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Fluke 9118A User Manual

Fluke 9118A User Manual

Calibration furnace
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9118A
Calibration Furnace
Users Manual
September 2012 Rev. 1, 2/2014
© 2012-2014 Fluke Corporation. All rights reserved. Specifications are subject to change without notice.
All product names are trademarks of their respective companies.

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Summary of Contents for Fluke 9118A

  • Page 1 9118A Calibration Furnace Users Manual September 2012 Rev. 1, 2/2014 © 2012-2014 Fluke Corporation. All rights reserved. Specifications are subject to change without notice. All product names are trademarks of their respective companies.
  • Page 2 LIMITED WARRANTY AND LIMITATION OF LIABILITY This Fluke product will be free from defects in material and workmanship for one year from the date of purchase. This warranty does not cover fuses, disposable batteries, or damage from accident, neglect, misuse, alteration, contamination, or abnormal conditions of operation or handling.

  • Page 3: Table Of Contents

    Table of Contents Title Page Introduction ........................1 How to Contact Fluke ....................1 Safety Information ......................1 Installation ........................6 Unpack and Inspection ..................... 6 Placement ......................... 6 Dry-Out Period ......................6 How to Move the Product ..................7 Product Components .....................
  • Page 4 9118A Users Manual Operation ........................24 How to Set Parameters in the Product ..............25 Value List ......................25 Set Number Value ....................25 Softkey Menus ......................26 Temperature (TEMP) Setup Menu ................29 Scan Rate ......................29 Cutout ........................29 Program (PROG) Menu ....................
  • Page 5 Environment Conditions ..................61 Calibration Equipment ..................61 Calibration ......................61 Calibration Procedure for Tube Furnace ................ 64 Calibration procedure for 9118A-ITB (with Isothermal Block) ........70 Calibration Equipment Setup ..................70 Stability Test ......................73 Accuracy Test ...................... 73 Accuracy Adjustment ...................
  • Page 6 9118A Users Manual...
  • Page 7 List of Tables Table Title Page Symbols ..........................5 Front-Panel Controls ......................11 Rear-Panel Connections ....................... 13 Display Elements ........................23 Commands by Function or Group ..................38 Calibration Equipment......................61 Furnace Calibration Tests and Adjustments ................. 63 Stability Test Data ......................... 66 Axial Uniformity Test ......................
  • Page 8 9118A Users Manual...
  • Page 9 Rear View with Isothermal Block ..................9 Front-Panel Controls ......................10 Rear-Panel Connections ....................... 12 Rear View of 9118A Thermocouple Calibration Furnace with Isothermal Block ....14 Short Tube and Long Tube Insertion ..................15 Rear Plug Insertion ....................... 15 Attach the Rear Shield ......................
  • Page 10 9118A Users Manual Preset Selection ........................32 Change Preset Temperature ....................33 RS-232 Cable Connections....................36 Tube Furnace Calibration Flow Chart ................... 62 Test Equipment Connections ....................65 Calibration Equipment Setup ....................71 Calibration Procedure for Furnace with Thermo Block ............72...

  • Page 11: Introduction

    1200 °C. procedures that can cause damage to the Product or the How to Contact Fluke equipment under test. To contact Fluke Calibration, call one of these telephone  Warning numbers: To prevent possible electrical shock, fire, or •...
  • Page 12 9118A Users Manual • • Use the Product only as specified, or the Do not use the Product if it operates protection supplied by the Product can be incorrectly. compromised. • Do not use the Product if it is damaged.
  • Page 13 Calibration Furnace Safety Information •  Caution Applicable personal protective equipment must be worn when you move hot temperature To prevent damage to the Product: probes or do work near the furnace apertures. • Operate the Product at room temperature. •...
  • Page 14 9118A Users Manual • • Be careful with thermometer probes. Do Remove the isothermal block and rear plug not drop, stress, or let them become too prior to transporting the furnace. The hot. ceramic furnace tube is fragile and can be damaged by the block.
  • Page 15 WEEE Directive Annex I, this product is classed as category 9 "Monitoring and Control Instrumentation" product. Do not dispose of this product as unsorted municipal waste. Go to Fluke’s website for recycling information.

