55
MAINTENANCE
6. Calibration
6.1
INITIAL CALIBRATION
All Magtrol instruments are calibrated prior to shipment. There is a calibration label on each unit
as shown in the following figure.
MAGTROL, INC.
DATE:
CALIBRATION
BUFFALO, NY
716-668-5555
DUE:
S/N:
BY:
Figure 6–1 Calibration Label
This label tells the user when the next calibration is required, although Magtrol does recommend
that calibration be completed after the dynamometer, readout instrumentation and power supply are
set up for the first time.
6.2
CALIBRATION BEAMS AND WEIGHTS
To perform a successful dynamometer calibration, a precision weight heavy enough to apply a torque
at or close to the full scale rating is required. Magtrol offers precision weights (WT Series) and
calibration beams (CB Series) rated specifically for each Hysteresis Dynamometer.
Note:
The Pin Location represents the distance between the pin and
the center of the calibration beam. See
Figure 6–4 Calibration
Calculation
.
Calibration
Beam
Assembly
For
Hysteresis
Dynamometer
English
Metric and SI
Full Scale
Torque
Pin
Location
Weights
Full Scale Torque
Pin
Location
Weights
-6N series
in
Size
Model -7N series*
-8N series
cm
Size
Model
CB-106
HD-106
2.50 oz·in
2.500
1 oz WT-106
183.5 g·cm 18.00 mN·m
9.18
20 g WT-106M
CB-100
HD-100
11.00 oz·in
5.500
2 oz WT-100
815.8 g·cm 80.0 mN·m
8.16 100 g WT-100M
CB-400
HD-400
40.0 oz·in
5.000
8 oz WT-400
2.86 kg·cm
280 mN·m
14.28 200 g WT-400M
CB-500
HD-500
120.0 oz·in
7.500
1.0 lb WT-500
8.67 kg·cm
850 mN·m
17.34 500 g WT-500M
HD-510
HD-505
240 oz·in
7.500
2.0 lb WT-505 17.34 kg·cm 1700 mN·m
17.34 1.0 kg WT-505M
HD-515
CB-700
HD-700
440 oz·in
11.000
2.5 lb WT-700 31.61 kg·cm
3.10 N·m
31.61 1.0 kg WT-700M
HD-710
HD-705
55.0 lb·in
11.000
5.0 lb WT-705 63.22 kg·cm
6.20 N·m
31.61 2.0 kg WT-705M
HD-715
CB-800
HD-800
125.0 lb·in
15.625
8.0 lb WT-800 142.76 kg·cm
14.00 N·m
47.59 3.0 kg WT-800M
HD-810
HD-805
250 lb·in
15.625 16.0 lb WT-805 285.52 kg·cm
28.0 N·m
47.59 6.0 kg WT-805M
HD-815
CB-825
HD-825
500 lb·in
20.000 25.0 lb WT-825 576.14 kg·cm
56.5 N·m
38.41 15.0 kg WT-825M
* The -7N Full Scale Torque values are not exactly equivalant to the dynamometer ratings, but are instead
representative of the actual torque produced by the WT Series weights.
