Model 7410
AC Voltage Reference
A Calculable, Transportable AC Reference Traceable to DC Voltage Standards
G uildline Model 7410 AC Voltage Reference is a digitally
synthesized AC voltage source. It provides 16 Multiple
waveform shapes at 16 different frequencies, and at 5 different
voltage levels.
Precision waveforms stored in non-volatile memory are
generated using new technology developed at The National
Institute of Standards and Technology (NIST). The model 7410
utilizes two Digital to Analogue Converters (DACs) to generate
extremely stable AC Analogue waveforms at frequencies of up
to 156.25 kHz. Up to 512 DC steps are used to generate the
output waveform.
In operation, data stored in the non-volatile memory for a
given waveform is sent alternatively to each of the two DACs.
One DAC is set using bytes on all even addresses, while the
other is set using all odd addresses. The output of each DAC is
time-multiplexed to the output amplifier so that the output of
the first DAC is being used to drive the output, while the
output of the second DAC is being changed to its pre-
programmed next step. By multiplexing the two DACs in this
manner, step noise is reduced, resulting in the highest
accuracy/stability RMS voltage commercially available.
7410 FEATURES
The 7410 is a precision AC Reference thatcan be
> Precision AC Reference referenced directly to DC voltage standards.
> Calibration referenced to DC SOURCE
Versatility designed into this innovative AC Voltage Reference
> 16 different frequencies enables the use of an external 10V DC Solid State Reference as
> 16 selectable waveforms the DC reference for the DACs, instead of the 7410's own
internal 10V DC Reference.
> External sensing
An optional Attenuator Guildline model 74101, has been
> Voltage range 1 mV to 7.07 V designed for those applications and requirements where a
lower output is needed. The ranges provided are 1mV, 10mV,
> 100mA Output Current 100mV and 1V. This expands the range of use for the 7410 AC
> Thermal converter calibration Voltage Reference significantly.
> Ease of use Calibration of the 7410 AC Voltage Reference is easily
accomplished utilizing a precision DC Voltmeter and a
computer.
The standard equipment software supplied enables fast and
efficient calibration of the instrument.
After calibration, the typical total stability of the 7.07 RMS
output is better than 15 ppm over the frequency range
0.1 Hz to 15 kHz.
The 7410 is based on the original work performed at the
National Institute of Standards and Technology, (NIST)
CompuMess Elektronik GmbH · Lise-Meitner-Str.1 · 85716 Unterschleissheim
Tel 089-321501-0 · Fax 089-321501-11 · www.compumess.de · www.netzteile.de
7410 AC Voltage Reference
7410 Specifications
Output Uncertainty (24 hrs) @ 23 0C ± 5 0C, Nominal Output 7.07V RMS
Number Of Uncertainty of Nominal Output
Steps in (7.07 VRms) 24 Hrs, 23 ± 5 ºC
Waveform Frequency Range (Hz)
0.1 1 10 100 1k 10k 20k 40k 80k 156k
512 10 10 10 10 10 80 200 - - -
256 10 10 10 10 10 50 80 200 - -
128 10 10 10 10 10 15 20 50 200 -
64 10 10 10 10 10 50 80 200 2000 1%
Absolute uncertainty, traceability to National Standards, is dependant on the absolute uncertainty of the DC Reference and the digital
voltmeter used to step calibrate the 7410.
Frequency Range 1.16mHz to 156.25kHz
Switch Frequencies 1.16mHz; 1.2, 2.3, 4.8, 9.5, 19.1, 39.1, 76.3, 156.6, 305.2, 610.3Hz; 1.22, 2.44, 4.88, 9.76, 19.53kHz.
(512 step waveform)
Waveforms Sine 512, 256, 128, 64 steps
Ramp 512 steps
Chopped Sine 45o & 90o firing angle
Sine with Pulse crest factor 8, 5, & 3
Sine with 40% 2 nd Harmonic - 0o & 90o
Sine with 40% 3rd Harmonic - 0o , 90o, 180o & 270o
Attenuator, (optional) 1V, 100mV, 10mV and 1mV
Note: Slight degradation in performance may occur when using the attenuator.
7410 Ordering Information
7410 AC Voltage Reference
TM7410 Technical Manual (included)
Certificate of Calibration (included)
Report of Calibration (extra charge)
Accessories:
74101 Attenuator
GENERAL SPECIFICATIONS GUILDLINE IS DISTRIBUTED BY:
Environment Operating 18 0 C to 28 0 C < 50% RH
Non Operating -20 0 C to 60 0 C, 15 to 80% RH
Voltage 100, 120, 220, 240 ± 10%
Frequency 50/60Hz CompuMess Elektronik GmbH
Consumption 20VA Lise-Meitner-Str.1, 85716 Unterschleissheim
Dimensions H 190 mm (7.5 in.) Tel 089-321501-0 Fax 089-321501-11
http://www.compumess.de oder http://www.netzteile.de
W 223 mm (8.8 in.)
D 500 mm (19.7 in.)
Weight 5.5 KG (12 pounds)
Guildline Instruments Limited
P.O. Box 99
21 Gilroy Street
Smiths Falls, Ontario Canada K7A 4S9
Phone: (613) 283-3000
FAX: (613) 283-6082
7410 V1.1 Copyright © 2002.08.23 Guildline Instruments Limited. All rights reserved. Subject tochange without notice. Web: www.guildline.ca