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Instrument Precision and Accuracy
| Dimension |
Instrument |
Manufacturer |
Model or Product No. |
Instrument Precision |
Instrument Accuracy |
Common Error Limiting Factor |
| Time |
digital stopwatch |
PASCO |
SE-8755 |
0.01 s |
10?ppm* |
reaction time (~0.2 s) |
| Time |
photogate |
Pasco |
ME-9206A |
1 ms |
0.01% |
data processing |
| Length |
meter stick |
Cenco |
73115 |
0.5 to 1 mm |
<0.5% |
visual resolution |
| Length |
Vernier calipers |
Craftsman |
40257 |
0.05 to 0.1 mm |
0.10% |
misreading scale |
| Mass |
electronic balance |
Ohaus |
GT 4000 |
0.01 to 0.1 g |
0.1% to 1% |
calibration |
| Mass |
brass mass sets |
|
|
1 g |
1% |
calibration |
| Frequency |
signal generator |
Instek |
FG-8016G |
3 to 4 digits |
0.1 to 1% |
calibration |
| Voltage |
multimeter |
Radio Shack |
22-163 |
1 to 4 digits |
1% |
calibration |
| V, freq. |
oscilloscope |
Tektronix |
2211 |
2 digits |
1% to 3% |
visual resolution, calib. |
| Current |
multimeter |
Fluke |
77 Series II |
1 to 4 digits |
1% to 5% |
calibration |
| Resistance |
multimeter |
Micronta |
22-167 |
1 to 4 digits |
1% to 3% |
extra resistance, calib. |
| Capacitance |
capacitance meter |
BK |
81 0B |
1 to 3 digits |
5% to 15% |
calibration |
| Inductance |
LCR meter |
BK |
875 A |
1 to 3 digits |
5% to 15% |
calibration |
| Friction |
Air supply/ track |
Pasco |
SF-9216 |
|
|
Uneven legs |
| Freefall Time |
Tape Timer |
Pasco |
ME-9283 |
40 Hz |
0.1% |
obstruction to fall |
| Time/dist |
Spark generator |
Daedalon |
EA-50 |
60 Hz |
|
wrinkled paper, spin on inelastic |
| Resistance |
Decade resistor |
General Radio Co. |
1432-N, 1432-A, 1432-J |
|
|
calibration |
| Resistance |
Resistance substitution box |
Heath |
EUW-28 |
7 Ohms |
10% |
calibration |
| Inductance |
Decade inductor |
Wide Range Electronics |
ALD-12 |
1 mH |
|
calibration |
| Mag. Field |
Hall Probe / Gauss / Tesla Meter |
FW Bell |
5070 |
0.1 G, 0.01 mT |
"+/- 2% DC +/-3.5% AC |
calibration |
| Functions |
2 MHz sweep function generator |
Instek |
FG-8016G |
0.1 Hz |
5% |
calibration |
|
|
