1
Introduction
Specifications
8
Accela PDA Detector Hardware Manual
Thermo Scientific
Specifications
The specifications for the Accela PDA Detector are as follows:
Wavelength range:
190 nm to 800 nm continuous
Wavelength accuracy:
±
1 nm at 254 nm and 656 nm
Digital wavelength resolution: 1.2 nm
Absorbance range:
2.0 AU to +4.0 AU, 20-bit resolution
Short-term noise
*
:
*
According to ASTM E1657-98 “Standard Practice for Testing Variable-Wavelength Photometric Detectors Used in Liquid Chromatography”
≤
6 μAU/cm (at 254 nm with a 50 mm LightPipe, a 1 mL/min flow rate (MeOH),
20 Hz diode array scan rate, 5 Hz data rate, 5 nm bandwidth, and 2 second rise time)
Drift
*
:
≤
1 mAU/hour after warm up at 254 nm at a stable temperature (
±
1 °C)
Warmup time:
90 minutes to meet noise and drift specifications
Linearity: deviation
≤
5% up to 2.0 AU at 256 nm
Scan rate:
0.5, 1, 2, 4, 5, 10,, 40, or 80 Hz (user selectable)
Diode array scan rate
20, 40, or 80 Hz (user selectable)
Rise time:
0.0, 0.02, 0.05, 0.1, 0.2, 0.5, 1, 2, 5, or 10 s (user selectable)
Cell dimensions:
10 mm LightPipe flowcell or 50 mm LightPipe flowcell
Cell pressure rating:
1000 psi
Diodes: 512
Diode spacing:
1.2 nm
Light source:
Deuterium and tungsten-halogen lamps, pre-aligned
Filter wheels:
Standard filter wheel: two-position wheel, one open position and one Holmium
oxide/perchloric acid-filled cuvette, NIST traceable. Optional linearity verification
wheel: five-position wheel, one with perchloric acid blank and four cuvettes with
different concentrations of potassium dichromate in perchloric acid, NIST traceable
Analog outputs (2):
20-bit digital/analog conversion, three outputs/channel scaled to 10 mV/AU,
100 mV/AU, or 1.0 V/AU
Remote controls:
Start, Zero
Dimensions: 18
cm
(7.1 in.)
×
36 cm (14.2 in.)
×
47 cm (18.5 in.) (
h
×
w
×
d
)
Weight: 19.5 kg
(43 lbs)
Power requirements:
100/115 or 230 V ac; 50/60 Hz, 200 VA max
Operating temperature:
+10 to +30 °C
Storage temperature:
- 40 to +70 °C
Operating humidity:
5% to 95% non-condensing relative humidity
Product certification:
CE, TUV-C/US, FCC (EMI)