  • Page 16: Installation

    Type-S Thermocouple, Long of 45 cm of free air space around it. • Type-S Thermocouple, Short Fluke Calibration recommends that you do a test for axial • Protection Tube, Long uniformity and adjust if necessary after the Product is installed. Temperature uniformity of the Product could be •...

  • Page 17: How To Move The Product

    Calibration Furnace Product Components How to Move the Product Product Components As shown in Figure 1 the two primary components of the  Warning Product are the furnace and the controller. Figures 2 and 3 To prevent personal injury, use proper show the thermocouple calibration furnace with the techniques to lift the Product.
  • Page 18 9118A Users Manual Furnace Controller gxs009.eps Figure 1. Calibration Tube Furnace...
  • Page 19 Calibration Furnace Product Components Rear Plug Thermal Block gxs121.eps gxs133.eps Figure 2. Front View with Isothermal Block Figure 3. Rear View with Isothermal Block...

  • Page 20: Front-Panel Controls

    9118A Users Manual Front-Panel Controls Figure 4 shows the front-panel controls of the Product and Table 2 is a list of control descriptions. gxs007.eps Figure 4. Front-Panel Controls...
  • Page 21 Calibration Furnace Product Components Table 2. Front-Panel Controls Item Description Item Description LCD Display Mains power switch   Used to set a value into the Product and choose a Set a temperature setpoint into the Product.   menu. Sets the Product to show temperatures in Celsius or Menu button shows the main menu in the display.

  • Page 22: Rear-Panel Connections

    9118A Users Manual Rear-Panel Connections Figure 5 shows the rear-panel connections of the Product and Table 3 is a list of connector descriptions. N10140 ZONE TC MAIN TC BEFORE OPENING DISCONNECT MAINS. 230V 50/60Hz 20A Serial no. RS-232 EARTH CONNECTION ESSENTIAL BEFORE CONNECTING SUPPLY.
  • Page 23 Calibration Furnace Product Components Table 3. Rear-Panel Connections Item Description Item Description Mains power cord Main thermocouple input jack   Protective Earth Terminal USB connector   Zone thermocouple input jack RS-232 connector  ...
  • Page 24 Product. To install two protection tubes and a thermocouple (TC) support bracket and optional isothermal block (9118A- ITB): 1. Remove the five socket-head screws and take down the rear shield from unit. See Figure 6.
  • Page 25 2. Insert the long and short protection tubes into flange 3. This step is only for the optional isothermal block nuts and screw them into position. (9118A-ITB). Insert the rear plug carefully into position. See Figure 8. • Long tube in the right side.
  • Page 26 9118A Users Manual 4. Attach the rear shield with the five socket-head 5. Install the thermocouple support bracket on the rear screws. See Figure 9. shield. See Figure 10. Rear Shield Rear Shield Socket Head Screw TC Support Bracket gxs127.eps Figure 9.

  • Page 27: Probe Installation

    Product Components 6. This step is only for the optional isothermal block Probe Installation (9118A-ITB). Insert the isothermal block into the Note ceramic tube from the front side of the Product. See When you put the temperature control probes into Figure 6.
  • Page 28 9118A Users Manual Support Bracket Zone TC N10 140 ZO NE TC BE FO RE OP EN ING DIS MA IN TC CO NN EC T 230 V 50/ 60H MA INS . z 20A EA RTH CO NN EC TIO N...
  • Page 29 Calibration Furnace Product Components Zone TC Handle Locking Screw Main TC Handle Align these two surfaces Support Bracket gxs132.eps Figure 13. Probe Installation B...

  • Page 30: The Isothermal Block

    9118A Users Manual  Caution accurate temperature environment for the sensor under test. Four 6.7 mm diameter wells are provided. To prevent damage to the thermocouple, do not over tighten the screw. To install the insert: To prevent contamination of the thermocouple, 1.

