Calibration Kit - Critical Environment Technologies

Calibration Kit - Critical Environment Technologies
Operation Manual
2016.11
Calibration Kit
www.critical-environment.com
Calibration Kit - Operation Manual
2016.11
standard Calibration kit ContentS
P/N: cet-715a-sdp
q
w er t y
#
2
u i o
w
Description
a
s
Replacement
Part Number
q
Regulator for fixed flow @0.5 LPM for 34 L, 58 L, 74 L and
103 L cylinders
REG-0715-CR2
w
Calibration adapter plug with O-ring and two zeroing port plugs
(adapter plug fits industry standard internal sensor vents)
CET-7000-CAP
e
Humidification chamber for calibrating solid state refrigerant sensors
CET-8000-HC
r
Spare humidification sponge
CET-8000-HCS
t
Calibration adapter cup for remote (ESH) sensors
CET-8000-ESH
y
Magnetic wand for non-intrusive calibration
(2 5/8” x 1/4” hexagon) For use with the LPT-A and SCC
CET-MW
u
Brass fitting to convert fixed flow regulator for use on 15 L and
17 L cylinders
REG-ADAPTER
i
Carrying case
CET-715A-CK1
o
Calibration adapter cup for splash guard
CET-4700-SCC
a
Sensor extracting tool for replacing used catalytic and solid state
refrigerant sensors
CET-8000-SRT
s
Teflon lined tube (2ft) for calibrating sticky gases
(see NOTE on next page)
n/a
© 2016 All rights reserved. Data subject to change without notice.
2016.11
Calibration Kit - Operation Manual
The Calibration Kit is not suitable for use with our YES product line.
SAMPLE DRAW Calibration kit
P/N: cet-715a-sdp
The Sample Draw Calibration Kit contains the same items as the Standard Kit with the addition of a 1.0
LPM demand flow regulator.
Instructions
A bump test will help you determine if a sensor requires calibration. If the sensor still does not respond as
it should after a successful calibration, it probably requires replacing.
Temperature affects calibration. It is important to ensure the gas is at the appropriate temperature during
calibration. If the sensor is being used in an extreme temperature range, calibration should be done in
that same temperature range.
Regulators & Flow
Calibration gases that are lighter than (NH3, H2, CH4 etc. ) or the same weight as air (CO, O2, NO, C2H4, etc.)
should be flowed at 0.5 LPM. Gases heavier than air (NO2, O3, CL2, C3H8, refrigerants, SO2, F2, etc.) should be
flowed between 0.5 and 1.0 LPM. Fixed flow regulators provide more accuracy.
Adapters
The proper calibration adapter should be utilized to allow the gas to properly diffuse around the sensor. A
different adapter will be required if the gas detector has a splash guard installed.
Humidifier
For refrigerant sensors (solid state), an inline humidifier is required for all operations with bottled gas
(bump test, zero and span).
Catalytic, Electrochemical, Infrared and PID Sensors
Before flowing zero air and span gas, remove the sponge (r) from the humidification chamber (e) and
do not use. catalytic sensors require oxygen to work and thus the user MUST flow clean air or oxygen to
obtain a true zero and the span gas must have “air” balance, not N2 balance.
If calibrating an infrared Carbon Dioxide CO2 sensor, it must be zeroed with 100% Nitrogen (N2). All other
infrared sensors for combustibles and refrigerants, along with PIDs should be zeroed with air.
NOTE: Ozone (O3), Chlorine (Cl2), Hydrogen Chloride (HCl), Ammonia (NH3) and Nitrogen Dioxide (NO2) are
considered to be sticky gases, which means they adhere to surfaces. When calibrating these gases, use
Teflon lined tubing so the gas doesn’t saturate and adhere to the tubing, weakening the concentration
of the flow of gas. Also, keep the length of the Teflon tubing to no more than 2 - 3 ft so the gas flow
© 2016 All rights reserved. Data subject to change without notice.
3
Calibration Kit - Operation Manual
2016.11
concentration doesn’t lessen over the distance from the gas cylinder to the sensor.
NOTE: CETCI does not use or sell cylinders of Chlorine gas due to the instability of the gas and the difficulty
to get accurate readings from that source. We recommend that you use a Chlorine gas generator. Contact
CETCI or your Regional Sales Manager for more information.
NOTE: After a substantial warm up period, an Ethylene Oxide sensor should be zeroed on site if the
ambient temperature is above 22°C (71.6°F). This particular sensor has a drift factor that can be as much
as 1 ppm if the temperature rises to 25°C (77°F). With the low set point you could experience false alarms.
