Sensit HCN, HCN CO Instruction Manual

INSTRUCTION MANUAL

®

SENSIT

Hydrogen Cyanide Analyzer

For Models SENSIT HCN
and SENSIT HCN CO

Read and understand
instructions before use.

HCN

Warning: To prevent ignition of ammable
or combustible atmospheres, disconnect
power before servicing.

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FOR YOUR SAFETY

NOTICE: ⚠ CAUTION: This safety symbol is used to

indicate a potentially hazardous situation which, if not
avoided, may result in minor or moderate injury.

⚠ Warning: To prevent the risk of ignition of ammable

atmospheres, batteries must only be changed in an area known
to be non-hazardous.

⚠ Warning: To prevent ignition of ammable or combustible

atmospheres, disconnect power before servicing.

Do not mix batteries of different age or type.

HYDROGEN CYANIDE EXPOSURE
STANDARDS AND HEALTH EFFECT CHART

Hydrogen Cyanide can cause rapid death due to metabolic asphyxiation.

LEVEL EFFECT

4.7ppm NIOSH recommended exposure limit (REL)
10ppm OSHA permissible exposure limit (PEL)
135ppm Death after 30 minutes exposure
181ppm Death after 10 minutes exposure
270ppm Death after 6-8 minutes exposure

3,404ppm Death after 1 minute exposure

ppm = parts per million Recent study estimations (Hathaway et al. 1991)

5.6% HCN lower ammable limits in air (percent by volume)

40.0% upper ammable limits in air (percent by volume)

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CONTENTS

Preparation

For Your Safety .............................................................. ii

Contents .................................................................... 3-4

Parts and Accessories ...................................................5

General Description .......................................................6

Product Specications ...................................................7

Product Features ..................................................... 8-10

Basic Operation

Battery Installation/Replacement .................................11

Operation and Use ................................................ 12-14

Calibration Check ........................................................15

User Menu and Detailed Operation

User Menu / Function Descriptions .............................16

Printing to Optional IR Printer ......................................17

Power Off - Automatic Shut-Off ...................................18

Set Clock .....................................................................19

Show A Calibration Log ...............................................20

Show A Session Log ....................................................21

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CONTENTS

Test and Calibration

Bump Test ....................................................................22

Smart-Cal ....................................................................23

Preparing For Calibration ...................................... 24-25

Hydrogen Cyanide (HCN) Calibration .........................25

Carbon Monoxide Calibration ......................................26

Warranty .......................................................Back Cover

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PARTS AND ACCESSORIES

Standard Accessories (Included)

872-00001 Hard Carrying Case
883-00023 Hot Air Probe (Flue Gase)
873-00005 Dirt and Water/Particle Filter
750-00015 Instruction Manual
310-00004 3”C” Alkaline Batteries
873-00017 External Hydophobic Filter Assembly

Optional Accessories and Standard Replacement Parts

873-00008 Replacement Dirt and Water Filter Assembly
870-00004 IR Printer
870-00039 IR Link Interface w/ SmartLink Software
914-00000-01 Smart-Cal Automatic Calibration Station

Calibration Kits

Contact us with instrument model number for correct Calibration Kit.

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GENERAL DESCRIPTION

The SENSIT® HCN is an advanced state-of-the-art Hydrogen Cyanide
(HCN) gas analyzer designed to provide part per million readings from
0-100ppm.

The SENSIT® HCN is capable of performing ambient as well as hot or
smoldering air samples with its hot air probe and powerful rotary vane
pump.

The SENSIT® HCN is equipped with an advanced long life electrochemical
sensor that can be eld calibrated and has a low replacement cost. A
renewable lter eliminates cross sensitivity to many gases.

The SENSIT® HCN may also be used as a personal monitor. There
is an alarm at 5ppm. The display must be in view to determine gas
concentrations.

The SENSIT® HCN may be equipped with an optional carbon monoxide
sensor (CO) to simultaneously monitor from 0-2000ppm CO

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SPECIFICATIONS

PRODUCT SPECIFICATIONS

Power Supply: 3 “C” Alkaline Batteries

Sensor: Long Life Electrochemical

Range: 0-100ppm HCN 0-2000ppm CO*

Alarm: Preset 5 ppm HCN Preset 50 ppm CO*

Alarm Range: 1-10 ppm HCN 1-300 ppm CO*

Warm Up: Approx. 1 Minute

Response Time: 90% of reading < 60 sec.

