User`s manual

Page 10 · 4200-DR Series LaserSource User’s Manual
Whenever an error is generated, the red Error LED will light, and the error will be
displayed on the VFD display. There may be one or more errors, but only the
first error will be displayed. To display the next error, press Menu button. To
clear all errors, press the knob. A list of error codes can be found in the Error
Messages section below.
When the unit is in remote mode, the yellow Remote LED will be lit. More
information about how the instrument behaves in remote mode can be found in
the Remote Mode Operation section below.
Main Display Screen
On the main display you will find the set point and two measurements. Which set
point and measurements are displayed will depend on the control mode you
have selected. An example display is shown below:
Sample Display
Measurements
One of the advantages of the 4200-DR is its ability to display both the set point
and two measurements simultaneously. The table below shows which values will
appear on the display depending on the mode selected:
Mode Setpoint Displayed Measurements
Io Current (mA) PD current or power and voltage
Im PD current (μA) Current and voltage
Po PD power (mW) Current and voltage
Vf Voltage (V) Current and PD current or power
The instrument will show photodiode current or photodiode power, depending
on the value of PD Resp. Photodiode current is shown whenever PD Resp is
zero, while photodiode power will be shown whenever PD Resp is non-zero.
See the Control Modes section below for more information on the various
modes.
You can control the resolution of the Io set point and measurement by adjusting
the Io Res setting in the menu. This gives you the flexibility of adjusting the
resolution to the needs of the application. For example, if you are adjusting
between 50mA and 80mA, you may not need the 0.005mA resolution the 4201-