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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.

QM 333 Environmental Cycle Chart QM 333 legends

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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