Vitrek XiTRON XT560 User manual

USER GUIDE
XT560
Digital
Milliohmmeter

2 XT560 Digital Milliohmmeter User Guide

Warranty 3
Warranty
The Vitrek instrument is warranted against defects in material and workmanship
for a period of one year after the date of purchase. Vitrek agrees to repair or
replace any assembly or component (except batteries) found to be defective,
under normal use, during the warranty period. Vitrek's obligation under this
warranty is limited solely to repairing any such instrument, which in Vitrek's
sole opinion proves to be defective within the scope of the warranty, when
returned to the factory or to an authorized service center. Transportation to the
factory or service center is to be prepaid by the purchaser. Shipment should not
be made without prior authorization by Vitrek.
The warranty does not apply to any products repaired or altered by persons not
authorized by Vitrek, or not in accordance with instructions provided by Vitrek.
If the instrument is defective as a result of misuse, improper repair, or abnormal
conditions or operations, repairs will be billed at cost.
Vitrek assumes no responsibility for its product being used in a hazardous or
dangerous manner, either alone or in conjunction with other equipment. Special
disclaimers apply to this instrument. Vitrek assumes no liability for secondary
charges or consequential damages, and, in any event, Vitrek's liability for breach
of warranty under any contract or otherwise, shall not exceed the original
purchase price of the specific instrument shipped and against which a claim is
made.
Any recommendations made by Vitrek or its Representatives, for use of its
products are based upon tests believed to be reliable, but Vitrek makes no
warranties of the results to be obtained. This warranty is in lieu of all other
warranties, expressed or implied, and no representative or person is authorized
to represent or assume for Vitrek any liability in connection with the sale of
Vitrek products other than set forth herein.
Instrument Serial Number: __________________________________

4 XT560 Digital Milliohmmeter User Guide
Document Part Number: MO-560-M Revision 2.0
Print date: April 7, 2009
Copyright
Copyright 2006 Vitrek All rights reserved.
All rights reserved. No part of this publication may be reproduced,
transmitted, transcribed, stored in a retrieval system, or translated into any
language in any form without prior written consent from Vitrek. This
product manual is copyrighted and contains proprietary information, which is
subject to change without notice. The product's displays and manual text may
be used or copied only in accordance with the terms of the license agreement.
is a trademark of Vitrek. All other trademarks or registered
trademarks are acknowledged as the exclusive property of their respective
owners.
In the interest of continued product development, Vitrek reserves the right to
make changes in this guide and the product it describes at any time, without
notice or obligation.
Manufacturers of Engineering & Production Test Equipment
12169 Kirkham Road
Poway, California 92064 USA
Telephone: [phone]
E-mail: [email protected]

Contents 5
Contents
INTRODUCTION ____________________________________________________ 8
Scope _________________________________________________________ 8
Features _______________________________________________________ 8
FUNCTIONAL DESCRIPTION_________________________________________ 10
Front Panel ____________________________________________________ 10
Front Panel Display __________________________________________ 11
Rear Panel ____________________________________________________ 12
Dimensions and Stand Operation ___________________________________ 13
Case Dimensions____________________________________________ 13
Stand Operation_____________________________________________ 13
Using the Meter_________________________________________________ 14
Range Selection_____________________________________________ 14
HOLD Mode________________________________________________ 15
Four-Wire Measurement ______________________________________ 15
CALIBRATION _____________________________________________________ 16
LOCAL AND REMOTE OPERATION____________________________________ 19
RS-232 / RS-485 Communication Interface ___________________________ 19
XT560 Communication________________________________________ 19
Pin-out of Communication Port _________________________________ 20
Programming Examples_______________________________________ 20
XT560 RS-232 Communication Commands _______________________ 21
APPENDIX A - PHYSICAL SPECIFICATIONS ____________________________ 23
General _______________________________________________________ 23
Environment________________________________________________ 23
Altitude Equivalent ___________________________________________ 23

6 Contents
Dimensions ________________________________________________ 23
APPENDIX B - MEASUREMENT SPECIFICATIONS _______________________ 24
Specification ___________________________________________________ 24

