Vanguard Instruments EZCT User manual

EZCT and EZCT-10
DIGITAL CURRENT-TRANSFORMER TESTERS
USER’S MANUAL
Vanguard Instruments Company, Inc.
1520 S. Hellman Ave.
Ontario, California 91761, USA
TEL: [phone]
FAX: [phone]
February 2010
Revision 4
http://www.51082245.com

EZCT/EZCT-10 USER’S MANUAL REV 4
i
SAFETY SUMMARY
This manual applies to the EZCT and EZCT-10 Current Transformer Testers. The operating
procedures are virtually the same for both models, and any differences in operation are clearly
described in the step-by-step procedures.
FOLLOW EXACT OPERATING PROCEDURES
Any deviation from the procedures described in this User’s Manual may create one or more
safety hazards, may damage the EZCT/EZCT-10, or cause errors in the test results. Vanguard
Instruments Company, Inc. assumes no liability for unsafe or improper use of the EZCT/EZCT-10.
All safety precautions provided in this manual must be observed during all phases of testing
including test preparation, test lead connection, actual testing, and test lead disconnection.
SAFETY WARNINGS AND CAUTIONS
The EZCT/EZCT-10 can produce a voltage up to 1,200 Vac that can cause severe injury and/or
equipment damage. Due to this reason, the EZCT/EZCT-10 shall be used only by trained
operators.
The EZCT/EZCT-10’s X output terminals are rated to 1,200 Vac working voltage. Any voltage
above 1,200 Vac will damage the input circuitry.
All devices under test shall be off-line and fully isolated. Never attempt to test any current
transformer still connected to a circuit. All current transformer terminals shall be isolated
before conducting any test with the EZCT/EZCT-10.
Always ground the EZCT/EZCT-10 to a substation ground before connecting the test cables to a
transformer.
DO NOT MODIFY TEST EQUIPMENT
To avoid the risk of introducing additional or unknown hazards, do not install substitute parts or
perform any unauthorized modification to any EZCT/EZCT-10 test unit. To ensure that all
designed safety features are maintained, it is highly recommended that repairs be performed
only by Vanguard Instruments Company factory personnel or by an authorized repair service
provider. Unauthorized modifications can cause safety hazards and will void the manufacturer’s
warranty.
WARNING
Do not remove test leads during a test. Failure to heed this warning can result in electrical
shock to personnel and damage to the equipment.
http://www.51082245.com

REV 4 EZCT/EZCT-10 USER’S MANUAL
ii
TABLE OF CONTENTS
CONVENTIONS USED IN THIS DOCUMENT ..................................................................................... 1
1.0 INTRODUCTION.................................................................................................................... 2
1.1 General Description and Features ................................................................................... 2
1.2 Furnished Accessories...................................................................................................... 3
1.3 Technical Specifications ................................................................................................... 4
1.3.1. EZCT Technical Specifications................................................................................... 4
1.3.2. EZCT-10 Technical Specifications ............................................................................. 5
1.4 Controls and Indicators.................................................................................................... 6
2.0 PRE-TEST SETUP ................................................................................................................... 8
2.1 Operating Voltages .......................................................................................................... 8
2.2 LCD Screen Contrast Control............................................................................................ 8
2.3 Printer Paper Control....................................................................................................... 8
2.4 Printer Paper.................................................................................................................... 8
3.0 OPERATING PROCEDURES ................................................................................................. 10
3.1 EZCT Cable Connections................................................................................................. 10
3.2 Performing Tests............................................................................................................ 13
3.2.1. Entering Test Record Header Information ............................................................. 13
3.2.2. Performing an Excitation and Ratio Test................................................................ 16
3.2.3. Performing a Turns Ratio Only Test ....................................................................... 23
3.3 Working With Test Records ........................................................................................... 27
3.3.1. Printing a Test Record Directory ............................................................................ 27
3.3.2. Restoring and Printing a Test Record From Flash EEPROM ................................... 29
3.3.3. Printing a Restored Test Record............................................................................. 32
3.3.4. Erasing Test Records From the Flash EEPROM ...................................................... 33
4.0 CHANGING SETUP PARAMETERS ....................................................................................... 35
4.1 Setting the Knee Point Marker ...................................................................................... 35
4.2 Selecting the Buried CT in Transformer Delta Option ................................................... 37
4.2.1. Enabling the Buried CT in Transformer Delta Option............................................. 37
4.2.2. Disabling the Buried CT in Transformer Delta Option............................................ 38
4.3 Setting the Clock ............................................................................................................ 42
4.4 Setting the Option to Print Impedance (Z) in the Tabulated Results ............................ 43
5.0 DIAGNOSTICS, VERIFICATION, AND TROUBLESHOOTING ................................................. 46
5.1 Performing a Diagnostics Test ....................................................................................... 46
5.2 Verifying the EZCT’s VxSense Circuit Using an External Meter ..................................... 48
5.3 Verifying the EZCT’s IxSense Circuit Using an External Meter ...................................... 49
5.4 Quickly Verifying the EZCT’s Turns Ratio Circuit............................................................ 50
5.5 Troubleshooting Guide .................................................................................................. 51
http://www.51082245.com

