Page 1
ENMET Corporation
PO Box 979
Ann Arbor, MI 48106-0979
www.enmet.com
PPM Formaldemeter™ htV-m
3 Parameter IAQ Monitor
with built-in Memory
Operation Manual
Manual Part Number
80012-020
MCN-471, 01/14/13
Page 2
Table of Contents
1.0 INTRODUCTION................................................................................................................................................................ 1
1.1 U
NPACK
.............................................................................................................................................................................. 1
2.0 FEATURES .......................................................................................................................................................................... 2
2.1 PPM F
2.2 PPM F
ORMALDEMETER™ HTV-M ELEMENTS
ORMALDEMETER™ HTV-M DISPLAY KEY
......................................................................................................................... 2
................................................................................................................... 2
3.0 OPERATION ....................................................................................................................................................................... 3
3.1 P
RINCIPLE OF OPERATION
3.2 I
NTERFERENTS
3.3 U
SING THE FORMALDEMETER™ HT
.................................................................................................................................................................... 3
................................................................................................................................................... 3
V-
M
................................................................................................................................. 4
3.3.1 Taking a Sample .......................................................................................................................................................... 4
3.3.2 Sensor Recovery Period .............................................................................................................................................. 4
4.0 CALIBRATION CHECK AND ADJUSTMENT ............................................................................................................. 5
4.1 T
EMPERATURE & HUMIDITY SENSOR
4.2 T
HE
PPM F
ORMALDEMETER™ HTV-M CALIBRATION STANDARD
................................................................................................................................. 5
......................................................................................... 5
4.2.1 Calibration Check Procedure ..................................................................................................................................... 6
4.2.2 Calibration Adjustment Procedure ............................................................................................................................. 6
4.3 A
DDITIONAL FEATURES
...................................................................................................................................................... 7
4.3.1 Data Retrieval ............................................................................................................................................................. 7
4.3.2 Clearing the Non FRAM Memory .............................................................................................................................. 7
5.0 USING THE FORMALDEMETER™ HTV-M AS A CONTINUOUS MONITOR ........................................................... 8
5.1 S
WITCHING THE FORMALDEMETER™ HTV-M FROM A HANDHELD DEVICE TO A CONTINUOUS MONITOR
5.2 S
TARTING A SCHEDULE
5.3 E
NDING A SCHEDULE
5.4 S
TOP ON FULL MODE
5.5 F
LOW CHART
.................................................................................................................................................................... 10
...................................................................................................................................................... 8
.......................................................................................................................................................... 9
......................................................................................................................................................... 9
. ............................. 8
5.5.1 Schedule Selection.................................................................................................................................................... 11
5.5.2 Mode Selection .......................................................................................................................................................... 11
5.5.3 Limit Selection .......................................................................................................................................................... 11
5.5.4 Alarm Selection ........................................................................................................................................................ 11
5.6 H
OW TO USE DATA MODE WITH YOUR FORMALDEMETER HT
V-
M
........................................................................................ 12
6 TROUBLESHOOTING ....................................................................................................................................................... 13
6.1 D
IAGNOSING THE PROBLEM
6.2 C
HECKING THE GAIN
6.3 P
ERFORMING A FULL RE-SET OF THE INSTRUMENT
.............................................................................................................................................. 13
........................................................................................................................................................ 13
............................................................................................................ 13
7. MAINTAINANCE ............................................................................................................................................................... 14
7.1 C
LEANING THE FORMALDEMETER™ HTV
7.2 S
TORAGE
7.3 I
NSTRUMENT BATTERY -LOW BATTERY INDICATOR
7.4 B
ATTERY REPLACEMENT
.......................................................................................................................................................................... 14
.................................................................................................................................................. 14
-
M
......................................................................................................................... 14
......................................................................................................... 14
8.0 REPLACEMENT PART NUMBERS .............................................................................................................................. 14
8.1 C
ALIBRATION STANDARD AND FILTER REPLACEMENTS
................................................................................................... 14
9.0 WARRANTY ..................................................................................................................................................................... 15
List of Illustrations
F
IGURE 1:
PPM F
ORMALDEMETER™ HTV-M FEATURES
.................................................................................................... 2
Page 3
1.0 Introduction
The PPM Formaldemeter™
htV-m
is a precise 3 parameter indoor air quality monitor suitable for monitoring low level
concentrations of hazardous formaldehyde vapors under extremes of temperature and humidity, in parts per million (ppm) and
mg/m3. Fast and easy to use, pressing a single button gives an immediate indication of concentration levels.
The
htV-m
has a built in non-volatile memory and real time clock. It can be used as a manual hand held device or a continuous
data logger capable of over 7 days (optional) continuous monitoring and thus has the option of being mains or battery powered.
A PC can automate the sampling and logging of data at specific times by a direct USB/RS232 interface or via a wireless
connection. The SPC-2 program can be used to monitor the instrument continuously using the USB/RS232 interface on the
Formaldemeter™
htV-m
.
Please read these instructions carefully and familiarize yourself with the instrument before use. The operating manual will
provide you with all the necessary information for the correct use of your Formaldemeter™
htV-m
.
