HP 410C manual Front and Rear Panel Controls 01556-2

Page 16

TM 11-6625-1614-15

Section

III

Model 410C

Figure

3-1

 

1.FUNCTION SELECTOR: This control is used for selecting type of measurement to be made. They are: ±DC Voltage, ±DC Current, AC Voltage, and resistance measurements.

2.AC ZERO: This control provides adjustment for zero-setting the meter before making AC volt- age measurements.

3.MECHANICAL ZERO ADJUST: This adjustment mechanically zero-sets the meter prior to turn- ing on Voltmeter.

4.RANGE: This control selects the full scale meter range.

5.AC POWER SWITCH: This push button - lamp combination, when depressed, turns the instru- ment power on or off. The push button glows when the Voltmeter power is on,

6.DCA-OHMS: This lead is used in conjunction with the COM Lead to measure DC current or ohms. The FUNCTION SELECTOR determines which measurement is made.

7.COM: This lead is used with the input leads for DC voltage current, AC voltage, and resistance

measurements. The COM Lead is normally floating; however, a shorting bar can be con- nected from the floating ground terminal to the chassis ground terminal on the DC AMPLIFIER OUTPUT connector. If a shorting bar is not used, the COM Lead is floating except when the FUNCTION SELECTOR is set to ACV.

8.DCV: This lead is used in conjunction with the COM Lead to measure ±DC voltage.

9.AC PROBE (300V MAX): Receptacle for tele- phone-type plug of Model 11036A AC Probe . With probe connected the Voltmeter may be used to make AC voltage measurements.

10. ADJUST: This control is used to set meter

pointer to before resistance measurements are made. Only periodic adjustment o f this screwdriver adjustment is necessary.

11.LINE VOLTAGE: This two-position slide switch sets the instrument to accept either 115 or 230 volt AC primary power.

12.FUSEHOLDER: The fuseholder contains a 0. 25 ampere slow-blow fuse for both 115 vac and 230 vac modes of operation.

13.AC POW ERCONNECTOR: Accepts power cable supplied with the instrument.

14.DC AMPLIFIER OUTPUT: Provides DC vol- tage output proportional to meter indication for driving external recorder. 1.5 volts DC out- put for full scale meter deflection.

Figure 3-1. Front and Rear Panel Controls

3-2

01556-2

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Contents HEWLETT-PACKARD Electronic Voltmeter Model 410C Exist in this Equipment HEWLETT-PACKARD Electronic Voltmeter List of Tables Number Section Section General Information Page Model 410C Description Model 410C Figures 2-land Section Installation 01556-1 Section Operation Front and Rear Panel Controls 01556-2 Voltage Measurement AT High FRE Pulse MeasurementsPRF Negative PulsesDC Voltage Measurements 01556-3 AC Voltage Measurements Section Model 410C 5 5 6 III Graph Used in Calculation of Pulse Voltage ReadingsResistance Measurements 01556-2 DC Nano-Amoere Current Measurements Section Input Network MODULATOR-DEMODULATORPower Supply Feedback NetworkSection 01556-2 Section Section 01556-2 Section Page BNC Alternate Voltage Source DC Voltmeter Operation Accuracy Check DCVInput Resistance Check DCV Input Resistance Check DCAModel 410C Section Tables 5-3and Ohmmeter Operation Amplifier OperationAmplifier Gain Check DC Amplifter Output Impedance Check AC Voltmeter Operation AC Probe Accuracy CheckAC Voltmeter Accuracy Check AC Voltmeter Frequency Response CheckSET Level Adjustment and Calibration Procedure Chopper Frequency AdjustN C T I O N COMPage C e t h e y a r e w i t h i n AC Full Scale Adjust .5 V Range C Zero AdjustTroubleshooting Procedure D e l 4 1 0 C Troubleshooting Tree 01566-2 Servicing Etched Circuit BoardsChopper Assembly Installation Paragraph Section Model 410C 11. Model 11036A AC Probe Exploded View Change 16.1 Page Section Power Supply Schematic Typical Amplifier Waveforms Page Page Page Harold K. Johnson Page Metric System and Equivalents N 0 1 6 2 8 8 0 0
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