Specifications
Recommended
for
Electrical, HVAC
and utilities
Installation and
maintenance
of machinery,
electrical systems
Electronics troubleshooting Industrial
Model no.
U1231A U1232A
U1233A
U1241B U1242B U1251B U1252B U1253B U1271A U1272A U1273A
Measurements
Continuity with
beeper
Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes
Diode test Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes
Data management
Min/max
recording
Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes
Display hold Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes
Peak hold Yes Yes Yes N/A N/A Yes Yes Yes Yes Yes Yes
Manual
datalogging
N/A N/A N/A N/A Yes Yes Yes Yes Yes Yes Yes
Null Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes
PC connectivity IR-USB IR-USB IR-USB IR-USB IR-USB IR-USB IR-USB IR-USB IR-USB IR-USB IR-USB
% scale of
4-20 mA
N/A N/A N/A Yes Yes Yes Yes Yes Yes Yes Yes
General
Operating
temperature
–10 to
55 °C, 0%
to 80% RH
–10 to
55 °C, 0%
to 80% RH
–10 to
55 °C, 0%
to 80% RH
–10 to
55 °C, 0 to
80% RH
–10 to
55 °C, 0 to
80% RH
–20 to
55 °C, 0 to
80% RH
–20 to
55 °C, 0 to
80% RH
–20 to
55 °C, 0 to
80% RH
–20 to
55 °C, 0 to
80% RH
–20 to
55 °C, 0 to
80% RH
–20 to
55 °C, 0 to
80% RH
Measurement
category
CAT III
600 V
CAT III
600 V
CAT III
600 V
CAT III
1000 V/
CAT IV
600 V
CAT III 1000
V/CAT IV
600 V
CAT III 1000
V/ CAT IV
600 V
CAT III 1000
V/ CAT IV
600 V
CAT III 1000
V/CAT IV
600 V
CAT III 1000
V/CAT IV
600 V
CAT III
1000 V/
CAT IV
600 V
CAT III
1000 V/
CAT IV
600 V
Battery type
(included)
4 x 1.5 V 4 x 1.5 V 4 x 1.5 V 4 x AAA 4 x AAA 9 V
7.2 V
(recharge-
able)
7.2 V
(recharge-
able)
4 x AAA 4 x AAA 4 x AAA
Battery life 500 hours 500 hours 500 hours 300 hours 300 hours 72 hours 36 hours 8 hours 300 hours 300 hours 30-60 hours
Dimensions
(H x W x D)
169.0 x
86.0 x
52.0 mm
169.0 x
86.0 x
52.0 mm
169.0 x
86.0 x
52.0 mm
193.8 x
92.2 x
58.0 mm
193.8 x
92.2 x
58.0 mm
203.5 x
94.4 x
59.0 mm
203.5 x
94.4 x
59.0 mm
203.5 x
94.4 x
59.0 mm
207.0 x
92.0 x
59.0 mm
207.0 x
92.0 x
59.0 mm
207.0 x
92.0 x
59.0 mm
Advanced
functions
Built-in
flashlight,
continuity
alert with
flashing
backlight,
Z
Low
Built-in
flashlight,
continuity
alert with
flashing
backlight,
Z
Low
Built-in
flashlight,
non-contact
voltage
detector
with Vsense,
continuity
alert with
flashing
backlight,
Z
Low
Switch
counter
Switch
counter,
harmonic
ratio, dual
and
differential
temperature
mesure-
ments
N/A
20 MHz
frequency
counter,
program-
mable
square wave
generator
Organic
LED display,
20 MHz
frequency
counter,
program-
mable
square wave
generator
Low pass
filter, AC
and/or DC
voltage
check
Low pass
filter, low
impedance
mode, offset
compensa-
tion
Low pass
filter, low
impedance
mode, offset
compensa-
tion
Digital Multimeters Continued
4