CL-200A Manual, Rev. 120523
7
Output Amps
reports the current output command associated with either the
MANUAL
VOLTAGE
control (Item K) or the
EXT
VOLT SET
BNC (Item T). Displayed units are Amperes.
The
METER
also provides an indication that the main
POWER
is
on
.
Cooling Mode Switch (Item C)
Selects between
Automatic
or
Manual
operational modes, or center
select for
off
.
Thermistor Recorder Outputs (Items E, V)
BNC connectors are provided to send thermistor readings to a data acquisition system or
chart recorder.
M
ONITOR TEMP OUT
(Item E) reports the temperature of the sensor thermistor which connects
via the
MONITOR TEMP IN
BNC (Item F). Output is calibrated to 100 mV/
C.
C
ONTROL TEMP OUT
(Item V, back panel) reports the actual temperature of the feedback
thermistor situated within the heater/cooler device being used. Output is calibrated to 100
mV/
C.
Monitor Temp In BNC (Item F)
BNC for connecting a sensor thermistor used to sample the temperature at a point of
interest. This input is designed for use with the
TA-29
cable assembly.
Loop Speed Switch (Item G)
This switch sets the feedback loop speed for the
CONTROL TEMP THERMISTOR
when the
CL-
200A
is used in
automatic mode
. Feedback options include
fast, medium,
and
slow
. Optimally
set to
fast
for most applications but can be set to
medium
or
slow
for systems with longer
thermal delay characteristics. For example, use the
medium
speed for use with the
SC-20
Bipolar In-Line Solution Heater.
Set Temperature Control (Item H)
This dial adjusts the set point of the
automatic
temperature control system. The associated
GREEN
LED is
on
when the
INTERNAL
/
EXTERNAL SELECT CONTROL
(Item J) is set to
internal
, and
the
COOLING MODE SWITCH
(Item C) is set to
auto
. Set value can be read from the
METER
(Item B)
in the
set temp
position.
External/Internal Select Control (Item J)
This switch selects between
internal
or
external
control inputs when the instrument is in
Manual
mode (Item C).
When the
INTERNAL
/
EXTERNAL SELECT CONTROL
is set to
internal
, and the
COOLING MODE
SWITCH
(Item C) is set to
auto
, the
SET TEMPERATURE CONTROL
(Item H) will be active. Setting
the
COOLING MODE SWITCH
(Item C) to
manual
disables the
SET TEMPERATURE CONTROL
(Item H)
and activates the
MANUAL VOLTAGE CONTROL
(Item K).
Manual Voltage Control (Item K)
This dial is used to manually adjust the voltage output to the heater/cooler device. The
associated
GREEN
LED is
on
when the
INTERNAL
/
EXTERNAL SELECT CONTROL
(Item J) is set to
Warner
Instruments
A Harvard Apparatus Company
