± 40 V DC BIAS ADAPTER MODEL 2191A
Contents
1. 4 1 Overhaul Instructions 1 4411 2 2 4 1 Preparation for Repair 4 2 Expedite Repair and Calibration Form 4 3 wend Peg es cue DURER OR 4 4 10 TEGAM WAY GENEVA OHIO 44041 440 466 6100 FAX 440 466 6110 sales tegam com INSTRUMENT DESCRIPTION m 5 5 SECTION 1 INSTRUMENT DESCRIPTION 1 1 Description The TEGAM Model 2191A DC Bias Adapter is an electronic instrument designed as an accessory to expand the performance of TEGAM brand or other standard LCR meters When connected properly the 2191A allows the user to apply up to 40 VDC to bias a device under test DUT like a capacitor or provide up to 40 VDC of input protection to the LCR meter when used to test energized components like batteries The 2191A is a passive device requiring no battery or external power to operate The 2191A has eight BNC I O connectors that allow it to be connected inline between the user s LCR meter and the DUT via four 6 BNC cables provided and a set of four wire test leads user supplied The connectors are labeled Hrorce High Current Drive Hsense High Voltage Sense Lsense Low Voltage Sense and Lrorce Low Current Drive A ninth BNC connector labeled EXT DC BIAS is provided as a bias voltage input where up to 40 VDC may be applied 1 2 Performance Characteri2. on the TEST SAMPLE FIXTURE side of 2191A between the center pin 10 TEGAM WAY GENEVA OHIO 44041 440 466 6100 FAX 440 466 6110 sales tegam com 3 3 TEGAM OPERATING INSTRUCTIONS of the Hrorce BNC and shell of the Lrorce BNC measurement of nearly zero volts should be observed 3 3 Procedure for a DC Supply that presents low impedance when in the off state 1 Once a DC bias voltage has been applied either turn off the power supply or disable the output if the supply has this feature Power supplies may offer a front panel switch or other mechanism that will disable the output presenting a low impedance at its connecting terminals 2 Allow 30 seconds for the internal DC blocking capacitor to discharge 3 If verification is required that the stored energy voltage is dissipated use a voltmeter and measure on the TEST SAMPLE FIXTURE side of 2191A between the center pin of the Hrorce BNC and shell of the Lfo ce BNC measurement of nearly zero volts should be observed DC Bias Current Limit T Current Limit T X Hforce_LCR gt Hforce_Sample Hsense LCR jc Hsense Sample Lsense LCR 4 Llsense Sample Lforce LCR 4 Sample Figure 3 Block Diagram 10 TEGAM WAY GENEVA OHIO 44041 440 466 6100 FAX 440 466 6110 sales tegam com 3 4 OPERATING INSTRUCTIONS TEGAM WO33 AC 39404 3SN3S4 3SN3S 39304 V svig 2 1X3 N
3. TEGAM Inc warranty does not apply to defects resulting from unauthorized modification or misuse of the product or any part This warranty does not apply to fuses batteries or damage to the instrument caused by battery leakage The foregoing warranty of TEGAM is in lieu of all other warranties expressed or implied TEGAM specifically disclaims any implied warranties of merchantability or fitness for a particular purpose In no event will TEGAM be liable for special or consequential damages Purchaser s sole and exclusive remedy in the event any item fails to comply with the foregoing express warranty of TEGAM shall be to return the item to TEGAM shipping charges prepaid and at the option of TEGAM obtain a replacement item or a refund of the purchase price 10 TEGAM WAY GENEVA OHIO 44041 440 466 6100 FAX 440 466 6110 sales tegam com 4 4 TEGAM SERVICE INFORMATION Contact Information TEGAM INC 10 TEGAM WAY GENEVA OHIO 44041 CAGE Code 49374 WEB http www tegam com 10 TEGAM WAY GENEVA OHIO 44041 440 466 6100 FAX 440 466 6110 sales tegam com 4 5
