MT-1/WT3 | Portable Wh Meter Tester
Three-Phase and Single-Phase Wireless High-Accuracy Field Tester
Safe and fast results, no “strings” attached…
The latest generation of portable meter testers with built-in Wi-Fi technology provides precise data measurement. Our wireless socket-type device, with its dead-front design, attaches quickly and securely to the meter base.
- Powered by a built-in 3-phase phantom load of synthesized 50 A current and an integrated, highly precise watthour standard
- 3-phase reference standard at 0.02% accuracy
- NIST-traceable
- Autodetects various meter forms
- Control the MT-1/WT3 wireless meter tester with the Probewell Connect 2.0 app via the built-in private WiFi network
SKU: WT3
Big technological leaps come in small packages…
Weight: 6.4 lb. | Size: 6.9″ X 6.7″
MT-1/WT3 | Description
Easily acquire accurate measurements wirelessly
Like all our wireless products, the meter tester can be paired with a mobile device in seconds by scanning its QR code, when using Probewell Connect 2.0.
Highly Compatible
You can test residential, commercial and industrial single and three-phase meters. Easily configurable with twist & lock removable tabs, you will be able to test both solid state and electromechanical meters.
Single-phase: 1S, 2S, 3S, 4S, 12S(N) and 25S
Three-phase: 6S, 8S, 9S, 12S, 14S, 15S, 16S, 36S, 46S and Fitzall™
Class: 10, 20, 100, 200, 320**
Compatible Forms Supported by the MT-1/WT3 meter tester
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Meter Form |
1S |
2S |
3S |
4S |
5S |
6S |
8S |
9S |
12S |
14S |
15S |
16S |
Aclara® Fitzall ™ |
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35S |
36S |
25S |
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45S |
46S |
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Meter Tester |
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Self-Contained |
CT-Rated |
Self-Contained |
CT-Rated |
Self-Contained |
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a |
a |
a |
a |
a |
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a |
a |
a |
a |
a |
a |
a |
a |
a |
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Available tests
Quick Test
KYZ Test
Portable Wh Meter Tester
Three-phase and Single-phase Wireless High-Accuracy Field tester
Big technological leaps
come in small packages…
Weight: 6.4 lb. | Size: 6.9″ X 6.7″
Safe and fast results, no “strings” attached…
The latest generation of portable meter testers with built-in Wi-Fi technology provides precise data measurement. Our wireless socket-type device, with its dead-front design, attaches quickly and securely to the meter base.
- Powered by a built-in 3-phase phantom load of synthesized 50 A current and an integrated, highly precise watthour standard
- 3-phase reference standard at 0.02% accuracy
- NIST-traceable
- Autodetects various meter forms
- Control the MT-1/WT3 wireless meter tester with the Probewell Connect 2.0 app via the built-in private WiFi network
SKU: WT3
MT-1/WT3 | Description
Easily acquire accurate measurements wirelessly
Like all our wireless products, the meter tester can be paired with a mobile device in seconds by scanning its QR code, when using Probewell Connect 2.0.
Available tests
KYZ Test
Compatible Forms Supported by the MT-1/WT3 meter tester
You can test residential, commercial and industrial single and three-phase meters. Easily configurable with twist & lock removable tabs, you will be able to test both solid state and electromechanical meters.
Single-phase: 1S, 2S, 3S, 4S, 12S(N) and 25S
Three-phase: 6S, 8S, 9S, 12S, 14S, 15S, 16S, 36S, 46S and Fitzall™
Class: 10, 20, 100, 200, 320**
MT-1/WT3 | Technical Specifications
| COMPATIBLE METERS | |
| Single-Phase | 1S, 2S, 3S*, 4S, 12S(N) and 25S |
| Three-Phase | 6S, 8S, 9S, 12S, 14S, 15S, 16S, 36S, 46S and Fitzall™ |
| Class | 10, 20, 100, 200, 320** |
| COMPATIBLE DEVICES | |
| Operating systems | IOS®, Android®, Windows® |
| TEST SOCKET | |
| Input Voltage | 100 – 600VAC |
| Line Frequency | 58 – 62Hz |
| Power Consumption | 75VA (maximum) |
| Circuit Breakers | 2 x 1A (press-to-reset mechanism) |
| CURRENT SYNTHESIZERS | |
| Adjustable Current | 0.25 to 50A |
| Phase Angle (Wh) | Unity and 60° Lag |
| Phase Angle (VARh) | 90° and 30° Lag |
| INTERNAL 3-PHASE WATTHOUR STANDARD | |
| Typical Accuracy | ±0.02% |
| Guaranteed Accuracy | ±0.05% |
| ENVIRONMENT | |
| Operation Temperature | -4° to 140°F (-20° to 60°C) |
| Storage Temperature | -4° to 140°F (-20° to 60°C) |
| Humidity | 5% to 95% (non condensing) |
| PHYSICAL DIMENSIONS | |
| Test Socket (Diam. x L) | 6.9” x 7.7” |
| WEIGHT | |
| Test Socket | 6.4 lb |
| WARRANTY | |
| Parts and Labor | 2-years limited*** |
| ADVANCED FEATURES | |
| Wh/VARh | |
| Reverse Flow Test for bidirectional meters | |
| Line Monitor | |
| KW Demand Test | |
| Creep Test | |
| INCLUDED | |
| Carrying bag | Update cable |
| User’s manual | Probewell Connect App. |
| Quick Start Guide | 2 Removable Twist Tabs |
| Calibration report | |
*An adapter is required to verify 3S Sensus Meter.
**An adapter may be required depending on the meter installation.
***Only applicable to units shipped to Canada or USA. 1-year warranty for other countries.
Support
Support
Frequently Asked Question
1. What is a portable Wh meter tester used for?
A portable Wh meter tester like the MT-1/WT3 is used to check the accuracy and performance of electric meters in the field. It verifies energy measurement in residential, commercial, and industrial settings without removing the meter.
2. How do you test a single-phase or three-phase energy meter?
You can test single-phase and three-phase meters using the MT-1/WT3. It is inserted directly into the meter socket and performs automated accuracy tests using only the Probewell Connect 2.0 mobile app.
3. Can I test electric meters without connecting wires?
Yes. The MT-1/WT3 supports fully wireless field testing. It uses built-in WiFi and is operated through the Probewell Connect 2.0 app, eliminating wired connections during testing.
4. What does it mean when a meter tester is NIST-traceable?
A NIST-traceable meter tester ensures its accuracy has been verified against national standards set by the National Institute of Standards and Technology (NIST), providing reliable and certified results.
5. What is a 3-phase phantom load in meter testing?
A 3-phase phantom load simulates real-world current to test electric meters without needing live load connections. The MT-1/WT3 has a built-in 50A phantom load for safe and reliable testing.
