Probewell ATK-3 Manuel utilisateur
ACCURACY TEST KIT
USER GUIDE FOR ATK-3 & ATK-4
Version 3.0 – February 2023
BEFORE PUTTING THIS PRODUCT INTO
SERVICE,
IT IS ESSENTIAL THAT THIS
INSTRUCTION BOOK BE
READ THOROUGHLY.
ACCURACY TEST KIT USER GUIDE FOR ATK-3 & ATK-4
2
© Copyright 2020 by Probewell Lab Inc. Printed in Canada.
All rights reserved, including those to reproduce this manual or parts thereof, in any form without the
express wrien permission of Probewell Lab Inc.
3
Limited Warranty
Your Accuracy Test Kit (ATK-3 or ATK-4) comes with a two-year hardware warranty.
Probewell Lab Inc. (Probewell) warrants this product against defects in material and work-
manship for a period of two (2) years from the date of purchase from Probewell or an
authorized Probewell agent. This warranty applies only to the original purchaser of this
product and is not transferable.
This warranty does not cover any damage caused by negligence, non- authorized modi-
caons, or parts installed without prior wrien permission from Probewell.
This warranty does not apply if the product has been damaged by accident, abuse, mis-
use, or misapplicaon, nor as a result of service to the product by anyone other than
Probewell.
PROBEWELL IS NOT RESPONSIBLE FOR ANY LOST PROFITS, LOST SAVINGS OR
OTHER INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE,
OR INABILITY TO USE, OF THIS PRODUCT. THIS INCLUDES DAMAGE TO PROPERTY
AND DAMAGES FOR PERSONAL INJURY. THIS WARRANTY IS IN LIEU OF ALL OTH-
ER WARRANTIES INCLUDING IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE.
Disclaimer
Probewell Lab Inc. (Probewell) reserves the right to make changes to this document and
the products which it describes without noce. Probewell shall not be liable for technical
or editorial errors or omissions made herein; nor for incidental or consequenal damages
resulng from the furnishing, performance, or use of this material.
Features and specicaons are subject to change without noce.
ACCURACY TEST KIT USER GUIDE FOR ATK-3 & ATK-4
4
Table of Contents
Limited Warranty
........................................................................................................... 3
Disclaimer
......................................................................................................................... 3
Table of Contents
.......................................................................................................... 4
Chapter 1
Descripon
................................................................................................................................ 5
Equipment Required
..................................................................................................... 5
How it works
................................................................................................................... 6
Chapter 2
Connecon
................................................................................................................................ 7
Chapter 3
NT Series Tester
.................................................................................................................... 11
Accuracy Tesng Procedure (NT Series)
........................................................... 11
User Calibraon (NT Series)
................................................................................... 13
Troubleshoong (NT Series)
................................................................................... 15
Chapter 4
Accuracy Tesng Procedure (WT Series)
................................................................... 17
Pairing the device
....................................................................................................... 17
Accuracy Test Sengs ....................................................................................18
Main Accuracy Test Screen ............................................................................19
While Performing the Accuracy Test ...........................................................20
Accuracy Test Completer ...............................................................................21
User Calibraon (WT Series)
................................................................................. 22
Troubleshoong (WT Series)
................................................................................. 24
Chapter 5
Accuracy Report (WT Series)
.......................................................................................... 27
Appendix A
Addional Connecon Diagrams
.................................................................................. 30
CHAPTER 1: DESCRIPTION
5
Chapter 1
Description
The accuracy of MT-1/NT3, MT-1/NT4, MT-1/NT5, MT-1/NT9, MT-1/WT1 and
MT-1/WT3 can be checked against a NIST traceable standard using the following test
procedure. The accuracy is tested on 6 dierent current test points: 1.5, 3.0, 5.0, 15.0,
30.0 and 50.0A at both 1 (0°) and 0.5 lag (60°) power factors in Wh. Addionally the NT9
and WT3 does VARh at 30° and 90°. The accuracy test can be done using a stabilized and
isolated AC power source at either 120 or 240 volts.
Equipment Required
• A primary or secondary electronic wahour standard traceable to NIST, with an
output of 10µWh or 20µWh per pulse, from the BNC port.. The standard must have
at least one isolated current input port of a minimum capacity of 50 A with autoran-
ging capability. We recommend a standard with an accuracy of 0.02% or beer.
• The Probewell Accuracy Test Kit (single-phase or three-phase). The Kit includes the
following items:
• An Accuracy Test Interface (PW-8967), a BNC coaxial cable and a Probewell
extension cable RJ12 type connecon.
• An Accuracy Test Jack.
