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2. INTRODUCTION
2.1 Inspection
Examine the shipping carton for any sign of damage. Inspect the unit
and any accessories for damage. If there is any damage then consult
your distributor immediately.
2.2 Description
The Martindale LM82 has the following functions and features:
Light intensity measurement to 200k lux, 18580 fc
Spectral response: CIE photopic
Hold, Max, Min, Max-Min and Average functions
Auto power off
Low battery indication
LCD display with backlight
Pocket-sized, compact body
2.3 Accessories
The LM82 comes with the following accessories:
2 x 1.5V AAA batteries
Protective cover for safe storage
Detachable carry strap
Instructions
2.4 Battery Installation
Refer to Section 4.1 (Battery Replacement) for the battery installation
instructions for the LM82.
3.4 Power On/Off
To power on in Measurement mode, press
second.
To power on in Set mode, press
To power off the unit, press
for 2 seconds.
3.5 Auto Power Off (APO)
If the unit is inactive for a period of 10 minutes it will automatically
power off.
To disable this function refer to section 3.7.
3.6 Backlight
Press
for less than 1 second to turn on the backlight.
It will automatically turn off after 15 seconds if there is no further
operation of the unit.
3.7 Set Mode
This mode sets Auto power off (APO).
The Set mode is selected by pressing
unit powered off.
If the unit is switched off while in the Set mode, the changed setting
will not be saved, and the unit will revert to the previous settings.
The LCD will display APO and the current setting will fl ash after
entering the Set mode.
Press
to select ON or OFF as required.
MODE
Press
to save the setting and return to the Measurement
mode.
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LM82 instructions rev1.indd 5
for less than 1
for 2 seconds.
for 2 seconds with the
3. OPERATION
3.1 Low Battery Indication
If the
s displayed, the battery needs replacing as measurement
i
accuracy can no longer be guaranteed (see section 4.1 Battery
Replacement).
3.2 Description of Press Buttons
Selects APO setting and lux or fc
Turns on/off the LM82, turns on backlight
Selects Set mode and Hold mode functions
MODE
3.3 Description of LCD symbols
APO
Auto power off is active
Indicates low batteries
HOLD
Hold mode is active
MAX
Maximum recorded reading is displayed
MIN
Minimum recorded reading is displayed
The difference between maximum and minimum
MAX-MIN
recorded readings is displayed
AVG
The average of recorded readings is displayed
fc lux
Units of measurement being displayed
Indicates press of
ENTER
3
4
Indicates press of
3.8 Measurement Mode
Referring to section 3.10, hold the LM92 so the light sensor is directed
toward the light source.
Press
to select lux or fc as required.
Read the measured light intensity from the display.
While in Measurement mode, all measured values are recorded at a
rate of once per second for use by the Hold mode (See section 3.9).
3.9 Hold Mode
The LM82 has the facility to display the maximum reading, the
minimum reading, the difference between maximum and minimum
readings and the average of the recorded readings.
To enter the Hold mode press
The LCD will display HOLD and the last measured value will be held
on the display.
Successive presses of the
sequence:
HOLD MAX - maximum recorded reading;
HOLD MIN - minimum recorded reading;
HOLD MAX-MIN - difference between max and min recorded
readings;
HOLD AVG - average of the recorded readings.
The unit will return to the Measurement mode at the end of the above
sequence.
To clear the recorded readings, press
point in the above sequence. The unit will return to the Measurement
mode.
5
6
button required
MODE
button required
MODE
while in Measurement mode.
MODE
button will display the following in
MODE
for 2 seconds at any
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