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Introduction 

 

Page 9 of 28 

 

Section 1: Introduction 

 
1.1 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 1

A to 1A.  A basic measurement accuracy of 0.05% 

coupled with a fast measurement speed of 5meas/sec and built-in comparator for 
Go/NoGo testing makes the unit ideal for fast and precise testing in a production 
environment. 
 
A handler interface and optional IEEE-488 interface are also available to adapt the 
instrument for production and automatic system applications. 
 
The instrument is supplied in a bench configuration, i.e., in a cabinet with resilient feet 
for placement on a table.  A bail is provided under the front edge so that the instrument 
can be tilted back for convenient operator viewing. 
 

QuadTech

TEST

POWER

REMOTE

123.45

ZERO

INT

TRIGGER

MAN/EXT

DOWN

RANGE

AUTO

%

UP

SPEED

FAST

DISPLAY

SLOW

VALUE

LIMIT SET

ENABLE

FAIL LO

FAIL HI

PASS

NOMINAL VALUE

1880 MILLIOHMMETER

HIGH LIMIT(+)%

LOW LIMIT(-)%

TEST SETUP

0 5 0 

0 2 0 

1 0 0 0 0 

ON

OFF

m

k

M

 

 
 

Figure 1-1: 1880 Milliohmmeter 

Содержание 1880-00

Страница 1: ...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...

Страница 2: ...Page 2 of 28...

Страница 3: ...Selection 18 2 7 Measurement Speed Selection 19 2 8 Display Selection 19 2 9 Limit Setting 19 2 9 1 General 19 2 9 2 Setting Nominal Value 19 2 9 3 Setting 20 2 9 4 Enabling Pass Fail Limits 20 2 10...

Страница 4: ...Page 4 of 28...

Страница 5: ...acility Changes in the Product not approved by QuadTech shall void this warranty QuadTech shall not be liable for any indirect special or consequential damages even if notice has been given of the pos...

Страница 6: ...Page 6 of 28...

Страница 7: ...1 A 4 5V Accuracy specified at 18 C 28 C Temperature Coefficient 0 C 18 C and 28 C 50 C 0 25 x accuracy C Measure Rate 2 5 or 5 measurements sec Limit Detection High Low value comparator Value and fr...

Страница 8: ...1 Meter Cable Set Accessories 1880 01 IEEE Interface factory installed Available 1880 50 Cable Set 1 meter included standard 1880 51 Cable Connector 1880 52 Test Fixture and Cable 1880 70 IEEE Interf...

Страница 9: ...al for fast and precise testing in a production environment A handler interface and optional IEEE 488 interface are also available to adapt the instrument for production and automatic system applicati...

Страница 10: ...inal Kelvin Connection to DUT 3 DOWN Black P B Switch Count down through 9 measurement ranges in Manual Mode 4 ZERO Black P B Switch with red LED Initiates test lead or fixture error correction when l...

Страница 11: ...ch Set Nominal Value Decimal 12 ENABLE Black P B Switch with red LED Enable Limit Function when LED is lit 13 FAIL HI Red LED When lit measured value exceeds High Limit 14 PASS Green LED When lit meas...

Страница 12: ...Use by Qualified Service Personnel ONLY Improper use will alter instrument calibration Enable Disable Calibration function 3 ALARM SIGNAL Audible output activated for Pass Fail 4 ALARM VOLUME Silver...

Страница 13: ...E 488 interface 10 IEEE 488 Blue 24 pin connector I O connection for IEEE 488 interface 1 3 Accessories Included Table 1 3 Accessories Included Item Quantity Instruction Manual 1 Calibration Certifica...

Страница 14: ...e Always use an outlet that has a properly connected protection ground To Change A Fuse WARNING MAKE SURE THE UNIT HAS BEEN DISCONNECTED FROM ITS AC POWER SOURCE FOR AT LEAST 5 MINUTES BEFORE PROCEEDI...

Страница 15: ...conditions RANGE AUTO Red light on TRIGGER INT Internal with red light on DISPLAY VALUE SPEED SLOW 2 5 measurements sec LIMIT SET ENABLE off Red light off Since the instrument defaults to internal tri...

Страница 16: ...ld be symmetrically positioned with the incoming cables on the same side Cable Cable Red Black P I P I Right Way Cable Cable Black Red P P I I Wrong Way Figure 2 1 Test Lead Positioning for Zeroing Ke...

Страница 17: ...0 Test Lead Clips Figure 2 2 Device Under Test Pin Function 1 P 2 I 3 Guard 4 I 5 P 1 2 3 4 5 Figure 2 3 TEST Connector Configuration 2 4 Measurement Procedure Once the instrument has been powered up...

Страница 18: ...e Table 2 1 Measurement Ranges Full Scale Full Scale Range 20m 200m 2 20 200 2k 20k 200k 2M Resolution 1u 10u 100u 1m 10m 100m 1 10 100 To return from a manual range setting to autoranging press the R...

Страница 19: ...ON or indicator lamp ON LIMIT SET must be enabled to select a display of Refer to paragraph 2 9 for setting a nominal value and limits 2 9 Limit Setting 2 9 1 General The limits are set using the thum...

Страница 20: ...etween the two limits The status of the audible pass fail alarm is dependent on the rear panel setting i e it can be set to sound on a pass or a fail refer to paragraph 2 10 To enable the limit compar...

Страница 21: ...value is lower than LOW LIMIT 2 FAIL HI Measured value is higher than HIGH LIMIT 3 PASS Measured value within limits 4 EOT End of Test 5 EXT TRIG External Trigger Input low level 6 5 VCC 5 Volt DC su...

Страница 22: ...he identifications below SH1 Source Handshake PP0 Parallel Poll AH1 Acceptor Handshake DC1 Device Clear T8 Talker DT0 Device Trigger L4 Listener C0 Controller SR0 Service Request E1 Electrical Interfa...

Страница 23: ...defaults to auto ranging R0 on power up or on any device clear command DCL The Set commands duplicate front panel test conditions listed below The instrument defaults to slow S0 comparator off S3 dis...

Страница 24: ...r ranges when test lead zeroing is enabled Table 2 4 Output Data Format Range Measurement Results Resistance R Value Resistance Over Indication R1 R m R 999999 m R2 R m R 999999 m R3 R R 999999 R4 R R...

Страница 25: ...PRINT R 380 FOR I 1 TO 8 390 SET G CALL IBWRT DEV3 SET 400 CALL IBRD DEV3 R 410 PRINT I R 420 NEXT I 430 END 2 12 Operation with 1880 52 Test Fixture Cable The 1880 52 Test Fixture Cable provides a me...

Страница 26: ...wire Instrument zeroing should be performed once the test fixture is connected For information refer to paragraph 2 2 on Instrument Zeroing The fixture contacts should be shorted with bus wire the lar...

Страница 27: ...QuadTech for service please call our Customer Care Center CCC at 800 253 1230 for return material authorization RMA It will be necessary to include a Purchase Order Number to insure expedient processi...

Страница 28: ...ed 11 11 CALIBRATION switch on rear panel may be ON 22 22 Internal EEPROM read write error initialize instrument with power up Service may be required 33 33 A D converter failure service required C LO...

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