© 2022
13
WTC3243 TEMPERATURE CONTROLLER
SET THE VSET SOURCE JUMPER
shows the jumper positions and
shows
the jumper location.
• To use the onboard trimpot to generate the setpoint
voltage (VSET), move the jumper to the trimpot or “T”
position.
•
To use an external voltage source through the remote
setpoint (RSET) input, move the jumper to the external
or “X” position.
• To use the high voltage setpoint (HSET) input, completely
remove the jumper. Using the HSET setting bypasses
the Data Acquisition Failsafe Protection circuit.
NOTE: When the VSET SOURCE jumper is in the “X”
position or removed, the voltage dialed in using the SET T
trimpot on the WTC3293 is ignored.
X
X
X
T
T
T
RSET is Source
HSET is Source
Trimpot is Source
(Factory Default)
Figure 7. VSET Source Jumper Settings
SET THE SENSOR BIAS SWITCH
Use
to configure the evaluation board for your
temperature sensor type. Sensor signal at SEN+ (TB4)
should not exceed (V
DD
- 2 V). The minimum recommended
signal is 250 mV in order to meet published specifications.
shows the switch location.
Figure 8. Sensor Bias Switch & VSET Jumper Location
Table 4.
Sensor Dipswitch Configuration
SENSOR TYPE
1 mA
100
µ
A
10
µ
A
0 to 2.5 kΩ Thermistor
(with Sensor Gain = 10)
OFF
ON
OFF
ON
1
2
3
2.5 kΩ to 25 kΩ
Thermistor
OFF
ON
OFF
ON
1
2
3
25 kΩ to 250 kΩ
Thermistor
OFF
OFF
ON
ON
1
2
3
100 Ω Platinum RTD
ON
OFF
OFF
ON
1
2
3
LM335
(with Sensor Gain = 10)
ON
OFF
OFF
ON
1
2
3
AD590
(See sensor-specific
wiring diagram)
OFF
OFF
OFF
ON
1
2
3
Black indicates switch head position.
SENSOR BIAS SWITCH
(100 µA shown)
VSET SOURCE JUMPER
(use onboard trimpot shown)
SENSOR GAIN JUMPER
(GAIN = 1 shown)