Please note that PPM Technology Limited shall not be liable for errors that may appear herein or for incidental or consequential
damages in connection with or arising from the use of this material.
N
OTE
: All specifications stated in this manual may change without notice.
1.1 Unpack
Your PPM Formaldemeter™
operation. Immediately upon receipt, please examine the kit contents carefully to ensure that you have received the following
items in good condition.
Kit Contents:
• Formaldemeter™
• Formaldemeter Calibration Standard
• CD Formaldemeter™
• USB Cable
• AC/DC Adapter with Universal Input Plugs
• Vial of phenol filters (10)
• Certificate of Calibration
• Quick sett-up Guide, and Full Operation Manual
htV-m
kit has been packaged carefully and includes all the components necessary for full
htV-m
instrument with stand
htV-m
Downloader Software
Regarding Damaged Shipments
N
OTE
: It is your responsibility to follow these instructions. If they are not followed, the carrier will not honor any claims for
damage.
This shipment was carefully inspected, verified and properly packaged at our company and delivered to the carrier in
good condition.
When it was picked up by the carrier at ENMET, it legally became your company’s property.
If your shipment arrives damaged:
• Keep the items, packing material, and carton “As Is.” Within 5 days of receipt, notify the carrier’s local office and
request immediate inspection of the carton and the contents.
• After the inspection and after you have received written acknowledgment of the damage from the carrier, contact
ENMET Customer Service for return authorization and further instructions. Have your Purchase Order and Sales
Order numbers available.
ENMET either repairs or replaces damaged equipment and invoices the carrier to the extent of the liability coverage,
usually $100.00. Repair or replacement charges above that value are your company’s responsibility.
The shipping company may offer optional insurance coverage. ENMET only insures shipments with the shipping
company when asked to do so in writing by our customer. If you need your shipments insured, please forward a written
request to ENMET Customer Service.
Regarding Shortages
If there are any shortages or questions regarding this shipment, please notify ENMET Customer Service within 5 days of
receipt at the following address:
ENMET Corporation
680 Fairfield Court
Ann Arbor, MI 48108
734-761-1270 734-761-3220 Fax
Page 4
Formaldemeter
Display
Description
htV-m
2.0 Features
ENMET Corporation
2.1 PPM Formaldemeter™
See Figure 1 for location of features:
Feature Description
Display The liquid crystal display (LCD) shows the formaldehyde concentration of the sample in 0.01ppm
Sampling Port The brass sampling port is the inlet through which the sample is drawn into the sensor.
Power Port The DC Power Port gives the option of the instrument to be AC powered.
USB/RS232 Port The USB/RS232 allows direct connection to PC to be used with PPMontitoring software.
Battery Compartment
Keypad Four buttons operate the instrument; some of which have multiple functions.
htV-m
elements
increments. The display also shows messages during certain operations.
The battery compartment is located beneath a cover at the bottom rear of the instrument. To gain
access to the battery, simply remove the cover by unscrewing the two screws. A low battery is
indicated by the display flashing: bAt
The button switches are located beneath the membrane and are operated by pressing firmly where
indicated.
USB/RS232
Figure 1: PPM Formaldemeter™
2.2 PPM Formaldemeter™ htV-m Display Key
- - - -
0.00
run
CAL
Set
bAt
Set CAL
FULL
Schd
Sensor recovering
Sensor ready
Sampling
Taking calibration sample
Set calibration level
Replace battery
Instrument not calibrated
Memory full
Schedule
htV-m
Features
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Formaldemeter
htV-m
ENMET Corporation
3.0 Operation
Unlike other formaldehyde monitoring devices such as color stain tubes and badges, the Formaldemeter™
measuring many samples consecutively without the need for inconvenient ancillary equipment. Being ultra compact and battery
operated, the instrument is truly field portable. It can also be mains powered suitable for continuous monitoring. It can be
connected directly to a manager PC for automation via the USB/RS232 interface.
3.1 Principle of Operation
Electrochemical Formaldehyde Sensor
The Formaldemeter™
formaldehyde in air samples. The instrument contains an electrochemical formaldehyde sensor comprising two noble metal
electrodes and a suitable electrolyte.
When air is drawn into the sensor by means of the internal sampling system, a small voltage is generated which is directly
proportional in magnitude to the concentration of formaldehyde in the sample.
This voltage is produced as a result of the electro-oxidation of formaldehyde at one of the catalytically active electrodes.
The signal is fed to a precision electronic amplifier and output on the instrument’s display, when calibrated, as formaldehyde
concentration in ppm (parts-per-million by volume).
All the electronic systems are based on modern, integrated circuitry employing the latest surface mount technology to ensure
that the Formaldemeter™
htV-m
uses proven electrochemical sensing technology for determining the concentration of
htV-m
is an exceptionally robust and reliable instrument.
3.2 Interferents
Phenol and Resorcinol
The presence of phenol in the air can give a reading on the Formaldemeter™
situations where phenolic resins are used. These fit onto the sampling port of the instrument. The filters will completely
remove phenol from the sample at concentrations in excess of 1000ppm without affecting the formaldehyde concentration.
