ckm105en2106h
1/3
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1. APPLICATION
The
NIVOCAP CK
capacitive level switches operate in the RF (radio-frequency) ~ 130 kHz range.
The instrument is less sensitive to material adhesions caused by the measuring probe's design and the so-called reference
probe-based operating principle. The device is capable of level switching in solids and powders with a dielectric constant
greater than 1.5 relative permittivity (
Ɛ
r) and to a limited extent in liquids (see 2.1 General data).
The device needs to be calibrated after it is installed.
During operation, the device evaluates the capacitance difference of the connected probe continuously. Until the probe is
in the air (the medium does not reach the probe) the measuring and reference probe is at the minimal capacitance value
(
ε
relative
=1) relative to the instrument housing. When the medium reaches the probe, the capacitance will increase
(
ε
relative
≥
1). The device measures the capacitance change relative to the reference value stored during the calibration
procedure.
The reference probe is designed so that the material deposits on the probe are ignored, preventing any false switching.
There are four measuring ranges switchable on the device (see Chapter 4: Sensitivity Ranges)
4
th
sensitivity range:
0.5 pF,
ε
relative
= 1.5…2.0
3
rd
sensitivity range:
2.5 pF,
ε
relative
= 2.0…4.0
2
nd
sensitivity range: 8.0 pF,
ε
relative
= 4.0…7.0
1
st
sensitivity range: 18 pF,
ε
relative
= > 7.0
2. TECHNICAL DATA
2.1
G
ENERAL DATA
Type
Standard
CK(D,G,M,P,H,N)–1
–1
CM(D,G,M,P,H,N)–1
–1
With Extension Rod
CK(R,L,E,F,V,Z)–1
–1,
CM(R,L,E,F,V,Z)–1
–1
With Extension Cable
CKK–1
–1
CKC–1
–1
Probe length
0.3…0.6 m (1.3…2 ft)
0.7…3 m (2.3…10 ft)
1…10 m (3.3…33 ft)
Material of wetted parts
1.4571 (316Ti) stainless steel + PPS insulation
1.4571 (316Ti)
+ PPS Insulation;
Cable: PE-coating
Process connection
As per order code (see 2.5 Order Codes)
Ambient temperature
(1)
–30…+65 °C (–22…+149 °F)
Medium temperature
(1)
(for solids)
–30…+110 °C (
−
22…+230 °F)
–25…+80 °C
(
−
13…+176 °F)
Medium temperature for
high-temperature version
(1)
(for solids)
–30…+235 °C (
−
22…+455 °F)
–
Medium temperature
(1)
(for liquids)
0…+65 °C (+32…+149 °F)
Max. process pressure
16 bar (1.6 MPa, 232 psi)
Response time (selectable)
0.15…15 sec
Power supply (universal)
20…250 V AC (50/60 Hz) or 20…50 V DC
Power consumption
2.5 VA / 2 W
Housing material
Powder-coated aluminum
Electrical connection
(1)
2× M20x1.5 plastic cable glands, for cable Ø6…Ø12 mm (.236"… .472"),
2× terminal blocks for 0.5…1.5 mm² (AWG20…15) wire cross section
Electrical protection
Class I.
Ingress protection
IP67
Weight 2
kg (4.4 lb)
2 kg + 1.4 kg/m
(4.4 lb + 1 lb/ft)
2 kg + 0.6 kg/m
(4.4 lb + 0.4 lb/ft)
(1)
For explosion-proof design, see section 2.3 Ex information
2.2
ACCESSORIES
User’s manual,
Warranty Card,
EU Declaration of Conformity,
2× 3-pole terminal blocks,
1 ½ " klingerit sealing, for BSP only
2× M20x1.5 cable glands
2.3
E
X INFORMATION
C
–1
–5E
X
,
C
–1
–7E
X
Reference document
Ex marking
ATEX
II 1/2D Ex ta/tb IIIC T85°C…T220°C Da/Db ckm1051m060bh_06
IEC Ex
Ex ta IIIC T85°C…T220°C Da/Db
ckm1051a0600h_02
Electrical connection
2× M20×1.5 metal cable glands for Ø8…Ø13 mm (Ø.315… Ø.5") cable
-
Thermal Properties
With extension cable
Standard, or with extension rod
CKK–1
–5, 7Ex
CKC–1
–5, 7Ex
CK(D,G,M,P,H,N)–1
–5, 7Ex
CK(R,L,E,F,V,Z)–1
–5, 7Ex
High-temperature version
CM(D,G,M,P,H,N)–1
–5, 7Ex
CM(R,L,E,F,V,Z)–1
–5, 7Ex
Medium temperature min.: –30 °C (
−
22 °F);
max.:
+60 °C
(+140 °F)
+70 °C
(+158 °F)
+80 °C
(+176 °F)
+60 °C
(+140 °F)
+70 °C
(+158 °F)
+95 °C
(+203 °F)
+110 °C
(+230 °F)
+220 °C (+428 °F)
Ambient temperature min.: –30 °C (
−
22 °F);
max.:
+65 °C
(+149 °F)
+60 °C
(+140 °F)
+65 °C (+149
°F)
+60 °C
(+140 °F)
+60 °C
(+140 °F)
+50 °C
(+140 °F)
+35 °C (+95 °F)
Highest permissible surface temperature
of the process connection
+80 °C
(+176 °F)
+90 °C
(+194 °F)
+80 °C
(+176 °F)
+90 °C
(+194 °F)
+95 °C
(+203 °F)
+195 °C (+383 °F)
Temperature
classes
T85°C T85°C T95°C T85°C T85°C T95°C T110°C
T220°C
2.4
O
UTPUT DATA
Relay
Solid-state output
C
–1
–1, C
–1
–5Ex
C
–1
–3, C
–1
–7Ex
Output type
SPDT (potential-free) SPST
(electronic)
Output rating
250 V AC, 8 A, AC 1
250 V AC, 50 V DC, 1 A
Output protection
—
—