6. USING THE CROWCON TETRA 3 GAS
DETECTOR
Switching on your unit
1)
Ensure the unit is in clean air.
2)
Switch on – Press and hold the operator button until the
red LED flashes. The operator display will light up and the
unit will begin a warm up sequence.
3)
The unit will test the alarm LEDs, sounder, vibration alerts,
and the operator display screen. The sounder may be
silenced by pressing the button.
4)
The unit will continue through a warm up sequence as
shown below, this will take approximately 45 seconds.
5)
If auto zero is enabled (default), the unit will display the
auto zero menu. Press the operator button with a single
click to confirm auto zero. If the operator button is not
pressed within the 10 second time out, Tetra 3 will proceed
directly to Run mode without performing zero.
1. IMPORTANT NOTES
•
For the use of MGF supplied equipment only.
•
Ensure users are fully trained in the operation of this
equipment and a site specific safe system of works is
in place and adhered to.
•
It is essential that site specific risk assessments are
undertaken.
•
Do not try to modify or change the equipment in any
way as this could void any warranty or cause damage
to equipment or persons using it.
•
If in doubt concerning the integrity of any part of the
equipment DO NOT USE IT
2. CROWCON TETRA 3 GAS DETECTOR
•
The Tetra:3 multi-gas monitor is a compact, robust and
easy-to-use diffusion based detector. Single button
operation, small size and clear top-mounted display make
it a favourite in the market amongst those working in
demanding industrial environments; such as those in the
water, telecoms, food, brewing or hydrocarbons sectors.
3. GASES AND RANGES
•
While these are the standard gases we use, we have the
ability to provide detection for other gases, please speak to
the MGF Safety Department for further details.
4. MGF EXAMINATION AND TESTING
•
Upon return to MGF the equipment will be cleaned,
inspected and function tested by a competent and trained
MGF safety technician.
5. VISUAL INSPECTION/FUNCTIONAL TEST -
PRIOR TO USE
•
Before the start of each use ensure that the equipment is
clean and free from debris and there are no obvious defects.
•
Ensure that the item has a green tag, stating when it was
last inspected.
•
Each item comes with a unique ID number, please ensure
this can be found.
Size
114 x 71 x 48mm (tapers to 20mm) (4.5 x 2.8
x 1.9ins)
Weight
295g (10.4oz)
Alarms
95dB multiple alarm sounds allow selection
of distinctive tones for different alarm
levels. Internal vibrating alarm
Display
Graphic LCD with backlight, giving simulta-
neous display for all gas channels. Graphic
symbols for battery (with proportional
indication of remaining operation time),
healthy operation or fault warning. Start-up
indication when calibration is due, over-
due, or service required. Normal display:
Real time gas concentration levels. Display
recall: Peak readings and TWA
Data Logging
Timed: 50 hours at 1-minute data rate
(>12,000 data logs of 4 channels) Threshold:
Starts after adjustable pre-set level
Event: >5,000 events
Event Logging
Alarm, over range, calibration, bump, on/off,
TWA, 1000 events
Battery
Rechargeable Li-ion battery
Operating
Time
Based on four-gas instrument fitted with
flammable sensor: A 5-hour charge from
flat provides at least 12 hours of continuous
use. A 12-hour charge provides at least 14
hours of continuous use
Sampling
Diffusion or hand aspirator
Operating
Temperature
-20°C to +55°C (-4°F to +131°F)
Storage
-25°C to +65°C (-13°F to +149°F)
Humidity
20 to 90% RH
@
40°C non-condensing
Ingress
Protection
IP65 and IP67
Approvals
ATEX II 2 G Ex ia d IIC T4 Gb (-20°C ≤ Ta ≤
+55°C) BASEEFA05ATEX0187
IECEx Ex ia d IIC T4 Gb (-20°C ≤ Ta ≤ +55°C)
BAS05.0059
CSA Class I Division 1 Groups A, B, C and D
Safety
Standards
EN60079-0, EN60079-11, EN60079-1,
CSA22.2, 152, EN50270, EN50271, EN50104,
EN45544, EN60079, IEC61508
Specifications
Gas
Range
Typical Alarms
Flammable
(Methane)
0-100% LEL
20%
Oxygen (O²)
0-25%
19/23.5%
Hydrogen Sulphide
(H²S)
0-100ppm
5ppm
Carbon Monoxide (CO)
1-500ppm
30ppm
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