T06 US Steel Mobility Test Rig - Revision history

Gerhard Marais: /* Test Procedure */

2010-07-26T13:58:07Z

‎Test Procedure

Gerhard Marais at 11:53, 9 July 2010

2010-07-09T11:53:53Z

Gerhard Marais at 11:51, 9 July 2010

2010-07-09T11:51:58Z

137.215.6.53 at 10:44, 9 July 2010

2010-07-09T10:44:51Z

Gerhard Marais: Created page with 'The Mettler Mass Comparator in the Tribology Lab The Mettler Coparator Balance is not a normal mass meter. It is used for measur...'

2010-07-08T13:58:51Z

Created page with 'The Mettler Mass Comparator in the Tribology Lab The Mettler Coparator Balance is not a normal mass meter. It is used for measur...'

New page

[[File:Mettler_%282010%29.JPG|500px|right|thumb|The Mettler Mass Comparator in the Tribology Lab]]
The Mettler Coparator Balance is not a normal mass meter. It is used for measuring very small changes in mass AND SHOULD ONLY BE USED TO MEASURE THE FZG GEARS BEFORE AND AFTER TESTS.

== Documentation ==
Mettler Mass Comparator User Manual is available [ftp://anonymous@ragnarok.up.ac.za/publicftp/lab/Tribology/Mettler%20Mass%20Comparator/User%20Manual%20%28Mettler%29.pdf here]. Please read the manual before using the instrument.

== Time Line ==
Comparator fixed by Mettler and returned on 27 June 2010.

== User Tips ==
When starting the instrument in the morning, place a weight of known mass onto the scale and take the reading. Write the value down. If this value deviates too much from the original value (the value on the day of calibration), contact the Mettler people to re-calibrate the machine. The following weights were measured on 04 June 2010:
* Gerrie's 2 kg weight = 1999.820 g
* Gerrie's 1 kg weight = 1000.141 g

Another useful tip is to move the weight around on the surface of the scale when you make your first reading. This ensures that the whole surface is "activated" and ensures better accuracy.

← Older revision		Revision as of 13:58, 26 July 2010
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	== Test Procedure ==		== Test Procedure ==
		+
		+	Download the [ftp://anonymous@ragnarok.up.ac.za/publicftp/lab/Tribology/US%20Steel%20Mobility%20Test%20Rig/BE%40UP%20Tribology%20lab%20Test%20Descriptions%20-%20%28US%20Steel%20Mobility%29.pdf US Steel Grease Mobility Test Procedure]
		+
		+	Grease mobility is a measure of the resistance to flow under prescribed conditions. The measure of resistance to grease flow at a prescribed pressure and temperature predicates the pumpability characteristics of lubricants under low temperature operating conditions.
		+
		+	The test sample is placed in a high pressure container which is connected to a nitrogen cylinder fitted with a pressure regulator. A capillary (6 inches long (152,4 mm) with a 0.150 inches inside diameter (3,81 mm)) is fitted to the grease container.
		+
		+	A delivery pressure of 150 psi (1 034 kPa) is applied by means of the nitrogen in the nitrogen cylinder. Sufficient grease is collected for a measured amount of time to calculate the mobility in grams per second.
		+
		+	Tests at low temperatures are conducted by placing the loaded grease container in a refrigerator overnight. Tests are carried out at -15, -5, 0, 5, 10 and 20°C.

← Older revision		Revision as of 11:53, 9 July 2010
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−	[[File:US_Steel_Mobility.JPG\|400px\|right\|thumb\|The ~~Mettler Mass Comparator~~ in the Tribology Lab]]	+	[[File:US_Steel_Mobility.JPG\|400px\|right\|thumb\|The US Steel Mobility Test Rig in the Tribology Lab]]

	== Documentation ==		== Documentation ==

@@ Line 1: / Line 1: @@
-[[File:Mettler_%282010%29.JPG|500px|right|thumb|The Mettler Mass Comparator in the Tribology Lab]]
+[[File:US_Steel_Mobility.JPG|400px|right|thumb|The Mettler Mass Comparator in the Tribology Lab]]
-The Mettler Coparator Balance is not a normal mass meter. It is used for measuring very small changes in mass AND SHOULD ONLY BE USED TO MEASURE THE FZG GEARS BEFORE AND AFTER TESTS.
 == Documentation ==

@@ Line 3: / Line 3: @@
 == Documentation ==
-== User Tips ==
+== Test Procedure ==
-When starting the instrument in the morning, place a weight of known mass onto the scale and take the reading. Write the value down. If this value deviates too much from the original value (the value on the day of calibration), contact the Mettler people to re-calibrate the machine. The following weights were measured on 04 June 2010:
-* Gerrie's 2 kg weight = 1999.820 g
-* Gerrie's 1 kg weight = 1000.141 g
-−
-Another useful tip is to move the weight around on the surface of the scale when you make your first reading. This ensures that the whole surface is "activated" and ensures better accuracy.