SCIENTIFIC INSTRUMENTS 9700 Operation Manual

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Rev

RFEA #

Initial Release

Modified Specifications

Added T/C Support

Added variable external

T/C reference

0728

Modified for electronic

distribution

0729

Corrected for new GUI

version

0734

Revised

other changes

0768

New T/C board

0850

Documentation

spec. refinements

0878

Additional Safety Notes

OPERATION MANUAL

9700 TEMPERATURE CONTROLLER

Record of Revisions

Description

rear

panel,

and

SCIENTIFIC INSTRUMENTS, INC.

090-256

for

Rev by

Date

5/9/02

5/29/02

7/31/02

8/30/02

12/18/02

01/20/03

03/28/03

06/18/03

05/06/04

09/23/04

Appr by

Date

5/9/02

5/29/02

7/31/02

9/3/02

12/18/02

01/20/03

03/28/03

06/18/03

05/20/04

09/23/04

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Page 1 OPERATION MANUAL 9700 TEMPERATURE CONTROLLER Record of Revisions RFEA # Description Rev by Date Appr by Date Initial Release Modified Specifications 5/9/02 5/9/02 Modified Specifications 5/29/02 5/29/02 Added T/C Support 7/31/02 7/31/02 Added variable external 8/30/02 9/3/02 T/C reference 0728...
Page 2: Table Of Contents
ABLE OF ONTENTS Quick Start - Model 9700 Temperature Controller -............1 Quick Start - Model 9700 Temperature Controller Graphical User Interface -....5 Quick Start - Model 9700 Thermocouple Option - ............9 1 IMPORTANT SAFETY INFORMATION..............1-1 Heater Considerations................... 1-1 Auxiliary Outputs (Heater Voltage and Analog) ..........
Page 3 Control Modes ....................5-2 5.3.1 Stop ....................... 5-2 5.3.2 Manual (Normal)..................5-2 5.3.3 Program....................5-2 5.3.4 Fixed...................... 5-3 5.3.5 AutoTune....................5-3 5.3.5.1 General Description ..............5-3 5.3.5.2 Procedure ..................5-3 Menu System ....................5-4 5.4.1 Set Points ....................5-4 5.4.1.1 Main Set Point................
Page 4 5.4.5 Sensor Curves..................5-12 5.4.5.1 View Active Curve ..............5-13 5.4.5.2 Edit User Curve................5-13 5.4.5.3 Select Curve ................5-14 5.4.5.4 Correct Curve................5-15 5.4.6 Communication ................... 5-16 5.4.6.1 Baud Rate .................. 5-16 5.4.6.2 GPIB (or IEEE-488) Address ............. 5-16 5.4.7 Instrument Setup .................
Page 5 5.7.3 Resetting Programs................5-25 6 GRAPHICAL USER INTERFACE (GUI) ..............6-1 Sensor Configuration..................6-1 6.1.1 Loading a Sensor Curve................ 6-1 6.1.2 Activating a Sensor Curve ..............6-1 6.1.3 Reading a Sensor Curve ............... 6-2 6.1.4 Sensor Data Format ................6-2 Program Editor ....................
Page 6 10 HARDWARE ......................10-1 10.1 Replacing the Heater Fuse................10-1 10.2 Using an External Power Booster..............10-1 11 APPENDIX A: SENSOR PERFORMANCE SPECIFICATION ......11-1 090-256...
Page 7 • Advanced AutoTune Capability • RS232 and IEEE-488 Standard • Universal AC input, 90 – 250 VAC Hardware Installation Before using the Model 9700 Temperature Controller, several connections must be made to the rear panel. 9700 Temperature Controller Quick Start...
Page 8 • Wire the supplied banana plug to a heater or equivalent resistive load and connect to the instrument. • If the Model 9700 is to be used with a computer, connect a communications cable (RS232 cable or IEEE-488 cable). Communication cables are not supplied with the unit.
Page 9 Warning!!! The Model 9700 is capable of supplying 50 watts. If this will exceed the power rating of your heater, you should limit the power using the “Maximum Heater Power” parameter (accessed by pressing “menu, 2, 6”). Proper heat sinking must be provided for the heater.
Page 10 MENU STRUCTURE FOR MODEL 9700 TEMPERATURE CONTROLLER Set Points 1) Main Setpoint – Set point for the main control loop 2) Aux Setpoint – Set point for the auxiliary control loop 3) Fixed Htr (Main) – Fixed percentage applied to heater if Fixed Control Mode is selected 4) Fixed Htr (Aux) –...
