Catalogue, lever-type dial test indicators, EN.pdf - 第4页
G-4 0 10 5 -5 20 15 -10 -15 -20 01 23 45 7 68 9 10 The international standard ISO 9493: 2011 is the main standard used for the metrological and dimensional characteristics of lev er indicators. Indication errors for: • T…
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Lever-type dial test indicators
01810005 01810205 01810011
Standard model (left)
The dial is parallel to the axis of the measuring insert and mounted frontally on the casing.
Perpendicular model (center)
The dial is mounted perpendicularly to the axis of the measuring insert.
Lateral model (right)
The dial is parallel to the axis of the measuring insert and mounted laterally on the casing.
The three types of TESA lever-type Dial Indicators
When using a lever-type dial indicator, if the position of the measuring insert is parallel to the surface
of the workpiece (left figure), meaning that the measuring force is perpendicular to the surface (F),
the 1.1 ratio is accurate. This means that the reading on the instrument is correct and does not require
adjustment.
In the opposite case (right figure), the lever length is reduced (L), and the readings on the indicator
dial must be corrected. The result given by the instrument should then be multiplied by a correction
factor, which depends on the tilt angle α between the probe and the surface of the workpiece.
The importance of the measuring insert position
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The international standard ISO 9493: 2011 is the main standard used for the metrological and
dimensional characteristics of lever indicators.
Indication errors for:
• Total measuring range (retractable and extending stem): MPEtot
• Measuring range (retractable stem): MPEe
• Partial measuring range: MPEp
- over 1 full turn
- over 1/2 turn
- over 1/10 turn
- over 10 divisions
• Hysteresis: MPEh
• Repeatability: MPEr
Metrological definitions
Partial measuring range
Extendable plunger
Measuring range (retractable
plunger)
Retractable plunger
Hysteresis error
Conventionally true value, mm
Total measuring
range (retractable and
extendable plunger)
Error of an instrument, μm
Lever-type dial test indicators
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Lever-type dial test indicators
Analogue lever-type dial test indicator
Digital lever-type dial test indicator
Revolution counter
Wired connection for data transmission
Rotary dial
Large high-contrast LCD screen
Adjustable insert
Pivoting on an angled bearing
Circular scale
Action keys
Housing with dovetail mounting
Needle
Rotary dial