User`s manual
73
6. Calibration
Every new Magtrol WB/PB Series Dynamometer is factory calibrated. Static calibration of the zero
and torque is recommended from time to time, especially after having maintenance performed.
Note: Do not forget to unlock the dynamometer following transport (after
it returns from overhaul) in accordance with Section 2.1 – Locking
the Dynamometer for Transport.
6.1 BASIC CALIBRATION INFORMATION
Prior to calibration, the motor must be separated from the dynamometer so that the dynamometer
shaft can rotate freely.
6.1.1 c
AliBrAtion ArmS
Two calibration arms are delivered with each Magtrol WB/PB Series Dynamometer. These arms
are inserted into the threaded holes found on each side of the stator. See Figure 6–1 Calibration
Arm Mounting.
Each calibration arm has two grooves: the outer groove allows for calibration in N·m, the inner in mkp.
Note: Mkp is an obsolete unit of torque measurement. Magtrol recommends
calibration in N·m (by using the outer groove) and calibration weight
in kg. Refer to Section 6.1.2 – Calibration Weight.
4/2 15%0/7 %2 30%%$
#OL DWA TER
INL ET
4HREADEDHOLEFORATTACHING
THECALIBRATIONARM
2EMOVABLECALIBRATIONARMS
#ALIBRATIONWEIGHT
INKG
;.qM=
;MKP=
Figure 6–1 Calibration Arm Mounting
Caution: after Calibration, do not forget to remove the Calibration arms
from the dynamometer.