Calibration of Jerome® Hydrogen Sulfide Analyzers
Accurate hydrogen sulfide analysis requires precise instrument calibration. The Jerome® 631-X and 631-XE hydrogen
sulfide analyzers manufactured by Arizona Instrument LLC are factory calibrated using methods traceable to NIST (National Institute
of Standards and Technology). The calibration system used at AZI's manufacturing facility in Tempe, Arizona consists of the
following components:
Calibration Room
All Jerome® calibrations are performed in a climate controlled environment.
Hydrogen Sulfide Gas Source
AZI uses the VICI-Metronics Dynacalibrator™ that contains a precisely controlled heat chamber and gas flow system. A small
permeation tube of hydrogen sulfide is heated in the chamber. A tightly controlled air volume passes through the chamber carrying
the gas to the test stations. The emission of hydrogen sulfide gas from the permeation tube is a known value determined through
successive measurements on an analytical balance. Internal meters that are calibrated to and verified against volume displacement
bubble flow meters control airflow. The Dynacalibrators are calibrated regularly under our ISO -9001 guidelines by VICI-Metronics
with methods traceable to the NIST.
Manifold System
The hydrogen sulfide vapor from the permeation tube exits the Dynacalibrator and passes into a 4-inch PVC manifold tube. This
manifold prevents any positive or negative pressure from affecting the calibration process. This manifold chamber also allows
multiple instruments to be calibrated at one time. Excess hydrogen sulfide is exhausted from the manifold through a charcoal
trap.
Calibration Software
Calibration of the Jerome® hydrogen sulfide analyzers is controlled through proprietary calibration software
developed by Arizona Instrument. Each unit passes through a rigorous calibration protocol to assure the unit's accuracy,
repeatability, and stability. A central computer that controls multiple units along the system manifold controls each step in the
process.
Calibration Frequency
The Jerome® gold film sensor is inherently stable and does not require frequent recalibration. AZI recommends an
annual factory calibration. The interval between calibrations depends on instrument usage and operating conditions.
Arizona Instruments recommends the use of the Jerome® FTM (Functional Test Module, part number Z2600-0918) to verify
instrument operation between annual calibrations. The FTM introduces a known concentration of hydrogen sulfide into the Jerome
analyzer. When the results of this test fall within the expected range, the instrument is operating correctly. If the results are
outside the expected range, the instrument should be considered out of calibration and returned to AZI. Continuous records of
functional checks between annual factory calibrations verify the instrument's operation and help satisfy regulatory requirements.
Flow Meters
The flow of each Jerome® instrument is set to a precise rate prior to and during calibration. Arizona Instrument
uses rotometers calibrated to a bubble flow meter, the primary standard for flow. Each flowmeter is calibrated on a regular basis
with standards traceable to NIST. Calibration records for each flow meter are maintained under ISO 9001 guidelines.
Digital Multimeters
Various electrical test points are measured with digital multimeters that are regularly certified and traceable to NIST.
Calibration records for each multimeter are maintained under ISO 9001 guidelines.
Calibration of Jerome® Mercury Vapor Analyzers
Accurate mercury vapor analysis requires precise instrument calibration. The Jerome® 431-X, 431-XE and 411 mercury
vapor analyzers manufactured by Arizona Instrument LLC are factory calibrated using methods traceable to NIST (National Institute
of Standards and Technology). The calibration system used at AZI's manufacturing facility in Tempe, Arizona consists of the
following components:
Calibration Room
All Jerome® calibrations are performed in a climate controlled environment.
Mercury Vapor Source
AZI uses the VICI-Metronics Dynacalibrator™, which contains a precisely controlled heat chamber and gas flow system. A small
permeation tube of mercury is heated in the chamber. A tightly controlled air volume passes through the chamber carrying the vapor
to the test stations. The emission of mercury vapor from the permeation tube is a known value determined through successive
measurements on an analytical balance. Internal meters that are calibrated to and verified against volume displacement bubble flow
meters control airflow. The Dynacalibrators are calibrated regularly under our ISO -9001 guidelines by VICI-Metronics with methods
traceable to the NIST.
Manifold System
The mercury vapor from the permeation tube exits the Dynacalibrator and passes into a 4-inch PVC manifold tube. This manifold
prevents any positive or negative pressure from affecting the calibration process. This manifold chamber also allows multiple
instruments to be calibrated at one time. Excess mercury vapor is exhausted from the manifold through a mercury trap.
Calibration Software
Calibration of the Jerome® mercury vapor analyzers is controlled through proprietary calibration software developed
by Arizona Instrument. Each unit passes through a rigorous calibration protocol to assure the unit's accuracy, repeatability, and
stability. A central computer that controls multiple units along the system manifold controls each step in the process.
Calibration Frequency
The Jerome® gold film sensor is inherently stable and does not require frequent recalibration. AZI recommends an
annual factory calibration. The interval between calibrations depends on instrument usage and operating conditions.
Arizona Instruments recommends the use of the Jerome® FTK (Functional Test Kit, part number Y431-0902) to verify
instrument operation between annual calibrations. The FTK introduces a known mass of mercury vapor into the Jerome®
analyzer. When the results of this test fall within the expected range, the instrument is operating correctly. If the results are
outside the expected range, the instrument should be considered out of calibration and returned to AZI. A continuous record of
functional checks between annual factory calibrations verifies the instrument's operation and helps satisfy regulatory
requirements.
