Cropico 4000 Hand-Held Digital Ohmmeter

Hand-held Digital Milliohmmeter Series 4000

This portable Digital Ohmmeter is a practical instrument for low resistance measurement, ideal for use in the workshop, field or test facilities. It is of rugged construction contained in an sturdy Plastic case. The Series 4000 has many advanced features, including Auto ranging, forward and reverse current measurement with auto average, True current zero, protection up to 415 volts rms, digital calibration and long scale length, 4000 count and auto power down to maximise battery life.

The model 4001 also includes temperature compensation, with preset coefficients for copper and aluminium plus user settable coefficients for other materials. Temperature measurement over the range -50...+800 deg. C is also available.

LS06 Standard Lead Set supplied with the 4000 series

The test leads provided have a length of 1 metre with spade tags for connection to the ohmmeter terminals. They are terminated in combined current and potential probes that will accept conductor diameters up to 6mm.

The rechargeable battery option includes a battery pack, docking station and charger.

For ease of operation the control functions have been kept to a minimum and are clearly marked. It is of course direct reading, warning LEDs illuminate when an open circuit lead condition is detected. Over range and low battery indication is also provided.

The Series 4000 milliohmmeters are supplied ready for immediate use with batteries and measuring leads, no extras are normally necessary. To further enhance its performance a full range of test test leads are available as well as rechargeable battery pack, temperature probes and carrying case.

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Key Features

True 4 wire measurement eliminates lead resistance errors
6 ranges 40 milliohms to 4 kilohms, long scale length 4000 count
Automatic or manual range selection
Input protection up to 415 Volts rms
Resolution 10 microhms on 40 milliohm range
Forward and reverse current measurement with auto average
True current Zero
Temperature compensation Model 4001
Temperature Measurement -50...+800 Deg.C Model 4001

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Cropico 4000 series Digital Ohmmeter

Technical Specification

Measurement	4 Terminal Kelvin/Thomson principle eliminates error due to lead resistance. Open circuit measurement voltage approx. 5V dc.
Display	15mm LCD 4000 count with automatic decimal point and polarity indication.
Ranges	6 Ranges with automatic or manual selection
Auto Zero	Permits the automatic zero of amplifiers and external circuits eliminating errors due to thermal emf.
Calibration	Digital
Protection	415 rms maximum at input terminals.
Battery	5 AA size manganese Alkaline supplied with unit. Rechargeable battery pack option includes 5 AA size Ni/Mhd, housed in removable cassette plus docking station and charger. Automatic Power OFF ensures maximum battery life
Temperature Compensation (Model 4001)	The model 4001 also includes temperature compensation which references the measurement to an ambient temperature of 20 Deg.C. Coefficients for copper and aluminium are pre programmed and a user coefficient facility enables coefficients for any material to be entered.
Temperature Measurement (Model 4001)	The Model 4001 also include temperature measurement over the range -50...+800 Deg C. Using a Pt100 temperature probe which may be ordered as an option.
Terminals	4mm safety sockets
Working Temp	0...40°C rel. humidity 80% max. non-condensing.
Storage Temp	-20 ... +50°C.
Charger Mains Supply	100/120/220/240 Volts +10% -13%. 47 ... 63Hz. 20VA
Safety	EN61010-1 EMC - EN61326
Dimensions	215 x 130 x 55 mm (W H D)
Weight	1.76 lbs.
Accessories	Supplied complete w/ batteries, measuring leads with Kelvin Clips, handbook, and calibration certificate.

Range	Resolution	Typical Current	Accuracy @ 20°C ±5°C 1 year	Temperature Coefficient/°C
4kΩ	1Ω	100μA	±(0.05% Rdg +0.02% FS)	30ppm Rdg + 1ppm FS
400Ω	100mΩ	1mA	± (0.05% Rdg +0.02% FS)	30ppm Rdg + 1ppm FS
40Ω	10mΩ	10mA	± (0.05% Rdg +0.02% FS)	30ppm Rdg + 1ppm FS
4Ω	1mΩ	10mA	± (0.05% Rdg +0.03% FS)	30ppm Rdg + 4ppm FS
400mΩ	100μΩ	10mA	± (0.05% Rdg +0.05% FS)	30ppm Rdg + 25ppm FS
40mΩ	10μΩ	100mA	± (0.05% Rdg +0.1% FS)	30ppm Rdg + 25ppm FS

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