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Related Manuals for Krohn-Hite 511
Summary of Contents for Krohn-Hite 511
- Page 1 Model 511 10 ppm Precision DC Source/ Calibrator Operating Manual.
- Page 3 Information furnished in this manual is believed to be accurate and reliable. However, no responsibility is assumed by Krohn-Hite Corporation for its use; nor for any infringements of patents or other rights of third parties which may result from its use.
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Page 5: Table Of Contents
General Description and Specifications..............1-1 1-1. Introduction ....................1-1 1-2. Description ....................1-1 1-3. Safety Information..................1-2 1-4. Krohn-Hite Contact Information ............... 1-3 1-5. Factory Calibration..................1-3 1-6. Specifications .................... 1-4 1-7. Output Specifications ................1-4 1-8. Secondary Performance Specifications ..........1-4 1-9. - Page 6 Model 511 Operating Manual List of Illustrations Section Title Page Operation ........................2-1. 511 Front Panel View.................2-2 2-2. Front Output Terminals ................2-3 2-3. 511 Rear Panel View..................2-4 2-4. 120 Volt Line Setting Example ..............2-4 2-5. Power Entry Module Exploded View ............2-6 2-6.
- Page 7 This manual provides the user with the information needed to operate the Krohn-Hite Model 511. Section 3 is a procedure used to verify that the DC Calibrator is within the published specifications. Calibration information is included in the Krohn-Hite Model 511 Calibration manual.
- Page 8 Operating Manual Safety Information The Model 511 has been designed, tested and supplied in a safe condition. The following general safety precautions must be observed during all phases of operation, service, and repair. Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design, manufacture and intended use of this instrument.
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Page 9: General Description And Specifications
Because of the danger of introducing additional hazards, do not install substitute parts or perform any unauthorized modifications. Use only the replacement fuse(s) listed in this manual. Return the unit to the Krohn-Hite Service Department to modify or repair the instrument to ensure that safety features are maintained. -
Page 10: Specifications
Model 511 Operating Manual Specifications Prior to shipment, the Model 511 calibrators are calibrated and data is recorded to guarantee that the unit is operating with-in specifications. Output Specifications listed below are absolute accuracies and are traceability to N.I.S.T. Output Specifications The output uncertainty specifications apply after a one hour warm-up under standard reference conditions of 23ºC ±... -
Page 11: General Specifications
General Description and Specifications Secondary Performance Specifications Output Impedance: 10 µΩ. Line Regulation: ± (1ppm of range +1 µV) for a ± 10 % line fluctuation. Load Regulation: ± 1µV no load to full load. Settling Time: < than 100ms to settle to within 5ppm of final value. General Specifications Calibration Interval: 1 year for 10ppm accuracy. -
Page 12: Options
Part No. EW511 provides an additional one year to the standard warranty 1-10 Options Rack Mount Kit: Part number RK-314 permits installation of the model 511 into a standard 19" rack. Rear Output Terminals: Option 003 provides both front and rear output terminals. Note that only one set of output terminals may be used at one time. -
Page 13: Operation
Section 2 Operation Introduction This section describes the basic operation of the Model 511. It includes the proper ac power requirements along with details of all operating modes and any special features. . ----- Warning ----- The chassis of this instrument is connected to ground. For safety purposes, connect the line cord to a grounded 3-terminal ac outlet. -
Page 14: Power Requirements
Operating Manual Power Requirements The Model 511 is designed to operate from a single phase, 50-60Hz ac power source of 105V-132V or 210V-250V. The ac Power Entry Module, located on the rear panel, contains the main line fuse, an input line voltage selector, and an EMI filter. A detachable, 3-wire line cord is provided with the instrument. -
Page 15: Front Panel Indicators
2-4-2 Front Panel Indicators Power On Indicator: The Green led is on whenever the 511 is plugged into an AC power source and the power switch is in the on position. Decimal Point Indicators: A "floating" decimal point is illuminated by several yellow LEDs and properly locates the decimal point for the range indicated. -
Page 16: Rear Panel
(100V, 120V, 220V or 240V). Notice that a pin will be in one of these holes, indicating the present voltage setting for the 511. If this setting does not match the voltage available at your site, then it must be changed before powering on the 511. - Page 17 Operation Power Entry Module Set the 511 power switch to OFF. Unplug the power cord from the ac wall outlet and from the power cord receptacle on the power entry module. Refer to Figure 2-5 on the next page. Using a small flat blade screwdriver or similar tool inserted into the slot at the left edge of the cover, carefully pry the cover off the fuse cavity.
- Page 18 Model 511 Operating Manual Figure 2.5 Power Entry Module...
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Page 19: Optional Output Terminals
Operation Optional Output terminals 2-5-2 Optional Output Terminals Rear Panel Connections: A factory installed option, there are five terminals located on the rear panel. The configuration is the same as the front panel terminals. Figure 2.6 below shows the connections. NOTE: Only one set of output terminals may be used at one time. - Page 20 Model 511 Operating Manual Notes:...
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Page 21: Incoming Acceptance
Incoming Acceptance Introduction The following procedure should be used to verify that the Model 511 is operating properly. These checks may be used for incoming acceptance and periodic performance checks. Test should be made with the covers in place and after a one hour warm-up under standard reference conditions of 23ºC ±... -
Page 22: Warm-Up Procedure
Perform your verification measurements in a test environment that has a stable ambient room temperature with a relative humidity of less than 70% unless noted otherwise. The Model 511 requires a power line voltage of 100V, 120V, 220V, 240V, ±10% with a line frequency of 50Hz to 400Hz Allow the minimum warm up time for all test equipment. -
Page 23: Optional Tests
Connect the DC voltmeter to the sense and output junction on the Power Load Resistor box. Set the 511 to 4-wire mode and connect the load box to the 511 with two 2-wire twisted pair cables. The 511 sense and output terminals must be connected at the load box. - Page 24 Model 511 Operating Manual Output Noise Test KH uses the following procedure to measure the noise levels of the voltage calibrator. Techniques are employed to minimize external ground loops and radiation paths that may introduce improper data into the desired measurements. "Rule of Thumb": If the measurement indicates more than 1 millivolt p-p of noise on any KH instrument, the operator should recheck his equipment, cables and connections.
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Page 25: Noise Check Setup
Set the differential pre-amplifier upper frequency cutoff to100kHz and the lower cutoff to 0.1Hz. Set the model 511 “sense” switch to the “2-Wire” position and the output to zero. Connect the output of the pre-amplifier to the input of the true rms voltmeter. Observe that ripple and noise do not exceed specifications on each of the ranges. - Page 26 Model 511 Operating Manual Notes:...
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