Consilium Salwico ST400 H2S Use and care manual

Salwico ST400 H2S
CGD50/500
Calibration Instruction

Consilium Building Safety AB
Phone: [phone]
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E-mail: [email protected]
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The contents of this document are subject to revision without notice
due to continued progress in methodology, design and
manufacturing. Consilium Building Safety AB assumes no legal
responsibility for any error or damage resulting from the usage of
this document.
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April 2019
Document no. 5103028_Salwico ST400 H2S_Calibration Instruction_I0_EN_2019_C
Part no. 5103028
© Copyright 2019, Consilium Building Safety AB

Calibration Instruction 1Calibration Instruction for Salwico ST400 H2S
5103028_Salwico ST400 H2S_Calibration Instruction_I0_EN_2019_C 1
1 Calibration Instruction for Salwico ST400
H2S
1.1 Preliminaries
This instructions applies to the following products:
Figure 1. Salwico ST400 H2S, 0-30 ppm 4-20 mA. Part no. 4462
The H2S sensor is Electrochemical and measures H2S content by means of
chemical reaction.
DANGER!
H2S – Hydrogen Sulphide – is toxic and dangerous also in rather low concentrations.
H2S is a sticky gas and smells very distinctly from rotten eggs.
Consilium Replacement article number for ST400 H2S detectors is no. 004462-S.
A new sensor is supplied without the metal housing and must be fitted in the
housing. This applies to both H2S and O2sensors of ST400 type.
Calibration equipment
Normal measuring range is 0-30 ppm, our standard calibration bottle no.
5201005-00A contains 20 ppm of gas in air.
For SW2020 a mix-bottle is often used, with H2S 20 ppm as well as N299% and
C3H850% LEL, article no. 5201010-01A.
Test points (A) for the multi-meter as well as “SPAN” (B) and “ZERO” (C)
potentiometers are indicated below.
CAUTION!
Do not adjust the other potentiometers.

1Calibration Instruction for Salwico ST400 H2S Calibration Instruction
25103028_Salwico ST400 H2S_Calibration Instruction_I0_EN_2019_C
A Test points
B SPAN potentiometer
C ZERO potentiometer
1.2 Prerequisites
1 Use the arrow keys on the control panel to
manoeuvre through the different menus.
Press the right arrow key to access the
menu tree.
2 Scroll to 4 Gas Detectors and press
Continue.
3 Scroll to the detector that should be
calibrated and press Options.
4 Scroll to 3 Disable and choose Continue.
5 You have to confirm the disablement before
you can proceed.
Press Disable to continue.

Calibration Instruction 1Calibration Instruction for Salwico ST400 H2S
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6 You will get a confirmation message that
the detector has been disabled.
Press Close to continue.
7NOTE!
For the following steps in the
zero calibration instruction
proceed to the Salwico ST400
detector.
1.3 Calibrating the sensor (Zero calibration)
1 Connect the Multi-meter (set to mA) as
shown in the picture.
2 Adjust with the “ZERO” potentiometer to
4,0 mA signal output.
1.4 Calibrating the sensor (Span calibration)
Verification of detector type 0-25 ppm or 0-30 ppm
NOTE!
The ST400 for H2S is available in two types.
Type 1: 0-25 PPM. mA-signal at 20 ppm = 16.8 mA.
Type 2: 0-30 PPM. mA-signal at 20 ppm = 14.6 mA.
To verify which type is in use, make a span calibration as below and verify the
display reading in the central cabinet.
•If the readout at 14.6 mA is less than 20 PPM a calibration with 16.8 mA
set-point must be done.

1Calibration Instruction for Salwico ST400 H2S Calibration Instruction
45103028_Salwico ST400 H2S_Calibration Instruction_I0_EN_2019_C
Span calibration
1 Connect the gas bottle with flowcap to the
sensor head.
CAUTION!
Due to the sticky
nature of the H2S as
short hoses as possible
are to be used.
2 Open the regulator valve.
3 When the reading is stabilized, adjust the
readout to 14.6 mA (or 16.8 mA) with the
“SPAN” potentiometer.
NOTE!
Response can be estimated to
several minutes in some cases.
If this reading cannot be
reached, the sensor head
should be replaced.
1.5 Reconnecting disabled detectors
All disablements in the CGD50/500 gas detection system are presented in the
disablements list. Any enablement is made from this list.
1 Scroll to Menu » Disablements.
2 Choose the detector you just disabled and press Options.
3 Select Reconnect and press Continue.

Calibration Instruction 1Calibration Instruction for Salwico ST400 H2S
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FOR ALL THOSE MOMENTS
WHEN SAFETY MATTERS
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