Micronta 22-191 (USA)

Availability	Marketed by RadioShack/Tandy 1983-87 Made in Korea
RadioShack	Collection of RadioShack / Tandy catalogues from 1939 to 2011 (view online!)
Useful link	Detailed teardown at KuzyaTech</td>
Operation	Manual range selection
Display	3 1/2 digit LCD / Max 1999
Safety	Over-range indication on eachrange. Full auto-polarity operation. Fuse 0.315A 250V
DC voltage Max. 1000 V	200mV-2V-20V-200V-2000V accuracy ±0.8% of reading / ±0.2% full scale / ±1 in last digit
AC voltage Max. 500V RMS	2V-20V-200V-2000V accuracy ±1% of reading / ±0.5% full scale / ±1 in last digit
DC current	2mA-20mA-200mA accuracy ±1.5% of reading / ±0.2% full scale / ±1 in last digit
AC current	2mA-20mA-200mA accuracy ±1.5% of reading / ±0.5% full scale / ±1 in last digit
Resistance	200Ω-2kΩ-20kΩ-200kΩ-2000kΩ ±1.5% of reading / ±0.2% full scale ±1 in last digit / +18 digit max at 200Ω 20MΩ - ±3.0% of reading / ±0.3% full scale / ±1 in last digit
Continuity	Buzzer sounds at less than 300Ω input
Diode Test	check if open or short
Input impedance	10 MΩ (DCV/ACV) more than 100MΩ on 200mV DC
Dimensions	196 x 90 x 36 mm / 7.7 x 3.5 x 1.4 inches
Weight	300g approx./ 10.6 oz
Battery	2 x 1.5V AAA "BATT" on left of display if below 1.2-1.3V
This example	40 yrs, display and selectors working

Micronta 22-191 (USA 1983-87)