Temperatures
This menu gives access to three temperature parameters, an oven stable indication, an ashing moisture rate control parameter, and an enable switch used during a test.
Test Temperature - The current temperature setpoint is displayed to the right of TEST TEMPERATURE. Press [ENT] and the cursor will be positioned at the left most significant digit. Use the number keys to enter the desired test temperature. When finished, press [ENT] to stop editing and save the new figure or [ESC] to cancel the change.
Test HiStart Temperature – When active, the HiStart temperature is used at the start of the test, and the test continues at that temperature until the rate of moisture loss falls to half of its peak value. The heater then changes to the Test temperature for the remainder of the test. This shortens a long test and may be useful for tests > 15 minutes. When used, try a HiStart temperature 25ºC above the Test temperature. To deactivate the HiStart feature, set the HiStart temperature to 25ºC.
Idle Temperature - The temperature that is maintained by the instrument between tests. This speeds testing, by decreasing the time required to heat the sample chamber at the beginning of the test. It can save 10 to 120 seconds of test time if properly used. A common idle temperature value is 50ºC or 80ºC for most products. For plastics, a 100ºC idle is desirable. For ashing, a 100ºC idle may be desirable to reduce time between tests. Any value between room temperature and 300º C can be used. Experiment to see what value is best for your application. Too high a value will cause low results because the sample is evaporating while the basis weight is being measured at the beginning of the test.
Temp Rate - The temperature is controlled to the specified rate while ramping to the setpoint. Set to 0 to disable. Do not use this in conjunction with ash rate.
TEMP RATE MUST NOT BE USED AT ASHING TEMPERATURES BECAUSE IT WILL NOT PREVENT SAMPLE IGNITION AND HEATER DAMAGE CAN RESULT. INSTEAD, USE ASH RATE TO PREVENT SAMPLE IGNITION.
Chamber Stabilization - When a number other than zero is entered, a chamber stability warning will appear at the bottom of the Main Test Screen. Although this function will not prevent tests from being run, the results from extremely low/high moisture samples will be improved if the test is not started until the display indicates “CHAMBER STABLE”. For ultra low moisture samples,
AZI Customer Service | Page 25 of 92 |
