Guildline 7620 Wide Band Transconductance Amplifier - CALIBRATED!

Guildline

$16,990.00

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SKU:: 352452845610
Condition:: Refurbished
Brand:: Guildline
Model:: 7620
MPN:: 7620

Guildline 7620 Wide Band Transconductance Amplifier - CALIBRATED!

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Seller refurbished

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We buy, sell and rent general purpose, optical and RF test and measurement equipment. We pay top dollar for your unwanted, surplus or defective gear. Let us make you an offer on your new or used Agilent, Tektronix, Anritsu, Fluke, Rohde & Schwarz and IFR instruments.

Guildline 7620 Wide Band Transconductance Amplifier - CALIBRATED!

Item Description

Guildline 7620 Wide Band Transconductance Amplifier

You are bidding on a Guildline 7620 Wide Band Transconductance Amplifier which is currently sold by Guildline for just under 40K! It was just calibrated in August 2013 and will come with a fresh certificate of calibration with full test data. The Guildline Model 7620 is a very wide band transconductance amplifier. By connecting the output from a stable voltage source to the 7620, it is capable of producing outputs up to 20 amps over a specified frequency range of DC to 100 kHz, and a usable frequency range extending to 1 MHz.

The 7620 provides the capability of calibrating any device requiring a known stable source of current up to 20 amps, such as current shunts and current meters. The transconductance amplifier has been designed to satisfy a growing need for AC current measurement of power harmonics in power distribution systems.

The output of the 7620 uses a unique patented multi cell array, developed at The National Institute of Standards and Technology (NIST). This output array is extremely stable, with a zero drift of less than 50 ppm/hour at 20 amps at 30 kHz.

The 7620 offers an impressive 10 volts output compliance voltage at D.C. and low frequencies, reducing to 5 volts at 100 kHz. A front panel display indicates the compliance voltage existing at the output at all times. Three compliance LEDs indicate the operating output current and frequency band in use.

The 7620 is intended to calibrate devices requiring a known stable source of current up to 20 amps.

Input errors have been eliminated by providing the unit with a four terminal input. This enables the 7620 to be easily connected to most accurate 4-wire sensing voltage sources.

One of the main sources of error in making current measurements is the leakage between the HI and LO terminals of the current source. To alleviate this condition, the 7620 has a driven output guard which provides a buffered signal whose potential follows that of the output HI.

The 7620 is fully programmable over the IEEE 488 General Purpose Interface Bus. The Bus address is selectable from the rear panel, and all front panel controls can be duplicated over the Bus with the exception of power on/off.

A sophisticated overload detection system is implemented on the unit to control and indicate when the 7620 is operating within its specified limits. It is also possible to operate the unit outside the specification but within its safe limits by disabling part of the protection system. In this case, information is still provided to the front panel and over the Bus as the status of the instrument.

Features:

-Stability < 10 ppm/hour @ 30 kHz

-Ranges, (6) 200 µA to 20 A

-Frequency DC to 1 MHz

-Compliance 10 volts

-Guarded output

-IEEE 488 Interface

-Over voltage & over current protection

This unit is in excellent condition, has been fully tested and is guaranteed functional. It comes w/ a 14 day right of return should it not perform to your expectations. Please review pics and text carefully before bidding to verify accuracy of description. If you don't see it in the pictures, it is not included.

Insurance is included in UPS shipping charges. Item shipped internationally on buyer's UPS, FEDEX or DHL accounts only.

We will accept payment for this item by company check, cashier’s check and wire transfer only.

Feel free to send any questions regarding this item to:

(in fact I encourage you to do so)

If you have zero feedback, contact us prior to purchase so we know you are a serious bidder. Otherwise, we may cancel your bid before the auction closes. It should be obvious that you should only bid if you are serious and do intend to complete the transaction. Any stated warranty will be voided if the unit is opened or if any calibration or lockout stickers have been tampered with or removed.

Please note that shipping and insurance costs are non-refundable.

Our feedback is very important to us and we strive for 100% positive on every transaction. If you are unsatisfied with any aspect of your transaction, please contact us before leaving negative or neutral feedback so that we can address and remedy the issue immediately. Additionally, we are always happy to leave positive feedback for our trading partners after a successful transaction.

Make sure that you check out my other auctions for great deals on other test and measurement equipment.

Thank you and good luck bidding.

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Need your unit calibrated by an ISO 17025 accredited lab prior to shipment? Not a problem. We work with numerous calibration and repair companies that can provide your required service at competitive prices.