Contents 7
Figures
Figure 1. Front Panel_____________________________________________ 10
Figure 2. Rear Panel _____________________________________________ 12
Figure 3. Meter Dimensions _______________________________________ 13
Figure 4. Stand Retracted _________________________________________ 14
Figure 5. Standing Position ________________________________________ 14
Figure 6. Stand as a Handle _______________________________________ 14
Figure 7. Changing Positions ______________________________________ 14
Figure 8. Four-wire Measurement Diagram____________________________ 15
Figure 9. Calibration with Resistor Standard___________________________ 18
Figure 10. RS-232 Connector Pin-out________________________________ 20

Introduction 8
Introduction
The purpose of this user guide is to describe the use and capabilities of the
XT560 Digital Milliohmmeter.
Scope The XT560 Digital Milliohmmeter is a dedicated, fully automatic instrument
that selects the optimal test current, from 100nA to 100mA DC to accurately
measure resistances from 10μΩ to 33MΩ. The XT560 will auto range
between 9 ranges, or can be manually set to a fixed range. The XT560
includes a set of Kelvin test clip leads for making four-terminal
measurements.
The XT560 is ideal for measuring wiring or cable resistances, windings of
motors or generators, lamp filaments, cable splices, wire-to-terminal
resistances, heating elements, contact resistance of breakers or switches,
connector quality/resistance, fuse resistances, transformers, and grounding
connections.
Features
The XT560 Digital Milliohmmeter’s features include the following—
Maximum Display of 33000
Power Supply 90VAC to 260VAC, 50/60Hz
Wide Measurement Range: From 10μΩ resolution to 30MΩ full
scale

Introduction 9
High Accuracy ±0.05%
Auto/Manual Function
RS-232 Interface Standard
Measurement Speed 10 samples/sec.
HOLD, REL Function

Functional Description 10
Functional Description
This chapter describes the operation and interfaces of the XT560 Digital
Milliohmmeter.
Front Panel
The front panel of the XT560 is shown in Figure 1 below.
FRONT PANEL DIAGRAM
Figure 1. Front Panel
XT560 Digital Milliohmmeter
SENSE
SOURCE
HI
LO

Functional Description 11
Front Panel Display
Refer to Figure 1.
1. Power push button
2. Sense LO Terminal (voltage input -)
3. Source LO Terminal (current output -)
4. Sense HI Terminal (voltage input +)
5. Source HI Terminal (current output +)
6. G Terminals (ground)
7. The display of the 5601 digital ohm meter is a 6 digit,
0.56 ”, numerical LED display.
The following characters indicate the unit of the value
displayed.
M
Mega
1×106
ADDR
Address
K
Kilo
1×103
REL
Relative
m
Milli
1×10-3
CAL
Calibrate
Ω
ohm
Resistance
AUTO
Auto range
REM
Remote
BAUD
Baud rate
8. Function Keys
▲key: Up range key
▼ key: Down range key
AUTO key: Auto range key
HOLD key: Touch hold key
TRIG key: Trigger a data key
REL key: Relative mode key
9. CAL Button: To enter into the calibration mode.

12 Functional Description
!
Rear Panel
Refer to Figure 2.
1. RS-232 Connector
2. Power-Line Cord Connector, AC, 90~264V, 50/60Hz
3. Fuse for power, 250V/1A
4. Fuse for input, 250V/0.5A
Figure 2. Rear Panel
Replacement fuses must be the same size as the original.
1
2
3
4

Functional Description 13
Dimensions and Stand Operation
Case Dimensions
Units: mm
Figure 3. Meter Dimensions
Stand Operation
There are 3 positions for the XT560 stand. Figures 4, 5, and 6 illustrate
the XT560 with the stand fully retracted horizontally, as a stand, and as
a handle. Figure 7 illustrates the method of changing the position of
XiTRON Digital Milliohmmeter

14 Functional Description
the stand. Pull the stand with both hands from the left and right sides,
turn it to the desired position, then release.
Figure 4. Stand Retracted
Figure 5. Standing Position
Figure 6. Stand as a Handle
Figure 7. Changing Positions
Using the Meter
Range Selection
The XT560 digital milliohmmeter has two ranging modes, Manual and
Auto. The measurement range can be selected using either auto range
by pressing the Auto button, or Manual range by pressing the ▲ or ▼
buttons.
In auto range, the ohmmeter changes to a higher range when the
reading is over full scale (30000 counts), and changes to a lower range
XiTRON Digital Milliohmmeter

