Zeta Alarm Systems ZS-H2S/500 User manual

Gas Sense
Gas Detection System

Contents
Introduction 3
Introduction to Gas Detection Systems 3
Introduction to the Gas Sense System 3
Where to Install a Gas Detector 4
When to Test the Detector 5
Detector Construction 6
Gas Sense Detectors 7
Toxic Detector Specications 8
Combustible Detector Specication 9-10
Zeta Sense Gas Control Panel 11
Zeta Addressable Input-Ouput Units 12
Maxitone Addressable Sounder 13
Typical Connection Diagram 14
Calibration and Bump Testing 15
2

Introduction
Zeta Alarm Systems, a trading name of GLT Exports
Ltd, was founded in 1985 and is a privately held UK
manufacturer of Fire Alarm, Gas Detection and
Emergency Systems.
Our brand name is well known throughout the industry and is
acclaimed in over forty countries worldwide. We are currently
represented in the UK, Europe, Africa, the Middle East, Southern Asia
& South America and this list continues to grow
Introduction to Gas Detection Systems
Gas exposure can be fatal. During everyday life, we will be exposed
to a wide range of gasses, which when at low concentration levels, or
when carefully controlled & monitored do not pose any danger. But a
build up of combustible gas caused by a leak can cause an explosion.
Or a build up of toxic gas, such as carbon monoxide can be fatal.
Introduction to the Gas Sense System
With this in mind Zeta Alarm Systems have developed the Gas Sense
range of gas detectors.This innovative detector can run as a self
contained stand alone detector, or it can be linked to a central
monitoring panel where up to 48 detectors can be connected. The
detectors can be for the same gas, or for mixed gasses.
In its initial release, detectors will be available for the following gasses:-
ACETONE
BENZINE
CO
ETHANOL
ETHYL ACETATE
ETHYLENE
H2S
ISO PROPYL ALCOHOL
MEK
METHANE
METHANOL
N-BUTANE
N-HEPTANE
N-HEXANE
N-OCTANE
N-PENTANE
NH3
NO2
CHLORINE
PROPANE
TOLUENE
UNLEADDED PETROL
But the modular nature of the design will allow for further gasses to be added in the future.
3

Where to Install a Gas Detector
Gas Type Molecular Weight
NH3 17
CO 28
Air 29
NO2 30
H2S 34
Propane 44
Ethanol 46
N-Butane 58
Acetone 58
Isopropyl Alcohol 60
N-Pentane 72
Benzene 78
N-Hexane 86
Ethyl Acetate 88
Toluene 92
N-Heptane 100
N-Octane 114
Unleaded Petrol 114
Like all gas detectors, the best place to
install a Gas Sense detector will depend on
the target gas. In general, for gasses lighter
than air it will be installed 30-50cm from the
ceiling. For gasses lighter than air it will be
installed 30-50cm from the oor. For gasses of
a similar weight to air, the gas sense detector
should be installed close to head height
(approx. 1.2 to 2.0m)
The coverage of these detectors will depend on the
target gas, and the airow conditions in the area to be
protected. The Typical coverage is 50m².
If the gas detector is being installed to monitor a
specic risk, then the detector should be located
approximately 1.5m away from that point (This is
because if the gas escapes under pressure, it may
be forced past the sensor, rather than into it, if the
detector is too close).
Lighter Gases
30cm to 50cm
Heavier Gases
30cm to 50cm
Gases of Similar
Weight to Air
1.2 to 2.0m
Environmental Factors
When choosing the best place to install the detector,
consider all other environmental factors in that area,
such as:-
Ventilation or Air Conditioning Vents – Do not place a
detector where forced air ow will prevent gas entering
the detector.
Open Windows – Airow through an open window can
similarly prevent gas entering the detector.
Dust & Debris – Avoid placing the detector where a
constant generation of debris could block the lter,
preventing gas from entering the sensor chamber.
Maintenance access – critical detectors should be
checked regularly, and the sensor will need to be
replaced every 3-5 years. Do not t to an inaccessible
location.
Ceiling beams – if a lighter than air gas is to be
detected, large ceiling beams can effect coverage,
requiring a detector between each beam.
The Gas sense range of detectors are not suitable for
use in hazardous areas. They are intended for use in
light industrial, academic, commercial or domestic
installations.
4

