PL Engineering Ltd Z-Meter DX4091/ User Guide
page 12 of 44 ver.1.02 (2022)
2.4. Design overview
The Z-Meter is a single-channel device with internal chamber for
placement of test frame with mounted pellet sample. Chamber’s
cover is magnetically locked when closed or opened.
The internal chamber is a passive thermostat which provides
constant temperature during measurements. Temperature inside the
chamber is measured by integrated temperature sensor.
Spot heater inside the chamber is placed for measurement of pellet
conductivity type.
There are also LEDs for visual control of measurements status.
Cable with USB connector for communication with PC.
2.5. Features
- The device provides measurement of performance parameters:
pellet resistance R, electric conductivity
and Figure-of-Merit Z.
- Measured Figure-of-Merit (Z) allows calculation of cooling
performance of TE modules (ΔT
max
) to be made with use of such
pellets.
- Resistance (R) of the pellet also allows calculating resistance of
TE module (ACR) to be made with use of such pellets with
known number (N) of pellets (ACR≈N x R).
- The Z-Meter allows checking of type of pellets conductivity (n-
type or p-type).
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