MT-1/NT4 | Single-Phase Wh Meter Tester
Perfect for field inspection of electrical meters
In just a few minutes, a watthour meter can be accurately tested onsite by meter shop technicians for periodic sampling or routine inspection. Weighing only 5.3 lb., the MT-1/NT4 can be set to test in one step (Preset mode). the socket-style meter testing device is an ideal testing instrument for routine field testing.
The meter under test is securely controlled by the meter test socket. No wiring connection is needed.
Net metering-enabled
The MT-1/NT4 is a bidirectional meter and can perform reverse power flow testing in solid-state meters devices for net metering installations.
With the commercial 12S meter, the MT1/NT4 meter tester can test two phases either simultaneously or separately.
Small but mighty
Weight: 5.3 lb. | Size: 6.9″ X 7.7″
SKU: NT4
Perfect for field inspection of electrical meters
In just a few minutes, a watthour meter can be accurately tested onsite by meter shop technicians for periodic sampling or routine inspection. Weighing only 5.3 lb., the MT-1/NT4 can be set to test in one step (Preset mode). the socket-style meter testing device is an ideal testing instrument for routine field testing.
The meter under test is securely controlled by the meter test socket. No wiring connection is needed.
Net metering-enabled
The MT-1/NT4 is a bidirectional meter and can perform reverse power flow testing in solid-state meters devices for net metering installations.
With the commercial 12S meter, the MT1/NT4 meter tester can test two phases either simultaneously or separately.
Small but mighty
Weight: 5.3 lb. | Size: 6.9″ X 7.7″
SKU: NT4
MT-1/NT4 | Description
Probewell offers the most advanced portable single-phase watthour meter tester, the MT-1/NT4.
The MT-1/NT4 can test all common residential watthour meter forms: 1S, 2S, 3S, 4S and 12S.
The weight of the MT‑1/NT4 is only 5.3 lb., making it the smallest portable watthour single-phase meter tester available today.
The three loads (HL, PF and LL) are set automatically according to the TA of the meter being tested. Any non-standard current can also be programmed by the user for special requirements.
The MT-1/NT4 also has a reverse power flow testing capability for solid-state meters, meaning that it can perform testing for routine inspections of net metering installations.
Compatible Forms Supported by the MT-1/NT4 meter tester
Probewell offers the most advanced portable single-phase watthour meter tester, the MT-1/NT4.
The MT-1/NT4 can test all common residential watthour meter forms: 1S, 2S, 3S, 4S and 12S.
The weight of the MT‑1/NT4 is only 5.3 lb., making it the smallest portable watthour single-phase meter tester available today.
The three loads (HL, PF and LL) are set automatically according to the TA of the meter being tested. Any non-standard current can also be programmed by the user for special requirements.
The MT-1/NT4 also has a reverse power flow testing capability for solid-state meters, meaning that it can perform testing for routine inspections of net metering installations.
Compatible Forms Supported by the MT-1/NT4 meter tester
|
Meter Form |
1S |
2S |
3S |
4S |
5S |
6S |
8S |
9S |
12S |
14S |
15S |
16S |
Aclara® Fitzall ™ |
||
|
35S |
36S |
25S |
|||||||||||||
|
45S |
46S |
||||||||||||||
|
Meter Tester |
 |
Self-Contained |
CT-Rated |
Self-Contained |
CT-Rated |
Self-Contained |
|||||||||
|
|
a |
a |
a |
a |
|
|
|
|
a |
|
|
|
|
|
|
MT-1/NT4 | Technical Specifications
| COMPATIBLE METERS | |
| Single-Phase | 1S, 2S, 3S*, 4S* and 12S |
| Class | 10, 20, 100, 200, 320 |
| 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 |
| 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) |
| PHYSICAL DIMENSIONS | |
| Test Socket(Diam. x L) | 6.9” x 7.7” |
| Remote Control(Diam. x L) | 8.3” x 3.9″ x 1” |
| Carrying Bag(Diam. x L) | 11” x 11” x 8″ |
| WEIGHT | |
| Test Socket | 5.3 lb |
| Remote Control(Diam. x L) | 0.6 lb |
| Overall with Carrying Bag(Diam. x L) | 8.0 lb |
| WARRANTY | |
| Parts and Labor | 2-years limited*** |
| INCLUDED | |
| Carrying bag | Update cable |
| User’s manual | WTDataOne Software |
| Quick Start Guide | 2 Removable Twist Tabs |
| Calibration report | Remote Control |
* May be incompatible with some 3S and 4S form meters.
***Only applicable to units shipped to Canada or USA. 1-year warranty for other countries.
Support
Support
Frequently Asked Question
1. What is a single-phase watthour meter tester used for?
A single-phase watthour meter tester like the MT-1/NT4 is a portable field tester used to verify the accuracy of residential and small commercial electricity meters onsite within minutes.
2. How can electricity meters be tested safely in the field?
The MT-1/NT4 secures the meter under test using a socket-type connection and its dead-front design, so no wiring is needed, ensuring accurate results and technician safety.
3. Can meter testers check meters for net metering installations?
Yes. The MT-1/NT4 is bidirectional and supports reverse power flow testing for solid-state meters used in net metering setups.
4. How easy is it to perform field inspections with a meter tester?
Weighing only 5.3 lb., the MT-1/NT4 can be set to test in one step (Preset mode), making it ideal for routine field inspections.
5. Can testers handle multiple phases at once?
When used with a commercial 12S meter, the MT-1/NT4 can test two phases either simultaneously or separately, providing flexibility for different field scenarios.
6. Why is a socket-style meter tester useful for routine inspections?
A socket-style tester like the MT-1/NT4 eliminates the need for wiring connections, speeding up testing and simplifying meter inspection workflows.
