ESI / Tegam PRT-73 Programmable Ratio Transformer PRT73, 2.5V/Hz, Eight Decades

Description

Standard Description
Description
ESI / Tegam PRT-73 Programmable Ratio Transformer with 2.5 V/Hz Option, 8-decades
The Tegam ESI PRT-73 Automated Precision Ratio Transformer meets or exceeds all of the requirements for a calibration standard in precision measurement applications. It is easily integrated into systems for either automated or manual calibration of ratio dividers, transformer standards, synchro/resolver standards, transformers, calibrators, and voltmeters. The PRT-73 is fully programmable via a standard IEEE-488 interface. Storing calibration procedures in the system controller increases the repeatability of measurements.
This seven decade AC voltage divider gives 0.1 ppm resolution for ratio settings from -0.0010000 to 1.0009999, and terminal linearity of 0.9 ppm. It performs over a wide range of frequencies from 50 Hz to 20 kHz with maximum input voltage of 0.35 V/Hz up to 350 V. For greater flexibility, the Low Frequency Option extends voltage capability to 2.5 V/Hz from 10 Hz to 1 kHz. This option expands ratio measurement capabilities to include 150 V at 60 Hz and adds another transformer, improving resolution to 0.01 ppm.
Specifications
Linearity Error (3-Terminal)
0.35 V/Hz Range
50 Hz to 1.0 kHz:  ±0.9 ppm for settings 0.1 to 1.0000999
2.5 V/Hz Range:
50 Hz to 400 Hz:  ±(1 ppm + 0.9 ppm x Ratio)
400 Hz to 1 kHz:
Multiply 50 Hz to 400 Hz values by factor  of (f/400)
2
, where f = frequency in Hz.
10 Hz to 50 Hz:
Multiply 50 Hz to 400 kHz values by factor of 50/f, where f = frequency in kHz.
Linearity errors are given in parts per million (ppm) of input. Verification of linearity errors is traceable to N.I.S.T. uncertainty of 0.5 ppm of input.
Number of Decades
0.35 V/Hz Range:  Seven.
2.5 V/Hz Range:  Eight.
Resolution
0.35 V/Hz Range:  0.1 ppm of input.
2.5 V/Hz Range:  0.01 ppm of input.
Range
0.35 V/Hz Range:
-0.0010000 to +1.0009999
2.5 V/Hz Range:
-0.00010000 to +1.00009999
Frequency Range
50 Hz to 20 kHz standard range.
10 Hz to 1 kHz (2.5 V/Hz).
Maximum Input Voltage
0.35 V RMS/Hz, 350 V maximum.
2.5 V RMS/Hz.
Input Impedance
0.35 V/Hz Range:
> 40 kΩ, 50 Hz to 1 kHz.
2.5 V/Hz Range:
> 100 kΩ, 10 Hz to 100 Hz.
Above 100 Hz:
100 kΩ decreasing with frequency Applies for inputs > 10 V RMS.
Datasheet available
here
.
The item is in good condition, tested and working.
Shipping Weight (lbs.):
35
Shipping Dimensions (in.):
25 x 25 x 13
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