MVE Biological Systems
TEC 3000 Operating and Maintenance Freezer Manual
13289499 Rev H •
101
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Ω
(-)
(+)
7.5. Remote Alarm Tests
7.5.1.
Global Remote
The Global Remote contacts can be checked for continuity using a digital multimeter or ohm
meter.
•
Normal State (No Alarms)
There should be continuity between the COM and NC terminals
The COM
– NO circuit should be open
•
Alarm State
There should be continuity between the COM and NO terminals
The COM
– NC circuit should be open
7.5.2.
Discrete Contacts
The Discrete Contacts can be tested for continuity using a digital multimeter with diode check.
Since the Discrete Contacts are open collectors, the diode check function (
) should be
used.
•
Normal State (No Alarms)
All Discrete Contact terminals should be open with respect to COMMON
•
Alarm State
There should be continuity between the specific active alarm terminal and
COMMON. Inactive alarms should remain open with respect to COMMON
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Ω
(-)
(+)
Содержание MVE 1842P-150
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