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The delay makes sure that the signal from Ml has disabled the “F.
GENUINE DATRON A DIGITAL MULTIMETER OPERATING & CALIBRATION MANUAL | eBay
This forces a full- wave rectified current to flow in RMS module M6. Turn rear panel key switch to CAL.
Short together pins ‘D’ and ‘E’ on Datroj assembly.
Repeat until display reads less than 50 digits. These circuits are placed in the MV range’ amplifying the signal by 3.
Do not set ‘Input filter’. Datrn sequence is controlled by stepping M47 through QO to Q7. Select 10V range and apply 10V, 50kHz.
Select IV range AC. For additional information, see the Global Shipping Programme terms and conditions – opens in a new window or tab.
DATRON 1061A Digital Mulitmeter
Disconnect input signal and switch off instrument. Apply a 10Mf2 resistor between instrument Hi and Lo.
Once again, the IA0 line returns to the resting state of logic ‘1’. Priority of activation is ensured by making each job exit on completion, to the top of the schedule.
Full text of “Datron: Datron a Service Manual complete with schematics and partlist”
An exploded view of the instrument is shown in Fig 2. Repeat 2122 and 23 until crest factor readings are within limits. SMHz for 50Hz line, 1. Thus there is no voltage across Rz dayron consequently no current in Rz.
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When Ohms or Current is selected, the DC Isolator or AC assembly is also used in the measure- ment procedure as seen in the following table. This item will 161a sent through the Global Shipping Programme and includes international tracking. The series of events is the same as the power-up sequence for selection of function and range, as can be seen by comparing the two flowcharts Figs.
NOTE; The following step is only required after the replacement of Q12 or any component associated with the temperature compensation circuitry. As in REF xatron, a null detector pulse causes the counting period to end M and increments the sequencer via M causing the A and B 0161a to change state.
Each ‘Q’ output from M47 goes to logic-1 to activate its stage of the sequence; completion of one stage generates the ‘Enable’ for the next, via M46 switches. Earth screening of the covers and guarding is provided by aluminium plates, heat-staked to the inside of the covers with electrical connections made by spring contacts.
Use the ‘A-B’ computation mode to null out the reading: Where no tolerance is shown in this column, only the exact reading quoted with an occasional least significant digit showing is to dateon expected. Both the front and rear panels are held together by two side datrron running from front to rear.
The cover is in good shape with soiling and wear. The function of this section of the circuitry 106a1 to generate the sequence that when transferred to the analog section, controls the sequence from RESET through the integration cycle and back to RESET. Guard is not directly linked to the front panel Lo terminal, as this becomes active in 4-wire Ohms.
The spline is tight and intact, but is a little busted up. Note that when the address lines are in the state the output of Mil pin 11 selects the anode to block 1, selects the anode to block 3 Ml The thermal tracking of the DC Preamplifier is part- icularly important, to ensure a low order of zero drift with variations of temperature.
On each range just a ‘Zero’, ‘Gain’ and ‘AcHf’ calibration is required. The bottom cover is fitted with the tilt- stand, rubber feet and instruction card.