MT-1/NT3

Portable 3-Phase Watthour Meter Tester

All good things must come to an end!

2021/06/30 08:50:28

After careful consideration, we have decided to discontinue the manufacture and sale of the MT-1/NT3 meter tester by June 30^th, 2021, with a last time buy on July 31^st, 2021.

The standard warranty terms will be honored for all units shipped to date. Active orders prior to the announced date will be honored according to the terms of that order, with regard to product availability, warranty, or support terms.

If you own an older-generation Probewell product, you are automatically eligible for our trade-in program, meant to ensure that our customers get all the benefits of our latest innovation by transitioning to an up-to-date version of the solution.

Trade in your older-generation Probewell tester and get an up to $1,000 discount on the purchase of any of our latest models.

Make the leap to the next generation now!

The MT-1/NT3 is an ideal tool for field-testing and periodic sampling of self-contained meters. No setup wiring is needed. A complete test is done within a few minutes!

The MT-1/NT3 can be set to test all 3 phases simultaneously in one step or set to do a full test consisting of the 3 phases simultaneously followed by each element separately.

Spec Sheet

Self-Contained Meters

An ideal testing solution for self-contained meters, the MT-1/NT3 also has reverse flow testing capability for net metering installations.

Uncompromised accuracy

Three built-in 50A current synthesizers (phantom load) simulate active and reactive load.

Its built-in single-phase Wh/VARh standard will offer you a typical NIST traceable accuracy of ±0.02%.

Easy Setup

Fast setup with no wiring and a dead-front design means your operation is quicker and safer.

Setting-up your test has never been easier.

Technical Specifications

Compatible Meters
Single-Phase	1S, 2S, 12S, 14S, 15S and 16S
Class	100, 200, 320
Test Socket
Input Voltage	100 – 600VAC
Line Frequency	58 – 62Hz
Power Consumption	75VA (maximum)
Circuit Breakers	3 x 1A (press-to-reset mechanism)
Current Synthesizers
Adjustable Current	1 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	8.3” x 3.9” x 1″
Carrying Bag	11″ x 11″ x 8″
Weight
Test Socket	5.7 lb
Remote Control	0.6 lb
Carrying Bag	8.7 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