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Athena
6000/6200
Microprocessor-based Temperature Controller
Designed for the user
Athena’s
unique
new
6000
microprocessor-based controller
was developed to satisfy the needs
of actual end users, designers, and
specifiers. Data was gathered on
the temperature controller features,
functions, and performance capabilities that they desired. Then
Athena designed a controller to
satisfy them.
Dual
lndication
Now you can compare process
temperature and setpoint
at a
glance - hands free. This dual
digital
display concept has formerly
only been available in high priced
multifunction process controls.
Microprocessors reduce size,
add extras
By using microprocessor
hardware and a highly sophisticated
software package, Athena designers
and engineers have included more
features than have ever been
available before in a controller this
size. Incorporating two digital
displays, touch-key
operation,
software
linearized
and
stabilized
thermocouple input with 3-mode PID
action heat/cooling control and dual
alarms,
ºF to ºC
conversion,
alarms
that can be energized for temp
rise/fall
and selectable as process
or deviation type, and a program
restart circuit that eliminates
program lock-up due to transient
voltage
spikes
or line voltage
“brown out.” Program automatically
restarts within 2
milliseconds
after
condition passes.
PID
Control
Three mode (Proportional,
lntegral, and Derivative) action
eliminates offset (droop) as cooling
and heating requirements change in
the process, and provides fast
output response to rate of change
and reduces temperature overshoot
and undershoot.
Thermocouple linearization
The 6000 has a program to
linearize signal input from the
thermocouple. Without it, temperature controllers have accurate
temperature indication over only
certain
portions of the scale.
Contents
General:
Introduction
Configuration:
Output Forms
Alarm Types
ºC/°F
Installation
lnstructlons:
Unpacking
Locating
Mounting
Terminal Designations
Output Modules
Wiring Examples
Internal
Switches
Thermocouple lnstallation
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2
4-5
4-5
4-5
5
5
5
6
6-7
6-9
10
11
Operating Instructions:
Control Panel Description
Start-up
Parameter Entry
Heat Galn Setting
Rate
Setting
Examples
Cool Gain
Setting
Trouble Shootlng
Repairs and Warranty
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13
13
13-14
15
15
15
15
16
16
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Specifications
Inputs:
Line
Voltage
Sensor
Power
consumption:
Ranges
available:
Accuracy:
Temperature
stability:
Cold end
tracking:
Operating ambient
for
rated accuracy:
Maximum lead
resistance for rated
accuracy:
Series
mode noise
rejection:
Common mode
noise
rejection:
T/C break
protection:
Dual display:
Display update rate
and filtering
ºF/ºC:
Alarm 1 & 2:
Outputs:
- B
Relay (time
proportioning)
-F Current
proportional
-S Pulsed
voltage
-T
Triac
(time
proportional
-
E1 & E2
Auxiliary
alarm relays
(on/off)
Filtered
LED
display:
T/C linearization:
Connections:
Dimensions:
Mounting:
Weight:
Recorder output:
(RTD
only)
120/240
Vac
50,60
Hz
T, J or K thermocouple or Platinum 100Ω at 0°C
Less than 6 VA (Instrument)
J couple 0-1400°F (0-760%)
K couple 0-2000°F (0-1093ºC)
±1 digit of full scale
5 µV/ºC Max 3 µV/ºC typ.
0.05ºC/°C ambient
0 to 55%
Thermocouple: 100Ω
RTD: 10Ω/lead
60 dB
120 dB
upscale standard
Process temp displayed continuously; setpoint or other
parameters updated on lower display
Greater than 5 times per second.
Analog and digital filtering techniques increase stability of
process & display.
Internal switch selection-process, setpoint and alarms
affected.
Adjustable over full range of control. LED displays alarm
status. 3 amp relay at 120 Vac normally open contact.
Reverse acting relay by switch selecting or low alarms.
Process/deviation mode selectable (internal switch).
