PPM Instruments - Item # AVM 2000, AVM 2000 Nullmeter/Nano Voltmeter
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All Categories > Metrology and Calibration > AVM 2000 Nullmeter/Nano Voltmeter > Item # AVM 2000  
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Item # AVM 2000 AVM 2000 Nullmeter/Nano Voltmeter

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AVM 2000 Nullmeter/Nano Voltmeter
    The Model AVM-2000 replaces models AVM-100, Fluke 845, Keithley 155 and HP 419.  The AVM-2000 Null-Meter is a calibration laboratory grade Null meter and Nano voltmeter. It can be used as a stand-alone analog voltmeter or in conjunction with Kelvin-Varley dividers and other calibration laboratory equipment where high sensitivity ratio-metric processes are used.

    The AVM-2000 has a very high sensitivity front end amplifier with extremely high common mode rejection making it ideal for comparison/ratio measurements. It is specifically designed for standards comparison and displays readings on an easy to read, dual-scale, mirror-backed meter with null (0) shown at center scale. An isolated, single ended output allows connection to other instrumentation such as chart recorders, data acquisition systems and digital voltmeters. This output also enables the AVM-2000 to be used as a high quality instrumentation amplifier with input impedances ranging from 1 MO to 1 GO, and gains from 10-3 to 108 . Common mode rejection of 80 dB, precision adjustable offset voltages and a wide selection of low pass filters ensure operation over the entire range from 100 nV to 1000 V without compromising resolution or accuracy.

     





Specifications · Inputs and Range · Outputs and Indicators · Offset Current · Connectors · Power Supply · Features

Specifications

Analog Output

± 0.5% of full scale of range selected (typically 0.1%)

Analog Output - Resolution

Within 0.01% of full scale of selected range (after floor noise compensation)

Analog Output - Linearity

Within 0.01% of full scale of selected range

Analog Meter

± 2% of full scale of selected range

Analog Meter - Scaling

Mirrored zero center 10-0-10 and 3-0-3

Analog Meter - Resolution

= 1% of full scale of selected range (typically, 0.5% of full scale of selected range)

Analog Meter - Linearity

= ± 1% of full scale of selected range

Input Impedance (100 nV to 1 mV FS)

1 GO
1 MO
10 MO
100 MO

Input Impedance (3 mV to 300 V FS)

10 MO
100 MO

Input Impedance (1 KV FS)

1000 MO

Filter

10-position digital low pass filter selectable from front panel 100, 200, 500 msec, 1, 2, 5, 10, 20, 50, 100 sec

Offset

Continuously variable (0 to ±999.9% of range) offset for all ranges

Offset - Resolution

= 0.01% full scale

Offset - Accuracy

= ± 0.5% full scale

Series Mode Rejection

> 80 dB at 50 Hz - 60 Hz

Outputs

Isolated yielding ± 0.5 to ± 1.5 V (user adjustable) for full scale deflection

Isolation

Input to case or output > 100 GO (typically > 500 GO)

Overload Protection

1100 VDC or peak on any range

Meter

4 1/2" Mirror Backed with -3-0-+3 and -10-0-+10 Scales

Status

Backlit LCD : Range, Offset, Filter Response Time, Input Impedance, Zero/Operate Mode, Input Offset Mode and Isolated Output Mode

Dimensions (H x W x D)

6.5" x 11.5" x 13.5"

Weight

22.5 lbs.

Environmental Operating Temperature Range

15 - 30ºC Full Specifications

Environmental Operating Humidity Range

0 - 50% RH Full Specifications

Environmental Storage Temperature

-20 to + 60 ºC

Environmental Humidity

0 - 80% Non Condensing


Inputs and Range
  • One set of input terminations for all ranges
  • HI LO & Guard
  • Low end 100 nV full scale deflection with 2 nV resolution
  • High-end range = 1000 V full scale deflection. with 5 V or better resolution
  • 21 selectable ranges, (1-3-10 sequence)




Outputs and Indicators
  • 2 output indications
  • Analog meter
  • Isolated analog rear panel output




Offset Current
  • Adjustable (± 2.5 nA) to zero at front panel
  • Temperature coefficient better than 1 pA per deg C




Connectors
  • Low thermal emf input terminals plus guard
  • Two output Binding Posts, plus a third for case common
  • Input terminal cover




Power Supply
  • Internal rechargeable battery
  • External 7.5 to 30 V DC at 1 Ampere
  • External "Power Cube" included




Features
    Mains Isolation :
    The AVM-2000 may be operated from line power or its internal rechargeable battery (rechargeable with the internal battery charger). Battery operation allows up to 50 hours of total independence and isolation from common mode signals generated through mains and building wiring, minimizing the possibility of errors induced by ground loops and other wiring induced noise

    Easy/Traditional Operation :
    At its heart, the AVM-2000 employs modern digital technology; however to the user it functions as a traditional analog meter. The AVM-2000 incorporates a mirrorbacked, high-accuracy, dual-scale, analog meter display to facilitate use as a Nullmeter. Range is selected by rotating a traditional Range selection knob. All operating modes are pushbutton selected and displayed on an easy to read LCD. Output level, and input offset level are controlled by “press-rotate-press” rotary controls. Settings are held in non volatile memory.

    Indicators :
    A backlit LCD alphanumeric display assists the user in operation and setup of the instrument. It continuously displays the status of the primary selected parameters and mode of operation. The current range setting is shown in large bold numbers to eliminate range reading errors incurred when reading knob position.
    The AVM-2000, utilizing the latest available technology, surpasses all of the specifications of its predecessors. It replaces, and exceeds the performance and functionality of: the PPM model AVM-100 and the discontinued Hewlett Packard HP419A, Fluke 845AB, and Keithley 155.

    Unique Features Include :

    • Scalable rear panel output (± 0.5 - 1.5 Volt for Full Scale)
    • Low Thermal EMF input binding posts (Gold plated Tellurium Copper)
    • Input connector shield for thermal isolation of input terminals
    • Wide range of filter settings (0.1 - 100 sec in 1-2-5 sequence)
    • Analog sub-system in heavy metal guarded enclosure for long term thermal stability




 DOWNLOADS 

 width= AVM-2000 Nullmeter Datasheet
(PDF, 790KB)

 width= AVM-2000 Quick Start Guide
(PDF, 302KB)

 width= AVM-2000 TECHNICAL REFERENCE MANUAL
(PDF, 1934KB)


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PPM, Inc. • 23500 Mercantile Rd., Cleveland, OH 44122 5914 •
Tel: (216) 595-3200  • Fax: (216) 595-3203
Email: info@ppminc.com