When to Test the Detector
Determining the frequency of gas detector testing will depend on a suitable risk analysis of
the protected area. For example if the consequences of a leak are small, then checks every 6
months or a year may be acceptable. If the consequences of a leak are severe, then it is good
practice to check the detector calibration regularly.
While the gas sense detectors are not currently intended for hazardous area use, the extract below gives an idea of
the sort of practice required when the consequences of a leak are severe.
The International Safety Equipment Association
recommends, at a minimum, verication of sensor
accuracy before each day’s use. Additional testing of
instrumentation should be carried out before each
new conned space entry – after the crew’s lunch
hour, for example.
The only way to guarantee an instrument will detect
gas accurately and reliably is to test it with a known
concentration of gas. Exposing the instrument to a
known concentration of test gas will show whether
the sensors respond accurately and the instrument
alarms properly.
There are two methods of verifying instrument
accuracy: a functional or bump test and a full
calibration. Each is appropriate under certain
conditions. A bump test veries calibration by
exposing the instrument to a known concentration
of test gas. The instrument reading is compared
to the actual quantity of gas present, as indicated
on the cylinder. If the instrument’s response is
within an acceptable tolerance range of the actual
concentration, then its calibration is veried.
It is recommended that users check with the
gas detection equipment manufacturer for the
acceptable tolerance ranges.
Instruments should be “zeroed” before the bump
test to give a more accurate picture of the bump test
results.
Also, the test should be conducted in a clean, fresh
air environment. When performing a bump test,
the test gas concentration should be high enough
to trigger the instrument alarm. If the instrument
fails a bump test, it must be adjusted through a full
calibration before it is used.
During a period of initial use of at least 10 days in
the intended atmosphere, calibration should be
veried daily to ensure nothing is in the atmosphere
to poison the sensors. The period of initial use
must be of sufcient duration to ensure the sensors
are exposed to all conditions that might adversely
affect the sensors. If the tests demonstrate that no
adjustments are necessary, the interval between
checks may be lengthened, but it should not exceed
30 days.
If the instrument fails a bump test, it must be
adjusted through a full calibration before it is used.
When calibrating an instrument, always follow the
manufacturer’s recommended calibration frequency
and procedure.
5

Detector Construction
The Detector design consists of 2 chambers. The main chamber houses all the electronics, and is
where all electrical connections are made.The second chamber is where the sensor element is
located.
This design allows the sensor element to be easily replaced by removing 2 external screws, and 2 internal screws.
This avoids all contact with the main electronics.The housing is made from ame retardant ABS. The lter housing
is made from stainless steel.
The detector itself has 4 control buttons to allow conguration of the unit. It has a 2 x 16 character LCD display,
plus 4 indication LEDS to show its current status. The LEDs are Normal/Fault (2 colour LED), pre-alarm, Alarm 1 and
Alarm 2.
M3 x 25
Captive Screw
Calibration Cap
Filter Housing
Filter Disc
O-Ring
Cyberboard Fixing Ring
Cyberboard
Gasket
Hinge Pin
Hinge Pin Earthing Bar
Fixed with 2 x M4 Screws
Wall Fixings
M4 Headed Inserts
Main Board Assy
Display Board Assy
Joint Seal
Front Cover
M4 x 30 Cap Screws
Spring
Spring
M3 Inserts
Overlay
FFC Seal
6

