Fluke 5500A, Service Manual

Page: 203 / 296

SC300 Option
SC300 Calibration Setup
6
6-77
Table 6-41. SC300 Calibration and Verification Equipment (cont.)
Instrument Model Minimum Use Specifications
Leveled Sine Wave Frequency, Time Marker Verification
Frequency
Counter PM 6680 with option
(PM 9621, PM 9624, or
PM 9625) and (PM
9678) 2 ns to 5 s, 50 kHz to 500 MHz: < 1.6 ppm uncertainty
Adapter Pomona #3288 BNC(f) to Type N(m)
BNC Cable (supplied with SC300)
Wave Generator Verification
AC
Measurement Fluke 5790A Range 1.8 mV p-p to 55 V p-p
Standard
Frequency 10 Hz to 100 kHz
Adapter Pomona #1269
BNC(f) to Double Banana
Termination
Feedthrough 50
Ω ±
1%.
BNC Cable (supplied with SC300)
6-100. SC300 Calibration Setup
The procedures in this manual have been developed to provide users the ability to
calibrate the SC300 at their own site if they are required to do so. It is strongly
recommended that, if possible, you return your unit to Fluke for calibration and
verification. The unit should be returned with its cable. The Calibrator Mainframe must
be fully calibrated prior to performing any of the SC300 calibration procedures.
The hardware adjustments are intended to be one-time adjustments performed in the
factory, however, adjustment may be required after repair. Hardware adjustments must
be performed prior to calibration. Calibration must be performed after any hardware
adjustments. See “Hardware Adjustments” in this chapter.
The AC Square Wave Voltage function is dependent on the DC Voltage function.
Calibration of the AC Voltage function is required after the DC Voltage is calibrated.
The Calibrator Mainframe must complete a warm-up period and the SC300 must be
enabled for at least 5 minutes prior to calibration to allow internal components to
thermally stabilize. The Calibrator Mainframe warm-up period is at least twice the
length of time the calibrator was powered off, up to a maximum of 30 minutes. The
SC300 is enabled by pressing the front panel
a
key. The green indicator on the
a
key will be illuminated when the SC300 is enabled.
Much of the SC300 can be calibrated interactively from the front panel. Enable the
SC300 and wait at least 5 minutes. Enter Scope Cal mode by pressing the front panel
S
key, CAL blue softkey, second CAL blue softkey, and SCOPE CAL blue
softkey. Entering Scope Cal mode prior to having the SC300 enabled for at least 5
minutes will cause a warning message to be displayed.
All equipment specified for SC300 calibration must be calibrated, certified traceable if
traceability is to be maintained, and operating within their normal specified operating
environment. It is also important to ensure that the equipment has had sufficient time to
warm up prior to its use. Refer to each equipment’s operating manual for details.
Before you begin calibration, you may wish to review all of the procedures in advance to
ensure you have the resources to complete them.