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Sourcetronic ST2684A Manual

Insulation resistance meter
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SOURCETRONIC − Qualitäts-Elektronik für Service, Labor und Produktion
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Insulation resistance meter ST2684A

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  • Page 1 SOURCETRONIC − Qualitäts-Elektronik für Service, Labor und Produktion Manual Insulation resistance meter ST2684A...
  • Page 2 ST2684/A Operation Manual Ver1.01 Manual Printing History The manual’s printing date indicates its current edition. The printing date changes when a new edition is printed. (Minor corrections and updates that are incorporated at reprint do not cause the date to change.) The manual edition changes when extensive technical changes are incorporated.
  • Page 3 ST2684/A Operation Manual Ver1.01 Safety Cautions: The instrument is class I. Make sure that there is a ground Ground connection in the mains outlet. Failure to do this may cause personnel injury because of the existence of static or induced electricity on the instrument cover.

  • Page 4: Table Of Contents

    ST2684/A Operation Manual Contents Contents Chapter 1 Introduction ........................1 1.1 Introduction ..........................1 1.2 Service conditions ........................1  1.2.1 Power .......................... 1 1.2.2 Enviromental temperature and humidity ................1 1.2.3 Warm-up ..........................1 1.2.4 Cautions ........................2 1.3 Dimension and weight ......................... 2 1.4 Safety ............................
  • Page 5 ST2684/A Operation Manual Contents Chapter 4 [SETUP] .......................... 22 4.1 <MEASURE SETUP> ......................22 4.1.1 RESULT .......................... 23 4.1.2 HV2 TRACK ........................23 4.1.3 DISCHARGE ........................24 4.1.4 MEASURE DELAY ....................... 24 4.1.5 CHARGE TIME ......................25 4.1.6 HUM REJECT ........................ 26 4.1.7 CONTACT CHECK ......................
  • Page 6 ST2684/A Operation Manual Contents 5.1 <SYSTEM SETUP> ........................51 5.1.1 L CD contrast ........................51 5.1.2 LCD Style ........................51 5.1.3 Pass beeper ........................52 5.1.4 Fail beeper ........................52 5.1.5 Language ......................... 53 5.1.6 Handler ..........................53 5.1.7 Password ......................... 53 5.1.8 Bus mode ........................
  • Page 7 ST2684/A Operation Manual Contents 8.4.2 Install drive ........................82 Chapter 9 Command Reference ....................... 83 9.1 GPIB common commands for ST2684 ..................83 9.2 Command structure ......................85 9.3 Command syntax ........................86 9.4 Input format ..........................86 9.5 SCPI commands ........................87 9.5.1 System commands......................

  • Page 8: Chapter 1 Introduction

    1.1 Introduction ST2684/ST2684A is an insulation resistance meter that is high in speed and accuracy. It bears the advantages of LCD display, user-friendly menu, simple operations and great conveniences. Interfaces, such as USB, HANDLER RS232C, scanning and IEEE488 (optional) are available, making it possible for the instrument to be used in an automatic sorting system and PC remote control operations.

  • Page 9: Cautions

    ST2684/A Operation Manual Chapter 1 Introduction 1.2.4 Cautions （1） Please do not operate the instrument in the places where is vibrative, dusty, under direct sunlight, or where there is corrosive air. （2） Please store the instrument in an airy room where temperature is between 5℃ and 40℃, relative humidity is less than 85% RH and no corrosive impurities and direct sunlight exists.

  • Page 10: Electromagnetic Compatibility

    ST2684/A Operation Manual Chapter 1 Introduction 1.5 Electromagnetic compatibility Power instantaneous sensitivity is based on GB6833.4. Transmission sensitivity is base on GB6833.6. Radiated interference is based on GB6833.10.

  • Page 11: Chapter 2 Introduction To Front And Rear Panels

    2.1 Introduction to front panel Figure 2-1 Front Panel Introduction to the front panel is as follows: Table 2-1 Introduction to the front panel Name Introduction ST2684 or ST2684A Brand and model Insulation Resistance Meter 320*240 dot-matrix displaying measurement parameters, status, measurement results, etc.
  • Page 12 ST2684/A Operation Manual Chapter 3 [DISP] instrument is set in manual trigger mode. The indicator lights up when the voltage across HV indicator（） the two test terminals is higher than 0.4V; otherwise it is off. The indicator lights up when the limit setup PASS indicator requirements are met;...

  • Page 13: Introduction To Rear Panel

    ST2684/A Operation Manual Chapter 3 [DISP] 2.2 Introduction to rear panel GPIB HV2 OUTPUT RATING FUSE 110V 60Hz T5AL 220V 50Hz T2AL HANDLER SCANNER DEVICE RS-232C Figure 2-2 Rear Panel Introduction to the rear panel is as follows: Table 2-2 Introduction to the rear panel Name Introduction HV2（-）: negative voltage output terminal ...

  • Page 14: Display Zone

    ST2684/A Operation Manual Chapter 3 [DISP] DEVICE interface. The instrument can connect with a multi-channel SCANNER scanner through this interface to realize a multi-channel test. An automatic test system can be conveniently constructed via this interface to fulfill automatic tests. The instrument outputs bin compare result HANDLER signals and handshake signals, meanwhile a “start-up”...

  • Page 15: Main Menu Keys And Their Corresponding Display

    ST2684/A Operation Manual Chapter 3 [DISP] Prompt information Indicate all prompt information and the user-input data. 2.4 Main menu keys and their corresponding display pages 2.4.1 DISP Press this key to enter into MEASURE DISP. The following items will be displayed in this page (select corresponding functions by softkeys, the same as below).

