Crowcon Tetra User Manual

X. Specification
Dimensions 122 x 128 x 57 mm (4
3
/4 x 5 x 2
1
/2 inches)
Weight 498 g rechargeable unit, including belt clip and
4 sensors.
Housing, degree of protection Ingress protection IP65 (NEMA 4)
Operating temperature -20 to +55°C (-4 to +131 F)
Humidity 0-99% RH, non-condensing for continuous
operation
Display 128 x 64 pixel
Warm up time 45 seconds approximately
Response time (typical) (T90) : appx 20 seconds for most toxic sensors,
10 seconds for oxygen.
Repeatability ±2% FSD, 6 months
Explosion protection Intrinsically Safe
ATEX Essential Health and Safety Requirement, clause
15.9
Safety certificate no. BASEEFA03ATEX0193
Approval codes
Europe: ATEX II 2G EEx ia d IIC T4, (Tamb –20 to +55°C)
USA: Class 1 Division 1, Groups A, B, C and D.
Canada: Approvals pending.
Standards
Safety: EN50014, EN50020, EN50018, 94/9/EC
USA: UL913
Canada: CSA22.2, 152
Operation EN50270, EN50271, IEC61508
Marine Equipment Directive Tetra can be supplied Wheelmarked compliant
96/98/EC with the Marine Equipment Directive. Contact
Crowcon to obtain a copy of the MED certificate
26
Specification Tetra

Crowcon Tetra Specifications

General

Operating Temperature	-20°C to +50°C
Type	Portable Gas Detector
Gases Detected	Oxygen, Carbon Monoxide, Hydrogen Sulfide
Display	LCD
Ingress Protection	IP65
Sensor Types	Electrochemical