Hioki 2301-20 User manual

INSTRUCTION MANUAL
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2301-20
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HUMIDITY MODULE

i
Contents
Contents
Introduction ............................................................... 1
Inspection.................................................................. 1
Safety Notes ............................................................. 2
Notes on Use ............................................................ 5
Chapter 1 Overview 11
1.1 Product Overview ...................................... 11
1.2 Major Features .......................................... 12
1.3 Name and Function of the Parts................ 15
1.4 Dimension Diagrams ................................. 17
Chapter 2 Settings 19
2.1 Setting the Module ID................................ 19
Chapter 3 Preparations 21
3.1 Installing the Module ................................. 21
3.1.1 Installing the Module Base............. 21
3.1.2 Mounting a Module on the Module
Base.............................................. 21
3.2 Connecting Input/Output Cables ............... 22
3.2.1 Connecting Sensor Cables to the
Terminal block................................ 22
3.2.2 Connecting Cables to the ALARM
Terminal (Alarm output) ................. 24
3.2.3 The Location of the Input/Output
Cable.............................................. 25

Contents
ii
Chapter 4 Others 26
4.1 Alarm output.............................................. 26
4.1.1 Output Rating................................. 26
4.1.2 Internal Circuit................................ 27
4.2 Insulation of Internal Circuit....................... 29
Chapter 5 Specifications 31
5.1 Basic Specifications .................................. 31
5.2 Function Specifications ............................. 32
5.3 General Specifications .............................. 33
5.4 9764 HUMIDIDTY SENSOR
Specifications ............................................ 34
Chapter 6 Maintenance and Service 37
6.1 Cleaning .................................................... 37
6.2 Service ...................................................... 37

1
Introduction
Thank you for purchasing the HIOKI “Model 2301-
20 HUMIDITY MODULE”. To obtain maximum per-
formance from the instrument, please read this
manual first, and keep it handy for future refer-
ence.
When you receive the instrument, inspect it care-
fully to ensure that no damage occurred during
shipping. In particular, check the panel switches,
and connectors. If damage is evident, or if it fails to
operate according to the specifications, contact
your dealer or Hioki representative.
Accessories
Instruction manual ............................................1
Ferrite clamp.....................................................1
Terminal block...................................................3
Option
9764 HUMIDIDTY SENSOR
Introduction
Inspection

Safety Notes
2
This manual contains information and warnings
essential for safe operation of the instrument and
for maintaining it in safe operating condition.
Before using it, be sure to carefully read the follow-
ing safety precautions.
Safety Symbols
Safety Notes
This instrument is designed to comply with
IEC 61010 Safety Standards, and has been
thoroughly tested for safety prior to ship-
ment. However, mishandling during use
could result in injury or death, as well as
damage to the instrument. Be certain that
you understand the instructions and precau-
tions in the manual before use. We disclaim
any responsibility for accidents or injuries not
resulting directly from instrument defects.
In the manual, the symbol indicates particu-
larly important information that the user should
read before using the instrument.
The symbol printed on the instrument indi-
cates that the user should refer to a correspond-
ing topic in the manual (marked with the
symbol) before using the relevant function.
Indicates DC (Direct Current).

3
Safety Notes
The following symbols in this manual indicate the
relative importance of cautions and warnings.
Other Symbols
Indicates that incorrect operation presents an
extreme hazard that could result in serious injury
or death to the user.
Indicates that incorrect operation presents a sig-
nificant hazard that could result in serious injury
or death to the user.
Indicates that incorrect operation presents a pos-
sibility of injury to the user or damage to the
instrument.
Indicates advisory items related to performance
or correct operation of the instrument.
Indicates the prohibited action.
❖Indicates the reference.

Safety Notes
4
This instrument complies with CAT I safety requirements.
To ensure safe operation of measurement instruments, IEC
61010 establishes safety standards for various electrical en-
vironments, categorized as CAT I to CAT IV, and called mea-
surement categories. These are defined as follows.
CAT I Secondary electrical circuits connected to an AC
electrical outlet through a transformer or similar in-
strument.
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 out-
lets.
CAT IV The circuit from the service drop to the service en-
trance, and to the power meter and primary overcur-
rent protection instrument (distribution panel).
Higher-numbered categories correspond to electrical environ-
ments with greater momentary energy. So a measurement in-
strument designed for CAT III environments can endure
greater momentary energy than a instrument designed for
CAT II.
Using a measurement instrument in an environment designat-
ed with a higher-numbered category than that for which the in-
strument is rated could result in a severe accident, and must
be carefully avoided.
Never use a CAT I measuring instrument in CAT II, III, or IV
environments.
The measurement categories comply with the Overvoltage
Categories of the IEC60664 Standards.
Measurement categories (Overvoltage categories)

