TB 9-6625-128-24
IDENTIFICATION AND DESCRIPTION
1. Test Instrument Identification.
This bulletin provides instructions for the
calibration of Oscilloscope, Goodwill Instruments, model GOS622G. The manufacturers'
manuals were used as the prime data sources in compiling these instructions. The
equipment being calibrated will be referred to as the TI (test instrument) throughout this
bulletin.
a. Model Variations. None.
b. Time and Technique. The time required for this calibration is approximately 3
hours, using the dc and low frequency technique.
2. Forms, Records, and Reports. Forms, records, and reports required for calibration
personnel at all levels are prescribed by TB 750-25.
3. Calibration Description. TI parameters and performance specifications which
pertain to this calibration are listed in table 1.
Table 1. Calibration Description.
Test instrument parameters
Performance specifications
Calibrator
Range: 2.0 V p-p, 1 kHz
Accuracy: Voltage: 2% of nominal; Frequency: 5% of nominal
Vertical Sensitivity
Range: 1 mV to 5 V/div, 5 div compared to center of display
Accuracy: 1 to 2 mV/div, ≤5% of applied;
5 mV to 5 V/div, ≤3% of applied
Vertical Bandwidth
Range: 1 to 2 mV/div, DC to 10 MHz;
5 mV to 5 V/div, DC to 20 MHz
Accuracy: ≤3 dB
Range: INT: 0.5 div, DC to 5 MHz; 1.5 div, 5 to 20 MHz;
Triggering
EXT: 0.1 V p-p, DC to 5 MHz; 0.2 V p-p, 5 to 20 MHz
Accuracy: Stable display
Range: 0.1 μs to 0.5 s/div
Sweep Time
Accuracy: 3% of applied
Range: X10 MAG: 10 ns to 50 ms/div
Accuracy: 8% of applied, 10 to 50 ns/div;
5% of applied, 0.1 μs to 50 ms/div
X-Y
Range: Sensitivity, 1 mV to 5 V/div
Accuracy: NORM: 4% of applied; X10 MAG: 6% of applied
Range: Bandwidth, DC to 1 MHz
Accuracy: <3 dB
Common Mode Rejection Ratio
Range: 50 kHz, sine wave
Accuracy: ≥50:1 w/CH1 and CH2 at same setting