Hioki DSM-8542, Instruction Manual, Page: 3 / 140

i
Preface
Thank you for purchasing the DSM-8542 and welcome to the growing family of HIOKI’s
Digital Super Megohm Meters/Current Meters.
The DSM-8542 is an insulation resistance meter up to 1000V in measuring voltage.
Incorrect operation of the meter potentially causes an electric shock or damage to a
sample. Please read this manual thoroughly before using the meter and exercise
reasonable caution regarding safety. Keep this manual handy for future reference.
The product has been shipped after minute preshipment inspection by HIOKI.
Nevertheless, please contact our distributor or sales office near your location in case of
a trouble.
I. Product Overview
The Digital Super Megohm Meter DSM-8542 is an insulation resistance meter
embedded with a high-sensitivity ammeter.
The meter has been developed to measure insulating materials of a high resistance
value, capable of measuring resistance within the range of 1 x 10
3
to 3 x 10
16
Ω
and a
current within the range of 30fA to 10mA.
A liquid crystal display module (240 x 64 dots) of the meter allows easy viewing of
needed information and ease of use.
The meter is an insulation resistance meter and requires installation of an external
power supply unit as a power source for measurement. An external power supply unit
for measurement of insulation resistance is a customer supply scope. HIOKI E. E.
Corporation supplies a dedicated power supply unit PSU-8541 as an option. PSU-8541
incorporates a low-noise voltage source and is suitable for measuring insulation
resistance of insulating materials of large capacities.
Principal Features (When dedicated power supply unit PSU-8541 is used)
Measurable voltage range : 0.1 to 1000V
Measurable current range : 30fA to 10mA
Measurable resistance range : 1 x 10
3
to 3 x 10
16
Ω
Current limiter setting : 5mA, 10mA, 50mA (0.1 to 250V)
: 5mA, 10mA (251 to 1000V)
Integral time setting function : 2ms to 300ms
Trigger delay setting function : 0 to 9999ms
Automatic averaging measurement function
Voltage check function
Contact check function
Self-calibration function
Comparison decision, volume resistivity, surface resistivity computing
functions