Accurate 2 Wire Ohm Measurement: To minimize measurement uncertainties for frequencies below SO Hz and above 20 kHz, the AC Calibrator should be calibrated and its error measure- ment control should be used to adjust out the errors in- dicated on the calibration chart. Set the Test Oscillator for an output of 1 V, 10 kHz. This trigger mode is entered when the in- strument is turned on, when the Internal Trigger button is pressed, or a Device Clear message is remotely sent. To obtain replacement parts, address order or inquiry to your local Hewlett-Packard Field Office.
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Line Voltage Selection Allow about 6 seconds for updating the cal constants, if the 34SSA is in the Hold mode. Tara Oi and Wana-Up. The A Adjustments must be performed in the sequence in which they moseft presented. Tlic use of repaired fuses and the short-circuiting of fuse holders must be avoided. Ohmmeter Mosfef Connections Both ac signals or ac plus dc signals ac signals superimposed on a dc level can be measured by the true RMS convertor.
Full scale output of the Converter Amp- lifier is approximately 1 volt rms for all ranges. NY Table The con- troller is then free to control other instruments on the Bus. Only the system controller can send the Abort message. Set the A controls as follows: Front and Rear Panel Features Cont’dl. Items marked by a dagger t in the reference desig- Table The Model A measures resistance from 1 milliohm to 15 megohms in six ranges extending from.
Hewlett-Packard uses a two-section serial number consisting of a four-digit prefix and a five-digit suffix separated by msfet letter designating the country in which the instrument was manufactured.
In cases where only minor changes are required, 8 change sheet rnay be suttplied. Figure shows proper connections for making resistance measurements. If any auto-cal constants fail, the A will not output any readings, times out.
Detailed Block Diagram 8-H Without disturbing the frequency setting, set the AC Calibrator for an output of Circuit Description In any correspondence, identify the instrument by model number and full serial number.
Each end of the cable has both a male and female connector to simplify interconnection of instruments and cables. Effective common-mode rejection is the ratio of the peak common-mode voltage to the resultant peak er- ror in the reading, with a I kilohm imbalance in the Low input lead.
The com- bined output of the two circuits is a dc level proportional to the rms value of the input signal.
You can do this by connecting the input across the resistor and measuring the voltage drop across the resistor. Detailed Description Downrange the dc standard to 1 V output and turn off the dc standard’s output.
The instrument and man- ual should be reviewed for safety symbols and instructions before operation. The test limits given in the tables for the dc, ac and ohms ac- curacy tests do not include temperature coefficients.
The 34SSA reading should be within test limits listed in Tableverifying its volt full scale accuracy with High Resolution off. These specifications are the performance stan- dards or limits against which the instrument is tested.
Record the A reading:. A separate gain error measurement is not made for the V dc range. Status Bit A single bit of device-dependent status information which may be logically combined with status bn information from other devices by the controller.
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