Laboratory manual for the evaluation of non-automatic weighing devices

LG-3.16 Damp heat, steady state

Table of contents


Reference

Sections 9, 10, 11 and 29 of the Specifications Relating to Non Automatic Weighing Devices (1998)

Application

This test is intended for any complete electronic weighing devices, and for any electronic weighing elements or electronic indicating elements tested separately. The test consists of exposure of the DUT to a constant temperature and constant relative humidity.

Note: The damp heat steady state test is not presently performed by the Laboratory. MC intends to implement this test in the future.

Settings

Procedure

At ≈20°C/50% RH

  1. Condition the device. Record the temperature and humidity rate.
  2. Perform a minimum of three increasing and decreasing load test and record the results.

At 40°C/85% RH

  1. Increase the temperature of the chamber and raise the humidity rate.
  2. Condition the device.
  3. When the device has reached temperature and humidity stability, allow for 48 hours. The temperature and humidity rate must remain constant.
  4. Then perform a minimum of three increasing and decreasing load tests. Record the results.

At 20°C/50% RH

  1. Condition the device. Record the temperature and humidity rate.
  2. Perform a minimum of three increasing and decreasing load test and record the results.

Interpretation of results

The device meets the requirements if under the above conditions it performs within applicable limits of error.

For more details concerning the procedure, see OIML R 76-1.

Revision

Rev. 1 (March 2010)
  • AZSM renamed to AZTM
  • formatting change
Date modified: