12-8
IM 01E30D01-01EN
<12. OUTLINE>
12.4 NORMAL OPERATING
CONDITIONS
Ambient Temperature:
General-purpose Use:
–40 to +55°C (–40 to +131°F)
Explosion proof type:
In the case of explosion proof type, read descrip-
tion of “ Ambient Temperature” “Enclosure” in
“HAZARDOUS AREA CLASSIFICATION”
*1: Minimum temperature should also be limited according
to minimum fluid temperature of flow tube’s specifica
-
tion.
Read description of “Fluid Temperature and Pressure”.
*2: Indicator operating range: –20 to +55°C (–4 to +131°F)
Ambient Humidity: 0 to 100%
Lengthy continuous operation at 95% or more is not
recommended.
Fluid Conductivity:
Size 25 to 200 mm (1 to 8 in.): 10 μS/cm or larger
Note: Fluids with large flow noise (pure water, fluids with
low conductivity and low viscosity such as alcohol)
cause the output fluctuation and therefore it is impos
-
sible to measure accurately.
Output Fluctuation:
The output fluctuates depending on the fluid condi
-
tions and damping settings.
The following table shows the output fluctuation as
a rough guideline at flow velocity near 100% of flow
span (damping: 5 s)
• Size 25 to 100 mm (1 to 4 in.)
Fluid
Conductivity
[μS/cm]
Fluctuation (% of rate) as a rough guideline
Flow Span
2.0 m/s
Flow Span
4.0 m/s
10
3.0% or less
7.0% or less
50
1.0% or less
1.0% or less
100
0.5% or less
0.5% or less
500
0.5% or less
0.5% or less
• Size 150 to 200 mm (6 to 8 in.)
Fluid
Conductivity
[μS/cm]
Fluctuation (% of rate) as a rough guideline
Flow Span
2.0 m/s
Flow Span
4.0 m/s
10
5.0% or less
Non-recommendation
50
2.0% or less
3.0% or less
100
1.0% or less
1.0% or less
500
0.6% or less
1.0% or less
Measurable Flow Rate Range:
SI Units (Size: mm, Flow rate: m
3
/h)
Size
(mm)
0 to Min. Span Flow
Rate (0.3 m/s)
0 to Max. Span Flow
Rate (10 m/s)
25
0 to 0.5302 m
3
/h
0 to 17.671 m
3
/h
40
0 to 1.3572
0 to 45.23
50
0 to 2.1206
0 to 70.68
65
0 to 3.584
0 to 119.45
80
0 to 5.429
0 to 180.95
100
0 to 8.483
0 to 282.74
150
0 to 19.090
0 to 636.1
200
0 to 33.930
0 to 1,130.9
English Units (Size: in., Flow rate: GPM)
Size
(in.)
0 to Min. Span Flow
Rate (1 ft/s)
0 to Max. Span Flow
Rate (33 ft/s)
1.0
0 to 2.335 GPM
0 to 77.80 GPM
1.5
0 to 5.253
0 to 175.0
2.0
0 to 9.337
0 to 311.2
2.5
0 to 14.59
0 to 486.2
3.0
0 to 21.01
0 to 700.2
4.0
0 to 37.35
0 to 1244
6.0
0 to 84.03
0 to 2800
8.0
0 to 149.4
0 to 4979
Fluid Temperature and Pressure:
The following figure shows maximum allowable fluid
pressure for the flowtube. Further fluid pressure
should also be limited according to flange rating.
F1206.ai
25 to 50 mm (1.0 to 2.0 in.)
(flange type, wafer type)
65 to 200 mm (2.5 to 8.0 in.)
(flange type, wafer type)
Pressure
MPa (psi)
4 (580)
2 (290)
1 (145)
−
0.1 (-14.5)
−
40
(-40)
0
(32)
40
(104)
100
(212)
Temperature °C (°F)
−
10
(14)
130
(266)
*1
*1: For wafer types of 40 to 200 mm (1.5 to 8.0 in.), and for
carbon steel flange types (process connection code:
C**) of 150 to 200 mm (6.0 to 8.0 in.), the minimum fluid
temperature is –10°C (+14°F).
*2: For fluid temperature of the explosion proof type, read
descriptions of “HAZARDOUS AREA CLASSIFICA-
TION”.
Vibration Conditions:
9.8 m/s
2
or less (frequency of 500 Hz or less)
Note: · Level of vibration is in conformity with IEC 60068-2-6
(SAMA 31.1-1980).
· Avoid locations with much vibration where the pipe
vibration frequency is 500 Hz or more. Such a condi-
tion may cause damage to the instrument.