Page 11 Congratulations! You have purchased an innovative product from Scientific Instruments employing the latest technology. The Model 9700 Temperature Controller is designed to combine high performance with simplicity of use. This LabVIEW™ based Graphical User Interface (GUI) is a valuable extension to the instrument, providing a simple way to collect data, change instrument parameters, and transfer sensor curves.
Page 12 Windows® operating systems. Operation Before using the Model 9700, first follow the procedure in the instrument’s Quick Start, which provides instructions for making rear panel connections and applying power. Connect the 9700 to your computer using either an RS232 or GPIB cable (not included).
Page 13 The Sensor Configuration option makes it possible to view the curves stored in the instrument or download new curves. The Zone PID Settings option makes it possible to 9700 Graphical User Interface Quick Start...
Page 14 Thank You! This completes our brief overview of the LabVIEW™-based Graphical User Interface. We hope you enjoy using the GUI and find it a valuable extension to the Scientific Instruments Model 9700 Temperature Controller. GRAPHICAL USER INTERFACE MAIN SCREEN...
Page 15 HERMOCOUPLE PTION Congratulations! You have purchased an innovative option for the Model 9700 Temperature Controller from Scientific Instruments. This Quick Start provides the information unique to the thermocouple option, namely the connection of the thermocouple temperature sensor. Reference should also be made to the other “Quick Starts”...
Page 16 Gold Calibration The thermocouple option is a factory-installed option. The Model 9700 is calibrated at the factory to read millivolts. If external compensation is used, no further instrument calibration is necessary. If internal compensation is used, after the proper jumper selections have been made, a final calibration of the compensation circuit must be performed.
Page 17: Important Safety Information
MODEL 9700 SCIENTIFIC INSTRUMENTS INC. IMPORTANT SAFETY INFORMATION Heater Considerations Proper heater selection, system design, and installation are critical to assure maximum performance and safety. The following are important considerations: • The heater circuit may produce up to 50 watts of power. The heater must be capable of dissipating this power properly.
Page 18: Grounding Lug
MODEL 9700 SCIENTIFIC INSTRUMENTS INC. Grounding Lug The grounding post mounted on the rear panel does not have a standard grounding function and is not required to be used. However, it may be used to provide additional grounding of the unit if desired.
Page 19: Description
MODEL 9700 SCIENTIFIC INSTRUMENTS INC. DESCRIPTION The 9700 Temperature Controller is a state-of-the-art temperature controller designed to meet the present day requirements for cryogenic temperature control. It may be operated as a stand-alone instrument or in conjunction with a computer. A Graphical User Interface (GUI) for a personal computer is provided as a standard feature.
Page 20: Controller Specifications
MODEL 9700 SCIENTIFIC INSTRUMENTS INC. Controller Specifications 2.3.1 User Interface • Display..........2 lines by 20 characters Vacuum Florescent Display (9 mm character height) Twenty-key control, numeric keypad, four-arrow rocker pad, two control keys, and two data entry keys • LED Indication ........ Power, Alarm, Remote, Menu, and Control •...
Page 21: Optional Signal Conditioning Cards
MODEL 9700 SCIENTIFIC INSTRUMENTS INC. 2.3.3 Optional Signal Conditioning Cards • RTD A/C Measurement ....Sample rate 3 Hz • Thermocouple Sensors ....Type E, J, K, R, S, T and Chromel Gold 2.3.4 Main Heater Output • Power ..........50 Watt, Current Controlled •...
Page 22: Relay Outputs
MODEL 9700 SCIENTIFIC INSTRUMENTS INC. 2.3.7 Relay Outputs • Two relays with Form-C contacts ... 5 amp 30 VAC rating • Programmable to any temperature set point with hysteresis 2.3.8 General • Size ..........8.5” x 3.5” x 12” (1/2 DIN) •...