Alcohols and Aldehydes
As is found with other portable detection equipment, the meter is not totally specific to formaldehyde alone, being susceptible
to a degree of interference from a small range of other chemicals. Other aldehydes and alcohols such as methanol and ethanol in
the atmosphere can cause cross-interference effects.
Sensor Background Reading
Due to the high sensitivity of the sensor: a background reading can often be produced even when sampling in an atmosphere
considered to be free of interference. Background interference can be reduced using the new features on the Formaldemeter™
htV-m
, please contact PPM Technology Ltd for details.
Humidity Extremes
As the sensor is very sensitive, it is possible that extremes of humidity (generally, anything outside 40-60% RH) may cause a
background reading on Formaldemeter instruments. The Formaldemeter™
A list of common chemicals, which can cause interference, is available on request.
htV-m
. When monitoring formaldehyde in
htV-m
is specially designed to reduce the effect.
htV-m
is capable of
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Formaldemeter
htV-m
ENMET Corporation
3.3 Using the Formaldemeter™
The Formaldemeter™
htV-m
, is set to function as a handheld.
htV-m
3.3.1 Taking a Sample
Power On
Press the POWER button once. The display will show - - - Followed by: 0.00
This indicates that the instrument is ready to take a sample.
Power Off
Switch the instrument off by pressing and holding down the ON-OFF button for 3 seconds until display shows
OFF
Then release. A click is heard, your instrument is now off.
Sampling
Turn instrument on; hold the instrument in the atmosphere to be sampled. Press and release the SAMPLE button.
The display will show run
The internal pump should be heard running for a short period as it samples the air.
The display will next flash between the following two screens for 10 seconds
-. - - and 0.00
The display will then show -. - - flashing, as the sample is analyzed. After 60 seconds, the display will show a non-flashing
value, which is held until the instrument is switched off. This indicates the formaldehyde concentration in parts per million
(ppm).
By holding down the button the instrument will show the reading in mg/m3 alternating with the following screen:
Alt=
By holding down the button, the display will show the time taken to reach the displayed concentration in seconds. In the
event that high levels of an interferent is present, the instrument will give a reading in around 10 seconds, to avoid the sample
being affected by the interference.
Alternative Settings
The two durations listed above (10 and 60 seconds), may vary depending on the specifications of the supplier or customer.
These values are the default set by the instruments manufacturer. For further details please contact your local distributor.
3.3.2 Sensor Recovery Period
Between samples, the instrument should be left switched off for a few minutes to allow the sensor to clear of any residual
formaldehyde. As a general rule, the higher the reading obtained, the longer it takes for the sensor to clear.
If the instrument is switched on before the sensor has cleared, the pump will not operate and the display will flash:
- - - -
The cell is clear only when the following display is shown for three seconds without interruption: 0.00
The instrument is now ready to take the next sample.
If the instrument does not clear after approximately 5 minutes, then refer to troubleshooting section of the manual.
3.3.3 Memory Full
Since the
after many samples (minimum 2000) have been taken the memory will become full and the display will show: FULL
This means further samples cannot be taken since the memory is full. The display will continue to show: FULL, until the
memory is downloaded and cleared or the over write option is selected.
The memory is cleared using the download software included in your
Option – Alternatively it is possible to set to over write the oldest sample in the memory with the latest. (See section 5.4 Stop
htV-m
has a built in memory system, every sample taken either manually or continuously will be recorded, eventually
htV-m
kit.
on Full Mode or use the download software to change the settings).
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Formaldemeter
Formaldehyde Calibration Standard
htV-m
ENMET Corporation
4.0 Calibration check and Adjustment
Please read this section thoroughly before attempting to check or adjust calibration. Users are strongly advised to familiarize
themselves with the instrument before attempting to adjust the calibration and should follow the instructions carefully.
General Information
Sensor sensitivity can change very gradually with time; so periodic recalibration may be required. It is advisable to check
calibration regularly to ensure that the instrument is functioning correctly.
A quick calibration check can be carried out by drawing a formaldehyde vapor sample of known concentration into the
instrument’s sensor and noting whether the displayed reading agrees with the expected concentration value.
The PPM Formaldemeter™
thermometer essential for calibrating the instrument.
It is recommended that calibration check or adjustment be carried out at the approximate operational temperature.
4.1 Temperature & Humidity Sensor
htV-m
-m is supplied complete with a formaldehyde calibration standard and has a built in
This End
1. Hold down the SAMPLE button and press the ON-OFF button once. Release the SAMPLE button.
2. The Instrument will briefly display: HEAt
3. The instrument will then show the temperature reading in oC, followed by: oC
4. The instrument will then display the humidity (in % RH), followed by: %rH
5. The instrument will cycle through these four screens until it is either switched off manually, or it will switch itself off after
30 seconds.
The Sensor used for the temperature and humidity readings is accurate to within ±3.0 %Rh for humidity, and ±0.4 oC for
temperature, within the operational limits for the instrument. To ensure the accuracy of the instrument the temperature &
humidity sensor is replaced with the instruments annual service.
