Datasheet

1550A
Vishay Micro-Measurements
Document Number: 11313 [e-mail] www.vishaymg.com
Revision 08-Jun-06 55
Strain Indicator Calibrator
A certificate of calibration is provided with each Model 1550A calibrator
SPECIFICATIONS
Accuracy:
0.025% of setting ±1µε (0.0005mV/V), maximum.
Traceable to United States National Institute of Standards
and Technology.
Repeatability:
±1µε (0.0005mV/V), maximum
Stability:
(0.001% of setting ±1µε)/°C, maximum
Thermal EMF:
0.5µV/V of excitation, maximum
Bridge Resistances:
120Ω and 350Ω
Input Resistance:
±0.05%, maximum, from nominal at all output settings.
Output Resistance:
±0.05%, maximum, from nominal at “000”µε,
-0.25% at ±99 900µε.
Circuit:
True ±ΔR in two adjacent arms (opposite signs), plus two
fixed arms for bridge completion.
Simulation:
Quarter bridge, one active arm.
Half bridge, one or two active arms.
Full bridge, two active arms.
Range:
Two active arms:
0 to ±99 900µε in steps of 100µε @GF = 2.00.
0 to ±49.95mV/V in steps of 0.05mV/V.
One active arm:
0 to ±49 950µε in steps of 50µε @ GF = 2.00.
Excitation:
To meet accuracy and repeatability specifications:
120Ω: up to 10Vdc.
350Ω: up to 15Vdc.
Maximum Permissible:
120Ω: 25V ac or dc.
350Ω: 30V ac or dc.
Output @ 000:
50µε (0.025mV/V), maximum in full-bridge mode.
Environment:
Temperature: +50° to +100°F (+10° to +38°C).
Humidity: up to 70% RH, non-condensing.
Size:
Aluminum case (separable lid):
5-3/4 H x 8-1/4 W x 7-3/4 D in (145 x 210 x 195mm).
Weight:
4.8lb (2.2kg).
All specifications are nominal or typical at +23°C unless
noted.