
10 EN
2. Technical data
Designation TKRT 31
General
Memory Yes, 5 slots
Low battery indicator Yes
Auto switch off Yes
Measurement
Optical modes rpm and Hz
Contact modes rpm and Hz, meters, feet, inch, per min and per sec
Speed capture feature Maximum, minimum or average rate
Linear Speed Meters, feet, inch, per min and per sec
Optical Measurement
Rotational speed range 1 to 99999 r/min
Accuracy ±0.01% of reading ±1 digit
Measuring distance 25 mm to 1200 mm (1 in - 47 in)
Angle of operation ±30°
Laser sensor built-in class 2 laser
Contact Measurement
Rotational speed range Max. 20000 rpm for 36000 sec
Accuracy ±0.1% of reading ±1 digit
(>120 rpm or “high accuracy”)
“low accuracy” at < 120 rpm:
< 20 rpm -> ~±4%, (low update rate)
< 40 rpm -> ~±4%, (measuring 1/6 rotation)
< 60 rpm -> ~±2%, (measuring 2/6 rotation)
< 80 rpm -> ~±1.33%, (measuring 3/6 rotation)
< 100 rpm -> ~±1.0%, (measuring 4/6 rotation)
< 120 rpm -> ~±0,8%, (measuring 5/6 rotation)
> 120 rpm -> <±0,1%, (measuring full rotation)
Contact adaptors Included with removable cones & wheels
Power source 2 x AA batteries, rechargeable ones can be used
Run time ca. 8h (20% Display brightness, 50% Laser-On,
50% Bluetooth-On); 3h30 (100% Display brightness,
50% Laser-On, 50% Bluetooth-On)
Display Multi-line backlight TFT
Display update Continuous
Controls Direct selector switches