IM 12A01A02-01E 5/11
8th Edition
NEPSI Intrinsic safety approval
Applicable Standard
GB 3836.1-2010 Explosive atmospheres- Part 1: Equipment - General requirements
GB 3836.4-2010 Explosive atmospheres- Part 4: Equipment protection by intrinsic safety “i”
GB 3836.20-2010 Explosive atmospheres- Part 20: Equipment with equipment protection level
(EPL) Ga
Type of protection
Ex ia IIC T4 Ga
T4: for ambient temperature: -20°C to 55°C
Atmosphere pressure: 80kPa (0.8bar) to 110kPa (1.1bar)
(page 1-11) addition
CSA
Control Drawing (for 4-20mA type)
Class I, Division 1, Groups A, B, C, D, or
Class I, Zone 0, Group IIC
or
Class I, Division 2, Groups A, B, C, D, or
Class I, Zone 2, Group IIC,
Temperature Class: T4
Measuring Module 1
Measuring Module 2
Sensor 1
Sensor 2
Voc (or Uo) ≤ Ui
Isc (or Io) ≤ Ii (only for IS)
Po ≤ Pi (only for IS)
Ca (or Co) ≥ Ci + Ccable
La (or Lo) ≥ Li + Lcable
Associated Apparatus with
Entity Parameters or
NIFW parameters
Housing Assembly
FLEXA Series Analyzer
Supply
Supply
Non Hazardous Area
Hazardous Area
, Supply –
Ui: 30 V
Ii: 100 mA (only for IS)
Pi: 0.75 W (only for IS)
Ci: 13 nF
Li: 0 mH
-
+
-
+
Measuring Module 1, 2
Type of Measuring Module
pH, SC, DO
ISC
SENCOM
Uo
11.76 V
11.76 V
5.36 V
Io
116.5 mA
60.6 mA
106.16 mA
Po
0.3424 W
0.178 W
0.1423 W
Co
100 nF
100 nF
31 μF
Lo
1.7 mH
8 mH
0.45 mH
Specific Conditions of Use
- Precautions shall be taken to minimize the risk from electrostatic discharge of non-metallic parts and
painted parts of the enclosure. When the equipment used in hazardous locations, avoid any action
which generate electrostatic discharge such as rubbing with a dry cloth.
- In the case where the enclosure of the analyzer is made of Aluminum, if it is mounted in ZONE 0, it
must be installed such, that even in the event of rare incidents, ignition sources due to impact and
friction sparks are excluded.
Notes:
1. Installation must be in accordance with the Canadian Electric Code C22.1 and relevant local codes.
2. Measuring Module 2 may not be installed. As for ISC module and SENCOM module, only one
module is permitted to be installed at a time.
3. For Division 1 / Zone 0 installation, Sensor 1 and Sensor 2 may be simple apparatus, or intrinsically
safe apparatus with the following entity parameters. For Division 2 / Zone 2 installation, they may be
equipment suitable for Division 2 / Zone 2, or simple apparatus, or nonincendive field wiring apparatus
with the following nonincendive field wiring parameters.
Ui (or Vmax) ≥ Uo
Ii (or Imax) ≥ Io
Pi ≥ Po
Ci ≤ Co – Ccable
Li ≤ Lo – Lcable