Introduction; Instruction And Operation Manual For Atex; Year Of Manufacture; Function Of Equipment - Mettler Toledo 0745A Manual Del Usuario

1 Introduction

1.1

Instruction and Operation Manual for ATEX

This section covers only the ATEX-relevant aspects of the product.
Refer to 0745A ATEX certificate KEMA 03ATEX0169 or KEMA 03ATEX1070. When load cells are considered in type of protection non-
sparking Ex nA, they need to be fitted in an enclosure that complies with the equipment's of clause 6 of EN60079-15. With a permanent
marker place a mark (√) in the box on the load cell label to indicate the applicable protection (KEMA 03ATEX1069 or KEMA 09ATEX1070).
Once selected it may not be changed.
KEMA 03ATEX1069
II 2 G Ex ia IIC T4
II 2 D Ex tD A21 IP6X T100°C
Ui = 25V ; li = 600mA ; Pi = 1.25W
Ci = 5nF ; Li = 30µH
Ci = 2nF ; Li = 6 µH (0745A-SBK Only)
EN 60079-0 2006 ; EN 60079-11 2007
EN 61241-0 2006 ; EN 61241-1 2004

1.2 Year of Manufacture

The year of manufacture is indicated by the last character of the load cell Serial Number (S/N) as follows:
Last Character
Year

2 Function of Equipment

The 0745A can be used as category 2 or 3 equipment for hazardous Gas and hazardous Dust environments (Zone 1, 2, 21 and 22).

2.1 Details on Temperature Class / Coding

The following table shows the relationship between maximum total power Pi and maximum ambient temperature.
Temperature class/coding
T4 (gas)
T100°C (dust)

2.2 Connection

Color Code:
GREEN
BLACK
YELLOW
WHITE
RED

2.3 Information for Connections

a. The resistance between all safety ground connections and the system grounding electrode must not exceed 1 ohm.
b. If applying as intrinsically safe, the load cells must be interfaced with an approved safety barrier matching the entity parameter of the
load cells.
c. If applying as intrinsically safe, equipment connected to the safe side of the barrier shall not be powered by or generate more than
250VAC.
30214327F Load Cell 0745A
KEMA 03ATEX1070
II 3 G Ex nA II T4
II 3 G Ex nL IIC T4
II 3 D Ex tD A22 IP6X T100°C
Ui = 25V ; li = 600mA ; Pi = 1.25W
Ci = 5nF ; Li = 30µH
Ci = 2nF ; Li = 6 µH (0745A-SBK Only)
EN 60079-0 2006 ; EN 60079-15 2005
EN 61241-0 2006 ; EN 61241-1 2004
D E F G H J K
02 03 04 05 06 07 08 09 10 11 12 13 14 15 16
Ui = 20 V, Pi = 1.25W
- 40°C ≤ Ta ≤ 50°C
- 40°C ≤ Ta ≤ 50°C
+ Excitation
- Excitation
Shield
+ Signal
- Signal
L M N P Q R S T
3
Introduction