  • Page 16: Start-Up

    ST2684/A Operation Manual Chapter 3 [DISP] displayed with highlight. Softkey functions corresponding to the currently selected zone will be displayed in the softkey zone. User can choose the desired function by pressing a softkey. Numerical keys, [BACKSPACE] and [ENTER] are used to input data. Once a numerical key is pressed, unit softkeys that can be used will be displayed in the softkey zone.

  • Page 17: Chapter 3 [Disp]

    ST2684/A Operation Manual Chapter 3 [DISP] Chapter 3 [DISP] 3.1 <MEASURE DISP> Press [DISP] to enter into <MEASURE DISP>, as is shown in figure 3-1. Figure 3-1 Measurement Display Page The measurement result will be displayed in large character in this page. The following measurement parameters can be set in this page.

  • Page 18: Hv1

    1） Move the cursor to HV1, the following items will be displayed in the softkey zone. ↑(++)  This is a coarse adjustment key to increase the voltage in accordance with the sequence of some common-used voltage points. Take ST2684A for example, the common-used voltage points are as follows: 10V，50V，100V，250V，500V，1000V，1005V. ↑(+) ...

  • Page 19: Hv2

    Press one of above softkeys to set the charge current. 3.1.3 HV2 HV2 output is available only on ST2684 but not on ST2684A. This function is used to set the voltage (preset voltage) output of HV2. There are two voltage settings available: voltage independent mode (HV2 TRACK: OFF) and voltage track mode (HV2 TRACK: ON).

  • Page 20: I2_Max

    ST2684/A Operation Manual Chapter 3 [DISP] Operational steps for the HV2 offset voltage setting: 1) Move the cursor to HV2, the following items will be displayed in the softkey zone: ↑（+） This softkey is used to increase the offset voltage of HV2 by 0.1V. ↓（-）...

  • Page 21: Average (Avg)

    ST2684/A Operation Manual Chapter 3 [DISP] 3.1.6 Average (AVG) ST2684/A can average results of two or more measurings. The average times ranges from 1 to 100 by a resolution of 1. Operational steps for the average times setting: Move the cursor to AVG, the following items will be displayed in the softkey zone: ↑（+）...

  • Page 22: Trig

    ST2684/A Operation Manual Chapter 3 [DISP] Range 1:100µA – 1mA; input internal impedance 10 kΩ Range 2:10µA – 100µA; input internal impedance 10 kΩ Range 3:1µA – 10µA; input internal impedance 10 kΩ Range 4:100nA – 1µA; input internal impedance 10 kΩ Range 5:10nA –...

  • Page 23: Mode

    ST2684/A Operation Manual Chapter 3 [DISP] 3.1.10 MODE ST2684/A has 2 test modes: SINGLE and CONTINUE. In SINGLE mode and by pressing [TEST] one time, the instrument makes a test in the following sequence of trigger, charge, wait, test and end test. In CONTINUE mode and by pressing [TEST], the instrument will make tests continuously;...

  • Page 24: File

    ST2684/A Operation Manual Chapter 3 [DISP] pressing [HV], it will start or stop the high voltage output. ———————————————————————————————————— 3.2.1 FILE See 5.2 for details about the <FILE MANAGE> function. 3.3 BARGRAPH DISP Press [DISP] and select BAR. DISP to enter into the <BARGRAPH DISP> page. Bargraph display function is used to substitute and simulate the functions of multimeters.

  • Page 25: Bar Scale

    ST2684/A Operation Manual Chapter 3 [DISP] ———————————————————————————————————— NOTE: In <BARGRAPH DISP>, pressing [TEST], the instrument will start or stop a test; pressing [HV], it will start or stop the high voltage output. ———————————————————————————————————— 3.3.1 BAR SCALE ST2684/A has two bar scale settings: resistance and current, as follows: Press [SETUP] and select RESULT, CURR should be chosen in the softkey zone.

  • Page 26: File

    ST2684/A Operation Manual Chapter 3 [DISP] 2） User can input the desired bar scale number by numeric keys and press [ENTER] to end inputting. ——————————————————————————————— NOTE: Switching the output result (resistance or current), the bar scale number will reset to 0, that is to select the scale automatically.

  • Page 27: Xy Graph

    ST2684/A Operation Manual Chapter 3 [DISP] 3.5 XY GRAPH [DISP] → MORE 1/2→ XY GRAPH→ <XY GRAPH> Figure 3-5 displays a XY curve tested with no load, where, the shape of the curve is affected by the environment. This page is a single display page which can be set in the <XY SETUP> page. ————————————————————————————————————...

  • Page 28: File

    ST2684/A Operation Manual Chapter 3 [DISP] ———————————————————————————————————— NOTE: In <SCAN DISP>, pressing [TEST], the instrument will start or stop a test; pressing [HV], it will start or stop the high voltage output. ———————————————————————————————————— 3.6.1 FILE See 5.2 for details about the <FILE MANAGE> function.

  • Page 29: Chapter 4 [Setup]

    ST2684/A Operation Manual Chapter 4 [SETUP] Chapter 4 [SETUP] 4.1 <MEASURE SETUP> Press [SETUP] to enter into the <MEASURE SETUP> page. Figure 4-1: The following parameters can be set on <MEASURE SETUP>. （HV1）  HV1 output I1 maximum charge current（I1_MAX） ...

  • Page 30: Result

    ST2684/A Operation Manual Chapter 4 [SETUP] （HV_1） HV1 output  I1 maximum charge current（I1_MAX）  （HV2） HV2 output  I2 maximum charge current（I2_MAX）  （SPEED） Test speed  （AVG） Average times  （RANGE） Measure range  （R in_L） Measure input internal impedance ...

