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CL-200A Manual, Rev. 120523 
 
 

 

 

11 

OPERATION  

The main use of a heater/cooler control device such as the 

CL-200A

 is to maintain a constant 

bath temperature with minimum deviation from a set temperature. This is usually achieved by using 
a thermally controlled chamber/platform or in-line solution heater, or a combination of both.  

NOTE:

 Refer to the front and rear panel schematics on pages 6-9 for orientation of the 

CL-200A

 controls.  

AUTOMATIC MODE  

In 

Automatic Mode

, the 

CL-200A

 maintains the temperature of the connected heater/cooler at 

the value set by the user.  

Operation is straightforward. Connect your heater/cooler device and sensor thermistor as 

described on page 10. Set the 

CL-200A

 to 

internal commands

 by setting the 

INTERNAL

/

EXTERNAL 

SELECT

 control (Item J) to 

internal

. Place the 

CL-200A

 into 

auto mode

 by switching the 

COOLING 

MODE SWITCH

 (Item C) to 

auto

. Switch the 

METER

 (Item B) to 

Set Temp

 and adjust to the desired set-

point using the 

SET TEMPERATURE 

control (Item H). 

Alternatively, the 

CL-200A

 can be commanded using external inputs. Set the 

CL-200A

 to 

external commands

 by setting the 

INTERNAL

/

EXTERNAL SELECT

 control (Item J) to 

external

. In this 

mode the 

CL-200A

 will accept external temperature settings from the 

EXT TEMP SET

 BNC (Item U) on 

the instrument rear panel. This input is calibrated to 100 mV/°C. 

The selectable 

LOOP SPEED 

control (Item G) is used to adjust the speed of the feedback loop in 

the heater/cooler-thermistor system, which controls the rate of change of the 

CL-200A

 output 

voltage. Non-Warner heater systems with feedback thermistors can be used in 

automatic mode

 

provided they are compatible with the 

CL-200A

 requirements. 

LOOP SPEED

 is normally set to 

fast

 to provide the shortest cycle time between the application of 

power to the heater element and the sensing of temperature at the thermistor. For heater/cooler-
thermistor systems with long response times, such as with Warner’s 

SC-20

 in-line solution 

heater/cooler, the 

fast

 setting will cause the temperature to overshoot the target resulting in system 

oscillation. For this condition, try 

medium 

or 

slow

 settings to find a more optimal feedback rate.  

Feedback Thermistor Selection  

FEEDBACK THERMISTOR

 switch allows the user to select which thermistor is used for the 

control loop. Choosing 

T1

 (control thermistor) sets the peripheral device’s internal thermistor to 

control the feedback loop. Selecting 

T2

 (monitor thermistor) allows feedback control at the location of 

the monitor thermistor, as selected by the user.  

The standard 

CONTROL THERMISTOR

 is the sensor located in the heating/cooling device. This 

sensor is placed at the optimal point to control the temperature of the heating/cooling device. The 

MONITOR THERMISTOR

 is the peripheral thermistor that can be used to monitor the temperature at 

another location in the experimental configuration. This thermistor monitors the temperature at the 
selected point in the experiment and is more accurate but is less stable in the control loop because of 
the delay between heating (or cooling) and sensing.  

To protect the experiment if the monitor thermistor is removed, the limit of the increase in 

temperature between the control and monitor thermistors in the feedback loop is 8

˚

C. This lowers 

 

                         

                      

Warner

 Instruments 

Harvard Apparatus Company     

Содержание CL-200A

Страница 1: ...e en nt ts s D Du ua al l C Ch ha an nn ne el l B Bi ip po ol la ar r T Te em mp pe er ra at tu ur re e C Co on nt tr ro ol ll le er r M Mo od de el l C CL L 2 20 00 0A A Warner Instruments 1125 Dixwell Avenue Hamden CT 06514 800 599 4203 203 776 0664 203 776 1278 fax ...

Страница 2: ... Voltage Control Item K 7 Peltier Limit LED Item L 8 Freeze Alert LED Item M 8 Heat Cool LED s Item N 8 Current Limit LED Item O 8 Feedback Thermistor Selector Switch Item R 8 Thermistor Open LED Item S 8 Rear panel 9 External Volts Set Item T 9 External Temp Set Item U 9 Heater Cooler input Item W 9 Power Entry Module Item Y 9 Ground Terminals Item X 9 SETUP 10 Warner Peltier Driven Systems 10 Op...

Страница 3: ...CL 200A Manual Rev 120523 APPENDIX 13 Specifications 13 Accessories and replacement parts 13 Warranty and service 14 Warranty 14 Service notes 14 Certifications 15 ...

Страница 4: ...ple to use with a single control for temperature adjustment Total automatic control is provided in automatic mode while manual control is available in manual mode A loop speed selector is used to optimize the response of the system to accommodate thermal delay characteristics intrinsic to the setup Features of the CL 200A include Quiet operation suitable for use in sensitive electrophysiology appl...

Страница 5: ... goal is to provide clarity rather than complexity we welcome any feedback you may wish to provide Warner Instrument product model numbers are presented using bold type References to controls are specified using SMALL CAPS References to control settings are specified using italic type Special comments and warnings are presented in highlighted text Any other formatting should be apparent from conte...

Страница 6: ...w Set Temp reports the adjustment from either the SET TEMPERATURE control Item H or the EXT TEMP SET BNC Item Q Displayed units are C Control Temp reports the actual temperature of the feedback thermistor situated within the heater cooler device being used Displayed data is informative only and is in units of C Monitor Temp reports the temperature of the sensor thermistor which connects via the MO...

Страница 7: ...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 s...

Страница 8: ...E LED is lit when the Peltier device within the SC 20 approaches 0 C Activation of this circuit is informative only and will not alter any instrument setting Heat Cool LED s Item N RED and BLUE LED S indicate heating or cooling power applied to the Peltier device Current Limit LED Item O This indicator light informs the user that the channel has reached the maximum current output of 5 Amperes This...

Страница 9: ...A Input functions only when the INTERNAL EXTERNAL SELECT CONTROL Item J is set to external and the COOLING MODE SWITCH Item C is set to auto Units are 100 mV C This input can be used for computer control purposes Heater Cooler Peripheral Device Output Item W This is the connection port for Warner Heater Cooler devices such as the SC 20 Dual In line Heater Cooler and QE 1HC Heating Cooling Platform...

Страница 10: ...Item U or EXT VOLT SET Item T BNC s on the rear panel Operating With Other Equipment The CL 200A can be used to power other Warner equipment such as the SH 27B and SF 28 inline solution heaters In addition the controller can be used as an independent device to power third party equipment so long as the following considerations are met Warner Resistive Heating Systems Use of the CL 200A to power Wa...

Страница 11: ...th feedback thermistors can be used in automatic mode provided they are compatible with the CL 200A requirements LOOP SPEED is normally set to fast to provide the shortest cycle time between the application of power to the heater element and the sensing of temperature at the thermistor For heater cooler thermistor systems with long response times such as with Warner s SC 20 in line solution heater...

Страница 12: ...nto manual mode by switching the COOLING MODE SWITCH Item C to manual Switch the METER Item B to Output Volts and adjust to the desired set point using the MANUAL VOLTAGE control Item K Alternatively the CL 200A can be commanded using external inputs Set the CL 200A to external commands by setting the INTERNAL EXTERNAL SELECT control Item J to external In this mode the CL 200A will accept external...

Страница 13: ... External Voltage Set BNC Heater Cooler Device 15 pin D connector Temperature Range Peltier 6 C to 65 C Resistive Ambient to 65 C Meter Display Resolution 3 digit LED display of C or V 0 1 C 0 01 Volt 0 01 Ampere Meter Readouts Set temperature C Control Temperature C Monitor Temperature C Output Voltage V Output Current A Enclosure 8 9 X 42 6 X 29 2 cm W x H x D Weight 10 lb 4 54 Kg Operating cond...

Страница 14: ...h a 5x20 mm 0 8 A slow blow fuse 0 4 A for facilities using 220 240 V line voltages If the replacement fuse also fails please call Warner Instruments for assistance B Occasionally a knob on the front panel will loosen after long use These are collet style knobs and are tightened with a screw located under the knob cap To gain access to the adjustment screw pry the cap off with a thin bladed screwd...

Страница 15: ...0000 4 8 EN610000 4 11 Manufacturer s Name Warner Instruments LLC Manufacturer s Address 1125 Dixwell Avenue Hamden CT 06514 Tel 203 776 0664 Equipment Description Power Controller Equipment Class ITE Class A Model Numbers CL 200A I the undersigned hereby declare that the equipment specified above conforms to the above Directive s and Standard s Place Hamden Connecticut USA Signature Full Name Bur...

Страница 16: ...ments LLC Manufacturer s Address 1125 Dixwell Avenue Hamden CT 06514 Tel 203 776 0664 Equipment Description Power Controller Safety requirements for electrical equipment for measurement and laboratory use Equipment Class Class I Model Numbers CL 200A I the undersigned hereby declare that the equipment specified above conforms to the above Directive s and Standard s Place Hamden Connecticut USA Sig...

Страница 17: ...CL 200A Manual Rev 120523 Warner Instruments A Harvard Apparatus Company 17 ...

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