Jandel Test Units

Jandel Engineering Limited manufacture two Test Units designed specifically for four point probe measurements.
Please find descriptions below of the RM3000 Test Meter and the HM21 portable Test Meter.

Jandel RM3000 Test Unit

The Jandel RM3000 Test Unit is a constant current source and digital voltmeter, supplying constant currents between 10nA and 99.99mA, and measuring voltages from 0.01mV to 1250mV.

The RM3000 has a range of 1 milliohm/square to 500 Megohms/square, or 1 milliohm.cm to 1 Megohm.cm. Measurements outside this range are possible depending on sample type and possible reduced accuracy.

Readings can be displayed as voltage or alternatively direct display of Ohms/square or ohm.cm.

RM3000 data sheet

Jandel ResTest Test Unit

The new Jandel ResTest Test Unit is a constant current source and digital voltmeter with large colour screen, supplying constant currents between 1uA and 10mA, and measuring voltages from 0.04mV to 4000mV.

The ResTest has a range of 10 milliohm/square to 1 Megohms/square, or 10 milliohm.cm to 10000 ohm.cm. Measurements outside this range are possible depending on sample type and possible reduced accuracy.

Readings are displayed directly in mV, Sheet resistance and Volume Resistivity and can be saved on board or directly to memory stick.

ResTest data sheet

Jandel HM21 Test Unit

The Jandel HM21 Test Unit has six constant current settings between 100nA and 10mA, and can be used to measure voltages from 0.01mV to 1250mV.

The measurement range of the HM21 is 1 ohm/square to 10 Mohm/square or 10 mohm.cm to 10 Kohm.cm. Measurements outside this range depend on sample type and possible reduced accuracy.

Measurements can be displayed as mV values or directly in ohms/square values.

HM21 data sheet