4.2 The PPM Formaldemeter™ htV-m Calibration Standard
The PPM Formaldehyde Calibration Standard consists of formaldehyde absorbed on a substrate in a glass tube from which a
headspace vapor sample can be drawn. Each standard is carefully manufactured to a high tolerance.
Effect of Temperature
The concentration of formaldehyde vapor generated in the calibration standard varies with temperature and for this reason, the
instrument has a built in thermometer and a temperature / concentration table is supplied.
Due to the effect of body temperature, handle the calibration standard only by the yellow end caps, to ensure temperature
equilibrium.
Temperature Equilibrium
The calibration standard should always be allowed to stabilize within the recommended temperature range of 15-29°C for at
least 1 hour before use.
Calibration Standard Expiration
Each calibration standard may be used for a maximum of 6 months (as indicated by the given expiry date), or a maximum of
100 samples. New calibration standards can be ordered from ENMET Corporation. See Section 8.4 for reorder part numbers.
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Formaldemeter
htV-m
ENMET Corporation
4.2.1 Calibration Check Procedure
Place the instrument and calibration standard together in a place where the temperature is stable for at least one hour before
commencing the calibration check to allow thermal equilibration.
Before carrying out a calibration check, the sensor must be clear of formaldehyde vapor from any previous samples. The
Temperature sensor must be read (as described earlier) and a note taken as this is vital for the calibration procedure.
Procedure
1. Place the calibration standard and the instrument on a work surface. Handle the calibration standard as little as possible
to avoid heating the tube, holding it by the yellow caps. Remove both end plugs.
2. Switch the instrument on by pressing the ON-OFF button once. Wait for the display to show: 0.00
3. Insert the nozzle into the sampling end of the tube. Ensure a good seal around the instrument nozzle by pushing the
calibration standard tube firmly against the instrument when taking a sample.
4. Press the SAMPLE button and wait until the internal sampling pump stops before removing the standard from the
instrument. Replace the end plugs in the calibration standard securely.
5. The display will flash between the following two screens for 10 seconds: -. - - and 0.00
6. The display will then show a flashing, -.- - as the sample is analyzed. After 60 seconds, the display will show a non-
flashing value, which is held until the instrument is switched off. This indicates the formaldehyde concentration in ppm.
7. Refer to the Temperature/Concentration look-up table on the standard tube. If the reading is within 5% of the value
shown in the table, then no re-calibration is required.
8. If re-calibration is required, follow the calibration adjustment procedure that follows.
Leave the instrument switched off for approximately 5 minutes to recover before commencing another calibration check,
adjustment or taking a sample.
4.2.2 Calibration Adjustment Procedure
Please read this section thoroughly before attempting to check or adjust calibration. Users are strongly advised to familiarize
themselves with the instrument before attempting to adjust the calibration and should follow the instructions carefully.
Under normal operating conditions, instrument calibration should require only minimal periodic adjustment. To see whether a
full recalibration is required, perform a calibration check first. Leave the instrument and calibration standard in a room where
the temperature is constant for at least one hour before calibrating to allow thermal equilibration.
Procedure
1. Place the instrument and calibration standard on a work surface
2. Handle the calibration standard only by the yellow end caps.
3. Press the ON-OFF button to switch the instrument on.
4. Wait for the display to show: 0.00
5. Remove the yellow plugs from both ends of the calibration standard.
6. Insert the instrument nozzle into the sampling end of the calibration standard. To maintain airtight contact between the
nozzle and the standard, push the standard firmly against the instrument.
7. Simultaneously depress and release both Cal ▲ and ▼ buttons.
8. The pump will be heard drawing a vapor sample and the screen will briefly show: CAL
9. When the pump stops, remove the calibration tube and replace both yellow end plugs.
10. The display will show an increasing, flashing value for 60 seconds, followed by: SEt 1.750
11. Read the temperature noted down recently and determine the required concentration reading from the lookup table on
the calibration standard, for example:
Temperature: 21°C
Reading: 2.13 ppm
12. Now use the Cal ▲ and Cal ▼buttons to adjust the display reading to the required concentration.
13. Press the SAMPLE button to store this calibration value.
The display will show: CAL
Followed by: End
The Formaldemeter™
htV-m
will then switch off automatically. The instrument has now been recalibrated.
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Formaldemeter
htV-m
ENMET Corporation
4.3 Additional Features
4.3.1 Data Retrieval
This function enables the user to view the last 10 manual samples. Use the download software to retrieve all data required.
Accessing the Data
1. Hold down the SAMPLE button and press the ON-OFF button once. Release the SAMPLE button.
2. The Instrument will briefly display: HEAt
The instrument will then flash between displaying the following two screens: Temperature reading and °C
3. Once the instrument is in this mode press the Cal ▲ and Cal ▼ buttons at the same time and release. The display will briefly
show: dAtA
4. The display will then flash between the following two screens (as an example): run0 and 0.08
The first screen indicates which previous sample is being displayed, the most recent first,
from run0 (most recent), to run9 (the oldest).
Use the Cal▲ and ▼ buttons to move to the desired sample reading.
