# US 2013/0152677 A1 · Method and apparatus for adjusting a density measuring device

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2013/0152677 A1
- Document ID: US20130152677A1
- Status: Published application
- Kind: A1
- Application number: 13/713,612
- Filed: 2012-12-13
- Published: 2013-06-20
- Earliest claimed: 2011-12-16
- Assignees: Endress + Hauser Process Solutions AG
- Inventors: Stefan Brandlin; Jurgen Abraham
- Web page: https://patentgrep.com/patent/US20130152677A1

## CPC

- G01N 9/32: by using flow properties of fluids, e.g. flow through tubes or apertures
- G01N 9/00: Investigating density or specific gravity of materials; Analysing materials by determining density or specific gravity
- G01N 2001/2893: {Preparing calibration standards}
- G01N 2009/006: {vibrating tube, tuning fork}
- G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q)

## Abstract

A method for adjusting a density measuring device, wherein the method includes at least the steps of: producing a reference medium of a predeterminable density; supplying the reference medium to an adjusted, reference, density measuring device; determining the density of the reference medium with the reference density measuring device; supplying the reference medium to the density measuring device to be adjusted; registering with the density measuring device to be adjusted a measured value representing the density; and associating the measured value with the density determined with the reference density measuring device. Further an apparatus for performing the method is noted.

## Claims

### Claim at position 1

1-10. (canceled)

### Claim 11

A method for adjusting a density measuring device, wherein the method comprises the steps of:
producing a reference medium of a predeterminable density;
supplying the reference medium to an adjusted, reference, density measuring device and determining the density of the reference medium with the reference density measuring device;
supplying the reference medium to the density measuring device to be adjusted;
registering with the density measuring device to be adjusted a measured value representing the density; and
associating the measured value with the density determined with the reference density measuring device.

### Claim 12 (depends on 11)

The method as claimed in claim 11, further:
heating the reference medium to a predeterminable temperature and the measured value is registered at the predetermined temperature.

### Claim 13 (depends on 11)

The method as claimed in claim 11, wherein:
the reference medium is produced in a transportable container, fed for adjusting to the density measuring device to be adjusted and after the adjusting, fed back into the container.

### Claim 14

An apparatus for adjusting a density measuring device according to a method including: producing a reference medium of a predeterminable density; supplying the reference medium to an adjusted, reference, density measuring device and determining the density of the reference medium with the reference density measuring device; supplying the reference medium to the density measuring device to be adjusted; registering with the density measuring device to be adjusted a measured value representing the density; and associating the measured value with the density determined with the reference density measuring device, wherein the apparatus comprises:
a container for accommodating a reference medium of predeterminable density;
a supply line, which supplies the reference medium to the density measuring device to be adjusted; and
an adjusted, reference, density measuring device, which is inserted into a supply line and is embodied to determine and to indicate the density of the reference medium.

### Claim 15 (depends on 14)

The apparatus as claimed in claim 14, further comprising:
a container having a heating element, by means of which the reference medium is heatable to a predeterminable temperature.

### Claim 16 (depends on 15)

The apparatus as claimed in claim 15, further comprising:
a return line, which leads the reference medium from said density measuring device to be adjusted back into said container.

### Claim 17 (depends on 16)

The apparatus as claimed in claim 16, wherein:
at least the return line includes at least one valve, which is embodied to prevent the occurrence of air bubbles in the reference medium.

### Claim 18 (depends on 15)

The apparatus as claimed in claim 15, further comprising:
a rollable holder, on which at least said container, said supply line and said reference density measuring device are mounted.

### Claim 19 (depends on 14)

The apparatus as claimed in claim 14, further comprising:
at least one pump with controllable power for supplying the reference medium.

### Claim 20 (depends on 14)

The apparatus as claimed in claim 14, wherein:
said reference density measuring device is a density sensitive, Coriolis, mass flow transducer.