tekmar 150 One Stage Setpoint Control - Manual

- Data Brochure
One Stage Setpoint Control 150 12/08
D 150
HEAT
F
Setpoint Differential Delay/Cycle
The tekmar One Stage Setpoint Control 150 is a microprocessor-based control that can be programmed
to maintain a fixed setpoint temperature by cycling a heating or cooling device using either bang-bang
or Pulse Width Modulated (PWM) output control.
This reliable and versatile control has a very wide setpoint range, an adjustable differential and time
delay that makes it useable in many different applications. The control has a digital LCD window that
normally shows the actual sensor temperature and can be used to view the setpoint as well as the other
programmed settings.
A Universal sensor 071 is supplied with the control. The wire to the sensor may be extended up to 500 ft.
(150m) by standard 18 AWG low voltage wire. The display will indicate a sensor fault whenever the
sensor is either open or short circuited.
Technical specifications
Settings
Temperature display
— -85 to 302°F (-65 to 150°C)
Setpoint — -40 to 239°F (-40 to 115°C)
Differential (Bang/Bang) — 1 to 40°F (1 to 22°C)
Differential range (PWM) — 3 to 40°F (2 to 22°C)
Time delay (Bang/Bang) — 0 to 19 min. 50 sec.
(10 second increments)
Cycle length (PWM) — 30 sec. to 19 min. 50 sec.
(10 second increments)
Operating mode — Heating/Cooling
Temperature scale — Fahrenheit/Celsius
Programmed settings — Ten year memory
backup
• When the One Stage Setpoint Control 150 is powered-up the digital display will show all of the display elements. The control
will then monitor the sensor temperature and display it in the digital display. (See diagram)
Technical Data
PRGM
HEAT COOL
F C
Hole for mounting screw
Wiring Chamber;
Terminals for
24Vac power
supply and
control circuit
for heating/
cooling device
Item
selection
and display
button
Wiring Chamber;
Terminals for
Sensor
°C or °F
indicators
Cooling mode
indicator
Programming
and display
buttons
Heating mode
indicator
Programming
mode indicator
Temperature,
Differential and
Delay/Cycle
Display
Bang - Bang Operating Mode
Bang-Bang control outputs turn equipment on when there is a demand for heating
or cooling, and then shut it completely off when the demand is satisfied.
• If the control is programmed for “Heat” in this mode, it turns on its relay and
the “HEAT” display element when the sensor temperature is (a) — 1/2 the
differential setting below the setpoint, and (b) — the delay has timed out.
When the sensor temperature rises 1/2 the differential setting above the
setpoint, the relay switches off , the “HEAT” display element turns off and the
delay starts to time out. During the time out period, the Delay/Cycle pointer
will flash if heating is needed.
Sequence of Operation
Desired temperature
this example
160°F(71°C)
T
emperature
W
armer
Cooler
Time
Differential
this example
10°F(5°C)
165°F(74°C)
155°F(68°C)
Te
m
pe
ra
tur
e
fall
CONTROL RELAY (HEATING)
OFF ON
Te
m
pe
ra
tu
re
ris
e
Item
Identifiers
Hole for mounting screw
PWM
Dip Switch Down
Dimensions — 2-7/8" x 4-3/4" x 7/8”
) m m 2 2 x 0 2 1 x 4 7 (
Gross Weight
— 1 lb (450g)
Ambient — -20 to 120°F (-30 to 50°C)
g n i s n e d n o c - n o n H R % 0 9 <
Power supply
— 24 V (ac) ±10%, 50/60 Hz, 1.3 VA
A 2 0 . 0 % 0 1 ± ) c d ( V 4 2
Relay
— 240 V (ac) 8 A 1/4 hp
Sensor — 10 kΩ @77°F (25° ± 0.2°C),
r o t s i m r e h t C T N , 3 e v r u c
.t f 0 0 5 o t p u h ti w e t a r u c c a
e ri w e g u a g 8 1 f o ) m 0 5 1 (
Control accuracy
— ±0.5°F (±0.3°C) at 70°F (21°C)
Item