GB2108288A - Gravimetric diluter - Google Patents

Gravimetric diluter

Info

Publication number
GB2108288A
GB2108288A GB08227522A GB8227522A GB2108288A GB 2108288 A GB2108288 A GB 2108288A GB 08227522 A GB08227522 A GB 08227522A GB 8227522 A GB8227522 A GB 8227522A GB 2108288 A GB2108288 A GB 2108288A
Authority
GB
United Kingdom
Prior art keywords
diluent
container
sample
weight
dilution factor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB08227522A
Other versions
GB2108288B (en
Inventor
Jeptha E Campbell
Samuel Schalkowsky
Donald Whitley
James E Gilchrist
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Spiral Systems Inc
Original Assignee
Spiral Systems Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US06/232,531 external-priority patent/US4350186A/en
Priority claimed from US06/232,525 external-priority patent/US4345628A/en
Application filed by Spiral Systems Inc filed Critical Spiral Systems Inc
Publication of GB2108288A publication Critical patent/GB2108288A/en
Application granted granted Critical
Publication of GB2108288B publication Critical patent/GB2108288B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/38—Diluting, dispersing or mixing samples
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
    • G01N2035/00178—Special arrangements of analysers
    • G01N2035/00207—Handling bulk quantities of analyte
    • G01N2035/00217—Handling bulk quantities of analyte involving measurement of weight

Landscapes

  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Sampling And Sample Adjustment (AREA)
  • Automatic Analysis And Handling Materials Therefor (AREA)
  • External Artificial Organs (AREA)

Abstract

An apparatus (10) for making dilutions of a sample (11) with a diluent (36) to a predetermined dilution factor f by weight of the diluent. A scale (12) with TARE capability produces an output signal of the weight W of a sample within a container (20) less the weight of the container. A dilution factor control (24) is provided for setting the predetermined dilution factor f. Blocks (218 and 220) are provided for calculating and storing the value TW = W/f which is the total weight of the sample plus the weight of the diluent which is required to dilute the sample to the predetermined dilution factor f. A pump (42) is connected between a reservoir (38) of diluent and the container for the sample for pumping the amount of diluent into the container which is required to dilute the sample to the predetermined weight dilution factor f. The scale provides a continuous output of the weight W of the sample plus diluent in the container at any instant in time. Decision point (256) is provided for determining when TW - W = 0. In one embodiment, the flow of diluent to the container is stopped by closing a pair of valves (34 and 46) located between the pump and the container when TW - W = 0.
GB08227522A 1981-02-09 1982-02-04 Gravimetric diluter Expired GB2108288B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/232,531 US4350186A (en) 1981-02-09 1981-02-09 Gravimetric diluter
US06/232,525 US4345628A (en) 1981-02-09 1981-02-09 Gravimetric diluter

Publications (2)

Publication Number Publication Date
GB2108288A true GB2108288A (en) 1983-05-11
GB2108288B GB2108288B (en) 1985-03-06

Family

ID=26926083

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08227522A Expired GB2108288B (en) 1981-02-09 1982-02-04 Gravimetric diluter

Country Status (5)

Country Link
EP (1) EP0070893A4 (en)
JP (1) JPS58500337A (en)
DE (1) DE3231634T1 (en)
GB (1) GB2108288B (en)
WO (1) WO1982002696A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2193581A (en) * 1986-07-03 1988-02-10 Francis Packaging Ltd Fluid dispensing apparatus and method of operation thereof

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2579749B1 (en) * 1985-03-28 1988-06-24 Serg Gts AUTOMATIC DILUTION DEVICE, BY PERMANENT TAKING OF LIQUID SAMPLES TO BE DILUTED AND BY DISCONTINUOUS DILUTION
IT1267078B1 (en) * 1993-10-25 1997-01-24 Alfatech Srl EQUIPMENT FOR THE PREPARATION OF SOLUTIONS
US8576217B2 (en) 2011-05-20 2013-11-05 Ignis Innovation Inc. System and methods for extraction of threshold and mobility parameters in AMOLED displays
FR2931942B1 (en) 2008-05-30 2011-03-04 Aes Chemunex APPARATUS FOR DILUTION OF A SAMPLE
CA2669367A1 (en) 2009-06-16 2010-12-16 Ignis Innovation Inc Compensation technique for color shift in displays
US8803417B2 (en) 2009-12-01 2014-08-12 Ignis Innovation Inc. High resolution pixel architecture
CA2687631A1 (en) 2009-12-06 2011-06-06 Ignis Innovation Inc Low power driving scheme for display applications

