Omicron CMC 156 User manual
27
CMC 156
Reference Manual
Test Set CMC 156
2
Article Number VESD1002 - Version CMC156.AE.9
© OMICRON electronics. All rights reserved.
This manual is a publication of OMICRON electronics GmbH.
All rights including translation reserved. Reproduction of any kind, e.g., photocopying, microfilming,
optical character recognition and/or storage in electronic data processing systems, requires the explicit
consent of OMICRON electronics. Reprinting, wholly or in part, is not permitted.
The product information, specifications, and technical data embodied in this manual represent the
technical status at the time of writing and are subject to change without prior notice.
We have done our best to ensure that the information given in this manual is useful, accurate and
entirely reliable. However, OMICRON electronics does not assume responsibility for any inaccuracies
which may be present.
The user is responsible for every application that makes use of an OMICRON product.
OMICRON electronics translates this manual from the source language English into a number of other
languages. Any translation of this manual is done for local requirements, and in the event of a dispute
between the English and a non-English version, the English version of this manual shall govern.
Safety Instructions
3
Safety Instructions
ATTENTION: Before starting up the CMC 156, carefully read the following
safety instructions.
The system must not be put into operation without full knowledge of this
information!
The CMC 156 may only be operated by trained personnel on the
company premises!
Test Set CMC 156
4
For your safety
The generator outputs supply voltages up to 125 Vrms therefore:
• Operate the CMC 156 only with mains suppy with protective grounding!
• Connecting of one of the front-sided connectors to protective ground is not
permissible as this may cause dangerous contact voltages at all front panel
connectors. Grounding of a voltage output causes that also the sockets of
the analog inputs as well as the current outputs and N-connectors have
phase voltage.
• Use only measuring cables with 4 mm banana plugs and plastic jacketing
for connection to banana sockets; always insert plugs up to the stops.
Recommendation: use 4 mm safety banana plugs.
• Do not leave test leads exposed; always disconnect test leads at the
CMC 156 first!
• When connecting and disconnecting the test object make sure that all
generator outputs have been turned "OFF". Never disconnect the test
object when in a manual program section a switch in the software is "ON"
or a sweep is still under way (e.g. V, I, ϕ).
• All front panel sockets are to be considered as dangerous voltage contacts
with working voltages of up to 250Vrms. Therefore only cables certified to
the corresponding national standards institute may be used.
• If the generator section lamp lights, there is a dangerous contact voltage
(> 42 Vpk) at least at one of the three voltage outputs!
• Never insert conductive parts (screwdriver, etc.) into the sockets!
• Do not operate in a wet or humid environment (condensation).
• Do not operate if an explosive environment.
• External devices may only be connected to the SELV interfaces of the
CMC 156 (host-interface, Gen. out 7-12, ext. Interface) if they comply to the
SELV requirements according to EN60950.
Do not open the CMC 156 or remove any of its housing components
Voltages of up to 400 V will occur inside the unit! If the unit is opened,
warranty claims will become void.
If the mains fuse must be replaced (rear panel of the test set)
First disconnect the mains plug of the CMC test set!
Unscrew the plastic tile and change the fuse (T6.3AH 250V).
