General Technologies CT8022 Ergonomic Autorange Digital Multimeter User Manual

Ct8022, Safety rules, International symbols

1. SAFETY 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 fingers behind the finger 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 600 VDC or 600V 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

Dangerous Voltages

see manual

Continuity

Ground

Double Insulation

3. TECHNICAL SPECIFICATIONS

3.1 General Specifications

Display: 3-3/4 digits LCD, max. of 3999 display
with

decimal point and engineering units

Polarity: Automatic, (-) negative polarity indication
Zero adjustment: Automatic
Sample rate: 0.5 Sec.
Over range indication: reading

“

”

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. 160g (including battery).
Accesories: User’s Manual, Alligator Clip, Probes
Cups and 9V alkaline battery

3.2 Electrical Specifications

•

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

4. OPERATION

4.1 Instrument Description

1) Case
2) 3-3/4 Digit LCD display
3) ON/OFF and Range switch
4) Function switch
5) Fixed test lead with probe
6) Fixed probe tip and fuse cap
7) Battery cover
8) Display hold push button (back of the unit)
9) Probes cups
10) Alligator clip

Function

Range

Accuracy

Input

Impedance

Remarks

Overload

Protection

DC Voltage

4000mV, 60V

600V

0.8%+1

10 MΩ

600 Vp-p

AC Voltage

4000mV, 60V

600V

1.2%+3

10 MΩ

40~400Hz

600 Vp-p

DC Current

40 - 400 mA

1.2%+3

400 mA/

250V Fuse

AC Current

40 - 400 mA

1.2%+5

40~400Hz

400 mA/

250V Fuse

General Technologies Corp.

CT8022

Autorange Ergonomic Handheld Multimeter

4.2 Display Description

4.3 Measurement Procedures

CAUTION: Maximum Input Voltage is 600Vrms,do not exceed

this rating to avoid personal injuries or damage to
the instrument. The range FUNCTION/RANGE

switch should be set to the range you want to test
before the operation.

CAUTION: Always ensure that the correct terminals are used

for the type of measurement to be made. Avoid
making connections to “live” circuits whenever
possible.When making current measurements en-
sure that the circuit is not “live” before opening it in
order to connect the test leads.

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Function

Range

Accuracy

Input

Impedance

Remarks

Overload

Protection

Resistance

400Ω, 4kΩ,

40kΩ,400kΩ

4MΩ

1.0%+2

1.2 mA

max. test

current

250 Vp-p

40 MΩ

1.5%+2

0.47 mA

max. Test

current

250 Vp-p

Diode Test

Test Current:1.0± 0.6mA

Test Voltage: 3.2 V Max.

250 Vrms

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