By pressing the SAMPLE button when viewing a reading,
the instrument will display the reading in mg/m3, as shown below:
ALt0 and 0.56
Press the ON-OFF button when done to turn the instrument off.
4.3.2 Clearing the Non FRAM Memory
As with the older
to log the last 10 samples as well as the FRAM memory.
While viewing the data, hold down both the Cal (▲ and ▼) buttons at the same time,
until the display has run through all the following screens:
The non-FRAM memory will now be clear.
htV
model, the
htV-m
has sufficient memory capacity
CLr3 CLr2 CLr1 CLr0 [ ]
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Formaldemeter
htV-m
ENMET Corporation
5.0 Using the Formaldemeter™
The built in memory and real time clock enables the instrument to log all 3 parameters at corresponding times, allowing
improved monitoring and analysis opportunities. A schedule must be set up using the download software enclosed in order for
continuous monitoring.
Real Time Clock
The Real Time clock is an internal clock, which can only be set up and viewed via a USB/RS232 link and using the download
software program. The clock cannot be displayed on the Formaldemeter™
Schedule Mode
In order for continuous monitoring to take place a Schedule must be set up. A schedule allows the user to control every aspect
of the monitoring e.g. set start time, how often you want to sample, for how long and on which days.
A schedule can only be set up via a PC using the download program software and USB/RS232 port to transfer the information
to the Formaldemeter™. However, once a schedule has been programmed into the instrument, it can be started at any time
without a PC being present.
5.1 Switching the Formaldemeter™
Press POWER, SAMPLE and CAL at the same time, the screen will display:
ConF
briefly, followed by
Press the arrow key CAL to change to
Schy
Press SAMPLE to select.
If a schedule has been set in the memory using the download software programme, the schedule has now been activated.
which means Schedule YES
Schn
which means Schedule NO
htv-m
as a Continuous Monitor
htV-m
screen. It is used internally.
htV-m
from a Handheld Device to a Continuous Monitor.
5.2 Starting a Schedule
Switching the
0.00 until the set schedule begins as previously set by a PC.
Then run will be displayed when the schedule is set to take a sample.
Then Schd flashes intermittently with . . .
Until the instrument has finished analyzing the sample. The sample reading will then be displayed until the next scheduled
sample. During continuous sampling the display will show Schd flashing intermittently with the previous stored reading.
The schedule has now been set up and is running.
Once a schedule is running, all buttons on the Formaldemeter™
If no schedule has been set up on a PC, using the specialist software, the Default Schedule will run. The Default Schedule is set
to sample continuously for as long as the instrument is turned on, at intervals of every 2 minutes.
The instrument can be scheduled to sample as often as required: as soon as the instrument has cleared after taking the previous
sample; once a minute; once an hour and / or anything in between.
htV-m
on again, after activating a schedule (as done above), this will start the schedule. The screen will display:
htV-m
are disabled apart from the POWER button.
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Formaldemeter
htV-m
ENMET Corporation
5.3 Ending a Schedule
If a schedule is running the instrument must be turned off first, then turned on again by pressing:
POWER, SAMPLE and CAL ▲ at the same time, the screen will display:
ConF briefly, followed by
Schy which means Schedule YES
Press arrows to select Schn which means Schedule NO
Press the SAMPLE button to select then hold down the POWER button.
Schedule Mode is now off.
5.4 Stop On Full Mode
If Stop On Full Mode is on, and the internal FRAM
If Stop On Full Mode is off, and the internal FRAM
readings.
Either mode may be selected by pressing:
POWER, SAMPLE and CAL ▲ at the same time, screen will display:
ConF briefly, followed by:
Sch Y or Sch n
Select the required setting by pressing SAMPLE to confirm choice. The display will now show:
SoF Y Stop On Full Yes or SoF n Stop On Full No
Use arrow keys to navigate between the two settings pressing SAMPLE to select the required option.
When the FRAM memory is full the message FULL is shown when the instrument is turned on and if a sample is taken. If Stop
On Full Yes is set, then sampling is prohibited when memory is full.
Various Instrument Modes, Limits and the Optional Alarms may also be set up in a similar way see detailed flow chart that
follows.
htV-m
memory is full, the
htV-m
memory is full, the oldest readings will be overwritten by the newest
htV-m
will not sample until memory is cleared.
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Formaldemeter
▼
▼
▼
▼
▼
▼
▼
▼
L
10.0
▼
▼
▼
▼
▼
5.5 Flow Chart
htV-m
ENMET Corporation
PPM Formaldemeter
Press POWER, SAMPLE & CAL ▲ at the same to enter the menu.
Press SAMPLE to confirm your selection and to continue on to the next step. CAL ▲ & ▼ allow you to navigate and adjust
the settings.
Once option has been selected and you do not want to change any ore settings you may hold down the POWER button to
switch off. Your settings will have been saved.
Default Settings are Underlined.