EZCT/EZCT-10 USER’S MANUAL REV 4
iii
LIST OF TABLES
Table 1. EZCT Technical Specifications ........................................................................................... 4
Table 2. EZCT-10 Technical Specifications ...................................................................................... 5
Table 3. Functional Descriptions of EZCT/EZCT-10 Controls and Indicators .................................. 7
Table 4. Descriptions of Tabulated Test Results Elements ........................................................... 22
LIST OF FIGURES
Figure 1. EZCT/EZCT-10 Controls and Indicators ............................................................................ 6
Figure 2. Typical EZCT Cable Connection ...................................................................................... 10
Figure 3. Connection to CT’s on Y Transformer ............................................................................ 11
Figure 4. Connection to CT's on a Delta Transformer................................................................... 11
Figure 5. Typical EZCT Connection to Multiple CT’s ..................................................................... 12
Figure 6. Typical EZCT Tabulated Report Printout ........................................................................ 21
Figure 7. Typical EZCT Excitation Graph........................................................................................ 22
Figure 8. Typical Turns Ratio Only Test Report Printout .............................................................. 26
Figure 9. Sample Test Record Directory Printout ......................................................................... 28
Figure 10. Typical Abbreviated Test Record Printout ................................................................... 31
Figure 11. Graphic Report Showing Knee Point Marker............................................................... 36
Figure 12. Buried CT in a Delta Transformer Illustration 1 ........................................................... 40
Figure 13. Buried CT in a Delta Transformer Illustration 2 ........................................................... 40
Figure 14. Tabulated Report Printout with Impedance Values .................................................... 45
Figure 15. EZCT VxVerification Test Connections......................................................................... 48
Figure 16. EZCT IxVerification Test Connections .......................................................................... 49
Figure 17. EZCT Turns Ratio Verification Test Connections.......................................................... 50
http://www.51082245.com

REV 4 EZCT/EZCT-10 USER’S MANUAL
1
CONVENTIONS USED IN THIS DOCUMENT
This document uses the following conventions:
•A key, switch, or knob on the EZCT/EZCT-10 is indicated as [KEY], [SWITCH], [KNOB].
•Menu options are referenced as (MENU OPTION).
•Both the EZCT and the EZCT-10 are simply referred to as “EZCT” in this manual. The exact
model number is used only in cases where differences between the units are discussed.
•Screen and menu names are referenced as “SCREEN/MENU NAME”.
•The terms “test record” and “test shot” are used interchangeably.
•EZCT/EZCT-10 LCD screen output is shown as:
•Warning messages are indicated as:
WARNING
Warning message
•Important notes are indicated as:
NOTE
Note details
1. OPTION 1
2. OPTION 2
3. OPTION 3
4. OPTION 4
http://www.51082245.com

