OM-222166 Page 47
8-2.
Calibration Verification Equipment
1
Thermocoupler Calibrator
Suggested calibrator from Fluke item 714
or equivalent.
2
Type K Mini Connector
Suggested connector from Fluke item
80CK−M or equivalent.
A length of type K thermocouple wire is
required. Connect red to negative and
yellow to positive when wiring connectors.
3
Type K 2-Pin Male Connector
Suggested connector from Newport item
OST−K−M or equivalent
4
Calibration Label
Suggested label from Q−CEES item
QCC306BU or equivalent.
5
Precision Digital Voltmeter (DVM)
Suggested meters are Agilent Multimeter
or Hewlett Packard Multimeter Model
34401A or equivalent. DVM must be able
to read to three decimal places (0.000).
6
Interconnecting Cable
MILLER Part No. 300168 can be used to
connect the Recorder to the DC power
supply.
1
6
4
2
5
3
8-3.
Calibration Verification Procedure
Calibration verification should be done every year. Use appropriate Certificate of Calibration to record calibration information. A spreadsheet could also
be used to record the information.
8-3-1.
Initial Set Up
1.
Power switch off
2.
Have qualified person connect primary power to ProHeat 35.
3.
Turn ProHeat 35 power switch on.
4.
Press and hold the Program button, then press Parameters to enter setup mode.
5.
Press Cursor button 4 times to get to Control Mode line.
6.
Press the Decrease button to change to Manual, if necessary.
7.
Press the Run Status button. (TC5 and TC6 will show in upper right-hand corner of display)
8.
Let unit idle for a minimum of 15 minutes before checking calibration.
9.
Turn on Fluke 714 Thermocouple Calibrator and Precision DVM. Leave them on for a minimum of 15 minutes before checking calibration.
10.
Verify TC1 and TC2 are set to K-Type. See Section 7-4 for detailed instructions.
8-3-2.
TC Input/Output Check
1.
Connect precision DVM (DC Volts set to display in thousandths) to RC9. This is the top connector located on the back of the ProHeat 35. Red
lead to pin 1 and black to pin 5.
2.
Set TC calibrator to 382.0
°
F or 194.5
°
C. Connect to TC1 input jack on front of ProHeat.
3.
Verify TC display value of (
±
3
°
F) or (
±
2
°
C). RC9 output has a tolerance of (
±
6
°
F) or (
±
3.3
°
C). DVM reads 2.787 VDC (
±
0.038) (2.749 – 2.825).
4.
Enter DVM values into calibration certificate If you are creating your own spreadsheet use the following calculation.
The voltage to temperature calculation is:
(DC Volts Out x 155) − 50 =
°
F
(DC Volts Out x 86.1) − 45.4 =
°
C
5.
Repeat steps 1.−4. for TC2 – TC6 input jacks.
For TC2 move red precision DVM lead to RC9 pin 2.
For TC3 move red precision DVM lead to RC9 pin 3.
For TC4 move red precision DVM lead to RC9 pin 4.
For TC5 move red precision DVM lead to RC9 pin 6.
For TC6 move red precision DVM lead to RC9 pin 7.
Note: TC5 and TC6 will show in upper right-hand corner of display.
6.
Repeat steps 1.−5. with TC calibrator set to 882.0
°
F or 472.2
°
C, verify TC display value (
±
3
°
F) or (
±
2
°
C). RC9 output has a tolerance of (
±
6
°
F)
or (
±
3.3
°
C). DVM reads 6.013 VDC (
±
0.038) (5.975 – 6.041).
7.
Repeat steps 1.−5. with TC calibrator set to 1382.0
°
F or 750
°
C, verify TC display value (
±
3
°
F) or (
±
2
°
C). RC9 output has a tolerance of (
±
6
°
F)
or (
±
3.3
°
C). DVM reads 9.239 VDC (
±
0.038) (9.201 – 9.277).
Содержание 907271
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