FLT
®
Series FlexSwitch
TM
APPENDIX D - TEMP COMP
Fluid Components International LLC
93
POWER SUPPLY SETTINGS
FLT93S
3 Watts
1.75 Watts
0.75 Watts
0.21 Watts
Set For 18.0 Vdc
Set For 13.8 Vdc
Set For 9.0 Vdc
Set For 4.9 Vdc
FLT93F
0.57 Watts
0.52 Watts
0.49 Watts
0.25 Watts
Set For 18.0 Vdc
Set For 17.0 Vdc
Set For 15.0 Vdc
Set For 11.8 Vdc
Table D-1. Heater Voltage Settings
10. Raise the temperature of the process media to the maximum expected temperature. The difference between the low and the high tem-
perature is not to exceed 100 °F.
11. Set the flow rate to the same value used for the low temperature.
Note:
The flow rate must be the same at both the low and high temperature. For gases, the flow rate must be held constant in
terms of volumetric flow rate (SCFM, NCMH, etc.).
12. With the instrument power on, let the instrument stabilize for fifteen minutes.
13. Record the resistance values of the active and reference RTDs for the high temperature.
14. Calculate the Temp Comp factor with the formula shown below.
TEMP
COMP
FACTOR
=
R Low Temperature -
R High Temperature
(R Reference High Temperature) - (R Reference Low Temperature)
The Temp Comp factor is not to exceed ±0.041.
15. If the Temp Comp factor is within tolerance, turn off the power to the instrument and stop the process media if needed. Disconnect the
DMM’s and the power supply from the instrument. Reconnect the sensing element wires to the control circuit socket and reinstall the
socket in the enclosure if it was previously removed. Do not pinch the wires between the socket and the enclosure.
16. Look up the resistance values to adjust potentiometers R5 and R8 in the Temp Comp Factor table (Table D-2). Follow the procedure in the
Restoring Temp Comp adjustment section using the values found in the table below.
17. If the calculated Temp Comp factor exceeds the allowable tolerance by a small amount (±0.01), using the maximum Temp Comp factor
may make the instrument perform satisfactorily. However, if the factor is out of tolerance by more than ±0.01 then it will be necessary to
repeat the calibration to verify the result. Continue with the adjustment procedure if the second result is within tolerance.
Figure D-1. Sensing Element Calibration Connections
Содержание FLT93B
Страница 10: ...GENERAL FLT Series FlexSwitchTM 4 Fluid Components International LLC INTENTIONALLY LEFT BLANK ...
Страница 20: ...INSTALLATION FLT Series FlexSwitchTM 14 Fluid Components International LLC Figure 2 7 Power Jumper Diagram ...
Страница 42: ...OPERATION FLT Series FlexSwitchTM 36 Fluid Components International LLC INTENTIONALLY LEFT BLANK ...
Страница 44: ...MAINTENANCE FLT Series FlexSwitchTM 38 Fluid Components International LLC INTENTIONALLY LEFT BLANK ...
Страница 50: ...TROUBLESHOOTING FLT Series FlexSwitchTM 44 Fluid Components International LLC INTENTIONALLY LEFT BLANK ...
Страница 80: ...APPENDIX A DRAWINGS FLT Series FlexSwitchTM 74 Fluid Components International LLC FLT93 PWB Module 5208 ...
Страница 82: ...APPENDIX B GLOSSARY FLT Series FlexSwitchTM 76 Fluid Components International LLC INTENTIONALLY LEFT BLANK ...
Страница 95: ...FLT Series FlexSwitchTM APPENDIX C APPROVAL INFORMATION Fluid Components International LLC 89 SIL Information ...
Страница 103: ...FLT Series FlexSwitchTM APPENDIX E CUSTOMER SERVICE Fluid Components International LLC 97 ...
Страница 104: ...APPENDIX E CUSTOMER SERVICE FLT Series FlexSwitchTM 98 Fluid Components International LLC ...