Gas Sense Detectors
The Zeta Gas Sense detector is a 24V gas
detector that can run either in stand alone
mode, or can be connected to a control panel
for the centralized monitoring of several
detectors.
Stand Alone Mode
In stand alone mode, the detector has 3 relay outputs,
and a monitored 24V output (Intended for alarm sirens).
The 3 relay outputs correspond to the 3 alarm levels
of PREALARM, ALARM 1 and ALARM 2. Each of these
threshold levels has a default setting, and can be
altered by +/- 5% or +/- 10%.
The detector will display the gas type, the current
status (normal, fault or alarm), along with the current
sensor reading on its 2 x 16 character LCD display. As
the gas concentration level rises, the detector will light
its relevant alarm LEDs and operate its relays. They
operate concurrently, so that in the highest alarm level,
all lower alarm LEDs & relays will remain ON.
System Mode
In System mode, the detector will display SYS to
indicate that it is now part of a system. It will function
similar to when it is in Stand alone mode, except the
alarm relays will be under the control of the re panel.
This feature allows the control panel to monitor the
system as a whole before deciding whether or not to
operate an output.
The detectors can also be locally recalibrated, with
menu options to set the zero level, and options to set
the calibration span, with the use of a calibration gas
cylinder lled with the full scale gas concentration
level.
At the end of the recommended working life of the
sensor, a replacement sensor should be tted. The part
numbers for each sensor are shown on the specication
table.
7

Toxic Detector Specications
In order to easily identify
each toxic gas detectors,
each gas has it’s own
colour coded label.
Gas Type H2S NH3 NO2 CO CL2
Model Number ZS-H2S/500 ZS-H2S/200 ZS-H2S/100 ZS-NH3/1000 ZS-NH3/100 ZS-NO2/20 ZS-CO/300 ZS-CL2/20
Part Number 47-522 47-521 47-520 47-531 47-530 47-540 47-510 47-550
Replacement
Sensor Part Number DXCY-DT-NT-H2S-3 DXCY-DT-NT-H2S-2 DXCY-DT-NT-H2S-1 DXCY-DT-NT-NH3-2 DXCY-DT-NT-NH3-3 DXCY-DT-NT-NO2 DXCY-DT-NT-CO-2 DXCY-DT-NT-CL2
Supply Voltage 24V DC 24V DC 24V DC 24V DC 24V DC 24V DC 24V DC 24VDC
