Chapter 4 User Interface; Operation - Ametek 303B User Manual

OPERATION

Control
BYPASS flow meter
SAMPLE flow meter
Moisture display
SAMPLE ADJUST
BYPASS ADJUST
ANALOG RANGE
keys and LED's
+ key
– key
DISPLAY LIGHT key
ALARM key and LED
STANDBY key
and LED
ELEC TEST key and LED
CELL TEST key and LED
AC POWER LED
POWER key and LED
ofst key
gain key
USER INTERFACE
Controls and Indictors
Function
Sets and reads bypass gas flow rate.
Reads sample flow rate.
Liquid crystal display (LCD) shows moisture
value or other data depending on mode.
Screwdriver adjustment for sample flow
rate.
Screwdriver adjustment for reference
flow rate.
Keys enable selection of one of four 4 to
20-mA output ranges. LED indicates which
range is active
Plus key increments value selections for
gain, offset, factory gain, and alarm
set-point entries.
Minus key decrements value selections
for gain, offset, factory gain, and alarm
setpoint entries.
Back lights the display for about 1 minute
Enables alarm setpoint adjustment with
+ and – keys.
Places the unit in a standby mode by
reducing power consumption.
Tests 5V power supply.
Tests cell 50V power supply.
ON when the unit is plugged into ac out-let.
Turns instrument power ON and OFF.
Enables changing offset parameter when
key is pressed at power-up (refer to Para-
meter Setting in Section 4).
Enables changing gain parameter when
key is pressed at power-up (refer to Pa-
rameter Setting in Section 4).
Normal Measuring
100 cc/min at 1 atm
Moisture reading
As needed for SAMPLE
flow meter reading
As needed for BYPASS
flow meter reading
One of the four LED
must always be ON
Not applicable
Not applicable
As needed
LED ON if moisture
reading is above alarm
setpoint.
Not applicable
Not applicable
Not applicable
ON (if on ac power)
ON
Not applicable
Not applicable
Operating Procedure (Checklist)
User Interface
Mid-scale.
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