Enter Configuration menu
Alarm duration in seconds
Alarm Duration in seconds
Alarm if ‘Lower than’ or Alarm if ‘Greater
htv-m
ConF
ALrS 0.10
ALrd 10
▼
ALrL ALrG
than’ the setting
S=t S=P S=A
Instrument Mode (Time, Peak or Area)
Schy Schn
Schedule enable
SoFy SoFn
Stop on Full memory
SbSy SbSn
Short between Samples
ALry ALrn
Alarm module enable
Lt= 1 Lt-2 Lt=3 Lt=4
Clearing Limits
PGtn
Do not change this setting.
Area Integration (low)
H 60.0 Area Integration (high)
1n=Y 1n=n
Inverted integration enable
GtnY GtNt 3.5 GtnP
Do not change these settings.
A2t=Y A2t=n
‘T Greater than A’ Gate enable
Art=Y Art=n
‘Rising in Area’ Gate enable
[ ]
End of Configuration menu.
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Formaldemeter
htV-m
ENMET Corporation
5.5.1 Schedule Selection
• Schedule Yes – The user wishes to start a schedule (for using Formaldemeter™
htV-m
as a continuous monitor).
• Schedule No – The user does not wish to start a schedule (for using the Formaldemeter™
Stop On Full Selection
See earlier section 5.4 for more detailed information.
htV-m
as a handheld device)
5.5.2 Mode Selection
• Time Mode – The sample value is given at the calibration time to peak. For further details contact ENMET Corporation.
• Peak Mode – The sample value is given at the highest sensor output.
For further details contact PPM Technology.
• Area Mode - This is the Default Setting. The sample value given is at the higher area-time limit.
5.5.3 Limit Selection
This mode governs how quickly the instrument takes to clear before another sample can be taken. The default limit for the
Formaldemeter
take another sample.
To change Limit, the
page.
• Limit 1 (Lt=1) The normal Formaldemeter
• Limit 2 (Lt=2) The normal Glutaraldemeter mode (do not use on
• Limit 3 (Lt=3) The medium concentration Formaldemeter™
in atmospheres where the concentration of formaldehyde is often well over 2ppm, it is advised to change the limit to 3. This
will allow the user to sample at more regular intervals. Please note that when using limit 3, the readings at very low
concentration are less accurate, due to the fact that some residual formaldehyde from the previous sample may still be present in
the sensor.
htV-m
is Lt =1 , which means that the fuel cell must be very stable before the instrument allows the user to
htV-m
must first be RE-SET (see section 6.3), before following the Flow Chart instructions on previous
htV-m
mode.
htV-m
).
htV-m
mode. If the Formaldemeter™
htV-m
is used regularly
• Limit 4 (Lt=4) The high ppm Formaldemeter
Please contact the manufacturers regarding this limit as changing the limit to 4 require additional changes to settings.
htV-m
mode.
5.5.4 Alarm Selection
• Alarm Yes – The user wishes to set alarms.
• Alarm No – The user does not want to set alarms.
• Alarm Greater Than – The alarm will sound if the reading is higher than the set threshold.
• Alarm Less Than – The alarm will sound if reading is lower than the set threshold.
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Formaldemeter
htV-m
ENMET Corporation
5.6 How to use Data Mode with your Formaldemeter
Note Read and understand this section if you do not intend to use the PPM download software that was supplied with your kit.
If you intend using the PPM download software please ignore this section and read the help file/manual supplied with the CD.
You will need a PC with a USB/RS232 port; your
1. Connect the
if you only have one then this is probably called “COM 1” – using the Device Manager tool will help. If in doubt then seek
the advice of your computer administrator.
2. Once the instrument has been connected enter the Operation Settings menu by holding down all three buttons at the same
time as turning the instrument on – release all the buttons and then use the sample button to scroll through the entries until
you get to 232 options which you must set to read 232Y. Press sample again to save your choice and the next item should be
dAt..... this needs to be set to dAtY in order to enable the Data Mode.
3. Pressing sample will save you choice and turn the instrument off as this is the last item.
Hyper Terminal
In order to receive the downloaded data you will need a piece of software known as a Terminal Emulator or Serial Capture –
there are many available applications such as ProComm, WinComm & Minicom. However, most Windows installations come
with a Terminal Emulator preinstalled called HyperTerminal. It can be found on the Start menu under Accessories >
Communications > HyperTerminal..
Creating a new connection
Start the application and you will be prompted to enter a description for a new connection. Enter a useful name for the
new connection we're about to create – something like 'htvMData' – and the click on OK.. You will now be prompted
to select the connection type – from the dropdown list select the COM port connected to the instrument to and press OK.
You'll then be prompted for the connection properties for the connection – select a baud rate of 9600; 8 data bits; one stop bit
and no parity or flow control:
Click on OK to open the connection. You may optionally alter some of the more advanced settings for the connection. Use the
button at the top of the screen to disconnect before opening the Properties box and selecting the ASCII Setup button. Adjust the
settings so that there is a tick in each of the boxes.
Close all the property boxes and save the connection for use later on. In future you will find a new submenu in the Start menu
which contains all the previously saved connections: Accessories > Communication > HyperTerminal >.
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instrument to the PC port using the cable – you will need to know the port number you have connected, to
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and the USB or RS232 cable.