Duty Cycle: 60 Minutes

Battery Life: Approx. 30 Hours

Size: 3.5” x 12” x 1.6” (89 x 305 x 40 mm)

Weight: 1.1 lbs. (500 g)

Probe Length: 9 Inches

Tube Length: 5 Feet

Hot Air Probe: 700° F (371.11 celsius) @ 5 Minutes

*Optional

7WA6

Approved UL913, For Class 1, Division 1, Groups C & D
hazardous locations when used with alkaline or NiMH batteries.

Warning: To prevent ignition of ammable or combustible atmospheres,
disconnect power before servicing.

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PRODUCT FEATURES

WATER / DIRT FILTER

HOT AIR PROBE

INFRARED COMMUNICATIONS

BACKLIT LCD DISPLAY

ALARM LED

OPERATION BUTTONS

BATTERY COMPARTMENT

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PRODUCT FEATURES

SENSIT® HCN instrument is constructed of high impact ABS plastic to
withstand the rigors of eld use.

Incorporated in the hand grip area is the battery compartment. SENSIT®
HCN requires 3 “C” type alkaline batteries. Duracell MN 1400BK provide
approximately 30 hours of use.

The alarm can be easily heard with the speaker located in the back of
the instrument.

An infrared Port is located on the right side to allow the SENSIT® HCN
instrument to download calibration data and readings the operator has
elected to save to the instrument’s on-board memory.

A two line display continually updates gas concentrations and internal
functions such as air ow block and battery power. LEDs below the
display indicate READY or ALARM conditions.

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PRODUCT FEATURES

There are 3 operational button pads on the front of the SENSIT® HCN
instrument.

BUTTON (A) POWER/MUTE

operates power and mute features.

BUTTON (B) MENU

Operates a user menu to calibrate, download and set the clock.

BUTTON (C) SAVE/ZERO

Activates the save feature and performs a manual zeroing of the
sensors.

Pressing any button will produce a click sound.

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BATTERY INSTALLATION/REPLACEMENT

Battery replacement is necessary when the display reads BAT LOW,
an audible alarm sounds and the green ready LED ashes. When BAT
LOW is displayed, the instrument has approximately 30 minutes of
useful operation time prior to shut off.

⚠ CAUTION: Always change batteries in an environment free of

combustible gases.

Remove the battery sleeve cover by depressing the locking tab on the
front of the handle with a coin or at object and pulling the handle away
from the top or display area of the instrument.

Place 3 approved batteries into the battery holder. For best results hold
the battery compartment so that it lays in your right hand. With your
left hand install the battery that goes toward the front rst. The battery
that is in contact with the rear spring second and nally insert the third
battery in the center by forcing the second battery such that the spring
compresses and allows the batteries to go into place. If you do not
use your right hand to hold the bottom of the battery compartment the
batteries can come out.

Observe the polarity markings on the inside of the battery holder.
Improper installation will cause the instrument not to operate. Replace
the battery sleeve and allow the locking tab to snap into position.

Check to be sure the handle is secure to the instrument body by gently
pulling the handle away. The handle will remain rmly in place if a proper
connection is made.

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OPERATION AND USE

⚠ CAUTION: Always start your SENSIT® HCN in a gas free

environment to insure a proper zero.

1. Push the POWER/MUTE BUTTON (A). A beep will be heard during

any button activation.

2. If the display fails to illuminate or “BAT LOW” is shown on the display,
replace or recharge the batteries. There is room in the carrying case to
keep an extra set of alkaline batteries.

3. Upon successful start-up, the pump will start and the display will
illuminate. The instrument will then display:

a. Product name and software version.

b. System check for proper pump and battery operation.

c. Date and time.

d. Serial Number.

e. Display “CAL PAST DUE” only when calibration is overdue.

f. Warm-up countdown for 10 seconds.

g. Display “AUTOZERO” indicating the zeroing of all sensors.

h. Any sensor that is completely inoperable during start up will be

indicated by “FAIL” on the display in the location where

readings would normally be located. The GREEN READY LIGHT

will not illuminate indicating the instrument requires service.