Functional Description 15
when the reading is below 9% of full scale (2700 counts). The auto
range function will range from the highest range, 30Mohms, to the
lowest range, 300mohms.
The XT560 measures from 10μohms to 30Mohms in 9 ranges. The
ranges are: 300mohms, 3ohms, 30ohms, 300ohms, 3kohms, 30kohms,
300kohms, 3Mohms, and 30Mohms .
HOLD Mode
When the XT560 is operating in the display hold mode, pressing the
HOLD key allows the user to take a measurement and hold that
measurement value on the display. Press the HOLD key again to
remove the hold function.
Four-Wire Measurement
The XT560 makes 4-wire resistance measurements as shown in Figure
8. The source HI and LO leads apply a known, internal current source
to the unknown resistance, the sense HI and LO leads measure the
voltage across the unknown resistance.
Figure 8. Four-wire Measurement Diagram

Calibration 16
CALIBRATION
To perform a calibration, proceed as follows:
1. Press the CAL enable button to enter the calibration mode.
2. Press the UP-DOWN button to select the range to be calibrated.
3. Short the probes together and wait a minimum period of time as
specified in Reference Table 1. Then press the SHIFT and
TRIG keys at the same time.
4. Connect the Resistor Standard to the meter in a 4-wire
configuration, refer to Figure 9. Wait for a period of time as
specified in Reference Table 1, for the XT560 to stabilize. Then
press the SHIFT and HOLD keys at the same time.
5. Repeat this procedure adjusting the XT560 milliohmmeter for
each range: 300mΩ range, 3Ω range, … and finally the 30MΩ
range.

Calibration 17
Reference Table 1
RANGE
RESISTOR
STANDARD
VALUE
WAITING TIME
BEFORE
PRESSING
KEYS
PRESS KEY
300mΩ
0Ω
5 sec …
SHIFT+TRIG
SHIFT+HOLD
100mΩ
3Ω
0Ω
3 sec …
SHIFT+TRIG
SHIFT+HOLD
1Ω
30Ω
0Ω
3 sec …
SHIFT+TRIG
SHIFT+HOLD
10Ω
300Ω
0Ω
3 sec …
SHIFT+TRIG
SHIFT+HOLD
100Ω
3KΩ
0Ω
3 sec …
SHIFT+TRIG
SHIFT+HOLD
1kΩ
30KΩ
0Ω
3 sec …
SHIFT+TRIG
SHIFT+HOLD
10kΩ
300KΩ
0Ω
3 sec …
SHIFT+TRIG
SHIFT+HOLD
100kΩ
3MΩ
0Ω
5 sec …
SHIFT+TRIG
SHIFT+HOLD
1MΩ
30MΩ
0Ω
10 sec …
SHIFT+TRIG
SHIFT+HOLD
10MΩ
Note: DO NOT enter the adjustment mode if the Resistor Standard and
a certified technician are not available.

18 Calibration
Figure 9. Calibration with Resistor Standard

Local and Remote Operation 19
LOCAL AND REMOTE OPERATION
When the meter is operated from a host computer it is said to be
operated “remotely”. When the meter is operated from its front panel, it
is said to be operated “locally”. Some operations, such as setting the
communication parameters for the RS-232 interface, can only be
performed from the front panel .
To change the baud rate, perform the following. Press and hold the
SHIFT key, then press the REL to display the present communication
rate. At this point, while holding the SHIFT key, additional presses of
the REL key will select new baud rates.
RS-232 / RS-485 Communication Interface
XT560 Communication
Baud rates supported: 300, 2400, 9600
Parity: None
Number of data bits: 8 bits
Number of stop bits: 1 bit
Address: 0 to 30
Echo: On/off

20 Local and Remote Operation
Pin-out of Communication Port
Figure 10. RS-232 Connector Pin-out
Programming Examples
Visual Basic example:
Private Sub Command1_Click()
'send command to XT560
MSComm1.Output = "VAL ?" & Chr(13)
'delay 1 second to read XT560
Timer1.Enabled = True
End Sub
Private Sub Form_Load()
'set serial port
MSComm1.InputMode = comInputModeText
MSComm1.Settings = "9600,n,8,1"
MSComm1.CommPort = 1
MSComm1.PortOpen = True
'set timer to delay 1 second
Timer1.Enabled = False
Timer1.Interval = 1000
End Sub