UV flash meter with RS232 output series B501

Description:

The light meter measures UV flashes.  The results of these measurements are sent to a PC.  The letters shown on the screen are the following for the measured values:

       123

 - in 2msec increments, until the curve is complete (see figure below) (max 9.99 mW/cm²)    

User Instructions:

1.  Using DOS, follow old well known rules.

2.  Using Windows:  use the hyper terminal.

     Start > Programs > Accessories > Communication > Hyper Terminal

     Click on hyperterminal.exe and then make a new connection with any name

     Use the following information:  Direct to com-1.  9600 bd, 8 bits, no parity, stop bit 1, flow control Xon/Xoff.

     On the hyper terminal, go to 'File > Properties > Settings > ASCII'

Connect your port with the senor via a RS232 cable, click OK, sensor responds immediately as follows:

     123 (thou in 2 msec increments)

3.  This can be done using any professional programs like WinWdege, WonderWare, Labview, Daisy etc...

4.  Using USB to RS232 to USB connections are available on the market.  

     Connect +5 Volts from USB into pin No. 9 in RS 232.

User Instructions for PALM models 125, 130, 500, 505, 515, 705

1.  Install the freeware program PALM TELNET (PTELNET)

     -this program is available at http://netpage.em.com.br/mmand/ptelnet.htm

2.  Follow instructions for the RS 232.

Calibration:

Hohner calibrates the values to microwatt / square cm.  To recalibrate simply use a calibration light or calibrate to any value . You always can use the values from the sensor as default. You can calculate the new values or put the formula in your Palm software. 

Figure 1:  Spectral Intensity of UV and visible light calibrated to 100 milli watt / square cm for max output.

Figure 2:  Same as figure 1 with the addition of a typical light bulb and its output.

Example to show total light energy (figure 1):

A halogen light with 3000 Lx is shown into the sensors aperture and the following calculations are done:

     a) total energy:  convert 3000 Lx to Watts  -  0.0015 × 3000 W = 5 Watts

     b) This energy has to be seen in a sphere of 1 meter radius, the surface area is 12.5 cm²

     c) The sensors aperture is 10 mm²

     d) The light energy going in to the sensor in one meter is: (5 watts × 10 mm²) ÷ (10 cm²) = 5 micro Watts

Example to show light measured with a sensor (figure 2):

The total amount of the energy of the light bulb includes a part of the infrared light.  Light energy seen over the spectra is measured in the light sensor.  Light energy for each color is the following:

The integral from the sensitivity of the sensor in its spectra x part of the light energy from the spectra going in the sensor.  In this example the sensor shows the following outputs:

     a) 1.33 micro Watt / cm²