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OPERATION AND USE

4. Prior to use, use your nger to block the inlet of the instrument for 4-5
seconds. The display will read “FLOW BLOCKED” if all seals are intact.
During pump ow block, a beep will occur every 2 seconds until the
pump restarts and adequate ow is present.

⚠ CAUTION: Always operate this instrument with Filter Kit or the

High Temperature Probe installed. This will prevent water or debris
from damaging the internal pump.

5. When testing areas with elevated temperatures always attach

the optional hot air probe assembly. Attach the probe by twisting the
connector of the probe onto the matching adapter at the end of the
instrument

These connections need only be nger tight. It is necessary to use a
particle lter when performing ue testing. The use of an unapproved
probe assembly may void the warranty.

⚠ CAUTION: Do not handle the steel portion of any hot air probe

after use as burns may occur!

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OPERATION AND USE

6. To disable the audible alarm press and release the POWER/MUTE (A)
button. To enable the alarm press the POWER/MUTE (A) button again.

7. At any time the operator may save the readings on the display by
pressing the SAVE/ZERO (C) button. This will save all readings for
download at a later time. The memory is factory set to store 6 events.
This can be adjusted from 1-100 at the factory. The most recent save is
rst during download.

8. Following department procedures move to the areas where gas
readings are suspected or must be tested. Use necessary accessories
to draw samples from areas not accessible with the instrument itself,
such as conned spaces. During sampling the respective readings may
change. Audible and visual alarms will activate when the preset limits
are reached.

9. To save any displayed readings, press and release the SAVE/ZERO
BUTTON (C). The data saved can be viewed or downloaded later.
Printouts are possible using the optional IR printer. See Menu operation
for complete instructions.

10. When being used in dark areas an automatic backlight will illuminate
the display.

11. To turn instrument off, push and hold the POWER/MUTE (A) button
for 5-6 seconds until “POWER DOWN” appears on the display.

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CALIBRATION CHECK

To verify the accuracy of SENSIT® HCN, it must be exposed to a known
concentration of test gas that will test any sensor combination included in
your particular model. Any sensor that does not meet the specications
listed in this manual may require calibration or repair. A calibration check
does not update the calibration due date. Full calibration is required to
update these times.

A calibration past due message will be displayed during warm-up if
calibration has not been performed per your company specied interval.
Anytime it is suspected the SENSIT® HCN is not working properly,
check calibration.

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USER MENU

The SENSIT® HCN has several user adjustable features in the USER
MENU. These include:

PRINT MENU:

CALIBRATION:

POWER OFF:

SET CLOCK:

SHOW CAL LOG:

SHOW SES LOG:

Printing session, calibration, Bar Hole Test logs and
accessing Smart-Cal Automatic Calibration Station.

Calibrate HCN and/or CO and access Smart-Cal
Automatic Calibration Station.

Set the automatic shut off timer in minutes.

Set date and time.

Display last calibration of all gasses.

Display saved gas reading data with date
and time.

BUMP TEST:

SMART-CAL:

O2 TEST:

Perform automatic test for response to minimum
of 80% of calibrated gas value within 45 seconds.

Access automatic calibration station.

O2 TEST

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USER MENU OPERATION

PRINT MENU

From the working display access the menu by pressing and holding the
MENU (B) button until the top line of the display reads USER MENU.

The bottom line will read PRINT MENU. Press the MENU (B) button to
access the PRINT MENU options. Use the SAVE/ZERO (C) button to
select the CAL LOG or SESSION LOG option.

At this time prepare the printer. Aim the IR LED on the right side of the
instrument to the IR receptor on the printer.

Press the MENU (B) button to print the data. Pressing the POWER/
MUTE (A) button will reenter the USER MENU.

Use the SAVE/ZERO (C) button at this time to scroll to another menu
function as indicated by the top line reading USER MENU.

Pressing the POWER/MUTE (A) button will return the instrument to the
working (gas readings) display.

