Calibration Adjustment Procedure; General Information; Recommended Calibration Adjustment Equipment - Philips SCOPEMETER PM93 Service Manual

CALIBRATION ADJUSTMENT PROCEDURE
5 - 1
5 CALIBRATION ADJUSTMENT PROCEDURE
5.1 GENERAL INFORMATION
The following information provides the complete Calibration Adjustment Procedure for the
ScopeMeter. Because various control functions are interdependent, a certain order of adjustment is
necessary. The procedure is therefore presented in a sequence that is best suited to this order.
Before you make calibration adjustments, always use the Performance Verification Procedure in
chapter 4 to check the ScopeMeter performance.
The Calibration Adjustment Procedure, described here, consists of the following three parts:
- CONTRAST Calibration Adjustment Procedure
- SCOPE Calibration Adjustment Procedure
- METER Calibration Adjustment Procedure
Almost all Calibration Adjustments can be done without opening the instrument. Only the first four
steps of the SCOPE Calibration Adjustment Procedure require disassembling of the ScopeMeter
(see section 5.6.1).
NOTE: Every year use the Performance Verification Procedure in chapter 4 to check the
ScopeMeter. If the ScopeMeter fails the Performance Verification Procedure, Calibration
Adjustments must be made.
If
the ScopeMeter also fails the Calibration Adjustment
Procedure, repair is necessary (see chapter 7). (After repair, it is sometimes also necessary
to do also
a
Hardware Calibration Adjustment, see section 5.6. 1)
Sections 5.5, 5.6 and 5.7 describe the calibration process in detail. Section 5.8 contains a summary
of all calibration adjustments as a reference for more frequent users.
5.2 RECOMMENDED CALIBRATION ADJUSTMENT EQUIPMENT
The equipment recommended for the Calibration Adjustment Procedure is listed in table 5.1.
All calibration adjustments must be done in ambient temperatures between 18
ac
and 28
ac.
The
ScopeMeter can be used immediately: there is no warm-up time specified.
Table 5. 1 Recommended calibration adjustment equipment survey
Instrument Type Recommended Model
Multifunction Calibrator Fluke 5100B
Square Wave Calibration Generator Tektronix PG 506
Function Generator Philips PM 5134
*) Personal Computer
Any IBM compatible PC, running MS-DOS
*) Optical to RS-232 Interface Cable PM9080/001
*) Flash ROM Refresh software Contact your Service Center
*) + 12V (± 2.5%) Programming voltage
*) These items are required after two or three calibrations, see note paragraph 5.3, page 5.3 for
details.