•
Three-phase (ATK-3) for MT-1/NT3, MT-1/NT9 and MT-1/WT3
•
Single-phase (ATK-4) for MT-1/NT4, MT-1/NT5 and MT-1/WT1
•
MT-1/NT3 and MT-1/NT7 (discounnued models)
• A laboratory stabilized and isolated AC power source with fundamental waveform
selectable at 120V or 240V ±5%, 58~62 Hz, rated at least 150VA.
A laboratory stabilized, and isolated AC power source is preferred rather
than a small isolated line transformer or autotransformer. Such small
transformers could generate severe harmonics and voltage uctuaons
which could cause small addional measuring errors. Always fuse the
power leads going to the rear tabs 1 & 3 of the unit with a quick acon 1 A
fuse. The power leads and fuses are not provided with the Accuracy Test
Kit (ATK)..
ACCURACY TEST KIT USER GUIDE FOR ATK-3 & ATK-4
6
How it works
The previously described setup is used to check the accuracy of the internal Wh standard
of the unit under test against a NIST traceable Wh standard. The unit is tested at six
(6) current test points: 1.5, 3.0, 5.0, 15.0, 30.0 and 50.0 A at both 1 and 0.5 lag power
factors.
The meter that is normally inserted in the front of the unit is replaced by a NIST traceable
standard. The standard is hooked up through a test jack in the front of the unit. A pair
of #4 AWG cables connect the test jack to the input current terminals of the standard.
Also, a pair of #18 AWG test leads are connected to the standard’s voltage terminals.
The current and voltage are both generated by the unit. The current produced by the
unit is the same current as the one circulang through the input current terminals of the
standard.
The internal wiring of the test jack connects the unit’s current elements in series to a
single element of the standard.
T
he standard sends a set number of pulses to the Accuracy Test Interface
through the
coaxial cable. These pulses correspond to very precise units of energy. These pulses can
be either 10µWh (high pulse rate) or 20µWh (medium pulse rate) depending on the model
of the standard used. The Probewell Connect 2.0 Accuracy Test Interface accepts either.
It processes these pulses from the standard and then sends them to the unit’s embedded
processor. The Accuracy Test Interface is made up of digital circuitry only. It acts as a
programmable digital divider which is not sensive to heat and will not dri in me.
During the test, the embedded controller of the unit registers the energy measured by
the standard (cumulated pulses converted to Wh) and the energy measured by the unit
being tested (internal Wh standard). These two measurements are independent of one
another. When they converge toward the same value, the unit’s internal Wh standard
is considered well calibrated and the % error is very close to zero. A summary is shown
when the test is completed.
CHAPTER 2: CONNECTIION
7
Chapter 2
Connection
Cauon:
This procedure involves high voltage. Use extreme
cauon in working with and making connecons.
Always wear appropriate protecve equipment.
1. With insulated alligator clips, connect the power leads from the AC power source
to tabs 1 and 4 located at the back of the Probewell unit. Always leave the Form
Selector switch in the 2S posion (lemost).
Three-phaseUnitPowerConnecon Single-phaseUnitPowerConnecon
Fig. 1:
MT-1/NT3*, MT-1/NT9 and MT-1/WT3
Fig. 2:
MT-1/NT4, MT-1/NT5 and MT-1/WT1
*MT-1/NT3 and MT-1/NT7 (discounnued models)
ACCURACY TEST KIT USER GUIDE FOR ATK-3 & ATK-4
8
2. Install the test jack on front of the unit in test. Connect the current and voltage
wires between the test jack and the standard while respecng the polarity (see Fig.
3). Refer to the Standard’s manufacturer for details on how to connect the Aux.
Power ports.
Fig. 3 – Test jack (ATK-3 or ATK-4) to Standard Connecon
To remove the test jack, power o the unit and insert a large at screwdriver
in the notch located on the boom side of the rim to pry it out of the unit
in test.
CHAPTER 3: NT SERIES TESTER
9
3. Connect the coaxial cable from the Input (pulses) BNC connector on the Accuracy
Test Interface to the output pulses BNC connector of the Standard. Then, connect
the unit in test’s I/O port to the Accuracy Test Interface (port 1, le) with the
provided RJ12 extension cable. For NT series, connect the handheld remote to the
other port of the Accuracy Test Interface (port 2, right) using a RJ12 extension cable.
For WT series, port 2 of the Accuracy Test Interface is unused.
The Accuracy Test Interface is powered by the test socket itself. A red LED
indicates the presence of power.
NT Series WT Series
Input (pulses)
Power Led
To the
Test
Socket
To the
Handheld
Remote
Input (pulses)
Power Led
To the
Test
Socket
Fig. 4 - Accuracy Test Interface
ACCURACY TEST KIT USER GUIDE FOR ATK-3 & ATK-4
10
Ce manuel convient aux modèles suivants
1
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