Test Products International 556C1 - Manual (Page 5)

Operating Instructions
Air Velocity Measurement
1. Push Power button to meter on.
2. Pressing °C/°F button will toggle between °C and °F
3. Press VEL/FLOW button to display “VEL”
4. Press UNIT button to select the desired display units of air velocity.
5 units: “m/s”, “km/h”, “knots” , “ft/min”, “mile/h”
5. Position the probe at the desired location of measurement.
6. Read the velocity and temperature on the display.
7. Press the ESC/HOLD button to freeze the display after taking a
measurement is finished. “DH” will be displayed on the LCD.
8. Press the ESC/HOLD button again to return to normal operation.
9. If you want to record the reading changes, press the RECORD button
when the reading gets stable. The “REC” symbol will be displayed. The
meter will record the minimum, maximum and average readings.
10. To recall the data after recording, press the RECALL button.
The “MAX”, “MIN”, “AVG” values will be recalled sequentially.
11. If you press the RECORD button again, the unit will return to normal
operation mode.
Air Flow Measurement
1. Push the POWER button to turn meter on.
2. Pressing °C/°F button will toggle between °C and °F
3. Press VEL/FLOW button to display “FLOW”
4. Press UNIT button to select the desired units of airflow: “CFM or CMM”
5. In order to get a correct Air Flow reading it is required to input the
sample area. The area is either measured by ft 2 or m 2
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14. If you want to record the reading changes, press the RECORD button
when the reading gets stable. The “REC” symbol will be displayed. The
meter will record the minimum, maximum and average readings and
2/3V MAX.
15. “2/3V MAX” indicates 2/3 of the maximum value of the measured flow
reading.
16. To recall the data after recording, press the RECALL button.
The “MAX”, “MIN”, “AVG”, “2/3V MAX”values will be recalled
sequentially.
17. If you press the RECORD button again, the unit will return to normal
operation mode.
The 556 has auto power off feature
on normal mode operation (10 minutes)
Auto power off is disabled in record mode.
Battery should be replaced when
“LBT” is displayed at the top left of the screen.
Logger Functions
1. This function logs the reading to be measured during Air Velocity
and Air Flow measurements.
2. You can download the real-time data to be measured if you
connect the meter and the PC through RS-232.
3. Pressing the LOGGER button will display “Log” on the main
display and “on” on the sub display. Pressing the ENTER button
will activate this function.
4. This function transfers and also records data at real-time.
5. The meter records 1000 readings automatically. If there are more
than a 1000 readings the meter will stop automatically.
6. If the meter is turned off, measurements will be lost.