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921B Displacement Force Test Station Specifications & Features

Model 921 Force Displacement and Switch Test Station

Power Requirements	115/220 V ac, 50/60 Hz, 230 VA
Test Speed	As fast as 8 mm/s (0.32 inch/s); as slow as 0.0254 mm/s (0.001 inch/s)
Measurement Units	Metric or English - user selectable

Displacement*
Range:	0 to 62.51 mm (0 to 2.46 inches) programmable
Resolution:	0.00254 mm (0.0001 inch) programmable
Abs Accuracy:	±0.00762 mm (±0.0003 inch) max
Repeatability:	±0.00762 mm (±0.0003 inch) max

Force*
Range:	0 to 3.60 kg (0 to 127 oz); other available ranges include 0-75.0 g 0-2.65 oz), 0-360 g (0-12.7 oz), 0-2.00 kg (0-70.6 oz) and 0-22.68 kg (0-50.0 lb)
Resolution:	1 g (0.035 oz)
Abs Accuracy:	±0.25% of full scale max
Repeatability:	±0.1% of full scale max

Tested Parameters
Actuation:	Release:	Calculation:
F_MAX = actuation force	F_RESTORE = F_MIN @ release	Tactile ratio = (F_MAX - F_MIN) / F_MAX
F_MIN = minimum force	T_RESTORE = travel @ F_RESTORE
T_MIN = travel @ F_MIN
T_MAX = travel @ F_MAX

*Options available

Options

Resistance/Voltage Channel(FDR Mode)

Resistance range of 0 - 16 kΩ or voltage range of 0 - 4 V; other resistance/voltage range available. Measures resistance for tactile and non-tactile switches. Tests the following additional parameters:
F_MAKE, F_BREAK, F_LOW, T_MAKE, T_BREAK, T_LOW, R_MAX, R_MIN, R_MAKE, R_BREAK, R_RESTORE, R_LOW