EZCT/EZCT-10 USER’S MANUAL REV 4
2
1.0 INTRODUCTION
1.1 General Description and Features
The EZCT is a microprocessor-based, current-transformer test set. This rugged and portable test
set can perform the current transformer (CT) excitation, CT current-ratio, and winding polarity
tests. Current transformers can be tested in their field-mounted configuration, eliminating the
need to remove bushings or current transformers from the host equipment. The EZCT is
capable of outputting 50 Vac at 2A and 200 Vac at 2A.
The EZCT-10 has all the features of the EZCT, but uses a heavy-duty transformer to perform the
CT excitation test. It is capable of outputting 50 Vac at 10A and 200 Vac at 10A.
CT Excitation Test
The CT excitation test is performed using the ANSI/IEEE C57.13.1, IEC 60044-1 test method. The
EZCT applies an AC variable test voltage (up to 1,200 Vac) to the CT’s secondary windings. The
EZCT records and displays the test voltage and excitation current applied to the current
transformer during the excitation test. Once tests are completed, up to 10 excitation curves and
knee-point voltages of the tests can be plotted on the built-in thermal printer. IEEE-30, IEEE-45,
ANSI/IEC 60044-1 (10/50) knee point voltages are also calculated and printed on the test
report.
CT Ratio and Polarity Tests
The EZCT determines the CT current-ratio using the ANSI/IEEE C57.12.90 measurement
method. A test voltage is applied on the CT’s X terminals and the induced voltage is measured
across the CT’s H1 and H2 terminals. The current-ratio is displayed on the screen and stored in
memory. The current-ratio measuring range is from 0.8 to 5,000. Winding polarity is displayed
as a “+” sign (in-phase) or “-” sign (out-of-phase) and is annotated with the phase angle in
degrees.
User Interface
The EZCT features a back-lit LCD screen (4 lines by 20 characters) that is viewable in both bright
sunlight and low-light levels. A rugged, alpha-numeric, membrane keypad is used to enter test
information and to control the unit’s functions. The test voltage range (50V at 2A, 200V at 2A,
1,200V at 1.5A) is selected with a switch on the control panel. A voltage control knob is used to
control the variable test voltage output.
Thermal Printer
A built-in 4.5-inch wide thermal printer can print the current transformer test report and plot
the excitation curves..
http://www.51082245.com

REV 4 EZCT/EZCT-10 USER’S MANUAL
3
Computer Interface
The EZCT can be used as a stand-alone unit or can be computer-controlled via the built-in RS-
232C or USB interfaces. Windows® XP/Vista-based Current Transformer Analysis software is
provided with each EZCT. This software can be used to retrieve test records from the EZCT and
can also be used to run CT tests from the PC. Tabulated test records can be exported in
Microsoft® Excel format.
1.2 Furnished Accessories
The EZCT comes furnished with the following:
•One Power Cord
•One Ground Cable
•One 20-foot X Cable Set
•One 35-foot H Cable Set
•One cable carrying duffel bag
http://www.51082245.com

EZCT/EZCT-10 USER’S MANUAL REV 4
4
1.3 Technical Specifications
1.3.1. EZCT Technical Specifications
Table 1. EZCT Technical Specifications
TYPE Portable current-transformer test set
PHYSICAL SPECIFICATIONS 16.8”W x 12.6”H x 12”D (42.7 cm x 32 cm x 26.9 cm); Weight: 55 lbs (25 Kg)
INPUT POWER 100 – 120 Vac or 200 – 240 Vac (factory pre-set), 50/60 Hz
MEASUREMENT METHOD ANSI/IEEE C57.12.90, IEC 60044-1 and ANSI/IEEE C57.13.1
OUTPUT
TEST OUTPUT VOLTAGES 0 – 50 Vac @ 2A max; 0 – 200 Vac @ 2A max; 0 – 1200 Vac @ 1.5A max (5 min on, 10 min off)
VOLTAGE READING RANGE 0 – 1,250 Vac; Accuracy: ±1.0% of reading, ±0.5 volt
CURRENT READING RANGE 0 – 10A; Accuracy: ±1.0% of reading, ±0.01A
CURRENT-RATIO RANGE 0.8 – 99: ±0.5%, 100 – 999: ±1.0%, 1,000 – 5,000: ±2%
PHASE ANGLE
MEASUREMENT 0 – 360 degrees; Accuracy: ±1.0 degree
DISPLAY Back-lit LCD Screen (20 characters by 4 lines); viewable in bright sunlight
and low-light levels
PRINTER Built-in 4.5-inch wide thermal printer
COMPUTER INTERFACES One RS-232C port, One USB port
PC SOFTWARE Windows
®
XP/Vista-based software is included with purchase price
INTERNAL
TEST RECORD STORAGE Stores 128 test records. Each test record may contain up to 10 excitation and ratio data sets
INTERNAL
TEST HEADER STORAGE Stores 10 test header records
SAFETY Designed to meet UL 61010A-1 and CAN/CSA C22.2 No. 1010.1-92
standards
ENVIRONMENT Operating: -10˚to 50˚C (15˚F to +122˚F); Storage: -30˚C to 70˚C (-22˚F to
+158˚F)
CABLES One 20-foot X cable set, One 35-foot H cable set, power cord, One ground
cable, One cable carrying duffel bag
OPTIONS Transportation case
WARRANTY One year on parts and labor
NOTE
The above specifications are valid at nominal operating voltage and at a
temperature of 25°C (77°F). Specifications may change without prior notice.
http://www.51082245.com

