Cirris CH2 Instruction Manual
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Cirris CH2 Instruction Manual

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Cirris CH2
Custom Instructions Manual

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Summary of Contents for Cirris CH2

  • Page 1 Cirris CH2 Custom Instructions Manual...
  • Page 2 CH2 Custom Instructions Manual Copyright by Cirris® Systems Corporation 401 North 5600 West Salt Lake City, UT 84116 All Rights Reserved...

  • Page 3: Table Of Contents

    Adding a Custom Instruction to a Test Program ......... 2 Between Points Resistance Setting ............4 External Instruments Overview ..................... 5 Connecting External Instruments to the CH2 ..........8 Setting up Communication in the External Instrument ......11 Setting up Communication in the CH2 ............12 Common Custom Instructions Comment Response .................
  • Page 4 Bulk HV Isolation Test ................30 Bulk HV Isolation Test with Search ............30 Keithley SourceMeter Custom Instructions Attach 2 Wire ..................... 31 Attach 4 Wire ..................... 31 Enable Faster Hipot .................. 32 Hipot & Measure Current ................32 Hipot & Measure Resistance ..............33 Source &...

  • Page 5: Overview Of Custom Instructions

    A few basic CH2 Custom Instructions come with the Easy-Wire software but most are available when you purchase a license file for CH2 Custom Instructions. In order to get the latest custom instructions, you will likely need to install a current version of the Easy-Wire software. Your Cirris sales representative can help you with both upgrading Easy-Wire software and obtaining a license file for Custom Instructions.

  • Page 6: Adding A Custom Instruction To A Test Program

    Custom Instructions are grouped by categories. For example, all the instructions available for one type of external instrument are grouped as a category. The “Common” and “Cirris CH2” categories come with the Easy-Wire software. Additional categories are added to the list when you purchase a license file.
  • Page 7 After choosing the particular test instruction, other selections appear in the Custom Instruction window. In this example, this particular Custom Instruction requires you enter two test points. When a Custom Instruction requires you enter two points this Between Points selection is presented. This selection will be explained in the next section.

  • Page 8: Between Points Resistance Setting

    When this is the case, you will see the “Between Points” setting. To understand this selection one must understand that Cirris cable testers perform an automatic low voltage shorts test between DUT nets that should not have a direct connection. This automatic shorts test can be turned off using the custom instruction Disable Shorts Test.

  • Page 9: External Instruments

    External Instruments Overview Many CH2 Custom Instructions can be used with test instruments that are external to the CH2 tester. The two types of external instruments that can be used are measuring devices and programmable power supplies. Varying measuring devices can measure complex components in your test and provide greater accuracy.
  • Page 10 Agilent E4980A LCR Meter These LCR meters provide high accuracy inductance and capacitance measurements. They can also measure resistance. These meters should be used with a CH2 tester with the fewest possible points to increase the measurement accuracy. Agilent 4263B LCR Meter...
  • Page 11 CH2 system. Call Cirris for more information if you want to pursue this option. Depending on the external instrument you use, you will need a Cirris interface cable: Keithley/Agilent Meter Cable Use for Keithley 2400 SourceMeter®...

  • Page 12: Connecting External Instruments To The Ch2

    A shielded or unshielded cable will work. Connecting External Instruments to the CH2 The following steps illustrate how to connect one or more external instruments to a CH2 tester. Your CH2 tester should already be set up, if not first see the CH2 Getting Started Guide.
  • Page 13 Instrument Make sure to plug the external instrument into a grounded power outlet. Ideally, plug it into the same grounded power strip or outlet as the CH2 test system. To Complete the Setup See the correct heading below or on the next page corresponding to your test equipment.
  • Page 14 BNC connector block 2. Connect the Euro DIN connector of this cable to the CH2 tester as shown. Note: the Euro DIN connector can be located on any CH2 scanner position. Euro DIN Many people connect the connector to...

  • Page 15: Setting Up Communication In The External Instrument

    When you select the GBIB communication setting you will also select a GBIB address. Note this GBIB address as you will need to match it later on a CH2 Instruction that uses the Custom Instruction. If you are using more than one external instrument with the CH2 system, make sure to set each external instrument to a unique GBIB address.

  • Page 16: Setting Up Communication In The Ch2

    In each test program that uses the external instrument, you need to define how the external instrument is connected to the CH2 tester. You will do this by first setting up a connector type that identifies the connector connecting the external instrument to the CH2 tester.
  • Page 17 To attach the connector for the external instrument: Open the “Attach Connectors” tab, select “External Instrument-16” from the list, and click Attach Selected without using Probe. Enter the first system test point for your external instrument connector. In example here, the first system point of the connector is 609.
  • Page 18 Whenever you use the external instrument in a test program, you must use an “attach custom instruction” before using other external instrument custom instructions. The attach custom instruction tells the tester how pins from the CH2 external instrument connector are wired or mapped to the connections on the external instrument.
  • Page 19 Select the name of your external instrument in the “Custom Instruction Category” field. Select either Attach 2 Wire or Attach 4 Wire as your first instruction. If you want to use a 2-wire test instruction later in your test program, you must use an Attach 2-Wire instruction first in test program.
  • Page 20 You may also insert custom instructions from the Common and CH2 Test Instruction Categories documented in the following pages. For information on the custom instructions for the meter you are using see the following pages: Keithley SourceMeter Custom Instructions ……..

  • Page 21: Common Custom Instructions

    Common Custom Instructions “Common” is a category of Custom Instructions. These custom instructions come free with the current Easy-Wire software and are available to all CH2 users. There are two Common Custom Instructions, “Comment Response” and “User Information”, described in detail below.

  • Page 22: Cirris Ch2 Custom Instructions

    With Compliance Limited 2W Resistance, source current is limited from 10 nanoamps to 1 amp. A standard 2-wire connection is made to the device under test. See the Cirris Website for the differences between 2 and 4-wire Resistance testing. See the Compliance Limited 4W Resistance below for more information.

  • Page 23: Forward And Reverse 2W Resistance

    This custom instruction is similar to the Compliance Limited 2W Resistance custom instruction, which allows the CH2 tester to apply a fixed source current and sense the resulting voltage drop to calculate the DUT resistance. The Forward and Reverse 2W Resistance custom...

  • Page 24: Forward And Reverse 4W Resistance

    Compliance Limited 4W Resistance custom instruction, which allows the CH2 tester to apply a source current to one test point and sense voltage on another point to measure resistance. The Forward and Reverse 4W Resistance custom instruction differs in that the tester applies the source current in both the forward and reverse direction, measures the resistance in both scenarios, and then averages these two measurements to return one resistance measurement.

  • Page 25: Attach Optocoupler Transmitter

    When using this custom instruction, the Attach Optocoupler Transmitter dialog box will allow you to select only certain test points referred to as CH2 Bus 1 points. Likewise only test points referred to as CH2 Bus 2 test points can be used with the Measure Optocoupler Receiver custom instruction.
  • Page 26 When constructing fixturing ensure that both fixture wires from an opto transmitter run to CH2 Bus 1 points. In a like manner make sure that both fixture wires from an opto receiver run to CH2 Bus 2 points. Once you have identified Bus 1 and Bus 2 test points using the Attach Optocoupler Transmitter and Measure Optocoupler Dialog boxes, you can use Probe Points at the bottom of the Test Program Editor to identify these Bus 1 and Bus 2 points on the ends of your fixturing wires.

  • Page 27: Attach Transformer Primary

    Transformer Secondary instruction. When using this custom instruction, the Attach Transformer dialog box will allow you to select only certain test points referred to as CH2 Bus 1 points. Likewise only test points referred to as CH2 Bus 2 test points can be used with the Measure Transformer Secondary instruction.
  • Page 28 Measure Transformer Secondary Parameters The Measure Transformer Secondary Parameters window is shown below. Primary voltage – You may enter a voltage up to 10 volts. This voltage will be applied to the primary windings to allow the measurement on the secondary windings. Primary current –...

