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Tesa TT20

TESA TESATRONIC TT20 Measuring System with GT-31 Probe
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The item for sale is a used TESA TESATRONIC TT20 electronic measuring system supplied with a TESA GT-31 lever-type inductive probe.
The TT20 is designed for use with one or two TESA inductive probes. It supports individual measurements as well as sum and difference measurements, making it suitable for dimensional inspection, production control, workshop applications and metrology laboratories.

PRODUCT IDENTIFICATION
• Manufacturer: TESA Technology / TESA SA
• Model: TESATRONIC TT20
• Display unit order number / Type No.: 04430009
• Probe model: TESA GT-31 Gage Head, 10P
• Probe part number: 32.10802
• Country of manufacture: Switzerland
• Applicable standard: DIN 32876, Part 1
• Number of probe inputs: 2 – channels A and B

TT20 TECHNICAL SPECIFICATIONS
• Number of measuring ranges: 7
• Minimum selectable measuring range: ±5 µm
• Maximum selectable measuring range: ±5000 µm
• Display resolution: 0.1 µm
• Measurement modes: channel A, channel B, sum and difference
• Units: metric and inch
• Range selection: manual or automatic according to the measured value
• Response time of the analogue, digital and LED classification displays: ≤80 ms
• Digital display holding time: 80 ms

DISPLAY
• Combined digital and pseudo-analogue LCD indication
• LCD dimensions: 126 × 62 mm
• Numerical display: 6 digits plus “+” or “–” sign
• Digit dimensions: 12.5 × 6.6 mm
• Pseudo-analogue scale length: 110 mm
• Number of analogue scale divisions: 50
• Selectable pointer or bar-graph indication

FUNCTIONS
• Two probe inputs for single, sum and difference measurements
• Manual or automatic measuring-range selection
• Direct conversion between metric and inch units
• Separate controls for each measuring channel
• Programmable tolerance limits
• Three-class value classification
• Coloured LED tolerance indication with signal outputs
• HOLD function for step-by-step measurement routines
• Automatic recognition of compatible TESA probes manufactured from 1997 onwards
• Bidirectional, opto-isolated RS-232 output
• D-Sub In/Out connector
• Power supply through an external mains adapter

CATALOGUE DISPLAY VALUE LIMITS
The following catalogue values apply at a temperature of 20°C and relative humidity of no more than 50%:
• Analogue display: 2%
• Digital display: 0.3%
• Digital output: 0.3%

These values refer to the TT20 display unit specification. They are not a current calibration result or a guaranteed accuracy value for this particular used set.

DIMENSIONS AND CONSTRUCTION
• Dimensions: 255 × 235 × 120 mm
• Dimensions are specified as width × depth × height
• Housing material: resistant plastic
• Installation: benchtop workshop or laboratory use

CONDITION
Used equipment with visible signs of normal use and storage.

The unit powers on, and the display and indicator lights operate as shown in the photographs. The display currently shows a selected measuring range of ±2000 µm. This is one of the available ranges and not the maximum capability of the TT20.

The unit has not been subjected to a complete laboratory performance test. No current calibration or verification certificate is included.

PACKAGE CONTENTS
• TESA TESATRONIC TT20 display unit, Type No. 04430009
• TESA GT-31 lever-type probe, part number 32.10802, marked 10P
• Connected cables shown in the photographs