R:190807/0918Z 12933@LU9HGS.CP.COR.ARG.SOAM LinBPQ6.0.18
R:190807/0917Z @:LU4ECL.LP.BA.AR.SOAM #:22399 [22400] FBB7.01.35 alpha $:15028_ R:190807/0908Z 34784@N3HYM.MD.USA.NOAM BPQ6.0.18
R:190807/0916Z 11964@KF5JRV.#NWAR.AR.USA.NA BPQK6.0.18
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R:190807/0916Z 6844@GB7YEW.#79.GBR.EURO LinBPQ6.0.18
R:190807/0913Z @:GB7CIP.#32.GBR.EURO #:15028 [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.

┌─────────────────────────────────────────────────────────────────────────────┐ │ Au 10Ω.1 1k 10 100 1M 10M ┌──────────────────────────────────┐ │ │I+ I- ΩG 4w|o||o||o||o||o||o||o||o| │ -│- | [] [] [] [] [] [] [] │ │ │(o)(o)(o)▄ [ ][ ][ ][ ][ ][ ][ ][ ] │ |°[] [] [] [] [] [] [] m A │ │ │ 2w 0 1 2 3 4 5 6 7 └──────────────────────────────────┘ │ │ │ │ Hi Lo Gu LG 8 9 . kbd ± Cl B C Lim Lim St │ │(o)(o)(o)▄ [ ][ ][ ] |o| [ ][ ][ ] [ ][ ][ ][ ][ ][ ] [ ][ ][ ][ ][ ] [] │ │ RG|o||o||o| [ ] |o||o||o| |o||o||o||o||o||o| |o||o||o||o||o| [] │ │ Z F I---fun--kΩ AC DC Mode Compute Pwr │ └─────────────────────────────────────────────────────────────────────────────┘

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 ±100nV or 126dB S/N.

DC VOLTS Input Z ---- Accuracy since last Cal------
Range: 24hr, 90 day, 1 year
100mV >10GΩ ±10ppm or 0.001%, 30ppm, 45ppm
1 & 10V >10GΩ ±5ppm or 0.0005%, 20ppm, 30ppm
100V & 1kV >100MΩ ±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
10Ω 10mA ±15ppm or 0.0015%, 40ppm, 60ppm
100Ω 10mA ±10ppm or 0.001%, 30ppm, 45ppm
1kΩ 1mA ±10pmm or 0,001% 30ppm. 45ppm
10kΩ 100uA ±10ppm or 0.001%, 30ppm, 45ppm
100kΩ 10uA ±15ppm or 0.0015% 40ppm. 60ppm
1MΩ 1uA ±30ppm or 0.003%, 100ppm, 200ppm
10MΩ 100nA ±150ppm or 0.015%, 300ppm, 500ppm

Measurement is 2 or true 4 wire system & with up to 10Ω 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 1MΩ//150pF ±0.04% ±0.08% ±0.12%
1-100V 1MΩ//150pF ±0.02% ±0.04% ±0.06%
100mV 1MΩ//150pF ±0.04% ±0.08% ±0.12%

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 ±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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