Description
The ST-105 is a calibration box with standard ratios. It is used for calibration of any turn ratios measurement system. Housed in a rugged, waterproof case, it is very lightweight.
Features
- Housed in a rugged, lightweight waterproof case
- Standard Ratio to calibrate Turns Ratio Meters
- 2 years standard warranty
Specifications

Model:
ST105
Size:
L: 270 mm (10.6”) W: 245 mm (9.7”) H: 125 mm (4.9”)
Weight:
3.8 kg (8.3 lbs.)
Input power:
none
Test voltage:
max 100 VAC 49 - 61 Hz
Front panel:
sealed, anodized
Ratio ranges:
1:1 / 1:10 / 1:100 / 1:1'000 / 1:10'000
Operating temperature:
-10ºC to +30° C
Storage temperature:
-20°C to +70°C
See Instruction Manual for more Parameters.
Specifications are subject to change without notice.
Accuracy

Measurement parameters
Nominal Ratios
Initial Accuracy (at 100kΩ Load)
1:1
± 0.001%
1:10
± 0.005%
1:100
± 0.03%
1:1'000
± 0.05%
1:10'000
± 0.2%