NOTE: During calibration, when flowing span gas on an Ammonia sensor, if the reading climbs higher
than the calibration point after applying gas for 3 minutes, use that reading as the calibration point. It
should be around 300 ppm.
Oxygen Sensors
When calibrating an Oxygen sensor, the process is reversed. You need to do the span first and then the
zero.
Flow Nitrogen (N2) over Oxygen (O2) sensors before attempting to null adjust them. If the service person is
confident of air quality and is careful (do not exhale in the direction of the Oxygen sensor being serviced
while span adjusting), oxygen in the breathing environment can be used as a fairly accurate source of span
gas (20.9% volume) “in a pinch”. It is not recommended to use this procedure for all span adjustments of
Oxygen sensors.
Solid State Refrigerant and TVOCs Sensors
Solid-state sensors require oxygen to work and thus the user MUST flow clean air or oxygen to obtain a
true zero and the span gas must have “air” balance, not N2 balance.
Flowing dry gas over solid state refrigerant sensors can result in negative a reaction and inaccurate
readings. Using a humidification chamber increases the humidity and recreates a real-world environment
for the sensor. Wet the sponge (r) with water and gently squeeze out the excess. It should be quite damp
before reinserting it into the humidification chamber (e).
Thread the cylinder regulator (q) onto the cylinder of zero air or span gas, being careful not to cross
thread it. Do not over tighten. If the gas cylinder is the 15 or 17 liter size, apply a little Teflon tape to the
threads of the brass fitting (u) and thread the fitting onto the cylinder regulator (q). Open the valve of
the cylinder regulator by pushing down and turning less than half a turn; zero air or span gas will start
flowing automatically at approximately 0.5 LPM.
Start flow of zero air approximately 1-minute prior to making zero adjustment of circuit allowing sensor
to stabilize. Start flow of span gas at least 2-minutes prior to making span adjustment of circuit. When
4
© 2016 All rights reserved. Data subject to change without notice.
2016.11
Calibration Kit - Operation Manual
calibration is complete, remove cylinder regulator from cylinder. If using the humidification chamber,
remove the sponge and allow it dry out.
For an R11 refrigerant sensor, allow 30 minutes after calibration before considering the LPT-A’s readings
valid. The sensor’s response to R11 refrigerant and to humidity levels can affect the readings of the LPT-A
and can take up to 30 minutes after calibration to recover and stabilize.
Refer to the specific product Operation Manual for complete detailed calibration service and instructions.
CALIBRATION GAS
Gas Cylinders
CETCI offers a range of gas types and concentrations in 17 L, 58 L and 103 L size cylinders. Cylinders of
zero air and / or span gas must be ordered separately. They are not included in the Calibration Kit. Gas
cylinders cannot be shipped from Canada to other countries, including the USA.
GENie Calibration Gas System
The GENie Calibration Gas products are an alternative to calibration gas cylinders, offering a family of
integrateable and expandable calibraton gas instruments that will generate a variety of gases from one
modular instrument.
Features:
» Hand-held and easy to transport
» User adjustable gas concentration created on demand
» Long lasting gas sources
» Traceable to NIST standards
» Non-hazardous for shipping
GENie-EC Electrochemical Calibration Gas System for calibrating Chlorine, Chlorine Dioxide,
Hydrogen, Hydrogen Sulphide and Hydrogen Cyanide sensors.
http://www.critical-environment.com/products/genie-ec.html
GENie-O3 Ozone Calibration Gas System for calibration Ozone sensors.
http://www.critical-environment.com/products/genie-o3.html
GENie-NH3 Ammonia Calibration Gas System for calibration Ammonia
http://www.critical-environment.com/products/genie-nh3.html
Contact CETCI or your Regional Sales Manager for more information:
Unit 145, 7391 Vantage Way, Delta, BC, V4G 1M3, Canada
Toll Free: +1.877.940.8741 Telephone: +1.604.940.8741
Fax: +1.604.940.8745
[email protected]
www.critical-environment.com
© 2016 All rights reserved. Data subject to change without notice.
5
Critical Environment Technologies Canada Inc.
Unit 145, 7391 Vantage Way, Delta, BC, V4G 1M3, Canada
Toll Free: +1.877.940.8741
Tel: +1.604.940.8741
Fax: +1.604.940.8745
www.critical-environment.com
KIT20161115-Calibration-Kit
© 2016 Critical Environment Technologies Canada Inc. All rights reserved. Data in this publication may change without notice.
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