This document describes the specifications of two digital multimeter models, the 98C+ and 98A+. Both models measure DC and AC voltage, current, resistance, capacitance, frequency, thermocouples, and temperature. They feature a 2.4G wireless communication module, 1000 data groups storage, LCD display, and function similarly with the 98C+ offering higher safety ratings. Key specifications are provided for each measurement function and general device features like power supply, safety ratings, size, and weight are also listed.

1. 98C+
(产品型号展示优化词：USB Digital Multimeter with 2.4G Wireless
98C+)
Features：
USB Digital Multimeter with 2.4G
Wireless 98C+
Specifications:
Model 98C+ 98A+
DC voltage Range 200mV/2V/20V/200V/1000V 200mV/2V/20V/200V/1000V
Basic accuracy ±（0.05%+4） ±（0.05%+4）
AC voltage Range 200mV/2V/20V/200V/1000V 200mV/2V/20V/200V/1000V
Basic accuracy ±（0.5%+40） ±（0.5%+40）
DC current Range 200uA/2000uA/20mA/200mA/2A/10A200uA/2000uA/20mA/200mA/2A/10A
Basic accuracy ±（0.2%+10） ±（0.2%+10）
AC current Range 200uA/2000uA/20mA/200mA/2A/10A200uA/2000uA/20mA/200mA/2A/10A
Basic accuracy ±（0.8%+30） ±（0.8%+30）
Resistance Range 200Ω/2kΩ/20kΩ/200kΩ/2MΩ/20MΩ/
60MΩ
200Ω/2kΩ/20kΩ/200kΩ/2MΩ/20MΩ/60
MΩ
Basic accuracy ±（0.2%+5） ±（0.2%+5）
Capacitance Range 10nF/100nF/1000nF/10uF/100uF
/1000uF/10mF/100mF
10nF/100nF/1000nF/10uF/100uF
/1000uF/10mF/100mF
Basic accuracy ±（5%+5） ±（5%+5）
Frequency Range 10Hz～10MHz 10Hz～10MHz
Basic accuracy ±（0.02%+4） ±（0.02%+4）
ThermocoupleRange K indexing：-200.0°C～1360.0°C K indexing：-200.0°C～1360.0°C
Basic accuracy ±（1%+1°C） ±（1%+1°C）
Thermal
resistance
Range Pt100：-200.0°C～850.0°C Pt100：-200.0°C～850.0°C
Basic accuracy ±（1%+0.5°C） ±（1%+0.5°C）
Display words 22000 22000
The measurement rate 3 times / sec 3 times / sec
Analog Bar graph 20 times / sec 20 times / sec
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2. Automatic / manual range Yes Yes
Measure the true effective value Yes Yes
Bandwidth 1kHz 1kHz
The duty ratio 0.1%～99% 0.1%～99%
Diode test Yes Yes
Switching test Yes Yes
Decibel measurement（dBm） Yes Yes
AC+DC Yes Yes
Maximum / minimum value
selection
(MAX/MIN/AVG)
Yes Yes
Relative value
measurement(REL)
Yes Yes
Data Hold Yes Yes
Auto Hold Yes Yes
Peak Hold Yes Yes
Cold end temperature
compensation
Yes Yes
Celsius / Fahrenheit temperature
switch
Yes Yes
The input impedance 10MΩ 10MΩ
Data recording 1000group 1000 group
Online communication 2.4G wireless communication module
and PC wireless communication
standard USB interface.
The isolation of the USB interface and
PC communication.
Support the SCPI command, can realize remote control instrument by the device
driver software. The powerful function, friendly man-machine interface, the user
can conveniently obtain multiple data parameters of instrument, and the data
storage, processing, management, access to data is displayed in the graphical or
tabular form.
Auto power-off Yes Yes
Display type LCD LCD
Backlight Yes Yes
Power Supply 4×AAA Alkaline batteries 4×AAA Alkaline batteries
Safety CAT IV 600V、CAT III 1000V CAT III 600V、CAT II 1000V
Electromagnetic compatibility IEC61326-1，Group1，Class B IEC61326-1，Group2，Class B
Size 205×95×42mm（Sheathing） 205×95×42mm（Sheathing）
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3. Weight About500g About500g
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