  • Page 31: Connect To Mains Power

     Warning For safe operation and maintenance of the product, remove moisture from the Product before you connect to mains power. Fluke Calibration recommends the Product be put in a low humidity temperature chamber at 50 °C for 4 hours or more.

  • Page 32: How To Turn Off The Product

    9118A Users Manual When the self test is complete and no errors are sensed, How to Turn Off the Product the screen shown in Figure 16 shows in the display. The Product is in a standby mode. You must set a setpoint Warning...

  • Page 33: Display

    Calibration Furnace Display Display Setup Table 4 is a list of display elements with descriptions. Set the Language Text in the LCD display can be set to show in a different Table 4. Display Elements language. To set the language: 1.

  • Page 34: Operation

    Warning • Remove moisture from the Product before To avoid personal injury or skin irritation, wear you connect to mains power. Fluke disposable latex gloves (or equivalent) when Calibration recommends the Product be handling fiber ceramic material. put in a low humidity temperature chamber The front-panel controls let you set the parameters of the at 50 °C for 4 hours or more.

  • Page 35: How To Set Parameters In The Product

    Calibration Furnace Operation 4. Push  when the correct preset number is shown How to Set Parameters in the Product in the display. There are two methods to set a parameter in the Product. You can set a parameter from a list of values or in the This is the selection method for value lists.

  • Page 36: Softkey Menus

    9118A Users Manual 3. Push  or  to increase or decrease the highlighted digit. 4. Push  to move the highlight to the next digit. 5. Do steps 3 and 4 again for each digit in the number. 6. After all digits are set, push .
  • Page 37 Calibration Furnace Operation MENU gxs003.eps Figure 19. Softkey Menu Tree...
  • Page 38 9118A Users Manual TEMP PROG SYSTEM SETUP MENU MENU POINTS MENU To B To C To E To F Set up to 8 setpoints SETUP CUTOUT FURNACE POINTS SETUP SETUP Set soft cutout Scan Rate View hard cutout Set calibration...

  • Page 39: Temperature (Temp) Setup Menu

    Use the soft cutout parameter to cut out at the high heats or cools to the programmed setpoint and holds that temperature limit of the probes under calibration. Fluke temperature for the specified time. Calibration recommends you set the cutout 5 °C to 10 °C below the high temperature limit of the probe under test.

  • Page 40: Run Prog Function

    9118A Users Manual The SOAK TIME parameter is used to set the number of Calibration (CAL) Points Menu minutes each setpoint temperature is held before it When you push the CAL POINTS softkey, the product changes to the subsequent setpoint. Soak time starts prompts you for a numeric password.

  • Page 41: Pid Setup Menu

    Calibration Furnace Operation PID Setup Menu Caution The Product can be used with or without an The PID SETUP menu is used to set controller isothermal block installed. To prevent damage parameters. to the Product, unique calibration parameters The TEMP PB parameter is the main proportional band are necessary for each mode of operation.

  • Page 42: Password Setup Menu

    9118A Users Manual The LINEFEED parameter turns on and turns off the line Set the Furnace Temperature with a Preset feed character sent across the RS-232 communications The Product stores eight preset setpoint temperatures. port. You can set each preset setpoint as necessary. To set the...

  • Page 43: Set The Furnace Temperature Manually

    Calibration Furnace Operation Set the Furnace Temperature Manually Change a Preset Temperature To adjust the furnace temperature manually: You can set the temperature of the eight presets. To change a preset temperature: 1. Push . 1. Push . 2. Push . 2.

  • Page 44: Probe Insertion

    ±10 °C of the temperature limit of the equipment under calibration. Note Fluke Calibration recommends you use a metal and/or ceramic fiber surface or container to set hot probes on. For the best stable temperature and minimum gradient, put...

  • Page 45: Hard Cutout

    Calibration Furnace Remote Operation When the soft cutout turns off power to the furnace, probes opens. This cutout also turns off the furnace if it is CUTOUT shows in the display. The Product stays in this in the heat mode and the temperature of the furnace does condition until the temperature of the furnace goes below not increase.

