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9009

User’s Guide

20

Calibrator Characteristics

There is a temperature gradient vertically in the test well. The heater has been applied to the block in 
such a way as to compensate for nominal heat losses out of the top of the calibrator. However, actual 
heat losses will vary with design of the thermometer probes inserted into the calibrator. For best 
results, insert probe to full depth of well.

Stabilization and Accuracy

The stabilization time of the Product depends on the conditions and temperatures involved. Typically

,

 

the test well will be stable to 0.1 

°

C within 5 minutes of reaching the set-point temperature. Ultimate 

stability is achieved 10 minutes to 20 minutes after the Product reaches the set temperature.
If you insert another cold probe into a well

,

 this requires another period of stabilizing, depending on the 

magnitude of the disturbance and the required accuracy. For example, if you insert a .25

-

in diameter 

room temperature probe at 300 

°

C

,

 it takes 5 minutes to be within 0.1 

°

C of its settled point and takes 

10

 

minutes to achieve maximum stability.

To speed up the calibration process, know how soon to make the measurement. Make typical 
measurements at the desired temperatures with the test probes under test to establish these times.

Calibration

Note 

Consider this procedure a general guideline. Each laboratory must write their own procedure 
based on their equipment and their quality program. Each procedure should be accompanied 
by an uncertainty analysis also based on the equipment and environment of the laboratory

.

You may want to calibrate the Product to improve the temperature set-point accuracy. To adjust 
calibration

,

 adjust the controller probe calibration constants R0, ALPHA, DELTA, and BETA (cold side) 

so that the temperature of the Product as measured with a standard thermometer agrees more closely 
with the set-point. The thermometer used must be able to measure the well temperature with higher 
accuracy than the desired accuracy of the Product. Use a good thermometer and this calibration 
procedure to calibrate the Product to an accuracy of better than 0.5 

°

C up to 100 

°

C.

Calibration Points

When you calibrate the Product, adjust R0, ALPHA, DELTA, and BETA (cold side) to minimize the set-
point error at each of three different Product temperatures. Any three reasonably separated 
temperatures can be used for the calibration. Improved results can be obtained for shorter ranges 
when you use temperatures that are just within the most useful operating range of the Product. The 
farther apart the calibration temperatures, the larger will be the calibrated temperature range, but the 
calibration error will also be greater over the range. Choosing a range of 50 

°

C to 90 

°

C may allow the 

calibrator to have a better accuracy of maybe 

±

0.2 

°

C over that range

,

 but outside that range the 

accuracy may be only 

±

1.5 

°

C.

Содержание 9009

Страница 1: ...9009 Industrial Dual Block Calibrator User s Guide February 2013 Rev 1 3 22 2013 2022 Fluke Corporation All rights reserved Specifications are subject to change without notice ...

Страница 2: ... nearest Fluke authorized service center to obtain return authorization information then send the product to that service center with a description of the difficulty postage and insurance prepaid FOB Destination Fluke assumes no risk for damage in transit Following warranty repair the product will be returned to Buyer transportation prepaid FOB Destination If Fluke determines that failure was caus...

Страница 3: ... 6 General Operation 7 Change Display Units 7 Set the Temperature 7 Controller Operation 7 Well Temperature 7 Temperature Set point 8 Programmable Set points 8 Set point Value 8 Temperature Scale Units 10 Scan 10 Scan Control 10 Scan Rate 10 Secondary Menu 10 Heater Power 11 Proportional Band 11 Controller Configuration 12 Operating Parameters 12 Serial Interface Parameters 13 Serial Interface Set...

Страница 4: ... Serial Operation 16 Interface Commands 17 Calibrate a Single Probe 19 Calibrator Characteristics 20 Stabilization and Accuracy 20 Calibration 20 Calibration Points 20 Calibration Procedure 21 Compute DELTA 21 Compute R0 ALPHA 22 Compute BETA Cold Side Only 22 Accuracy and Repeatability 23 Maintenance 23 Troubleshooting Problems Possible Causes and Solutions 23 ...

Страница 5: ...se RS 232 interface Built in programmable features include applicable to both the hot and cold blocks Temperature scan rate control Eight Set point memory Adjustable readout in C or F The temperature of each well is accurately controlled by a precision controller The controller uses a precision platinum RTD as a sensor and controls the well temperature with a solid state relay triac driven heater ...

