34
13
SPECIFICATION
6553 Gas Monitor
Approvals
CENELEC approved
EEx ia IIC T
amb
–20
C to +40
C
BASEEFA Certificate No. BAS 01 ATEX 7043
II (1)G
Ranges
(a) 80% or 85% to 100% H
2
in air
(b) 0 to 100% H
2
in CO
2
*
(c) 0 to 100% air in CO
2
*
Range Selector Switch Positions (when fitted)
1 – percentage by volume, hydrogen in air
2 – percentage by volume, hydrogen in carbon dioxide
3 – percentage by volume, air in carbon dioxide
Accuracy (display units)
0.25% of scale span
Ambient Temperature Range
0 to 45
C (32 to 113
F)
Power Supply
110/120V AC
or
200/220/240V AC, 50/60Hz
(two separate versions)
Power Consumption
30VA approximately
Outline Dimensions
290 x 362 x 272mm (11.4 x 14.25 x 10.9 in.)
Weight
12kg (26.4lb)
Environment
Sheltered interior, 0 to 90% RH
Outputs and Set Points
No. of relays
AK101 – Three (Two for H
2
Purity, One for Purge Gas)
AK102 – Four (H
2
Purity)
AK103 – Two (H
2
Purity)
AK104 – Two (H
2
Purity)
Relay contacts
Single pole changeover
Rating
250V AC
250V DC max.
3A AC
3A DC max.
Loading (non-inductive)
750VA
30W max.
(inductive)
75VA
3W max.
Insulation
2kV RMS contacts to earth (ground)
Remote range indication
Rating
250V AC
300V AC max.
150mA AC
150mA AC max.
No. of set points
AK101 – Three (Two for H
2
Purity, One for Purge Gas)
AK102 – Four (H
2
Purity)
AK103 – Two (H
2
Purity)
AK104 – Two (H
2
Purity)
Set point adjustment
Programmable
Set point hysteresis
1% fixed
Local set point annunciation
Red LED
Retransmission
No. of retransmission signals
AK101 – Two fully isolated (One for H
2
Purity, One for Purge Gas)
AK102 – Two fully isolated
AK103 – One fully isolated
AK104 – One fully isolated (H
2
Purity)
Output current
0 to 10mA, 0 to 20mA or 4 to 20mA programmable
Accuracy
0.25% FSD
0.5% reading
Resolution
0.1% at 10mA, 0.05% at 20mA
Max. load resistance
750
:
(20mA max.)
*
CO
2
standard option
Ar or N
2
also available
