NH
3
R
ESPONDER
Operating Manual
12
Calibration and Alarm Setpoints
Calibration Technologies provides rapid
turnaround calibration service, which
includes a certificate of calibration that
satisfies OSHA PSM documentation
requirements for the detector. Six
month intervals are recommended.
Call 866-394-5861 to arrange shipment.
Guidelines
When calibrating the detector, adhere to the following
guidelines:
•
The detector is shipped with a factory calibration.
Calibrate the detector on a regular schedule,
depending on use and sensor exposure to poisons
and contaminants. CTI recommends once every
180 days (6 months) under normal use.
•
Required gas cal gas:
PID: 250 ppm Ammonia, balance air
LEL: 50% LEL Methane (2.5%)
•
Special calibration gas mixes and kits are available
from Calibration Technologies.
•
If a certified calibration is required, contact
Calibration Technologies.
Calibration Procedure (AutoCal)
Verify that the calibration gas being used matches the
span concentration values that are set for the detector.
Refer to
Span Gas Value
section on page 8. Correction
factors are not applied during calibration. Correction
factors that were set prior to calibration are restored
when the detector returns to normal operation.
Note: Selecting sensor(s) to be calibrated (step #3) is
not necessary for calibration of the PID and LEL
sensors as the cal gas being used will only be detected
by its corresponding sensor.
Start Calibration
1. To enter calibration, press and hold and
simultaneously as the detector beeps, flashes, and
vibrates to the corresponding countdown. The
detector then reads
Starting calibration
.
Auto Zero
2.
Auto Zero
flashes while the detector automatically
zeroes the sensors. Do not apply calibration gas
during this process, otherwise the auto zero step will
fail.
