Overall Quality Construction, Safety and Workmanship:
Look the equipment
over for fit and finish. Small things matter like connectors, displays
and controls. The equipment should be quiet. Noisy equipment is vibrating
something loose. There should be no knife-sharp edges to cut an operator
you purchase should be well-engineered, safe and reliable. ISO 9001
certification of the manufacturer's facility is a good indicator of
overall manufacturing system quality. The equipment should feature
a CE, UL, CSA, VDE or similar certification
for safety and conformance. Many manufacturers' designs are
unable to achieve this due to poor design practices, construction
methods, electrical safety and EMI issues. Incredibly, there are no
government requirements for minimum safety and conformance of scientific
equipment manufactured in or exported to the U.S. It is the purchaser's
responsibility to determine the safety and suitability of the equipment.
Play it safe with hydrogen-fueled instruments!
Be sure that the equipment you select has been passed and certified
by a major independent product testing lab and bears UL, CSA, or CE
Integrity / Data Quality:
It is not possible
to speak for other manufacturers on the following issues as they are
somewhat broad and can get very detailed. Suffice it to say that we
are confident that we lead all others on these
points by a wide margin. Here are details of our approach to
data quality and overall quality:
The Signal Instruments
Model 3000HM's processor time and date-stamps
the last calibration adjustment, displays the current calibration
relative to the maximum allowable adjustment and rejects adjustments
which indicate severe malfunction. Out of tolerance conditions are
indicated on the calibration report and the last good
calibration data is retained.
which affect the calibration
(oven, detector, catalyst temperatures, reference & fuel pressures
and sample & calibration gas flows) are all available simultaneously
with continuous concentration data via the menu interface and as serial
data. These parameters are continually monitored
and flag a failure alarm if out of adjustment. Conditions that result
in a failure alarm cause the equipment to automatically shutdown to
a safe, standby condition. Upon correction of the alarm condition,
the analyzer operaration may be immediately resumed.
for fuel and reference are of a high accuracy, tool access type which
cannot be adjusted inadvertently (during shipment or by knob-twisting)
and do not require adjustment during calibrations or normal servicing.
These settings are easily verified and adjusted
to factory specifications by the operator.
Copies of original
quality control checkout documents are included with the new monitor
and maintained on file at K2BW Environmental Equipment Co. for operator
assistance and electronic distribution.
The 3000HM heated
hydrocarbon monitor's response is insensitive to a wide range of sampling
pressure conditions and reaches full rated accuracy
within one hour.
circuits and display functions are designed
to fail-safe, operate closed-loop under microprocessor control
and are adjustable only within their normal operating bands. Actual
flame temperature is monitored and available to the operator to assist
in fault isolation.
The FID combustion
air supply is completely internal to the analyzer, eliminating the
need for external supplies of compressed hydrocarbon-free air. This
unique design employs a true catalyst which eliminates all ambient
hydrocarbon species (including methane). The internal combustion air
supply may also be easily used for calibration zero gas (also allows
verification of catalyst efficiency), eliminating
the requirement for external supplies of compressed zero air. This
standard internal feature alone saves the expense and complication
of external combustion air and zero gas supplies.
Many of the sources
of calibration and data error have been eliminated in the Model
3000HM and an excellent audit trail may be established using the instrument's
status and alarm information along with concentration and process
The Model 3000HM
has been designed to use the power of its microprocessor to make operation
simple and safe. It's backlit LCD display and soft key operation allow
new users to operate the instrument without continually referring
to the manual. The user needs only to provide the instrument with
fuel gas, apply electrical power and press the "sample"
soft key. The instrument will perform all the necessary self checks.
When the detector assembly is up to operating temperature (about 15
minutes), the instrument lights itself, sampling from the internal
zero air supply. Upon reaching an acceptable air catalyst and flame
temperature, the sample path opens. All of this
occurs automatically, without further operator intervention.
zero and span points may be programmed to initiate and adjust automatically
or can be performed manually. Two fully programmable (high or low
going) level alarms allow the analyzer to trigger events or alert
operators via relay outputs.
The model 3000HM's
electro mechanical design is inherently reliable. A 0.4 micron sintered
Teflon® filter element offers superior particle exclusion to other
types, is cleanable and does not corrode or shed fibers into the instrument.
The sample filter housing and all components in contact with the gas
sample are connected in a solid 316 stainless steel block which is
actively heated to 193 C. This drastically reduces
the number of tubing connections required and eliminates the likelihood
of leaking tube fittings. The Model 3000HM also contains fewer
moving parts while achieving greater function than competitive
equipment; it has one pump assembly, one cooling fan and four solenoid
valve operators. All electronic printed circuit boards are mechanically
secured in a standard card cage with locking card retainer. The compact,
3RU formed aluminum case is light and strong and suitable for 19"
rack mounting or bench top use.
Due to a reliable,
automatic ignition system, the igniter is unlikely to burn out. It
may be replaced without opening the heated detector assembly during
The Signal Instrument
Model 3000HM's warranty is two full years against defect in materials
and workmanship. We want you to be happy with your decision to purchase
our instruments so we will work with you on applications and service
for as long as you own them. Initially, we will do our best to equip
you for your application with the proper sampling accessories, heated
line and spares appropriate for your needs. Then, for a full
two years we will repair or replace (at our option, of course)
any equipment which does not operate in conformance with the new equipment
specification due to a manufacturing defect. And we'll make every
effort to do it within three work days. We will even perform routine
cleaning and adjustment for you free of charge.
Just pay for shipping. After that, expect unlimited
free applications engineering, troubleshooting assistance and
all parts and major subassemblies kept in stock for immediate delivery
(should you prefer to maintain it yourself). And if you have a truly
major problem, we offer fixed-cost rental instruments
while yours is in for repairs.
The Model 3000HM
is actually less expensive to own and operate than other heated total
hydrocarbon analyzers. While some other manufacturer's instruments
may sometimes be priced lower for the basic instrument, these invariably
require the purchase of additional equipment to achieve similar performance
to the 3000HM. External heated pumps, supplies of combustion air or
zero gas cylinders may need to be purchased separately. Remote control,
alarms, auto-ranging and automatic lighting are usually only available
in other manufacturer's equipment as options at additional cost. Simultaneous
availability of voltage and isolated 4-20 mA current outputs and bi-directional
RS-232 (which allows data logging on a standard PC without special
A/D converter boards, etc.) are usually unavailable, or special order
3000HM has all of this as standard as well as the excellent paged
menu user interface. Our 2-year warranty and
free preventive maintenance offer alone saves thousands on
a purchase over other manufacturers' equipment.