Sentry Industries 5000 - Manual (Page 86)

SMC sierra monitor corporation Sentry Instruction Manual - Version 6
SERVICE
Page: 80
7. Apply span gas. Adjust the gain potentiometer
until TP10 = correct value as described above.
To increase voltage at TP10 turn the gain
potentiometer counter clockwise.
8. Remove system power and re-install the sensor
and transmitter in the enclosure. Restore power
and calibrate.