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G8MNY > TECH 19.02.23 10:31l 85 Lines 3846 Bytes #999 (0) @ WW
BID : 40925_GB7CIP
Read: GUEST
Subj: Lab Measuring DMM
Path: IZ3LSV<DB0ERF<DK0WUE<DB0ZAV<CX2SA<N9PMO<KC9UHI<KA1VSC<GB7CIP
Sent: 230219/0916Z @:GB7CIP.#32.GBR.EURO #:40925 [Caterham Surrey GBR]
From: G8MNY@GB7CIP.#32.GBR.EURO
To : TECH@WW
By G8MNY (Corrected Feb 16)
(8 Bit ASCII graphics use code page 437 or 850, Terminal Font)
Years ago I bought a large not working 19" LAB DMM (Datron 1061a). It is an
extremely precise 7.5 digits DMM for its time of 1983. Luckily it came with all
the handbooks & I am pleased to say is quite serviceable now after finding a
silly PCB plug fault.
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Here is part of the exacting specification...
+/- 1.999999 on most ranges with the filtering & averaging options in.
e.g. with a 0.19V input, you can resolve down to ñ100nV or 126dB S/N.
DC VOLTS Input Z ---- Accuracy since last Cal------
Range: 24hr, 90 day, 1 year
100mV >10Gohm ñ10ppm or 0.001%, 30ppm, 45ppm
1 & 10V >10Gohm ñ5ppm or 0.0005%, 20ppm, 30ppm
100V & 1kV >100Mohm ñ10ppm or 0.001%, 30ppm, 45ppm
DC CURRENT ---- Accuracy since last Cal------
Range: 24hr, 90 day, 1 year
0.1-100mA ñ50ppm or 0.005%, 100ppm, 150ppm
1A ñ100ppm or 0.01%, 200ppm, 300ppm
Shunts:100mV drop across all shunts for 100% (reads to ñ199%).
RESISTANCE Test ---- Accuracy since last Cal------
Range: Current 24hr, 90 day, 1 year
10ê 10mA ñ15ppm or 0.0015%, 40ppm, 60ppm
100ê 10mA ñ10ppm or 0.001%, 30ppm, 45ppm
1kê 1mA ñ10pmm or 0,001% 30ppm. 45ppm
10kê 100uA ñ10ppm or 0.001%, 30ppm, 45ppm
100kê 10uA ñ15ppm or 0.0015% 40ppm. 60ppm
1Mê 1uA ñ30ppm or 0.003%, 100ppm, 200ppm
10Mê 100nA ñ150ppm or 0.015%, 300ppm, 500ppm
Measurement is 2 or true 4 wire system & with up to 10ê lead Resistance. And it
also measures in circuit 1 of 3 Rs.
AC RMS VOLTS Input Z ---- Accuracy since last Cal------
Range 24hr, 90 day, 1 year
100mV 1Mohm//150pF ñ0.04% ñ0.08% ñ0.12%
1-100V 1Mohm//150pF ñ0.02% ñ0.04% ñ0.06%
100mV 1Mohm//150pF ñ0.04% ñ0.08% ñ0.12%
Frequency Response flat 10Hz - 1MHz @ -2%
True RMS measurements to 7:1 crest to mean 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 to mean 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 ñ0.01dB.
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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