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Standards Series 1409 Capacitor
USES:
· Reference Standard Reference Standard of Capacitance
· Working Standard Introduction
· Verification of Calibration of LCR Meters The 1409 Standard Capacitors are fixed mica capacitors of very high stability for use as two- or
· Capacitance Measurement Functions three-terminal reference or working standards in the laboratory.
· Verification of Calibration of Multimeters
· For Calibrating Instrumentation Description
Typical capacitors, observed over more than 20 years, have shown random fluctuations of less
than +0.01% in measured capacitance with no evidence of systematic drift.
FEATURES: These capacitor units consist of a silvered-mica and foil pile, spring-held in a heavy metal clamp-
ing structure for mechanical stability. The units are selected for low dissipation factor and are sta-
· Two and Three terminal calibration pro- bilized by heat cycling. They are housed, with silica gel to provide continuous desiccation, in cast
vided aluminum cases, sealed with high-temperature potting wax. A well is provided in the wall of the
case for the insertion of a dial-type thermometer. Three jack-top binding posts are provided on the
· Available in 0.001µF, 0.01µF, 0.1µF, top of the case and removable plugs on the bottom, for convenient parallel connection without
and 1.0µF error.
· +0.01%/year stability
· Calibration accuracy +0.02% Figure 1
Change in capacitance as
a function of frequency for
typical 1409 Capacitors.
The 1-kHz value on the
plot should be used as a
basis of reference in estir-
nating frequency errors.
Figure 2
Dissipation factor as a
function of frequency.
HIPOT · LCR METERS · MEGOHMMETERS · MILLIOHMMETERS · DECADES · STANDARDS
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Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
Series 1409 Capacitor
Calibration: A certificate of calibration is supplied with each capacitor, giving the both two- and three-terminal measured
capacitances at 1kHz and at 23°±1°C. The measured value is the capacitance added when the standard is
plugged directly into the binding posts. This value is obtained by comparison, to a precision better than +/- 0.01%,
with working standards whose absolute values are known to an accuracy typically +/- 0.01%, determined and
maintained in terms of reference standards periodically measured by the National Institute of Standards and
Technology.
Adjustment Accuracy: Within +/- 0.5% of the nominal capacitance value (two terminal) marked on the case.
Stability: Capacitance change is less than 0.01% per year.
Temperature Coefficient of Capacitance:
+35 +/-10ppm / °C between 10°C and 70°C.
Dissipation Factor: Less than 0.0003 at 1kHz and 23° C (See Figure 2)
Measured dissipation factor at 1 kHz is stated in the certificate to an accuracy of +/-0.00005.
Series Inductance: 0.050µH for 1409-F and 1409-L
0.055µH for the 1409-T and 1409-Y
Series Resistance At 1MHz:
0.02 V except for the 1409-Y, which is 0.03V
Frequency Characteristics:
See Figure 1. Series resistance varies as the square root of the frequency for frequencies above
100kHz.
Approximate Terminal Capacitance:
From H Terminal to case (G), 12 to 50pF.
From L Terminal (outside foils of capacitor) to case, 300 to 1300pF.
Leakage Resistance: 5000 ohm-farads or 100G V, whichever is less.
Maximum Voltage: 500V pk up to 10kHz.
Mechanical: Sealed Case.
Dimensions: (w x h x d): 1409-Y: 3.25 x 5.63 x 2.69in (83 x 143 x 69mm)
1409-F: 3.25 x 4 x 2in (83 x 102 x 51mm)
1409-L: 3.25 x 4 x 2in (83 x 102 x 51mm)
1409-T: 3.25 x 4 x 2in (83 x 102 x 51mm)
Weight: 1.25lb (0.6kg) net, 4lb(1.9kg) shipping ; the 1409-Y is heavier by approximately 1lb (0.5kg).
Ordering Information
Reference Standard Capacitor
Catalog Number Item Includes:
1409-9706 1409-F, 0.001µF
1409-9712 1409-L,0.01µF Calibration Certificate Traceable to NIST
1409-9720 1409-T, 0.1µF
1409-9725 1409-Y, 1.0µF
Optional Accessories:
Calibration Data
IET LABS, INC.
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de