Страница 6: ... device The Product is a precision instrument Although it has optimum durability and trouble free operation it must be handled with care Most probes have handle temperature limits Be sure that the probe handle temperature limit is not exceeded in the air above the instrument The instrument and any thermometer probes used with it are sensitive instruments that can be easily damaged Always handle th...

Страница 7: ...232 Cable Insert Removal Tool Set Up To set up the Product 1 Place the Product on a flat surface with at least 457 mm 18 in of clearance above the instrument 2 Plug the power cord into a grounded mains outlet Make sure that the nominal voltage corresponds to that indicated on the Product see the specifications in the printed Safety Information 3 Check that the well is clear of any foreign objects ...

Страница 8: ...ter or terminal with serial RS 232 communications G Constant Temperature Block Assemblies Calibrate two sensors at once or use one well for a reference thermometer See Constant Temperature Block for additional details 9009 DUAL BLOCK CALIBRATOR SET DOWN UP EXIT SET DOWN UP HIGH TEMP DUAL B LOCK CALIB R ATOR R S 232 EXIT LOW TEMP BEFORE CLOSING LID REMOVE ALL PROBES FROM TEMPERATURE WELLS COOL TEMP...

Страница 9: ...r Description Number Description C Hot Display Both displays not only shows the set and actual temperatures but also shows various calibrator functions settings and constants The display shows temperatures in units according to the selected scale C or F The High Temp and Low Temp displays are labeled H PEM The power switch is located on the PEM The PEM also houses the fuse D Controller Keypad Use ...

Страница 10: ...ature Block Table 2 Accessories Model Description 3102 0 Blank Insert 3102 1 1 6 mm 1 16 in Insert 3102 2 3 2 mm 1 8 in Insert 3102 3 4 8 mm 3 16 in Insert 3102 4 6 4 mm 1 4 in Insert 3102 5 7 9 mm 5 16 in Insert 3102 6 9 5 mm 3 8 in Insert 3102 7 11 1 mm 7 16 in Insert 3102 8 4 0 mm 5 32 in Insert Removable insert sleeves 12 7 mm 1 2 in O D x 101 6 mm 4 in deep Calibration Wells ...

Страница 11: ...he set point temperature The well can require 5 minutes to 10 minutes to reach the set point depending on the span Another 5 minutes to 10 minutes is required to stabilize within 0 1 C of the set point Ultimate stability can take 15 minutes to 20 minutes more of stabilization time Controller Operation Use the front panel to monitor the well temperature set the temperature set point in degrees C or...

Страница 12: ...hows at the left on the display followed by the current set point value 100 0 C Well temperature in degrees Celsius Push SET Access set point memory 1 100 Set point memory is currently set to 1 101 C To change the set point memory push UP or DOWN 4 300 New set point memory is 4 300 C Push SET to accept the new selection and access the set point value Set point Value To adjust the set point after y...

Страница 13: ...Industrial Dual Block Calibrator General Operation 9 Figure 2 Controller Operation Flowchart ...

Страница 14: ...tinue Scan Rate The next function in the main menu is the scan rate Set the scan rate from 1 C min to 99 9 C min The maximum scan rate however is limited by the natural heating or cooling rate of the instrument This is often 100 C min especially when cooling The scan rate function appears in the main menu after the scan control function The scan rate units are in degrees C of F per minute dependin...

Страница 15: ...mperature Push SET and EXIT Access heater power in secondary menu SEC Flashes for secondary menu then shows the heater power 13 0 P Heater power in percent To exit out of the secondary menu push and hold EXIT To continue to the proportional band setting function push EXIT momentarily or SET Proportional Band In a proportional controller such as this heater output power is proportional to the well ...

Страница 16: ...ing the new value Controller Configuration The controller has several configuration and operating options and calibration parameters which are programmable through the front panel To access these push SET from the secondary menu after the proportional band The display shows Config and then PAr for the first of three sets of configuration parameters operating parameters serial interface parameters ...

Страница 17: ...ameter menu The BAUD rate the sample rate the duplex mode and the linefeed parameter are in the serial interface parameters menu BAUD Rate The BAUD rate setting determines the serial communications transmission rate The BAUD rate parameter is indicated by bAUd Flashes bAUd and then displays the setting 2400 b Current BAUD rate The BAUD rate of serial communications is programmable to 300 BAUD 600 ...

