Guaranteed Fitment
Always the correct part
have questions?
Always the correct part
We know our products
Fast & Reliable
Availability: 6 to 7 Weeks
Simpler, faster earth ground tests than ever before. With internal memory storage of up to 1500 records, users can have a faster setup made easy with the new color-coded wires that help eliminate mistakes.
Features
Applications
Complete three-phase voltage and current measurements 50% faster! We're confident in this because it's been tested at customer sites. The new clamp meters from Fluke (models 377 FC & 378 FC) feature FieldSense™ technology where voltage and current can be measured simultaneously with the clamp jaw. Meaning, these clamp meters can be used to make sequential line-to-ground measurements and current measurements that result in calculated line-to-line voltage measurements and phase rotation information.
In this application note, we walk you through the old versus the new way of doing phase-to-phase measurements along with step-by-step instructions on how to make these measurements.
| Temperature Range | |
| Operating Temperature | 14 to 122°F (-10 to 50°C) |
| Storage Temperature | -22 to 140°F (-30 to 60°C) |
| Temperature Coefficient | ±0.1% of reading/°C <18°C >28°C |
| Error | Intrinsic: Refers to the reference temperature range and is guaranteed for one year Operating: Refers to the operating temperature range and is guaranteed for one year |
| Climatic Class | C1 (IEC 654-1), 23 to 115°F (-5 to 45°C), 5 to 95% RH |
| Protective Type | IP56 for case, IP40 for battery door according to EN60529 |
| Safety | Protection by double and/or reinforced insulation maximum 50 V to earth. IEC61010-1: 300V CAT II, Pollution degree two |
| EMC (Emission Immunity) | IEC61326-1: Portable |
| Quality System | Developed, designed, and manufactured according to DIN ISO 9001 |
| External Voltage | V external, maximum = 24 V (dc, ac <400 Hz), measurement inhibited for higher values |
| V Ext Rejection | >120 dB (16²⁄3, 50, 60, 400 Hz) |
| Measuring Time | Typical six seconds |
| Maximum Overload | 250 V rms (pertains to misuse) |
| Auxiliary Power | 6 x 1.5 V Alkaline (type AA LR6) |
| Battery Life Span | Typical >3000 measurements |
| RA 3-Pole Ground Resistance Measurement (IEC 1557-5) | |
| Switch Position | RA 3-pole |
| Resolution | 0.001 to 10 Ω |
| Measuring Range | 0.020 Ω to 19.99 kΩ |
| Accuracy | ±(2% rdg + 3 d) |
| Operating Error | ±(5% rdg + 3 d) |
| Measuring Principle: Current/Voltage Measurement | |
| Measuring Voltage | Vm = 48 V ac |
| Short-Circuit Current | >50 mA |
| Measure Frequency | 128 Hz |
| Probe Resistance (RS) | Maximum 100 kΩ |
| Auxiliary Earth Electrode Resistance (RH) | Maximum 100 kΩ |
| Additional Error from RH and RS | RH[kΩ]RS[kΩ]/RA[Ω]0.2% |
| RA 4-Pole Ground Resistance Measurement (IEC 1557-5) | |
| Switch Position | RA 4-pole |
| Resolution | 0.001 to 10 Ω |
| Measuring Range | 0.020 Ω to 19.99 kΩ |
| Accuracy | ±(2% rdg + 3 d) |
| Operating Error | ±(5% rdg + 3 d) |
| Measuring Principle: Current/Voltage Measurement | |
| Measuring Voltage | Vm = 48 V ac |
| Short-Circuit Current | >50 mA |
| Measure Frequency | 128 Hz |
| Probe Resistance (RS + RES) | Maximum 100 kΩ |
| Auxiliary Earth Electrode Resistance (RH) | Maximum 100 kΩ |
| Additional Error from RH and RS | RH[kΩ]RS[kΩ]/RA[Ω]0.2% |
| Monitoring of RS and RH with error indicator. Automatic range selection. | |
| RA 3-Pole Selective Ground Resistance Measurement with Current Clamp (RA with Clamp) | |
| Switch Position | RA 3-pole with clamp |
| Resolution | 0.001 to 10 Ω |
| Measuring Range | 0.020 Ω to 19.99 kΩ |
| Accuracy | ±(7% rdg + 3 d) |
| Operating Error | ±(10% rdg + 5 d) |
| Measuring Principle: Current/Voltage Measurement (with External Current Clamp) | |
| Measuring Voltage | Vm = 48 V ac |
| Short-Circuit Current | >50 mA |
| Measure Frequency | 128 Hz |
| Probe Resistance (RS) | Maximum 100 kΩ |
| Auxiliary Earth Electrode Resistance (RH) | Maximum 100 kΩ |
| Monitoring of RS and RH with error indicator. Automatic range selection. Measurement is not performed if the current through the current clamp is too low. | |
| RA 4-Pole Selective Ground Resistance Measurement with Current Clamp (RA with Clamp) | |
| Switch Position | RA 4-pole with clamp |
| Resolution | 0.001 to 10 Ω |
| Measuring Range | 0.020 Ω to 19.99 kΩ |
| Accuracy | ±(7% rdg + 3 d) |
| Operating Error | ±(10% rdg + 5 d) |
| Measuring Principle: Current/Voltage Measurement (with External Current Clamp) | |
| Measuring Voltage | Vm = 48 V ac |
| Short-Circuit Current | >50 mA |
| Measure Frequency | 128 Hz |
| Probe Resistance (RS) | Maximum 100 kΩ |
| Auxiliary Earth Electrode Resistance (RH) | Maximum 100 kΩ |
| Monitoring of RS and RH with error indicator. Automatic range selection. Measurement is not performed if the current through the current clamp is too low. | |
| Stakeless Ground Loop Measurement (2 Clamps) | |
| Switch Position | RA 4-pole 2 clamps |
| Resolution | 0.001 to 10 Ω |
| Measuring Range | 0.020 Ω to 19.99 kΩ |
| Accuracy | ±(7% rdg + 3 d) |
| Operating Error | ±(10% rdg + 5 d) |
| Measuring Principle: Stakeless Measurement of Resistance in Closed Loops Using Two Current Transformers | |
| Measuring Voltage | Vm = 48 V ac |
| Measure Frequency | 128 Hz |
| Noise Current (IEXT) | Maximum IEXT = 10 A (ac) (RA <20 Ω) |
| General Specifications | |
| Display | 1999 Digit LCD: Display with special symbols, digit height 25 mm, fluorescent backlight |
