Apator Metra DKR 250 User manual

DKR 250
Installation and user manual 2018/02d
THERMOMETER WITH SWITCH
CONTACTS DKR 250
Description:
Available in two options: maximal and minimal.
Thermometer has two main parts head and stem.
Under the removable cap on the bac side, screw
clamps 1 and 2 are located. A protective clamp is
attached to the stem hexagon part. Temperature
sensor is attached to the end of the thermowell. In the
front screen is installed a regulation nob.
Adjustable pointer of maximal temperature is located
to the right from contact pointer.
Adjustable pointer of minimal temperature is located
to the left from contact pointer.
Applications:
DKR thermometer is designed to measure
temperature as a plant thermometer and to signal
when „desired temperature“ is reached. Thermowell
has to be used when DKR is in liquid or in humid
environment.
The maximum DKR thermometer is designed to
indicate the maximum temperature
The minimum DKR thermometer is designed to
indicate the minimum temperature.
Thermometer DKR must not be used as a safety element.
Installation:
Position of DKR is optional.
Installation has to be done according ČSN 33 2180
and connection to the elcetric circuit according to ČSN
34 0350 ed. 2 with a flat power cable 2x 0,5 mm2.
Tighten the clamp screws 1 and 2 with torque force no
more than 0,4 Nm.
Connect safety clamp with safety power cable to
safety power source.
Only specially traine person with qualification of
§ 6 Vyhlášky č.50/1978 Sb. (Czech law) can
perform DKR installation to power source.
Hea should be placed in an environment according
to ČSN 33 2000-1 ed.2, Attachment NM, Table 32-
NM1 with tolerated bias according to ČSN EN 60947-
1 ed.4
•temperature from -5°C to +40°C
•relative humidity up to 50% (at lower
temperatures may be higher, eg 90% at 20 °C)
•altitude up to 2000 m
•degree of pollution 3
•occurrence of solid objects AE1
•electromagnetic, electrostatic or ionizing effects of
AM1
•intensity of sunshine AN11
Stem can be placed accordingly:
•freely
•by inserting into the sliding threaded nec
screwed in the device
•by inserting into the thermowell soc et screwed in
the device
Immersion of thermometer:
•for measured range from –30 °C to +50 °C and 0
°C to +350 °C minimum immersion of 80 mm
•for other range minimum immersion of 60 mm
Thermowell has to be used it these cases:
•in measured place is static or dynamic pressure
•in measured place is harsh or aggressive
environment not suitable for stem alone
Seal the thermowell once installed in device with flat
ring 20x24 (20x26). Material choose according to use.
Technical Data
Scale ivision Scale range Measuring range Stem length [mm]
ø 8 mm [stainless steel (AKVS)]
100 160 250 400
1 °C -30 to +50 °C -20 to +40 °C x x x x
1 °C 0 to 120 °C +20 to +100 °C x x x x
2 °C 0 to 200 °C +20 to +180 °C x x x x
5 °C 0 to 350 °C +50 to +300 °C x x x x
1 / 2

DKR 250
Installation and user manual 2018/02d
Basic error of the thermometer ±2,5% of the range
scale
Weight approx. 440g
Protection IP 20
Operating voltage 250V
Minimum wor ing voltage 24V
Frequency 50Hz
Operating current 50mA
Connection recommended to use
flat cords
H03VH-H 2x0,5
(ČSN EN 5052-2-71
or
ČSN EN 5052-2-11)
Category of use ohmic load,
auxiliary relay
Lifetime 10 000 operating
cycles
DKR thermometer meets these technical standards:
EN 60947-5-1 ed.2 (35 4101), EN 60947-1 (35 4101),
ČSN EN 60529 (33 0330), ČSN 33 0360 ed.2, ČSN
33 2000-1 ed.2.
Function escription an commissioning:
Thermometer DKR 250, maximal version
Adjustable pointer of maximal temperature is located
to the right from contact pointer. When temperature
raises, contact pointer moves closer to adjustable
pointer. When switching temperature is reached,
contacts are connected.
Thermometer DKR 250, minimal version
Adjustable pointer of minimal temperature is located
to the left from contact pointer. When temperature
lowers, contact pointer moves closer to adjustable
pointer. When switching temperature is reached,
contacts are connected.
Set the desired switching (signalling) temperature
manually by adjustable indicator using a suitable
screwdriver.
Notice:
With the minimum DKR thermometer, set the pointer
to the lower temperature limit (-30 ° C, 0 ° C) before
the measured temperature drops below the set start-
up temperature (finished wor , device turned off, etc.).
Maintenance instructions:
If required inspect state of DKR thermometer,
contacts and power cables. If the thermometer is
damaged or contacts are wear off, then disconnect
the thermometer from power and do not use it any
more.
Storage con itions:
Thermometers must be stored in a dry room with a
maximum humidity of 70% and temperature from 0 °
C to 30 ° C, without sudden temperature changes.
The storage room must be free of harmful gases.
Handle it with extra caution, no shoc s at all.
Disposal:
Dispose it accordingly: Find recycle service to deal
with it.
Possible minor faults an their fix:
Minimum DKR thermometer with a long-term drop in
the temperature below the set temperature, may
deteriorate or even ruin the thermometer.
All DKR thermometer defects are removed exclusively
by the manufacturer.
Warranty:
Assuming that the product is placed, plugged and
used in accordance with the instructions found in the
user manual, the manufacturer provides a warranty
according to the law, unless otherwise agreed.
The manufacturer will refuse warranty service if the
device has been damaged:
•during transport and storage by the client,or
his/her customers
•when installing or disassembling to the client's
equipment, or his/her customers
•when improper handling and installation to a
device other than that specified in the instruction
manual
•if the DKR has been exposed to an environment
other than that specified in the manual
Warranty an post-warranty repairs
Warranty and post-warranty repairs are provided by
the manufacturer. Pac and ship the faulty product to:
APATOR METRA s.r.o.
Havlíč ova 919/24
787 01 Šumper
Czech Republic
Tel.: [phone]
Fax: [phone]
E-mail: [email protected]
www: http://www.metra-su.cz
2 / 2