Sensor Type Electro Chemical Electro Chemical Electro Chemical Electro Chemical Electro Chemical Electro Chemical Electro Chemical Electro Chemical
Sensor Life 2 years 2 years 2 years 2 years 2 years 4 years >2 Years >2 Years
Specic Gravity
(Air=1) 1.19 1.19 1.19 0.59 0.59 1.1 0.97 2.45
Pre Alarm (PPM)
Bold = Default
050ppm, 075ppm,
100ppm,
125ppm, 150ppm
020ppm, 030ppm,
040ppm,
050ppm, 060ppm
010ppm, 015ppm,
020ppm,
025ppm, 030ppm
0.10kppm,
0.15kppm,
0.20kppm,
0.25kppm,
0.30kppm
010ppm, 015ppm,
020ppm,
025ppm, 030ppm
2.0ppm, 3.0ppm,
4.0ppm, 5.0ppm,
6.0ppm
030ppm, 045ppm,
060ppm,
075ppm, 090ppm
2.0ppm, 3.0ppm,
4.0ppm, 5.0ppm,
6.0ppm
1st Alarm (PPM)
Bold = Default
100ppm, 125ppm,
150ppm,
175ppm, 200ppm,
040ppm, 050ppm,
060ppm,
070ppm, 080ppm
020ppm, 025ppm,
030ppm,
035ppm, 040ppm
0.20kppm,
0.25kppm,
0.30kppm,
0.35kppm,
0.40kppm
020ppm, 025ppm,
030ppm,
035ppm, 040ppm
4.0ppm, 5.0ppm,
6.0ppm, 7.0ppm,
8.0ppm
060ppm, 075ppm,
090ppm,
105ppm, 120ppm
4.0ppm, 5.0ppm,
6.0ppm, 7.0ppm,
8.0ppm
2nd Alarm (PPM)
Bold = Default
150ppm, 175ppm,
200ppm,
225ppm, 250ppm
060ppm, 070ppm,
080ppm,
090ppm, 100ppm
030ppm, 035ppm,
040ppm,
045ppm, 050ppm
0.30kppm,
0.35kppm,
0.40kppm,
0.45kppm,
0.50kppm
030ppm, 035ppm,
040ppm,
045ppm, 050ppm
6.0ppm, 7.0ppm,
8.0ppm, 9.0ppm,
10.0ppm
090ppm, 105ppm,
120ppm,
135ppm, 150ppm
6.0ppm, 7.0ppm,
8.0ppm, 9.0ppm,
10.0ppm
Target Gas Range 0-500 ppm 0-200 ppm 0-100 ppm 0-1000 ppm 0-100 ppm 0-20 ppm 0-300 ppm 0-20 ppm
Operating
Temperature -20°C to 50°C -20°C to 50°C -20°C to 50°C -30°C to 50°C -30°C to 50°C -20°C to 50°C -20°C to 50°C -20°C to 50°C
Maximum Humidity
(Constant) 15-90% RH 15-90% RH 15-90% RH 15-90% RH 15-90% RH 15-90% RH 15-90% RH 15-90% RH
Maximum Humidity
(Intermittent) 0-99% RH 0-99% RH 0-99% RH 0-99% RH 0-99% RH 0-99% RH 0-99% RH 0-99% RH
IP Rating IP65 IP65 IP65 IP65 IP65 IP65 IP65 IP65
Quiescent Current 48mA 48mA 48mA 48mA 48mA 48mA 48mA 48mA
Response Time 20 seconds 20 seconds 20 seconds <90 seconds <90 seconds <25 seconds < 45 seconds <25 seconds
Storage Time
Without Comprising
Lifetime
6 months 6 months 6 months 6 months 6 months 6 months < 6 months 6 months
Recommended
Storage
Temperature
0°C- 20°C 0°C- 20°C 0°C- 20°C 0°C- 20°C 0°C- 20°C 0°C- 20°C 0°C- 20°C 0°C- 20°C
8

