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Features
Current Mode
Variable Constant DC Current: Two ranges, ±10nA to ±100mAdc
High Resolution: ±0.0001% (1ppm) of both ranges
Minimum selectable setting: 10nA
High Accuracy: (I Mode): ±(0.005% of setting + 0.0005% of range)
Compliance (Power): ±100V (available on both ranges)
Noise: <2µA
Calibration Cycle: 12 months

Voltage Mode
Variable Constant DC Voltage: Three ranges, ±100nV to ±10Vdc.
High Resolution: ±0.0001% (1ppm) on all three ranges
Compliance (Power): ±50mA
Noise: <5µV
“Crowbar” (Zero) Reference.

Options
RK-02: Rack mounting kit for installing the Model CR-103J into
a standard 19" rack.
Extended 1 Year Warranty: Part No. EWCR103.

DESCRIPTION
This instrument is of solid-state, hybrid design with a long history of reliability. The fundamental design is conceptually simple and straightforward (see block diagram). The Model CR-103/J is comprised of two complete instruments. The dc voltage section is an ultra-stable, chopper stabilized amplifier with selectable precision resistors in the feedback loop. The temperature compensated, aged zener diode is the reference for the entire instrument. The dc current section is essentially the same configuration plus a precision, reference resistor. Years of experience, experimentation and testing has produced this fine instrument.

The most important features of these instruments are STABILITY and LOW NOISE!

EVALUATION
We sincerely recommend that you evaluate the performance. EDC instruments must meet not only the published specifications, but they must meet your engineering applications or the instruments may be returned without obligation (complete details upon request).

APPLICATIONS (Current Mode)

• Transducer calibration and simulation 4mA to 20mA and 10mA to 50mAdc ratings.
  (Note the 100V compliance capability).

• Precision Resistance Testing

• Diode Testing and Evaluation

• Relay Threshold Testing

• Testing of semiconductors and Capacitors.

APPLICATIONS (Voltage Mode)

• Thermocouple Systems for Calibration and Simulation

• A/D and D/A Converter Calibration

• Calibration of DVMs, DMMs and Analog Meters

• Linearity and Gain Testing of Amplifiers

• Calibration/Simulation/Testing of Process Control Systems and Data Logging Systems

• Data Logging Systems with applications for: Field Service Departments Design and Development Engineering Departments Quality Assurance and Control Departments

SPECIFICATIONS

CURRENT MODE
All measurements are based on a Standard Resistor – 100 ohms.

Output Accuracy (2 methods relative to N.I.S.T. Standards)

Calibration Accuracy: ±(0.005% of setting + 0.0005% of range). The calibration accuracy is at Standards Reference Conditions at time of calibration. Nominal calibration temperature of 23°C ±1°C at <70% humidity. Nominal line voltage 117Vac at constant external load.

Limit-of-Error Method: ±(0.007% of setting + 0.001% of range. Special note: * Accuracy (limit-of-error or “worst case” method). All peripheral, additive specs, i.e., error for line change, load change, temperature change, drift and noise are included in “Limit-of-Error” and are designated as *NON-ADDITIVE. Normal operating environment 65°F to 85°F, <70% R.H.

Stability (*non-additive): 1hr., ±0.001%; 8hrs., ±0.003%;1yr., ±0.005%.
Ripple and Noise, rms, 0.1Hz to 100kHz: 100mA range, <2µA; 10mA range, <1µA.
Compliance Voltage: 100mA range, 0V to 60Vdc; 10mA range, 0V to 110Vdc.
Load Regulation (*non-additive): 0.001% for 100% compliance change. No load to full load.
Output Conductance: 0.1µS.

VOLTAGE MODE

Calibration Accuracy: ±(0.003% of setting + 0.0005% of range or 3µV). At Standard Reference Conditions (see current mode for definition).
Limit-of-Error Accuracy: ±(0.005% of setting + 0.00075% of range or 3µV). At limit-of-error or “worst case” conditions (see current mode for definitions).
Stability (*non-additive): 1hr., ±0.00075%; 8hrs., ±0.001%;1yr., ±0.005%.
Ripple and Noise, rms, (*non-additive), 0.1Hz to 100kHz: 10V range, 50µV; 1V range, 40µV; 100mV range, 5µV.
Load Regulation (*non-additive): ±0.0005%, no load to full load.
Line Regulation (*non-additive): ±0.0005% for 10% line change.

GENERAL SPECIFICATIONS
Temperature: Calibration, 23°C ±1°C; ambient, 20°C to 30°C; operating limit, –10°C to 50°C; storage,
–40°C to 85°C.
Temperature Coefficient: Ambient, ±0.0005%/°C; operating limit, ±0.001%/°C.
Power Requirements: 30 watts, 50Hz to 400Hz, 105V to 125Vac and 220V to 240Vac.
Dimensions: 5.25" (133.35mm) high, 17" (431.8mm) wide, 10.9" (277mm) deep.
Weight: 12 lbs (5.445kg) net, 18 lbs (8.16kg) shipping.
Circuit Condition Indicator: Front panel indicator illuminates for short-circuit, overload, over-voltage condition, low-line voltage or malfunction.
Protection: Short-circuit, open-circuit and overload protection. Automatic recovery. Over-voltage protection up to 150V.

OPTIONS
RK-02: Rack mounting kit for installing the Model CR-103J into a standard 19" rack.
Extended 1 Year Warranty: Part No. EWCR103.

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.

Copyright © August 01, 2008 Krohn-Hite Corporation. All rights reserved.