Page 23: Sensor Selection
GUI has been loaded on a computer, the curves on the CD may be found in the Scientific Instruments directory. Calibrated sensor data curves are shipped on 3.5” diskettes. If the sensors are ordered at the time of shipment, the curves are loaded onto the instrument at the factory.
Page 24: Installation
MODEL 9700 SCIENTIFIC INSTRUMENTS INC. INSTALLATION Hardware installation consists of making the proper connections between external devices and the rear panel shown above. The minimum connections are as follows: Power is provided by connecting an approved power cord to the universal ♦...
Page 25: Operation
The user interface for the 9700 consists of a main display with several variations, a menu system for instrument parameters, a control entry menu for starting control, and a number of diagnostic displays.
Page 26: Control Modes
7, 4. Control Modes The 9700 provides several different types of control in order to meet the needs of your control environment. The basic type of control is normal PID control (NPID). A variation of this is zone PID control (ZPID), which provides for different PID parameters to be used in different temperature ranges.
Page 27: Fixed
(menu, 1, 3). When the 9700 is in the fixed control mode, the set point on the main display is a percentage of full heater power and is preceded by the designation “FA” or “FB”...
Page 28: Menu System
MODEL 9700 SCIENTIFIC INSTRUMENTS INC. turns off control, a special provision has been made for starting AutoTune. When the instrument is in the normal control mode, pressing ‘4’ also brings up the control entry menu. Press ‘4’ again to start AutoTune.
Page 29: Main Set Point
5.4.1.2 Aux Set Point The 9700 has an analog output which may be used for a number of different uses. It can be set to indicate temperature of either channel, it can be set to show the deviation from the set point on the main channel, it can be set to a fixed output, or it can be set as a second PID output.
Page 30: Control Settings
“Aux PID.” 5.4.2.3 PID (Zones) The 9700 is can be programmed to use different PID values for different temperature ranges in order to accommodate the different control characteristics of the system. This feature can be turned on by selecting zone PID control as described in the next option.
Page 31: Control Type
Press enter to save the change, or press escape to revert to the original value. 5.4.3 Programs Normal control at a single set point is suitable for many applications, but in some cases, it may be desirable to vary the set point over a period of time. The 9700 090-256...
Page 32: Edit Current Program
MODEL 9700 SCIENTIFIC INSTRUMENTS INC. allows the user to set up customized programs that will generate a temperature profile over time. Access is provided to the programs in option 3 of the main menu. Up to 5 programs may be stored in memory, and any 1 of them may be recalled to the current program position.
Page 33: Edit Stored Program
MODEL 9700 SCIENTIFIC INSTRUMENTS INC. a point is less than the time value for the preceding point. A program will also end if the maximum number of points (50) is reached. In this case, it is probably best just to set the number of points to 50 so that all possible points will be displayed.
Page 34: Activate Program
MODEL 9700 SCIENTIFIC INSTRUMENTS INC. The next display shows the number of program points. Editing is identical to that for the current program, as described in the previous section. Please refer to that section for instructions if needed. 5.4.3.3 Activate Program The “Activate Program”...
Page 35: Disable
MODEL 9700 SCIENTIFIC INSTRUMENTS INC. 5.4.4.1.1 Disable Of course the analog output may be disabled. In this case, no voltage is output to the analog output connector. 5.4.4.1.2 Temperature If the “Temperature” option is chosen, the voltage output on the analog output connector varies with the temperature of either channel A or B.
