GE Security EST3 - Preliminary Field Wiring Testing

Installation
EST3 Installation and Service Manual 5.19
Preliminary field wiring testing
We recommend that you test all circuits before they are
connected to the control equipment. Table 5-3 indicates the
recommended tests and acceptable test results.
Note: Individual devices are not checked as part of these tests.
All equipment installed on field circuits must be individually
tested to ensure proper operation when the system running.
Table 5-3: Field wiring tests
Circuit type Test
DC notification appliance
circuit
1. Measure the resistance between conductors. The circuit
resistance should be infinite if no devices are installed on the
circuit. The circuit resistance should be approximately 15 kΩ
when the polarized notification appliances and the end
-of-line
resistor are correctly installed.
2. Reverse the meter leads. The circuit resistance between
conductors should read approximately 10 Ω to 20 Ω. If the
resistance reading is still approximately the same value
when the meter leads are reversed, one or more polarized
devices are installed incorrectly.
3. Measure the resistance between each conductor and earth
ground. The resistance should be infinite.
Audio notification appliance
circuit
1. Measure the resistance between conductors. The circuit
resistance between conductors should be infinite if no
devices are installed on the circuit. The circuit resistance
should be approximately 15 kΩ when the polarized
notification appliances and the end
-of-line resistor are
correctly installed.
2. Reverse the meter leads. The circuit resistance between
conductors should still read approximately 15 kΩ.
3. Measure the resistance between each conductor and earth
ground. The circuit resistance between a conductors and
earth ground should be infinite.
Signature data circuits 1. With field wiring disconnected, verify the continuity of each
conductor. Each conductor should measure less than 38 Ω.
2. Measure the resistance between conductors. The circuit
resistance between conductors should be infinite if no
devices are connected to the circuit. The circuit resistance
between conductors should be between approximately 18
kΩ (250 devices) and 4.5 MΩ (1 device) when devices are
installed.
3. Measure the resistance between each conductor and earth
ground. The circuit resistance between a conductors and
earth ground should be infinite.