ESI TegamSR1050 电路图.pdf

28 534 Main Street, Westbury, NY 11590 IET LABS, INC. in the GenRad T TEL: (516) 334-5959 (800) 899-8438 FAX: (516) 334-5988 SPECIFICATIONS SR-1050 Series ORDERING INFORMATION SR-1050-1M 1 M/Step Resistance Transfer Standard SR-1050-10M 10 M/Step Resistance Transfer Standard OPTIONS - RM Rack mountable case for standard 19 rack SR-1050 Resistance Transfer Standard The Benefits of Using Transfer Standards In order to perform calibrations with a high degree of accuracy, reference standards must be employed at every range or decade of the measur- ing or calibration instrumentation. Clearly, this can be difficult and costly since these standards must be highly stable and their precise values must be known with a high degree of certainty and sufficient resolution. To minimize the cost and difficulty, more practical means of performing such calibrations would be to use transfer standards. If one has a single standard that is calibrated by a national laboratory, one can then compare the transfer standards to the certified standard by ratio techniques. The SR-1050 Series of transfer standards consist of 11 matched resis- tors, of value R, which may be connected in series or parallel combina- tions to produce any number of values such as R/10, R, and 10R, all with the same known deviation, thereby allowing progressive transfers to higher and lower decades. For example, the 1 M transfer standard may be used to transfer calibrations across 100 k, 1 M and 10 M. The SR-1010 and SR-1030 Series of transfer standards may be used for resistances 100 k and under. These transfer standards may also be employed as very precise and stable voltage dividers. Calibration Conditions: 23C, meter guard applied to COMMON and ground applied to G, at low power, traceable to SI. Initial calibration data for each resistor supplied with instrument. Resistance Transfer Standard Make accurate calibrations and transfer measurements over three decades of re- sistance with the SR-1050 Series. Steps from 1 M to 10 M Transfers from 0.1 M to 100 M 11 precisely matched resistors High transfer accuracy - better than 2 ppm SR-1050/06-25-2012 Step Size 1 M10 M Adjustment (Initial)Accuracy 25 ppm30 ppm Transfer (short- term) Accuracy* 2 ppm2 ppm 1-year Stability (ppm/year) 30 ppm30 ppm 2-year Stability (ppm/2 years) 50 ppm50 ppm Temperature Coefficient 5 ppm/C 5 ppm/C Matching (Initial) Adj. Acc.10 ppm10 ppm TC5 ppm5 ppm Calibration Uncertainty 10 ppm10 ppm Leakage Resistance: 10 T from terminal to case. Power Coefficient: <0.05 ppm/mW per resistor. Maximum Applied Input: 2500 V, or 1 W per resistor, whichever limit applies first. Breakdown Voltage: 5000 V peak, between any terminal and case Environmental conditions: Operating: 18C to 28C; 20-50% RH Storage: 0C to 50C, 15-80% RH Dimensions: 35.6 cm W x 16.5 cm H x 10.2 cm D (14 x 6.5 x 4). Weight: 5 kg (11 lb.). Operation: (Switch 0 is left most switch). To set standard to R/10, set Switch 0 down, Switch 1 up, switch 2 down and so on; Switch 11 off. To set standard to 10R, set Switch 0 down, Switch 10 up, all other switches off. To set standard to 1R, set Switches 0 and 6 down, Switches 3 and 9 up, all other switches off. *Short-term accuracy applies for 48 hours within 1C of initial measurement RadioFans.CN 收音机爱 好者资料库