MT-1/NT3

Portable 3-Phase Watthour Meter Tester

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.

Watch demo

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