ENMET SMARTLOGGER - Manual (Page 7)

SMART LOGGER ENMET Corporation
1
1.0 Presentation 1.0 Presentation
The SMART LOGGER is a portable gas detector. It employs interchangeable SMART BLOCK sensor modules, which can
be chosen to detect oxygen (O
2
) or a toxic gas (O
3
, CO, H
2
S, CL
2
, SO
2
, NO, NO
2
, NH
3
, HCL, HCN, CLO
2
, H
2
, CH
2
OCH
2
, ...).
At any time, the SMART BLOCK can be changed and the instrument thus modified to correspond to the nature of the risk to
be detected. The instrument and an array of SMART BLOCKS are shown in Figure 1, and the nomenclature and features of
the instrument are given in Figure 2.
The instrument triggers a repetitive audible and visual alarm as soon as there is:
- An increase or decrease of oxygen, with the oxygen SMART BLOCK installed:
- Threshold overstepped, with a toxic SMART BLOCK installed:
+ Instantaneous: Authorized instantaneous maximizing value
+ STEL: Short term exposure limit (average on a period of 15 minutes)
+ TWA: Term weight average (average on a period of 8 hours)
TWA, STEL and instantaneous thresholds are preset in the factory. The table below gives the ranges, resolutions, and alarm
set points for the various sensors.
The instrument triggers a steady audible and visual alarm as soon as there is:
- An anomaly (electronic fault, SMART BLOCK fault)
- An insufficient power supply (discharged primary cell or rechargeable battery)
Sensor Units Range Resolution Inst TWA STEL
CO ppm 0-1000 1 35 35 400
H 2 S ppm 0-100 1 10 10 15
SO 2 ppm 0-30 1 2.0 2.0 5.0
H 2 ppm 0-2000 0.1 200 2000 2000
NO ppm 0-300 1 25 25 100
NO 2 ppm 0-30 1 1.0 1.0 1.0
Cl 2 ppm 0-10 0.1 0.5 0.5 1.0
HCl ppm 0-30 0.1 5.0 5.0 5.0
HCN ppm 0-10 0.1 4.7 4.7 4.7
NH 3 ppm 0-100 1 25 25 35
O 2 DEF % by vol 0-30 0.1 19.5 -- --
O 2 ABN % by vol 0-30 0.1 23.5 -- --
O 3 ppm 0-3 0.1 0.1 0.1 0.3
ClO 2 ppm 0-3 0.1 0.1 0.1 0.3
ETO ppm 0-30 1 1 1 5
An audible and visual "confidence beep" every 30 seconds indicates that the instrument is on and working.
In a very noisy place, an earphone can be connected to the instrument.
The SMART LOGGER is certified for use in a flammable atmosphere according to European rating, Ex EE ia IIC T4. This
is equivalent to Class I, Div. 1, Groups A, B, C, and D in the NEC.