Page 36: Relay Settings
5.4.4.2 Relay Settings The 9700 has two relays. Each relay may be assigned to either channel and may serve as a high or low alarm (or set point), if desired. To access the relay settings, choose option 2 of the “Aux Output” menu. The display shows the relay to be set.
Page 37: View Active Curve
MODEL 9700 SCIENTIFIC INSTRUMENTS INC. PC and can run the GUI and communicate with the instrument, that is much preferable, since entering all the sensor curve values via the front panel keypad can be quite tedious and error prone. If a curve is downloaded to the instrument with the GUI, it must be activated on either channel A or channel B in order to take effect, as explained below.
Page 38: Select Curve
MODEL 9700 SCIENTIFIC INSTRUMENTS INC. The next display is the sensor serial number. This can be edited in the same manner as the sensor model. Press enter to continue. The sensor current is the next parameter. To change the current, press the rocker switch up or down.
Page 39: Correct Curve
MODEL 9700 SCIENTIFIC INSTRUMENTS INC. minute. It will not be possible to perform any other function on the controller while the program is being recalled. RS232 and GPIB communications will be interrupted. It is best to exit the GUI (if it is running) before performing this function and to restart it afterwards.
Page 40: Communication
5.4.6 Communication The 9700 has two communication interfaces standard with each instrument, GPIB (or IEEE-488) and RS232. In order to establish communication with the instrument, the baud rate must be set properly for RS232, and the address must be set for GPIB.
Page 41: Data Entry Mode
MODEL 9700 SCIENTIFIC INSTRUMENTS INC. The first display allows the choice of whether to modify the data collection settings for channel A or channel B. For channel A, just press enter. For channel B, press the rocker switch up or down and press enter.
Page 42: Display Setup
5.4.8 Diagnostics A number of diagnostic functions are available to check functionality of the 9700. This makes it possible to check instrument hardware independent from any logic conditions that may turn relays or the heater on and off, etc.
Page 43: Keypad Test
MODEL 9700 SCIENTIFIC INSTRUMENTS INC. option is chosen, there is a hardware problem. Press escape or enter to exit this display. The heater power bar graph is tested separately, as explained in one of the following options. 5.4.8.3 Keypad Test Option 3 of the “Diagnostics”...
Page 44: Relay Test
This concludes the discussion of the menu displays. Thermocouple Setup and Calibration When the 9700 is supplied with the thermocouple option, menu options in the thermocouple setup mode must be set via the front panel to match the physical jumper settings chosen in the thermocouple connector and compensation module.
Page 45: Thermocouple Hardware Configuration
If another reference liquid is used, enter the correct temperature for that liquid. The 9700 is calibrated at the factory to read millivolts. When a thermocouple is used with an external reference junction in an ice bath, no further thermocouple calibration is required.
Page 46: Using Internal Room Temperature Compensation
Method:” prompt is displayed, press the rocker switch up or down until “Internal” is displayed, and press enter to store the choice. The 9700 is calibrated at the factory to read millivolts, but additional offsets occur in the room temperature compensation circuitry. This makes necessary an additional calibration step, as described in the following section.
Page 47: Additional Diagnostic Features And High/Low Temperature
MODEL 9700 SCIENTIFIC INSTRUMENTS INC. thermocouple inputs and entering the room temperature as the calibration temperature.) Enter the thermocouple setup and calibration mode as described above, then choose the “Cal (Internal Mode)” function. The display should indicate the channel letter and the prompt “Cal Temperature Point = xxx.xxx K”. The default value is 273.15 K (the ice point).
