Moore FCT [UB], Руководство пользователя

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FCT [UB]
The Interface Solution Experts
Figure 1.
Calibrating the FCT [UB]
Calibrating Zero and Span
Before beginning this procedure, check the model
number of the unit to be calibrated for the appropri-
ate input/output type and range, and the required
power input type.
The two pots on the front panel of the FCT [UB] are
labeled “ZERO” and “SPAN”. They are both 15-turn
potentiometers, equipped with slip clutch mecha-
nisms to prevent damage in the event of
overturning.
When calibrating the FCT [UB] zero and span, turn
the appropriate pot clockwise to increase the
setting, and counterclockwise to decrease the
setting.
To Calibrate Zero and Span:
1. Turn both pots fully counterclockwise (minimum
zero and span, 15 turns), then approximately 7
turns clockwise. This approximates mid-scale
for the pots.
2. Set the input source in the setup to 0% (zero
percent). 1V, for example, if the FCT [UB] being
calibrated is rated for 1-5V input.
3. Note the meter reading, and turn zero pot
clockwise to raise 0% output, or
counterclockwise to lower 0% output, until the
correct level is achieved.
4. Set the input source to 100% (full scale). 5V, for
example, if the FCT [UB] being calibrated is
rated for 1-5V input.
5. Note the meter reading, and turn span pot
clockwise to raise 100% output, or
counterclockwise to lower 100% output, until the
correct level is achieved.
6. Repeat steps 2 through 5 until output is stable at
both zero and 100 percent input.
SPAN ZERO
+
–
ADJUSTABLE
SIGNAL
SOURCE
(VOLTAGE OR
CURRENT)
+
–
VOLTAGE
OR
CURRENT
METER
+
–
VDC OR VAC
POWER
SOURCE
+IN
–IN
+OUT
–OUT
GND
PWR
PWR