SENKO SI-100C User manual

SENKO CO., LTD.
SI-100C
Operating Manual

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This manual contains operating instructions for stationary gas monitoring instruments
designed for area air quality and safety applications, and should be STUDIED CAREFULLY
by all persons responsible for the operation and maintenance of the instruments. All
SENKO equipment described herein is designed or manufactured for use only as set forth
herein and by the labels affixed, or other literature accompanying the product.
Where WARNINGS or CAUTIONS are herein set forth, they must be followed. If SENKO
equipment is used in a manner or under conditions not specifically authorized or
prescribed by this manual, or by other materials or written instructions either
accompanying the product or authorized by SENKO in writing, or if it is used or
maintained by unqualified or improperly trained personnel, SENKO Co., Ltd. disclaims all
responsibility of every kind for said equipment. While basic connection installation
instructions are included, all equipment must be installed by qualified personnel.
FOLLOWING ALL ASPECTS OF THE LOCAL CODE REQUIREMENTS. Also, the instruments
must be calibrated and alarms tested periodically by trained personnel for proper
functioning of the instruments.
CAUTION: The overall system, especially where gas monitoring sensors are used, must
be CALIBRATED BY QUALIFIED PERSONNEL. Thereafter, a monthly calibration check is
recommended to assure reliability and accuracy.
Please call the factory if any problems are encountered.
WARRANTY
SENKO sensors and instruments are designed for area air quality and safety applications.
SENKO gas monitoring instruments are provided with a one year warranty. This warranty
covers only defective parts or workmanship in normal use and service. Instruments
which fail to function due to factory defect
Within one year of date of shipment are to be returned to SENKO for warranty repair.
SENKO will determine the nature and responsibility for the defect. In all cases the
warranty is limited to the original cost of the equipment. Any misuse of equipment is the
customer’s responsibility. SENKO will either repair or replace (at SENKO’s option)
returned instruments subject to the warranty, at no charge. No field service is included
in this warranty. For field service requirements please contact SENKO.
This warranty is voided by:
1. Improper application of instrument.
2. Misuse of instrument.
3. Intentional or accidental damaging of instrument.
4. Not returning the sensor to factory for warranty validation.
For any queries regarding warranty repair or replacements, please include the
instrument model and serial number in any transmittals to SENKO. SENKO instruments
are supplied with operating and installation manuals and other literature. These are the
only source of specific details regarding proper operation and maintenance of the
equipment. These instructions must be carefully read and the precautions followed in
detail. Instruments must be calibrated and alarms checked periodically to
assure proper equipment operation. Please refer to the manual for details.
WARNING
Read this manual carefully before using the instrument. The instrument
will perform as designed only if it is used and maintained in accordance
with the manufacturer's instruction. Otherwise, it could fail to perform as
designed and persons who rely on this instrument for their safety could
sustain serious personal injury or death.

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Table of contents
Warning………………………………………………………………………………………………….2
1. Introduction…………………………………………………………………………4
2. Specification…………………………………………………………………………4
3. Sensor specification…………………………………………………………………5
4. Electrical wiring………………………………………………………………………5
5. Calibration………………………………………………………………………………..6
6. Notice for user………………………………………………………………………..8
7. Certification………………………………………………………………………….9

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Introduction
Features
1. Inlet for cable (NPT3/4")
2. Top case
3. Hole for grounding (M4)
4. Part for installation of the detector (M5)
5. Sensor
Specification
Model
SI-100C
Detecting
Diffusion Type
Measuring Gas
Combustible Gas
Toxic Gas
Oxygen
Measuring Method
Catalytic
IR
Electrochemical
cell
Galvanic
Accuracy
± 3% / Full Scale
Alarm
1st alarm, 2nd alarm
Output Signal
Analog Output:4-20mA
Cable/ Distance
Analog : 4-20mA/Maximum 2,500m
Operating Humdity
-20°C ~ 50°C, 5~95% RH (Non-condensing)
Operating Power
10~30V DC
Dimensions
150(W) X 165(H) X 110(D)mm, 1.0kg
Approval
Ex d ⅡC T5, IP65