Flow Meters
The flow of each Jerome® instrument is set to a precise rate prior to and during calibration. Arizona Instrument
uses rotometers calibrated to a bubble flow meter, the primary standard for flow. Each flow meter is calibrated on a regular basis
with standards traceable to NIST. Calibration records for each flow meter are maintained under ISO 9001 guidelines.
Digital Multimeters
Various electrical test points are measured with digital multimeters that are regularly certified and traceable to NIST.
Calibration records for each multimeter are maintained under ISO 9001 guidelines.
Sole Source Letter
Arizona Instrument is the only authorized calibration source for the Jerome® Model 411 or Model 431-X and 431-XE
mercury vapor analyzers and the Jerome® Model 631-X and 631-XE hydrogen sulfide vapor analyzers. The calibration of
the Jerome® analyzers requires a system which is traceable to the National Institute of Standards and Technology
(N.I.S.T.). Using equipment traceable to N.I.S.T. assures that the calibration is both valid and accurate.
A factory calibration for both Jerome® models is recommended annually. To verify the operation of a mercury vapor
analyzer, Arizona Instrument recommends the use of a Functional Test Kit (part number Y431-0902) on a regular basis. To verify the
operation of a hydrogen sulfide analyzer, we recommend the use of a Function Test Module (part number Z2600-0918). For any further
information regarding the Jerome® mercury vapor analyzers, our calibration system or the Functional Test Kit, call
Arizona Instrument Customer Service at (800) 528-7411 or
(602) 470-1414 or contact
Technical Support.
Repair and Calibration Fees (November 1, 2007)
| Model 860 |
$ 135.00 |
$ 295.00 |
| Model J405 |
$ 475.00 |
$ 1100.00 |
Model 431, 431-X, or 431-XE Performed upon request only: Additional Check Points @0.025 mg/m3 and 0.010 mg/m3
1 Check
Point = $160.00
2 Check Points = $320.00 |
$ 475.00 |
$ 1105.00
$1265.00
$1425.00 |
| Model 631-X or 631-XE |
$ 630.00 |
$1265.00 |
| FTM-918, FTM-930 Recalibration |
$ 415.00 |
Not Applicable |
| FTM-918, FTM-930 Recalibration With Perm Tube Replacement |
$ 730.00 |
Not Applicable |
| Data logger |
$130.00 |
Not Applicable |
Calibration
Calibration includes full system check of all subassemblies, circuits and components. Basic adjustments are performed to all reference
and power supply voltages to restore to factory specifications. All internal filters and tubing are replaced. Old filters and tubing
are disposed of properly as hazardous waste.
All Jerome® units receive an NIST traceable certificate of calibration. The NIST traceable calibration certificate
shows incoming and outgoing data and lists test and calibration equipment per A2LA requirements.
Mercury Vapor Calibration and Low Level Checks
All Jerome® mercury vapor analyzers are calibrated at a concentration of approximately 0.1 mg/m3. Checks of
instrument operation at the lower concentrations verify operation and accuracy at NIOSH and ACGIH action levels. Additional
calibration checks at 0.025 mg/m3 and at 0.010 mg/m3 can be performed on the 431-XE and 431-X mercury analyzers
only. However, these checks are performed upon request only. We do not check the Jerome® 411 at these levels.
Hydrogen Sulfide Calibration and Multi-Level Checks
Each Jerome® hydrogen sulfide analyzer is calibrated at the 0.500 ppm level. As part of the standard calibration, AZI
checks the instrument's operation at three additional concentrations, (approximately) 0.05 ppm, 5.0 ppm, and 25 ppm. These checks
verify operation throughout the instrument's measurement range.
Service
System repair service includes complete upgrade and modification of system components and/or subassemblies to current system
standards. Malfunctioning components are replaced to restore unit to full operation.
A written estimate will be faxed to customers upon examination of returned unit and determination of required repairs. Prior
approval will be requested before replacement of major subassemblies (such as the sensor or printed circuit board). There is a
minimum charge of two (2) hours of labor at $130/hr. for estimates. This estimate fee is waived upon receiving the approval to
proceed with the repair. Shipping is an additional charge.
Service Time
Estimated repair times are two (2) weeks. Confirmation will be sent once units have been received.
Call Arizona Instrument Customer Service at (800) 528-7411 or
(602) 470-1414, or contact Technical
Support to obtain an RMA (return material authorization) number prior to returning the unit for calibration!
Warranty:
90 days parts and factory labor
International Customers:
To return units to Arizona Instrument for repair services:
- Contact AZI Technical Support or International Sales
to obtain an RMA (return authorization number). Please include the model name, serial number, and reason for return in your
correspondence.
- All units are to be shipped C&F Phoenix, AZ, freight prepaid by shipper
- Mark all documentation as "US Goods Being Returned". To limit shipment delays to the USA, please fill out
this form and attach to returned goods.
- Ship to (or Consignee):
Arizona Instrument
Ref: RMA ####
(required)
3375 N. Delaware St.
Chandler, AZ 85225 USA
Notify:
Arizona Customs Broker/AZI
Phoenix, AZ
Tel: (602) 273-0912
- All inbound and outbound freight charges are the responsibility of the customer and will not be paid by Arizona Instrument except if
under warranty. For warranty returns, please contact AZI Customer Service for shipping authorization.
- Confirmation will be sent once units have been received.
- A written estimate will be faxed or e-mailed detailing the repair findings, parts required, return freight charges and total costs.
- Unless prior arrangements have been made, all charges must be prepaid before the units will be returned.