  • Page 46: Digital Communication Interface

    9 NC gxs005.eps Figure 23. RS-232 Cable Connections To use the USB interface for remote operation, you must install a driver on the PC. The driver is found on the 9118A CD-ROM. To get an up-to-date USB driver, go to http://www.ftdichip.com/Drivers/VCP.thm.

  • Page 47: How To Configure The Digital Interface

    Calibration Furnace Remote Operation How to Configure the Digital Interface SCPI Commands To control the Product with a PC, you must set the This section gives all SCPI commands recognized by the parameters of the digital interface in the Product. To set Product with their description and syntax rules.
  • Page 48 9118A Users Manual Table 5. Commands by Function or Group Group Screen Parameter Command Password Group Read/Write Calibration – Controller TEMP PB SOUR:LCON:PBAN Unconditional TEMP INT SOUR:LCON:INT Unconditional TEMP DER SOUR:LCON:DER Unconditional Calibration – Heat Source TEMP 1 SOUR:SENS:CAL:PAR1 Unconditional...
  • Page 49 Calibration Furnace Remote Operation Table 5. Commands by Function or Group (cont.) Group Screen Parameter Command Password Group Read/Write Main Screen (none) SOUR:SENS:DATA SETPT SOUR:SPO HEAT % OUTP1:DATA (none) OUTP2:DATA ENABLE OUTP1:STAT Program – Run TEST STATUS PROG:STAT Program - Setup TEST ID PROG:IDEN Ramp &...
  • Page 50 9118A Users Manual Table 5. Commands by Function or Group (cont.) Group Screen Parameter Command Password Group Read/Write Ramp & Soak (cont.) SETPOINT 5 SOUR:LIST:SPO5 SETPOINT 6 SOUR:LIST:SPO6 SETPOINT 7 SOUR:LIST:SPO7 SETPOINT 8 SOUR:LIST:SPO8 Setup – Communications BAUD RATE SYST:COMM:SER:BAUD...
  • Page 51 Calibration Furnace Remote Operation Table 5. Commands by Function or Group (cont.) Group Screen Parameter Command Password Group Read/Write System – Information (none) SYST:ERR (all) *IDN (none) *CLS (none) *OPT FW VER SYST:CODE:VERS Temperature – Cutout HARD CUTOUT SOUR:PROT:HCUT SOFT CUTOUT SOUR:PROT:SCUT:LEV Conditional Reset...

