1 instrument specifications – Bio-Rad Model 550, Ultramark, and Benchmark Microplate Reader Accessories User Manual
Page 34

Section 7
Specifications
7.1 Instrument Specifications
Operating panel
Membrane keypad with 2 arrow and 6 function keys
Display
2 lines x 16 characters LCD
Printer
20 column, 5 x 7 dot matrix, thermal, built-in
Computer interface
Bi-directional, RS-232 serial communication port
Report types
Raw, Absorbance, Matrix, Limit, Cutoff, and Concentration
Mixing capability
Yes
Photometric methods
Single & dual wavelength
Photodetectors
8 silicon photodiodes
Light source
Tungsten halogen 20 watt, 5000 hour life
Spectral range
400 nm to 700 nm
Filter capacity
Four
Interference filters
Bandwidth 10 nm, center wavelength ±3 nm
Standard filters
415 nm and 490 nm
Optional filters
405 nm, 450 nm, 540 nm, 550 nm, 570 nm, 595 nm,
630 nm, 655 nm
Reading speed
25 seconds single wavelength and 50 seconds dual
wavelength
Indication range
0.000 to 3.500 O.D.
Resolution
0.001 O.D.
Accuracy
±1.5% or 0.015 O.D. at 1.000 O.D. for single wavelength
reading
±2.0% or 0.020 O.D. at 1.000 O.D. for dual wavelength
reading
Linearity
±2.0% from 0.000 to 3.000 O.D. at 405 nm
Reproducibility
±1.0% or 0.005 O.D. in the range 0.000 to 3.000 O.D.
Inter-channel variation
Less than 1.5% or 0.010 O.D. for 0.000 to 3.000 O.D.
Stability and drift
Automatic calibration before each plate reading
Compatible plates
Polystyrene flat, U- and V-bottom, and PVC flex plates
Data storage buffer
Data from last plate read, and reports
Warm-up time
3 minutes
Assay blanks
User-defined or stored assay template
Memory back-up
5 year lithium battery
Self-diagnosis
Checks lamp, battery, filter wheel, and plate transport
Line voltage
100-240 volts AC at 47 - 63 Hz
Power consumption
75 volt amps max.
Dimensions
316 x 286 x 130 mm (W x D x H)
Weight
5 kg
Operating temperature
5 to 35 °C
Storage temperature
-20 to 50 °C
Operating and
0 - 95% non-condensing
storage humidity
31