Yokogawa AC8 Calibration Units User Manual
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IM 11M6D2-02E-A
10.2.4 Zero Pressure Switch, M1133AR, Figure 10.2.6
The pressure switch is used to alert the Operator via a contact input that the zero gas cylinder needs to be replaced before the
cylinder is empty. The recommended connection is to the high pressure side of the zero gas regulator. Refer to Figure 4.1.
Figure 10.2.6 Zero Pressure Switch, M1133AR
Adjustable Set
30 to 575 psi on fall;
Point Ranges:
50 to 600 psi on rise.
Dead Band:
8 to 60 psi
Over Range:
2,500 psi
Proof Pressure:
3,000 psi
Storage Temperature:
-40ºF to 180ºF (-40 ºC to 82 ºC)
Ambient Temperature:
0 ºF to 160 ºF (-18 ºC to 71 ºC)
Set Point Repeatability:
1% of span
Switch Output:
One SPDT (either NC or NO)
Electrical Rating:
Rated to 5 amps resistive and 15 amps inductive (75% PF), at 125 and 120 VAC, 1/4” HP
Enclosure:
Aluminum with irradiate finish rated for 100 hours of salt spray
Electrical Connection:
One SPDT output; 1/4” NPTF, 5ft cable
Pressure Connection:
1/8” NPTM
Mounting:
NPTM pressure connection
Weight:
12oz (340g)
Approvals:
UL 508 listed, E42272; CSA C22.2, No 14-1987: LR 9690
10.2.5 Fuses, M1132HG
Two fuses are imbedded in the power supply input terminals of the AC4 and AC8 calibration units.
Current Rating:
1 amp
Slow Blow Time:
100% - 4hours maximum
135% - 1 hour maximum
200% - 5 second maximum
Size:
1’4” O.D. x 1 1/4” L
Approvals:
UL Listed, CSA approved