4. the test leads are shorted as shown in figure 1b before performing the SHORT circuit zero correction procedure Please refer to the LCR meter s user manual to find the specific lead compensation procedure and execute it WARNING DO NOT CONNECT THE BIAS VOLTAGE WHILE CORRECTION IS IN PROGRESS LCR METER LCR METER DC BIAS VOLTAGE IN CONNECTOR DC BIAS VOLTAGE IN CONNECTOR Figure 1a Open Correction Figure 1b Short Correction 10 TEGAM WAY GENEVA OHIO 44041 440 466 6100 FAX 440 466 6110 sales tegam com 2 2 TEGAM OPERATING INSTRUCTIONS SECTION 3 OPERATING INSTRUCTIONS Measurement Method For safety reason follow the following procedure carefully when a DC Bias voltage needs to be applied to the DUT 1 Perform open and short circuit compensation 2 Connect the DUT capacitor 3 Set the output voltage of the external DC bias supply to 0 V Increase the output voltage progressively to reach the required value 4 Measure the required parameters capacitance dissipation factor etc of the DUT 5 Gradually decrease the voltage of the external DC bias supply until it reaches 0 V 6 Remove the DUT WARNINGS DO NOT SHORT THE HIGH AND LOW TERMINALS WHEN THE VOLTAGE SOURCE IS TURNED ON FOR HIGH VALUE CAPACITORS ALLOW SUFFICIENT TIME FOR THE CAPACITOR TO CHARGE TO THE APPLIED VOLTAGE WHEN A POSITIVE BIAS VOLTAGE IS USED THE POSITIVE TERMINAL OF AN ELECTROLYTI
5. to obtain an RMA Returned Material Authorization number TEGAM customer service may reached the website www tegam com by calling 440 466 6100 All Locations OR 800 666 1010 United States Only The RMA number is unique to your instrument Assigning one prior to returning the instrument will help insure timely and accurate service to your instrument In addition your detailed written description of the problem attached to the instrument prior to shipment will help to reduce repair time When describing the problem please consider such details as measurement range test conditions that may cause the symptoms or any other observations that you have that might assist in the troubleshooting effort 10 TEGAM WAY GENEVA OHIO 44041 440 466 6100 FAX 440 466 6110 sales tegam com 4 2 TEGAM SERVICE INFORMATION Expedite Repair amp Calibration Form Use this form to provide additional repair information and service instructions The Completion of this form and including it with your instrument will expedite the processing and repair process RMA Instrument Model Serial Number Company Technical Phone Contact Number Additional Contact Info Repair Instructions 0 Evaluation 0 Calibration Only 0 Repair Only Repair amp Calibration O 2540 Detailed Symptoms Include information such as measurement range instrument settings type
6. C CAPACITOR MUST BE CONNECTED TO THE INSTRUMENTS HIGH TERMINAL WHEN A NEGATIVE BIAS VOLTAGE IS USED CONNECT AN ELECTROLYTIC CAPACITOR S NEGATIVE TERMINAL TO THE INSTRUMENT S HIGH TERMINAL DO NOT TOUCH THE CONNECTORS WHEN THEY ARE CONNECTED TO EXTERNAL CIRCUITS LETHAL VOLTAGES MAY BE PRESENT DO NOT OPERATE THIS INSTRUMENT IN PRESENCE OF FLAMMABLE GASSES OR FUMES 10 TEGAM WAY GENEVA OHIO 44041 440 466 6100 FAX 440 466 6110 sales tegam com 3 1 TEGAM OPERATING INSTRUCTIONS Please refer to the following diagram for connections VOLTAGE SOURCE Figure 2 Connection Diagram 3 1 Safe Discharge Operating Procedure WARNING FAILURE TO PROPERLY DISCHARGE THE INTERNAL DC BLOCKING CAPACITOR MAY RESULT IN SEVERE DAMAGE TO THE LCR METER S INPUT PROTECTION AND MEASUREMENT CIRCUITS The 21914A s has an internal DC blocking capacitor When DC bias voltage is applied this DC blocking capacitor will charge to nearly the same voltage If the test leads or test adapter 10 TEGAM WAY GENEVA OHIO 44041 440 466 6100 FAX 440 466 6110 sales tegam com 3 2 TEGAM OPERATING INSTRUCTIONS connections are shorted the stored energy within this DC blocking capacitor may source currents through the input protection and measurement circuits of the LCR meter with little current limitation However using the internal current limiting feature designed into the EXT DC BIAS connection
