Ditel KOSMOS Series Manual

KOS203P
PUSH BUTTON
PT100
30727091
WARRANTY
The instruments are warranted against defective materials and
workmanship for a period of three years from date of delivery.
If a product appears to have a defect or fails during the normal use
within the warranty period, please contact the distributor from which
you purchased the product.
This warranty does not apply to defects resulting from action of the
buyer such as mishandling or improper interfacing.
The liability under this warranty shall extend only to the repair of the
instrument. No responsability is assumed by the manufacturer for
any damage which may result from its use.
SERIE KOSMOS

1.0 DESCRIPTION

The KOS203/P head mounted temperature transmitter connects to any
standard pt100 resistance sensor and converts the linearised temperature
to a (4 to 20)mA signal. The transmitter is a two wire device, and is fully
configurable by the user, over a wide temperature range, with the aid of a
simple push button. This new KOS203/P design incorporates additional
configuration menus, allowing the user to push button trim the transmitter
output at both zero and span, ideal for trimming out sensor errors. The
transmitter advanced circuitry guaranties high stability over the wide
operating ambient temperature ranges experienced by head mounted
devices.
One of the transmitters features is the program LED, wich provides visual
indication of sensor fault when in normal operation and is also used to
guide the operator through the simple menus during configuration.

2.0 SPECIFICATION @20 C

2.1 INPUT

Sensor type
Sensor range
Sensor connection
Minimum span (see note 1)
Linearisation
Accuracy (see note 2)
Thermal Drift
04-07-07
Excitation current
Lead resistance effect
Maximum lead Resistance
Note 1 Any span may be selected, full accuracy is only guaranteed for
spans greater than the minimum recomended span.
Note 2 Basic measurement accuracy includes the effects of calibration,
linearisation and repeatability.

2.2 OUTPUT

Type
Limits
Accuracy
Loop effect 0.2 A / V measured @ 50Hz 1V (peak to peak)
Thermal drift
Max load

2.3 GENERAL

Update time
Response time
Start up time
Filter factor
Ambient Temperature
Connection
Approvals
Factory Default (0 to 100) ºC upscale burnout (0.0ºC user trim)
Pt 100 100 @ 0ªC 2 or 3 wire.
(-200 to 850) ºC (18 to 390)
Screw terminal
25ºC
BS EN 60751(IEC 751) standard / JISC1604
0.1ºC 0.05% of Reading
0.0025% / ºC
<200 A
0.002 ºC/
20 per leg
Two wire (4 to 20) mA sink
Low 3.8 mA; high 21.5 mA
(mA out/2000) or 5 A which ever greater
1 A/ºC typical; 1.5 A Max
[(Vsupply-10)/20]K
0.5 Seconds
1 Second to reach 90% of final value
From power up typically 5 seconds
Adaptive
(-40 to 85) ºC
Screw terminal
BS EN 61326;1998 - Electrical
equipement for measurement
and control ANNEX A; ANNEX F

3.0 INSTALLATION

3.1 Mechanical

The KOS203P transmitter has been specifically designed to fit inside a
DIN standard probe head enclosure, which provides adequate protection
from moisture, dust, corrosive atmosphere, etc. All cable entries must be
sealed using the correct size gland. Likewise any probe assembly fitted
must be sealed. Care must be taken when locating the transmitter to
ensure the working ambient temperature range of (-40 to 85)ºC is not
exceeded. The KOS203P enclosure has a centre hole allowing the sensor
wired to enter screw terminals from transmitter centre, ths is applicable
when the sensor is mounted directly below the transmitter.
SIDE
Ø 43.0 mm
33.0 mm
CENTRES
21.0 mm
Mounting holes: two holes 5.5mm diameter, 33mm centres
Centre hole sensor wire entry: 4mm

3.2 Electrical

Electrical connections to the transmitter are made to the screw terminal
provided on the top face. The sensor wires must be equal length and
type for the lead compensation to work correctly. The screw terminals
allow for wires to enter either inner oor outer direction. The transmitter
is protected against reverse connection and over voltage. If no sensor
(input) connection is made the transmitter will go into either up or down
scale output current, depending on configuration.
Figure 2 gives connection details, the output is shown connected to a
24V supply. The load symbol represent any other device connected in
the loop, such as Monitoring equipement, panel indicators and loop
isolators. The load value can range from 0 ohms to the max loop load
for given supply, refer to section 2.2 Max load for more information.
The transmitter comforms with EC directive BS EN 61326:1998 when
correctly installed in a termination head proving at least IP20 protection
and with sensor wires less than 3 metres. Screened or twisted pair
wires are recommended for output wires. Always ensure the (4 to 20)
mA loop is grounded at one point, ths would normally be at the
monitoring equipement or loop power supply.
In normal operation the program LED act as over-range LED
Figure 2
White
Pt 100
Red
Load
Red
BASE
+
Power
U
Supply
-