PZ158D DC digital voltmeterDetailed product description：

Overview
The PZ158D DC digital voltmeter is a high-precision electronic measuring instrument with a single-chip microcomputer technology, which can measure at 4 and a half or 5 and can be freely selected, with a resolution of up to 1 µ V and a measurement speed of up to 50 times per second. Due to the advanced single-chip microcomputer and precise analog-to-digital conversion technology used in the instrument, it can automatically calibrate the zero position and provide effective digital filtering, thereby endowing the instrument with extremely stable zero position, excellent reading linearity, and strong anti-interference ability. This series of instruments adopts a seven digit red LED display. The excellent performance of this instrument can play a significant role in fields such as scientific research, industry, agriculture, and national defense, making it an ideal product to replace the original company PZ8.
This instrument has an RS232C interface output and can be directly connected to a computer with a serial port to form a testing system.  

Main technical indicators
Conversion rate: 2 times/second (5 half bits) or 50 times/second (4 half bits);  
Measurement with maximum and minimum values;  
Measurement range, resolution, and basic error of the product under reference conditions:

model	range	measurement range	resolution	basic error
PZ158D (5 and a half digits)	0.2V	0-0.220000V	1μV	±(0.005%RD+0.0015%FS)
	2V	0-2.20000V	10μV
	20V	0-22.0000V	100μV	±(0.006%RD+0.002%FS)
	200V	0-220.000V	1mV
	1000V	0-1000.00V	10mV
PZ158D (4 and a half digits)	0.2V	0-0.22000V	10μV	±(0.02%RD+0.015%FS)
	2V	0-2.2000V	100μV
	20V	0-22.000V	1mV
	200V	0-220.00V	10mV
	1000V	0-1000.0V	100mV

Dimensions: 88 × 215 × 285mm.