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The analog side is then in the condition to start ‘ramping down’. Make links TL1 to TL4 if cut. A complete program listing for the same calibration operation assuming an HP controller is as follows: 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.
Personal contact with these points may result in injury. Filter is selected and F. It describes the use of ‘Spec’ mode to verify the accuracy of the instrument, also providing a report sheet ‘master copy’ for compilation of permanent records.
Short together pins ‘D’ and ‘E’ on Digital assembly. The outputs of M39 -Ml and Control of the multiplexer is derived from the Digital volts supply the defined current for the reference assembly via opto-isolators M4, M5 and M6. The technique used in the Autocal Voltmeter is a quadruple slope, the two extra slopes being towards the end of the signal and reference integration periods respectively.
When AC volts is selected the compensation inform- ation for a particular range is recalled by the micropro- cessor, transferred across the isolation barrier and latched on to Ml 3, M14 Drawing No. The delay counters proceed to count down to zero, at which time the delay latch M26 is clocked. Since the current in R is controlled to be constant by Q30, referenced to D50, the current flowing through R is reduced. Turn rear panel key switch to CAL. Ml 5 and Ml 7 switch the time constants, extending the overall low-frequency response down to 10Hz See Fig.
The centre tap digital common is linked directly to line ground via LK6. Potent- iometer R50 balances the rectifier to provide the same output for non-inverted or inverted asymmetric waveforms.
DATRON 1061 Digital Multimeter
This signal contains about mV peak-to-peak high frequency noise. Dll, with a high imped- ance, thus ensuring that the varicap is not shunted to ground. The trigger source is selected by the latched data on M12, enabling one of the three gates of M2.
Do dateon set filter in. On each range a ‘Zero’ and ‘Gain’ calibration is required for each polarity of input. Email to friends Share on Facebook – opens in dafron new window or tab Share on Twitter – opens in a new window or tab Share on Pinterest – opens in a new window or 1061aa. If necessary change C81 to a value which permits this adjustment.
Sign in for more lists. An example of calibration with the Bus is given in the table below. Then after recording the TLH voltage, refer to Fig. As long as the error is small referred to reference 0, dstron DVM will read the correct resistance. Email to friends Share on Facebook – opens in a new window or tab Share on Twitter – opens in a new window or tab Share on Pinterest – opens in a new window or tab Add to Watch list.
Apply IV 50kHz and adjust C63 for a display of 1. This regulator is capable of 1 amp output and has foldback current limiting and thermal shut-down, to provide short circuit protection.
To ensure stability at the higher feedback levels required for dtron 10V, V, and V ranges; C73 is switched in by Q32 to decouple M22 non-inverting input, further reducing the open loop gain.
Full text of “Datron: Datron a Service Manual complete with schematics and partlist”
Sheet 2 gives tables of the coding on the input control lines from the Analog Interface. Turn the calibration key back to RUN mode. When kf2’s is selected, sheet 2 is turned on enabling astable M6 to produce a Hz signal to switch M5. The spline is tight and intact, but is 101a little busted up.
The output from the latches is applied to a digital-to- analog converter, AN2. In REF 2 the offset reduces by a factor of 16 giving the null reference point. The Analog Interface receives data from the Digital assembly to control the selection, range scaling and other features of the analog dateon.
Amendment sheets precisely matched to your instrument serial number are available on request. IV range as described in Section 3. On each range just a ‘Zero’, ‘Gain’ and ‘AcHf’ calibration is required. Thus the difference between input signal and power supply around the input stage is maintained constant whatever the input signal. This causes the sequencer to step on once more from M, the low to high edge from pin 4 disabling the primary counter.
DATRON Digital Multimeter | eBay
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 satron. B Test 21 3. The resulting voltage output from the DC Isolator is applied to the A-D converter, measured and compared to the stored value. The ‘cal’ legend will be displayed on the front panel. Both lA lines then return high.