Страница 18: ...N and SET LF OFF New linefeed setting Calibration Parameters The controller gives access to a number of the Product calibration constants R0 ALPHA DELTA and BETA cold side only These values are set at the factory and should not be altered The correct values are important to the accuracy and proper and safe operation of the Product Access to these parameters is available so that if the controller m...

Страница 19: ...ctory for best instrument accuracy DELTA This probe parameter characterizes the curvature of the resistance temperature relationship of the sensor The value of this parameter is set at the factory for best instrument accuracy BETA Low Temp Only This probe parameter characterizes the low temperatures The value of this parameter is set at the factory for best instrument accuracy Digital Communicatio...

Страница 20: ...erial Cable Wiring Serial Operation Once the cable has been attached and the interface set up properly the controller immediately begins to transmit temperature readings at the programmed rate Serial communications uses 8 data bits one stop bit and no parity The set point and other commands can be sent through the serial interface to set the temperature set point and view or program the various pa...

Страница 21: ...to the minimum number of letters which determines a unique command A command may be used to either set a parameter or display a parameter depending on whether there is a value sent with the command following a character For example s CR returns the current set point and s 150 0 CR sets the set point to 150 0 degrees In the list of commands in Table 3 characters or data within brackets and are opti...

Страница 22: ...sr srat 99 9 C or F min srat 12 4C min Set scan rate sr ate n sr 1 1 1 to 99 9 Secondary Menu Read proportional band setting pr opband pr pb 999 9 pb 15 9 Set proportional band to n pr opband n pr 8 83 Depends on Configuration Read heater power duty cycle po wer po po 999 9 po 1 3 Configuration Menu Operating Parameters Menu Read High Limit hl hl hl 999 hl 350 Set High Limit hl n hl 350 Cold 25 to...

Страница 23: ...r binding and damage to your probe Command Description Command Format1 Command Example2 Returned Returned Example Acceptable Values Calibration Parameters Menu Read R0 calibration parameter r 0 r r0 999 999 r0 100 578 Set R0 calibration parameter to n r 0 n r 100 324 100 to 105 Read ALPHA calibration parameter al pha al al 9 9999999 al 0 0038573 Set ALPHA calibration parameter to n al pha n al 0 0...

Страница 24: ...ach laboratory must write their own procedure based on their equipment and their quality program Each procedure should be accompanied by an uncertainty analysis also based on the equipment and environment of the laboratory You may want to calibrate the Product to improve the temperature set point accuracy To adjust calibration adjust the controller probe calibration constants R0 ALPHA DELTA and BE...

Страница 25: ...rite these values down as T1 and R1 respectively 3 Repeat step 2 for the other set points and record them as T1 R1 T2 R2 T3 R3 T4 and R4 respectively 4 Use the recorded data to calculate new values for R0 ALPHA DELTA BETA parameters with the equations given below Compute DELTA A T4 T3 B T3 T2 E R4 R3 F R3 R2 Where T1 4 Measured temperature using thermometer R1 4 Value of R from display of Product ...

Страница 26: ... and BETA cold side only into the calibrator with these steps 1 Push the SET and EXIT simultaneously and then push SET until R0 shows 2 Push SET then use the UP or DOWN keys until the correct numerical setting shows 3 Pus SET to accept the new value 4 Repeat step 2 for ALPHA DELTA and BETA cold side only a T delta T T 1 2 2 2 100 1 100 a T delta T T 3 4 4 4 100 1 100 rzero R a R a a a 4 1 2 3 1 3 ...

Страница 27: ...sert it into the well If there is any chance of jamming the sleeve in the well file or grind off the protuberance Do not slam the probe stems into the well This can cause a shock to the sensor If a hazardous material is spilled on or inside the Product take the appropriate decontamination steps as outlined by the national safety council with respect to the material If the mains supply cord becomes...

Страница 28: ...can may be on with the Scan Rate set low Controller locks up Initialize the system with the Master Reset Sequence If the Product repeats the error code contact an Authorized Service Center Master Reset Sequence The Master Reset must be done on the cold side However both the cold and the hot sides are reset Hold SET and EXIT down on the cold side at the same time while you power up the Product The ...

Страница 29: ... need to be calibrated If so contact a service center If the display changes more than twice the normal display deviation another Product in the area could be emitting RF energy Move the Product to a different location and rotate the Product again If the temperature is correct in this new area or deviates differently than the first are RF energy is present in the room If you must perform the test ...

Страница 30: ...9009 User s Guide 26 ...

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