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Grafikon Colour Analyser
Hi, Does anyone have any information regarding a Grafikon Colour Analyser.
There is no model number on the case, but there are two analogue meters on the front panel, measuring R and B wrt Green. There are two thumbwheel decade switches (trims for r and g), and three press buttons for Lum, H/L and times 3 gain. The unit seems to basically work, but if anyone has any information, circuit diagram or alignment information, that would be most helpful. Even the operating instructions would be a start. Thanks in advance. Trevor. |
Grafikon will not give out any schematics, or technical service
information for this meter. To calibrate it, you would require the proper calibration filter groups, reflection references, and light source. It is a fairly complicated arrangement to calibrate a colour meter. If you are using the meter in-house as a reference tool for colour repeatability, and not using it to reference your products to facilities outside, the calibration would not be critical in this case. If you are going to reference your product to other facilities using colour standards, that are using their own colour meters, then calibration will be a very strong issue. -- Jerry G. ====== "Trevor Brown" wrote in message ... Hi, Does anyone have any information regarding a Grafikon Colour Analyser. There is no model number on the case, but there are two analogue meters on the front panel, measuring R and B wrt Green. There are two thumbwheel decade switches (trims for r and g), and three press buttons for Lum, H/L and times 3 gain. The unit seems to basically work, but if anyone has any information, circuit diagram or alignment information, that would be most helpful. Even the operating instructions would be a start. Thanks in advance. Trevor. |
On Tue, 19 Oct 2004 01:31:51 +0100, "Trevor Brown"
wrote: Hi, Does anyone have any information regarding a Grafikon Colour Analyser. There is no model number on the case, but there are two analogue meters on the front panel, measuring R and B wrt Green. There are two thumbwheel decade switches (trims for r and g), and three press buttons for Lum, H/L and times 3 gain. The unit seems to basically work, but if anyone has any information, circuit diagram or alignment information, that would be most helpful. Even the operating instructions would be a start. Thanks in advance. Trevor. Can'tr remember ever seeing one with that brand name in my three and a half decades in commercial photography. Sounds like it's a analyser for color printing? Additive as well. Any way you could post a image of it? I've used just about every analyser ever made at one time or another and would recognise who actually made it.(sounds to me very much like one made by Phillips back in the early 80's. It was marketed under several different names.) The high/low would be for exposure(f-stop adjustment. The times three gain would be for dense negatives perhaps? I guessing the Luminance would be for filtration? On the phillips a diffuser was used on the enlarger to give an AWB for filter settings for subtrative head enlargers(YMC) On the tricolor additive enlargers this unit was designed for the enlarger head had RGB filter wheels and there was a process of reading each filter and with the analyser(matching filter wheel built into the spot reader with complemetary filters you'd adjust the duration on the enlarger timer for each filter(RGB). Post a pic or two of your unit and I'll look it up and see if I can get you the manual.(post the info on the manufacturers label or sticker as well. Should be on the back or bottom of the unit.) |
This isn't a photographic analyser, hence rgb not myc. It's for adjusting
the grey scale tracking of television monitors,and is definitely made by Grafikon. (it's a uk based company that mainly dealt with broadcast tv equipment). Thanks to everybody that's replied so far. Trevor. "none" wrote in message ... On Tue, 19 Oct 2004 01:31:51 +0100, "Trevor Brown" wrote: Hi, Does anyone have any information regarding a Grafikon Colour Analyser. There is no model number on the case, but there are two analogue meters on the front panel, measuring R and B wrt Green. There are two thumbwheel decade switches (trims for r and g), and three press buttons for Lum, H/L and times 3 gain. The unit seems to basically work, but if anyone has any information, circuit diagram or alignment information, that would be most helpful. Even the operating instructions would be a start. Thanks in advance. Trevor. Can'tr remember ever seeing one with that brand name in my three and a half decades in commercial photography. Sounds like it's a analyser for color printing? Additive as well. Any way you could post a image of it? I've used just about every analyser ever made at one time or another and would recognise who actually made it.(sounds to me very much like one made by Phillips back in the early 80's. It was marketed under several different names.) The high/low would be for exposure(f-stop adjustment. The times three gain would be for dense negatives perhaps? I guessing the Luminance would be for filtration? On the phillips a diffuser was used on the enlarger to give an AWB for filter settings for subtrative head enlargers(YMC) On the tricolor additive enlargers this unit was designed for the enlarger head had RGB filter wheels and there was a process of reading each filter and with the analyser(matching filter wheel built into the spot reader with complemetary filters you'd adjust the duration on the enlarger timer for each filter(RGB). Post a pic or two of your unit and I'll look it up and see if I can get you the manual.(post the info on the manufacturers label or sticker as well. Should be on the back or bottom of the unit.) |
This isn't a photographic analyser, hence rgb not myc. It's for adjusting
the grey scale tracking of television monitors,and is definitely made by Grafikon. (it's a uk based company that mainly dealt with broadcast tv equipment). Thanks to everybody that's replied so far. I'm sure you are correct about your device...but don't jump to conclusions about RGB versus YCM. I spent years using (US) Greylab RGB densitometer to control the chemistry in reversal motion picture film processing machines. There was an interchangeable filter head for YCM so the same machine could be used for negative processing. p a w e b e r 0 2 @ a o l . c o m webpa |
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Yeah, same as most, sticky suction pad to crt, r,g and b filtered
photocells. Ciruit looks simple enough, just a hell of a lot of pots! "none" wrote in message ... On 21 Oct 2004 23:05:03 GMT, (WEBPA) wrote: This isn't a photographic analyser, hence rgb not myc. It's for adjusting the grey scale tracking of television monitors,and is definitely made by Grafikon. (it's a uk based company that mainly dealt with broadcast tv equipment). Thanks to everybody that's replied so far. I'm sure you are correct about your device...but don't jump to conclusions about RGB versus YCM. I spent years using (US) Greylab RGB densitometer to control the chemistry in reversal motion picture film processing machines. There was an interchangeable filter head for YCM so the same machine could be used for negative processing. p a w e b e r 0 2 @ a o l . c o m webpa You can use either RGB or YMC heads, it's just a matter of knowing your complimentaries and adjusting the dichros accordingly. As for the Graficon the OP is talking about. Is it the type of analyser that uses a photocell probe that reads directly off the crt screens? |
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