Newport 5600 Series - Local Operation I; PD Current Calibration; Figure 20 - IPD Calibration Circuit

54 Chapter 7 Calibration
h. Once the actual current value is entered via the second
LAS:LDI
command, the 5600 leaves the current calibration
mode.
If, at any time prior to the second
LAS:LDI,
a command other
than
LAS:LDI
or
LAS:CAL:LDI?
is sent to the 5600, the 5600
will cancel the calibration mode and then process the
command(s).
The *
OPC?
query may be used to determine when the
calibration is completed.
The operation complete flag (bit 0 of the Standard Event Status
Register) may be used to trigger an interrupt. This type of
interrupt is enabled by setting bit 0 of the Service Request
Enable register and using the
*OPC
command.
7.2.4 Local Operation I
PD
Current Calibration
This procedure calibrates the feedback circuits for constant I
PD
and constant
P
PD
modes. The user enters the actual value of the current, as measured by an
external DMM. The 5600 then automatically calibrates the laser feedback
circuits.
The I
PD
calibration circuit is diagrammed below.
R1
100
0.1 Ohm
NEC PS2501-1
R3
100
V
A
Ipd Current
Ammeter
Voltmeter
LD Cathode
PD Anode
LD Anode
PD Cathode
Connector
4
3
1
2
Figure 20 - I
PD
Calibration Circuit
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com