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7. Starting, operation
Specifications
Model F-20, F-21
Pressure ranges
bar
Over pressure safety
bar
Burst pressure
bar
Pressure ranges
bar
Over pressure safety
bar
Burst pressure
bar
{Vacuum, gauge pressure, compound range, absolute pressure are available}.
Only model F-20.
1)
2)
For model F-21: the value specified in the table applies only when sealing is
Specifications
Model F-20, F-21
realised with the sealing ring underneath the hex. Otherwise max. 1500 bar applies.
Materials
Wetted parts
„
»
F-20
»
F-21
Case
„
„
Electrical connection
Internal transmission fluid
3)
Not for model F-20 with pressure ranges > 25 bar (300 psi).
3)
„
Power supply U+
DC V
Signal output and
R
in Ohm
A
maximum ohmic load R
A
10
WIKA Operating instructions / Betriebsanleitung
0.1
0.16
0.25 0.4
0.6
1
1.6
2.5
4
1
1.5
2
2
4
5
10
10
17
2
2
2.4
2.4
4.8
6
12
12
20.5 42
25
40
60
100 160 250 400
600
50
80
120 200 320 500 800
1200
96
400
550 800 1000 1200 1700
2)
2400
(Other materials see WIKA diaphragm seal program)
Stainless steel
Stainless steel
O-ring: NBR {FPM/FKM}
Stainless steel
With internal spring clip terminal; cross section max. 2.5 mm
ground terminals internal for brass nickel-plated and
{stainless steel} and {stainless steel conduit} threaded connection
Synthetic oil
10 ... 30 (14 ... 30 with signal output 0 ... 10 V)
(11 ... 30 with signal output 4 ... 20 mA)
4 ... 20 mA, 2-wire
R
≤ (U+ – 10 V) / 0.02 A
A
≤ (U+ – 3 V) / 0.02 A
0 ... 20 mA, 3-wire
R
A
0 ... 5 V, 3-wire
RA > 5000
0 ... 10 V, 3-wire
RA >10000
F-20, F-21
GB
7. Starting, operation
Specifications
6
10
16
Test circuit signal / maximum ohmic
35
35
80
load R
A
42
96
Adjustability zero/span
1000
1)
Response time (10 ... 90 %)
1500
Insulation voltage
2)
3000
Accuracy
4)
Non-linearity
Non-repeatability
1-year stability
Permissible temperature of
„
Medium
„
Ambience
2
„
Storage
;
Compensated temp range
Temperature coefficients within
compensated temp range
Mean TC of zero
„
„
Mean TC of range
CE- conformitiy
Pressure equipment directive
„
WIKA Operating instructions / Betriebsanleitung
Model F-20, F-21
{Other signal output on request}
Only for instruments with 4 ... 20 mA signal output;
R
< 5 Ohm with 20 mA
A
±
%
5 using potentiometers inside the instrument
ms
≤ 1
DC V
500
% of span
≤ 0.5
{0.25}
5)
4)
Including non-linearity, hysteresis, zero point and full scale error (corresponds to
error of measurement per IEC 61298-2).
Adjusted in vertical mounting position with lower pressure connection.
Accuracy { } for pressure ranges ≥ 0.25 bar (100 INWC).
5)
% of span
≤ 0.2
(BFSL) according to IEC 61298-2
% of span
≤ 0.1
according to IEC 61298-2
% of span
≤ 0.2
(at reference conditions)
-30 ... +100 °C {-40 ... +125 °C
6)
} -22 ... +212 °F {-40 ... +257 °F
-20 ... +80 °C {-30 ... +105 °C}
-40 ... +100 °C
Response time for model F-20: ≤ 10 ms at medium temperatures below < -30 °C
6)
(-22°F) for pressure ranges up to 25 bar. Response time for model F-21: ≤ 10 ms at
medium temperatures below < -30 °C (-22°F).
0 ... +80 °C
% of span
≤ 0.2 / 10 K (< 0.4 for pressure range
≤ 0.2 / 10 K
% of span
This instrument is a pressure accessory as defined by the directive
97/23/EC
F-20, F-21
GB
6)
}
-4 ... +176 °F {-22 ... +221 °F}
-40 ... +212 °F
+32 ... +176 °F
≤
250 mbar (100 INWC))
11
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