Tension Meter DTMB for EDM

3 Tension ranges from 0.1 - 500 cN to 250 - 2500 cN

Electronic tension meter for checking tension of wires at EDM wire machines
Tension meter for EDM wires with approx. 0.05 and 0.25 mm Ø

Basic unit for easy operation

Special Features

  • Microprocessor controlled tension meter for highest accuracy
  • Selectable update rates (0.5, 1, 2 or 4 seconds) to provide steady readings when tensions fluctuate (electronic damping)
  • Measuring frequency: 62 measurements/second
  • The display shows averaged values calculated during the update
    interval t1 e. g. every second 1 x
Graph of the measured values tension meter DTMB for EDM
DIP switch tension meter model DTMB for EDM
DIP switch
for adjustments
by operator e. g.
display update time
  • Saving MIN, MAX and PEAK values during a user-selected period. These values can be recalled at the display.
  • Zero adjustment feature permits use of the tension meter in various measuring positions, maintaining highest accuracy
  • Measuring principle: double beam in bending with strain gauge
  • Calibration to customer supplied material is available (up to two different material calibrations)
  • Tension meter with built-in material thickness compensator improves accuracy for changing diameters (from tension range - 500 cN)
  • Hand-held unit with built-in mounting holes permit fixed installation for online use
mounting and material thickness compensator tension meter model DTMB for EDM Easy mounting: For online application

Material thickness compensator: For better accuracy the
material to be measured or a similar material with the same
diameter should be inserted

Standard Features

  • Everything in operator’s view:
    - the guide rollers
    - the measured material
    - the readings
  • Filament guide and roller shifting mechanism ensure easy acquisition of the running material
  • Ball-bearing mounted, V-grooved guide rollers
  • Tension meter with rugged aluminium housing
  • Battery operated (AC adapter for continuous operation available)
  • Certificate of Compliance with the order 2.1 according EN 10204 is included
  • Optionally available: Insprection Certificate 3.1 according EN 10204 with calibration report

Wire EDM Information

Wire EDM Information Click picture
to get more Information
about wire EDM machines

Available Models

ModelTension Range
SCHMIDT Calibration
wire industry
e.g. EDM wire
DTMB-5000.1 - 500.00.1 cN650.12+0.20 mm Øca. 0.05 mm ØX
DTMB-2000200 - 20001 cN650.40+0.70 mm Øca. 0.25 mm ØX
DTMB-2500250 - 25001 cN1160.40+0.70 mm Øca. 0.25 mm ØX

Other tension ranges and measuring head widths are available on request.
Other units of measure are available, such as  g.
* Depending on model, either width of filament guide or outer distance between outside guide rollers.
** Suitable for 95 % of applications - PA = Polyamide Monofilament
*** Material Thickness Compensator

Calibration to customized material:
If process material differs significantly from the SCHMIDT calibration material in diameter, rigidity or shape, special calibration using customer supplied samples is recommended. For this purpose a material sample of about 5 m should be supplied.

Guide Rollers

Line Speed
Roller Material
Standard2000Hardcoated aluminium
Code CE11000Ceramic

Click the order-code, to get picture and drawing of the guide rollers

Spare Rollers

Guide Rollers

Click picture to get an
overview for the guide rollers

Accessories (optional)

AC Adapter DTM-AC

100 - 240 V AC, 50 - 60 Hz with 3 adapters (EU/USA/UK)
Order number: K50100

Click picture for more information

Calibration Report (optional)

Calibration Report

Inspection Certificate 3.1 according DIN EN 10204
including a calibration report is optional available

Click picture for more information

Ordering Example

To place an order Model with

Code for
guide rollers

(if not standard)

Order No.
Please indicate the com-
plete order number, e. g.:
DTMB-500 + CE = DTMB-500-CE

Delivery Includes

scope of delivery tension meter DTMB for EDM: Tension meter with carrying case, batteries, operating instruction in german or english (as requested), Certificate of compliance with the order 2.1 according EN 10204 free of charge


Dimensions For PDF-file please
click picture


Calibration:According to SCHMIDT factory procedure
Accuracy:From 10 % up to 90 % of tension range:
±0.5 % full scale and ±1 digit
remaining tension range and other calibration materials:
±3 % full scale und ±1 digit
Overrange:Approx. 15 % full scale, without accuracy guarantee
Overload protection:100 %
Measuring principle:Strain gauge bridge
Measuring roller deflection:Max. 0.2 mm
Signal processing:Digital
Measuring frequency:62 measurements/s
Converter:12 bit A / D
Temperature coefficient:Gain: less than ±0.01 % full scale/ºC
Zero point: less than ±0.3 % full scale/ºC
Display:LCD 4 digit, 12 mm high
Display update rate:Adjustable 0.5, 1, 2 or 4 s (averaging)
Field adjustment:±7 steps in 1.5 % increment
Memory:MIN, MAX, PEAK and last value
Temperature range:10 - 45 ºC
Air humidity:85 % RH, max.
Power supply:4 Batteries 1.5 V, size AA (Approx. 20 h continuous use)
Auto Power Off:After 2 minutes of non-use
Housing material:Die-cast aluminium
Dimension:See dimensions above
Weight, net (gross):Approx. 680 g (approx. 1500 g)

Specifications subject to change without notice!



New Tension Meter


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