REV 4 EZCT/EZCT-10 USER’S MANUAL
5
1.3.2. EZCT-10 Technical Specifications
Table 2. EZCT-10 Technical Specifications
TYPE Portable current-transformer test set
PHYSICAL SPECIFICATIONS 16.8”W x 12.6”H x 12”D (42.7 cm x 32 cm x 26.9 cm); Weight: 55 lbs (25 Kg)
INPUT POWER 100 – 120 Vac or 200 - 240 Vac (factory pre-set), 50/60 Hz
MEASUREMENT METHOD ANSI/IEEE C57.12.90, IEC 60044-1 and ANSI/IEEE C57.13.1
OUTPUT
TEST OUTPUT VOLTAGES 0 – 50 Vac @ 10A max; 0 – 200 Vac @ 10A max; 0 – 1200 Vac @ 1.5A max (5 min on, 10 min off)
VOLTAGE READING RANGE 0 – 1,250 Vac; Accuracy: ±1.0% of reading, ±0.5 volt
CURRENT READING RANGE 0 – 10A; Accuracy: ±1.0% of reading, ±0.02A
CURRENT-RATIO RANGE 0.8 – 99: ±0.5%, 100 – 999: ±1.0%, 1,000 – 5,000: ±2%
PHASE ANGLE
MEASUREMENT 0 – 360 degrees; Accuracy: ±1.0 degree
DISPLAY Back-lit LCD Screen (20 characters by 4 lines); viewable in bright sunlight
and low-light levels
PRINTER Built-in 4.5-inch wide thermal printer
COMPUTER INTERFACES One RS-232C port, One USB port
PC SOFTWARE Windows
®
XP/Vista-based software is included with purchase price
INTERNAL
TEST RECORD STORAGE Stores 128 test records. Each test record may contain up to 10 excitation and ratio data sets
INTERNAL
TEST HEADER STORAGE Stores 10 test header records
SAFETY Designed to meet UL 61010A-1 and CAN/CSA C22.2 No. 1010.1-92
standards
ENVIRONMENT Operating: -10˚to 50˚C (15˚F to +122˚F); Storage: -30˚C to 70˚C (-22˚F to
+158˚F)
CABLES One 20-foot X cable set, One 35-foot H cable set, power cord, One ground
cable, One cable carrying duffel bag
OPTIONS Transportation case
WARRANTY One year on parts and labor
NOTE
The above specifications are valid at nominal operating voltage and at a
temperature of 25°C (77°F). Specifications may change without prior notice.
http://www.51082245.com

EZCT/EZCT-10 USER’S MANUAL REV 4
6
1.4 Controls and Indicators
The EZCT and EZCT-10 feature the same controls and indicators shown in Figure 1. A leader line
with an index number points to each control and indicator, which is cross-referenced to a
functional description in Table 3. The table describes the function of each item on the control
panel. The purpose of the controls and indicators may seem obvious, but users should become
familiar with them before using the EZCT. Accidental misuse of the controls will usually cause
no serious harm. Users should also be familiar with the safety summary found on the front page
of this User’s Manual.
Figure 1. EZCT/EZCT-10 Controls and Indicators
http://www.51082245.com

REV 4 EZCT/EZCT-10 USER’S MANUAL
7
Table 3. Functional Descriptions of EZCT/EZCT-10 Controls and Indicators
Item
Number Panel Markings Functional Description
1 X Current transformer excitation voltage connector.
2 H Current transformer primary input test cable connector.
3 50V, 200V, 1200V Test voltage selector switch.
4 HIGH VOLTAGE
PRESENT LED warning indicator that is illuminated when high voltage is present.
5 120 Vac, 12A
50-60Hz Power switch with built-in 20A circuit breaker.
6 None AC receptacle.
7 GROUND Ground stud.
8 USB PC USB PC interface connector.
9 RS-232C RS-232C PC interface connector.
10 VOLTAGE
CONTROL Test voltage control knob.
11 None Rugged, alpha-numeric membrane keypad.
12 None Back-lit LCD screen (20 characters by 4 lines), viewable in bright sunlight and
low-light levels.
13 None Built-in 4.5-inch wide thermal printer.
http://www.51082245.com

