Aalborg DFC Digital - Manual (Page 16)

5.7 Analog Interface Configuration
The DFC can be configured for the desired range and scaling by selection of
analog board (see APPENDIX 1 on page 21) jumpers as follows:
0 to 5 V output: Jumper pins 2 and 3 of JP6.
Jumper pins 2 and 3 of JP3.
Jumper pins 2 and 3 of JP5.
Jumper pins 1 and 2 of JP12.
0 to 5 V input: Jumper pins 2 and 3 of JP2.
Jumper pins 2 and 3 of JP4.
Jumper pins 1 and 2 of JP11.
0 to 10 V output: As for 0 to 5V, but jumper pins 2 and 3 of JP12.
4 to 20 mA output: Jumper pins 1 and 2 of JP6.
Jumper pins 1 and 2 of JP3.
Jumper pins 1 and 2 of JP5.
Jumper pins 1 and 2 of JP12.
4 to 20 mA input: Jumper pins 1 and 2 of JP2.
Jumper pins 1 and 2 of JP4.
Jumper pins 1 and 2 of JP11.
By default the DFC is configured for analog input output ranges set to 0-5V
(unless ordered with special configuration).
6. MAINTENANCE
6.1 Introduction
It is important that the Mass Flow Controller is used with clean, filtered gases only.
Liquids may not be metered. Since the RTD sensor consists, in part, of a small cap-
illary stainless steel tube, it is prone to occlusion due to impediments or gas crys-
tallization. Other flow passages are also easily obstructed. Therefore, great care
must be exercised to avoid the introduction of any potential flow impediment. To
protect the instrument a 50 micron (DFC26) or 60 micron (DFC36/46) filter is built
into the inlet of the flow transducer. The filter screen and the flow paths may require
occasional cleaning as described below. There is no other recommended mainte-
nance required. It is good practice, however, to keep the meter away from vibration,
hot or corrosive environments and excessive RF or magnetic interference.
If periodic calibrations are required they should be performed by qualified per-
sonnel and calibrating instruments, as described in section (7). It is recommend-
ed that units are returned to Aalborg
7 for repair service and calibration.
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CAUTION: TO PROTECT SERVICING PERSONNEL IT IS MANDATORY
THAT ANY INSTRUMENT BEING SERVICED IS COMPLETELY
PURGED AND NEUTRALIZED OF TOXIC, BACTERIOLOGICALLY
INFECTED, CORROSIVE OR RADIOACTIVE CONTENTS.
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