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New Product: 1394A-0.25:
Specifications:

Voltage Range: 0.1 to 0.25V, usable to 50 mV

Frequency Range: 20 Hz to 10 MHz, usable from 5 Hz to 30 MHz

Calibration Uncertainty

Frequency (Hz)
Calibration Uncertainty
20-50 40 ppm
50-20 k 25 ppm
20 k to 50 k 50 ppm
50 k to 100 k 70 ppm
100 k to 1 M 0.01%
1 M to 10 M 0.15%

Input Resistance: 50 ohm, ±3 ohm

Input Capacitance: 5 pf nominal

Thermoelement:
Nominal current: 5 mA
Couple Output: 7 mV ± 20% at nominal current
Nominal Couple Resistance: 30 ohms
DC reversal error: less than 0.05%
Voltage between couple output and heater (ground): nominal not to exceed ± 10 V, absolute max ± 50 V peak.

Product Bulletin January 1997
1620A/1625A

  1. The Transconductance Amplifier (1620A) and the Current Shunt (1625A) are now linear from 100 microAmps through 100 Amps.

  2. Product improvements have been implemented in both of these products to drastically reduce the temperature coefficients (TC) of the 20 Amp and 100 Amp current shunts.

  3. Thirmisters have been added to the shunts to compensate for the already low TC of the shunt material

The material used for the shunts is as near zero TC as possible. However, due to the heat rise that occurs when the high current is passed through the shunt, the value of the shunt could change as much as 3000 PPM from 0 to 100 Amps. Each instrument is subjected to rigorous testing to determine the uncompensated TC of the shunt material. Then a thermal correction circuit is added to reduce the thermal shift to typically less than 100 PPM over the entire operating range.

 

All prices subject to change without notice.  All prices listed are for domestic sales only, please call our offices to confirm price.
9 Saddle Road, Cedar Knolls, NJ 07927 - Tel: 973-984-1900 -  Fax: 973-984-1479 - E-mail: sales@ballantinelabs.com