Combustible Detector Specication
Alkanes & Aromitics
For combustible gases, the Zeta Gas Sense detector uses the same sensor element for all gas types.
The detector is then calibrated specically for that gas.
Gas Type Benzine Propane Methane Ethyl
Acetate N-Octane N-Butane Isopropyl Alcohol N-Heptane N-Pentane
Model Number ZS-BEN/1.3% ZS-PRO/2.1% ZS-MTE/5.0% ZS-ELA/2.2% ZS-OCT/.95% ZS-BUT/1.8% ZS-IPA/2.2% ZS-HEP/1.05% ZS-PEN/1.4%
Part Number 47-570 47-700 47-620 47-590 47-680 47-650 47-610 47-660 47-690
Replacement
Sensor Part Number
DXCY-DF
NP17SH-BZ
DXCY-DF
NP17SH-PR
DXCY-DF
NP17SH
DXCY-DF
NP17SH-AE
DXCY-DF
NP17SH-OT
DXCY-DF
NP17SH-BU
DXCY-DF
NP17SH-IP
DXCY-DF
NP17SH-EP
DXCY-DF
NP17SH-PE
Supply Voltage 24V DC 24V DC 24V DC 24V DC 24V DC 24V DC 24V DC 24V DC 24V DC
Sensor Type Catalytic Catalytic Catalytic Catalytic Catalytic Catalytic Catalytic Catalytic Catalytic
Sensor Life < 5 years < 5 years < 5 years < 5 years < 5 years < 5 years < 5 years < 5 years < 5 years
Specic Gravity
(Air=1) 2.67 1.57 0.55 3.03 3.93 2.06 2.07 3.45 2.49
Pre Alarm (%LEL)
Bold = Default
10%, 15% , 20%,
25%, 30%
10%, 15% , 20%,
25%, 30%
10%, 15% , 20%,
25%, 30%
10%, 15% , 20%,
25%, 30%
10%, 15% , 20%,
25%, 30%
10%, 15% , 20%,
25%, 30%
10%, 15% , 20%,
25%, 30%
10%, 15% , 20%,
25%, 30%
10%, 15% , 20%,
25%, 30%
1st Alarm (%LEL)
Bold = Default
20%, 25%, 30%,
35%, 40%
20%, 25%, 30%,
35%, 40%
20%, 25%, 30%,
35%, 40%
20%, 25%, 30%,
35%, 40%
20%, 25%, 30%,
35%, 40%
20%, 25%, 30%,
35%, 40%
20%, 25%, 30%,
35%, 40%
20%, 25%, 30%,
35%, 40%
20%, 25%, 30%,
35%, 40%
2nd Alarm (%LEL)
Bold = Default
30%, 35%, 40%,
45%, 50%
30%, 35%, 40%,
45%, 50%
30%, 35%, 40%,
45%, 50%
30%, 35%, 40%,
45%, 50%
30%, 35%, 40%,
45%, 50%
30%, 35%, 40%,
45%, 50%
30%, 35%, 40%,
45%, 50%
30%, 35%, 40%,
45%, 50%
30%, 35%, 40%,
45%, 50%
Target Gas Range 1.3% Vol 2.1% Vol 5% Vol 2.2% Vol .95% Vol 1.8% Vol 2.2% Vol 1.05% Vol 1.4% Vol
Operating
Temperature -20 to 150°C -20 to 150°C -20 to 150°C -20 to 150°C -20 to 150°C -20 to 150°C -20 to 150°C -20 to 150°C -20 to 150°C
Maximum Humidity
(Constant) 0-100%RH 0-100%RH 0-100%RH 0-100%RH 0-100%RH 0-100%RH 0-100%RH 0-100%RH 0-100%RH
IP Rating IP65 IP65 IP 65 IP65 IP65 IP65 IP65 IP65 IP65
Quiescent Current 67mA 67mA 67mA 67mA 67mA 67mA 67mA 67mA 67mA
Response Time 8 seconds 8 seconds 8 seconds 8 seconds 8 seconds 8 seconds 8 seconds 8 seconds 8 seconds
Storage Time
Without Comprising
Lifetime
< 6 months 6 months 6 months 6 months 6 months 6 months 6 months 6 months 6 months
Recommended
Storage
Temperature
0-20°C 0-20°C 0-20°C 0-20°C 0-20°C 0-20°C 0-20°C 0-20°C 0-20°C
9

