Druck ADTS 405 Service Manual
K171 Issue No. 1 Page 5-4
Procedure
17. The calibration check should be carried out with the ADTS 405 in the normal operating mode.
The following equipment is required:
Note: Equivalent substitutes can be used.
• Pressure standard accuracy ±0.01%FS
absolute and gauge
• IBM PC with IEEE 488 interface
(1) Connect the pressure standard.
(2) Switch on the ADTS 405 and wait for the start-up sequence to take place.
(3) After a successful start-up sequence, enter the calibration mode by simultaneously
pressing keys F1 and F4.
The display shows:
(CALIBRATION)
F1 MAIN CALIBRATION
F2 CALIBRATION CHECK
F3 RATE CALIBRATION
Note: The main calibration facility is used at depot level by qualified personnel.
(4) Press F 2 - Calibration check.
(5) Switch on the pump unit.
(6) Select the pressure source - internal.
(7) Set the channel to be checked:
Ps
Pt
Ps and Pt
(8) Select the combined channel check - Ps and Pt.
Note: For only checking the Ps channel, use the values in table 5-2.
(9) Enter the first aim value in table 5-1 and record the value on the pressure standard.
(10) Repeat this for further values in table 5-1 until after point 8 press [Ps END].
CAUTION: THE Ps SENSOR WILL BE OVER-PRESSURED AND DAMAGED UNLESS [PsEND] IS
SELECTED.
(11) Enter the remaining values in table 5-1 for the Pt channel and then press [Pt END].
(12) Compare the recorded values and with the applied values, the difference must not be greater
than ±0.012% Ps and ±0.015% Pt of the applied values.
(13) If the difference exceeds these values, repeat the procedure. If the differences still exceed these
values, return the unit to depot.
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