General Technologies Corp CT8012 User Manual

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1. SAFE TY RULES

1 2 3 4

200 600

2000m

200

600

200

20K

200K

2000K

1 2 3 4

OFF

MAX

600 V 250 V

GTC

CT8012

V V mA

1 2 3 4

OFF

V V mA

1 2 3 4

OFF

This meter is designed for indoor use at temperatures between 0°C to 40°C and

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altitudes up to 2,000m.

T o ensure that the meter is used safely , follow all safety and operating instructions in

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this operation manual. If the meter is not used as described in this operation manual, the safety features of this meter might be impaired.

Do not use the meter if the meter or test leads look damaged ,or if you suspect that

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the meter is not operating properly.

When using the instrument, keep your ﬁ ngers behind the ﬁ nger guards on the plastic

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casing and probes.

Disconnect the live test lead before disconnecting the common test lead.

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Make sure power is off before cutting, desoldering, or breaking the circuit wires. Small

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amounts of current can be dangerous.

Do not apply more than 500 VDC or 500V AC rms between a terminal and ground.

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To avoid electrical shock, use CAUTION when working above 60V DC or 25V AC

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rms. Such voltages pose a shock hazard.

Never make measurements with the battery cover off.

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To avoid electrical shock or damage to the meter, do not exceed the input limits.

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CT8012

4. OPERATION

4.1 INSTRUMENT DESCRIPTION

1) Case

2) 3-1/2 Digit LCD display

3) Range switch

4) Function switch

5) Fixed test lead with probe

6) Fixed probe tip and fuse cap

7) Battery cover

8) Function / Range table

9) Display hold push button (back of the unit)

2. INTERNATIONAL SYMBOLS

Important information Dangerous Voltages

see manual

Continuity AC Ground DC Double Insulation

3. TECHNICAL SPECIFICATIONS

3.1 General Speciﬁ cations

Display: 3-1/2 digits LCD, max. of 1999 display Polarity: Automatic, (-) negative polarity indication Zero adjustment: Automatic Sample rate: 0.5 Sec. Over range indication: Only the MSD “1” is displayed Power: 9-volt battery type NEDA 1604, IEC6F22 Battery life: Approx. 50 hours. (w/ alkaline batteries) Dimension: 141 x 69 x 36 mm. Weight: Approx. 330g (including battery). Accesories: User’s Manual, Alligator Clip, and 9V

alkaline battery

3.2 Electrical Speciﬁ cations

 The mark next to the probe tip, is a warning that the input

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voltage should not exceed the indicated values. This is to prevent personal injuries and damage to the internal circuitry.

 The function switches should be set to the function which you

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want to test before operation.

 Accuracies are ±(% of reading + number of least signiﬁ cant

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digits) at 23°C ±5°C, less than 75% RH.

Function Range Accuracy Input

DC Voltage 2000mV,20V,

AC Voltage 200V, 600V 1.5%+10 450 K

DC Current

Resistance

Diode Test

Continuity Beeps when < 100Ω 3VDC Max. Test Voltage 250 Vrms

200V, 600V

200 mA

2k, 20k,

200k,2000k

Test Current:1.0± 0.6mA Test Voltage: 3.2 V Max.

0.8%+1 1 M - 600 Vp-p

2.0%+2 - 200 mA/

1%+3 - - 250 Vp-p

Impedance

Remarks Overload

 50~500Hz 600 Vp-p

Protection

250V Fuse

250 Vrms

4.2 Measurement Procedures

CAUTION: Maximum Input Voltage is 500Vrms,do not exceed

this rating to avoid personal injuries or damage to the instrument. The range switch should be set to the range you want to test before the operation.

4.2.1 DC Voltage measurement

600V 200V

20V 2000mV

FUNCTION RANGE

Set the FUNCTION switch to V and the RANGE switch to the desired range position, according to the Function/Range Table.

Proceed to connect the test leads across the source or load under measurement. If the voltage range is not known beforehand, set the range switch to the highest range and work down. The polarity will be indicated when the tip probe is connected.

4.2.2 AC Voltage measurement

600V 200V

FUNCTION RANGE

Set the FUNCTION switch to V and the RANGE switch to desired position, according to the Function/Range Table.

Proceed to connect the test leads across the source or load under measurement, and read the measurement on the LCD screen.

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4.2.3 DC Current measurement

V V mA

1 2 3 4

OFF

V V mA

1 2 3 4

OFF

V V mA

1 2 3 4

OFF

1 2 3 4

OFF

V V mA

200m

FUNCTION RANGE

Set the FUNCTION switch to mA and the RANGE switch to the

200mA position. Proceed to connect test leads IN SERIES with the load in which current is to be measured, and read the measurement

on the LCD screen.

4.2.4 Resistance measurement

CAUTION: Maximum Input Voltage for these functions is 250

Vrms for less than 10 Sec., do not exceed this rating to avoid personal injuries or damage to the instrument. Also ensure there is no power applied to the circuit and all capacitors are discharged.

5. MAINTENANCE

CAUTION: Before attempting battery removal or replacement,

disconnect test leads and remove the instrument from any energized circuit to avoid shock hazard.

5.1 Battery Replacement

When the battery needs replacement, the battery symbol will appear in the lower left hand side of the LCD display. To replace the

battery, remove the screw at the back Battery Cover and replace

with a new 9 V alkaline battery type NEDA 1604 or IEC6F22.

5.2 Fuse replacement

To replace the internal fuse, turn the Fuse Cap counter clockwise,

release the Fuse Cap assembly. Take out the blown fuse and replace with a type IEC60127-2 or UL248-14 (5 x 20mm) fast acting fuse, rated at 200mA/250V.

5.3 Cleaning

Periodically wipe the case with a soft damp cloth and mild household cleanser. Do not use abrasives or solvents. Ensure that no water gets inside the instrument to prevent possible shorts and damage.

2000K 200K

20K 2K

FUNCTION RANGE

Set the FUNCTION switch to /

and the RANGE switch to

desired k range, if the resistance being measured is connected to

a circuit, turn off power and discharge all capacitors before applying probes.

Proceed to connect the test leads across the component or

circuit under test, and read the measurement on the LCD screen.

4.3 Other Functions

4.3.1 Diode test

FUNCTION RANGE

Set the FUNCTION switch to / , and RANGE switch to 2K/

position, Proceed to connect the test leads across the diode observing the polarity: red probe to the anode (+) of the diode and black test lead to the cathode (-).

4.3.2 Continuity Test

6. WARRANTY

One year limited warranty, excluding batteries and fuses. For details see Standard Warranty Information in our webpage or you may request a printed copy.

FUNCTION RANGE

Set the FUNCTION switch to / , and RANGE switch to 2K/ / position, connect test leads across the circuit to be tested.

If resistance is less than approximately 100, the buzzer will be activated.

4.3.3 Display Hold

A push button switch at the back of the unit is used to hold display readings during measurements. Pressing and holding the button, holds the display reading. Releasing the button will resume normal operation.

General Technologies Corp.

#121 - 7350 72nd Street Tel.: (604) 952-6699 Delta, BC V4G 1H9 Fax: (604) 952-6690 Canada www.gtc.ca