operating temperature 0°C to 40°C (32°F to 104°F)

Storage temperature –10°C to 50°C (14°F to 122°F)

Function Range

3.2. RECEIVER

Display Two digit blue LED display

Aligators 2 Croc clips-red*1,black*1

Power 9V battery

Power current 23mA

Operating temperature 0°C to 40°C (32°F to 104°F)

Storage temperature –10°C to 50°C (14°F to 122°F)

Continuity test Beep if less than 100Ω

Cable voltage check 5V to 16V DC

Function Range

4. MEASURING PROCEDURE

4.1. Transmitter & Receiver Operation

1. At one end of the cable, connect one of the transmitter terminals

marked “CH1 to CH16” to each core of the cable under tester. Connect

the “COM”reference lead (black alligator) of the transmitter to a core

which is the only known one.

2. At the other end of the cable, connect the “COM terminal”(black

alligator) of the receiver. When the “input terminal” (red alligator) of

the receiver is successively touched on the cores of the cable under

test, the relevant number of the way is indicated on the display of the

receiver (1-16).

Operation example 1: Cable trace test

Operation example 2: Metal water pipe trace test

CAUTION: Though the units already build in the protection

circuit, do not apply voltage that is over 50V (AC or DCV) to

any alligator clips of the transmitter & receiver. Otherwise

the instruments may be permanently damaged.

4.2. Beep alarm test

1. Press the “TEST” button in on the Cable Identifier.

2. Connect the 2 Croc Clips to both sides of a cable to check the

continuity. If the cable is fine a beep sound will be heard.

4.3. Voltage Check

1. Press the “V check” button to down use receiver of 2 Croc clips.

2. Connect the Black alligator to the “COM” reference and connect the Red

alligator to the cable port, if two digit blue LED display is “ UU ” this

proves the cable has voltage. Only check is mainly voltage.

4.4. Digital Multimeter Test

4.4.1. AC/DC Voltage Measurements

1. Insert the black test lead into the negative COM terminal and

the red test lead into the positive V terminal.

2. Set the function switch to VAC or VDC position.

3. Connect the test leads in parallel to the circuit under test.

4. Read the voltage measurement on the LCD display.

4.5. AC/DC Current Measurements

1. Set the function switch to the μA/mA position.

2. Insert the black test lead into the negative COM terminal and the red

test lead into the positive μA/mA terminal.

3. For current measurements up to 2000μA DC/AC, set the function switch

to the mA position

4. Press the MODE button to indicate “DC” / “AC” on thedisplay.

5. Remove power from the circuit under test, then open up the circuit at

the point where you wish to measure current.

6.Touch the black test probe tip to the negative side of the circuit. Touch

the red test probe tip to the positive side of the circuit.

7. Apply power to the circuit.

8. Read the current in the display

4.6. Resistance Measurement

1. Set the function switch to the Ω position.

2. Insert the black test lead into the negative COM terminal and the red

test lead into the positive Ω terminal.

CAUTION: Beep if less than 100Ω.

CAUTION: Check voltage range at 5V to 16V DC.

CAUTION: Do not measure AC/ DC voltages if a motor on the

circuit is being switched ON or OFF. Large voltage surges may

occur that can damage the meter.

3. Touch the test probe tips across the circuit or part under test. It is best

to disconnect one side of the part under test so the rest of the circuit

will not interfere with the resistance reading.

4. Read the resistance in the display

4.7. Continuity Check

1. Set the function switch to the position.

2. Insert the black test lead into the negative COM terminal and the red

test lead into the positive Ω terminal.

3. Press the MODE button to indicate on the display

4. Touch the test probe tips to the circuit or wire you wish to check.

5. If the resistance is less than approximately 150Ω, the audible signal will

sound. If the circuit is open, the display will indicate “OL”.

4.8 Diode Test

1. Set the function switch to the position.

2. Press the MODE button to touch the test probes to the diode indicate

the on the display. under test. Forward voltage will typically indicate

0.400 to 0.700V. Reverse voltage will indicate “OL”. Shorted devices will

indicate near 0V and an open device will indicate “OL” in both polarities

4.9. MAX Hold Button

To hold the highest reading on the LCD

1. Press the MAX hold button. The meter reading will not change as

readings change

2. Press the MAX hold button again to return to normal operation.

4.10. Hold Button

The Data Hold function allows the meter to “freeze” a

measurement for later reference

1. Press the “DATA HOLD” button to “freeze” the display, the “HOLD”

indicator will appear.

2. Press the “DATA HOLD” button to return to normal operation.

4.11. Auto Power Off

The auto off feature will turn the meter off after 15 minutes.

WARNING: To avoid electric shock, disconnect power to the

unit under test and discharge all capacitors before taking any

resistance measurements. Remove the batteries and unplug

the line cords.

WARNING: To avoid electric shock, never measure Continuity

on circuits or wires that have voltage on them.

4.12. Replacing the Fuses

1. Disconnect the test leads from the meter.

2. Remove the protective rubber holster.

3. Remove the battery cover (two “B” screws) and thebattery.

4. Remove the four “A” screws securing the rear cover.

5. Lift the center circuit board straight up from the connectorsto gain

access to the fuse holders.

6. Gently remove the old fuse and install the new fuse into the holder.

7. Always use a fuse of the proper size and value (0.2A/250V fast blow for

the 200mA range).

8. Align the center board with the connectors and gently press into place.

9. Replace and secure the rear cover, battery and battery cover.

4.13. Battery Replacement

1. Both for the transmitter or receiver, when the “Low battery indicator” is

lit, it is necessary to replace the battery. Measurements may still be

made several hours after the low battery indicator

2. Remove the bottom cover and secure the screw.

3. Replace old battery with fresh two 1.5V AAA or 9V type battery.

4. Replace the bottom cover and secure the screw.

WARNING: To avoid electric shock, disconnect the test leads

from any source of voltage before removing the fuse cover.

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