Getting Started  1
U1241A/U1242A User’s and Service Guide  5
The Annunciator at a Glance
To view the full display, press and hold   while turning the rotary 
switch from OFF to any non- OFF position. Press any key to resume 
normal functionality mode. 
Figure 1-3 Annunciator display of a U1242A handheld digital multimeter
Table 1 - 2 Descriptions of each annunciator
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
21
20
22
23
No. Descriptions No. Descriptions
1 21-segment analog bar graph display 12 MINMAX Recording mode 
2 Capacitor discharge indicator 13 Harmonic Ratio mode (for U1242A)
3 Cold junction of ambient temperature disabled 14 Data logging mode (for U1242A)
4 Audible continuity for resistance and diode function 15 Data logging View mode (for U1242A)
5 Primary display  16 Auto or manual for data logging mode and datalog 
viewing mode
6 AC or DC measurement mode 17 Secondary display (temperature display)
7 Auto range 18 Null math function
8 Diode / Audible continuity 19 Thermocouple type for temperature measurement
9 T1, T2 and T1 – T2 temperature measurements scan 
(for U1242A)
20 Primary measurement units
21 Measurement range
10 Data hold 22 Low battery indicator
11 T1, T2* or T1 – T2* temperature measurements 23 Auto power off indicator
*T2 temperature measurement and delta (T1 – T2) are only available for U1242A.