Nānā Kaiapuni
Special Order Item: Typically ships in 1-2 weeks.
This single environmental instrument measures the four parameters that cause most damage to buildings, valuable objects, documents, etc: ultraviolet and visible light, humidity and temperature.
ka 765 measures and displays visible light (Lux or Foot-candles), UV light (mW/M² or µW/lumen), temperature (°C or °F) and humidity (%RH). This is the world standard instrument for museums, art galleries conservators or any application requiring a controlled environment.
ka 765C (with data logging) is the same as 765 with data logging capacity for over 70,000 readings of all 4 parameters. No special software is required, logged information is stored on an internal USB Flash disc and the data can be downloaded onto a PC and viewed with any spreadsheet (Excel etc). A free application (RView) is also available for download that displays the data as a zoomable graph that can be saved as an image for inclusion in documents and/or printed.
For many years it has been recognized that one of the major causes of damage to museum objects and other antiquities is the fading and rotting effect of light on the object. The most damaging part of the illumination is its ultraviolet (UV) content.
Since 1976 Littlemore Scientific (ELSEC) has been providing instruments that enable the conservator to measure the UV content of light and thereby protect valuable exhibits. Using the 765, measurements can be taken of the proportion of UV present (mW/lumen), the total amount of UV (mW/M²), the amount of visible light present as Lux or Foot-candles. Temperature can be measured in °C or °F, humidity is shown as % Relative Humidity (%RH) and dew point. The displayed units can easily be changed by the user.
Min/max values and their time of measurement are displayed for each parameter.
Anyone can take measurements straight out of the box with little, if any, reference to the instruction manual. The appropriate button is pushed depending on the measurement required and the reading is taken. The unit automatically turns off 10 seconds after the last reading unless a button is held down for over 5 seconds, this causes continuous measurements to be taken until another button is pressed. The large 8 line display enables an easy to use menu system to select the more advanced functions, change units etc.
Units of measurement for UV
Traditionally UV has been measured in museums as the proportion of ultraviolet present. This result is useful for checking a particular lamp or window because the proportion of UV does not change with the distance from the light source. Using a simple rule, the amount of UV on an object can be limited (it is usual to arrange that the proportion of UV should not exceed 75mW/lumen in museums). The actual amount of damage done is determined by the total amount of UV falling on the object, so it is useful to be able to measure this directly, especially if non standard amounts of illumination are required. The amount of UV should be as little as possible but in general should not exceed 20mW/M².
A Lux readout is provided to control illumination and limit damage done by visible light. Normal museum light levels should be limited to 150-250 Lux.
Dimensions: 5.9" x 2.5" x 1" (150 x 65 x 25 mm) including RH/Temperature probe
Weight: 5.6 oz (165 g) with batteries.
hoakaka
| Visible Wavelength Range: | 400 to 700 nM (CIE response). No correction required for different light sources. |
| Visible Power Range: | 0.1 to 200,000 Lux (0.1 to 20,000 Foot-candles) |
| UV Wavelength Range: | 300 a 400 nm |
| UV Power Range: | 2 to 50,000 mW / sqm |
| UV Proportion Range: | 8 to 10,000 mW / Lumen |
| RH mīkiniʻimi: | Capacitive film type |
| RH: | 0 i ka 100% RH |
| E hōʻike he Resolution: |
hanohano: 0.1 up to 100 then 1 Foot-candles: 0.1 up to 100 then 1 UV: 0.1 up to 100 then 1 Proportion of UV: 1 mW / Lumen Mahana: 0.1 ° C a i ʻole ° F HR: 0.1 |
| pololei: |
Light and UV: 5% ± 1 displayed digit Mahana: ± 0.5 ° C (± 0.9 ° F) HR: ± 2.5% |
|
Angular Response: (Light & UV) |
ʻEhina |
| Heluhelu: | 8 line graphical Liquid Crystal Display with automatic backlight |
|
Data Logging Time Intervals: (Time Till Full) |
10 seconds (30 hours), 1 minute (7½ days), 10 minutes (75 days), 1 hour (454 days) |
| Data Logging Storage Capacity: | 10,900 readings of all 4 parameters |
| Storage Resolution for Logged Data: |
Light & UV: 0.1% of saved value Mahana: 0.5 ° C humidity: 0.5% RH |
| Nānaina kamepiula: | IrDA compatible wireless infrared link. |
| Hana lā: | Display as day-month-year or month-day-year. |
| Nā Pākuhi: | 2 alkaline AA type |
| Ola ola: | Approx. 100 hours continuous use or 12,000 readings taking 30 seconds each. Battery life will be less if the display backlight is used |
|
Nā ʻĀina Kūʻokoʻa: Unless specifically requested, the meter does NOT include a connection for an external supply. |
4.0 to 5.2V DC, 100 mA A suitable mains power supply can be provided as an optional extra (please specify mains voltage required). |
| Ke Kahua Hana: | 32 a 122 ° F 0 a 50 ° C |
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Tech Instrumentation Inc.