Combustible Detector Specication (Continued)
Other Gases
Gas Type N-Hexane Toluene Ethanol Unleaded
Petrol Methanol Ethylene Acetone Methyl Ethyl Ketone (Mek)
Model Number ZS-HEX/1.02% ZS-TOL/1.2% ZS-ENL/3.3% ZS-PET/1.3% ZS-MTL/6.7% ZS-ELE/2.7% ZS-ACE/2.6% ZS-MEK/1.9%
Part Number 47-670 47-710 47-580 47-720 47-630 47-600 47-560 47-640
Replacement Sensor
Part Number
DXCY-DF NP17SH-
ES
DXCY-DF NP17SH-
TO
DXCY-DF NP17SH-
ET
DXCY-DF NP17SH-
VB
DXCY-DF NP17SH-
MT
DXCY-DF NP17SH-
EL
DXCY-DF NP17SH-
AT
DXCY-DF NP17SH-
MK
Supply Voltage 24V DC 24V DC 24V DC 24V DC 24V DC 24V DC 24V DC 24V DC
Sensor Type Catalytic Catalytic Catalytic Catalytic Catalytic Catalytic Catalytic Catalytic
Sensor Life < 5 years < 5 years < 5 years < 5 years < 5 years < 5 years < 5 years < 5 years
Specic Gravity
(Air=1) 2.97 3.18 1.59 0.7 1.1 0.97 2 2.48
Pre Alarm (%LEL)
Bold = Default
10%, 15%, 20%,
25%, 30%
10%, 15%, 20%,
25%, 30%
10%, 15%, 20%,
25%, 30%
10%, 15%, 20%,
25%, 30%
10%, 15%, 20%,
25%, 30%
10%, 15%, 20%,
25%, 30%
10%, 15%, 20%,
25%, 30%
10%, 15%, 20%,
25%, 30%
1st Alarm (%LEL)
Bold = Default
20%, 25%, 30%,
35%, 40%
20%, 25%, 30%,
35%, 40%
20%, 25%, 30%,
35%, 40%
20%, 25%, 30%,
35%, 40%
20%, 25%, 30%,
35%, 40%
20%, 25%, 30%,
35%, 40%
20%, 25%, 30%,
35%, 40%
20%, 25%, 30%,
35%, 40%
2nd Alarm (%LEL)
Bold = Default
30%, 35%, 40%,
45%, 50%
30%, 35%, 40%,
45%, 50%
30%, 35%, 40%,
45%, 50%
30%, 35%, 40%,
45%, 50%
30%, 35%, 40%,
45%, 50%
30%, 35%, 40%,
45%, 50%
30%, 35%, 40%,
45%, 50%
30%, 35%, 40%,
45%, 50%
Target Gas Range 1.02% Vol 1.2% Vol 3.3% Vol 1.3% Vol 6.7% Vol 2.7% Vol 2.6% Vol 1.9% Vol
Operating
Temperature -20 to 150°C -20 to 150°C -20 to 150°C -20 to 150°C -20 to 150°C -20 to 150°C -20 to 150°C -20 to 150°C
Maximum Humidity
(Constant) 0-100%RH 0-100%RH 0-100%RH 0-100%RH 0-100%RH 0-100%RH 0-100%RH 0-100%RH
IP Rating IP65 IP65 IP65 IP65 IP65 IP65 IP65 IP65
Quiescent Current 67mA 67mA 67mA 67mA 67mA 67mA 67mA 67mA
Response Time 8 seconds 8 seconds 8 seconds 8 seconds 8 seconds 8 seconds 8 seconds 8 seconds
Storage Time Without
Comprising Lifetime 6 months 6 months 6 months 6 months 6 months 6 months 6 months 6 months
Recommended
Storage Temperature 0-20°C 0-20°C 0-20°C 0-20°C 0-20°C 0-20°C 0-20°C 0-20°C
10

