RKI Instruments 71-0533, Руководство оператора, Страница: 48 / 61

48 • T3A Transmitter
WARNING: When securing the lid onto the device, tighten the enclosure lid by hand
ONLY. Overtightening of the lid by use of hand-tools could result in damage to
the O-ring, potentially compromising the moisture seal, resulting in an unsafe
environment.
Calibration Frequency
A calibration should be performed EVERY thirty (30) days. Days since the last calibration
should NEVER exceed ninety (90) days. RKI recommends that you calibrate your device
regularly to ensure proper functionality and a safe work environment.
Calibration
Calibration is the process of evaluating and adjusting the precision and accuracy of
measurement equipment. Although RKI calibrates every device at the factory, for best
accuracy, the detector SHOULD be calibrated in the environment where it is installed.
Materials
• 0.5 LPM fixed flow regulator with knob
• calibration cup
• calibration tubing
• zero air cylinder (if not in a fresh air environment)
• calibration cylinder; RKI recommends using 50% of the full scale value of your
detected gas
NOTE: Use Cl
2
to calibrate a ClO
2
sensor. The ClO
2
sensor does not have a response factor
for Cl
2
. It responds as it would to ClO
2
.
Zeroing the Sensor
The first step of calibration is zeroing. The zeroing process MUST be performed in known
clean air, with no contaminants or hazardous gasses present. If air quality cannot be
guaranteed, a cylinder of zero air will be required to properly zero the sensor.
1. While the product is in normal operating mode, press the MENU button to activate the
Operation Settings menu.