Pensky-Martens Closed Cup Test Procedure - Revision history

10082388 at 06:37, 7 December 2011

2011-12-07T06:37:37Z

10082388 at 06:34, 7 December 2011

2011-12-07T06:34:13Z

10082388 at 06:26, 7 December 2011

2011-12-07T06:26:03Z

10082388 at 06:20, 7 December 2011

2011-12-07T06:20:57Z

10082388: /* Procedure A */

2011-12-06T07:09:46Z

‎Procedure A

10082388 at 07:07, 6 December 2011

2011-12-06T07:07:59Z

10082388 at 07:06, 6 December 2011

2011-12-06T07:06:52Z

10082388: /* Procedure A */

2011-12-06T07:04:57Z

‎Procedure A

10082388 at 07:04, 6 December 2011

2011-12-06T07:04:04Z

10082388 at 07:03, 6 December 2011

2011-12-06T07:03:16Z

← Older revision		Revision as of 06:37, 7 December 2011
Line 47:		Line 47:

	=== Procedure B ===		=== Procedure B ===
		+
		+	[[File:flame.jpg\|right]]

	1. Fill the test cup with the sample (up to the filling mark ) and ensure that the temperature of the sample is at least 18°C below the expected flashpoint of the substance.		1. Fill the test cup with the sample (up to the filling mark ) and ensure that the temperature of the sample is at least 18°C below the expected flashpoint of the substance.

@@ Line 1: / Line 1: @@
 == Summary ==
-[[File:tribology3.jpg|right]]
+[[File:tribologygasE.jpg|right]]
 The Pensky-Martens Closed Cup Tester can be used to determine the flashpoint of a petroleum product in the temperature range 40-360°C. The procedure used to determine the flashpoint is dependent on the petroleum product. Procedure A applies to distillate fuels such as diesel or kerosene, while procedure B is applicable to residual fuel oils, petroleum liquids that form a surface film under test conditions and used lubricating oils amongst others. The sample is contained in a brass test cup which is placed inside the apparatus and fitted with a testcover. The sample contained in the test cup is heated and stirred simultaneously. An external ignition source is periodically directed into the test cup (this momentarily interrupts the stirring). This is done until a flash is observed (meaning the sample has reached its flashpoint).

← Older revision		Revision as of 06:26, 7 December 2011
Line 18:		Line 18:

	=='''Test Procedures'''==		=='''Test Procedures'''==
		+
		+	[[File:tribology3E.jpg\|right]]

	=== Procedure A ===		=== Procedure A ===

← Older revision		Revision as of 06:20, 7 December 2011
Line 1:		Line 1:
	== Summary ==		== Summary ==
		+
		+	[[File:tribology3.jpg\|right]]

	The Pensky-Martens Closed Cup Tester can be used to determine the flashpoint of a petroleum product in the temperature range 40-360°C. The procedure used to determine the flashpoint is dependent on the petroleum product. Procedure A applies to distillate fuels such as diesel or kerosene, while procedure B is applicable to residual fuel oils, petroleum liquids that form a surface film under test conditions and used lubricating oils amongst others. The sample is contained in a brass test cup which is placed inside the apparatus and fitted with a testcover. The sample contained in the test cup is heated and stirred simultaneously. An external ignition source is periodically directed into the test cup (this momentarily interrupts the stirring). This is done until a flash is observed (meaning the sample has reached its flashpoint).		The Pensky-Martens Closed Cup Tester can be used to determine the flashpoint of a petroleum product in the temperature range 40-360°C. The procedure used to determine the flashpoint is dependent on the petroleum product. Procedure A applies to distillate fuels such as diesel or kerosene, while procedure B is applicable to residual fuel oils, petroleum liquids that form a surface film under test conditions and used lubricating oils amongst others. The sample is contained in a brass test cup which is placed inside the apparatus and fitted with a testcover. The sample contained in the test cup is heated and stirred simultaneously. An external ignition source is periodically directed into the test cup (this momentarily interrupts the stirring). This is done until a flash is observed (meaning the sample has reached its flashpoint).

← Older revision		Revision as of 07:09, 6 December 2011
Line 32:		Line 32:

	5.2. In the event that the expected flashpoint temperature of the sample is higher than 110°C, apply the ignition source as described in 5.1 at each temperature increase of 2°C.		5.2. In the event that the expected flashpoint temperature of the sample is higher than 110°C, apply the ignition source as described in 5.1 at each temperature increase of 2°C.
−

	5.3. When testing a sample to determine only whether volatile material contamination is present, the temperature limits proposed in 5.1 and 5.2 need not be adhered to.		5.3. When testing a sample to determine only whether volatile material contamination is present, the temperature limits proposed in 5.1 and 5.2 need not be adhered to.

@@ Line 37: / Line 37: @@
 .4.	In the event that the expected flashpoint temperature of the sample is not known, ensure that the temperature of the sample is 15+/-5°C. If the sample is very viscous at this temperature, heat it to a starting temperature as described in 5.1 and 5.2. Apply the ignition source (using the procedure described previously) beginning at least 5°C higher than the starting temperature.
 .5.	Record the flashpoint temperature as observed on the thermometer. This is done when a distinct flash within the test cup is observed on application of the ignition source.
@@ Line 48: / Line 47: @@
 .	Fill the test cup with the sample (up to the filling mark ) and ensure that the temperature of the sample is at least 18°C below the expected flashpoint of the substance.
-.	Open the gas and light the test flame using an external ignition source such as a blowlamp.
+.	Open the gas and light the test flame using an external ignition source. Adjust the flame to a diameter of 3.2 to 4.8mm using the dial on the front panel of the instrument.
 Adjust the flame to a diameter of 3.2 to 4.8mm using the dial on the front panel of the instrument.
 .	Switch on the turning device and ensure that it turns at a rate of 250+/-10rpm.

← Older revision		Revision as of 07:04, 6 December 2011
Line 29:		Line 29:

	5. Application of Ignition Source		5. Application of Ignition Source
−

	5.1. If the expected flashpoint temperature of the sample is 110°C or lower, the ignition source must be applied when the sample temperature is 23+/-5° C below the expected flash point and thereafter each time the temperature has increased by 1°C. Apply the ignition source by discontinuing the stirring of the sample and lowering the ignition source into the vapour space of the test cup (using the white lever on the test cover).		5.1. If the expected flashpoint temperature of the sample is 110°C or lower, the ignition source must be applied when the sample temperature is 23+/-5° C below the expected flash point and thereafter each time the temperature has increased by 1°C. Apply the ignition source by discontinuing the stirring of the sample and lowering the ignition source into the vapour space of the test cup (using the white lever on the test cover).

@@ Line 17: / Line 17: @@
 =='''Test Procedures'''==
-== Procedure A ==
+=== Procedure A ===
 .	Fill the test cup with the sample (up to the filling mark ) and ensure that the temperature of the sample is at least 18°C below the expected flashpoint of the substance.
@@ Line 46: / Line 46: @@
 and then remove the cover and test cup and clean as recommended in apparatus preparation.
-== Procedure B ==
+=== Procedure B ===
 .	Fill the test cup with the sample (up to the filling mark ) and ensure that the temperature of the sample is at least 18°C below the expected flashpoint of the substance.

← Older revision		Revision as of 07:03, 6 December 2011
Line 14:		Line 14:

	• Ensure that the gas cylinder is properly connected to the flashpoint apparatus.		• Ensure that the gas cylinder is properly connected to the flashpoint apparatus.
		+
		+	=='''Test Procedures'''==

	== Procedure A ==		== Procedure A ==