Hioki DT4254 - Page 11

11
A: 0.63 A/1000 V fuse
B: Circuit current-limiting resistor ( 5Ω )
COM
BA
+
Tester
circuitry
Protective
circuit
Fuse capacity:
AC: 50 kA
DC: 30 kA
0 V 0 V
Burner
Flame
sensor rod
Insulator
Control
board
Values are converted
to percentages and
displayed.
Output Display
4 mA 0%
20 mA 100%
AC contacts
DC contacts
Magnetic strap and auto-hold
function free up hands for easier
work
Automatic switching of
measurement in locations where
AC and DC voltages are mixed
Use a computer in the eld to save
and check measured values
By using the magnetic strap to secure the
instrument to the wall and the auto-hold
function to automatically stop display values,
you can free your hands, making it easier to
record measured values and signicantly
boosting work efciency.
When making measurements in locations
with both AC and DC voltages, automatic
switching eliminates the need to operate the
rotary switch and helps prevent
measurement mistakes.
Measured values can be displayed in real
time on a computer, and displayed values
can be saved to a le (text format) or graphed
at a user-specied interval.
*The computer and multimeter are electrically
isolated by means of optical communications so
that data can be sent with peace of mind.
Using the magnetic strap (option) AC/DC voltage automatic detection
(DT4253,DT4254, DT4255, DT4256 only)
With the Communication Package DT4900-01
(option)
Measure output voltage on the
secondary sides of inverters
Percentage display for
instrumentation signal measurement
Thorough prevention of short-
circuit accidents
Test no-load voltage at megasolar
installations
Polarity detection and notication
1700 V DC measurement (DT4254 only) 4 to 20 mA percentage-equivalent display (DT4253 only)
Voltage measurement terminal fuse (DT4255 only)
Accurately measure the fundamental wave by
eliminating harmonic components with the
DMM’s low-pass lter function.
The standard models’ dual display function
lets you to simultaneously check measured
values and percentage-equivalent values at
a glance.
When using the resistance measurement function, a protective circuit
functions to prevent a short-circuit accident in the event of erroneous
operation such improperly supplying voltage input. Even if a
short-circuit occurs inside the tester, a current-limiting resistor will limit
any short-circuit current while a fast-blow fuse quickly and reliably
disconnects the tester circuitry, preventing a short-circuit accident.
Model DT4254 can measure DC voltages up
to 1700 V, enabling you to make no-load
voltage inspections of megasolar
installations.*
Certain standard models can detect a load
voltage in excess of -10 V and notify the
operator with a red LED and beep.
(DT4254,DT4255, DT4256 only)
Temperature
Pressure
Flow rate
Transducer
With low-pass lter off With low-pass lter on
Fundamental component
Harmonic component
++
Fundamental component
Harmonic component
++
Measure very low currents used by
gas-burning devices
Intuitive notication of continuity
check results and excessively high
input with a red LED and beep
DC μA range (DT4253 only)
Model DT4253 provides a DC 60.00 μA
range for measuring burner ame currents.
Standard models notify the operator of continuity
check results and excessively high input with a
red LED and beep, making it possible to check
measurement results intuitively.
Continuous state Excessively high input
*Your instrument can be used to measure voltages in excess of 1000 V DC if and only if both of the following conditions are satised:
1. The circuit under measurement is isolated from the commercial power grid. 2. The circuit under measurement is isolated from ground.
Functions and Features