Traceable 3251 User manual

SPECIFICATIONS
Ranges--
Lux: 0 to 1999
2000 to 19,990
20,000 to 50,000
Foot Candles: 0 to 199.9
200 to 1999
2000 to 5000
Resolution--
Lux: 1 (0 to 1999)
10 (2000 to 19,990)
100 (20,000 to 50,000)
Foot Candles: 0.1 (0 to 199.9)
1 (200 to 1999)
10 (2000 to 5000)
Accuracy--
Lux: ±5% reading + 10
±5% reading + 100
±5% reading + 1000
Foot Candles:
±5% reading + 1
±5% reading + 10
±5% reading + 100
OPERATION
1. Choose LUX or Foot Candles and Slow
or Fast Response by sliding the
LUX/FC switch and RESPONSE TIME
switch to the desired range and
response time.
“Fast” (black letters)--
Lux range/Fast response.
“Slow” (black letters)--
Lux range/Slow response.
“Fast” (blue letters)--
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Foot Candles range/Fast response.
“Slow” (blue letters)--
Foot Candles range/Slow response.
2. Turn the meter on by sliding the
POWER OFF/RANGE switch from the
OFF position to the desired range.
To ensure the most accurate reading,
make certain that the meter is set to the
correct range:
If the light source is less than 2000 Lux or
200 Fc, slide the POWER OFF/RANGE
switch to the 0-1999 Lux/ 0-199.9 Fc
position.
If the light source is more than 2000 Lux
or 200 Fc, but less than 20,000 Lux or
2000 Fc, slide the switch to the 2000-
19990 Lux/200-1999 Fc position.
If the light source is over 20,000 Lux or
2000 Fc, slide the switch to the 20,000-
50,000 Lux/2000-5000 Fc position.
3. Place the light sensor directly under
the light source to be measured. Hold
for at least 0.4 seconds. The meter will
measure the light and display the value.
4. To hold a measurement on the display,
slide the DATA HOLD switch to the
right while a measurement is being
taken. To cancel the data hold feature,
simply slide the DATA HOLD switch to
the left.
5. Once measurements are completed,
slide the POWER OFF/RANGE switch
to the “OFF” position to preserve
battery life.
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NOTE: This light meter is calibrated using
a tungsten light source. If measuring
another type of light source, the reading
displayed on the meter will have to be cor-
rected using the following factors:
Mercury - (reading x 1.05)
Fluorescent - (reading x 0.91)
Daylight - (reading x 0.95)
BATTERY REPLACEMENT
“LO BAT” appearing on the display,
indicates the battery is low and needs to
be replaced. To replace the battery, slide
the battery cover located on the back of
the unit away from the unit. Remove the
old battery and replace it with a new
9-Volt alkaline battery. Properly connect
the battery. Replace the battery cover.
Incorrectly installed batteries may dam-
age electronics.
ALL OPERATIONAL DIFFICULTIES
If this unit does not function properly for
any reason, replace the batteries with
new high-quality batteries (see “Battery
Replacement” section). Low battery power
can occasionally cause any number of
“apparent” operational difculties. Replac-
ing the batteries with new fresh batteries
will solve most difculties.
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Control Company. 92-3251-20 Rev. 2 061516
TRACEABLE
DUAL-RANGE
LIGHT METER
INSTRUCTIONS
®
Traceable®is a registered trademark of Control Company.
CONTROL COMPANY
Control Company is ISO 9001:2008 Quality-Certied
by DNV and ISO/IEC 17025:2005 accredited as a
Calibration Laboratory by A2LA.
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