Fluid Components International FLT Series Rack Mount - Manual (Page 38)

Doc. No. 06EN003250 Rev. N/C 3 - 3 FLT  Series FlexSwitch  Rack Mount
CHAPTER 3 - OPERATION FLUID COMPONENTS INTL
Numerical Adjustment versus Adjustment by Observation
A set point is established using either numerical or empirical adjustment. The empirical adjustment requires the
customer to establish normal process operation and adjust the set point relative to this condition. The numerical
approach requires measuring normal and alarm process conditions with a voltmeter and setting up the instrument in
the calibrate mode based on these values. The empirical adjustment requires little time and one tool to establish the
set point. The numerical adjustment requires control of the process as well as additional time and tools to establish
the set point. Refer to Table 3-7 to determine which method is more appropriate for the application requirements.
Table 3-7. Numerical versus Observation Factors
Numerical Set Point Adjustment
The control circuit has two mutually exclusive alarms for each channel; they are identified as Alarm 1 and Alarm 2.
Each has a set point adjustment potentiometer and a LED indicator. Both alarms can be setup for one of three
applications: flow, level/interface, or temperature. The following application specific adjustment procedures are
generic and can be used for setting either or both alarms on each channel. Channel A will be used to explain the
setup procedures. The procedures to setup Channel B are the same steps except for the component designations.
Refer to Tables 3-1 through 3-6 and Figures 3-1 and 3-2.
Table 3-2A. Selectable Heater Wattage Control
Jumper CH A J7 J6 J5* J3* J4
Jumper CH B J33 J32 J31* J29* J30
FLT93-F Element
(560 Ohm Heater) 0.57
Watts
0.52
Watts
0.49
Watts
0.20
Watts
OFF
FLT93-S Element
(110 Ohm Heater) 3
Watts
1.75
Watts
0.75
Watts
0.27
Watts
OFF
Conditions
Channel A
Alarm 1
Red LED Channel A
Alarm 2
Green LED
Flow/Level
Switch
Temp. Switch
De-energized At
No Flow Or Dry De-energized When
Above Temperature
J22 J20
De-energized At
Flow Or Wet De-energized When
Below Temperature
J21 J19
Table 3-4. CH A Alarm Condition
*J5 and J31are standard for FLT93-S and
J3 and J29 are standard for FLT93-F.
Table 3-2B. Fixed Heater Wattage Control
Jumper CH A J5 J3 J4
Jumper CH B J31 J29 J30
FLT93-F Element
(560 Ohm Heater) Not
Applicable
0.20
Watts
OFF
FLT93-S Element
(110 Ohm Heater) 0.75
Watts
Not
Applicable
OFF
Table 3-3. Application
Flow/Level Temp.
Channel A, Alarm 1 J14 J16
Channel A, Alarm 2 J13 J15
Channel B, Alarm 1 J40 J42
Channel B, Alarm 2 J39 J41
Table 3-5. CH B Alarm Condition
Table 3-6. Relay Contact Configuration
Channel
A
1 Alarm J17 Alarm 2 Disabled
2 Alarms J18
Channel
B
1 Alarm J43 Alarm 2 Disabled
2 Alarms J44
Numerical Adjustment Observation Adjustment
Tools Needed
One small flat blade screwdriver. One DC
voltmeter (digital preferred) capable of
resolving to 0.001 volts on a 20 volt range.
One small flat blade screwdriver.
Estimated
Time
Required
The time required to establish the normal and
alarm process conditions, plus ten to twenty
minutes to make instrument adjustments. The time required to establish the normal
process condition, plus five to ten
minutes to make instrument adjustments.
Conditions
Channel B
Alarm 1
Red LED Channel B
Alarm 2
Green LED
Flow/Level
Switch
Temp. Switch
De-energized At
No Flow Or Dry De-energized When
Above Temperature
J48 J46
De-energized At
Flow Or Wet De-energized When
Below Temperature
J47 J45