H Heuer Instruments UMDT51A, User Manual

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Performance Testing
LT51 User Manual 81
9. Performance Testing
The recommended Calibration Interval is two years. Performance Testing should
be performed at a temperature of 20 - 25

C and (20 to 80) % RH Humidity.
The LT51 should be adjusted as specified in the Adjustment Procedure if
performance testing reveals any measurement to be out of specification.
NOTE: Warm-up Time
When adjusting or calibrating the LT51Transmitter, the LT51 should be
configured to transmit a tone at 10 kHz, 0 dBm for a period equal to the
automatic switchoff time for the LT51. Thereafter, the LT51 should be
turned back on, and the adjustment or calibration commenced.
Required test equipment
Description Requirement
Digital Multimeter
ACV: >100 k

, 10 kHz, -50 dBm to +10 dBm

0.02 dB
Oscillator
600

, 10 kHz, -50 dBm to +10 dBm

0.02 dB
50

, 1kHz - 2 MHz, 0 dBm

0.05 dB
Distortion < -50 dB, 1 kHz to 1 MHz
50V DC Standard
50.0 ± 0.05 V
30V AC Standard
30.0 ± 0.03 V / 50 Hz
0

, 50

, 75

,
100

, 590

,
600

, 10k

Resistors
± 0.1 %
Thermal Voltage
Converter
75

terminated input
10 Hz to 3 MHz : 0 dBm ± 0.03 dB