Cen Tech Automotive Meter 95670 Manual

The Cen Tech 95670 is a versatile digital multimeter designed for automotive diagnostics and general electrical testing. It features a large LCD display, multiple measurement functions (AC/DC voltage, current, resistance, continuity, diode test, transistor hFE), overload protection, data hold, and auto power-off. Powered by a 9V battery, it includes test leads, a carrying case, and an instruction manual. Below are key sections for safety, features, operation, measurement procedures, maintenance, and troubleshooting.

1. Features at a Glance 2. Safety Precautions 3. Parts Identification 4. Specifications 5. Getting Started 6. Measurement Procedures 7. Special Functions 8. Battery Replacement 9. Care & Maintenance 10. Warranty Information 11. Troubleshooting

Features at a Glance

Key components: Digital LCD display, Function selector dial, Input jacks, Test leads, Data hold button, Transistor test socket.

Feature	Description
Large LCD display	3½ digit, 2000 count display with backlight
Function selector	Rotary switch for selecting measurement modes
Input jacks	COM, VΩmA, and 10A for test lead connections
Test leads	Red and black insulated leads with probes
Data hold	Freezes displayed reading
Continuity buzzer	Audible tone for circuit continuity
Diode test	Measures forward voltage drop of diodes
Transistor hFE	Tests transistor DC current gain
Auto power-off	Conserves battery after 15 minutes of inactivity
Overload protection	Fused protection for current measurements

Safety Precautions

Read all safety information before use. This meter is designed for indoor use.

Do not use if meter or test leads are damaged.
Do not measure voltage above 600V DC or AC RMS.
Use proper terminals, function, and range for measurements.
Disconnect test leads from circuit before changing function.
Replace battery when low battery indicator appears.

WARNING! Risk of electric shock. Do not use on circuits exceeding 600V. Use caution when working with high voltage.

Parts Identification

Front panel layout and control functions.

LCD Display: Shows measurement values, symbols, and warnings.
Rotary Switch: Selects measurement function and range.
Input Jacks: COM (common), VΩmA (voltage/resistance/current up to 200mA), 10A (current up to 10A).
Data Hold Button: Press to freeze display reading.
Transistor Test Socket: For testing NPN and PNP transistors.
Battery Compartment: Holds 9V battery (not included).

CAUTION! Ensure rotary switch is set to correct function before connecting to circuit.

Specifications

Display: 3½ digit LCD, 2000 counts.
DC Voltage: 200mV to 600V, ±(0.5%+2 digits).
AC Voltage: 200V to 600V, ±(1.2%+5 digits).
DC Current: 200µA to 10A, ±(1.0%+2 digits).
Resistance: 200Ω to 2MΩ, ±(0.8%+3 digits).
Continuity: Audible buzzer if resistance < 50Ω.
Diode Test: Displays forward voltage drop.
Transistor hFE: Tests NPN/PNP transistors.
Power: 9V battery (6F22 or equivalent).
Operating Temp: 0°C to 40°C (32°F to 104°F).

Getting Started

Insert battery and connect test leads.

Open battery compartment on back, insert 9V battery.
Connect black test lead to COM jack.
Connect red test lead to VΩmA jack for most measurements.
For current measurements above 200mA, move red lead to 10A jack.
Turn rotary switch to desired function.

Tip: Always start with highest range if unknown value, then switch to lower range for better accuracy.

Measurement Procedures

Step-by-step instructions for common measurements.

DC Voltage: Set to V⎓, connect leads in parallel to circuit.
AC Voltage: Set to V~, connect leads in parallel.
DC Current: Set to A⎓, connect leads in series with circuit.
Resistance: Set to Ω, ensure circuit is powered off.
Continuity: Set to •))) symbol, test for audible tone.
Diode Test: Set to diode symbol, connect to diode.
Transistor hFE: Set to hFE, insert transistor in correct socket.

WARNING! Never connect meter to powered circuit when set to current or resistance mode.

Special Functions

Data Hold: Press HOLD button to freeze reading. Auto Power-Off: Meter turns off after 15 minutes; press any button to wake. Low Battery Indicator: "BAT" appears when battery needs replacement.

Battery Replacement

Replace 9V battery when low battery indicator appears.

Turn meter off and disconnect test leads.
Remove screw from battery compartment cover.
Replace old battery with new 9V battery.
Replace cover and secure screw.

CAUTION! Dispose of old battery properly according to local regulations.

Care & Maintenance

Clean meter with dry cloth only. Store in carrying case when not in use.

CAUTION! Do not expose to extreme temperatures, moisture, or direct sunlight.

Warranty Information

Cen Tech 95670 comes with a 1-year limited warranty covering defects in materials and workmanship. Warranty does not cover damage from misuse, accidents, or unauthorized modifications. For warranty service, contact Harbor Freight Tools at 1-800-444-3353 or visit www.harborfreight.com. Keep original receipt as proof of purchase.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No display	Dead battery	Replace 9V battery.
Inaccurate readings	Low battery/wrong range	Replace battery; select proper range.
Continuity buzzer not working	High resistance/open circuit	Check circuit continuity; resistance must be < 50Ω.
Meter turns off automatically	Auto power-off feature	Press any button to wake; disable by holding HOLD while turning on.
Display shows "OL"	Overload/out of range	Select higher range; check circuit voltage/current.

Reset: Remove battery for 30 seconds, then reinstall.

Service: 1-800-444-3353; www.harborfreight.com