TR150 Digital Readout Unit

TR150 Digital Readout Unit

Compatible with most Strain Gauge Based Sensors & Transducers

Approx. Weight (kg)0.26
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Call Impact +44 (0)1294 602626

This is a completely portable, precision instrument packaged in a small, robust IP65 (NEMA 4) enclosure, weighing only 260g. The readout unit accepts an input range of up to 50mV/V.


  • 7-Digit LCD Display (±9999999)
  • Input: 5mV/V (50mV/V optional)
  • Environmental Protection: IP65
  • 2 Ranges / Engineering Units
  • Optional RS232 Serial Data Output
  • Integrated TEDS (IEEE1451, Template 33)


For simplified use, the operator only has access to six keys; on/off, gross/net, peak, trough, hold and shunt cal. Calibration and configuration can be performed from the front panel, with protection against accidental or un-intentional changes. The configuration menu is very simple and enables the setting of a tare value, display resolution, filter rate, auto power off and selection of low power mode.

There are 3 calibration options; a single pass auto-calibration, entering of load cell sensitivity and corresponding display value and entering of offset and gain values for corresponding display values

Two separate ranges are available, which enable the instrument to read and display two separate parameters; i.e. lbs/kg, tonne/kN, high/low resolution, fast/slow response etc. The menu options offer the engineer the ability to tailor the instruments response to the application. In each range all the variables can be set, including zero and filtering.

Annunciators on the display give a constant indication of the operating mode.

The readout unit features an innovative power saving facility which when enable can offer up to 450 hours battery life with a 350 ohm bridge connected. In normal power mode up to 45 hours battery life is achieved with a 350 ohm bridge.It also incorporates a auto power off facility, which can be set during configuration in 1 minute increments up to 99 minutes, or it can be disabled so the instrument is powered on until the off key is depressed.



Display 7-digit LCD (±9999999) 8.8mm high
Resolution 1pt. in 250,000 @ 1Hz update, 1pt. In 65,000 @ 10Hz update digit
Accuracy ± 0.005% (±0.001% typical) Non-linearity as % of full scale
Bridge Excitation 5.0 ±4% volts dc
Maximum Excitation Current 59.0 mA
Input Range Up to ±5mV/V (±50mV/V can be supplied optionally) mV/V for display reading of ±19999
Minimum Bridge Resistance 85ohms (4x 350ohm sensors in parallel) to 5000ohms
Update Rate 0.5 ,1 , 3, 10, 25 (selectable) Hz
Electrical connection 5-pin Binder socket (mating plug supplied)
Annunciators Low battery warning, peak, trough, hold, net, shunt cal, range
Operating Temperature -10 to +50 °C
Thermal Drift <12 ppm/°C
Integral Battery 2x AA (1.5V Alkaline)
Battery Life (with 30 ohm sensor) 35 in normal mode or 450 in power saving mode Hours
Configurable Auto Power Off 1-99 (in 1 minute steps) Minutes
Keypad Tactile, with rim embossed keys
Environmental Protection IP65 (when mating plug fitted)
Enclosure type ABS, dark grey (Leather carry case optional)
Weight 250 approx. grammes
Communications RS232 (Optional)
Automatic Sensor Calibration Via integrated TEDS capability (IEEE1451, template 33)

ClickClick to view a PDF file of the User Guide

A user guide is available to download from the Impact web site