U1271A U1272A U1273A U1273AX U1281A U1282A
Basic features              
Display resolution   30,000 counts (LCD) 30,000 counts (LCD) 30,000 counts (OLED) 30,000 counts (OLED) 60,000 counts (LCD) 60,000 counts (LCD)
AC bandwidth   20 kHz 100 kHz 100 kHz 100 kHz 30 kHz 100 kHz
True RMS   AC AC + DC AC + DC AC + DC AC + DC AC + DC
               
Measurements              
Voltage DC Range 300 mV to 1000 V 30 mV to 1000 V 30 mV to 1000 V 30 mV to 1000 V 60 mV to 1000 V 60 mV to 1000 V
  Basic accuracy [± (% of readings + LSD)] 0.05% + 2
 		 0.05% + 2
 		 0.05% + 2
 		 0.05% + 2
 		 0.025% + 5
 		 0.025% + 5
 
Voltage AC Range 300 mV to 1000 V 30 mV to 1000 V  30 mV to 1000 V 30 mV to 1000 V  60 mV to 1000 V 60 mV to 1000 V
  Basic accuracy [± (% of readings + LSD)] 0.7% + 20
 		 0.6% + 20
 		 0.6% + 20
 		 0.6% + 20
 		 0.3% + 25
 		 0.3% + 25
 
Current DC Range 300 µA to 10 A 300 µA to 10 A 300 µA to 10 A 300 µA to 10 A 600 µA to 10 A 600 µA to 10 A
  Basic accuracy [± (% of readings + LSD)]  0.2% + 5 0.2% + 5 0.2% + 5 0.2% + 5 0.05% + 5 0.05% + 5
Current AC Range 300 µA to 10 A 300 µA to 10 A 300 µA to 10 A 300 µA to 10 A 600 µA to 10 A 600 µA to 10 A
  Basic accuracy [± (% of readings + LSD)]  0.9% + 25
 		  0.6% + 25
 		  0.6% + 25
 		  0.6% + 25
 		  0.6% + 25
 		  0.6% + 25
 
Resistance Range 300 Ω to 100 MΩ 30 Ω to 300 MΩ 30 Ω to 300 MΩ 30 Ω to 300 MΩ
 		 600 Ω to 60 MΩ
 		 600 Ω to 600 MΩ
  Basic accuracy [± (% of readings + LSD)] 0.2% + 5
 		 0.2% + 5
 		 0.2% + 5
 		 0.2% + 5
 		 0.05% + 2
 		 0.05% + 2
 
Frequency Range 99.999 Hz to 999.99 kHz 99.999 Hz to 999.99 kHz 99.999 Hz to 999.99 kHz 99.999 Hz to 999.99 kHz 99.999 Hz to 9.9999 MHz 99.999 Hz to 9.9999 MHz
  Basic accuracy [± (% of readings + LSD)]  0.005% + 5
 		  0.005% + 5
 		  0.005% + 5
 		  0.005% + 5
 		  0.005% + 3
 		  0.005% + 3
 
Capacitance

Range

 10 nF to 10 mF 10 nF to 10 mF 10 nF to 10 mF 10 nF to 10 mF 10 nF to 100 mF 10 nF to 100 mF
  Basic accuracy [± (% of readings + LSD)] 1% + 2
 		 1% + 2
 		 1% + 2
 		 1% + 2
 		 1% + 5
 		 1% + 5
 
Temperature   K-type  J, K-type J, K-type J, K-type K-type J, K-type
Diode Test   Yes          
               
Special features              
Squarewave output   -  - - - - Yes
Vsense: non-contact voltage detection   -  - - - - Yes
Frequency counter   -  - - - - Yes
Low pass filter   Yes Yes Yes Yes - Yes
Low impedance mode   - Yes Yes Yes - -
Hold & Export   - - - - Yes Yes
               
General              
Logging Memory   200 points (Unlimited with Keysight Meter Logger software) 10,000 points (Unlimited with Keysight Meter Logger software) 10,000 points (Unlimited with Keysight Meter Logger software) 10,000 points (Unlimited with Keysight Meter Logger software) 10,000 points (Unlimited with Keysight Meter Logger software) 10,000 points (Unlimited with Keysight Meter Logger software)
PC Connectivity   Optional - USB, Bluetooth Optional - USB, Bluetooth Optional - USB, Bluetooth Optional - USB, Bluetooth Standard- USB, Optional - Bluetooth Standard- USB, Optional - Bluetooth
Operating temperature   -20 to 55 0C
 		 -20 to 55 0C
 		 -20 to 55 0C
 		 -40 to 55 0C
 		 -20 to 55 0C
 		 -20 to 55 0C
 
Operating hours   300 hours (4X AAA Alkaline batteries) 300 hours (4 X AAA Alkaline batteries) 60 hours (4X AAA Alkaline batteries) 100 hours (4X AAA Lithium batteries) 800 hours (4X AA Alkaline batteries) 800 hours (4X AA Alkaline batteries)
Water and dust ingress protection   IP 54
 		 IP 54
 		 IP 54
 		 IP 54
 		 IP 67
 		 IP 67
 
Over-voltage safety protection   CAT III 1000V / CAT IV 600V CAT III 1000V / CAT IV 600V  CAT III 1000V / CAT IV 600V CAT III 1000V / CAT IV 600V CAT III 1000V / CAT IV 600V CAT III 1000V / CAT IV 600V
Warranty   3-year 3-year 3-year 3-year 3-year 3-year

Note: Refer to datasheet for detailed specifications.