DranTech PMIT (DranTech PMIT, leads, case)

DranTech PMIT Precision Milliohm Insulation Resistance Tester Digital Multimeter and Data Logger

Applications

The DranTech PMIT is a compact, rugged and reliable instrument, which is equally suitable for precision measuring and recording tasks in the factory, for field service and in the laboratory:

• Adjustment of shunts in instrumentation
• Testing of electrical connections at conductor bars for open pit mining, in potential bonding systems, and for industrial and household applications
• Testing of cable resistance, wiring, shunt resistors in PCBs and thick-film circuits
• Measurement of contact resistance in relays, switches and power interrupters
• Testing of resistance in fuses, as well as conductor resistance in heavy current circuits
• Testing of winding resistance in transformers, coils, small motors etc.
• Testing of discharge resistance on aircraft, and at aircraft outer skin components
• Contact resistance testing in uninterruptible power supplies
• Measurement of cell voltages, for example in onboard batteries and emergency power supplies
• Contact resistance testing at welding seams

Features

 The PMIT is a compact milliohm resistance meter plus multimeter and thermometer for the measurement of low-value contact resistance on aircraft outer skins (lightning protection, wick test), and for general low-resistance measurements. It is also used for service and repair work performed on airplane and helicopter electrical systems (voltage, insulation, milliohm and temperature measurement).

In addition to its Digital Multimeter functions for electrical quantities, the instrument also includes a mega-ohm measuring function with insulation test voltages of 50, 100, 250 and 500 V, as well as temperature measurement with Pt100 and Pt1000 sensors.

Milliohm Resistance

The PMIT milliohm resistance meters are the modern alternative for the well known TH2 (Thomson) and Wh2 (Wheatstone) measuring bridges. They provide an expanded measuring range, greater accuracy and easier reading. As universal measuring and test instruments, they acquire and record values to an integrated memory module including resistance in the milliohm and micro-ohm ranges, as well as “normal multimeter resistance values” in the ohm to megaohm ranges by feeding a measuring current to the resistor, conductor or device under test DUT. The respective measuring current is determined by the rotary selector switch setting and lies within a range of 1 to 0.02 A in the milliohm ranges. The instrument also measures and records insulation resistance with test voltage selectable in steps, for example in order to test resistance in on-board electrical systems for aircraft, ocean vessels, etc., and for testing overvoltage arresters and much more.

Easy Operation

Operation is very easy. Simply connect the lowresistance device under test to the instrument with the included measurement cables, Kelvin clips or 4-wire probes (KC27), and select the proper measuring range.

Integrated Measured Value Memory and Interface

Each PMIT is equipped with a measured value memory module and can thus be utilized as a data logger or a recording instrument for all measuring functions. Measurement results can be transmitted to a PC either off-line via the optical interface which is furnished as standard equipment, or online with an optional bidirectional adapter. In this way, for example, characteristic voltage and temperature curves can be displayed and analyzed in chart recorder format relative to real-time, or individual measured values, e.g. voltages for each of the cells in a storage battery, can be saved with the DATA Hold function and analyzed at a PC in tabular form using the optional DranWin 10 software.

Offset Balancing

Automatic offset balancing is provided for the lower measuring ranges.

Protection Against Operator Error

The PMIT is protected by special circuitry against accidental short-term connection to devices under test with fault voltages of up to 600 V.

Test Functions and Automatic Functions

All instruments are equipped with diode and continuity test functions, as well as automatic and manual measuring range selection and automatic shut-off.

Protective Rubber Holster for Harsh Conditions

The device features a very compact, rugged design. In addition it is protected against damage in the event of impacts or dropping with a protective rubber holster that also serves as a tilt stand. The rubber material also prevents sliding if it is used on a vibrating surface.