| User Interface | Instant measurement through TURN and START one button concept. The only operating elements are rotary switch and START button |
| Robust, Water and Dust Resistant | Instrument is designed for tough environmental conditions (rubber protective cover, IP56) |
| Memory | Internal memory storage up to 1500 records accessible via USB port |
| Dimensions | 9.75 x 5.25 x 7.35" (250 x 133 x 187 mm) |
| Weight | 2.43 lbs (1.1 kg) including batteries 16.8 lbs (7.6 kg) included accessories and batteries in carrying case |
Everything you need to know about orders, cancellations, refunds, and delivery.
EquipTestPro ships to both Canada and the United States. We are pleased to serve customers across North America with reliable, trackable delivery options.
When you place an order, a flat-rate shipping charge will be applied at checkout based on your order. The applicable rate will be clearly displayed before you complete your purchase.
Flat-rate shipping is calculated to reflect the cost of reliable, insured delivery. The rate shown at checkout is final — no hidden surcharges will be added after your order is placed.
For certain items, shipping costs are calculated based on the weight of the product. The weight of any weight-based item is listed on its product detail page.
For example, an item weighing 3.2 lbs will be rated at 4 lbs for shipping calculation purposes. This policy is standard practice across all major carriers we work with.
Some products sold on EquipTestPro are subject to shipping restrictions due to regulatory, carrier, or safety requirements. These include but may not be limited to:
Where restrictions apply, this will be clearly noted on the product listing. If you have questions about a specific product's shipping eligibility to your location, please contact us before placing your order.
Orders are processed on business days (Monday through Friday, excluding statutory holidays). Orders placed after business hours or on weekends will begin processing the following business day.
You are entitled to cancel your Order within 30 days of receipt without providing a reason, subject to the processing fee structure described below.
The cancellation deadline is 30 days from the date on which you received the Goods, or on which a third party appointed by you (other than the carrier) takes possession of the delivered product.
To exercise your cancellation right, notify us with a clear written statement by:
The following fee structure applies to all cancellations. Please review carefully before requesting a cancellation.
A processing fee of 10% of the total order value will be withheld from your refund to cover payment processing, handling, and administrative costs.
If we cancel your order due to item unavailability, no processing fee will be withheld. You receive a full refund of the amount paid.
Refunds will be issued using the same payment method as the original purchase. No additional fees beyond those described above will be applied.
To be eligible for a return, all of the following conditions must be met:
We reserve the right to refuse returns of any merchandise that does not meet the above conditions, at our sole discretion.
The following items are not eligible for return under any circumstances:
You are responsible for the cost and risk of returning Goods to us. Before sending any items, please contact us at info@equiptestpro.com to obtain the return shipping address.
You should expect to receive your refund within four (4) weeks of delivering your return package to the shipper. In many cases, refunds are processed sooner. The timeline breaks down as follows:
We will process refunds no later than 14 days from the day we receive the returned Goods, using the same payment method as your original purchase.
If the Goods were marked as a gift at the time of purchase and shipped directly to you, a gift credit equal to the return value (less any applicable processing fee) will be issued. Once the returned product is received and inspected, a gift certificate will be mailed to you.
If the Goods were not marked as a gift at purchase, or if the gift giver had the order shipped to themselves first, the refund will be issued to the original purchaser.
Reach out to our support team for assistance with any order or return.
Not Applicable
| Condition: | NA |
Defective new equipment may be returned for warrantyrepair/exchange to us within (5) days of the shipment receipt date. After five (5) days, returns will be handled by direct contact and in accordance with the warranty terms of the item's manufacturer. Items that have malfunctioned due to mishandling, electrical overload, etc., will be subject to repair charge.
Non defective new equipment will be authorized for return within five (5) days of the shipment receipt date if the equipment is still in new, re-sellable condition with the original manual(s), accessories, packing material and carton. We reserve the right to reject returnsin which there is no original packaging, missing accessories, damage or visible signs of usage of the item. A restocking fee of up to 25% of purchase price may apply. Special orders and dangerous goods are non-returnable.
(Do not write anytingon the manufacturer's original package or use as a shipping carton. Include all accessories, manuals and warranties.)
Please, include a copy of the packing list or invoice with a reason for the return. Your return authorization number is valid for thirty (30) days.