国产精品免费精品视频

FEATURES

AC/DC Output                                          
Wide Range - 1 Millivolt to 1100 Volts,         
      1 Microampere to 5 Amperes
High Accuracy
Ease of Operation
High Stability
Direct Reading Percent Deviation of
      Output Control
High Burden and Compliance Ratings
Short Circuit and Overburden Protection
Continuous Resolution Run-up for Analog Meter Friction Testing
Compact Size for Ease of Portability and Minimum Bench Space
      Requirements
Rapid Warm-up

APPLICATIONS

Calibration of:	Designed for use in:
Analog Panel Meters	Production Line Testing
Portable Volt-Amp Multimeters	Laboratory Calibration
3 1/2 Digit Panel Meters	Field Calibration Service
Transducers	Plant Calibration
Recorders

DESCRIPTION

 

SPECIFICATIONS

OUTPUT SPECIFICATIONS

ACCURACY

GENERAL

Total Harmonic Distortion

Less than 0.3% at full-scale.

Ripple （Dc Operation Only）

Less than 1 % rms at full-scale with 1 MW load.

Internal Frequency Source

Frequencies:	50, 60, and 400 Hz.
Accuracy:	50 and 400 Hz: 眑 % 60 Hz: ?.5%

External Frequency Input

Frequency Limits:	50 to 440 Hz.
Input Voltage	3 volts maximum

% Deviation Control

Range:	?% of setting, adjustable via front panel control.
Accuracy:	眑 /2 division （0.05%）.

Warm-Up Time

Less than 3 minutes at room temperature.

Operating Temperature

+18癈 to+28癈 （+65癋 to+82癋） for rated accuracy; the Model 828 may be operated from 癈 to +1 8癈 （+32癋 to +65癋） and +28癈 and +50癈 （+82癋 to +122癋） at derated specifications.

Input Power Requirements

Standard:	115 V Operation: 104 to 127 volts, 47 to 63 Hz, 45 watts 230 V Operation: 207 to 253 volts, 47 to 63 Hz, 45 watts
Optional:	100 V Operation: 90 to 110 volts, 47 to 63 Hz, 45 watts 200 V Operation: 1 80 to 220 volts, 47 to 63 Hz, 45 watts

Dimensions

Height:	1 9 cm （71/2 inches）
Width:	21.6 cm （81/2 inches）
Depth:	33 cm （13 inches）

Weight:

25 lbs （11.3 kg）

 

High burden capability is achieved by a rating of 10VA on the higher voltage ranges and a rating of 5VA on the one volt range. Compliance of the current ranges is 5V except for the 10A range where it is 1V.

The percent error of a meter under test may be quickly determined and directly read by use of the Model 828's Percent Error control. Analog meters may be tested for "sticky" movements by use of the run-up mode which allows voltage or current to be smoothly and continuously applied to the meter under test.

The calibrator supplies voltage and current at dc and at internally generated frequencies of 50, 60 and 400 Hz. Low ripple on dc functions and low distortion in ac modes minimizes random error when calibrating digital and rectifier type instruments. It is protected against accidental short circuit or overburdening of the output by internal sense circuitry which removes the output voltage or current if the load ratings are exceeded.

High output stability makes this instrument suitable for use as a constant current or constant voltage source.

The Model 828 Current-Voltage Calibrator   is a compact, self-regulating instrument capable of meeting a high percentage of calibration requirements for laboratory, production line and field use. A minimum number of controls assure ease of operation for all grades of personnel. Output voltage and current are set by fingertip operation of a centrally located digital readout  /selector control. Setting time is less than 1.5 second. Voltage Calibrator output is covered in four ranges: 1V, 10V, 100V and 1000V with * over-range on the three lower ranges and 10% over-range on the 1000V range. Current Calibrator output is supplied in five full-scale ranges of 1, 10, 100mA and 1 and 10A. Over-range is * on all ranges except the 10A range where maximum output is 5A.