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GENERAL DESCRIPTION
The Model 522 is a microprocessor controlled
DC Voltage Calibrator and is a highly versatile reference source designed to
meet the needs of today's demanding requirements for accuracy and
stability. The unit's specified accuracies are traceable to the National
Institute of Standards and
Technologies.
APPLICATIONS
The Model 522 is a highly
accurate reference which can be used in a variety of applications such
as: the design, check and calibration of high speed, high resolution analog-to-digital
converters; the
design and certification of high speed data logging and process control systems;
and the calibration of digital voltmeters and multimeters. It may be installed in systems as
an “IMBEDDED
STANDARD” and/or as a simulator. It may also be used for the design, testing,
simulation and
certification of thermocouples, strain gages and transducer instrumentation.
SPECIFICATIONS
VOLTAGE MODE SPECIFICATIONS
|
Range |
Full Scale |
Resolution |
Current |
Zo |
|
100mVdc |
±111.1110mVdc |
100nVdc |
EMF |
20 ohms |
|
10Vdc |
±11.11110Vdc |
10µVdc |
100mAdc |
10 milliohms |
|
100Vdc |
±111.1110Vdc |
100µVdc |
100mAdc |
10 milliohms |
Crowbar – Indicates selected/programmed short
of terminals.
Accuracy (Relative to N.I.S.T. Standards):
The Accuracy statement is based on the “Limit-of-Error” (or “worst-case”) method.
All other specifications noted hereafter, which affect accuracy, e.g.., line,
load, temperature*,
drift changes are included in the accuracy statement.
±(0.002% of setting + 0.0005% of range + 2µV).
Stability: 8 to
24 hours, ±0.00075%; 90 days, ±0.001%; 1 year, ±0.0015%.
Line And Load Regulation: ±0.0005% from no load to full load and/or
for a 10% line fluctuation.
Noise And Ripple (rms): The following specifications are furnished
in detail so the user can have
complete confidence in the results of their tests.
|
Range |
0.1Hz to 100kHz |
|
100mV |
12µVrms |
|
1V (RA-7
Option) |
25µVrms |
|
10V |
35µVrms |
|
100V |
120µVrms |
CURRENT
MODE SPECIFICATIONS
|
Range |
Full Scale |
Resolution |
Accuracy
±(% of setting +nA) |
Voltage Compliance |
|
10mAdc |
±11.11110mAdc |
10nAdc |
0.005 + 50 |
100V (max.) |
|
100mAdc |
±111.1110mAdc |
100nAdc |
0.005 + 200 |
100V (max.) |
Stability: 8hrs,
±0.00075%; 24 hrs, ±0.001%; 90 days, ±0.0015%; One Year, ±0.002%.
Line and Load Regulation: ±0.0005% from short circuit to full
compliance and/or for a 10%
line fluctuation.
GENERAL
SPECIFICATIONS
Switching And Settling Times:
Step changes, 5 milliseconds; range changes, 300 milliseconds.
Isolation:
Power transformer-to-analog
output, 2.5 × 104M ohms, 300pF.
Control logic-to-analog output, optically isolated, 109
ohms, 130pF, 500Vdc.
Temperature:
Calibration: 23°C ±1°C
Ambient (limit-of-error), 20°C to 30°C
Operating Limit: –10°C to 50°C
Storage: –40°C to 85°C.
Temperature Coefficient: Ambient temperature, ±0.0005%/°C;
operating limit, ±0.001%/°C.
Protection: Voltage mode, short-circuit and over-load protected.
Current mode, open circuit
protected. Indication by display message. Automatic recovery.
MECHANICAL
SPECIFICATIONS
Power Requirements: 50 watts;
115 or 230V ac ±10%, 50Hz-60Hz.
Dimensions: 19" (48.3cm) wide, 3.5" (8.9cm) high, 18" (45.8cm)
deep.
Weight: 14.7 lbs. (6.7kg) net; 23 lbs. (10.5kg) shipping.
TERMINALS
Output Terminals are mounted on both the front
and rear panels. Both terminal sets are configured
for remote sensing of the output as follows:
High Output and High Sense low Output and Low Sense Case Ground.
Rear Connector is mil. spec. type and is the primary location for the
calibration/certification procedure.
The mate is supplied with new instruments.
Front Terminals are five-way binding posts. Mating connectors/cables
are NOT supplied.
PROGRAMMING
Local (Manual): All functions
can be controlled from the front panel.
Remote Control Included: IEEE-488.1 interface. The bus address
is displayed on the front panel display and is selective via a dip-switch.
National Lab-Windows™: Drivers available on request.
Programming of the Model 522 is compatible to programs written for the Krohn-Hite
Models
EDC520 (A series) and the EDC521.
OTHER
FEATURES
True Bipolar Operation
"Crowbar” Setting: A Zero Reference. This is in addition to the usual
active output zero.
Alphanumeric Display
Output Connectors: Monitor Terminals on the front panel. Mil-Spec output
connector on the rear
panel. No terminal switching required when changing ranges.
GENERAL
INFORMATION
Mounting: Rack mounting flanges
are standard with all instruments at no charge. Bench mounting
with removable tilt bale and feet.
Certification: A Certificate of Compliance is issued with each
new instrument to certify the
calibration and traceability to N.I.S.T.
Warranty: ONE FULL YEAR warranty on parts and labor includes
specifications and performance.
OPTIONS
±1.0Vdc Range, Part No. RA-7: Resolution,
1µV; output current, 100mA; accuracy,
±(0.002% of setting + 0.0015% of range + 3µV).
Extended 1 Year Warranty:
Part No. EW522.
Lab Windows Ô
and Lab View Ô drivers
are available for direct downloading from National
Instruments at www.natinst.com.
Note: Drivers for Krohn-Hite Models EDC521 and EDC522 are listed
under “520A”.
OPTIONAL ACCESSORIES
CAB-005:
Cable, Two Conductor Shielded Balance Line
CAB-018:
Cable, Multi-stacking
Double Banana plug
CAB-023:
Cable Set, Low Thermal EMF
Retractable Banana
CAB-024:
Cable Set, Low Thermal EMF Spade
Lug
Specifications and prices are subject
to change without notice.
* The limit-of-error
applies over the standard ambient operating temperature.
Copyright ©
August 01, 2008 Krohn-Hite
Corporation. All rights reserved.
15 Jonathan Drive, Unit 4, Brockton, MA 02301-5566
U.S.A.
Tel: (508) 580-1660; Fax: (508) 583-8989; sales@krohn-hite.com
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