Table of Contents
5
Table of Contents
Safety Instructions...................................................................................................3
Table of Contents.....................................................................................................5
1Introduction .......................................................................................................7
2Start-Up..............................................................................................................9
2.1 System components ............................................................................................................9
2.2 System Start.........................................................................................................................9
3Design and Operation.....................................................................................11
3.1 Modules..............................................................................................................................12
3.1.1 Host Interface .......................................................................................................13
3.1.2 Processor..............................................................................................................13
3.1.3 D/A Converter + Reconstruction Filter .................................................................13
3.1.4 Measuring Module ................................................................................................14
3.1.5 Internal Current and Voltage Amplifiers ...............................................................15
3.1.6 Power Supply........................................................................................................16
3.2 Signal Generation ..............................................................................................................17
3.3 Accuracy ............................................................................................................................19
4Connectors and Interfaces .............................................................................20
4.1 Connectors on the Front Panel..........................................................................................20
4.1.1 Generator Combination Socket for VOLTAGE OUTPUT, CURRENT OUTPUT .22
4.1.2 Measurement Combination Socket for BINARY INPUT and ANALOG INPUT ...24
4.2 Connections on the Back Panel.........................................................................................27
4.2.1 Gen. out 7-12........................................................................................................27
4.2.2 ext. Interface .........................................................................................................29
5Technical Data.................................................................................................31
5.1 Mains Supply .....................................................................................................................31
5.2 Outputs...............................................................................................................................32
5.2.1 Current Outputs CURRENT OUTPUT 1-3 ...........................................................33
5.2.2 Voltage Outputs VOLTAGE OUTPUT 1-3............................................................35
5.2.3 Interface for an External Amplifier ‘Gen. out 7-12’ ...............................................36
5.2.4 Binary Outputs Relays..........................................................................................37
5.2.5 Binary Outputs Transistor.....................................................................................38
Test Set CMC 156
6
5.3 Inputs ................................................................................................................................ 39
5.3.1 Binary Inputs........................................................................................................ 39
5.3.2 Counter Inputs 100 kHz....................................................................................... 41
5.3.3 Measuring Inputs ................................................................................................. 42
5.4 Computer Interface ........................................................................................................... 43
5.5 Ambient Conditions........................................................................................................... 43
5.5.1 Climate................................................................................................................. 43
5.5.2 Shock and Vibration ............................................................................................ 44
5.5.3 Electromagnetic Compatibility (EMC).................................................................. 44
5.6 Safety ................................................................................................................................ 45
5.7 Mechanical Data ............................................................................................................... 45
6Technical Data EP Option .............................................................................. 47
6.1 Outputs (EP option) .......................................................................................................... 48
6.1.1 Current Outputs CURRENT OUTPUT 1-3 .......................................................... 49
6.1.2 Voltage Outputs VOLTAGE OUTPUT 1-3........................................................... 53
6.1.3 Output Power with EP option............................................................................... 55
7Appendix ......................................................................................................... 57
7.1 Optional Devices............................................................................................................... 57
7.1.1 Current Amplifier CMA 56.................................................................................... 57
7.1.2 Current Amplifier CMA 156.................................................................................. 58
7.1.3 Voltage and Current Amplifier CMS 156 ............................................................. 60
7.1.4 CMLIB B - Optional connection for meter testing ................................................ 62
7.2 Ordering Notes.................................................................................................................. 64
8Contact Information / Technical Support...................................................... 69
Index ....................................................................................................................... 71
Introduction
7
1 Introduction
The CMC 156 test system consists of the components CMC 156 test set, a
computer and the CMC user software. External amplifiers and optional devices
can also be controlled optionally.
Due to its wide range of optional settings, the CMC 156 test set completely
eliminates the need for operating elements on the front panel - every function
is controlled by the software on the COMPUTER. This means the module-
structured application software as well as the configuration of the test system.
The CMC software is described in the CMC software user's manual.
This description exclusively refers to the hardware of the CMC 156 test set.
Test Set CMC 156
8
Start-Up
9
2 Start-Up
2.1 System components
Before start-up, please verify that all system components are present:
• CMC 156 test set
• Mains cable
• Connection cable CMC 156 ↔computer (25-pole)
• Connection cable CMC 156 ↔test object:
These are provided by the user.
• Standard computer with a parallel interface
2.2 System Start
The instructions below can be followed if the computer is set up completely
and the software is installed properly.1
A description of the installation of the CMC software is found in your CMC
software manual, chapter 1 "Installation".
The following procedure is recommended to connect the system components:
Figure 1 Connection CMC 156 and computer
1These instructions refer to a system including a computer and basic device CMC 156, i.e. without
additional amplifiers. If the system is to be operated with external amplifiers, please refer to the
instructions in your CMC SW user's manual, section "Configuring an external amplifier".
Test Set CMC 156
10
Generally: Make sure that the ventilation slots at the rear panel of the
CMC 156 are free and clear!
1. Connect the CMC 156 test set to the computer:
•If the computer is equipped with a parallel printer port, use the 25-pole
cable (VEHK0002) 1that was supplied with the test set to connect the
CMC 156 to the computer.
•If the computer is equipped with a USB port, use an OMICRON
CMUSB-P converter (ordering number VEHZ2007) instead of the
VEHK0002 to connect the CMC 156 to the computer.
2. Connect the CMC 156 and the computer to the power supply. (Power
supply cable is supplied.)
3. Power both units up. CMC 156: ON/OFF switch on the front panel.
4. For further actions, see the Installation in the appropiate software manual.
5. Start the software.
An extensive hardware test is carried out when the software is starting up. If
there is a hardware fault, the software will put out an appropriate message
after starting).
1Only original centronics cable may be used due to the electromagnetic compatibility (EMC)
requirement for the connecting cable.
Table of contents
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