EZCT/EZCT-10 USER’S MANUAL REV 4
8
2.0 PRE-TEST SETUP
2.1 Operating Voltages
The EZCT’s operating voltage is preset at the factory for 100-120 Vac, 50/60 Hz or 200-240 Vac,
50/60 Hz.
2.2 LCD Screen Contrast Control
To increase the LCD screen contrast, press and hold the [PAPER ∧Contrast] key for two
seconds. Release the button when the desired contrast level has been reached.
To decrease the LCD screen contrast, press and hold the [PAPER ∨Contrast] key for two
seconds. Release the button when the desired contrast level has been reached.
2.3 Printer Paper Control
To advance the thermal printer paper, press and release the [PAPER ∧Contrast] key.
To retract the thermal printer paper, press and release the [PAPER ∨Contrast] key.
2.4 Printer Paper
The EZCT’s built-in thermal printer uses 4.5-inch wide thermal paper for printing test results. To
maintain the highest print quality and to avoid paper jams, the use of thermal paper supplied
by Vanguard Instruments Company is highly recommended. Additional paper can be ordered
from the following sources:
Vanguard Instruments Co, Inc.
1520 S. Hellman Avenue
Ontario, CA 91761
Tel: [phone]
Fax: [phone]
Part Number: VIC TP-4 paper
BG Instrument Co.
13607 E. Trent Avenue
Spokane, WA 99216
Tel: [phone]
Fax: [phone]
Part Number: VIC TP-4 paper
http://www.51082245.com

REV 4 EZCT/EZCT-10 USER’S MANUAL
9
2.5 Replacing the Thermal Printer Paper
The roll of thermal paper is housed inside a dispenser underneath the printer cover. To replace
the paper, follow the steps below:
•Unscrew the two large printer cover screws and remove the printer cover.
•Remove the leftover thermal paper roll from the paper holder.
•Unroll the new thermal paper roll.
•Feed the thermal paper into the slot between the paper pocket and the rubber roller.
The printer will automatically pull the paper under the thermal head.
•Place the paper roll into the paper holder.
•Lift the thermal head and align the thermal paper if necessary.
•Re-install the printer cover.
NOTE
Thermal paper has a chemical coating on one side of the paper. This side should be
facing the thermal print head. Incorrect paper loading may result in blank output on
the thermal paper.
The thermal paper will show a red stripe to indicate that the roll is about to run out
of paper.
2.6 Computer Interface Ports
The EZCT features one USB and one RS-232C PC interface port. A Windows-based “Current
Transformer Analysis” software application is supplied with the EZCT. For further information,
please see the software user’s manual.
http://www.51082245.com

EZCT/EZCT-10 USER’S MANUAL REV 4
10
3.0 OPERATING PROCEDURES
3.1 EZCT Cable Connections
Always connect the EZCT to the substation ground before connecting any test cables. The EZCT
is supplied with a 20-foot X test cable and a 35-foot H cable. Only the X cable connection is
required to run the transformer excitation test. The H and X cable connection is required to run
the transformer ratio test. A typical connection is shown in Figure 2.
Figure 2. Typical EZCT Cable Connection
http://www.51082245.com

REV 4 EZCT/EZCT-10 USER’S MANUAL
11
Figure 3. Connection to CT’s on Y Transformer
Figure 4. Connection to CT's on a Delta Transformer
http://www.51082245.com

EZCT/EZCT-10 USER’S MANUAL REV 4
12
Figure 5. Typical EZCT Connection to Multiple CT’s
http://www.51082245.com

REV 4 EZCT/EZCT-10 USER’S MANUAL
13
3.2 Performing Tests
3.2.1. Entering Test Record Header Information
You can enter the test record header information before performing tests. The record header
includes identifying information such as the company, station, circuit, model number, etc. Once
the header information has been entered, it will apply to all subsequent test records. To enter
the header information:
a. When the unit is turned on and the firmware has been loaded, you will be presented
with the “START-UP” menu as shown below:
Press the [2] key (SETUP).
b. The following screen will be displayed:
Press the [1] key (RECORD ID)
c. The following screen will be displayed:
Press the [1] key (ENTER SHOT ID)
d. The following screen will be displayed:
Type the company name using the alpha-numeric keypad.
When pressing a key, the corresponding number on the key will be displayed first.
Pressing the key again will display the first letter on the key. Pressing the key again will
display the second letter on the key. For example, to type the letter “A”, you must press
the [2] key twice. To erase the character at the cursor position, press the [CLEAR] key.
Press the [PAPER ∧Contrast] key to move to the next character. Press the [PAPER
COMPANY:
↑↓ TO POSITION
“ENTER” TO ACCEPT
1. ENTER SHOT ID
2. LOAD ID FROM MEM
3. SHOT ID DIRECTORY
1. RECORD ID
2. PRINT RECORD
3. RESTORE RECORD
4. NEXT PAGE
1. RUN TEST 08/25/09
2. SETUP 11:11:15
3. DIAGNOSTIC
http://www.51082245.com

