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IZ3LSV

[San Dona' di P. JN]

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G8MNY  > TECH     13.06.13 20:16l 84 Lines 3775 Bytes #999 (0) @ WW
BID : 26076_GB7CIP
Read: GUEST
Subj: Lab Measuring DMM
Path: IZ3LSV<IV3YXW<I3XTY<I0OJJ<GB7CIP
Sent: 130613/0930Z @:GB7CIP.#32.GBR.EU #:26076 [Caterham Surrey GBR] $:26076_GB
From: G8MNY@GB7CIP.#32.GBR.EU
To  : TECH@WW

By G8MNY                                      (New Aug 07)
(8 Bit ASCII graphics use code page 437 or 850, Terminal Font)
A few years ago I bought a large not working 19" LAB DMM (Datron 1061a) meter.
It is an extremely precise DMM with 6.5 digits for its time 1983, luckily it
came with all the handbooks & is quite serviceable now. (7.5 dig display)

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Here is part of its exacting specification...

+/- 1.999999 on most ranges with the filtering & averaging in.
    e.g. with 0.19V input, you can resolve down to �100nV or 126dB S/N.

DC VOLTS     Input Z   ---- Accuracy since last Cal------
Range:                     24hr,         90 day,   1 year
100mV        >10G�    �10ppm or 0.001%,   30ppm,    45ppm
1 & 10V      >10G�     �5ppm or 0.0005%,  20ppm,    30ppm
100V & 1kV   >100M�   �10ppm or 0.001%,   30ppm,    45ppm

DC CURRENT             ---- Accuracy since last Cal------
Range:                     24hr,         90 day,   1 year
0.1-100mA              �50ppm or 0.005%, 100ppm,   150ppm
1A                    �100ppm or 0.01%,  200ppm,   300ppm
Shunts:100mV drop across all shunts for 100% (reads to �199%).

RESISTANCE     Test    ---- Accuracy since last Cal------
Range:      Current         24hr,        90 day,   1 year
10�          10mA     �15ppm or 0.0015%,  40ppm,    60ppm
100�         10mA     �10ppm or 0.001%,   30ppm,    45ppm
1k�           1mA     �10pmm or 0,001%    30ppm.    45ppm
10k�         100uA    �10ppm or 0.001%,   30ppm,    45ppm
100k�        10uA     �15ppm or 0.0015%   40ppm.    60ppm
1M�           1uA     �30ppm or 0.003%,  100ppm,   200ppm
10M�        100nA    �150ppm or 0.015%,  300ppm,   500ppm

Measurement is 2 or true 4 wire system & with up to 10� lead Resistance.
Also measures in circuit 1 of 3 Rs.
 
AC RMS VOLTS  Input Z ---- Accuracy since last Cal------
Range                     24hr,      90 day,      1 year
100mV      1M�//150pF    �0.04%      �0.08%       �0.12%
1-100V     1M�//150pF    �0.02%      �0.04%       �0.06%
100mV      1M�//150pF    �0.04%      �0.08%       �0.12%

Response flat 10Hz - 1MHz @ -2%
True RMS measurements to 7:1 crest factor.

AC RMS CURRENT        ---- Accuracy since last Cal------
Range:                    24hr       90 day,      1 year
0.1-1A                    0.1%,       0.2%,        0.3%
Shunts: as DC
True RMS measurements to 3:1 crest factor.

Other features:
 AC+DC True RMS option for Volts & Current as AC ranges.
 Local or seperate screen guard system.
 IEEE interface for automatic readings/logging.
 Go/fail % testing.
 Reading accuracy calculation.
 Direct entry number keyboard.
 dB calculation/readings on all ranges to �0.01dB.
 Pre use calibrated self check.
 Security key locked calibration, easy press button cal features.


See my tech bul on "Measuring 1 of 3 Rs"

Why Don't U send an interesting bul?

73 De John, G8MNY @ GB7CIP


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