  • Page 52: Alphabetic List Of Commands

    Clears all status registers. Example: *CLS Response: None *IDN? Gets manufacturer, model number, serial number and firmware version of the product. Example: *IDN? Response: FLUKE,9118A,0,4.03 *OPT? Gets product configuration or reference functionality. Example: *OPT? Response: 1 Reference hardware is enabled. (0 = disabled)
  • Page 53 Calibration Furnace Alphabetic List of Commands OUTPut:STATus <n> Sets or gets the main heat output on or off. Parameters: ON or 1 Turn on main heat. OFF or 0 Turn off main heat. Example: Turn on main heat. OUTP:STAT 1 OUTPut:STATus? Gets the main heat output on or off.
  • Page 54 9118A Users Manual PROGram:IDEN? <quoted string> Gets the program identifier. Example: IDEN? Response: TEST-1 PROGram:SEQ:CAT? Gets a parameters list for ramp and soak tests. Example: PROG:SEQ:CAT? Response: “SPOn”,”DWELL”,”DIR”,”POIN”,”CYCL” PROGram:SEQ:PAR <Par>[, n] Set a parameter in the ramp/soak test. Parameters: x = 1 to 8 setpoint number. Default = 1. n = 300.00 to 1200.00. Default = 300.00.
  • Page 55 Calibration Furnace Alphabetic List of Commands PROGram:SEQ:PAR? <Par> Get a parameter from the ramp/soak test. Parameters: x = 1 to 8 setpoint number. Default = 1. Gets setpoint temperature for the setpoint SPO[x] number. Gets soak time DWEL Gets the number of setpoints in the ramp/soak test. POIN Gets the number of times the ramp/soak test is to be repeated.
  • Page 56 9118A Users Manual SOURce:LCON:DER <n> Sets the main control derivative time in seconds. Note This command has password protection. Use the SYST:PASS:CEN command first before you use this command to set this value. Parameters: 0.0 to 99.9 seconds. Example: SOUR:LCON:DER 5 SOURce:LCON:DER? Gets the main control derivative time in seconds.
  • Page 57 Calibration Furnace Alphabetic List of Commands SOURce:LCON:PBAN <n> Sets the main control proportional band in °C which the PID controller uses for main zone control. 1.0 to 199.9 °C Parameters: Example: SOUR:LCON:PBAN 7 SOURce:LCON:PBAN? Gets the main control proportional band in °C which the PID controller uses for main zone control. Example: SOUR:LCON:PBAN? The main control loop proportional band is 1.5 °C.
  • Page 58 9118A Users Manual SOURce:PROT:CLEA Resets the cutout to enable the Product. Example: SOUR:PROT:CLEA Response: None If the furnace goes above the maximum temperature, the cutout circuit will trip. The Product does not heat or cool until the cutout condition is cleared.
  • Page 59 Calibration Furnace Alphabetic List of Commands SOURce:RATE <n> Sets the control temperature rate of change (scan rate) in °C or °F per minute. Parameters: 0.10 to 500.00 degrees per minute. Default = 100.00 Example: Sets the scan rate to 1.26 degrees per minute. SOUR:RATE 1.26 SOURce:RATE? Gets the control temperature rate of change (scan rate) in °C or °F per minute.
  • Page 60 9118A Users Manual SOURce:SENS:CAL:PAR<x> [n] Sets a control temperature calibration parameter. Note This command has password protection. Use the SYST:PASS:CEN command first before you use this command to set this value. Parameters: 1 to 3 (1 = PAR1 = TEMP 1, 2 = PAR2 = TEMP 2, 3 = PAR3 = TEMP 3, 4 = TEMP 4) -50.00 to +50.00 (Default = 0.000)
  • Page 61 Calibration Furnace Alphabetic List of Commands -10.00 to 10.00 Example: SOUR:SENS:CAL:SKEW2 0.08 SOURce:SENS:CAL:SKEW<x>? Gets an axial compensation adjustment parameter. Example: SOUR:SENS:CAL:SKEW2? Response: 0.05 The axial compensation for SKEW2 is 0.05 of the main heater power. SYST:CONF:BLC [n] Sets the furnace work mode with the isothermal block inside or without the isothermal block inside. Parameters: =0 determines if the furnace will work without the isothermal block inside =1 determines if the furnace will work with the isothermal block inside...
  • Page 62 9118A Users Manual Response: 700.00 Main temperature is 700.00 degrees. Example: SOUR:SENS:DATA? FULL Response: 700.00,600.00 Main temperature is 700.00 degrees and zone temperature is 600.00 degrees. SOURce:SENS:DATA? [sensor function] Gets sensor temperature in °C or °F. Parameters: function = CJC – CJC Senor temperature MTC –...
  • Page 63 Calibration Furnace Alphabetic List of Commands Parameters: ON or 1 Turn on keyboard beep. (Default) OFF or 0 Turn off keyboard beep. Example: Turn on keyboard beep. SYST:BEEP 1 SYSTem:BEEP:KEYB? Gets the state of the keyboard beep function. Example: SYST:BEEP? Response: 0 keyboard beep is off.
  • Page 64 9118A Users Manual Parameters: ON or 1 Turn on line feed character. OFF or 0 Turn off line feed character. (Default) Example: Turn on line feed character. SYST:COMM:SER:LIN 1 SYSTem:COMM:SER:LIN? Gets the use of a line feed character at the end of data sent out the serial interface.
  • Page 65 Calibration Furnace Alphabetic List of Commands SYSTem:DEC:FORM? Gets the decimal format. Example: SYST:DEC:FORM? Response: 0 Decimal format is set to period. SYSTem:KLOC <n> Sets the status of the front-panel keypad lock. Note This command has password protection. Use the SYST:PASS:CEN command first before you use this command to set this value.
  • Page 66 9118A Users Manual SYSTem:LANG? Gets the display language. Example: SYST:LANG? Response: 1 The display language is set to English. SYSTem:PASS:CDIS Disable access to commands with password protection. Example: SYST:PASS:CDIS This command has no response. SYSTem:PASS:CEN [n] Enables access to commands with password protection.
  • Page 67 Calibration Furnace Alphabetic List of Commands Note This command has password protection. Use the SYST:PASS:CEN command first before you use this command to set this value. Parameters: 0000 to 9999 Sets the password to 1234. Example: Sets the password to 1045. SYST:PASS:NEW 1045 This command has no response.
  • Page 68 9118A Users Manual UNIT:TEMP [n] Sets the display temperature units. Parameters: C – Centigrade (Default) F - Fahrenheit Example: Sets the display temperature units to Centigrade. UNIT:TEMP C UNIT:TEMP? Gets the display temperature units. Example: UNIT:TEMP? Response: F Display temperature units is set to Fahrenheit.