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB984699A (en) * 1962-03-16 1965-03-03 Lucas Industries Ltd Apparatus for dispensing predetermined weights of a plurality of different liquid or granular materials
US3254728A (en) * 1964-03-11 1966-06-07 Howe Richardson Scale Co Automatic batch weigher using digital count-down control system
US3398689A (en) * 1966-01-05 1968-08-27 Instrumentation Specialties Co Apparatus providing a constant-rate two-component flow stream
US3528518A (en) * 1967-08-03 1970-09-15 Howe Richardson Scale Co Automatic batch weigher
US3516506A (en) * 1967-09-18 1970-06-23 Auto Control Inc Control apparatus for automatic industrial operations
US3805141A (en) * 1973-01-08 1974-04-16 United Aircraft Corp Bimodal inverter
JPS506994A (en) * 1973-05-25 1975-01-24
JPS5176664A (en) * 1974-12-26 1976-07-02 Daiju Doro Kensetsu Kk Nishunoekijotaino kongonodochoseihoho
US3959636A (en) * 1975-03-10 1976-05-25 Mangood Corporation Batching system
US4222448A (en) * 1979-06-29 1980-09-16 Owens-Corning Fiberglas Corporation Automatic batch weighing system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2193581A (en) * 1986-07-03 1988-02-10 Francis Packaging Ltd Fluid dispensing apparatus and method of operation thereof
GB2193581B (en) * 1986-07-03 1990-09-19 Francis Packaging Ltd Fluid dispensing apparatus and method of operation thereof

Also Published As

Publication number Publication date
GB2108288B (en) 1985-03-06
EP0070893A1 (en) 1983-02-09
WO1982002696A1 (en) 1982-08-19
DE3231634T1 (en) 1983-12-01
JPH0442619B2 (en) 1992-07-14
JPS58500337A (en) 1983-03-03
EP0070893A4 (en) 1983-06-08

Similar Documents

Publication Publication Date Title
US4345628A (en) Gravimetric diluter
US4350186A (en) Gravimetric diluter
US3529529A (en) Method and means for controlling the addition of replenisher to automatic photographic film processors
US20050102067A1 (en) Diluting system and method
DE3664382D1 (en) Barrel weighing device
GB2108288A (en) Gravimetric diluter
GB1305783A (en)
EP0434207A2 (en) Gas pressure comparison pycnometer
JPS5749089A (en) Liquid supply system
JPS55104724A (en) Method for zero adjusting of automatic weighing machine
JPS5661227A (en) Constant flow rate transporting system
GB1470907A (en) Method and apparatus for measuring a physical property of a fluid that varies non-linearly relative to the density of the fluid
US2959055A (en) Fluid meter
JPS56148019A (en) Flow rate controlling method using measuring hopper
ZA848851B (en) Method and apparatus for monitoring and controlling production line filling of receptacles with a predetermined weight of variable density material
Begg Concentration effects in a dynamic model of the Technicon AutoAnalyzer
US4569224A (en) Device for measuring the absolute value of the density of salts in atmosphere
JPS56154665A (en) Blank test to reagent in automatic analytical device
JPS57108717A (en) Continuous type flowmeter and constant volume supply device for liquid
CN208052287U (en) Mixing plant additive metering bucket
JPS571619A (en) Discharge processing device
JPH01237433A (en) Apparatus for measuring surface moisture rate of fine aggregate
Markin The properties of the interfacial boundary in one model of a porous body
JPS5710417A (en) Liquid level measuring device
JPS5527980A (en) Continuous liquid drawing method

Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19970204