  • Page 31: Discharge

    ST2684/A Operation Manual Chapter 4 [SETUP]  2) Use above softkeys to set HV2 TRACK to ON or OFF. 4.1.3 DISCHARGE When the test is finished, ST2684/A can be set to turn on or off the discharge function. ———————————————————————————————————— NOTE: This function is only applicable to single mode. ————————————————————————————————————...

  • Page 32: Charge Time

    ST2684/A Operation Manual Chapter 4 [SETUP] ■ msec ■ sec Above softkeys are applied to select the time unit and to end inputting. When [ENTER] is used to confirm inputting, the default unit is S. 4.1.5 CHARGE TIME The charge time on ST2684/A can be set. This function can ensure capacitive components are charged rapidly and speed the test.

  • Page 33: Hum Reject

    ST2684/A Operation Manual Chapter 4 [SETUP] 4.1.6 HUM REJECT For the difference of external source, it is essential to toggle the power frequency so as to ensure the test accuracy. The power frequency can be toggled between 50Hz (the default frequency) and 60Hz. Operational steps for the HUM REJECT setting: 1）Move the cursor to HUM REJECT, the following softkeys are displayed: 50Hz...

  • Page 34: Comp: On/Off

    ST2684/A Operation Manual Chapter 4 [SETUP] Comparator function and 4 bin limits can be set on this page. The result can be divided into up to 5 bins (from BIN1 to BIN5). If ST2684 has installed a HANDLER interface and is used in an automatic test sorting system, the comparator function will be quite useful.

  • Page 35: Limit Mode Of Compare Function

    ST2684/A Operation Manual Chapter 4 [SETUP] Operational steps for comparator function ON/OFF: Move the cursor to COMP, the following softkeys will be displayed.   Use above softkeys to set the comparator function ON or OFF. 4.2.2 Limit mode of compare function Compare function provides two modes as shown in figure 4-2-1.

  • Page 36: Setting Nominal Value

    ST2684/A Operation Manual Chapter 4 [SETUP] % TOL  The key is used to set the limit mode as percentage tolerance mode. ABS TOL  The key is used to set the limit mode as absolute tolerance mode. SEQ MODE ...

  • Page 37: File Manage

    ST2684/A Operation Manual Chapter 4 [SETUP] default unit is the same as that input last time. After inputting the low limit value of bin1, the cursor is jumped to HIGH of bin1. Input the high limit of bin1. The cursor is jumped to HIGH of bin2. As the limit mode of compare function is sequential mode, the low limit of bin2 is equal to the high limit of bin1.

  • Page 38: Bar Scale

    ST2684/A Operation Manual Chapter 4 [SETUP] In the <BARGRAPH SETUP> page, the following control parameters can be set in this page: （Select the serial number）  BAR SCALE FILE  4.3.1 BAR SCALE There are two bar scale setups: RES (resistance) and CURR (current). In CURR mode, the setting range is from 0 to 8.

  • Page 39: File

    ST2684/A Operation Manual Chapter 4 [SETUP] 100GΩ – 10TΩ 1TΩ – 100TΩ 10TΩ – 1PΩ Operational steps for setting bar scale: 1) Move the cursor to BAR SCALE, the following softkeys will be displayed: ↑(+) This key is used to increase the serial number of bar graph. ...

  • Page 40: Selected Seq

    ST2684/A Operation Manual Chapter 4 [SETUP] The following control parameters can be set in the <SEQUENCE SETUP> page: （SELECTED SEQ.） Select the sequence number  DEFAULT SEQ.  User SEQ.  FILE  4.4.1 SELECTED SEQ. It is used to select the reference test sequence for the <SEQUENCE DISP> page. Two test sequences are available: default sequence and user sequence.

  • Page 41: User Seq

    ST2684/A Operation Manual Chapter 4 [SETUP] limit is met. At 20s or 60s, if the low limit cannot be met, the measure will stops like that happens at 20 SEC SEQ. or 60 SEC SEQ... Operational steps for setting the default sequence: 1）...

  • Page 42: Seq. Content

    ST2684/A Operation Manual Chapter 4 [SETUP] 4.5 SEQ. CONTENT Move the cursor to a default or user sequence, press SCAN or EDIT to enter into the <SEQ. CONTENT> page. Figure 4-5: This page is used to edit the current user sequence, and up to 18 steps can be set. Following items can be set: (1) NO., (2) ITEM, (3) HV, (4) RANG, (5) AVG, (6) LOW, UPP, (7) TIME.
  • Page 43 ST2684/A Operation Manual Chapter 4 [SETUP] Figure 4.5.1 Test Schematic Diagram Figure 4.5.1 shows the HV supply and the input stage of the current amplifier. The test object is a capacitance. First, the capacitance is charged, the start current limited by the current limit setting of the HV supply. In order to speed up charging and to protect the current amplifier, the charge relay short circuits the input during charging.

  • Page 44: Item

    ST2684/A Operation Manual Chapter 4 [SETUP] The charge relay is activated during the preset charge time, which is longer than it takes for the current to fall below 2mA. When the charge time expires, the charge relay is deactivated. Immediately after this the measured current is very low (and hence the calculated resistance very high), but in the period after the absorption current begins to flow through the capacitor.
  • Page 45 ST2684/A Operation Manual Chapter 4 [SETUP] Input parameters: (1) HV (2) TIME Current charge time is generally determined by the below formula: LIMT Where I is the charge current limit. The charge current limit can be set in the corresponding current zone of <MEASURE DISP> or <MEASURE SETUP>.
  • Page 46 ST2684/A Operation Manual Chapter 4 [SETUP] 4.5.2.4 MEAS. CONT. Function: Measure continuously (similar to the earlier WAIT except range, average times, limits that can be specified.) Input parameters: (1) HV (2) RANG (3) AVG (4) LOW (5) HIGH (6) TIME During the test, the display of PASS/ FAIL will change after the low or the high limit is set.
  • Page 47 Insert a blank line and uplift the data in the next line. 2> Use above softkeys to achieve relative operations. 4.5.4 HV Voltage setting range: ST2684: 10 ---- 500V ST2684A: 10-----1000V ———————————————————————————————————— NOTE: Whether set HV or not depends on the selected sequence command. ————————————————————————————————————...

  • Page 48: Rang

    ST2684/A Operation Manual Chapter 4 [SETUP] 100V，250V，500V，1000V. ↑(+)  This is a fine adjustment softkey used to increase the voltage by 1V. ↓(-)  This is a fine adjustment softkey used to decrease the voltage by 1V. ↓(--)  This is a coarse adjustment softkey used to decrease the voltage in accordance with the sequence of some common-used voltage points.

  • Page 49: Low, High

    ST2684/A Operation Manual Chapter 4 [SETUP] ↑（+）  Use this key to increase the average times. ↓（-）  Use this key to decrease the average times. 2）Use above softkeys to select the average times or numerical keys and [ENTER] to input the desired average times.

  • Page 50: Time

    ST2684/A Operation Manual Chapter 4 [SETUP] 4.5.8 TIME This zone is used to the time required by each step. Operational steps for setting the time in the sequence content page: 1）Move the cursor to TIME, the following items will be displayed: ↑（+）...

  • Page 51: X-Scale

    ST2684/A Operation Manual Chapter 4 [SETUP] The following parameters can be set in the <XY GRAPH SETUP> page: ■ Select the X-scale (X-SCALE) ■ Set time (SET TIME) ■ Select the Y-scale (Y-SCALE) ■ Current scope (CUR SCOPE) 4.6.1 X-SCALE Select the X-scale of the XY graph.

  • Page 52: Y-Scale

    ST2684/A Operation Manual Chapter 4 [SETUP] 2） Use above softkeys to set the total test time, or numerical keys and [ENTER] to input the time. By the latter way, the default unit will be s. 4.6.3 Y-SCALE Operational steps for setting the Y-scale: 1）Move the cursor to Y-SCALE, the following softkeys will be displayed: ...

  • Page 53: Scan Setup

    ST2684/A Operation Manual Chapter 4 [SETUP] 4.7 SCAN SETUP Press [SETUP], and then MORE 1/2 and SCAN SETUP to enter into the <SCAN SETUP> page. Figure 4-7: The following parameters can be set in the <SCAN SETUP> page: ■ SELECTED SEQ. ■...

  • Page 54: Scan Start Num

    ST2684/A Operation Manual Chapter 4 [SETUP] USER3  USER4  MORE 2/2  3）If the desired sequence is missed, repeat step1 and step 2 to select the desired one. 4.7.2 SCAN START NUM There are 32 scan channels at most and the number ranges from 0 to 31. Operational steps for setting the scan start number: 1）Move the cursor to SCAN START NUM, the following softkeys will be displayed: ↑（+）...

  • Page 55: Scan Connect

    ST2684/A Operation Manual Chapter 4 [SETUP] This softkey is used to set the display mode as PASS/ FAIL. （2）Use above softkeys to set the scan result display mode. 4.7.5 SCAN CONNECT This zone is used to check the scanner is connected correctly or not. Operational steps for setting scan connect: （1）Move the cursor to SCAN CONNECT, the following softkey will be displayed: ■...

  • Page 56: Open Corr：on/Off

    ST2684/A Operation Manual Chapter 4 [SETUP] ■ LOAD CORR ■ REFERENCE ■ FILE 4.8.1 OPEN CORR：ON/OFF This function sets whether to take the open correction value into account when the measure is taken. OPEN CORR: ON Take the open correction value into account. OPEN CORR: OFF Do not take the open correction value into account.

  • Page 57: Load Corr: On/ Off

    ST2684/A Operation Manual Chapter 4 [SETUP] 4.8.3 LOAD CORR: ON/ OFF LOAD CORR: ON Take the open correction value into account. LOAD CORR: OFF Do not take the open correction value into account. Operational steps for switching on or off the load correction function: （1）Move the cursor to LOAD CORR, the following softkeys will be displayed: ■...

  • Page 58: Chapter 5 [System]

    ST2684/A Operation Manual Chapter 5 [SYSTEM] Chapter 5 [SYSTEM] 5.1 <SYSTEM SETUP> Press [SYSTEM], then [SYSTEM SETUP] to enter into the <SYSTEM SETUP> page. Figure 5-1: This page includes LCD contrast, beeper, alarm, language, password, bus mode, bus address, etc. 5.1.1 L CD contrast In this zone, the LCD contrast is controlled and displayed.

  • Page 59: Pass Beeper

    ST2684/A Operation Manual Chapter 5 [SYSTEM] CLASSIC  This softkey is used to set the LCD style to classic display mode. DEFAULT  This softkey is used to set the LCD style to default mode. 5.1.3 Pass beeper Set the pass beep mode. Operational steps for setting the pass beeper: Move the cursor to PASS BEEP, the following softkeys will be displayed: HIGH LONG...

  • Page 60: Language

    ST2684/A Operation Manual Chapter 5 [SYSTEM] 5.1.5 Language This softkey is used to set the language mode. Operational steps for setting the language mode. Move the cursor to LANGUAGE, the following softkeys will be displayed: English  This softkey is used to set the operation language as English. 中文...

  • Page 61: Bus Mode

    ST2684/A Operation Manual Chapter 5 [SYSTEM] 5.1.8 Bus mode Set RS232C interface or GPIB interface as the interface bus. See chapter 8 Remote Control for details. Operational steps for setting the bus mode: Move the cursor to BUS MODE, the following softkeys will be displayed: RS232C ...

  • Page 62: Time

    ST2684/A Operation Manual Chapter 5 [SYSTEM] 5.1.11 Time Set the correct local time. For example: 9 o’clock 13 minute and 25 second a.m. on June 19, 2011 will be shown as 11-06-19 09:13:25. Input the time by numerical keys and press [ENTER] to confirm. Pressing the right and the left arrow keys on the keyboard, the cursor will toggle among different time zones.

  • Page 63: Sta

    If the U disk memory exceeds 512M, it is recommended to use FAT32 standard to format the disk. 3. Before a U disk is connected to ST2684, you are recommended to save the data on it and Sourcetronic GmbH will not be liable for the data loss. 5.2.1 *.STA The instrument can save 20 groups of *.STA file.
  • Page 64 ST2684/A Operation Manual Chapter 5 [SYSTEM]  HV2 fine adjustment voltage  I 1_MAX  I 2_MAX  SPEED  Timer interval   RANGE   R in_L  TRIG  MEASURE DELAY  MEASURE DELAY unit  CHARGE TIME CHARGE TIME unit ...

  • Page 65: Operational Steps For File Manage

    ST2684/A Operation Manual Chapter 5 [SYSTEM] Parameters in <SCAN SETUP>:  SELECTED SEQ.  SCAN START NUM  SCAN END NUM  SCAN RESULT  5.2.2 Operational steps for file manage A. Check the existed file: Press FILE and then FILE MANAGE to enter into the <FILE MANAGE> page. User can switch in “I: (Internal file list)”...
  • Page 66 ST2684/A Operation Manual Chapter 5 [SYSTEM] B. Load the existed file (*.STA) to the instrument: (1) Move the cursor the file to be loaded; (2) When the LOAD softkey is pressed, the instrument will display a prompt information “Are you sure load NO.? (Note: NO.
  • Page 67 ST2684/A Operation Manual Chapter 5 [SYSTEM] In external file list (E:), operation for folder can be taken. A: Enter the subdirectory by the following steps (1) Move the cursor the desired folder; (2) Press the SUB DIR softkey to enter the subdirectory; NOTE: If user wants to save the configuration information or copy the internal configuration information file to E:, it is suggested that above operations are taken in the E:\STA directory.

  • Page 68: Chapter 6 Measurement Procedures And Examples

    Connect the megohmmeter to a two-terminal test fixture by means of two coaxial cables, as shown in the following figure. ST2684A can supply up to 1000V (10 mA) on DUT. ST2684 can supply up to 500V (200 mA) on DUT.
  • Page 69 ST2684/A Operation Manual Chapter 6 Measurement Procedures and Examples Wiring diagram for double-circuit power supply: Figure 6.3.2...

  • Page 70: Insulation Testing Of Capacitors

    ST2684/A Operation Manual Chapter 6 Measurement Procedures and Examples 6.4 Insulation Testing of Capacitors There are some limiting factors to be considered when measuring the Insulation Resistance of High Quality Capacitors. There is a maximum value of obtainable insulation Resistance depending on the capacitance value and the applied test voltage.
  • Page 71 ST2684/A Operation Manual Chapter 6 Measurement Procedures and Examples...

  • Page 72: Charge Resistors For Automated Ir Testing

    6.5 Charge Resistors for Automated IR Testing Scope Automated testing of capacitor insulation resistance (IR) with ST2684/ST2684A IR tester often requires a stepwise charging of the capacitor before the actual resistance measurement. This could be due to the fact that the charging time is longer than the time between measurements or to secondary effects like post charging (“dielectric absorption”)
  • Page 73 10-20 times Rpr1 and Rpr3. The fine charge resistors should match the input resistance Ri of the current input amplifier. In ST2684/ST2684A IR tester, this resistor can be switched to either 10kΩ or 1MΩ. In figure 6.5.1 only two fine charge stations are shown, in many cases more than 10 stations are preferred.
  • Page 74 Wiring and installation in sorting machine When installing the ST2684/ST2684A IR tester and charge resistors in sorting machines, great care should be taken in the wiring. The general rule is to avoid electrical loops that can pick up magnetic noise fields (hum) and add self-inductance.
  • Page 75 ST2684/A Operation Manual Chapter 6 Measurement Procedures and Examples Figure 6.5.2 Wiring of sorting machine The precharge stations are supplied from HV2. The return path of the charge current must be the HV2 return and each precharge station must have its own return wire. In this way it is possible to ensure parallel wiring of the complete path from tester to each precharge station.

  • Page 76: Insulation Resistance Measurement

    Connecting ST2684/ST2684A series Insulation Resistance Tester When connecting the ST2684/ST2684A to the DUT, there are few issues to address to ensure safety, noise free measurement, and minimum disturbance of the surroundings and long term stability of the instrument. The general rule is to avoid electrical loops that can pick up magnetic noise fields (hum) and add self-inductance.
  • Page 77 ST2684/A Operation Manual Chapter 6 Measurement Procedures and Examples or unstable connection can lead to high-current flashes during the (attempted) charging of DUT. The best way to protect against flashovers is to place wire wound resistors as close as possible to the DUT. In this way the transients resulting from the flashovers are damped near the source.
  • Page 78 If larger energies than specified here have to be discharged or if the discharge time must be shortened, it must be done with an external resistor. Range selection of ST2684/ ST2684A: Range 1: 100µA – 1mA; Range 2: 10µA – 100µA;...

  • Page 79: Examples For Sequence Test

    ST2684/A Operation Manual Chapter 6 Measurement Procedures and Examples Range 6: 1nA – 10nA; Range 7: 10pA – 1nA; The correct range is established from measuring the leakage current on several known good and known bad components at the specified voltage and charge/dwell/soak time. The range to choose is the most sensitive range that does not lead to overflow at the upper limit of the leakage current.

  • Page 80: Chapter 7 Test Performance

    7.1.1 Measurement parameters IR test: I.R.（Isolated Resistance）, L.C.（Leakage Current） 7.1.2 General specifications General specifications Model ST2684 ST2684A 10℃ - 40℃, ≤ 90% RH Operating temperature and humidity 90 – 130 V AC(60Hz) or 198 -260V AC(50HZ) Power supply Power consumption...

  • Page 81: Specifications

    ST2684/A Operation Manual Chapter 7 Test Performance 7.1.3 Specifications Resistance test ST2684 ST2684A 10 kΩ– 50TΩ 10 kΩ– 100TΩ Range Accuracy I > 100pA: 2% I ≤ 100 pA: 2% ± Vtest/2pA Current test Range 1: 100µA – 1mA, Internal input impedance 10 kΩ...

  • Page 82: Safety Summary

    ST2684/A Operation Manual Chapter 7 Test Performance 7.2 Safety summary 7.2.1 Insulation resistance (IR) Referring to the working condition, the insulation resistance of the power terminal and the case should not be less than 50MΩ. Under the damp and heat condition, the insulation resistance should not be less than 2 MΩ. 7.2.2 Insulation intension Referring the working condition, the power terminal and the case should load the AC voltage with 50Hz in frequency and 1.5kV in rated voltage for 1 minute, and should have no breakdown and arcing.

  • Page 83: Chapter 8 Remote Control

    Signal ground common As most serial interfaces worldwide, the serial interface of ST2684/ST2684A is also not strictly based on RS-232 standard but only uses the smallest subset of this standard. The signals are listed in the following table. Table 7-2 RS-232 signal and pin number...

  • Page 84: Communicating With Pc

    ST2684/A Operation Manual Chapter 8 Remote Control Note: The definition for serial interface pin used by the instrument is different from that of standard 9 pin connector. RS232C used on this instrument applies 9-pin DB socket, and the sequence of pin is as follows: （side view）...

  • Page 85: Gpib Interface Operation

    ST2684/ST2684A applies IEEE488.2 and the interface plate can be optionally purchased by user. Control command system is open so that user can use the PC operation interface provided by ST2684/ST2684A or take measurements by the control command system. The control command system supports most functions of the instrument, that is to say, user can execute almost all operations on PC.
  • Page 86 ST2684/A Operation Manual Chapter 8 Remote Control exceed 20 meters. A maximum of 15 devices can be connected on one bus system. There are no restrictions on how the cables are connected together. However, it is recommended that no more than four piggyback connectors be stacked together on any one device.

  • Page 87: Gpib Interface Capability

    SRQ, deemed as an interruption, will inform the controller to prepare the transmitted data or that errors exist on the instrument. As soon as ST2684/ST2684A sends a SRQ service request signal, it will set the status byte to 6. 6 bytes are RQS request service bytes and sometimes connects with serial poll to act as the status byte.

  • Page 88: Scpi（Standard Commands For Programmable Instruments

    ST2684/A Operation Manual Chapter 8 Remote Control ） 8.2.5 SCPI（ Standard Commands for Programmable Instruments SCPI is a new general command based on the IEEE488.2-1987 standard. (SCPI is the same as TMSL, a system language for measurement tester adopted by HP.) System for Component X System for Component Y Relative information of the tester...

  • Page 89: Usbcdc Virtual Serial Port

    When “USBCDC” is selected, the USB interface can be configured as a virtual serial port (VCom). 8.4.1 System configuration Connect PC and ST2684/ST2684A to the USB interface through a USB cable. 8.4.2 Install drive The method of installing USBCDC drive is the same as that of USBTMC，but when selecting driving file, select the path of usbVCom.inf，as Figure 0-6.

  • Page 90: Chapter 9 Command Reference

    There are two types of instrument commands: GPIB common commands and SCPI (Standard Commands for Programmable Instruments). GPIB common commands complying with IEEE488.2-1987 standard are applicable to all instruments, but ST2684/ST2684A does not support all common commands. SCPI commands are tree structured. 9.1 GPIB common commands for ST2684 ●*RST...
  • Page 91 ST2684/A Operation Manual Chapter 9 Command Reference Description Power On(PON) Bit User Request(URQ) Bit Command Error(EME) Bit Execution Error(EXE) Bit Device Dependent Error(DDE) Bit Query Error(QYE) Bit Request Control(RQC) Bit Operation Complete(OPC) Bit Query syntax: *ESE? Return format: <value><NL^END> For example: WrtCmd (“*ESE?”); ...

  • Page 92: Command Structure

    ST2684/A Operation Manual Chapter 9 Command Reference Description Operation Status Register Summary Bit RQS(Request Service) Bit Standard Event Status Register Summary Bit MAV(Message Available) Bit Always 0(zero) For example: WrtCmd (“*STB?”);  *OPC is used to set the OPC bit of the event status register when ST2684 has finished the test task. At the same time, this command will notify the instrument that the buffer of the instrument should be set to 1 (decimal: 49).

