Hitachi U-2001 spectrophotometer

Hitachi U-1000, U-1100 spectrophotometers

Menu in Datalyse

Measure at one wavelength
Spectrum, wavelength scan
Baseline, wavelength scan
Zero value absorbance

Baud rate 4800, even parity, 2 stop, 7 data bits. No command  for version.

Wavelength interval:

U-1000: 325 nm - 1100 nm
U-1100: 200 nm - 1100 nm

It is possible to measure absorbance (transmittance and concentration).


Hitachi U-1100 cannot scan a spectrum, so Datalyse runs through the wavelength interval. The data from the baseline is placed in column C in the table. Once the baseline has been measured, column C in the table will automatically be subtracted at a scan. If you experience problems, try reducing the wavelength interval to for instance [400 nm; 800 nm] and remember that an ordinary cuvette does absorb light in the UV-area.


The cable is a standard null-modem cable, available in most computer shops.

You cannot tell from the pc if Hitachi is setup to measure absorbance, transmittance or concentration. If you want to measure transmittance you have to setup the device manually and change the unit from absorbance to transmittance in Datalyse.

Hitachi will beep if it receives a wrong command! This can happen when you setup the device since it e.g. takes 15 seconds to turn on the UV-lamp and as much as 30 seconds to change the wavelength. Try again. If necessary you can turn the UV-lamp on yourself.

Datalyse sets the device up for remote control. But the control is released after each series of measurements.

Datalyse checks if the lamps are lit and will automatically turn the visual lamp on. The UV-lamp is lit if the wavelength is set below 350 nm. When the lamps are lit from the pc, Hitachi will turn off when the remote control is released after each series of measurements.

Hitachi U-1000 has not been tested in Datalyse! Avoid using wavelengths below 325 nm!

Hitachi U-2001 spectrophotometer

Menu in Datalyse:

Table measuring

Hitachi U-2001 sends data to the pc regularly and Datalyse writes the results to the table.

List interval is set in the menu instr setup on the Hitachi.

Print format must be set for one set of data for each line.

A Wave-Length Scan is send with the largest wavelengths first. Use Options / Sort in Datalyse before drawing the graph.

The cable is a standard null-modem cable, available in most computer shops.

Baud rate 4800, no parity, 1 stop, 8 data bits.

No version command.

Receive terminator must be CR (not CR+LF). Commands to the device are ended with LF (not CR or CR+LF).

Auto serial output must be ON

See chapter 11 Calibration in the manual.

Remote Control is not used! Unfortunately it is poorly designed! If you wish, you can try experimenting with the commands on your own using the Terminal-menu in Datalyse or the windows-program Terminal. It should be possible to have data corresponding to a graph send to pc with one single command, but it is not (or I have not figured out how).

As a result it is only possible to transfer data to the pc while measuring them.

Improvement April 2005

It is now possible to use the Terminal menu to receive a scan from Hitachi and afterwards to copy the result from the memo to the table in Datalyse or to Excel.