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USER MENU OPERATION

POWER OFF

From the working display access the menu by pressing and holding the
MENU (B) button until the top line of the display reads USER MENU.

Press and release the SAVE/ZERO (C) button until the bottom line
displays POWER OFF. Press the MENU (B) button.

Use the SAVE/ZERO (C) button to increase the number of minutes of
run time and the MENU (B) button to reduce them.

Setting the timer to 0 will cause the unit to always remain on. After
adjusting the number, press and release the POWER/MUTE (A) button
to save the adjustment.

Use the SAVE/ZERO (C) button at this time to scroll to another menu
function as indicated by the top line reading USER MENU.

Pressing the POWER/MUTE (A) button will return the instrument to the
working (gas readings) display.

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USER MENU OPERATION

SET CLOCK

From the working display access the menu by pressing and holding the
MENU (B) button until the top line of the display reads USER MENU.

Press and release the SAVE/ZERO (C) button until the bottom line
displays SET CLOCK. Press the MENU (B) button. The day will ash
upon entering the SET CLOCK option.

The SAVE/ZERO (C) button advances to the next item and the MENU
(B) button changes the ashing item. All settings are based on US time
and date settings using a 24 hour clock.

After adjusting all numbers press and release the POWER/MUTE (A)
button to save the adjustment.

Use the SAVE/ZERO (C) button to scroll to another menu function as
indicated by the top line reading USER MENU.

Pressing the POWER/MUTE (A) button will return the instrument to the
working (gas readings) display.

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USER MENU OPERATION

SHOW A CALIBRATION LOG

From the working display access the menu by pressing and holding the
POWER/MUTE (A) button until the top line of the display reads USER MENU.

Press and release the SAVE/ZERO (C) button until the bottom line
displays SHOW CAL LOG. Press the MENU (B) button.

At this time one of the gases and the last calibration date will be displayed.
Use the SAVE/ZERO (C) button to review all other calibrations dates
and their respective gases.

After review of the last available gas the instrument will automatically
return to the user menu as indicated by the top line reading USER
MENU. Pressing the POWER/MUTE (A) button will return the instrument
to the working (gas readings) display.

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USER MENU OPERATION

SHOW A SESSION LOG

From the working display access the menu by pressing and holding the
MENU (B) button until the top line of the display reads USER MENU.

Press and release the SAVE/ZERO (C) button until the bottom line
displays SHOW SES LOG. Press the MENU (B) button.

Use the SAVE/ZERO (C) button to scroll to the saved session you wish
to review. SESSION 1 is the most recent data saved.

Pressing the MENU (B) button will display the date and time of that
session. Pressing the MENU (B) button again will display the gas
reading.

Pressing the SAVE/ZERO (C) button will allow you to scroll through all
other gas readings.

Press the POWER/MUTE (A) button to return to SESSION (No.)
and pressing the SAVE/ZERO (C) button will allow you to review all
previously saved SESSION’s by date.

Press the MENU (B) button to review the gas data. Pressing the
POWER/MUTE (A) button 3 times will return you to the USER MENU.

Pressing the POWER/MUTE (A) button once more returns you to the
working display.

The number of stored session log saves is factory set at 6. It can store
up to 16 by changing factory settings (contact factory for instructions).

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TESTS AND CALIBRATION

BUMP TEST

From the working display access the menu by pressing and holding the
MENU (B) button until the top line of the display reads USER MENU.

Press and release the SAVE/ZERO (C) button until the bottom line
displays BUMP TEST.

Prepare 100ppm CO for application to the instrument. Attach the hose to
the inlet connection. Turn on the gas.

Press the MENU (B) button. EACH GAS must read 80% of calibrated
value within 45 seconds. The readings are on the left and the timer is on
the right side of the display.

If the instrument passes, the display will read BUMP TEST PASSES and
a beep will sound.

If the instrument fails, the display will read BUMP TEST FAILED and a
beep will sound.

At the end of any bump test press the POWER/MUTE (A) button to
return to the working display.

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TESTS AND CALIBRATION

SMART-CAL

From the working display access the menu by pressing and holding the
POWER/MUTE (A) button until the top line of the display reads USER
MENU. Press and release the SAVE/ZERO (C) button until the bottom
line displays SMART CAL.