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Connecting to the
If you have previously created a connection for the
open HyperTerminal; cancelling the initial dialogue and then using the File menu to open your connection. If HyperTerminal
does not open the connection for you (check for a timer in the status bar) then you can click on the Call button at the top of the
screen to connect to your instrument.
Typing a single X into the screen will start the memory download – soon you will see the screen fill up with data. Type any
character into the screen to stop the transfer.
Saving Data to a File
HyperTerminal has the facility to save the downloaded data directly into a file – to use this make sure that any transfer has been
stopped and select Transfer > Capture Text... from the menu. This will bring up a dialogue where you may enter a file name to
save the data to – edit the path and file name to suit your system but ensure that you use a CSV extension as this will allow the
data file to be opened directly by applications that support the CSV data format. Click on Start to open the file and to return to
the main screen. Once there type in an X to start the transfer – which will be placed into the file. Once the transfer is over click
through to Transfer > Capture Text > Stop menu to close the file and save your data. You may now open the file you specified
in, for example, a spreadsheet package such as Excel or OpenOfficeCalc.
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htV-m
and saved it then you may click either select it from the Start menu or
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Formaldemeter
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ENMET Corporation
6 Troubleshooting
6.1 Diagnosing the problem
' -- -- -- -- ' flashes on display and the instrument will not sample.
The three main reasons for this problem are:
1. The instrument has been accidentally calibrated when no calibration standard was present.
2. The calibration standard used for calibration has expired.
3. The instrument has been damaged and will need to be repaired.
To determine which of the reasons applies to your case follow the procedures shown below
(Note - quoted values are for tests performed at 25oC):
1. Make sure that the instrument has been turned off for about 5-minutes.
2. Hold down the Left-hand calibration button whilst turning the
3. tESt will appear on the display. Release all the buttons.
4. A four-digit value will appear ( #.### ). Give the
5. Note the initial value and an approximate rate of change over a minute. If the initial value or the rate of change is over 0.300
then it is likely that your sensor has been damaged - contact ENMET Corporation for further details.
If the readings look OK then continue with the
1. With the sample nozzle inserted into a valid calibration standard take a sample.
2. The display should be set to 0.000 as the pump starts to run and then rise up to a maximum as the sample is drawn in.
3. Press and hold the Left-hand calibration button - the display will show a time value (t #.#). Make a note of this.
4. Press and hold the Right-hand calibration button - the display will show the peak value. Make a note of this too.
5. Turn the instrument off. Leave the instrument off for 5-minutes before repeating the tests.
If the peak value is less than 5.000 or has a time value less than 5 seconds then there may be problem with the sampling system
or your sensor. Contact ENMET Corporation for further details.
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a few seconds to stabilize.
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still in the tESt mode:
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on.
6.2 Checking the Gain
1. Make sure that the instrument is turned off.
2. Hold down the Right-hand calibration button whilst turning the instrument on.
3. GA1n will appear on the display. Release all the buttons.
4. A four-digit value will alternate with a two-digit exponent on the screen: (#### 1E: ##)
5. Note both numbers. The instrument will power down after a few seconds.
If the Exponent value is between 1E:15 and 1E:13 then you may have used an expired standard - check your standard expiry
date and re-read Section 4.4 on how to calibrate the instrument. When you are ready carry out a RE-SET, as described below,
and recalibrate the instrument.
If the Exponent value is less than 1E:13 then you may have accidentally calibrated without a calibration standard being present.
Carry out a RE-SET as described below.
6.3 Performing a full re-set of the instrument
Make sure that you have a valid calibration standard to hand before performing this procedure as your current calibration will
be deleted, and there is no way of 'undoing' the RE-SET procedure once it has been performed.
1. Make sure that the instrument is turned off.
2. Hold down both Cal (▲ and ▼) buttons whilst turning the instrument on.
3. rSEt will appear on the display. Release all the buttons.
4. -no- will appear on the display. Change the -no- to a YES by pressing Cal ▲. To complete the re-set press the SAMPLE
button.
5. rSEt will appear on the display.
6. SEt CAL will now appear on the display followed by the normal 0.00 display. Switch the instrument off and then back to
calibrate.
If, after a re-set, you are still experiencing problems then contact ENMET Corporation to arrange a service.
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ENMET Corporation
7. MAINTAINANCE
With the exception of the battery, your PPM Formaldemeter™
no attempt is made to open the instrument other than to replace the battery. Any evidence of tampering with the instrument will
invalidate the warranty.
If you find that your instrument requires service or repair, please return it to ENMET Corporation. See Section 9.0 for warranty
information and return instructions.
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has no user serviceable components. It is important that
7.1 Cleaning the Formaldemeter™
On no account should the Formaldemeter™
sensor and the electronic circuitry.
If the instrument’s enclosure requires cleaning, it should be wiped with a damp cloth. Never use abrasive or solvent based
cleaning agents.
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be immersed in liquid. Any fluid entering the instrument will destroy the
7.2 Storage
When not in use, your Formaldemeter™
away from extremes of temperature.
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should be stored in the supplied carrying case in a clean, dry environment and
7.3 Instrument Battery -Low battery indicator
When the battery voltage becomes too low, and the battery needs replacing the display will flash: bAt
7.4 Battery Replacement
The instrument requires a 9V PP3 type alkaline battery.