Available heating only or heat/cool
SPST relay 7 amps resistive at 120 Vac, 5 amp resistive
at 240 Vac, 50 VA inductive
4-20 mAdc into 500 ohm max.
0-20 Vdc pulsed time proportioning signal for driving solid
state relays 500 ohms maximum input impedance
Solid state plug-in triac output. Rated 1 amp holding &
10 amps inrush
SPST relays, rated 3 amps at 120
Vac
4 digits for process, 4 digits for parameters.
Continuously calculated and updated using rom based
algorithm.
Inputs and outputs vla barrier strips with U.L. approved
Iocking sems terminals.
Front panel: 96mm x 96mm x 22mm
Case: 92mm x 92mm x 118mm
Depth behind panel: 96mm (approx. minus panel thickness)
Channel slides and screws
2 lb
1 mV/ºC for degree reading unit
0.1 mV/ºC for 1 10 degree reading unit
3
+10
-15%
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Front Panel Adjustments
Touch Key
Index:
Allows the following adjustments to be selected.
1) set
point temperature 0 to span
2) alarm one temperature setting 0 to span
3) alarm two temperature setting 0 to span
4) rate with tracking reset (1:6ratio) ** 0 to 120 sec
5) heat gain *** 1 to 400
6) heat cycle time * 1 to 120 sec
7) cool gain *** 1 to 400
6) cool cycle time * 1 to 120 sec
up/down keys: increases/decreases values of above adjustments
writes selected values to
nonvolatile
memory
Enter:
Internal switches/jumpers
A) 4 position dip switch
1) selects ºF/°C display
2) selects energized alarm two on hi/low (dev + / dev -) temperature
3) selects energized alarm one on hi/low (dev + / dev -) temperature
4) selects process or deviation alarm function
B) 2 position dip switch
1) selects reduced rate gain
2) locks out front panel parameter entry excepting set point
NOTES: *** setting to zero disables output
* setting to zero initiates 60 millisecond timebase for ultra fast cycling.
Use with external solid state relays.
**Setting to zero disables reset and rate actlon for proportional only control.
To order see price sheet C-5-82
General
Congratulations on
purchasing
an
outstanding
temperature controller Ingenious use of
microprocessor technology has given you an
economical, compact controller that:
1.
2.
3.
4.
5.
Accurately measures, linearizes and displays
temperature in
ºF
and
ºC.
Digitally
enters and displays control and alarm set
points
as well as heat and cool
gains,
cycle times,
and user simplified rate and reset action.
Can be switched
configured
for
high
and low
process alarms or deviation
alarms.
Can be field converted from relay output “B”, to
solid state relay "T" to solid state relay driver "S"
or to a 4-20 MA output SCR driver "F", with
independent outputs for heat and cool.
Will remember its “entered” settings after power
failure or shut-off and not “Go To Sleep”.
CAUTION: HIGH VOLTAGE AND HIGH TEMPERATURES CAN
CAUSE INJURY AND ARE A FIRE HAZARD. PLEASE READ
ALL INSTRUCTIONS, HAVE ONLY SKILLED PROFESSIONALS
WIRE THE
UNIT,
AND USE AN APPROVED TEMPERATURE
AND/OR PRESSURE SAFETY CONTROL. EVEN THE BEST
COMPONENTS CAN BE DAMAGED OR MAY NOT FAIL SAFE.
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x
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Output Modules
Module Type F:
Module Type T:
Module Type S:
times less than ten seconds will drastically shorten
relay
life
and in no case should the cycle time be set to
zero (60
millisecond time
base). Normally open
contacts are provided for both
heating
or
cooling
use.
NOTE:
Do not use
this
output module
with mechanical
contactors
because they generate an excessive
EMI
field which
can
lnterfere with
other controllers. Instead
we recommend "T" output modules for this applicatlon.
This 4-20
mA output module can deliver full output to
loads having an input Impedance of 500 OHMS or less.
The cycle
time setting
must be ZERO for smooth
current output.
