Hioki 3805 User manual

3805
DIGITAL HiTESTER
INSTRUCTION MANUAL

Contents
Introduction i
Inspection i
Safety Notes ii
Notes on Use viii
Chapter 1 Overview 1
1.1 Product Overview 1
1.2 Features 2
Chapter 2 Names and Functions of Parts 3
2.1 Push Buttons 4
2.2 Rotary Switch 7
2.3 Input Terminal 8
2.4 LCD Display Illustration 9
Chapter 3 Measurement Procedures 11
3.1 Voltage Measurement 13
3.1.1 AC Voltage Measurement 14
3.1.2 Frequency Measurement 15
3.1.3 DC Voltage Measurement 16
3.2 Diode Check 17
3.3 Resistance Measurement 19
3.4 Current Measurement 21
3.4.1 AC Current Measurement 22
3.4.2 Frequency Measurement 23
3.4.3 DC Current Measurement 24
3.5 Capacitance Measurement 25
3.6 Temperature Measurement 27

Chapter 4 Special Functions Instructions 31
4.1 Data Hold 32
4.2 Refresh Hold 33
4.3 Dynamic Recording 34
4.4 Harmonic Ratio Measurement 37
4.5 Relative (Zero) 38
4.6 % of mA Measurement (4-20mA) 39
4.7 Beeper On/Off 40
4.8 Set Up 41
4.8.1 Timer Setting for Auto-power Save 42
4.8.2 Selecting % Display for 4 to 20 mA 43
4.8.3 Selecting J/ k Types and / Display 44
4.9 Communication (RS-232C) 45
Chapter 5 Specifications 47
5.1 General Specifications 47
5.2 Accuracy Chart 51
Chapter 6 Maintenance and Service 57
6.1 Changing the Battery and Fuses 57
6.2 Cleaning 60
6.3 Service 60

i
_______________________________________________
Introduction
_______________________________________________
Introduction
Inspection
Thank you for purchasing the HIOKI "3805
DIGITAL HiTESTER". To obtain maximum
performance from the product, please read this
manual first, and keep it handy for future reference.
When you receive the product, inspect it carefully to
ensure that no damage occurred during shipping. If
damage is evident, or if it fails to operate according
to the specifications, contact your dealer or Hioki
representative.
Accessories
3851-10 TEST LEAD (a pair) 1
Protective holster 1
Instruction Manual 1
6F22 manganese battery 1
(built into this unit, for monitor)

ii
_______________________________________________
Safety Notes
_______________________________________________
WARNING
This product is designed to conform to IEC 61010
Safety Standards, and has been thoroughly tested
for safety prior to shipment. However,
mishandling during use could result in injury or
death, as well as damage to the product. Be
certain that you understand the instructions and
precautions in the manual before use. We
disclaim any responsibility for accidents or
injuries not resulting directly from product
defects.
Safety Notes

iii
_______________________________________________
Safety Notes
_______________________________________________
The symbol printed on the product
indicates that the user should refer to a
corresponding topic in the manual
(marked with the symbol) before
using the relevant function.
In the manual, the symbol indicates
particularly important information that
the user should read before using the
product.
Indicates a double-insulated device.
Indicates DC (Direct Current).
Indicates AC (Alternating Current).
Indicates both DC and AC.
Indicates grounding terminal.
Indicates that dangerous voltage may be
present at this terminal.
This manual contains information and warnings
essential for safe operation of the product and for
maintaining it in safe operating condition. Before
using the product, be sure to carefully read the
following safety notes.
Safety symbols

iv
_______________________________________________
Safety Notes
_______________________________________________
DANGER
Indicates that incorrect operation
presents an extreme hazard that could
result in serious injury or death to the
user.
WARNING
Indicates that incorrect operation
presents a significant hazard that could
result in serious injury or death to the
user.
CAUTION
Indicates that incorrect operation
presents a possibility of injury to the
user or damage to the product.
NOTE
Advisory items related to performance
or correct operation of the product.
The following symbols in this manual indicate the
relative importance of cautions and warnings.

v
_______________________________________________
Safety Notes
_______________________________________________
We define measurement tolerances in terms of f.s.
(full scale), rdg. (reading) and dgt. (digit) values,
with the following meanings:
f.s. (maximum display value or scale length)
The maximum displayable value or the full length of
the scale. This is usually the maximum value of the
currently selected range.
rdg. (reading or displayed value)
The value currently being measured and indicated
on the measuring product.
dgt. (resolution)
The smallest displayable unit on a digital measuring
product, i.e., the input value that causes the digital
display to show a "1".

vi
_______________________________________________
Safety Notes
_______________________________________________
Measurement categories (Overvoltage
categories)
This product conforms to the safety requirements for
CAT II (1000V), CATIII (600V) measurement
products.
To ensure safe operation of measurement product,
IEC 61010 establishes safety standards for various
electrical environments, categorized as CAT I to
CAT IV, and called measurement categories. These
are defined as follows.
CAT I : Secondary electrical circuits connected to
an AC electrical outlet through a
transformer or similar device.
CAT II : Primary electrical circuits in equipment
connected to an AC electrical outlet by a
power cord (portable tools, household
appliances, etc.)
CAT III : Primary electrical circuits of heavy
equipment (fixed installations) connected
directly to the distribution panel, and
feeders from the distribution panel to
outlets.
CAT IV : The circuit from the service drop to the
service entrance, and to the power meter
and primary overcurrent protection device
(distribution panel).