EN ISO11997-1循環(huán)腐蝕試驗標準（鹽霧、干燥、潮濕）

Step

Time H

Temp℃

Condition

Notes

1

2

35±2

Salt spray

2

4

60±2

Dry：20-30%

3

2

50±2

Wet：95%RH or over

4

Go back to step 1

This makes a total cycle time of 8h from step1 to step3

Transtition time（ie time allowed to reach the temperature and relative humidity specified for a condition after changing to that condition）：

From salt spray to dry：within 30min

From dry to wet：within 150 min

From wet to salt spray：within 30min

The effect of the salt spray will，in principle，be instaneous。

For details of drying-air flow，see 6.4

NOTE  Set points and operational fluctuations can be listed either independently of each other or in the format：set point±operational fluctuations.The set point is the target condition for the sensor when used at the operational control point as programmed by the user.Operational fluctuations are deviations from the indicated set point at the control point indicated by the readout of the calibrated control sensor during equilibrium operation and do not include measurement uncertainty.At the operational control point , the user programmes that exat number . The operational fluctuations specified for that set point do not imply that the user is allowed to programme a set point higher or lower than the exact set point specified.

Step

Time

Temp

Condition

notes

1

24

35±2

Salt fog

2

8

40±2

100%RH

Water condensing on test panels

3

16

23±2

（50±20）%RH

4

8

40±2

100%RH

Water condensing on test panels

5

16

23±2

（50±20）%RH

6

8

40±2

100%RH

Water condensing on test panels

7

16

23±2

（50±20）%RH

8

8

40±2

100%RH

Water condensing on test panels

9

16

23±2

（50±20）%RH

10

48

23±2

（50±20）%RH

11

Go back to step 1

This makes the total cycle time 7 days from step1 to step10.

NOTE  Set points and operational fluctuations can be listed either independently of each other or in the format：set point±operational fluctuations.The set point is the target condition for the sensor when used at the operational control point as programmed by the user.Operational fluctuations are deviations from the indicated set point at the control point indicated by the readout of the calibrated control sensor during equilibrium operation and do not include measurement uncertainty.At the operational control point , the user programmes that exat number . The operational fluctuations specified for that set point do not imply that the user is allowed to programme a set point higher or lower than the exact set point specified.

Step

Time

min

Temp

℃

Condition

notes

1

210

30±2

Salt fog

2

210

40±2

Dry

Drying-air purge(see 6.4)

3

1470

40±2

（75±15）%RH

One method of achieving this conditon is to alternate the dry and humid cycles for suitable(short)time periods to keep the RH between the limits specified

4

102

30±2

Dry

Drying-air purge(see 6.4)

5

210

30±2

Salt fog

6

378

30±2

90% to 100%RH

Water condensing on test panel

7

180

35±2

Dry

Drying-air purge(see 6.4)

8

120

25±2

Dry

9

Go back to step 1

This makes the total cycle time 48h from step1 to step8.

NOTE  Set points and operational fluctuations can be listed either independently of each other or in the format：set point±operational fluctuations.The set point is the target condition for the sensor when used at the operational control point as programmed by the user.Operational fluctuations are deviations from the indicated set point at the control point indicated by the readout of the calibrated control sensor during equilibrium operation and do not include measurement uncertainty.At the operational control point , the user programmes that exat number . The operational fluctuations specified for that set point do not imply that the user is allowed to programme a set point higher or lower than the exact set point specified.

Step

Time H

Temp℃

Condition

Notes

1

0.5

30±2

Salt spray

2

1.5

30±2

Wet：（95±3）%RH

3

2

50±2

Hot dry

4

2

30±2

Warm dry

5

Go back to step 1

This makes a total cycle time of 6h from step1 to step4

Transtition time（ie time allowed to reach the temperature and relative humidity specified for a condition after changing to that condition）：

From salt spray to wet：within 10min

From wet to hot dry：within 15 min

From hot dry to salt warm dry：within 30min

From salt warm dry to salt spray：instaneous

NOTE  Set points and operational fluctuations can be listed either independently of each other or in the format：set point±operational fluctuations.The set point is the target condition for the sensor when used at the operational control point as programmed by the user.Operational fluctuations are deviations from the indicated set point at the control point indicated by the readout of the calibrated control sensor during equilibrium operation and do not include measurement uncertainty.At the operational control point , the user programmes that exat number . The operational fluctuations specified for that set point do not imply that the user is allowed to programme a set point higher or lower than the exact set point specified.