  • Page 29: Measure Diode Voltages

    Measure Diode Voltages The Measure Diode Voltages custom instruction is almost identical to the Diode test instruction, but allows you to control the current used to test a diode. The Measure Diode Voltages custom instruction first tests the forward bias of the diode applying the source current to the anode and sinking the cathode to ground, to ensure the forward bias voltage drop is within specified limits.

  • Page 30: Set 4W Probe Point

    Rather than use the standard probe on the CH2 tester, using these custom instructions requires that you use two test points to make a 4-wire probe. An additional two test points are required for the other end of the probed DUT point.

  • Page 31: Introduction To Isolation Testing

    The LV and HV Isolation custom instruction give you complete control over when and how isolation testing occurs in a test. These instructions allow the CH2 to emulate other test equipment in the marketplace. Note that in normal operation the CH2 tester performs an automatic low voltage isolation test.

  • Page 32: Disable Shorts Test

    Disable Shorts Test When testing a DUT, the CH2 tester first uses low voltage to verify the existence of the connections listed in the test program, and then automatically performs a low voltage isolation test called the shorts test. This custom instruction can be placed anywhere in the test instruction list to turn off the automatic shorts test.

  • Page 33: Bulk Lv Isolation Test

    The isolation of the specified test point will be tested relative to all test points with higher system point numbers in the CH2 test system. If using Higher to check for the isolation of a net, it is important to specify the highest system point of the net.

  • Page 34: Bulk Hv Isolation Test

    The isolation of the specified test point will be tested relative to all test points with higher system point numbers in the CH2 test system. If using Higher to check for the isolation of a net, it is important to specify the highest system point of the net.

  • Page 35: Keithley Sourcemeter Custom Instructions

    DUT while the Keithley is operating. The CH2 test system is used only as a switching matrix and as an interface for the Keithley meter. Any test voltage over 42 volts can be lethal. High voltage (over 42 volts) can be fatal if the exposure period and current levels are sufficiently high.

  • Page 36: Enable Faster Hipot

    Using the head point will ensure that the CH2 finds other points of the net, and will raise these points as when the specified point is raised to the hipot voltage.

  • Page 37: Hipot & Measure Resistance

    Disable background measurement for this instruction • By selecting this option, the tester will take the measurement from the last instruction and apply it to the current instruction. This will lower the amount of time spent on testing. In the case that no background measurement has been taken previously, it is assumed that the background current is equal to zero.

  • Page 38: Source & Measure 2W Voltage

    Source & Measure 2W Voltage Source & Measure 2W Voltage allows you to source a precision current that will be applied to the specified Hi point while the specified Lo point is pulled to ground. After the dwell time has elapsed, the voltage on the Hi point will be measured.

  • Page 39: User Defined 4-Wire Measure

    User Defined 4-Wire Measure User Defined 4-Wire Measure allows you to issue SCPI compliant commands to the Keithley meter to create your own custom test instruction. Using these SCPI commands requires much technical ability, ® SourceMeters practice, and patience. Refer to the Keithley Manual for more information.

  • Page 40: Agilent Lcr Meter Custom Instructions

    Parasitic capacitance also exists in the CH2 tester. Using as few of test points as possible in the CH2 chassis connected to the LCR Meter, such as 160 or 320 points, will minimize this capacitance. Also calculate or experiment to choose a sine wave frequency that gives the best results on your DUT.

  • Page 41: Power Supply Custom Instructions

    SCPI compliant to provide variable voltages to your device under test. The Cirris Energization Unit is used with the power supply and the CH2 tester to route the supply voltages to the E points connected to your device under test. For more information on the setting up the Energization Unit and building fixturing to the device under test, see the Energization Unit Manual and the Easy-Wire help system.

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