5
Notes on Use
Follow these precautions to ensure safe operation
and to obtain the full benefits of the various func-
tions.
Notes on Use
Operation and Installation environment.
This instrument should be installed and operated
indoors only, between 0 and 50°C (32 to 122°F)
and 80% RH or less.
Do not allow the instrument to get wet, and do
not take measurements with wet hands.
The instrument may be damaged.
Do not use the instrument where it may be
exposed to corrosive or combustible gases.
The instrument may be damaged.
Do not use the instrument near a source of
strong electromagnetic radiation, or near a
highly electrically charged object.
These may cause a malfunction.
This instrument is not designed to be entirely
water- or dust-proof.
Do not use it in an especially dusty environment,
nor where it might be splashed with liquid. This
may cause damage.
When the module is used in a dusty environment,
place it in a dustproof case and take measures to
ensure heat dissipation.
the instrument
to get wet.
Do not allow
Corrosive or
combustible
gases
Electromagnetic
radiation or
highly electricall
y
charged object

Notes on Use
6
Do not store or use the instrument where it
could be exposed to direct sunlight, high tem-
perature or humidity, or condensation.
Under such conditions, the instrument may be
damaged and insulation may deteriorate so that it
no longer meets specifications.
To avoid damage to the instrument, protect it
from physical shock when transporting and
handling.
Be especially careful to avoid physical shock from
dropping.
Do not obstruct the ventilation holes.
Ventilation holes for heat radiation are provided on
the top and rear panels of the instrument. Leave
sufficient space around the ventilation holes and
install the instrument with the holes unobstructed.
Installation of the instrument with the ventilation
holes obstructed may cause a malfunction or fire.
When using the instrument in the case, drill
ventilation holes.
Drill ventilation holes or install a ventilation fan to
prevent heat buildup.
Use the 9764 HUMIDIDTY SENSOR
To avoid damaging the 2301-20, only connect the
9764 HUMIDIDTY SENSOR to the TEMP and
HUM terminals. Moreover, do not input other sig-
nals to these terminals.
Direct sunlight
Dust
Temperature or
humidity

7
Notes on Use
Wiring
• A qualified electrician shall perform the wir-
ing to prevent electric shock.
• Avoid live-line electrical work to prevent
electric shock and accidents due to short-
circuiting.
• When tightening the screws, confirm that
all screws are securely tightened. A loose
screw may result in module errors, fire, or
electric shock.
• Tighten the screws within the specified
torque. Excessive torque may damage the
terminals. Inadequate torque may result in
module errors, fire, or electric shock.
• Ensure that the power supply module and
input are OFF until all wiring work is fin-
ished. This will prevent module trouble and
electric shock.
• Ensure that the power supply module and
input are OFF when connecting or discon-
necting the module to the system. This will
prevent electric shock, errors, and mal-
function.
• Avoid using an unused terminal for relay-
ing or any other purpose to prevent electric
shock, errors, and malfunction.

Notes on Use
8
• Connect the module to a power source that
matches the rating in order to prevent fire.
• Ensure that the power supply, input, and output
are correctly wired according to the wiring dia-
gram. (See the chapter on "Preparations" in the
instructions manual for each module.) This will
prevent fire, malfunction, and errors.
• Use cables of the proper sizes for the rated cur-
rent. This will prevent entire system errors and
fire resulting from broken wire.
• Use crimp connectors suitable for the cable
sizes. This will prevent module errors and fire
due to broken wires.
• If power supply noise poses a problem, use of a
noise filter is recommended.
• When the power and signal lines may be subject
to a lightning-induced surge, install a lightning
arrester between another instrument or module
connected to this module and line to protect the
system.
• Avoid stepping on or pinching cables, which
could damage the cable insulation.
• Keep the cables well away from heat sources,
as bare conductors could be exposed if the
insulation melts.

9
Notes on Use
9764 HUMIDIDTY SENSOR
Preliminary Checks
Before using the instrument the first time, verify
that it operates normally to ensure that the no
damage occurred during storage or shipping. If
you find any damage, contact your dealer or Hioki
representative.
• If the sensor is used or stored outside the oper-
ating or storage ranges, sensor accuracy may
be adversely affected and you may not get
accurate measurements even within the one-
year guaranteed period of accuracy.
• Hioki is not liable for any problems caused by
sensor use or storage outside the operating or
storage ranges.
• When not using the 9764 HUMIDIDTY SEN-
SOR, seal it in a plastic bag and store it in a
cool, dark place.
• Be careful to avoid condensation on the sensor.
If condensation occurs, you may not get accu-
rate measurements. Condensation is likely to
occur when the sensor is subject to rapid
changes in temperature.
Before using the instrument, make sure that
the insulation on the cables is undamaged
and that no bare conductors are improperly
exposed. Using the product in such condi-
tions could cause an electric shock, so con-
tact your dealer or Hioki representative for
repair.