Page 48: Heater & Analog Output Values
MODEL 9700 SCIENTIFIC INSTRUMENTS INC. used to fine tune the constant current sources. The rocker switch may be pressed right and left to cycle through the various current adjustment values. The current adjustment values are set in the calibration routine when the current sources are adjusted;...
Page 49: Resetting Sensor Curves
MODEL 9700 SCIENTIFIC INSTRUMENTS INC. To exit without resetting parameters, press escape. To execute this function and reset all variables, press enter three times. (Observe the cautions along the way.) 5.7.2 Resetting Sensor Curves This function is used to reset all sensor curves to the factory defaults. This function does not affect calibration or program settings.
Page 50: Graphical User Interface (Gui)
To load the data into the 9700, click on the “Download” button. The user will be asked to select a user curve between 1 and 5 where the curve will be stored.
Page 51: Reading A Sensor Curve
MODEL 9700 SCIENTIFIC INSTRUMENTS INC. 6.1.3 Reading a Sensor Curve It is possible to reverse the above process by reading a sensor curve from the instrument, examining it, and saving it to disk. To do this, use the “Upload” button to retrieve the sensor curve from either one of the active channels or from one of the five user curves.
Page 52: Program Editor
MODEL 9700 SCIENTIFIC INSTRUMENTS INC. • The “Gain” is a decimal number. • The next line after the word “Temperature” (followed by a tab) must be the data points. • The Temperature versus Voltage (or Resistance) data should be separated by a single tab tab.
Page 53: Loading A Program
MODEL 9700 SCIENTIFIC INSTRUMENTS INC. 6.2.2 Loading a Program To open the program editor (also called “Thermal Cycle Editor”), click on Tools, Program Editor. To load a program into the controller, click on the “Download” button. The user will be asked to select one of five storage locations. Upon making this selection, the program will be loaded into the controller.
Page 54 MODEL 9700 SCIENTIFIC INSTRUMENTS INC. desired from 20 Kelvin to 100 Kelvin, then the values loaded into zone 1 would be 100.000, 15, 50, 6. A total of 10 zones numbered from 0 to 9 are possible. 090-256...
Page 55: Obtaining Proper Temperature Control
MODEL 9700 SCIENTIFIC INSTRUMENTS INC. OBTAINING PROPER TEMPERATURE CONTROL Industry standard PID (Proportional, Integral, Derivative) control is used to reach and maintain the desired temperature. There are many variations of PID algorithms, each with its own strengths and weaknesses, but there is no one form that is universally acknowledged as better than all the others.
Page 56: Autotune
MODEL 9700 SCIENTIFIC INSTRUMENTS INC. AutoTune To use the AutoTune feature, the system must first be stabilized at the temperature for which the PID values are to be determined. This is normally not difficult. However, any one of the three terms (P, I, or D) can cause the system to be unstable.
Page 57: Using Zone Pid Control
To use Zone PID control, the environment must first be evaluated to determine how many zones are necessary. The 9700 allows up to 10 zones to be specified, but less than that number may be satisfactory in many cases. The AutoTune feature may be used at several temperatures to determine the PID values needed.
Page 58: Remote Computer Interface
(C, Basic, etc.). The header file for these commands is located on the CD distributed with the 9700, and is listed below for reference. These functions are actually coded in LabVIEW™, thus the 9700 GUI must be loaded on the PC to be able use these functions.
Page 59 MODEL 9700 SCIENTIFIC INSTRUMENTS INC. int32 __stdcall M9700QueryAnalogDeviationRange(float32 *flGain); int32 __stdcall M9700QueryAnalogOutputMode(uInt16 *uiAnalogMode, uInt16 *uiChannel_OUT); int32 __stdcall M9700QueryAnalogOutput(float32 *flAnalog_Out); int32 __stdcall M9700QueryAnalogTemperatureLimits(float32 *flLowTemp, float32 *flHighTemp); int32 __stdcall M9700QueryAuxSetpoint(float32 *flAuxSet); int32 __stdcall M9700QueryCalibration(int32 *uiCurrent); int32 __stdcall M9700QueryChannelEnable(uInt16 *uiChannel, uInt16 *uiEnable); int32 __stdcall M9700QueryChannelFilter(uInt16 *uiChannel, uInt16 *uiFilter);...