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1
Sensor Specification
Gas
Range
Low
High
O2
0~30%VOL
19%VOL
23%VOL
CO
0~500PPM
30PPM
60PPM
SO2
0~20PPM
2PPM
5PPM
H2
0~1000PPM
100PPM
500PPM
H2S
0~200PPM
10PPM
15PPM
NH3
0~100PPM
25PPM
35PPM
LEL(CH4)
0~100%LEL
20%LEL
40%LEL
Electrical Wiring
PIN
3-Wire
Color
1
Power (+), 24V DC
RED
2
4~20mA Signal Output
WHITE
3
Ground (-)
BLACK
PIN
2-Wire
Color
1
Power (+), 24V DC
RED
2
4~20mA Signal Output
WHITE
3 WIRE SAMPLE
2 WIRE SAMPLE
2
1
2
3

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Calibration
Z: Zero Calibration
-Entry to Zero Calibration-
It shows RED light on the LED marked Z when you supplied power to the
instrument.
-Execution of Zero Calibration-
Press the button for more than 3 seconds to execute zero Calibration at the state
of lighting on the LED marked Z.
-Completion of Zero Calibration-
Zero Calibration proceeds for 3 seconds and will be completed. Processing time of
Zero calibration may vary depending on each gas sensor applied. LED marked Z
blinks during the process and will be lighted from Z to S repeatedly when it finished.
S: Span Calibration
-Entry to Span Calibration-
It shows RED light on the LED marked Z when you supplied power to the
instrument. At this time, press button once to move to Span Calibration mode.
You will be seen the AMBER light on the LED marked S.
It’s shifted from Zero(RED) to Span(AMBER) repeatedly by pressing the button.
-Execution of Span Calibration-
Prepare and supply the Standard gas into the gas sensor part of the instrument
and then press the button for more than 3 seconds to execute Span Calibration at
the state of lighting on the LED marked S.
-Completion of Span Calibration-
Processing time of Span Calibration vary depending on each sensor applied. LED
marked S blinks during the process and will be lighted from S to Z repeatedly
when it finished.

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LED
Zero: RED / Span: Orange
LEL
CO
H2S
O2
Max
Range
100% LEL
500 PPM
200 PPM
30% vol.
Gas for
Calibration
ZERO
SPAN
0% LEL
25% LEL
0 PPM
100 PPM
0 PPM
50 PPM
0 % vol.
20.9 % vol.
Flow rate
300 cc/min
300 cc
300 cc
300 cc
Time needed
for
calibration
ZERO: at once
SPAN: 120s
ZERO: at once
SPAN: 120s
ZERO: at once
SPAN: 120s
ZERO: 120s
SPAN: 120s
NOTICE
We recommend calibration once every six months, at least once a year. Sensor’s output going down
as time goes by; measurement error will increase.
Calibration is crucial for the sensor performance and persons relying on this product for their safety.
WARNING
Do not Fresh Air Calibration unless you are certain you are in fresh,
uncontaminated air; otherwise, inaccurate readings can occur which can
false indicate that a hazardous atmosphere is safe. If you have any doubts as to the quality of the
surrounding air, do not use the Fresh Air Calibration feature. The calibration check is required to verify
span accuracy. Failure to follow this warning can result in serious personal injury or death.
button

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Notice for User
Please use the instrument in the range of the applicable temperature,
humidity and pressure that are appropriate for the specification of the
product. Using the instrument beyond this range may cause malfunction
or glitch of the instrument.
Gas concentration measurement value by the sensor or the instrument
can vary according to the environment at site (temperature, pressure and
humidity). Therefore the calibration of the instrument should be performed
at the same or similar environment as that of the instrument use
(temperature, pressure and humidity).
If temperature changes sharply during use of the instrument (for instance,
using the instrument at places of far different temperatures between
indoor and outdoor), the value of the measured gas concentration can be
changed suddenly. Please use it after the gas concentration value is
stabilized.
Severe vibration or shock to the instrument may cause the sudden change
of value of the measured gas concentration. Please use it after the value
of gas concentration is stabilized. Excessive shock to the unit can lead to
trouble of the sensor or the instrument.

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Certification

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