Notes on Use
10

11
1.1 Product Overview
• The 2301-20 is a measurement module of Hioki
"Smart Site" (remote measurement system).
• This module measures and records temperature
and humidity at regular intervals.
• The 2301-20 is used with the power supply mod-
ule, communications module, and module base.
Overview Chapter 1
1.1 Product Overview
Number of
measurement
channels
Temperature 1 CH + Humidity 1 CH
Measurement
range
-40.0 to 85.0°C, 0.0 to100.0%RH
(Conceptual image)

1.2 Major Features
12
The recording interval is selectable from 1 second
to 60 minutes.
The maximum, minimum, and average measure-
ments during the recording interval can be
recorded (with sampling once a second).
The module has an alarm output terminal.
The capacitive humidity sensor for this module has
the following features relating to humidity mea-
surement:
• Stable characteristics
• Wide measurement range
• Long service life
• Quick response
• Resistance to condensation
1.2 Major Features

13
1.2 Major Features
Rough Estimate of Storable Data Quantity and Time
Action at memory full:
Continue recording (Endless)
Recording Mode
Instantaneous
Value MAX/MIN/AVE
Instantaneous
Value +
MAX/MIN/AVE
Quantity of
storable data 26000 13000 10000
Recording interval
1 sec. 7.5 hours 3.5 hours 2.5 hours
2 sec. 14.5 hours 7 hours 5.5 hours
5 sec. 1.5 days 18 hours 14.5 hours
10 sec. 3 days 1.5 days 1 day
15 sec. 4.5 days 2 days 1.5 days
20 sec. 6 days 3 days 2 days
30 sec. 9 days 4.5 days 3.5 days
1 min. 18 days 9 days 7 days
2 min. 36 days 18 days 14 days
5 min. 92 days 46 days 36 days
10 min. 184 days 92 days 73 days
15 min. 277 days 138 days 110 days
20 min. 369 days 184 days 147 days
30 min. 554 days 277 days 221 days
60 min. 1109 days 554 days 443 days
When the alarm log is ON, the higher the number
of alarms generated, the smaller the recording
period. (Approx. 1 of the data per alarm)

1.2 Major Features
14
Action at memory full:
Stop recording (Memory full stop)
Recording Mode
Instantaneous
Value MAX/MIN/AVE
Instantaneous
Value +
MAX/MIN/AVE
Quantity of
storable data 30000 15000 12000
Recording interval
1 sec. 8.5 hours 4 hours 3 hours
2 sec. 17 hours 8.5 hours 6.5 hours
5 sec. 1.5 days 21 hours 17 hours
10 sec. 3.5 days 1.5 days 1.5 days
15 sec. 5 days 2.5 days 2 days
20 sec. 7 days 3.5 days 2.5 days
30 sec. 10 days 5 days 4 days
1 min. 21 days 10 days 8 days
2 min. 42 days 21 days 17 days
5 min. 106 days 53 days 42 days
10 min. 213 days 106 days 85 days
15 min. 319 days 159 days 127 days
20 min. 426 days 213 days 170 days
30 min. 639 days 319 days 255 days
60 min. 1279 days 639 days 511 days
When the alarm log is ON, the higher the number
of alarms generated, the smaller the recording
period. (Approx. 1 of the data per alarm)

15
1.3 Name and Function of the Parts
1.3 Name and Function of the Parts
Front Back
POWER LED
Mark area
HUM terminal
A
LARM terminal
TEMP terminal
Module ID
setting dial

1.3 Name and Function of the Parts
16
POWER LED Goes on or flashes when power is supplied
to the module.
Remains on, flashes, or changes to another
color according to the state of the module.
POWER LED indication
Lit in green : Data being recorded.
Flashing in green : Standing by.
Lit in yellow : Alarm output.
Flashing in yellow : Overrange detected.
Lit in red : Non-recoverable error
occurred. *1
Flashing in red : Recoverable error
occurred. *2
Mark area Use this area to make a note of the object
to measure or the module ID.
Use an ink pen, since pencil lead may rub
off.
TEMP terminal Connect the temperature sensor to this ter-
minal.
HUM terminal Connect the humidity sensor to this termi-
nal.
ALARM terminal Connect the alarm output cable to this ter-
minal.
Module ID
setting dial
Use the dial to set the module's identifica-
tion No.
*1: The module needs repair. Contact your vendor (agent) or
nearest Hioki office.
*2: The same module ID may be used by another module.