Owner's manual

Two Sensor Operating Mode
When two sensors are used, sensor (S1) controls output relay 1 and sensor (S2)
controls output relay 2.
• If the control setpoint 1 and/or 2 is programmed for “Heat”
the control turns on the relay
and shows 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 and the delay starts to time out.
- Data Brochure
Two Stage Setpoint Control 152
12/08
D 152
HEAT
F
Setpoint
Differential
Delay
1
The tekmar Two Stage Setpoint Control 152 is a microprocessor-based control that can be programmed with two
independent setpoint temperatures to cycle heating or cooling devices on and off.
This reliable and versatile control has adjustable differentials, time delays, and a very wide setpoint range 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 setpoints and other programmed settings.
A Universal Sensor 071 sensor 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 control can operate as a two stage setpoint control with a single
sensor connected or as two independent one stage setpoint controls with two sensors connected. The display
will indicate a sensor fault whenever a sensor is either open or short circuited.
Technical Data
Settings
Temperature Display — -85 to 302°F (-65 to 150°C)
Setpoint 1 — -40 to 239°F (-40 to 115°C)
Differential 1 — 1 to 40°F (1 to 22°C)
Time delay 1 — 0 to 19 min 50 sec
Operating mode 1 — Heating/Cooling
Setpoint 2 — -40 to 239°F (-40 to 115°C)
Differential 2 — 1 to 40°F (1 to 22°C)
Time delay 2 — 0 to 19 min 50 sec
Operating mode 2 — Heating/Cooling
Temperature scale — Fahrenheit/Celsius
Programmed settings — Ten year memory backup
• When the Two Stage Setpoint Control 152 is powered-up
the digital display will show all of the display elements. The control
will then monitor either sensor (S1) or sensor (S2) temperature and display the temperature on the digital display. Pressing
and releasing the Item button will toggle between the sensor (S1) and sensor (S2) temperature readings when two sensors
are used. (See diagram)
Sequence of Operation
Desired temperature
this example
160°F(71°C)
Temperature
WarmerCooler
Time
Differential
this example
10°F(5°C)
165°F(74°C)
155°F(68°C)
T
e
m
p
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r
a
t
u
r
e
f
a
l
l
CONTROL RELAY (HEATING)
OFF ON
T
e
m
p
e
r
a
t
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r
i
s
e
Technical specifications
Dimensions
— 2-7/8" x 4-3/4" x 7/8"
(74 x 120 x 22 mm)
Gross Weight — 1 lb (450g)
Ambient — -20 to 120 °F ( -30 to 50 °C)
< 90% RH non-condensing
Power supply — 24 V (ac) ± 10% 50/60 Hz 3 VA
24 V (dc) ± 10% 0.03 A
Relay capacity — 240 V (ac) 10 A 1/3 hp
Sensor —10 kΩ @ 77°F (25°± 0.2°C),
curve 3, NTC thermistor
accurate with up to 500 ft.
(150m) of 18 gauge wire
Control accuracy — ± 0.5° F ( ± 0.3°C) at
70°F (21°C)
2 Sensors
Dip Switch Up
3 4
5 6 789
Signal wiring
must be rated
at least 300 V.
Two Stage Setpoint
Control 152
Setpoint Differential Delay
Item
2 Sensors
On
–––
Off
Power
Relay 1 Relay 2
Com
Sen
S1
Sen
S2
Sen
C– R+
1 2
Meets Class B:
Canadian ICES
FCC Part 15
Made in Canada
tektra 906-03
Date Code
H1095F
No power
No power
Power: 24 V (ac) ± 10% 50/60 Hz 3 VA
24 V (dc) ± 10% 0.03A
Relay: 240 V (ac) 10 A 1/3 hp
Wiring Chamber;
Terminals for
Sensor(s)
°C o r °F
indicators
Cooling mode
indicator
Programming and
display buttons
Temperature,
Time delay and
Differential
Display
Wiring Chamber;
Terminals for 24Vac
power supply and
control circuit
for heating/
cooling device(s)
Hole for mounting screw
Hole for mounting screw
Programming
mode indicator
Heating mode
indicator
Item
identifiers
Item selection and
display button