A push-on
terminal
is
utilized
as a return for ground
currents of the
milliamp
source. It is connected
Internally to the mating lug on the heatsink. To avoid
ground loops, drive floating (ungrounded) loads or use
isolated thermocouples.
This solid state relay is capable of 1 AMP at
120/240Vac.
It is zero voltage switched and optically
isolated from the
drive signal.
With
it,
resistive loads
up to 120 watts at 120Vac and 240 watts at 240Vac
may be controlled
directly. Using direct
control there
is no lower
limit
on the cycle time
setting
(down to
60
milliseconds).
Larger loads may be controlled
utilizing
an external
contactor. In this case, It is
advisable
to use cycle
settings of ten seconds or greater to
minimize
contactor wear. External suppresslon of the contactor
is
advisable
if
EMI
becomes a problem.
Similar
to F, but pulsed
20V/20mA
DC output for
driving
solid state relays. Up to 6 (series input
connected) solid state relays can be used.
Cycling
time
(HC)
can be set to
optimize
the load response
time
requirements
without sacrificing relay life.
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Installation Instructions
variable, the probe should be close to the work area.
Some experimenting with probe location is often
needed to find its optimum position.
In a bath process, the addition of a stirrer will help
to eliminate thermal lags. Since the thermocouple
is
basically a point measuring device, putting more than
one thermocouple in parallel will provide an average
temperature reading and produce better results In air
heated processes.
NOTE:
if controls
with “F”
or
"S” outputs
drive loads
with grounded or hot input terminals (not floating), an
isolated
thermocouple must be used. Otherwise, when
both input
and
output
are grounded, severe ground loop
currents will
result,
causing errors and permanent
controller damage.
Standard thermocouple limits of error are
± 4ºF
or
0.75%
(half that for special) plus drift caused by
improper protection or over temperature. This is far
greater than controller error, but can not be corrected
at the sensor except by selection and replacement. In
extreme case, total system requirements can be met by
offsetting the control to compensate for these outside
errors.
Operating Instructions
Control Panel Description
Continuous
Display Of
Process
Continuous
Display
Of
Setpoint
Or
Indexed
Parameter
Touch Key Group
Pressing
The
“I”
Button
Advances
The Cursor In The
“Index” Group
LED To
indicate
Output “Status"
Function Selected
Indicated
By LED
“Cursor”
Advanced By “I”
Button
Enters The
Selected
Value T
O
Nonvolatile
Memory
Raises
(lncreases)
Lowers
The Selected
(Decreases) The
Variable
Selected Variable
12
Variable
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Operating Instructions
Start-Up
Before line voltage is applied, double check all items
connected to controller: T
he correct type thermocouple
(see section on thermocouples, p. 11) must be on
terminals 1 and 2 (red on 2) with no AC or DC voltage
leading
or arcing to it. Proper terminals selected for
line voltage (8 & 10 for 240V). No heater shorts or
shorts to ground. No exposed bare wires or frayed
insulation.
On very fast processes heaters should be temporarily
disconnected to give operators familiarization time
without exceeding safe temperature limits of the
process.
Set point: Apply power. After allowing a few seconds
for initialization, the upper display will indicate
thermocouple temperature at the process, the lower
display
wil
show set point temperature, and the index
indicator illuminates set point (SP). The status (output)
indicator will pulse with a greater “on” time as the
difference between actual process temperature and set
point widens, and at lesser “on” time as the difference
narrows.
To establish a setpoint, first make sure the index
memory, depress the “enter” key E. Display will blink.
Alarms: Depress index key
(I)
until index indicator
lights at (Al). Now set alarm one trip point by up or
down keys as before. Enter (E). If configured as
deviation tracking alarm, the lower display shows
difference between set point and the point where alarm
is triggered. (See p. 10 to select alarm functions).
Depress index key
(I)
again and advance to alarm 2
(A2). Set as above.
Rate: Advance index to rate (RT). This is the rate
(differential or anticipating) action adjustment,
calibrated in seconds. It is software connected to
automatic reset (integral or droop correcting) action,
which automatically tracks rate.
