Klein Tools CL312 Clamp Meter,...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$157.09
$107.09
Klein Tools CL312 Clamp Meter, HVAC Digital AC Auto-Ranging Tester, 400 Amp with Temp

Klein Tools CL312 Clamp Meter, HVAC Digital AC Auto-Ranging Tester, 400 Amp with Temp

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Model: CL312
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$157.09
$107.09
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Clamp Meter, HVAC Digital AC Auto-Ranging Tester, 400 Amp with Temp

  • Warnings

    • Follow all instructions, cautions and warnings attached to and /or packed with all test and measurement devices before each use.
    • Before each use verify meter operation by measuring a known voltage or current.
    • Do not use the meter during electrical storms or in wet weather, and do not use the meter or test leads if they appear to be damaged.
    • Do not attempt to measure resistance or continuity on live circuits.

  • Features

    • Measures AC current via the clamp and AC/DC voltage, DC microamps, resistance, continuity, frequency, capacitance and test diodes via the test leads
    • Powers off automatically after 15 minutes of non-use to conserve battery life
    • Built to withstand a 3.3-Foot (1 m) drop
    • Backlit display for clear readings
    • Meets requirements for use in basic and controlled electromagnetic environments like residential, office and light-industrial locations
    • Includes a carrying case, test leads and 3 x AAA batteries
    • Clamp Meter with automatically ranging true mean squared (TRMS) technology for increased accuracy
    • Thermocouple probe measures temperature
    • CAT III 600V, Class 2, Double insulation safety rating
    • Low battery indicator and easily accessible battery compartment


CL312 - spec sheet

Manufacturer Resources

Product Specs

Ac Voltage:
600
Accessories:
69140, 69142, 69144, 69146, 69409,
Auto Power Off:
Yes
Batteries:
3 x AAA
Capacitance:
4000µF
Current:
400A AC
Dc Micro Amp:
200 μA
Dc Polarity Indicator:
Yes
Dc Voltage:
600
Display:
4000 Count LCD
Drop Protection:
3.3' (1 m)
Frequency:
10Hz - 1 MHz
Jaw Size:
1.12" (2.9 cm)
Ohms Resistance :
40MΩ
Overall Height:
1.61" (4.1 cm)
Overall Length:
8.7" (22.1 cm)
Overall Width:
3.02" (7.7 cm)
Replacement Parts:
69401, 69410,
Standard:
CAT III 600V; CE Certified
Style Name:
DC microAmps, Temp, Cap, TRMS
Temperature Range:
-40° to 1832°F (-40° to 1000°C)
Department:
Electrical
Product Group:
Test & Measurement
Product Subgroup:
Electrical Testers
Product Type:
Voltage, Current, Resistance, Continuity
Product Voltage:
600V AC; 600V DC
Product Function:
AC current, AC/DC voltage, DC micro-Amps, resistance, continuity, frequency, capacitance and test diodes.
Product Details:
Voltage, Current, Resistance, Continuity
Product Material:
ABS
Product Weight:
10.1 oz (286 g)

Klein Tools CL312 – Frequently Asked Questions

1) Will the Klein CL312 clamp meter fit around a 1-inch conductor or a service cable?
The jaw opening on the CL312 is 1.12 inches (2.9 cm), so a single conductor up to about an inch across drops in fine. Larger service entrance cable or a bundled set of conductors will not fit the jaw, and you would need a meter with a bigger clamp or a flexible current probe for that.
2) Does the Klein CL312 measure DC amps?
No. The clamp measures AC current only, up to 400A. On the test leads it will read DC microamps up to 200 uA, which is what you need for flame rectification sensors on furnaces, but it will not clamp DC load current on a battery bank or solar string. For that you need a meter with a DC-capable Hall effect clamp.
3) Can I use the CL312 to check a furnace flame sensor microamp signal?
Yes, that is one of the reasons this one is sold as an HVAC meter. It reads DC microamps to 200 uA through the test leads, so you can put it in series with the flame sensor lead and read the rectification current. It also has a DC polarity indicator, so you will know if your leads are reversed.
4) Is the CL312 rated for work in a commercial panel?
It carries a CAT III 600V rating and is CE certified, with Class 2 double insulation. CAT III 600V covers distribution level work such as panelboards, feeders and hardwired equipment at up to 600V. It is not rated CAT IV, so service entrance and utility connection work is outside its rating.
5) Can the CL312 test a run or start capacitor on a condenser unit?
Yes. Capacitance measurement goes up to 4000 uF through the test leads, which covers both run capacitors (typically single digit to around 100 uF) and start capacitors. Discharge the capacitor and disconnect it from the circuit before testing.
6) What temperature range does the CL312 thermocouple cover, and is it enough for HVAC supply and return readings?
The thermocouple probe reads -40 to 1832 degrees F (-40 to 1000 degrees C). That easily covers supply and return air splits, refrigerant line temps and freezer work at the low end, and goes high enough for flue gas and heat exchanger surface checks.
7) What comes in the box with the Klein CL312?
The CL312 ships with a carrying case, test leads and 3 AAA batteries. A thermocouple probe is part of the package for the temperature function. Nothing else is needed to start using it.
8) Do I need to pick a range on the CL312 before taking a reading?
No, it auto-ranges. It also uses true RMS measurement, so readings stay accurate on the distorted waveforms you get from VFD driven motors, ECM blowers and electronic ballasts, where an averaging meter would read low.
9) What are the voltage and resistance limits on the CL312?
Voltage measurement tops out at 600V AC and 600V DC through the leads, and resistance reads to 40 megohms. Frequency covers 10 Hz to 1 MHz, useful for checking VFD output and control signal frequencies. Readings show on a 4000 count backlit LCD.
10) How durable is the CL312 for daily truck and rooftop use?
The housing is ABS and it is built to survive a 3.3 foot (1 m) drop. At 10.1 oz (286 g) and 8.7 x 3.02 x 1.61 inches it fits a tool pouch without much bulk. Auto power off after 15 minutes of non-use keeps the batteries from draining when it gets tossed in a bag switched on.
11) Can I get replacement test leads for the Klein CL312?
Yes. Klein lists replacement parts 69401 and 69410 for the CL312, and compatible accessories under part numbers 69140, 69142, 69144, 69146 and 69409.
How fast can I get the Klein Tools CL312 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the Klein Tools CL312 come with a warranty?
Absolutely. The Klein Tools CL312 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the Klein Tools CL312?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
Why buy the Klein Tools CL312 from ZenSupply?
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