  • Page 69: Maintenance

    Hazardous Product. voltage exposure is possible. Fluke Calibration recommends that you do an axial • Use only specified replacement parts. uniformity test when you receive the Product and at •...

  • Page 70: Cutout Test

    How to Clean the Product Clean the Product surfaces with a damp cloth and mild Fluke Calibration recommends you do a minimum of one detergent. Make sure liquids do not go into the Product. cutout test in 6 months. To do a cutout test: Note 1.

  • Page 71: Calibration Terminology

    Calibration Furnace Maintenance Calibration Terminology Calibration As Found Data: Data measured on the UUT before it is Product calibration uses a stability test, uniformity test, and adjusted. adjustment, followed by an accuracy test and adjustment. All tests and adjustments are done at different As Left Data: Data measured on the UUT after it is temperatures across the range of the Product.
  • Page 72 9118A Users Manual Prepare Test Equipment and Power Take As Found Data for stability Calculate the accuracy Fail Set setpoint Pass/Fail Set the accuracy parameter Pass Heat On Take As Found Data for Take As Found Data Axial Uniformity for stability...
  • Page 73 Calibration Furnace Maintenance Table 7 is a list of Furnace calibration tests and adjustments. Table 7. Furnace Calibration Tests and Adjustments Test Name Test Points (°C) Notes As Found/As Left data to verify the temperature Stability Test 300, 700, 1000, 1200 stability –...

  • Page 74: Calibration Procedure For Tube Furnace

    9118A Users Manual 1. Connect the test equipment as shown in Figure 25. Calibration Procedure for Tube Note Furnace In the steps that follow, start the calibration Caution ° procedure at the lowest temperature (300 C) and The Product can be used with or without an °...
  • Page 75 Calibration Furnace Calibration Procedure for Tube Furnace Ice Point gxs120.eps Figure 25. Test Equipment Connections...
  • Page 76 9118A Users Manual Table 8. Stability Test Data Stability Test Setpoint Stabilization Stability 2σ Limit The 7 steps that follow find the As Found and As Left Samples (°C) Time (min) (±°C) data for stability. 3. Push  to start the furnace.
  • Page 77 Calibration Furnace Calibration Procedure for Tube Furnace 13. Do steps 10 through 12 again for each position in SKEW = SKEW + A x (Slope) n(new) n(old) Table 9. 18. Table 10 shows the value for A at each of the Note temperature setpoints.
  • Page 78 9118A Users Manual 21. Do steps 10 through 13 again to make sure axial Table 13. ZONE Parameter uniformity is equal to or less than the specification. Parameter Setpoint The difference between the maximum and minimum (°C) values in the difference row of Table 9 must be...
  • Page 79 Calibration Furnace Calibration Procedure for Tube Furnace Accuracy Test Table 14. Accuracy Parameter Parameter Note Setpoint Make sure TC1 is at the midpoint in the access (°C) RS-232 Command Front Panel tube (0 MM) when you do an accuracy test. SOUR:SENS:CAL:PAR1 TEMP (300) To do an accuracy test:...