This wide range, high resolution, single button entry
T
greatly
simplifies tuning the control to the process.
emporarily
run it down to zero (proportional only) and
enter (E).
Heat
Gain:
Heat gain
(HG),
the next index position,
sets controller gain for heat control. It is the inverse of
proportional band (P.B.) which can be calculated as
ºP. B. = Full Scale º/Gain. At HG = 0, heat is off.
Temporarily set HG = 400 or about
3.5º
prop. band on
“J”
couple units, 5º on
“K”.
Proceed to set the next
parameter.
Heat cycling (HC) is next. It should be set to the
longest possible cycling time in seconds (depending on
the mass of process) for increased life expectancy of
relays. 15 to 30 seconds for massive loads, 10 to 15 for
fast loads when relay driven. "T” output solid state
13
light is still on (SP). Then depress the UP button to
increase the value shown in the lower display, or the
DOWN button to decrease it, until the desired setpoint
is reached. To retain this parameter in the non-volatile
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Operating Instructions
Tuning
Heat Gain
Heat Gain
(HG) Setting
Rate
(RT)
Setting
(includes reset)
relays directly connected to small heaters,
0-5
sec., but
not faster than 10 sec. when driving
mechanical
contactors.
“S” solid state contactor drivers can be
used
0-10
sec.
“F” mA
output units must be set to
HC = 0, less than 1 sec.
CG Is cooling gain. If no cooling is used, set it to
100, and enter. If cooling is employed, start at CG = 400
and follow procedure to set HG.
The final index position is used to set cooling
cycling (CC) time. On all "T" output units, C = 0. Other
outputs are dictated by the type of cooling method
employed. Mechanical compressors may
require
2 minutes, liquid pumps 30 seconds,
solenoid
valves
5-15
seconds, small fans 5 seconds, large ones 30.
Decide, set and enter (E) to lock in value. Then move
index back to "SP".
Connect power to heater and observe temp. rise. Run
set polnt down to meet process. Heat output will start
proportioning within a few degrees of process
temperature, and cool will proportion once SP is below
process.
An ideal process would glve perfect results with
highest controller gain. Practically speaking however,
heaters are overpowered, have stored heat and poor
coupling, loads have multiple delays, and the sensor
reading lags behind the heating output status. A
controller must be tuneable to process characteristics
in order to compensate for the deficiencies of the rest
of the system. The Model 6000 has been designed so
that it does this and still remains easy to operate.
1.
2.
3.
4.
5.
1.
2.
3.
4.
5.
Fix set polnt (SP) at the desired process
temperature. (If overshoot can not be tolerated
durlng set-up, use
20-30%
lower temp.)
Set heat gain (HG) at 400. Record the range of
temperature oscillations around the set point. Note
their durations.
Reduce gain by half (200).
Observe and note
osclllatlon (if any).
Repeat this halving procedure until temperature
is stable.
Push (E) to enter. You have now compensated for
heater power and number of lags, but a droop
between set polnt and process exists.
Set rate (RT) to 01 seconds for fast systems, 05 for
slow, 10 seconds for massive.
Observe oscillation building up and record the range.
Double rate time. Observe oscillation.
Repeat the doubling procedure until the process
stabilizes again.
Then enter (E).
You have now optimized rate and reset times for the frequency response of
the process. If time permits, finer adjustment can be made. For faster start-up
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Operating Instructions
(with some overshoot) reduce rate time 10-20%. For more anticipation (giving
undershoot) increase rate slightly. Experiment with (HG) settings.
EXAMPLES OF PARAMETER SETTING ON TWO PROCESSES
Process A: Slow, 2 lag process, matched power, 200º set point.
HG RT
TEMPERATURE
REMARKS
409 00 197º-199º Process shows 2º oscillation, 2º average droop -
cut gain setting in half.
200 00 196º
200 05
200 10
200 20
200 40
194º-206º
199º-201º
200º
198º-202º
Process is stable, Gain O.K. but 4º droop-requires
addition of rate-add 05 for slow process.