Zeta Sense Gas Control Panel
The Zeta Gas Sense Controller (ZSC100) has
been designed to monitor and control 48 gas
sense detectors.
In addition to this, it can run Zeta addressable I/O
units, and the range of Zeta addressable sounders. It
has a 4 x 40 character LCD display which helps display
all the required device information on the screen.
From the user menu, the status of each detector can
be viewed, and its gas concentration level observed.
This remote monitoring and checking facility is useful if
there are many detectors spread across a wide area on
the system.
The system can be divided into 20 zones, allowing
detectors to be grouped either by gas type, or by
building area.
The Panel has a powerful, but intuitive interface for
programming system cause and effect, allowing the
various detectors on the system to operate whichever
outputs are required.
Model ZSC100
Supply Voltage + 24V
Back-up Battery 2 x 12 Ah MAX
Quiescent Current 175mA
Alarm Current (excl. devices) 241 mA
Operating Temperature -5 °C to + 40°C
Humidity 95% RH Non-Condensing
IP Rating 30
Size (Height x Width x Depth) 335 x 375 x 125mm
Weight (Without Batteries) 6 kg
Loop Capacity Up to 125 Devices
11

Zeta Addressable Input-Ouput Units
The Zeta addressable input output units (ZIOU
and ZIOU/230) are used to interface external
equipment to any Zeta addressable re alarm
system.
It has a switch monitoring input with a 47K End-of-Line
resistor and volt free SELV relay output.
There are two versions available, one for switching
low voltage (ZIOU) and the other for switching mains
(ZIOU/230).
As with all addressable interfaces, the outputs are
controlled by the panel to which they are connected.
Consequently the interfaces will behave differently on
different panels, i.e some may allow the outputs to be
programmed whilst others will have a default “pre-
programmed” operation.
Model ZIOU ZIOU/230
Part No 48-105 48-106
Operating Voltage 17-33V DC 17-33V DC
Quiescent Current 900uA 900uA
Alarm Current 10.6mA 10.6mA
Fault Current 2.8mA 2.8mA
Isolating Current 7.3mA 7.3mA
Input End-of-Line 47K 47K
Device Normal Resistance (Return Value
16) 10K to 75K 10K to 75K
Device Open CCT Fault Resistance
(return Value 4) 85K to open circuit 85K to open circuit
Device Alarm Resistance (Return Value
64) 0K to 5K 0K to 5K
Relay Rating 1 Amp SELV Only 5 Amp 230V AC Resistive
Operating Temperature O°C to 50° C O°C to 50° C
Maximum Humidity 95% RH Non-Condensing 95% RH Non-Condensing
IP Rating 43 43
Size (Width x Height x Depth) 127 x 88 x 59mm 127 x 88 x 59mm
Weight 220g 220g
12

Maxitone Addressable Sounder
The Maxitone addressable Sounder is a large
horn sounder suitable for many applications.
It can be used on any panel using Zeta Addressable
Protocol. It is available as a sounder only in red or
white, or as a combined sounder asher in transparent
red. It is suitable for indoor and outdoor use.
It has a large back-box with knockout cable entries,
which has plenty of room for tting the cables. It has an
internal 8 way dip switch for setting the device address,
and sound output of 94 dBA at 1m.
Both units have a built-in short circuit isolator to
provide system integrity in the event of cable damage.
Model ZAMT/R ZAMT/W ZAMTF/R
Part No. 42-007 42-007A 42-070
Colour Red White Red
Supply Voltage 17.33V 17.33V 17.33V
Standby Current 0.6mA 0.6mA 0.6mA
Active Current 12mA 12mA 15mA
Sound Output 94dB 94dB 94dB
Number of Tones 2 (Controlled by FACP) 2 (Controlled by FACP) 2 (Controlled by FACP)
Flasher N/A N/A Red LED-2Hz
Operating Temp. 0°C to 50°C 0°C to 50°C 0°C to 50°C
Max. Humidity 95% RH N/C 95% RH N/C 95% RH N/C
IP Rating IP65 IP65 IP65
Size 124 X 129 x 100 mm 124 X 129 x 100 mm 124 X 129 x 100 mm
Weight 200g 200g 200g
13

Typical Connection Diagram
Zeta Maxitone
Sounder
ZIOU
Zeta Addressable Gas Sense
ZSC100
Single Loop Gas
Control Panel
+24V PSU
Mains In
14

Calibration and Bump Testing
Gas detectors should be functionally tested regularly to ensure their
correct operation. This is referred to as bump testing.
To bump test a Zeta Gas Sense detector, t the Calibration cap to the stainless
steel lter housing. Then take a test Cylinder with the appropriate gas type &
concentration. Fit the tube from the cylinder to the Calibration cap . Open the
regulator on the cylinder. Check that the reading on the detector rises and reaches
the level indicated on the cylinder (Within the specied tolerance range)
If a detector fails this bump test then it should be zero’s in clean air then
recalibrated using the calibration cap and the gas cylinder.
Test Gas Cylinders
A range of cylinders are available for testing the Gas Sense detectors.
Gas Type H2S H2S H2S NH3 CO NO2 O2
Volume Of Test Cylinder 34 Litres 34 Litres 34 Litres 34Litres 34 Litres 34 Litres 34 Litres
Test Gas Concentration 250 ppm 100 ppm 50 ppm 500 ppm 50 ppm 10 ppm 150 ppm
Part Number 31650-3-1 31650-4-1 31650-5-1 31650-7-1 31650-6-1 31650-2-1 31650-1-1
Pressure 500PSI 500PSI 500PSI 500PSI 500PSI 500PSI 500PSI
Other gasses & concentrations are available on request.
15

Tel: [phone]
Fax: [phone]
E-mail: [email protected]
Web: www.zetaalarmsystems.com
Detection House
72-78 Morfa Road
Swansea
SA1 2EN
United Kingdom
Available now from: