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QuadTech, Inc. 1880-00 Instruction Manual

Milliohmmeter
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®
Advanced Test Equipment Rentals
www.atecorp.com 800-404-ATEC (2832)
The material in this manual is for informational purposes only and is subject to change, without
notice. QuadTech assumes no responsibility for any error or for consequential damages that may
result from the misinterpretation of any procedures in this publication.
Potentially dangerous voltages may be present on front and rear panel terminals. Follow all
warnings in this manual when operating or servicing this instrument. Dangerous levels of energy
may be stored in capacitive devices tested by this unit. Always make sure the high voltage
indicator is not on when connecting or disconnecting the device under test.
!
Product will be marked with this symbol (ISO#3684) when it is necessary for the user to
refer to the instruction manual in order to prevent injury or equipment damage.
Product marked with this symbol (IEC417) indicates presence of direct current.
Product will be marked with this symbol (ISO#3684) when voltages in excess of 1000V
are present.
QuadTech, Inc., 1993
5 Clock Tower Place, 210 East
Maynard, Massachusetts, U.S.A. 01754
October 2000
Telephone
978-461-2100
Sales
800-253-1230
Facsimile
978-461-4295
Website
www.quadtech.com
WARNING
1880
Milliohmmeter
Instruction Manual
Form 150046/A2

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  • Page 1 ® Advanced Test Equipment Rentals www.atecorp.com 800-404-ATEC (2832) 1880 Milliohmmeter Instruction Manual Form 150046/A2 QuadTech, Inc., 1993 5 Clock Tower Place, 210 East Maynard, Massachusetts, U.S.A. 01754 October 2000 Telephone 978-461-2100 Sales 800-253-1230 Facsimile 978-461-4295 Website www.quadtech.com The material in this manual is for informational purposes only and is subject to change, without notice.
  • Page 2 Page 2 of 28...

  • Page 3: Table Of Contents

    Contents Warranty ......................5 Specifications ......................7 Introduction - Section 1 Product Overview..................9 Controls and Indicators ................. 10 Accessories Included..................13 Accessories/Options Available ..............13 Power Requirements ..................14 Operation - Section 2 Startup ...
  • Page 4 Page 4 of 28...

  • Page 5: Warranty

    Warranty uadT QuadTech warrants that Products are free from defects in material and workmanship and, when properly used, will perform in accordance with QuadTech's applicable published specifications. If within one (1) year after original shipment it is found not to meet this standard, it will be repaired, or at the option of QuadTech, replaced at no charge when returned to a QuadTech service facility.
  • Page 6 Page 6 of 28...

  • Page 7: Specifications

    Specifications Resistance Range F.S. Resolution Accuracy* TEST CLAMP (0.1% + 1ct) 20m 1.0V (0.05% + 1ct) 200m 10 100mA 1.0V (0.05% + 1ct) 100 100mA 1.0V (0.05% + 1ct) 10mA 1.0V (0.05% + 1ct) 200 10m 4.5V (0.05% + 1ct) 100m 100A 4.5V...
  • Page 8 1880-51 Cable Connector 1880-52 Test Fixture and Cable 1880-70 IEEE Interface (field retrofit) Ordering Information: Description Catalog Number 1880 Milliohmmeter 1880-00 1880-50 Kelvin Clip Lead Set Figure S-1: 1880-50 Cable Lead Set 1880-52 4-BNC to Axial/Radial Adaptor Figure S-2: 1880-52 Lead Set...

  • Page 9: Product Overview

    Section 1: Introduction Product Overview The 1880 Milliohmmeter is ideally suited for a wide variety of low-ohm resistance measurements of switches, relays, connector contacts, printed circuit board tracks and other resistive items. The instrument offers nine measurement ranges from 2M to 1 over seven current ranges from 1A to 1A.

  • Page 10: Controls And Indicators

    Controls and Indicators Figure 1-2 illustrates the controls and indicators on the front panel of the 1880 Milliohmmeter. Table 1-1 identifies them with description and function. 1 7 1 6 1 5 1 4 1880 uadTech T E S T S E T U P LIMIT SET MILLIOHMMETER V A L U E...
  • Page 11 Table 1-1: Front Panel Controls and Indicators (Continued) Reference # Name Type Function Figure 1-2 Black P-B Switch Count up through 9 measurement ranges in Manual Mode MAN/EXT Black P-B Switch with Manual measurement red LED trigger when LED is lit 3-digit Thumb Wheel Set Low Limit value in % LIMIT...
  • Page 12 Figure 1-3 illustrates the controls and connectors on the rear panel of the 1880 Milliohmmeter. Table 1-2 identifies them with description and function. A D D R E S S I E E E 4 8 8 I N T E R F A C E QuadTech O N 1 A L A R M...

  • Page 13: Accessories Included

    Table 1-2: Rear Panel Connectors (Continued) Reference # Name Type Function Figure 1-3 FUSE Black screw cap AC input power fuse: 0.25A for 115V use 0.125A for 230V use AC LINE INPUT Black 3-prong 3-wire connection for receptacle AC power source No Name Black Hole Audible output for...

  • Page 14: Power Requirements

    Power Requirements The 1880 Milliohmmeter can be operated from either a 115V or 230V power line source. Power connection is via the rear panel through a standard AC 3-wire receptacle. Before connecting the 3-wire power cord between the unit and AC power source make sure the voltage selection switch on the rear panel and the fuse are in accordance with the power source being used.

  • Page 15: Startup

    Section 2: Operation Startup Check to make sure the line voltage marking on the rear panel agrees with the AC power source available (Switch position to the left for 115V and to the right for 230V). Connect the instrument power cord to the source of proper voltage. The instrument is to be used only with three-wire grounded outlets.
  • Page 16 Proceed as follows for automatic zeroing: Plug the cable set (or other lead set/fixture) into the front panel TEST connector. Short the two clips of the 1880 test leads (or other lead set/fixture) together. The P+, P- should be shorted directly together and I+, I- shorted together. When using the 1880 Cable Set, Figure 2-1 shows how the leads should be positioned to accomplish this, i.e.

  • Page 17: Connection To Device Under Test

    Connection to Device Under Test Figure 2-2 below shows a typical four-terminal Kelvin connection to the device under test using the 1880 Test Lead Set that plugs into the front panel TEST connector. DEVICE UNDER TEST 1880 Test Lead Clips 1880 Test Lead Clips Figure 2-2: Device Under Test Pin #...

  • Page 18: Measurement Range Selection

    Measurement Range Selection For normal operation the 1880 RANGE should remain in AUTO (red light ON). This will eliminate the potential for incorrect settings of the measurement range. In cases where manual range selection is desired proceed as follows. Press [RANGE UP] or [DOWN] button to set range manually (Auto red light OFF).

  • Page 19: Measurement Speed Selection

    Measurement Speed Selection There are two user selectable measurement speeds available on the 1880, these being FAST (5meas/sec) and SLOW (2.5meas/sec). Slow is the default mode of the instrument at power-up. To change the speed proceed as follows: Press [SPEED] to select either FAST (indicator lamp ON) or SLOW (indicator lamp ON).

  • Page 20: Setting

    2.9.3 Setting % The low and high limits (from entered nominal) are set using individual thumb-wheel switches. The limits must be entered in % only using three digits each. A limit can be entered to 1/10% i.e. an entry of 105 would be 10.5%. Note that the decimal point is shown on the panel below each thumb-wheel switch.

  • Page 21: Input/Output Interface21

    2.11 Input/Output Interface 2.11.1 Handler Interface The 1880 instrument includes as standard a handler interface port for connection to a component sorter. Connection is via a 9-pin DB9 connector located on the rear panel. Refer to Table 2-2 for pin numbers and functional description. Table 2-2: Handler Interface Functions Pin # Name Description...

  • Page 22: Ieee-488 Interface Option

    2.11.2 IEEE-488 Interface Option The IEEE-488 interface is available as an option to the 1880. When this option is present connection is made through a connector (24 pin) on the rear panel. This interface can be used to connect to a system containing a number of instruments and a controller which meets the IEEE-488 Standard.

  • Page 23: Ieee-488 Commands

    2.11.4 IEEE-488 Commands Device commands are used to tell the 1880 how to set up and when to make a measurement. The device commands must be sent over the IEEE bus from the controller when the 1880 unit is addressed as a listener. The device commands are listed in Table 2- 3 below and must be entered using upper-case letters only.

  • Page 24: Output Data Format

    2.11.5 Output Data Format Output data is in floating point format as illustrated in Table 2-4 below. A data string is preceded by R if display is resistance value and P if display is % deviation. NOTE A negative value is possible on the lowest range or ranges when test lead zeroing is enabled.

  • Page 25: Sample Program For Ieee-488

    2.11.6 Sample Program for IEEE-488 '******** INITIALIZE 1880 ********************** ADAP$="GPIB0" : DEV3$="Dev3" : R$ = SPACE$(16) CALL IBFIND (DEV3$,DEV3%) CLS '**** MEASURE AND DISPLAY DATA ************* SET$="S1:": CALL IBWRT (DEV3%,SET$) 'Fast SET$="S3:": CALL IBWRT (DEV3%,SET$) 'Comp. Off SET$="S4:": CALL IBWRT (DEV3%,SET$) 'Display R SET$="S7:": CALL IBWRT (DEV3%,SET$) 'Ext.
  • Page 26 1880-52 4-BNC to Axial/Radial Adaptor Figure 2-8: Fixture & Cable Connection If the device under test (DUT) is a radial lead component it can be inserted directly into the fixture slots. The slots accommodate wires with diameters from 0.25mm to 1mm (AWG 30 to AWG 18 wire).

  • Page 27: Service & Calibration - Section

    Section 3: Service & Calibration General Our warranty (at the front of the manual) attests the quality of materials and workmanship in our products. If malfunction should be suspected, or other information desired, applications engineers are available for technical assistance. Application assistance is available in the U.S.

  • Page 28: Error Messages

    Error Messages The following messages/error messages are possible on the instrument display. Message Description "UUUUU" Measurement over-range "00-00" Internal RAM read/write error, initialize instrument with power-up. Service may be required. "11-11" CALIBRATION switch on rear panel may be ON. "22-22" Internal EEPROM read/write error, initialize instrument with power-up.

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1880

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