Process shows 8º slowing oscillation, reset is
hunting, double RT to 10.
Almost -double RT value again.
Good-process is stable. Double again to see if we
can improve.
Now process is showing 4º faster (rate) "hunting”.
Back up again. RT = 20.
Process B: Fast, 3 lag, overpowered process, 400° set point.
HG
RT
TEMPERATURE
REMARKS
409 00 389º-435º
25 00
375º-391
12
00
384º
12 01
371º-435º
12
02
396º-404º
12
03
400º ±
12
04
400º
Process
oscillates,
wild, skip to much less gain.
With 16º oscillation, 17º droop- galn should be cut
Gain O.K., 36º droop- now add RT = 1 for fast
process.
Need more rate tlme-double to 2.
Getting
close-add a little more.
Good-add a
little
more to see if we can
improve.
Optimum
Low gain requirement
indicates
poor thermal
coupling
or overpower.
Special
problems can be caused by very noisy
by systems havlng a pure dead time between
turbulent flow processes or
heat application and
temperature measurement. In both cases, rate is
likely to continuously
overreact. Unplug unit and set internal switch to reduced rate gain. (From
back of case, your left,
B-2,
top position).
Cool Gain
If
cooling
is to be controlled, first
optimize
the heat
(CG)
Setting
adjustments. Start heat generating mechanism
(chemical reaction,
mechanical,
subambient set
point,
etc. that will require cooling action.
Set cool
gain
to 400 (maximum). If stable, enter.
Most likely the temperature will oscillate. Record
I
1.
2.
3.
Z:
values used.
Reduce gain to 200. Compare temperature
oscillations. If oscillations are reduced, continue
lowering gain until process is stable.
If up and down temperature peaks get bigger, cool
cycling (CC) may be too long or the cooling
mechanism has too much lag or time delay. If
possible, improve dynamics of cool transfer, If not,
go to rate (RT) and double rate time.
4. Now optimize cooling gain as in step 2.
5. Since heat rate will now be too long, cut heat gain
15
in half.
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Trouble
Shooting
Unit Repairs
Front dark - no instrument power, blown fuse or burned
out transformer.
Process display shows CCCC - Open thermocouple.
Short terminals 1 and 2, should indicate temperature at
back of case. Repair or replace thermocouple.
About Half Or Twice Expected Reading- Check
position of ºC or ºF switch. Short 1 and 2 to read room
temperature. 22-30 is %, 70-85 is ºF
About 30% Error - Wrong thermocouple type.
Disconnect couple. “J” units over range above 1400°F,
“K”
above
2000°F +
.
No Heat - Heater wiring, wrong output module, blown
fuses.
Heat Stays On- Welded relay contacts or shorted
output module. Check for cause and correct the
components.
Process Display Shows 0000 Or Initially Displays Room
Temperature Then Counts Down Scale As Process
Warms - Check for reversed thermocouple.
It is recommended that units requiring service be
returned
to
an authorized service center. When a
controller is returned for service, a note stating the
problem should accompany the unit. To eliminate
service delay, consult the factory prior to returning any
A spare parts list can be supplied upon request if
complete model number, serial number and
temperature range is supplied.
Warranty
This equipment is warranted to be free from defects of material
and workmanship. It is sold subject to our mutual agreement that the
liability of Athena Controls, Inc. is to replace and/or repair at its
factory, provided the equipment is returned, transportation prepaid
within (2) years of its purchase.
The purchaser agrees that Athena Controls, Inc. shall assume no
liability for consequential damages resulting from its use or
packaging of shipments returned to the factory.
Components which wear or which are damaged by misuses are not
warranted. These include contact points, fuses and triacs. Units
which have been rewired by customer are not warranteed.
Specifications are subject to change without notice.
Athena Controls Inc., 5145 Campus Drive
Plymouth Meeting, PA 19462
(215) 828-2490
unit.
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