1 Getting Started
36 Keysight U1251B and U1252B User’s and Service Guide
The secondary display signs are explained below.
The analog bar emulates the needle on an analog multimeter, without displaying
the overshoot. When measuring peak or null adjustments and viewing
fast-changing inputs, the bar graph provides a useful indication because it has
quicker update rate for fast response applications.
The bar graph is not used for square wave output, frequency, duty cycle, pulse
width, 4–20 mA% scale, 0–20 mA% scale and temperature measurements. When
frequency, duty cycle and pulse width are indicated on the primary display during
voltage or current measurement, the bar graph represents the voltage or current
LCD symbol Description
ºF Fahrenheit temperature unit
%
Percentage scale readout proportional to DC 0–20 mA
%
Percentage scale readout proportional to DC 4–20 mA
Table 1-4 Primary display symbols (continued)
Table 1-5 Secondary display symbols
LCD symbol Description
AC + DC
DC
AC
Polarity, digits and decimal points for secondary display
kHz
Frequency units: Hz, kHz
No ambient temperature compensation, just thermocouple measurement
ºC
Celsius ambient temperature unit
ºF
Fahrenheit ambient temperature unit
mV
Voltage units: mV, V
μmA
Current units:
μA, mA, A
s
Elapsed time unit: s (second) for Dynamic Recording and 1 ms Peak Hold modes