  • Page 80: Calibration Procedure For 9118A-Itb (With Isothermal Block)

    9118A Users Manual Calibration procedure for 9118A-ITB (with Calibration Equipment Setup Isothermal Block) 1. Mark scales on TC1 and TC2 as shown in Figure 26. Scale interval is 10 mm. Caution 2. Connect equipment as shown in Figure 25. The furnace can be used with or without an isothermal block installed.
  • Page 81 Calibration Furnace Calibration Procedure for Tube Furnace 365.50 mm (14.39 inch) 305.50 mm (12.03 inch) Isothermal Block Front Plug Guide Tube Insulator gxs134.eps Figure 26. Calibration Equipment Setup...
  • Page 82 9118A Users Manual Prepare Test Equipment and Power Calculate the Axial uniformaty Calculate the Zone Set setpoint Take As Found Data for Set the Zone align Axial Uniformity parameter Heat On Pass/Fail Take As Found Data for stability Fail Test the stabiltiy...

  • Page 83: Stability Test

    Calibration Furnace Calibration Procedure for Tube Furnace 7. Record the result. Stability Test The steps that follow find the As Found and As Left data After the stability of the set temperature is verified, it is for stability. recommended that you do the accuracy test that follows. 1.

  • Page 84: Accuracy Adjustment

    9118A Users Manual Accuracy Adjustment Axial Uniformity To do an accuracy adjustment: The steps that follow make up the axial uniformity test and the formulae to calculate the SKEW and ZONE parameter 1. Calculate the new TEMP parameter with: values. The new values are put into the Product to correct for axial temperature gradients.
  • Page 85 Calibration Furnace Calibration Procedure for Tube Furnace Table 17. Axial Uniformity Test with Isothermal Block 60 mm 50 mm 40 mm 30 mm 20 mm 10 mm 0 mm TC1(fixed @0 mm) TC2(test in each position from 60 mm to 0 mm) Difference(x), x=60,50,40,…,0 mm 6.
  • Page 86 SKEW parameters. adjustment. If the absolute value of slope of every adjustment does not show the trend of decreasing, Table 19. SKEW Parameter for Isothermal Block contact an authorized Fluke Calibration Service Parameter Setpoint Center. (°C) 13.
  • Page 87 Calibration Furnace Calibration Procedure for Tube Furnace Table 20 shows the value for B at each temperature Table 21. Zone Parameter for Isothermal Block setpoint. Parameter Setpoint Table 20. Zone Correction Values For Isothermal Block (°C) RS-232 Command Front Panel Calibration Point B Value SOUR:SENS:CAL:ZONE1...

  • Page 88: Specifications For 9118A And 9118A-Itb

    9118A Users Manual Specifications for 9118A and 9118A-ITB General Specifications Operating Conditions Operating Temperature ............... 5 °C to 40 °C Storage Temperature ..............-20 °C to 70 °C Humidity ..................80 % maximum for temperatures <31 °C, decreasing linearly to 50 % at 40 °C Altitude ..................

  • Page 89: Accuracy Specifications

    Calibration Furnace Specifications for 9118A and 9118A-ITB Accuracy Specifications All accuracy specifications except temperature are for a period of 1 year after calibration, at 13 °C to 33 °C. Note The furnace can be used with or without an isothermal block installed. Unique calibration parameters are necessary for each configuration.

  • Page 90: Heating Time (23 °C To 1200 °C)

    9118A Users Manual ° ° Heating Time (23 C to 1200 9118A ....................40 minutes 9118A-ITB ..................45 minutes ° ° Cooling Time (1200 C to 300 9118A ....................180 minutes 9118A-ITB ..................200 minutes...

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