Page 60: Labview™ Drivers
LabVIEW™ VI’s are included on the distribution CD and may be used in the users LabVIEW™ program. They correspond directly to the functions listed above. Low Level Communications All communication with the 9700 is accomplished via ASCII strings with a terminating character. This command set is defined in this section. 8.3.1...
Page 61: Detailed Command Syntax
8.3.2 DETAILED COMMAND SYNTAX The following section defines the exact command syntax as used in the 9700. As much as possible, the IEEE-488.2 command syntax has been followed. All commands are ASCII strings terminated by a <CR> for RS-232, and a <LF> for GPIB.
Page 62: Detailed Command Summary
MODEL 9700 SCIENTIFIC INSTRUMENTS INC. 8.3.3 Detailed Command Summary RESPONSE FORMAT PARAMETER RANGE ITEM HEADER PARAMETERS Temp, Ch A aaa.aaa Temperature, Query Only Temp, Ch B aaa.aaa Temperature, Query Only Temp, All TALL aaa.aaa,bbb.bbb Temperature (query) a = TA, b = TB Set Point aaa.aaa...
Page 63 MODEL 9700 SCIENTIFIC INSTRUMENTS INC. RESPONSE FORMAT PARAMETER RANGE ITEM HEADER PARAMETERS Analog Temp ANAT aaa.aaa,bbb.bbb Analog Temperature Settings (Scaling Temperature Mode is selected on Analog Output) a High Setting b Low Setting Analog Dev ANAD aaa.aaa Analog Deviation Range...
Page 64 MODEL 9700 SCIENTIFIC INSTRUMENTS INC. RESPONSE FORMAT PARAMETER RANGE ITEM HEADER PARAMETERS Sensor CDAT aa,bb,ccc.ccc,ddd.ddddd a Curve Number (-1 = A, -2 = B, read only; 1 to Calibration Data 5, stored curves, read/write) SEE NOTE 1 b Data Pt, 1 to 100...
Page 65: Calibration
Preparation Turn on the 9700 and let it stabilize for at least 1 hour. The voltmeter and source calibrator (optional) should also be turned on and allowed to warm up. It is very important to have a voltmeter with an input impedance of 1 GΩ or higher, otherwise the results obtained will be very inaccurate.
Page 66: Diode And Rtd Models
MODEL 9700 SCIENTIFIC INSTRUMENTS INC. 9.3.1 Diode and RTD Models These instructions are for diode and RTD units with an input range of 0 to 5 volts and a current source of 10 µA. If the input range is 0 to 7.5 volts, then substitute 7.5 V wherever 5 V appears.
Page 67: Thermocouple Models
MODEL 9700 SCIENTIFIC INSTRUMENTS INC. 8. Pressing the rocker switch up (or down repeatedly) shows the other options—the zero and span of the A/D converter. Choose one of these options or press escape at this point to exit the calibration function.
Page 68 MODEL 9700 SCIENTIFIC INSTRUMENTS INC. 3. Press enter 3 times, noting the cautions on each display. 4. At the prompt “Channel to Calibrate,” choose the channel by pressing the rocker switch up or down and pressing enter. 5. The next prompt “Choose Calibration” provides a choice between several calibration options.
Page 69 MODEL 9700 SCIENTIFIC INSTRUMENTS INC. HARDWARE Normally, it should not be necessary for the user to gain access to the inside of the instrument. There are two exceptions to this, which are described in the sections below. If it becomes necessary to open the cover for these reasons, the user should be careful to follow good safety practices as follows: •...
Page 70 MODEL 9700 SCIENTIFIC INSTRUMENTS INC. NOTE: A short should only be placed on the heater output if it has been disabled! Provision has been made to disable the normal heater output. A jumper on the main PC board labeled JMP5 is normally connected from pin 1 to pin 2. Moving this jumper to connect pins 2 and 3 will disable the heater circuit.
Page 71 MODEL 9700 SCIENTIFIC INSTRUMENTS INC. APPENDIX A: SENSOR PERFORMANCE SPECIFICATION PRELIMINARY PERFORMANCE SPECIFICATIONS (7/25/02) Sensor Type Silicon Diode Gallium Arsenide Ruthenium Oxide Platinum Thermocouple Diode Model Number SI 410 GA 300 RO 105 P1 (100 ohms) Chromel Gold Temperature Range 1.5 to 450 K 1.5 to 450 K...