7. OILO3NNOO 8313MW 821 EIC AOL 3un1XI3 JIdNWYS 1531 20404 3684468 3SN3S 30803 0 10jonpuo Auy yndyno yeed APF SVId 38 A0v ETEEN Figure 4 Front and Rear Panel 10 TEGAM WAY GENEVA OHIO 44041 440 466 6100 FAX 440 466 6110 sales tegam com 3 5 TEGAM SERVICE INFORMATION SECTION 4 MAINTENANCE amp SERVICE INFORMATION 4 1 Inspection The 2191A and its interface cables should be inspected periodically to insure they are in good working condition 4 2 Cleaning The instrument should be cleaned periodically as is necessary using mild soap and a damp cloth both followed by second damp rinsing cloth DO NOT use alcohol solvents or harsh chemicals to clean 4 3 Preparation for Shipment The original shipping carton is not reusable The Model 2191A requires no special covering preservation or special cradles Packaging must provide sufficient resilient material in accordance with standard packaging practices to prevent excessive shock during shipment 4 4 Overhaul Instructions The 2191A requires no periodic overhaul other than routine cleaning and inspection of cables 10 TEGAM WAY GENEVA OHIO 44041 440 466 6100 FAX 440 466 6110 sales tegam com 4 1 TEGAM SERVICE INFORMATION Preparation for Repair Service If damage or a malfunction occurs that requires repair service contact TEGAM customer service
8. TEGAM 40 V DC BIAS ADAPTER MODEL 2191A Instruction Manual PN 2191A 900 01 Publication Date September 2013 REV B NOTE This User s Manual was as current as possible when this product was manufactured However products are constantly being updated and improved To ensure you have the latest documentation refer to www tegam com 10 TEGAM WAY GENEVA OHIO 44041 440 466 6100 FAX 440 466 6110 sales tegam com TEGAM TABLE OF CONTENTS TABLE OF CONTENTS 1 INSTRUMENT DESCRIPTION Descriptor 1 1 Performance Characteristics 1 1 Unpacking and Inspection 2 1 List of Items Furnished 2 2 77 1 2 2 PREPARATION FOR USE AND INSTALLATION Connections to DUT nein 2 1 OPEN SHORT Correction 3 1 Figure 1a 1b OPEN SHORT Correction 3 2 3 OPERATING INSTRUCTIONS Measurement Method 3 1 Figure 2 Connection 3 2 Safe Discharge Operating Procedure 3 2 Figure 3 Block 3 4 Figure 4 Front and Rear 3 5 4 MAINTENANCE amp SERVICE INFORMATION DET 4 1 Clea NNO LT 4 1 Preparation for
9. ected between the input connectors of your LCR meter and the end of the 2191A labeled LCR METER CONNECTION Your test leads or kelvin probes are then attached accordingly to the four BNC connectors on the other end of the 2191A labeled TEST SAMPLE FIXTURE Please note that BNC connectors at both ends of the 2191A include convenient labeling for Hrorce Hsense Lrorce The DC Bias terminal may be connected to an external voltage source to apply dc bias voltage to the DUT No button or switch is present on the instrument OPEN SHORT Correction The 2191A Bias Adapter has inherent residual resistance stray capacitance and residual inductance If not properly compensated measurement accuracy may be degraded Once the 2191A and test probes are connected to the LCR meter the user must complete an OPEN and SHORT compensation to cancel these residuals and minimize measurement error The OPEN circuit zero correction procedure compensates for stray capacitance conductance between test leads fixture Make sure that the test leads are in the open state as shown in figure 1a before performing the OPEN circuit zero correction procedure 10 TEGAM WAY GENEVA OHIO 44041 440 466 6100 FAX 440 466 6110 sales tegam com 2 1 TEGAM PREPARATION FOR USE AND INSTALLATION The SHORT circuit zero correction procedure compensates for residual resistance and inductance in the test leads fixture Make sure that
