Dekker Vmax, Installation, Operation And Maintenance Manual

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Inches of HgV PLC Setting
29 234
28 488
27 742
26 996
25 1250
24 1504
23 1758
22 2012
21 2266
20 2520
19 2775
18 3028
17 3282
16 3536
15 3790
14 4044
13 4298
12 4552
11 4806
10 5060
This table will apply to all single and multiplex systems equipped with a Controller after 5/15/02 (all units
supplied with a Controller prior to this date must contact the Service or Engineering department with
serial number of supplied equipment for assistance). These values are entered directly into the
Controller in the appropriate block number for lead and lag pumps. Refer to the specific instruction set
provided with the IOM for block number identification.
- The correct value can also be determined by the following formula:
7600 – (Inches of HgV x 254) = Controller setting
Example: SW
↑
= 3282 – switch pump on at 17”HgV (7600 – (17 x 254) = 3282)
SW
↓
= 2520 – switch pump off at 20”HgV (7600 – (20 x 254) = 2520)
- To determine the vacuum point displayed on the LED of the Controller unit use the following
formula:
“HgV = 29.92 – (Displayed Value/254)
Please note that the values you are working with are Torr values multiplied by 10.
A perfect vacuum is approaching a setting of 0 and at atmospheric pressure at sea-level the setting is
at 7600 (760 Torr x 10).
Settings for Simplex Systems:
- Unless otherwise noted, the standard switch points for a Simplex System will be set at:
Lead pump ON at 17”HgV – OFF at 20”HgV
- Specific block numbers for Simplex Controller Program:
Lead pump =B15
Setting for Duplex Systems:
- Unless otherwise noted, the standard switch points for a Duplex System will be set at:
Lead pump ON at 17”HgV – OFF at 20”HgV
Lag pump ON at 16”HgV – OFF at 19”HgV
- Specific block numbers for Duplex Controller Program:
Lead pump =B15
Lag pump =B16
Alarm visual/audible =B13 (Typically set to come on and off with lag pump settings)
Setting for Triplex Systems:
- Unless otherwise noted, the standard switch points for a Triplex System will be set at:
Lead pump ON at 17”HgV – OFF at 20”HgV
Mid pump ON at 16”HgV – OFF at 19”HgV
Lag pump ON at 15”HgV – OFF at 18”HgV
- Specific Block number for Triplex Controller Program:
Lead Pump =B15
Mid pump =B16
Lag pump =B23
Alarm visual/audible =B13 (Typically set to come on and off with lag pump settings)
Dekker Vacuum Technologies, Inc. – Vmax/13 18