User manual

HD450-EU V1.3– 04/10

Operation

Meter Power

1. Press the Power button

to turn the meter ON or OFF

2. If the meter does not switch on when the power button is pressed or if the low battery

icon is displayed on the LCD, replace the battery.

Auto Power Off (APO)

1. The meter is equipped with an automatic power off (APO) feature that turns the meter

off after 20 minutes of inactivity. The

icon appears while APO is enabled.

2. To disable the APO feature, simultaneously press and release the RANGE/APO and

REC/SETUP buttons. Press and release again to re-activate the APO feature.

Unit of Measure

Press the UNITS button to change the unit of measure from Lux to Fc or from Fc to Lux

Range Selection

Press the RANGE button to select the measurement range. There are four (range)

selections for each unit of measure. The range icons will appear to identify the range

selected.

Taking a Measurement

1. Remove the sensor’s protective cap to expose the white sensor dome

2. Place the sensor in a horizontal position under the source of light to be measured

3. Read the light level on the LCD display (numerically or with the bargraph).

4. The meter will display ‘OL’ when the measurement is outside of the meter’s specified

range or if the meter is set to the wrong range. Change the range by pressing the

RANGE button to find the best range for the application.

5. Replace the protective sensor cap when the meter is not in use.

Data Hold

To freeze the LCD display, momentarily press the HOLD button. 'MANU HOLD' will appear

on the LCD. Momentarily press the HOLD button again to return to normal operation.

Peak Hold

The Peak Hold function allows the meter to capture short duration light flashes. The meter

can capture peaks down to 10mS in duration.

1. Press the PEAK button to activate the Peak Hold feature. “Manu” and “Pmax’’ will

appear on the display. Press the PEAK button again and “Manu” and “Pmin” will

appear. Use ‘Pmax’ to capture positive peaks. Use ‘Pmin’ to capture negative peaks.

2. When the peak has been captured, the value and associated time will remain in the

display until a higher peak is recorded. The bargraph display will remain active

displaying the current light level.

3. To exit the Peak Hold mode and return to the normal operating mode, press the

PEAK button a third time.