Amprobe LM631A Data sheet

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Data Sheet

LM631A

Digital Light Meter

This instrument is a portable, easy-to-use, 3-1⁄2-digit,
compact sized digital light meter designed for simple
one-hand operation reading in lux or fc units.

Pressing the PEAK button for more than 2 seconds turns
the backlight on and off.

There is also an auxiliary output at the microphone jack
(2.5 mm) connector that is active as long as the light
meter is turned on.

Measures wide range of light up to 20,000 fc or lux, front ■
panel switchable

Accurate, high resolution of 0.01 fc/lux

■

Sensor dome has 45˝ attached cord ■

Built-in CIE spectrum curve for accurate human eye response ■

Peak hold and data hold ■

Large, 3-1/2 digit display with backlight feature ■

Meets CE EN61326-1 certification for safety ratings ■

No hassle one year warranty ■

Included Accessories

Lens Cover, Batteries, Carrying Case and
Users Manual

(note: $500 MSLP limit)

Amprobe® Test Tools

www.Amprobe.com

LM631A Digital Light Meter

Data Sheet

General Specifications

Display: 31⁄ 2-digit (LCD) with maximum reading of 1999

Overrange: (OL) is displayed

Low Battery Indication: Change batteries immediately

Measurement Rate: 2.5 times per second, nominal

Operating Environment: 0 °C to 50 °C (32 °F to 122 °F) at < 75% R.H.

Storage Temperature: - 20 °C to 60 °C (- 4 °F to 140 °F), 0 to 80 % R.H. with batteries removed

Environment: Indoor use, altitude up to 2000 m

Battery: 4 pieces 1.5 V (A AA size) UM-4, R03

Battery Life: 200 hours carbon-zinc battery

Standby Current: <1 μA; Dimensions: 170 x 44 x 40 mm

Weight: 220 g

Warranty: One-year

Specifications (at 23°C±5°C, <75% R.H. non-condensing)

Function Range Accuracy

Visual Light Intensity

Ranges 20 lux, 200 lux, 2000 lux, 20000 lux

20 fc, 200 fc, 2000 fc, 20000 fc

Total Accuracy For CIE standard illuminant A (2856K): ± ( 3 % rdg + 10 digits)

Temperature Coefficient 0.1 x (specified accuracy)/°C (< 18 °C or > 28 °C),

0.056 x (specified accuracy)/°F (< 64.4 °F or > 82.4 °F)

Resolution 0.01 lux; 0.01 fc

Spectral Response CIE photopic – CIE standard illuminant A

Acceptance Angle ƒ ’ 2 < 2 %; cosine corrected (150 °)

Peak Hold Response Time >50 mS pulse light

Analog Output 1 mV = 1 lux or 10 mV = 1 fc, nominal, continuous output

The CIE photopic curve is an international standard for the color response of the average human eye. CIE standard illuminant as a is
defined as a gas-filled tungsten-filament lamp operating at a correlated color temperature.

Amprobe® Test Tools

website: www.Amprobe.com
email: [e-mail]
Everett, WA 98203
tel: 877-AMPROBE

Amprobe® Test Tools

Amprobe® Test Tools Europe

In den Engematten 14
79286 Glottertal, Germany
Tel.: [phone] - 0

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