Digital Multimeters 
  Detailed Specifications 
 49 
Temperature (28 II Only) 
Range Resolution 
Accuracy 
[1,2]
 
-200 °C to +1090 °C 
-328 °F to +1994 °F 
0.1 °C 
0.1 °F  
±(1.0 % + 10) 
±(1.0 % + 18) 
[1]  Does not include error of the thermocouple probe. 
[2]  Accuracy specification assumes ambient temperature stable to ± 1 °C. For ambient temperature changes of ± 5 °C, rated accuracy 
applies after 2 hour. 
AC Current 
Accuracy 
Function Range  Resolution Burden Voltage 
27 II
 [1,2] 
(40 Hz – 1 kHz) 
28 II
 [3] 
(45 Hz – 2 kHz) 
600.0 μA 0.1 μA 100 μV/μA 
μA ac 
6000 μA 1 μA 100 μV/μA 
60.00 mA  0.01 mA  1.8 mV/mA 
mA ac 
400.0 mA
 [4]
 
0.1 mA  1.8 mV/mA 
6.000 A  0.001 A  0.03 V/A 
A ac 
10.00 A
 [5,6]
 
0.01 A  0.03 V/A 
±(1.5 % + 2)  ±(1.0 % + 2) 
[1]  AC conversion for the 27 II is ac coupled and calibrated to the rms value of a sine wave input. 
[2]  Below 300 counts, add 1 count and the temperature coefficient is 0.15 x (specified accuracy) / °C (>40 °C). 
[3]  AC conversions for the 28 II are ac coupled, true rms responding, and valid from 3 % to 100 % of range, except 400 mA range. 
(5 % to 100 % of range) and 10 A range (15 % to 100 % or range). 
[4]  400 mA continuous. 600 mA for 18 hr maximum. 
[5]  W 10 A continuous up to 35 °C. <20 minutes on, 5 minutes off at 35 °C to 55 °C. >10 A to 20 A for 30 seconds maximum, 
5 minutes off. 
[6]  >10 A accuracy unspecified.