EZCT/EZCT-10 USER’S MANUAL REV 4
14
∨Contrast] key to move to the previous character. Press the [ENTER] key when you
are done typing the company name.
e. The following screen will be displayed:
Type the station name using the alpha-numeric keypad and then press the [ENTER]
key.
f. The following screen will be displayed:
Type the circuit information using the alpha-numeric keypad and then press the
[ENTER] key.
g. The following screen will be displayed:
Type the manufacturer name using the alpha-numeric keypad and then press the
[ENTER] key.
h. The following screen will be displayed:
Type the model information using the alpha-numeric keypad and then press the
[ENTER] key.
MODEL:
↑↓ TO POSITION
“ENTER” TO ACCEPT
MANUFACTURER:
↑↓ TO POSITION
“ENTER” TO ACCEPT
CIRCUIT:
↑↓ TO POSITION
“ENTER” TO ACCEPT
STATION:
↑↓ TO POSITION
“ENTER” TO ACCEPT
http://www.51082245.com

REV 4 EZCT/EZCT-10 USER’S MANUAL
15
i. The following screen will be displayed:
Type the serial number using the alpha-numeric keypad and then press the [ENTER]
key.
j. The following screen will be displayed:
Enter any relevant comments using the alpha-numeric keypad and then press the
[ENTER] key.
k. The following screen will be displayed:
Type the operator’s name using the alpha-numeric keypad and then press the [ENTER]
key. All header information will be saved, and you will be returned to the “START-UP”
menu.
OPERATOR:
↑↓ TO POSITION
“ENTER” TO ACCEPT
COMMENTS:
↑↓ TO POSITION
“ENTER” TO ACCEPT
SERIAL NUMBER:
↑↓ TO POSITION
“ENTER” TO ACCEPT
http://www.51082245.com

EZCT/EZCT-10 USER’S MANUAL REV 4
16
3.2.2. Performing an Excitation and Ratio Test
When performing an excitation test, the EZCT applies an AC voltage to the CT secondary
winding. The user raises this AC voltage until the CT windings reach the saturation point. The
user then slowly lowers the test voltage back to zero volts. The voltage and current readings
will be recorded to plot the excitation curve. A typical excitation test contains a maximum of 32
data points. There may be less than 32 data points depending on how quickly the voltage is
lowered to zero or due to the CT excitation curve characteristics.
The EZCT also calculates the knee point voltages (using IEEE 45, IEEE 30, ANSI 10/50, IEC 60044-
1 10/50 standards) and prints them on the tabulated report.
The CT turns ratio is measured using the voltage method. An AC voltage is applied to the CT
secondary winding. The induced voltage on the CT primary winding is them measured. The CT
turns ratio is the voltage ratio measured between the secondary and the primary windings.
Follow the steps below to perform an excitation and ratio test:
WARNING
Do not change the voltage selector switch during a test. Failure to observe
this warning may damage the EZCT.
NOTES
•The red “HIGH VOLTAGE PRESENT” indicator will turn on when a test
voltage is present at the X terminals.
•A CT will typically reach saturation when the excitation current reaches
about 0.8A.
•IEC 60044-1 10/50 is equivalent to ANSI 10/50.
a. When the EZCT is turned on, it will first go through a start-up cycle and load the
firmware. Then the “START-UP” menu will be displayed as shown below:
Press the [1] key (RUN TEST) to start a test.
b. The following screen will be displayed:
Press the [1] key (EXCITATION & RATIO)
1. EXCITATION & RATIO
2. RATIO ONLY
1. RUN TEST 08/25/09
2. SETUP 11:11:25
3. DIAGNOSTIC
http://www.51082245.com