True RMS Clamp Meter with Temperature, Capacitance and Backlight - All-in-one HVACR meter - model SC77
The SC77 is one of our most popular digital multimeters for a reason. It has virtually every parameter for electrical and thermal HVACR testing in one meter. This auto ranger includes a host of safety features including a high-voltage LED and beeper, a continuity warning, push button non-contact voltage (NCV), a lead holder with detachable leads, and alligator probe tips for easy one-handed testing. As far as ranges go, it has temperature, capacitance, microamps DC for flame diode tests, and everyday electrical ranges for HVACR. Not to mention technicians tell us it is one of the most durable meters in the industry.
You can tell the difference simply by putting the Fieldpiece SC77 in your hand. It’s a natural fit; the Fieldpiece SC77 feels solid and has a bit of balanced weight to it. Add to that True RMS and virtually every electrical parameter the user is going to need for HVAC/R field service. Add to that temperature and the fact that it works with Fieldpiece accessory head instruments, and finally add to that built-in safety features, detachable leads, and warnings, and the Fieldpiece SC-77 is a powerful, affordable meter.
Designed specifically for HVAC/R field service, the Fieldpiece SC77 is a dedicated DMM and offers specific features and benefits to HVAC/R field service pros including:
Works with Fieldpiece Accessory Heads
There is a Fieldpiece accessory head available for just about any job. There are heads to measure temperature, superheat, subcooling, RH%, wet bulb, dew point, vacuum (microns of mercury), manometer (inches of water column), amps AC&DC, high voltage, CO, %CO2, air velocity, and many more.
With the NCV tab on the tip of the clamp close to an AC voltage, press and hold the NCV button. The NCV LED will light with an analog feel and the beeper will beep. The closer you get to AC voltage, the louder the beep. The NCV function is sensitive enough to detect 24VAC on thermostats (24V to 600V, 50Hz to 60Hz).
High Voltage and Continuity Indicators
If the user is using the High Voltage and Continuity Indicators while doing lab testing, these features would probably drive you crazy. Fieldpiece took input from more than one HVAC/R veteran in order to make sure that these features really remind the user of what they're doing and they’ve avoided potentially dangerous situations in the field. The Hi-V LED and beeper let you know when you’ve hooked up to a circuit over 30V. The continuity LED and beeper tells the user if a circuit is open or closed.
Using the built-in amp clamp, the user can use the Fieldpiece SC 77 to read 0-200 amps directly on your meter with 0.1 resolution.
With the Fieldpiece SC76, users can measure microfarads on motor-run and motor-start capacitors using the Capacitance range. To use, first disconnect the capacitor from power first, then Short the terminals to discharge the capacitor. Disconnect any resistors that might be between the terminals of the capacitor and measure to check for degradation.
Take ambient air or refrigeration line temperatures and more with the built-in K-type port and the included the Fieldpiece ATB1 wrap tab thermocouple. Add a wet sock (saturated tissue or a shoelace to take wet bulb temperatures. The built-in temperature junction offers great temperature compensation for more accurate and faster measurements.
Microamps DC - Flame Rectification Tests
The most common "no heat" call has to do with a malfunctioning flame sensing diode. Simply turn the Fieldpiece SC76 Clamp Meter to microamps DC, hook up, and see if the flame sensing rod is functioning properly.
Digital multimeters use two different types of AC sensing. The most common is average sensing, normalized to a true RMS value of a sine wave. The other is true RMS sensing. The actual true RMS value is sensed for a wave form within the limits of the crest factor. Either sensing method will give the same results on a clean sine wave but they may differ on a non-sinusoidal waveform.
Silicone Leads with Detachable Probe Tips
Because the wire insulation is silicone, the leads stay flexible in cold weather and will not melt if bumped by a soldering iron. Use the attached lead clip on the to help the user perform a one-hand test more easily than most meters on the market. Built-in lead storage makes it easy to keep everything together from job to job. Fieldpiece's Deluxe Silicone Lead Kit, model ADK7, is an optional purchase from your favorite distributor and makes one-handed testing even easier.
Wire Grabbing Jaw
The Fieldpiece SC 76's fixed jaw is longer than the moveable jaw to make it easier to select just one wire from a bundle. With the jaws closed, separate one wire using the long fixed jaw then slide it to the corner where the two jaws meet; Finally, open the jaws to let it in. Now you can select the wire without holding the jaws open.
Bright Blue Backlight
Easily read the display in overcast conditions or in dimly lit areas.
The HOLD button is easily pressed while holding the mini clamp meter naturally in your hand. The Fieldpiece SC-76 holds any reading on your meter so you can concentrate on the test points and look at the LCD after the user has disconnected.
For DC voltage, set the meter to the VDC parameter instead of VAC as shown below. For all ranges and functions choose a range just above the value you expect. If display reads "OL" (overload), select a higher range. If display shows less than three numbers, select a lower range for better resolution.
How Does it Work?
The SC77 is an auto ranging DMM that with a dedicated amp clamp and a bright blue backlight for added visibility in dimly lit areas. Use the NCV button to determine whether on not a wire or circuit is live. The high-voltage indicators alert you when hooking up to 30V or more, while the continuity indicators tell you if a circuit is open or closed. Operation of the SC77 is very intuitive. Simply select a range and test. The display automatically shows you the appropriate range for the parameter being tested on the large LCD, An “OL” message warns you that the test is out of range for the meter.
The following is a look at all of the functions found the SC77 Dual Display DMM for HVAC/R. For DC voltage, set the meter to the VDC parameter instead of VAC.
You can tell the difference simply by putting the SC77 in your hand. It’s a natural fit; it feels solid and has a bit of balanced weight to it. Add to that True RMS and virtually every electrical parameter you’re going to need for HVAC/R field service. Add to that temperature. Add to that the fact that it works with Fieldpiece accessory head instruments. Still add to that built-in safety features, detachable leads, and warnings.
We designed this meter to be the best clamp meter for HVAC/R. The feedback we’ve gotten from you guys in the field seems to tell us we’ve done just that. Talk is cheap. Go hold one and decide for yourself.