  • Page 93: Command Syntax

    ST2684/A Operation Manual Chapter 9 Command Reference In figure 7-1, function of the ：AA：BB：EE；FF；GG command is equal to that of the following three commands: ：AA：BB：EE ：AA：BB：FF ：AA：BB：GG 9.3 Command syntax  Common command syntax  Common command is not tree structured so it can be sent to any command level. ...

  • Page 94: Scpi Commands

    ST2684/A Operation Manual Chapter 9 Command Reference 9.5 SCPI commands 9.5.1 System commands ●DISPlay ●MesSETup ●TRIGger ●HTOUtput ●HUMReject ●CCHEck ●MESTb ●MEER ●LIMIt ●Mass MEMory ●UserADJust ●XYGRaph ●SEQSetup ●SeqCONt ●SCANSetup 9.5.2 DISPlay subsystem commands DISPlay subsystem commands are mainly used to set the display page for the instrument. The :DISPlay? query returns the current page.
  • Page 95 ST2684/A Operation Manual Chapter 9 Command Reference LTABle Set the display page to the limit setup. BARSetup Set the display page to the bar graph setup. SSET Set the display page to the sequence setup. SeqCONtent Set the display page to the sequence content. XYSeTup Set the display page to the XY graph setup.

  • Page 96: Msetsetup Subsystem Commands

    ST2684/A Operation Manual Chapter 9 Command Reference Query syntax: DISPlay:MODE? Return format: <font><NL^END> Following fonts are for selection: RESISTANCE CURRENT 9.5.3 MsetSETup subsystem commands MsetSETup :HTVOlt <value> ON (1) OFF(0) :HT2Volt <value> ON (1) OFF (0) :HTMOde ON (1) OFF (0) :HTCUrent :HT2CUrent :SPEEd...
  • Page 97 ST2684/A Operation Manual Chapter 9 Command Reference The :HT2VOlt command sets the voltage of the charge power source in the basic measure page. The :MSET:HT2VOlt? query returns the setup of the current power source. Command syntax: （1） （0） MSET: HT2VOlt OFF <value>...
  • Page 98 ST2684/A Operation Manual Chapter 9 Command Reference SLOW The :AVERage command sets the test average. The :MSET: SPEEd? query returns the current average. Command syntax: MSET: AVERage <value> For example: WrtCmd(“MSET: AVERage 1”); sets the average to 1. Query syntax: MSET: SPEEd? Return format: <...

  • Page 99: Trigger Subsystem Command

    ST2684/A Operation Manual Chapter 9 Command Reference <value> ranges from 0ms to 1000ms. For example: WrtCmd (“MSET: MDELay 1s”); sets the delay time to 1s. Query syntax: MSET: MDELay? Return format: < NR3 ><NL^END> The :CHTIme sets the charge time for single measurement on the measurement page. The :MSET: CHTIme? query returns the current charge time.

  • Page 100: Htoutput Subsystem Commands

    ST2684/A Operation Manual Chapter 9 Command Reference The :MODE command sets the instrument trigger mode. The :TRIGger: MODE? query returns the current trigger mode. Command syntax: CONTinue TRIGger:MODE SINGle For example: WrtCmd (“TRIG:MODE CONT”); set the trigger mode to CONTinue. Query syntax: TRIGger: MODE? Return format: CONTINUE...

  • Page 101: Mestb Subsystem Commands

    ST2684/A Operation Manual Chapter 9 Command Reference 9.5.8 MESTb subsystem commands The :MESTb: query returns the test error status register. Test error status registers are as follows: Figure 8.5.8 Measure overflow Zero adjust aborted HT adjust aborted Contact fail HT error Short circuit error 9.5.9 MEER subsystem commands The :MEER command sets the test error status register.
  • Page 102 ST2684/A Operation Manual Chapter 9 Command Reference Return format: <NR1><NL^END> The :MODE command sets the limit mode for the comparator function. The :LIMIt:MODE? query returns the current limit mode. Command syntax: ATOLerance LIMIt:MODE PTOLerance SEQuence Where, ATOLerance Set the limit mode to ATOLerance. PTOLerance Set the limit mode to PTOLerance.

  • Page 103: Mass Memory Subsystem Commands

    ST2684/A Operation Manual Chapter 9 Command Reference For example: WrtCmd (“LIMIt: PARAM CUR”) Query syntax: LIMIt: PARAM? Return format: CURRENT + <NL^END> RESISTANCE 9.5.11 Mass MEMory subsystem commands Mass MEMory subsystem commands are used to save and load files. Command tree: Mass MEMory :LOAD :STATe <record number>...
  • Page 104 ST2684/A Operation Manual Chapter 9 Command Reference The :OPEN:STATe command sets the open circuit adjustment state. The UserADJust:OPEN:STATe? query returns the current state of open circuit adjust function. Command syntax: UserADJust:OPEN:STATe Where, 1 (49) enables the open circuit adjust function, which is equal to ON. 0 (48) disables the open circuit adjust function, which is equal to OFF.

  • Page 105: Xygraph Subsystem Commands

    ST2684/A Operation Manual Chapter 9 Command Reference The :LOAD:STATe command sets the load adjust state. The UserADJust:LOAD:STATe? query returns the current load adjust state. Command syntax: UserADJust:LOAD:STATe Where, 1 (49) enables the load adjust function, which is equal to ON. 0 (48) disables the load adjust function, which is equal to OFF.

