Tekmar 150 Data Brochure

- Data Brochure
One Stage Setpoint Control 150
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.
F
This reliable and versatile control has a very wide setpoint range, an adjustable differential and time
HEAT
Setpoint Differential delay that makes it useable in many different applications. The control has a digital LCD window that
Delay/Cycle
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 Data

Technical specifications

Dimensions
Gross Weight
Ambient
Power supply
Relay capacity
Sensor
Control accuracy
Settings
Temperature display
Setpoint
Differential (Bang/Bang)
Differential range (PWM)
Time delay (Bang/Bang)
Cycle length (PWM)
Operating Mode
Temperature scale
Programmed settings

Sequence of Operation

• 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)
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.
— 2-7/8" x 4-3/4" x 7/8"
(74 x 120 x 22 mm)
— 1 lb (450g)
— -20 to 120° F ( -30 to 50° C)
< 90% RH non-condensing
— 20 to 28Vac, 60 Hz, 3VA,
class II transformer
— SPDT, 24Vac, 8 amp resistive
— 10 kΩ @ 77°F (25° ± 0.2°C),
curve 3, NTC thermistor
accurate with up to 500 ft.
(150m) of 18 gauge wire
— ± 0.5° F ( ± 0.3°C) at 70°F
(21°C)
— -85 to 302°F (-65 to 150°C)
— -40 to 239°F (-40 to 115°C)
— 1 to 40°F (1 to 22°C)
— 3 to 40°F (2 to 22°C)
— 0 to 19 min. 50 sec.
(10 second increments)
— 30 sec. to 19 min. 50 sec.
(10 second increments)
— Heating/Cooling
— Fahrenheit/Celsius
— Ten year memory
backup
PWM
Dip Switch Down
Hole for mounting screw
Programming
mode indicator
Date
S/N
Heating mode
PRGM
indicator
Setpoint
Item
Identifiers
Item
Item
selection
PWM
and display
24V only
button
1 2 3
On
Power
Off
C R R'
Wiring Chamber;
Terminals for
24Vac power
supply and
control circuit
for heating/
cooling device
Hole for mounting screw
One Stage Setpoint
Control 150
F C
HEAT COOL
Delay/Cycle
Differential
Power supply: 24V 60Hz 3VA
Relay capacity: 24V 8A
No
Power
6 7
4 5
N/O Sensor
N/C
CONTROL RELAY (HEATING)
OFF ON
Desired temperature
this example
160°F(71°C)
D 150
07/93
Temperature,
Differential and
Delay/Cycle
Display
°C or °F
indicators
Cooling mode
indicator
Programming
and display
buttons
Wiring Chamber;
Terminals for
Sensor
Differential
this example
10°F(5°C)
165°F(74°C)
155°F(68°C)
Time