10. of components being tested is the problem intermittent When is the problem most frequent has anything changed with the application since the last time the instrument was used etc 10 TEGAM WAY GENEVA OHIO 44041 440 466 6100 FAX 440 466 6110 sales tegam com 4 3 TEGAM SERVICE INFORMATION Warranty TEGAM Inc warrants this product to be free from defects in material and workmanship for a period of one year from the date of shipment During this warranty period if a product proves to be defective TEGAM Inc at its option will either repair the defective product without charge for parts and labor or exchange any product that proves to be defective In order to exercise this warranty TEGAM Inc must be notified of the defective product before the expiration of the warranty period The customer shall be responsible for packaging and shipping the product to the designated TEGAM service center with shipping charges prepaid TEGAM Inc shall pay for the return of the product to the customer if the shipment is to a location within the country in which the TEGAM service center is located The customer shall be responsible for paying all shipping duties taxes and additional costs if the product is transported to any other locations Repaired products are warranted for the remaining balance of the original warranty or 90 days whichever period is longer Warranty Limitations The
11. stics External DC Bias voltage Up to 40 VDC Frequency Range 100 Hz to 1 MHz Current Limiting Resistor 4 5 96 10 TEGAM WAY GENEVA OHIO 44041 440 466 6100 FAX 440 466 6110 sales tegam com 1 1 TEGAM INSTRUMENT DESCRIPTION Dimensions 140 mm 5 5 x 190 5 mm 7 5 x 50 8 mm 27 Weight 1 76 Ib 0 8 kg Environmental 0 to 55 C lt 95 RH non condensing Capacitive Component Charge Time The time required for a capacitive component to charge through the input resistance is calculated using the following formula T s 1 6 0 02 x 5 where is the capacitance of the DUT in 1 3 Unpacking and Inspection Upon receipt the 2191A should be carefully unpacked and removed from the shipping container Separate the unit from the packing material and inspect the instrument for any external damage If any components appear to be damaged or missing contact TEGAM immediately at 800 666 1010 or sales tegam com for corrective action 1 4 List of Items Furnished 1 each Model 2191A 1 each Instruction Manual PN 2191A 900 01 4 each six inch BNC male to BNC male cables PN CA 115 6 10 TEGAM WAY GENEVA OHIO 44041 440 466 6100 FAX 440 466 6110 sales tegam com 1 2 TEGAM PREPARATION FOR USE AND INSTALLATION SECTION 2 PREPARATION FOR USE AND INSTALLATION Connections to DUT Four BNC cables are provided to connect the 2191A to your LCR Meter These four cables are conn
12. the stored energy may be safely discharged One of the procedures described below is required to protect the measurement system Likewise either procedure must be followed for each and any new device under test DUT That is if a new DUT is to be measured discharge the 2191A The procedures described below can be used whether a capacitive device under test DUT is connected or not However if a battery is the DUT it must be removed prior to discharging the system NOTE At no time should a charged capacitor or capacitive device be connected to the 2191A Discharge any capacitors before any measurements Likewise a battery should not be connected to the 2191A until a DC bias voltage equivalent to the battery s terminal voltage has been applied As stated above severe damage may occur to protection and measurement circuits of the LCR meter 3 2 Procedure for a DC Supply that does not present low impedance when in the off state 1 Once a DC bias voltage has been applied remove the cable from the EXT DC BIAS BNC connector Use a BNC shorting cap e g Pomona P N 5085 and place it on the EXT DC BIAS BNC connector or 2 With the power supply cable connected at the DC Bias BNC remove your connection at the DC supply and short the ends of that cable 3 Allow 30 seconds for the internal DC blocking capacitor to discharge 4 If verification is required that the stored energy voltage is dissipated use a voltmeter and measure
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