750 E Kiowa Ave.
PO Box 2029
Elizabeth, CO 80107-2029
USA
Kelepona: [800) 390-0004 Ka uku ʻole
Phone: (303) 841-7567
Kelepaʻi: (303) 840-8568
MANAʻO: ʻAʻole mākou e ʻae i nā hoʻolaha i noi ʻole ʻia ma ka helu facsimile.
Email: [email protected]
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Kulekele pilikino
ʻAʻole e hōʻike ʻo Tech Instrumentation i ka ʻike o nā mea kūʻai aku i nā ʻaoʻao ʻē aʻe ma mua o ka wā e hoʻokō ʻia ai nā kikoʻī kauoha ma ke ʻano o ka hoʻokō kauoha. Hoʻohana ʻia nā kuki ma kēia kahua kūʻai no ka mālama ʻana i nā mea o kāu kaʻa kūʻai, e mālama i nā helu hoʻouna inā hoʻohana ʻia ka puke helu wahi a e mālama i kāu kikoʻī inā koho ʻoe i ke koho 'Hoʻomanaʻo iaʻu'. Hoʻohana ʻia lākou ma hope o kou komo ʻana ma ke ʻano o ia kaʻina hana. Hiki iā ʻoe ke hoʻopau i nā kuki ma kāu polokalamu kele pūnaewele ma ka hele ʻana i 'Tools | Koho Pūnaewele | Palekana' a me ke koho ʻana e ālai i nā kuki. Inā hoʻopau ʻoe i nā kuki, ʻaʻole hiki iā ʻoe ke kau i nā kauoha a i ʻole ka pōmaikaʻi mai nā hiʻohiʻona ʻē aʻe e hoʻohana ana i nā kuki.
hoʻi Policy
Lawe ka mea kūʻai i ke kuleana piha i ka hoʻoholo ʻana i ke kūpono o kēia mau mea no nā mea kūʻai i manaʻo e hoʻohana. ʻO ka hapa nui o nā mea i hele mai me ka liʻiliʻi o hoʻokahi makahiki palapala hōʻoia no nā hemahema o ka hana ʻana.
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Hiki ke hoʻihoʻi ʻia nā mea hou a wehe ʻole ʻia e Tech Instrumentation.com i loko o 30 mau lā o ka lawe ʻana. Pono nā mea āpau i ka ʻae ʻia mai Tech Instrumentation ma mua o ka hiki ke hoʻihoʻi ʻia. E uku nō hoʻi mākou i nā kumukūʻai hoʻihoʻi inā ʻo ka hoʻihoʻi ʻana ma muli o kā mākou hewa (e laʻa, ua loaʻa iā ʻoe kahi mea hewa a i ʻole ka hemahema). Hoʻihoʻi ʻia nā mea hou a wehe ʻole ʻia ma muli o ka hewa o ka mea kūʻai aku i ke kauoha ʻana a i ʻole ka lawelawe ʻana e kau ʻia i ka uku hoʻihoʻi o 30% a pono e hoʻihoʻi ʻia ka ukana i uku mua ʻia.
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Hōʻole ʻia/hiki ʻole ke hoʻouna ʻia: E hoʻihoʻi mākou i ka liʻiliʻi o 75% o ke kumukūʻai o ka huahana me ka liʻiliʻi o nā kumukūʻai hoʻouna (ʻo nā ala ʻelua) no nā hoʻouna i hoʻihoʻi ʻia mai iā mākou e like me ka hōʻole ʻana a ʻaʻole hiki ke hoʻouna ʻia. Pono nā uku lawelawe (hoʻoponopono, hōʻoia a me nā mea ʻē aʻe) akā ʻaʻole e hoʻihoʻi ʻia. Ua ʻae ka mea kūʻai aku e uku i nā uku hoʻihoʻi āpau a me nā koina pili i loaʻa iā mākou i ka wā i hoʻomaka ʻia ai kahi hoʻihoʻi kāleka hōʻaiʻē e ka mea kūʻai aku no ka hōʻole ʻana i nā hoʻouna. E ʻoluʻolu e kelepona pololei iā mākou a e hoʻihoʻi mākou i kā mākou kulekele. ʻAʻole hiki ke hoʻihoʻi ʻia nā uku o ka hoʻouna ʻana a me ka lawelawe ʻana koe wale nō inā he hewa i kā mākou ʻaoʻao.