SMC sierra monitor corporation

Sentry Instruction Manual - Version 6

The SENSOR FAILURE message for toxic gas sensors does not indicate a specific failure of the sensor but indicates that the sensor is not correctly connected to the electronics. If this message appears check that the sensor harness is correctly installed to the connector on the bottom electronics board.

The gas sensor which is located inside the sensor assembly housing can be replaced without replacement of the housing. To replace the sensor:

1.Confirm that system power has been removed.

2.Remove the transmitter electronics board from the main housing and unplug the sensor harness from the transmitter electronics.

3.Unscrew the sensor housing from the bottom of the enclosure

4.Hold the sensor assembly so that the harness faces down and the sensor faces

 

up. Unscrew and remove the round

 

 

 

 

 

 

 

 

 

 

 

 

 

 

section

of

the

housing

from

the

hex

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

section. Be careful not to lose the spacer

 

 

 

Figure 7-12

 

 

 

 

 

 

 

 

 

Toxic Gas Transmitter Component Locator

 

 

 

 

 

 

washer which will be sitting on top of the

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

exposed sensor.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.

Adjust

the

span

potentiometer so

that

it

is

 

5.

Carefully pull the old sensor straight up from the

 

 

approximately

mid

range.

(Twenty

turns

 

 

socket.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

clockwise and tens turns counter-clockwise).

 

 

6.

Orient

the

new

sensor

so that

the

sensor pin

 

 

 

2.

Remove system

power and

remove

both

the

 

 

labeled “C” faces the socket labeled “C” which is

 

 

 

transmitter

and

the sensor assembly

from

the

 

 

on the far side of the board from the vertical reed

 

 

 

 

enclosure. Remove the sensor assembly cover so

 

 

switch. The reed switch will slide into a hole on

 

 

 

 

that the sensor is visible.

 

 

 

 

 

 

 

the side of the new sensor. Press the new sensor’s

 

 

 

 

 

 

 

 

3.

Plug the sensor harness into the

transmitter

 

 

pins into the three sockets.

 

 

 

 

 

7.

Carefully

replace the

cover

on

the sensor

 

assembly and

check

that no

components

are

 

 

touching the enclosure. Restore power and allow

 

 

assembly including the spacer washer.

 

 

 

 

 

 

 

 

 

 

a minimum of 30 minutes for stabilization before

 

8.

Install the sensor assembly into the enclosure and

 

 

 

adjustment.

 

 

 

 

 

 

 

 

 

 

 

tighten firmly.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4. Connect a DVM across TP10 and GT1 on the

 

9.

Reconnect the sensor harness to the transmitter,

 

 

transmitter assembly. Figure 7-12

 

 

 

 

 

 

install the transmitter into the housing and restore

 

 

 

 

 

 

 

5.

Locate

the

gain

potentiometer

which

is

on

the

 

 

power.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

sensor electronics directly behind one of the holes

 

10.

Allow one hour for the sensor to stabilize prior to

 

 

 

in the

sensor

body.

The potentiometer is

 

 

recalibration.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

accessible by inserting a jewelers screwdriver

 

11.

Recalibrate the sensor module.

 

 

 

 

 

through the hole in the sensor.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6. Determine the correct value to be read at TP10

 

7.9.3.3

SENSOR OUTPUT ADJUSTMENT

 

 

 

 

based on the following formula:

 

 

 

 

 

 

The following procedure is to be used when, during

VTP10 = 2(C/R) , where C = concentration of span gas,

 

normal calibration of a new sensor, the span voltage

 

and R = range of detection (100 PPM). The value

 

cannot be adjusted to a high enough level.

 

 

 

 

 

is negative for all models except 5100-06, and

 

 

 

 

 

 

 

 

 

 

 

 

5100-19.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SERVICE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Page:

79

 

 

 

 

 

 

 

 

 

 

 

 

Page 84 Page 86
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Sentry Industries 5000 instruction manual Toxic Gas Transmitter Component Locator, Service
Page 84 Page 86

5000 specifications

Sentry Industries 5000 is a cutting-edge security and surveillance system designed for both commercial and residential applications. With its robust features, state-of-the-art technologies, and user-friendly interface, the Sentry Industries 5000 has established itself as a leader in the security industry.

One of the primary features of the Sentry Industries 5000 is its advanced motion detection system. Equipped with smart sensors, the system effectively differentiates between human movement and other disturbances, such as pets or passing vehicles. This smart detection reduces false alarms, providing peace of mind and ensuring that users are alerted only when genuine security threats are present.

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In summary, the Sentry Industries 5000 is a comprehensive security solution that excels in features, technology, and user experience. With advanced motion detection, high-definition surveillance, flexible connectivity, and strong security measures, it stands out as an ideal choice for those looking to enhance their security measures in an increasingly challenging world.
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