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13
WTC3243 TEMPERATURE CONTROLLER
SET THE VSET SOURCE JUMPER
Figure 7
shows the jumper positions and
Figure 8
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
Table 4
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.
Figure 8
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)
