Time Base Stability (3.3.4)

1.1.8

1.1.8.1

Aging

Aging rate of the internal crystal oscillator is less than 1 PPM per week.

1.1.8.2

Temperature

Over the temperature range of +4 to +40 , the maximum variation in the time base clock

frequency is less than 10 PPM.

1.1.8.3

Line Voltage

10 per cent change in the line voltage within the range stated in paragraph 1.1.7, causes

less than 1 PPM change in the time base clock frequency.

1.1.9

Flow Indicator Input (3.3.5)

1.1.9.1

Input A

Input sensitivity is better than 0.01 volt RMS (sine wave) or 0.03 volt peak (pulse) on the X1

position of the input attenuator, over the frequency range of 5 Hz to 5 KHz. Input impedance

is 100 Kilohms minimum with less than 50 picofarad shunt. Input attenuation factors of 1, 10

and 100 are provided through the Input Multiplier.

1.1.9.1.1 Maximum Allowable Input Voltage

Maximum allowable input voltages without damage to Input A are:

20 Volts pk-pk on X1

position.

200 Volts pk-pk on X10 position.

300 Volts pk-pk on X100 position.

1.1.9.1.2 Trigger Accuracy (TIME A mode)

For a sine wave input, the trigger error for a 60 db signal-to-noise ratio is less than

0.03 per cent/n, where n is the number of periods averaged.

1-10