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CHAPTER 6
6. Calibration
6.1 Calibration Overview
The 8000 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.
6.1.1 Environmental Conditions
Calibrate this instrument under laboratory conditions. We recommend calibration at
25°C ± 1.0°C. When necessary, however, the 8000 may be calibrated at its intended
use temperature if this is within the specified operating temperature range of 0°C to
40°C.
6.1.2 Warm-Up
The 8000 should be allowed to warm up for at least 1 hour before calibration.
6.2 Laser Calibration
This chapter describes how to calibrate the 8500/8600 Series laser modules.
6.2.1 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
Mfg./Model
Specification
DMM
HP 34401A
DC Amps @ 1.0 A): ±1%
Resistance (@ 10 ohms): 0.02%
Resistor
High Power,
Low Temperature
Coefficient
1 Ω, 50 W; 2 Ω, 25 W; 5 Ω, 10 W;
10 Ω, 5 W; 30 Ω, 2 W
Optical
Isolator
NEC PS2501-1
or equivalent, 6-pin
Connector
D-sub
9-pin male
Table 9 - Recommended Test Equipment
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