Place the instrument into the cradle provided on the left side of the Smart­Cal Calibration Station. Attach the tubing from the station to the inlet side
of the instrument.

Press the center button. The display will show “SMART CAL
Communicating” and the pump will turn off. Select the test from the Smart­Cal Station to be performed. At the end of the test the instrument will beep
3 times and display PASS or FAIL.

Retry the test if necessary by pressing the proper button on the Smart-Cal
Station again. Press the left button to return the working display, remove
the tubing and return instrument to service or send instrument to the
proper place for repair per company procedures.

SHORTCUT TO ACCESS SMART-CAL:

Place the instrument into the cradle provided on the left side of the Smart­Cal calibration Station. Attach the tubing from the station to the inlet side of
the instrument.

While in the working display press the power button for 2-3 seconds and
release. The display will show “SMART CAL Communicating” and the
pump will turn off. Perform all tests as described in the SMART CAL section.

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CALIBRATION

From the menu options, it is possible to calibrate the sensor in the
SENSIT® HCN instrument. Calibration is the process of setting the
readings of the instrument to certied calibration gases.

When calibrating, the numbers shown on the display represent the
numbers seen by the microprocessor. These readings should not be
confused with actual gas readings.

Prior to any calibration, power the instrument in a gas free environment.
Allow 5 minutes of additional warm-up time and manually zero the
instrument using the SAVE/ZERO (C) button.

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CALIBRATION

From the working display access the menu by pressing and holding the
MENU (B) button until the top line of the display reads USER MENU.

Press and release the SAVE/ZERO (C) button until the bottom line
displays CALIBRATION. Press the MENU (B). The top line will now
read CALIBRATION.

HYDROGEN CYANIDE (HCN) CALIBRATION (HCN 10PPM)

To calibrate HCN, push the MENU (B) when the top line reads
CALIBRATION and the bottom line reads HCN 10 PPM.

Immediately apply 10 ppm HCN.

When the reading is satisfactory, the display will read DATA SAVED
indicating calibration is complete.

The date for CAL PAST DUE is automatically reset at this point.

Pressing the POWER/MUTE (A) button will return the instrument to the
working (gas readings) display. Remove the gas.

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MANUAL CALIBRATION

CARBON MONOXIDE (CO) CALIBRATION (100PPM CO/AIR)

To calibrate CO, push the MENU (B) when the top line reads
CALIBRATION and the bottom line reads CO 100 PPM.

Immediately apply 100 ppm CO (balance air).

When the reading is satisfactory, the display will read DATA SAVED
indicating calibration is complete.

The date for CAL PAST DUE is automatically reset at this point.

Pressing the POWER/MUTE (A) button will return the instrument to the
working (gas readings) display. Remove the gas.

NOTE: Improper calibration is indicated by “Bad Cal” when save is
attempted. Calibration will be based on the last successful calibration.
Recalibration is recommended. The calibration due date will not be
updated until successful calibration has occurred. Any instrument that
does not calibrate requires service. Contact SENSIT Technologies for
details.

CAUTION: Using calibration kits other than the recommended kit may
cause inaccurate readings. Repairs are required if any sensor fails to
calibrate. Contact manufacturer for details.

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NOTES

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WARRANTY

Your SENSIT® HCN is warranted to be free from defects in materials
and workmanship for a period of two years after purchase (excluding
sensors, calibration and batteries). If within the warranty period, your
instrument should become inoperative from such defects, the unit will be
repaired or replaced at our option. This warranty covers normal use and
does not cover damage which occurs in shipment or failure which results
from alteration, tampering, accident, misuse, abuse, neglect or improper
maintenance. Proof of purchase may be required before warranty is
rendered. Units out of warranty will be repaired for a service charge.
Internal repair or maintenance must be completed by an authorized
technician. Violation will void warranty. Units must be returned postpaid,
insured and to the attention of the Service Dept. for warranty or repair.

This warranty gives you specic legal rights and you may have other
rights which vary from state to state.

SENSIT Technologies
851 Transport Drive
Valparaiso, IN 46383

SENSIT HCN Instruction Manual
Part # 750-00015

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Revision 7-1-2015