101B - PAGE 11
4.0 OPERATION OF VACUUM GAUGE
1
) Plug the 6-foot power cable into any single 115V phase AC line. Line frequency is unimportant and 50, 60 or 400 cycle
power will provide satisfactory operation. A 3-wire grounded power cord is supplied with all gauges, including the European
230V models (prefix "E" added to the model number denotes 230V, i.e. EVT-4). Where applicable, turn the ON-OFF switch to
"ON". Allow several minutes for warm-up.
NOTE: VT-4A, 5A, and 6A Models require 115 VAC; EVT-4A, 5A, and 6A Models require 230 VAC, 50-60 cycle, single
phase supply voltage.
2
) With the gauge tube unplugged, set the mechanical zero to indicate the center dot past "ATM" for all VT-6 models (see Fig.
5.1, page 9).
3
) Plug gauge cable onto gauge tube, and meter should indicate "ATM". If a calibration check is desired, follow the directions
in Section 5.2.1 or 5.2.2, whichever is applicable.
4
) Gauge can now be operated with a vacuum tube that has been installed as detailed in Section 3.5.
Summary of Contents for DV-20
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Page 26: ...101B PAGE 26 VT 4B VT 6B Schematic information from Hastings drawing 30429 rev P ...
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Page 29: ...101B PAGE 29 VT 4A VT 5A VT 6A Schematic information from Hastings drawing 30472 rev J ...
Page 30: ...101B PAGE 30 VT 4S2 VT 6S2 Schematic information from Hastings drawing 30506 rev F ...
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