• True RMS clamp meter
• Maximum voltage: 600V AC/DC
• Maximum current: 1000A AC/DC
• 1.57" jaw opening (40mm)
• Testing functions include AC/DC voltage and current, resistance, temperature, capacitance, frequency, continuity, and diode testing

The Techni-Pro TNP401 is a true RMS, auto-ranging clamp meter. It features a 1.57" jaw opening (40mm), a 6000-count backlit digital display, and rugged, double-molded plastic housing.

The TNP401 performs a number of testing functions including AC/DC voltage and current, resistance, temperature, capacitance, frequency, continuity, and diode testing.

Maximum ranges are as follows:

• Voltage: 600V AC/DC
• Current: 1000A AC/DC
• Resistance: 60MΩ
• Temperature: 1400°F
• Capacitance: 4000µF
• Frequency: 10kHz

1. Current clamp

2. Non-contact AC voltage indicator

3. Clamp trigger

4. Data hold/backlight button

5. Function switch

6. Hz % button

7. Range select button

8. Mode select button

9. Relative button

10. MIN/MAX button

11. LCD display

12. COM input

13. V Ω Cap Temp Hz input

14. Battery cover 

1. AC DC

2. Minus sign

3. 6000 count display with 61-segment bar graph

4. Auto range mode

5. Relative mode

6. Diode test mode

7. Continuity

8. Data hold mode

9. Units of measure

10. Min/max mode

11. Frequency/duty cycle mode