General Technologies Corp CT8012 Manual

1. SAFE TY RULES
This meter is designed for indoor use at temperatures between 0°C to 40°C and
•
altitudes up to 2,000m.
• To ensure that the meter is used safely, follow all safety and operating instructions in
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
the meter is not operating properly.
• When using the instrument, keep your fi ngers behind the fi nger guards on the plastic
casing and probes.
• Disconnect the live test lead before disconnecting the common test lead.
• Make sure power is off before cutting, desoldering, or breaking the circuit wires. Small
amounts of current can be dangerous.
• Do not apply more than 500 VDC or 500V AC rms between a terminal and ground.
• To avoid electrical shock, use CAUTION when working above 60V DC or 25V AC
rms. Such voltages pose a shock hazard.
• Never make measurements with the battery cover off.
• To avoid electrical shock or damage to the meter, do not exceed the input limits.

2. INTERNATIONAL SYMBOLS

Important information
see manual
AC
DC

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
voltage should not exceed the indicated values. This is to pre-
vent personal injuries and damage to the internal circuitry.
•  The function switches should be set to the function which you
want to test before operation.
•  Accuracies are ±(% of reading + number of least signifi cant
digits) at 23°C ±5°C, less than 75% RH.
Function Range Accuracy
DC Voltage 2000mV,20V, 0.8%+1
200V, 600V
AC Voltage 200V, 600V 1.5%+10
DC Current 200 mA 2.0%+2
Resistance 2k, 20k,
200k,2000k
Diode Test Test Current:1.0± 0.6mA
Continuity Beeps when < 100Ω
Dangerous Voltages
Continuity
Ground
Double Insulation
Input Remarks
Impedance
1 M 
-
450 K 
50~500Hz
-
1%+3 - -
Test Voltage: 3.2 V Max.
3VDC Max. Test Voltage

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)
6

4.2 Measurement Procedures

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

4.2.1 DC Voltage measurement

FUNCTION
Set the FUNCTION switch to
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

Overload
Protection
600 Vp-p
600 Vp-p
200 mA/
FUNCTION
250V Fuse
250 Vp-p Set the FUNCTION switch to
desired position, according to the Function/Range Table.
250 Vrms
Proceed to connect the test leads across the source or load under
measurement, and read the measurement on the LCD screen.
250 Vrms
8012
CT
9 4 1 2
V V mA Ω
MAX
600 V
1 2 3 4 OFF
Ω 250 V
GTC
CT8012
3
5
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.
1 2 3 4 OFF
Ω
V V mA
RANGE
and the RANGE switch to the
1 2 3 4 OFF
Ω
V V mA
RANGE
and the RANGE switch to
8
1 2 3 4
_ _
200 600
V
V 2000m 20 200 600 _
_ _
mA 200
Ω 2K 20K 200K 2000K
7
600V
200V
20V
2000mV
600V
200V