NZQA registered unit standard
2632 version 6
Page 1 of 3
Title
Demonstrate knowledge of level measurement systems used in
industry
Level
3
Credits
3
Purpose
People credited with this unit standard are able to:
 demonstrate knowledge of pressure measurement devices
used for level measurement;
 calibrate level measurement devices; and
 demonstrate knowledge of calibration methods for a level
measurement system.
Classification
Industrial Measurement and Control > Industrial Measurement
and Control - Theory
Available grade
Achieved
Explanatory notes
1
Reference
ANSI/ISA-51.1-1979 (R1993) Process Instrumentation Terminology;
and all subsequent amendments and replacements.
2
Definition
Industry requirements – includes all asset owner requirements; manufacturers’
specifications; enterprise requirements which cover the documented workplace
policies, procedures, specifications, and business requirements; and quality
management requirements relevant to the assessment being carried out.
Outcomes and evidence requirements
Outcome 1
Demonstrate knowledge of pressure measurement devices used for level measurement.
Evidence requirements
1.1
Describe differential pressure transmitters and their installation, as used for tank
liquid level measurement systems.
Range
1.2
open tank, closed tank (wet leg, dry leg), diaphragm seals, bubble
tube.
Describe measurement methods for liquid levels.
Range
The Skills Organisation
SSB Code 100401
float, sight glass, displacer, ultrasonic, radar, nuclear radiation,
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
2632 version 6
Page 2 of 3
capacitive, resistive, conductive.
1.3
Describe level measurement methods for solids and powder.
Range
1.4
Outline alternative applications of level measurement devices.
Range
1.5
ultrasonic, radar, nuclear radiation, capacitive.
differential pressure transmitters used for density measurement.
Explain non-linear tank level measurement applications.
Outcome 2
Calibrate level measurement devices.
Range
pressure transmitters.
Evidence requirements
2.1
Explain and follow safe work procedures.
Range
2.2
Select test equipment according to the accuracy and range of the device.
Range
2.3
temperature, vibration, wear, selection of device.
Calibrate devices by making appropriate adjustments.
Range
2.5
deadweight tester, manometer, comparator.
Identify types and cause of typical measurement errors.
Range
2.4
isolation, filled systems, chemical (oxygen or oil), pressure,
mercury.
zero, span, linearity, head correction.
Record test results in accordance with industry requirements.
Outcome 3
Demonstrate knowledge of calibration methods for a level measurement system.
Range
level measurement systems may include – displacer, ultrasonic, radar, nuclear
radiation, capacitive, resistive, conductive;
evidence of one level measurement system is required.
The Skills Organisation
SSB Code 100401
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
2632 version 6
Page 3 of 3
Evidence requirements
3.1
Explain and follow safe work procedures.
Range
3.2
pressure, radiation, tank products.
Describe calibration procedures with reference to calibration principles and
manufacturer’s instructions.
Planned review date
31 December 2017
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
31 October 1995
31 December 2013
Revision
2
30 October 1997
31 December 2013
Revision
3
3 April 2001
31 December 2013
Review
4
22 June 2001
31 December 2013
Review
5
19 May 2008
31 December 2019
Review
6
28 November 2013
N/A
Consent and Moderation Requirements (CMR) reference
0003
This CMR can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Please note
Providers must be granted consent to assess against standards (accredited) by NZQA,
before they can report credits from assessment against unit standards or deliver courses
of study leading to that assessment.
Industry Training Organisations must be granted consent to assess against standards by
NZQA before they can register credits from assessment against unit standards.
Providers and Industry Training Organisations, which have been granted consent and
which are assessing against unit standards must engage with the moderation system that
applies to those standards.
Requirements for consent to assess and an outline of the moderation system that applies
to this standard are outlined in the Consent and Moderation Requirements (CMR). The
CMR also includes useful information about special requirements for organisations wishing
to develop education and training programmes, such as minimum qualifications for tutors
and assessors, and special resource requirements.
Comments on this unit standard
Please contact The Skills Organisation reviewcomments@skills.org.nz if you wish to
suggest changes to the content of this unit standard.
The Skills Organisation
SSB Code 100401
 New Zealand Qualifications Authority 2016