HP 1050 Variable Wavelength Detector (VWD)

Detection Type

Double beam photometer

Noise

< 1.5 x 10-5 AU peak-to-peak at 254 nm, flowing water at 1 ml/min, 1 second response time (10-90%), standard flow cell

Drift

< 5 x 10-4 AU/hour at 254 nm after warm-up.

Wavelength Range

190 – 600 nm, settable in 1 nm increments

Wavelength Accuracy

±2 nm

Wavelength Reproducibility

±0.3 nm

Bandwidth

6.5 nm

Linear Absorbance Range

Better than 1% up to 1.2 AU using acetone at 265 nm

Response Time

0.25, 1 or 4 seconds (10-90%); user-selectable

Spectra

Storage of 1 spectrum during run; scan rate 10 nm/sec; range from 190 to 600 nm, selectable.

Post-run plotting speed from 1 to 50 nm/sec selectable; plotting of background-corrected spectrum

Light Source

Deuterium lamp from 1090/40/50 DAD

Flow Cells

Standard 14 µl volume, 8 mm pathlength cell with 40 bar (588 psi) pressure maximum. Optional micro,

preparative, high-pressure cells are available

Display

Single line, 16 character fluorescent display with real time display of operating parameters and/or absorbance

Control

Integrated keyboard with function keys; parameter editing during run possible; keyboard lock; optional control by computer or 3396 Series II integrator

Parameters

Wavelength, output range, response time, zero, offset, balance, spectrum acquisition

Diagnostic Aids

Wavelength calibration check with Holmium oxide filter

Time-programs

Time-programmable wavelength and output range; storage of up to 5 time-programs

Analog Output

One output user-configurable as recorder or integrator. For recorder: 100 mV or 1 V output range from 0.001 to 4 AU, user-selectable; for integrator:

100 mV/2 AU full scale or 1 V/2 AU full scale, user-selectable

Communications

START (input/output), STOP (input/output), READY (output), SHUTDOWN (output) for synchronization

with other LC modules

Safety Aids

Extensive diagnostics, error detection and display via front-panel LED’s. Leak detection, safe leak handling, leak output signal for shutdown pumping system. Low voltages in major maintenance areas

Environment

Temperature range: 5 to 55°C
Humidity: < 95% (non-condensing)

Power Requirements

Line voltage: 100-120 or 220-240 VAC ±10%

Line frequency: 48-66 Hz

Power consumption: 150 VA max