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kayden.com Online Store
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Thermal Dispersion
Quick Setup Guide
kayden.com Online Store
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ANNIVERSARY
2022
1994
Kayden Instruments
3364–114th Avenue S.E. Calgary, Alberta, Canada T2Z 3V6
Tel:
+1 403 253 1423
Web:
kayden.com
DOC#: QG-800-004
Effective: March 2022
Supercedes: September 2021
POWER, AC/DC
Either AC or DC voltage can be used to power the
CLASSIC:
•
For AC power, connect the HOT line to VAC-H,
the NEUTRAL to VAC-N and the GROUND wire to
the green grounding screw, also indicated by the
ground symbol.
•
For DC Power, connect the positive voltage to
+VDC and the common or negative to COM.
CAUTION
Never power on the circuits in a potentially explosive area
without fi rst installing the enclosure cover.
Always lock the cover in place. This may be required by
your local safety or electrical code.
NOTE:
For fail-safe installations, the desirable relay
state is usually energized and the circuit closed. Use
the normally open contacts for fail-safe installations
since they are closed when the relay is energized.
MAINTENANCE
Your Kayden instrument requires very little maintenance
as there are no moving parts.
Without detailed knowledge of the environment
parameters of the application surroundings and process
data media, we cannot make specific recommendations
for periodic inspection, cleaning, or testing procedures.
we do however suggest general guidelines for
maintenance (see the CLASSIC Product Manual). Use
operating experience to establish the frequency of each
type of maintenance.
CALIBRATION
The CLASSIC does not require any calibration for
use as a switch/transmitter. Once properly setup,
the CLASSIC will be as stable and repeatable as the
process in which it is installed. It may be necessary
to check or repeat the setup procedure if the process
changes dramatically over time.
HEATER POWER
The CLASSIC uses a constant power heater (2 Watt
maximum), that can be set between 0 - 100% in 5%
increments.
•
Since the energy added by the heater is used
in determining the Thermal Signal, altering the
amount of heat changes the Thermal Signal.
•
If the heater power is changed more than 5% (1
LED) this may require the 0% & 100% Thermal
Signal to be similarly adjusted in order not to lose
sensitivity and reaction time.
•
The Factory Default Heater Power setting of 75%
(1.5 watts) is suitable for most Flow applications
with Hydro-carbons.
•
RECOMMENDED HEATER POWER SETTINGS:
•
30 - 60% heater power (7-13 LEDs)
-
Air or Gas (Flow) (depending on velocity)
•
60 - 75% heater power (13-16 LEDs)
-
Oil or Hydrocarbon based liquids (Flow,
Level & Interface)
•
80 - 100% heater power (17-21 LEDs)
-
Water or non-viscous liquids (Flow,
Level & Interface)
The faster the flow rate (velocity) the more heat
required. In level applications the amount of heat, in
part, determines the reaction time.
The CLASSIC 800 Series has a “Smart Heater” function
(see the
“Classic 800 Product Manual”
). If a heater
operates constantly in a no flow or dry condition, a
“Thermal Offset” can occur. This means the heater
may affect the reading from the reference RTD. The
microprocessor will automatically reduce the heater
power setting to a lower power rating when the probe
is “dry” or in a “no-flow” condition. When the process
media touches the sensors, or flow begins again, the
original heater power setting is restored.
!
RELAY OUTPUTS
The CLASSIC features two independent set points
each with its own mechanical relay for output. The
connections for the contacts of these relays are:
R1COM
Common or pole contact for Relay 1
R1NC
Normally closed contact for Relay 1
when the coil is not energized
R1NO
Normally open contact for Relay 1
when the coil is not energized
R2COM
Common or pole contact for Relay 2
R2NC
Normally closed contact for Relay 2
when the coil is not energized
R2NO
Normally open contact for Relay 2
when the coil is not energized
QG-800-004-[014]
This is a Controlled Document and cannot be changed without the Approval of the Quality Control Manager.
