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TEL: (516) 334-5959 • (800) 899-8438 • FAX: (516) 334-5988

www.ietlabs.com

IET LABS, INC.

534 Main Street, Westbury, NY 11590

Standards

•

Decades

•

Strobes

•

Sound Level Meters

•

Bridges

LOM-4000 SERIES

Digital Ohmmeter

User and Service Manual

♦

PRECISION INSTRUMENTS FOR TEST AND MEASUREMENT

♦

LOM-4000 im February, 2005

Содержание LOM-4000

Страница 1: ...om IET LABS INC 534 Main Street Westbury NY 11590 Standards Decades Strobes Sound Level Meters Bridges LOM 4000 SERIES Digital Ohmmeter User and Service Manual PRECISION INSTRUMENTS FOR TEST AND MEASU...

Страница 2: ......

Страница 3: ...at no charge when returned to IET Changes in this product not approved by IET or application of voltages or currents greater than those allowed by the specifications shall void this warranty IET shal...

Страница 4: ...ARE USED TAKE ALL MEASURES TO AVOID ACCIDENTAL CONTACT WITH ANY LIVE COMPONENTS USE MAXIMUM INSULATION AND MINIMIZE THE USE OF BARE CONDUCTORS WHEN USING THIS INSTRUMENT Use extreme caution when worki...

Страница 5: ...nts 5 3 4 1 Ohmmeter Connections 5 3 4 2 Start up 6 3 4 3 Measurement 6 3 4 4 Current Mode 7 3 4 5 Over Range 7 3 4 6 Open Circuit Lead 8 3 4 7 Low Battery 8 3 4 8 Connections 8 3 5 Protection 8 3 6 T...

Страница 6: ...re 3 2 Combined current and potential probes Kelvin clips 6 Figure 3 3 Connections for resistance measurements with various DUT configurations 7 Figure 3 4 Connection Diagram for Pt100 plug viewed fro...

Страница 7: ...themea surement of resistance in the range 10 to 4000 They utilize the four terminal Kelvin resistance mea surement method to eliminate the effects of lead re sistance The measured values are displaye...

Страница 8: ...pproximately 20 ms for normal measurement 40 ms for average AVE mode Polarity Selectable positive or negative current flow by manually reversing test leads plus an average mode which automatically dis...

Страница 9: ...3 Operation LOM 4000 Series Chapter 3 OPERATION Low Battery LED Units Indication 4000 Function Keys Display Value LED 4001 only Calibration Display Mode LED s 4001 only...

Страница 10: ...LOM 4000 Series 4 Operation 0 0...

Страница 11: ...unit for shipping damage and report any problem immediately to the carrier retain ing packaging materials for inspection 3 2 Safety This unit has been designed and tested in accordance with IEC Standa...

Страница 12: ...ic zero sequence and finally sets to the 4 k range The unit is now ready to make mea surements The unit will shut off automatically after several minutes of inactivity If the internal checks indicate...

Страница 13: ...d for measurements that are not in ductive in order to eliminate errors caused by ther malemfin themeasurementcircuitortestleads In the AVE mode the LOM D4000 1 takes readings with the current flowing...

Страница 14: ...e volt age Measurements cannot be made if this warning message is displayed This warning will also be dis played if the current lead resistance is high 3 4 7 Low Battery The LOBAT LED will light when...

Страница 15: ...ill show CODE for a few seconds and the 0000 with a flashing cursor under the first zero Enter the calibration code 9252 using the UP and DOWN keys to select the digits and the ZERO and AVE keys with...

Страница 16: ...ndard connected to the instrument using the shorting clip supplied with the standard or a heavy wire All four leads between the instrument and the standard should remain connected Remove the short aft...

Страница 17: ...n RMA number before return ing the unit directly to IET CAUTION Replace only with the correct fuse type shown below The input circuits are protected by a 1 A fuse located in a holder on the printed ci...