Konica Minolta T-10 Illuminance Photometer

An affordable, portable & simple-to-use "lux" meter

The T-10 from Konica Minolta is an affordable, portable photometer for measuring the illuminance of light sources in lux (or foot candles, where 1 fcd = 1 lumen per square foot = 10.764 lux). Don't confuse affordability with low specification, though. Unlike many other inexpensive lux meters, the T-10 is equipped with advanced features which promote measurement accuracy and ease of use. The spectral response of the T-10's silicon photodiode is matched to within 8% of the CIE standard observer function for photopic vision using special filters, while a cosine diffuser ensures that the effective illuminance from off-axis sources is scaled correctly. The T-10 provides measurements over 5 decades, from 0.01 to 299,900 lux. In nature, illuminance typically ranges from about 0.01 lux on a dark night of a new moon to about 100,000 lux on a hot summer day. Workplace illumination is normally around 1000 lux.

Flexible & Convenient

The T-10 conveniently allows you to separate the sensor head from the main body of the meter. This allows you to hold the sensor towards the light source whilst standing to one side and reading the light level. To use the T-10 in this way, you will need to order a couple of optional accessories (T-A20 receptor unit for the main body and the T-A21 receptor unit for the sensor head with 1m LAN cable). If you need to measure illuminance and access is restricted, the T-10M is for you. Essentially similar to the regular T-10, the T-10M employs a compact (14mm diameter) sensor head connected to the T-10 main body via a 1m cable.

Many Advanced Features

Basic operation of the T-10 gives you readings of the illuminance in lux (or you can select foot candles if you prefer), as well as the illuminance difference and illuminance ratio. You can also measure the illuminance integrated over time and the average illuminance. Advanced operation allows you to set a reference reading and enter colour correction factors specific to the type of light source under test.

The T-10 features as standard an RS232 serial interface (software is optional) and an analogue output (subminiature jack plug included) to log the measured illuminance to a recording device. Zero adjustment is automatic, while you can either leave the meter to set its own range automatically or choose your preferred range manually. The LCD display features a backlight that turns on automatically under low ambient illumination. The T-10 operates as standard from AA-size batteries, while an AC mains adaptor is available as an accessory.

Specifications & Ordering Information

Model	T-10	T-10M
Meter Type	Standard sensor	Mini sensor

Sensor	Silicon photodiode
Spectral Response	Photopic - CIE V(l)
F₁' (Spectral Mismatch to CIE)	Within 8%
Cosine Correction	±1% @ 10°; ±2% @ 30°; ±6% @ 50°; ±7% @ 60°; ±25% @ 80°
Measurement Units	lux (lx) & foot candles (fc)
Measurement Functions	Illuminance, illuminance difference, illuminance ratio, integrated illuminance, integration time, mean illuminance
Dynamic Range	5 decades, automatic or manual selection
Measurement Range	0.01 to 299,900 lx (0.001 to 29,990 fc)
Accuracy	± 2% ± 1 digit (ref. illuminant A)
User Calibration Function	CCF (Colour Correction Function)
Temperature/Humidity Drift	± 3% ± 1 digit of displayed value at 20°C
Digital Output	RS-232C serial port
Analogue Output	0-3V
Display	Backlit LCD with 3 or 4 significant digits
Operating Temperature/Humidity	-10 to 40°C, relative humidity < 85% (35°C), non-condensing
Storage Temperature/Humidity	-20 to 55°C, relative humidity < 85% (35°C), non-condensing
Power	Internal AA alkaline batteries (x2) AC mains adaptor (optional)
Battery Life	> 72 hours
Dimensions	69 x 174 x 35mm	Meter: 69 x 161.5 x 30mm Sensor: Ø16.5 x 12.5mm Cord length: 1m
Weight (without batteries)	200g	205g
Accessories Included
	T-10 main body
	T-10 sensor head	-
	-	T-10M sensor head
	Sensor head cap	-
	Sub-miniature jack plug
	Soft case (T-A10)
	Neck strap
	Batteries
Optional Accessories
	Calibration certificate
	AC mains adaptor (AC-A308)
	Serial interface cable (T-A11)
	Printer cable (T-A12)
	Adaptor unit for main body (T-A20)	-
	Adaptor unit for sensor head (T-A21)	-
	Hard case (CL-A10)
	Software (T-A30) - includes T-A11 cable