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Model 323 Wideband True RMS AC Voltmeter


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Product Summary323.jpg (13930 bytes)

The Ballantine 323 True RMS analog ac voltmeter uses advanced true rms circuitry to achieve square law response from rugged, fast responding silicon diode detectors with no thermal lag and overload vulnerability inherent in thermocouple devices.

These true rms meters respond to the equivalent heating power of the waveform being measured, yielding accurate readings for signals from pure sine waves to complex waveshapes such as distorted sines, squarewaves, pulses, noise, switching power supplies signals, and more. Also, when used with instrument shunts, the 323 provides true rms current measurements on non-sinusoidal waveforms.

Using a Ballantine proprietary suppressed-zero logarithmic voltage scale (linear dB scale), the 323 provides constant reading accuracy from end to end, as well as increased resolution and readability.


Product Features

bulletTrue RMS Response, including harmonics & crest factors to 21
bulletVoltage range:  300 V to 300 V full scale, 1% basic accuracy
bulletSuperior input flexibility
bulletSelectable floating or grounded operation
bulletFrequency range:  2 Hz to 25 MHz, usable from 1 Hz to 75 MHz
bulletFull field portability, AC mains powered, optional rechargeable battery
bulletFastest response without thermal lag or delicate thermocouples


Product Specifications

Model

323-06

323-07

323-20

323-21

Voltage Range

300V to 300 V
(300 V Full Scale in METER + 10 dB Mode)

Calibration

True rms (effective heating value) of input waveform

Min. - Max. Scale Indication

100 V to 330 V

Decibel Range

-78 dBm to +52 dBM
(0 dBm = 1 mW/600
W)

-80 dB to + 50 dB
(0 dB = 1 Volt)

Frequency Range

2 Hz to 25 MHz
(Usable 1 Hz to 75 MHz)

Scale Calibrations

Log Voltage: .095 to .33 and .3 to 1.06
Linear dB: -8.2 to +2.6

Log Voltage: .095 to .33 and .3 to 1.06
Linear dB: 0 to 10

Accuracy

(in percent of reading at reference conditions. Limited to 108 Volts-Hz)

12 Basic Ranges Accuracy
2 Hz to 5 Hz 10%
5 Hz to 20 Hz 5%
20 Hz to 50 Hz 3%
50 Hz to 1 MHz 1% F.S. or 2% rdg*
1 MHz to 10 MHz 2%
10 MHz to 15 MHz 3%
15 MHz to 20 MHz 5%
20 MHz to 25 MHz 8% F.S. or 10% rdg*
+ 10 dB Range Accuracy
5 Hz to 10 Hz 10%
10 Hz to 20 Hz 5%
20 Hz to 2 MHz 3%
2 MHz to 10 MHz 5%

Crest Factor

10 at 0.7 Full Scale, 7 at Full Scale, increasing to 21 at 1/3 Full Scale, except as limited by maximum input of 330 V rms sinewave or 465 V pk.

Noise

< 30 V (input terminated with 50Ω ). Noise adds to signal as the square root of the sum of the squares.

Input Impedance

Signal High to Low, 2 MΩ || 15 pF, ranges above 30 mV; 2 MΩ || 25 pF, ranges 1 mV to 30mV. Signal Low to Case ground, > 40 MΩ || 400 pF.

Input Terminal

BNC, floating or grounded with respect to chassis. Convertible to floating or grounded 3/4-inch spaced banana jack binding posts with supplied Model 618 adapter.

Overvoltage Protection

500 V (dc + pk ac) all ranges to 1 kHz. Ranges above 30 mV, limited to 10Ranges 30 8 V-Hz. mV and below limited to 107 V-Hz.

Common Mode Rejection Ratio

> 120 dB @ dc. > 80 dB at 60 Hz.

Meter Response

Front panel meter time constant control provides selectable meter responses of 0.25 sec for input frequencies above 100 Hz; 0.5 sec for frequencies above 40 Hz; 5 sec for frequencies from 2 Hz to 40 Hz.

AC to DC Converter Output

Positive 1 V dc at full scale, to 0.1 V at bottom scale any range. Accuracy 1% full scale. Output available simultaneously with meter indications. Output proportional to mean square of input signal.

Reference Conditions

24 2 C, 80% RH, ac mains 117 V 2%, mains frequency 50 to 420 Hz, warm-up 1 hr. Temperature coefficient typically 0.1% per C from 15 to 30C and 0.2% per C from 0 to 10C and 30 to 40C.

Power

323-06, 323-20 ac mains or internal rechargeable NiCad by front panel switch, 10 W max. Battery operating time 40 hrs.

323-07, 323-21, ac mains only, 10 W max.

ac: 103 to 132V, 206 to 264 V, 50 to 420 Hz

Environmental

Operating Temperature: 0 C to 40 C
Nonoperating Temperature: -40 C to 75 C
Humidity: 0 to 80% RH to 40 C, non-condensing
Operating Altitude:0 to 3 km
Nonoperating Altitude: 0 to 15 km

Size & Weight

H-155 mm (6.1") x W-198 mm (7.8")x D-259 mm (10.2")
Net: 3.4 kg (7.5 lbs), with battery 4.3 kg (9.5 lbs)
Shipping: 5.4 kg (12 lbs), with battery 6.3 (14 lbs)

          



Product Ordering Information

Model Description
323-06 AC and internal battery
0 dBm=1mW/600
, 2 Hz to 25 MHz.
 
323-07 323-06 less internal battery  
323-20 AC and internal battery
0 dBm=1mW/1000
, 2 Hz to 25MHz
 
323-21 323-20 less internal battery  
options    
323-xxM40 Extended operating temperature range  
Accessories    
618 Adapter, BNC to single binding post  
800A Rack mount kit, mounts 1 or 2 units  
89-10228-1 Half rack cover for 800A  




 
          


Revised: January 29, 2013.

All prices subject to change without notice.  All prices listed are for domestic sales only, please call our offices to confirm price.
312 Old Allerton Road, Annandale, NJ 08801 - Tel: 908-713-7742 -  Fax: 908-713-7743 - E-mail: sales@ballantinelabs.com