SMC sierra monitor corporation

Sentry Instruction Manual - Version 6

5.3.1.2 LOCAL CALIBRATION

Proceed with the following steps to perform Local Calibration

 

 

Step

 

Activity

 

Display

 

 

 

 

 

 

 

 

1

 

Apply ZERO and SPAN gas to

APPLY 0 & 50% LEL

 

 

 

 

each sensor.

 

1 2 3 4 5 6 7 8

 

 

 

 

 

 

 

 

 

 

Apply zero and span calibration gas to each

 

 

 

 

sensor for which calibration is required. (Sensors

 

 

 

 

which are not exposed will be reported as "Not

 

 

 

 

Calibrated" and will retain their prior calibration

 

 

 

 

status).

 

 

 

 

 

 

 

The calibration gas must be applied via the

 

 

 

 

magnetic delivery head supplied with the Sentry

 

 

 

 

system.

 

 

 

 

 

 

 

1. Remove the rainshield (where applicable).

 

 

 

 

2. Using the apparatus in Section XXX, thread

 

 

 

 

the calibration head into the sensor assembly.

 

 

 

 

At this time the controller top display will

 

 

 

 

lock onto this module number.

 

 

 

 

 

If the ambient environment is one which has been

 

 

 

 

determined to be clean at the time of

 

 

 

 

calibration, leave the magnetic head in place

 

 

 

 

for 30 seconds and then remove. If the

 

 

 

 

ambient

environment

is

potentially

 

 

 

 

contaminated, bleed clean air through the

 

 

 

 

calibration head for two minutes at 100

 

 

 

 

cc/min and then remove the air and the

 

 

 

 

calibration head.

 

 

3.Wait thirty seconds after the magnet is removed. During this period the controller will stop displaying the module number and will show dashes "- -" on the upper display.

4.Thread the calibration head into the sensor assembly a second time. The controller will again lock onto the number for that module but will add a period immediately following the number.

Bleed calibration span gas through the magnetic head at 100 cc (or as required for permeation tube calibrator). The controller will display the concentration which would be determined based on the prior calibration of the module

5.Remove the gas and the calibration head, replace the rainshield and repeat the process for the next module. As each sensor is correctly exposed to calibration gas the respective module number will disappear

 

 

Step

 

Activity

 

Display

 

 

 

 

 

 

 

 

 

 

from the display making

it possible, at any

 

 

 

 

time, to read which modules have not been

 

 

 

 

exposed to calibration gas.

 

 

 

 

 

 

 

 

 

 

2

 

Gas application complete - no

 

CALIB COMPLETE

 

 

 

 

errors

 

PLEASE WAIT 3:00

 

 

 

 

 

 

 

 

 

 

When all modules have received calibration gas

 

 

 

 

press ENTER to indicate completion of the span

 

 

 

 

process. (Required only if module numbers

 

 

 

 

remain on the display)

 

 

 

 

 

 

 

Press ENTER again. (Required only if error

 

 

 

 

messages appear.) If all modules

have been

 

 

 

 

successfully calibrated the controller will begin

 

 

 

 

the three minute time delay before placing sensor

 

 

 

 

modules back on line.

 

 

 

 

 

 

 

 

 

 

 

 

3

 

Error Conditions

 

LOW SENSITIVITY

 

 

 

 

- Low Sensitivity

 

1 2 3 4 5 6 7 8

 

 

 

 

 

 

 

 

 

 

If any sensors failed to respond correctly to the

 

 

 

 

calibration gas the low sensitivity message will

 

 

 

 

identify those sensor module numbers. Note the

 

 

 

 

number and plan corrective action as described in

 

 

 

 

Section 7.

 

 

 

 

 

 

 

 

 

 

 

 

4

 

Error Conditions

 

NOT CALIBRATED

 

 

 

 

- Not Calibrated

 

1 2 3 4 5 6 7 8

 

 

 

 

 

 

 

 

 

 

Press ENTER again. Modules which were not

 

 

 

 

attempted, and any modules which were displayed

 

 

 

 

as "LOW SENSITIVITY", will be displayed as

 

 

 

 

"NOT CALIBRATED".

Press

ENTER to

 

 

 

 

acknowledge Press ENTER to acknowledge

 

 

 

 

 

 

 

 

 

5

 

Return to Operate Mode

 

PRESS ENTER TO

 

 

 

 

 

 

OPERATE MODE

 

 

 

 

 

 

 

 

When the time delay is complete the display will read PRESS ENTER TO OPERATE MODE Press ENTER and the procedure is complete. Repeat the process as necessary to recalibrate modules or to calibrate other gases.

Remove all calibration apparatus from sensors.

CALIBRATION

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Sentry Industries 5000 instruction manual Not Calibrated

5000 specifications

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