  • Page 106: Seqsetup Subsystem Commands

    ST2684/A Operation Manual Chapter 9 Command Reference Where, TIME means that the X-scale unit is time. VDC means that the X-scale unit is voltage. For example: WrtCmd (“XYGRaph:XSCAle:TIME”) Query syntax: XYGRaph: XSCAle? Return format: TIME + <NL^END> The :TIME command sets the X-scale as time. The XYGRaph: TIME? query returns the current setup value of time.
  • Page 107 ST2684/A Operation Manual Chapter 9 Command Reference DEF3 DEF4 USER1 USER2 USER3 USER4 :DELete USER1 USER2 USER3 USER4 :COPY DEF1 DEF2 DEF3 DEF4 USER1 USER2 USER3 USER4 :PASTe USER1 USER2 USER3 USER4 The :CHIOce command sets the test sequence in the sequence setup page. The XYGRaph: CHIOce? query returns the current test sequence number.
  • Page 108 ST2684/A Operation Manual Chapter 9 Command Reference The : COPY command copies contents in a certain sequence. Command syntax: USER1 USER2 SEQSetup : COPY USER3 USER4 For example: WrtCmd (“SEQSetup : COPY USER1”); sets contents in USER1. The : PASTe command paste contents in the internal memory to a certain sequence. Command syntax: USER1 SEQSetup : PASTe...

  • Page 109: Seqcont Subsystem Commands

    ST2684/A Operation Manual Chapter 9 Command Reference 9.5.15 SeqCONt subsystem commands SeqCONt subsystem commands sets parameters in the sequence content page. SeqCONt :USER1 DELete INTSert <item>,<hv>,<rang>,<avg>,<low>,<upp>,<time> :2 DELete INTSert <item>,<hv>,<rang>,<avg>,<low>,<upp>,<time> … :18 DELete INTSert <item>,<hv>,<rang>,<avg>,<low>,<upp>,<time> :USER2 :1 DELete INTSert <item>,<hv>,<rang>,<avg>,<low>,<upp>,<time> DELete INTSert <item>,<hv>,<rang>,<avg>,<low>,<upp>,<time>...

  • Page 110: Scansetup Subsystem Commands

    <value> <value> <value> <value> ST2684 ：10V --- 500V Range of HV: ST2684A： 10V --- 1000V 1 – 8 (See specific details listed below.) Range of RANG: Range of AVG: 1 - 100 1pA – 1mA, 100kΩ - 1PΩ Range of LOW: 1pA –...

  • Page 111: Barsetup Subsystem Commands

    ST2684/A Operation Manual Chapter 9 Command Reference Command syntax: DEF1 DEF2 DEF3 DEF4 SCANSetup: CHIOce USER1 USER2 USER3 USER4 For example: WrtCmd (“SCANSetup: CHIOce USER1”), set USER1 as the sequence number. Query syntax: SCANSetup: CHIOce? Return format: DEF1 DEF2 DEF3 DEF4 USER1 + <NL^END>...

  • Page 112: Fetch? Subsystem Commands

    ST2684/A Operation Manual Chapter 9 Command Reference The : BarSCAle command sets the bar scale of the bar graph display page. The BARSetup: BarSCAle? query returns the current bar scale. Command syntax: : BarSCAle <NR1> ——————————————————————————————————————— NOTE: In CUR mode, <NR1> ranges from 0 to 8. In RES mode, <NR1>...

  • Page 113: Chapter 10 Handler Interface

    ST2684/A Operation Manual Chapter 10 Handler Interface Chapter 10 Handler Interface For the instrument, HANDLER interface is used to control external trigger and to output BIN signals in accordance with limit setup. The HANDLER interface is used for external triggering of the instrument and to output BIN signals in accordance with predefined limits.

  • Page 114: Electrical Characteristics

    ST2684/A Operation Manual Chapter 10 Handler Interface /BIN5 /EXT.TRIG External trigger: In EXT.TRIG mode, ST2684 is triggered by rising edge impulse signals applied on the pin. Voltage control: In EXT.TRIG mode, ST2684 is triggered by rising edge impulse /PBREAK signals applied on the pin. It is used to enable or disable the voltage.

  • Page 115: Bin Signals

    ST2684/A Operation Manual Chapter 10 Handler Interface 10.3 BIN signals 10.3.1 BIN signals in the test display page. Figure 9.3 Layout of BIN signals Above figure shows the layout of BIN signals that is in accordance with limit setup. If the test value is larger than LIM1 and less than LIM2, the BIN2 signal will be activated (the output optocoupler will be switched on).

  • Page 116: Bin Signals In The Sequence Display Page

    ST2684/A Operation Manual Chapter 10 Handler Interface 10.3.2 BIN signals in the sequence display page PASS BIN5 LOW FAIL BIN0 HIGH FAIL BIN4 10.4 Examples for HANDLER input/ output Figure 9.4 Example for the circuit Figure 9.4 shows an example of a setup that can be used to perform flash test and /or IR test. In both cases, the BIN0 is set if there is a flash over or if the insulation resistance is too low.

  • Page 117: Chapter 11 Package Contents And Warranty

    11.2 Warranty This Sourcetronic GmbH instrument product is warranted against defects in material and workmanship for a period of two years from the date of shipment. You should supply us with the warranty card before you enjoy the free maintenance service.
  • Page 118 SOURCETRONIC GMBH Fahrenheitstrasse 1 28359 Bremen Germany T +49 421 2 77 99 99 F +49 421 2 77 99 98 info@sourcetronic.com www.sourcetronic.com skype: sourcetronic www.sourcetronic.com...

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