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C H A P T E R
7.
Calibration
7.1
Calibration Overview
The 6000 performs an automatic DAC calibration on power-up. This removes the
majority of calibration error. However, if it is desired to completely calibrate the
system, the following procedures will do so.
All calibrations are done with the case closed. The instrument is calibrated by
changing the internally stored digital calibration constants.
All calibrations may be performed locally or remotely.
7.1.1
Environmental Conditions
Calibrate this instrument under laboratory conditions. We recommend calibration at
25°C ± 1.0°C. When necessary, however, the 6000 may be calibrated at its intended
use temperature if this is within the specified operating temperature range of 0°C to
40°C.
7.1.2
Warm-Up
The 6000 should be allowed to warm up for at least 1 hour before calibration.
7.2
Laser Calibration
This chapter describes how to calibrate the 6500 Series laser modules.
7.2.1
Recommended Equipment
Recommended test equipment for calibrating the module is listed in Table 1.
Equipment other than that shown in the table may be used if the specifications meet
or exceed those listed.
Description
DMM
Resistor
Optical
Isolator
Connector
7
Mfg./Model
HP 34401A
High Power,
Low Temperature
Coefficient
NEC PS2501-1
D-sub
Table 9 - Recommended Test Equipment
73
Specification
DC Amps @ 1.0 A): ±1%
Resistance (@ 10 ohms): 0.02%
1 Ω, 50 W; 2 Ω, 25 W; 5 Ω, 10 W;
10 Ω, 5 W; 30 Ω, 2 W
or equivalent, 6-pin
9-pin male
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