To replace the battery, simply remove the battery compartment cover at the bottom rear of the instrument by unscrewing the
two screws and place the battery in the compartment.
8.0 Replacement Part Numbers
8.1 Calibration Standard and Filter Replacements
ENMET Corporation replacement part numbers
Calibration Standard, Formaldehyde 02700-001
Filter, phenol (pack/10) 02700-002
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ENMET Corporation
9.0 WARRANTY
ENMET warrants new instruments to be free from defects in workmanship and material under normal use for a period of one
year from date of shipment from ENMET. The warranty covers both parts and labor excluding instrument calibration and
expendable parts such as calibration gas, filters, batteries, etc... Equipment believed to be defective should be returned to
ENMET within the warranty period (transportation prepaid) for inspection. If the evaluation by ENMET confirms that the
product is defective, it will be repaired or replaced at no charge, within the stated limitations, and returned prepaid to any
location in the United States by the most economical means, e.g. Surface UPS/FedEx Ground. If an expedient means of
transportation is requested during the warranty period, the customer is responsible for the difference between the most
economical means and the expedient mode. ENMET shall not be liable for any loss or damage caused by the improper use of
the product. The purchaser indemnifies and saves harmless the company with respect to any loss or damages that may arise
through the use by the purchaser or others of this equipment.
This warranty is expressly given in lieu of all other warranties, either expressed or implied, including that of merchantability,
and all other obligations or liabilities of ENMET which may arise in connection with this equipment. ENMET neither assumes
nor authorizes any representative or other person to assume for it any obligation or liability other than that which is set forth
herein.
NOTE: When returning an instrument to the factory for service:
Be sure to include paperwork.
A purchase order, return address and telephone number will assist in the expedient repair and return of your unit.
Include any specific instructions.
For warranty service, include date of purchase
If you require an estimate, please contact ENMET Corporation.
There are Return for Repair Instructions and Form on the last pages of this manual. This Form can be copied or used as needed.
Manual Part Number
80012-020
June 2010
MCN-463, 05/11/12
MCN-471, 01/14/13
Notes:
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PO Box 979
680 Fairfield Court
Ann Arbor, Michigan 48106-0979
734.761.1270 Fax 734.761.3220
Returning an Instrument for Repair
ENMET instruments may be returned to the factory or any one of our Field Service Centers for regular repair
service or calibration. The ENMET Repair Department and Field Service Centers also perform warranty
service work.
When returning an instrument to the factory or service center for service, paperwork must be included which
contains the following information:
A purchase order number or reference number.
A contact name with return address, telephone and fax numbers
Specific instructions regarding desired service or description
of the problems being encountered.
Date of original purchase and copy of packing slip or invoice
for warranty consideration.
If a price estimate is required, please note it accordingly and be
sure to include a fax number.
Providing the above information assists in the expedient repair and return of your unit.
Failure to provide this information can result in processing delays.
ENMET charges a one hour minimum billing for all approved repairs with additional time billed to the closest
tenth of an hour. All instruments sent to ENMET are subject to a minimum evaluation fee, even if returned
unrepaired. Unclaimed instruments that ENMET has received without appropriate paperwork or attempts to
advise repair costs that have been unanswered, after a period of 60 days, may be disposed of or returned
unrepaired COD with the evaluation fee.
Service centers may have different rates or terms. Be sure to contact them for this information.
Repaired instruments are returned by UPS/FedEx Ground and are not insured unless otherwise
specified. If expedited shipping methods or insurance is required, it must be stated in your paperwork.
Note: Warranty of customer installed components.
If a component is purchased and installed in the field, and fails within the warranty term, it can be
returned to ENMET and will be replaced, free of charge, per ENMET’s returned goods procedure.
If the entire instrument is returned to ENMET Corporation with the defective item installed, the item will
be replaced at no cost, but the instrument will be subject to labor charges at half of the standard rate.
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Mailing Address:
Shipping Address:
Repair Return Form
ENMET Corporation
PO Box 979
Ann Arbor, Michigan 48106
Phone Number: 734.761.1270
FAX Number: 734.761.3220
Your Mailing Address:
Contact Name: __________________________ Your Phone: _______________________
Your PO/Reference Number: _______________ Your FAX: _______________________
ENMET Corporation
Attn: Repair Department
680 Fairfield Court
Ann Arbor, Michigan 48108
Your Shipping Address:
Payment Terms: K COD
(Check one) K VISA / MasterCard______________________ ________ ________
Card number Expiration Card Code
K American Express______________________ ________ ________
Card number Expiration Card Code
Name as it appears on the credit card___________________________________
Return Shipping Method:
K UPS: K Ground K 3 Day Select K Next Day Air K ND Air Saver K 2-Day Air
K UPS Account number: ________________________
K Federal Express: K Ground K Express Saver K P-1 K Standard K 2-Day Air
K FedEx Account number: ________________________
Would you like ENMET to insure the return shipment?
K No K Yes Insurance Amount: $_________________
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