AEGIS
CZ20252 User Guide
www.aegis.net.au
5
Operation
Before Operation
1. Remove the battery hatch and install 9V battery
in the battery compartment ensuring correct polarity.
2. Ensure the telecommunications line to be tested
does not have a hazardous voltage present before
connecting the Test phone.
Talk/Vdc/Monitor switch
The CZ20252 has three basic modes of operation: Vdc, Talk, and
Monitor modes. The CZ20252 should always be connected in the Vdc
position initially to monitor for any high voltages. If high voltages are
indicated do not commence testing. Once the line is confirmed to be
safe for a test connection always use Monitor mode to listen for any
active services before switching to Talk mode to prevent disconnecting
an active service.
Operating the CZ20252 in Vdc mode
Line voltage test
1. Set the function switch to “Vdc” position.
2. Connect the CZ20252 to the telecommunications line
3. Press Vdc button to measure the voltage.
4.
Indication of the voltage level is shown by the Vdc LED
indicators. If neither LED is lit the detected voltage is <24VDC.
Otherwise the voltage range is indicated by a combination of
the LED’s illuminates as shown in the following table:
DC voltage-indication list
LED(LO)
Green than
transitions to red
Higher than 24V
Red
Higher than 100V
LED(HI)
Green than
transitions to red
Higher than 120V
Red
Higher than 200V
