QM 333 Chart | Environmental Cycle Chart for climatic tests
This page covers QM 333 Chart used as Environmental Cycle Chart.This QM 333 chart is used for climatic tests for RF, Wireless and electronic systems testing.
Following designations are useful to understand the QM-333 chart.
| legend | Description |
|---|---|
| TSL | LOWEST TEMPERATURE AT WHITCH SPECIFICATIONS ARE GUARANTED |
| TSH | HIGHEST TEMPERATURE AT WHITCH SPECIFICATIONS ARE GUARANTED |
| TOL | LOWEST TEMPERATURE AT WHITCH EQUIPMENT IS TO REMAIN OPERATIONAL |
| TOH | HIGHEST TEMPERATURE AT WHITCH EQUIPMENT IS TO REMAIN OPERATIONAL |
| TL | MINIMUM STORAGE TEMPERATURE |
| TH | MAXIMUM STORAGE TEMPERATURE |
| R | RECOVERY 1 TO 2 HOURS FOR DAMP HEAT TESTS < 1 Hr. FOR OTHER TESTS |
| S | RATE OF RISE OR FALL OF TEMPERATURE [(TH-TL)/15]o C/MIN. OR 5 ± 1o C |
| C | 25 ± 3o 95% RH |
| A | LESS THAN OR EQUAL TO 1o C/MIN. |
AMBIENT: 15 to 35o C, 45 to 75 RH
Tolerance:-
Temperature: ±2o C
Humidity: ±2% RH
| Legend | Description |
|---|---|
| T | 1 Hour |
| T1 | 2 Hours |
| T2 | 2-3 Hours |
| T3 | 6-8 Hours |
| T4 | 3-8 Hours |
| T5 | 3-6 Hours |
| T6 | 3 Hours |
| Equipment Category |
Location | TOL | TSL | TOH | TSH | TL | TH |
|---|---|---|---|---|---|---|---|
| A | AC ROOMS | 0 | 20 | 35 | 30 | -5 | 60 |
| B | NON AC | -5 | 0 | 55 | 50 | -5 | 60 |
| C | BURIED | 5 | 15 | 40 | 35 | -5 | 60 |
| D | POLE MOUNTED | -10(0) | 55 | 60 | -15(-5) | -15(-5) | 60 |
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