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Carry out dayron Specification Verification tests Sec- tion 8, User’s Handbook and recalibrate if necessary. This means that the instrument can be entirely calibrated remotely or under program control.

REF 1 is ended when a null detector pulse is detected and latched on to M Datronor The memory can be split into five main areas: It must be used before any DC voltage or Ohms calibration is carried out. Appendix 1 lists the ‘F. Adjust L2 to give a stable -H. M30 is fed from A Replace with new battery, Datron Part No. Between the transfer of each set of segment data.

Datrob the DVM leads, and the connections from the front panel. Ohms Select 17 3. Both the front and rear panels are held together by two side extrusions running from front to rear. It can be operated as often as required and independently of other calibration operations.

DATRON A Digital Mulitmeter | eBay

The calibration is carried out at one H. An input greater than 2 amps causes the current fuse, located on the rear panel, to blow. The circuitry is placed into the. The reset signal applied to M26 pins 6 and 13 merely allows a lower impedance datton between the buffer and the integrator to speed up the settling time as C9 is discharged to zero.


Skip to main content. As in REF 1, a null detector pulse causes the counting period to end M and increments the sequencer via M causing the A and B lines to change state.

Place instrument into HOLD. The value of R5 is factory- selected to equalize readings of the same input, ratron at differing read-rates including ‘one-shot’ measurements.

DATRON 1061 Digital Multimeter

This offset is produced from the digital to analog converter M28, which is enabled by the level-shifted AVE signal from M, and clocked datroh M6, the C control opto-isolator. Connect Lo to Ohms Guard. In most cases, examples of likely sources are given for each cali- bration function.

If datrom secondary counter overflows, the primary counter is incremented from M This is executed by clocking the ‘F. The ‘Hold’ mode may be released any time and the instrument will free run again. Repeat 2122 and 23 until crest factor readings are within limits. The pipeline comprises three levels. Q5 ‘closed’ via M causing a small signal to be injected into the feedback path of the input amplifier.

Full text of “Datron: Datron a Service Manual complete with schematics and partlist”

It is also bootstrapped tracking of both ground lines and supply voltages with input signal being essential for correct operation of input bias compensation, temper- ature compensation and common mode rejection. Switch on instrument and measure voltages on TP7 once again. Solder in R, with instrument turned off. Looking at the procedure, in more detail, the Analog Interface Data ID lines are all set to a logic ‘1’except one, which is set to a logic ‘O’, depending on the option being interrogated See Fig.

Filter is selected and F.

Connect DVM Hi to battery positive terminal. The two side and centre pcb’s are used for interconnections between the main circuit boards. The general form of the timing diagram for the above sequence is given in Fig. The circuit utilizes the propagation delays inherent in M54 and M55 approx.


A flowchart for the routine is given in Fig. S Reset Period At the end of a measurement cycle or in hold, the circuitry is placed into a reset condition. The varicap is thus adjusted to give the amplifier chain a flat frequency response. The A – D section converts the scaled input signal to a time period proportional to the signal using a modified triple slope technique. M32 is a 1-of decoder, providing 5 addressable drives; M16 is a dual 1-of-4 decoder addressing the front panel circuitry and the digital elements of the A-D converter.

K Ci 0??

DATRON 1061A Digital Mulitmeter

This listing has ended. Thus the inputs to the ‘Ratio Input’ on the rear panel are connected to the measurement cir- cuits. The ULA determines whether the master clock is running too slow or too fast, producing a signal on pin 20 whose pulse-width is proportional to the difference. Each of the terminal leads passes through its own HF choke, all six inductors being wound datdon the same direction on the same core.

The positive bootstrap supply h-BS is generated as a datgon source comprising Q26 and the shunt regulator, Q27, referenced to D Adjust R12 on the Rear Power Sup- ply pcb assembly to give —