9. Product Specifications
9-1. List of specifications
- 29 -
Material
SECC or SS304
Paint
Bake-coated with melamine
Outer color
Munsell 2.5Y9/2
＜
Gas minitoring SPECIFICATION
＞
Model
GD-F88Ai
Detection principle
Galvanic cell method
Gas to be detected
O2
Concentration display
7-segment LCD (4 digits)
Detection range
0～5vol%/0～10vol%/0～25vol%
Detection method
Diffusion type
Alarm preset point
Depend on measuring range
Indicate accuracy
(under an identical condition)
Within ±0.7vol%(below 25vol% range)
Within ±3vol%(above 25vol% range)
Response time
(under an identical condition)
Within 30sec(T90)
Gas alarm type
Two-step alarm (H-HH, L-H, and L-LL)
Gas alarm indication
Alarm message(AL1/AL2)
Gas alarm action
Latching or non latching
Trouble alarm･Self diagnosis
System failure/Sensor failure
Trouble alarm indication
Content display
Trouble alarm action
Non latching
Transmission method
2-wire analog transmission + digital transmission (HART
Communication)
Transmission specifications
4-20mADC (load resistance: 300Ω or less)
Communication scheme
HART 7
Power supply
24VDC±10%
Power consumption
Approx. 0.6W
Transmission cable
Shielded cable of CVVS, etc. (1.25mm
2
) - 2-core
Transmission distance
Up to 1km with CVVS 1.25 mm
2
(up to 600m between the detector
head and Zener Barrier)
Safety maintaining device
Zener Barrier (MTL7728ac//MTL7728-) or
insulating barrier (MTL5541/RN-221N-EJ/KFD2-STC4-Ex1)
Operating temperature
-10 - 40℃ (non-rapidly-vary)
Operating humidity
Less than 95%RH (non-condensing)
Structure
Wall mounted type
Explosion-proof structure
Intrinsically safe explosion-proof structure, with safety
maintaining device (barrier) used
Explosion-proof class
ExiaⅡCT4X
External dimensions
Approx. 100(W)x241(H)x48(D)mm (projection portions excluded)
Weight
Approx. 1.0kg
Material
SECC or SS304
Paint
Bake-coated with melamine
Outer color
Munsell 2.5Y9/2
