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referencetemperatur (medietemperatur) på
omskifter REF og potentiometer REF
3. Mediefølertemperaturen T
S1
Målingen foretages mellem testpunktet T
og V
(0,1 V/°C)
REF
Evt. kan mediefølertemperaturen
registreres ved hjælp af en linieskriver, der
tilsluttes klemme 11-13
Hvis systemet pendler, kan man ved at
registrere pendlingernes periodetid finde frem
til, om det er proportionalforstærkningen K
der er for høj, eller integrationstiden T
for kort. Pendlingerne kan nu reduceres ved at
foretage korrektioner af T
og K
n
den registrerede periodetid T
p
Periodetid > integrationstid (T
A. T
øges til 1,2 x T
n
p
B. Vent, til anlægget igen er i balance
C. Hvis der stadig er pendling, reduceres K
med f.eks. 20% af skalaværdien
D. Vent, til anlægget er i balance
E. Ved stadig pendling gentages C og D
Periodetid < integrationstid (T
A. K
reduceres med f.eks. 20% af
p
skalaværdien
B. Vent, til anlægget er i balance
C. Ved stadig pendling gentages A og B
Funktionsudvidelser
Se fig. 8.
Ekstern alarm
Der er mulighed for at tilslutte eksternt alarm-
relæ med forsyningsspænding fra EKS 61.
Tilslutningen foretages over klemmerne 22-23.
Max. belastning 0,5 A, 24 V a.c.
Alarmudgangen er en triac brydefunktion
(NC).
Varmetrinsudgang
Der er mulighed for on/off regulering af et el-
varmetrin.
Tilslutning af elvarmetrinsrelæ foretages over
klemmerne 24-25. Max. belastning 0,5 A, 24
V a.c.
Varmetrinsudgangen er en triac sluttefunktion
(NO).
English
måles.
Regulation system
See fig. 2.
S1
The EKS 61 is an electronic temperature
regulator designed to control the temperature
of media in a refrigeration plant.
The EKS 61 is used with pilot valve CVQ and
Pt 1000 ohm temperature sensors.
,
Item list, EKS 61
p
, der er
See fig. 11.
n
1. T
. Measuring point for checking the
S1
i relation til
temperature of the medium at sensor S
p
.
2. T
. Measuring point for checking the
S2
temperature at the diagnostic sensor S
> T
= 4 min)
3. T
Measuring point for checking the set
p
n
REF.
reference temperature
4. V
(minus). Reference point for
REF
measuring points T
p
Measuring point for checking reference
voltage
5. V
. Measurement of voltage across NTC
NTC
in CVQ
< T
= 4 min)
6. 0 (minus) is used as a reference for V
p
n
and V
REF
7. Green ALARM signal lamp
Light
No light = ALARM/OFF
8. Red HEAT signal lamp
9. Red LIMIT signal lamp
10. Locking screws for insert
11. Switch REF. Setting of reference
temperature in steps of 10°C
12. Potentiometer REF. Fine setting of
reference temperature ±5°C
13. Potentiometer LIM. Setting of alarm limit
for temperature of medium
14. Potentiometer DEL. Setting of alarm delay
15. Potentiometer K
amplification
16. Potentiometer T
time
Technical data
Regulation range
–35°C ® +25°C REF
The unit regulates with an accuracy of £
±0.25°C in relation to the set REF
temperature.
Pl regulation produces, typically over/
undershoot, before the temperature of the
medium settles at the REF temperature.
Functions
1. LIMIT (alarm):
1 ® 5°C ±0.5°C on both sides of REF
2. DELAY:
15 ®120 minutes. Delay of alarm release
in relation to the time at which LIMIT is
exceeded
3. HEAT:
On/off regulation of a heating stage around
the lower LIMIT in relation to the REF
setting.
Regulation principle
Pl, proportional, integral regulation
Regulation parameters
Amplification factor K
Factory setting K
Integration time T
Factory setting T
, T
and T
.
S1
S2
REF
NTC
= EKS 61 ON
. Setting of proportional
p
. Setting of integration
n
= 2 ® 6
p
= 4
p
= 120 ® 360 seconds
n
= 240 seconds
n
134
Ambient temperature
for plastic case: –20°C ® +40°C
for silumin case: –20°C ® +45°C
for panel mounting: –20°C ® +50°C
Supply voltage
Stabilized 24 V a.c. +10%/ -15%, 50/60 HZ
Max. consumption: 2 VA
A class II transformer (in accordance with
CEE 15) must be used.
For CVQ + EKS 61 the max. consumption =
82 VA.
Grade of enclosure
1
IP 41 in plastic case
IP 54 in silumin case
.
2
Sensor
Pt 1000 ohm in accordance with DIN 43760
Media sensor S
for registering the
1
temperature of the refrigerated medium.
Mounting
See figs. 3, 4, 5, 6, 7, 8.
Important! When mounting the unit in a panel
or when building it into a cabinet the isolating
spacer must be removed first.
Fig. 7 shows the placing of media tempera-
ture sensor S
.
1
Connections
Connection of inputs
See fig. 8.
a. Media temperature sensor S
To be connected to terminals 20 and 21.
The Pt 1000 ohm sensor is fitted with 2.5 m
cable (2 x 0.20 mm²). If longer cable is
necessary, an extension can be made with
ordinary copper cable. However, it is
important that the total resistance of the
cable does not exceed 2 ohms. (2 ohms
correspond to a temperature variation of
0.5°C). See fig. 3.
b. CVQ feedback terminals 35 and 36
To be connected to terminals 6 and 8.
2
Min. 2 x 0.20 mm
cable must be used to
connect the feedback terminals on the
actuator and regulator.
c. Supply voltage
24 V a.c. +10%/-15%, 50/60 Hz to be
connected to terminals 2 and 4.
Connection of outputs
See fig. 8
a. External alarm
See „Function extensions"
b. Heating stage
See „Function extensions"
c. CVQ power terminals 77 - 78
To be connected to terminals 26 and 27.
The cable dimension between actuator
power terminals and regulator is determi-
ned by the length of the cable and its
resistance.
If several regulators are connected to the
same transformer, all must be connected in
parallel, i.e. terminal 2 to terminal 2,
etc., see fig. 9.
1
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