The Gigahertz-Optik P-9710-2 meter used with the VL-3701 detector head can be used for the precise illuminance measurements in Lux. However, its potential is enhanced using an SRT-M37-L series front lens adapter so as to measure the luminance in cd/m². Since measurement field focusing is hereby not possible, this combination is applicable for measurements in applications such as such as light boxes.
Instrument Hire models are supplied with VL-3701 detector head as standard ~ Illuminance Class A detector head (Lux) and the SRT-M37L-2 (2o) series front lens adapters to measure the luminance in cd/m². The hire models are not supplied with any software or cables for download to PC and data recorded via the logging facility.
VL-3701 detector head
- Photometric responsivity
- DIN Class A parameters
- Calibrated with broadband source at 2956 K
- Cosine corrected field of view
- Typical. Responsivity 0.5 nA/lx
- 37 mm dia. x 20 mm high housing
- 2 m coaxial cable
SRT-M37-L series front lens adapter (2 degree field-of-view)
- Typical response : 5 pA/(cd/m²)
All Hire models come pre assembled but if the unit is taken apart simply fix the SRT-M37L lens adapter onto the VL-3701 measurement head using the SRT-M45/37 adapter. This is attached onto the measurement head using side screws. For secure fitting, the lock screws fix into the V-nut on the measurement head. The lens adapter can then be simply screwed in. The SRT-M45/37B adapter has an M6 and a (1/4”-20 BSW) tripod screw on the side for mounting to tripods and others.
For a detailed technical specification please refer to the instrument manual.
Important notes :
All Instrument Solutions Hire models are supplied with a an illuminance (Lux) calibration conducted prior to each rental and a copy of the manufacturers calibration at the time of manufacture for the P-9710-2 meter with VL-3701 Illuminance head and SRT-M37-L luminance lens adapter.
The P9710-2 meter is an equivalent to the P9710-1 model except it has a fixed aplifier slew rate of 20 ms in all eight gain levels. Thus light pulses shorter than 1 ns are stretched to 20 ms. The pulse energy of the stretched pulse can then be measured precisely with the 100 µs sample rate of the optometer.