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此款密度儀應(yīng)用了最新的技術(shù)和創(chuàng)新的方案，因而DR842是一款復(fù)合型密度儀，可以在非常有競(jìng)爭(zhēng)力的價(jià)格上達(dá)到從前無(wú)法得到的性能。
微控制器可以保證低能量消耗，每次充電可以測(cè)量超過(guò)20000次。
14位計(jì)算器可以保證異常精確的測(cè)量，密度讀數(shù)精確到小數(shù)點(diǎn)后三位，網(wǎng)點(diǎn)百分比讀數(shù)精確到小數(shù)點(diǎn)后一位。
光學(xué)系統(tǒng)符合ISO CD 14981 標(biāo)準(zhǔn)，使用9個(gè)LED光源（每色三個(gè)），完全去除了老一代密度儀由于濾色鏡和白熾燈快速老化而引起的典型問(wèn)題。
不管是通過(guò)已鑒定的校正片來(lái)校正還是使用密度儀的其他模式，DR842的校正過(guò)程都是非�？焖俸秃�(jiǎn)單的。

功能
1：在白紙上歸零（設(shè)定白場(chǎng)）
2：自動(dòng)顏色選擇
3：密度和密度差
4：灰平衡
5：網(wǎng)點(diǎn)面積百分比
6：自動(dòng)模式（同時(shí)測(cè)量密度和網(wǎng)點(diǎn)面積）

7：測(cè)量密度可精確到小數(shù)點(diǎn)后三位

技術(shù)規(guī)格
測(cè)量面積直徑： 3.5毫米
光譜響應(yīng)： E光譜（窄帶）或T光譜（寬帶）
測(cè)量范圍： 0-2.5D（密度）
                 0-100.0（網(wǎng)點(diǎn)面積百分比）
重復(fù)精度/線性度： ±0.010D（密度）
                           ±0.5（網(wǎng)點(diǎn)面積百分比）
不同儀器間精度： ±0.020D（密度）
顯示屏： LCD,兩行，每行8位
預(yù)熱時(shí)間： 不需預(yù)熱
操作溫度范圍： 5℃-40℃
每次充電可測(cè)： 20000次
電池： 鎳-鎘充電電池
重量： 360克
尺寸： 125*67*48毫米

標(biāo)準(zhǔn)配件：
包裝盒、充電器、校正卡
RS232數(shù)據(jù)線，操作手冊(cè)

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Mini densitometer using the latest technology and
extremely innovative solutions, resulting in performances
never before available in such a competitively priced and
compact instrument.
The micro-controller ensures a low energy consumption
to give more than 20.000 measurements per charge.
The converter with 14 BITS produces measurements of
exceptional precision and repeatability - density readings
up to 3 decimal points and dot percentage readings to 1
decimal point.
The optical system meets the ISO CD 14981 standard
using a light source of 9 LEDS (3 of each colour),
completely eliminating problems caused by the rapid
ageing of the filters and of incandescent lamps, typical of
densitometers of the past generation.
The calibration procedure for the DR842 is very quick
and simple, either calibrating on a certified reference tablet
or on other models of densitometers.
FUNCTIONS
􀂾 Zeroing on the white paper.
􀂾 Auto colour select.
􀂾 Density and difference of density.
􀂾 Grey balance.
􀂾 Percent dot area.
􀂾 Automatic.
􀂾 Possibility to display 3 decimal points for
measurements in density.
SPECIFICATIONS
Measuring area diameter: 3,5 mm. (on request 2
mm.)
Spectral response: equivalent to status E
(narrow band) or to status
T (wide band)
Measuring range: 0 - 2,5 D (density)
0 - 100,0 (percent dot
area)
Repeatability, linearity: ± 0,010 D (density)
± 0,5 (percent dot area)
Interinstrument agreement: ± 0,020 D (density)
Display: LCD, 2 lines of 8
characters
Warm-up time: none
Operating temperature range: 5°C - 40°C
Battery: rechargeable NiCd
Measurements per charge: 20.000
Weight: 360 gr.
Dimensions: 125 x 67 x 48 mm.
STANDARD ACCESSORIES
Carrying case, AC adapter-charger, calibration tablet, RS232
serial interface, operation manual.
OPTIONS
Polarising filter.
AVAILABLE MODELS
DR842 E
narrow band spectral response without polarising filter.
DR842 EP
narrow band spectral response with polarising filter.
DR842 T
wide band spectral response without polarising filter.
DR842 TP
wide band spectral response with polarising filter.