ENMET GSM-60 User Manual

ENMET Corporation

PO Box 979
Ann Arbor, MI 48106-0979

www.enmet.com

GSM-60

O

PERATION AND MAINTENANCE

M

ANUAL

Manual Part Number
80003-600

MCN-470, 12/10/12

Table of Contents

1.0 I

NTRODUCTION

1.1 Unpack.............................................................................................................................................................. 1

1.2 Check Order ..................................................................................................................................................... 1

1.3 Serial Numbers ................................................................................................................................................. 1

2.0 I

NSTRUMENT FEATURES

2.1 Exterior Features .............................................................................................................................................. 1

2.2 Display Panel Features ..................................................................................................................................... 2

2.3 Circuit Board Features ...................................................................................................................................... 4

3.0 I

NSTALLATION

3.1 Mounting of Instrument .................................................................................................................................... 5

3.2 Power Supply ................................................................................................................................................... 6

3.3 Inputs / Outputs ................................................................................................................................................ 6

3.3.1 Sensor/Transmitter Connection .............................................................................................................. 7

3.3.2 Relay Contacts ........................................................................................................................................ 7

3.3.3 Optional 4-20mA Outputs....................................................................................................................... 8

3.4 Installation Verification .................................................................................................................................... 8

4.0 O

PERATION

4.1 Normal Operation Condition ............................................................................................................................ 9

4.2 Alarm Set Points ............................................................................................................................................... 9

4.3 Alarm Latching or Differential Settings ......................................................................................................... 10

4.4 Audio Defeat .................................................................................................................................................. 10

4.5 Display............................................................................................................................................................ 10

4.6 Operational Menu ........................................................................................................................................... 11

4.7 Fault Indications ............................................................................................................................................. 12

4.7.1 Low Flow Indication ............................................................................................................................ 12

4.7.2 Other Fault Indications ........................................................................................................................ 12

4.8 Hydrocarbon Sensor Response ....................................................................................................................... 12

5.0 M

AINTENANCE

5.1 Cleaning Instructions ...................................................................................................................................... 13

5.2 Maintenance Menu ......................................................................................................................................... 13

5.2.1 Accessing Maintenance Menu .............................................................................................................. 13

5.2.2 Maintenance Menu Flow Chart ............................................................................................................ 14

5.3 Calibration for CO, O

5.3.1A Low Cal/ZeroCal Adjust..................................................................................................................... 16

5.3.1B High Cal/SpanGas Adjust .................................................................................................................. 17

5.3.2 Set 4 –20mA Transmitter Scale ............................................................................................................ 17

5.3.3 Set Alarm Points ................................................................................................................................... 18

5.3.4 Set Alarm Delay.................................................................................................................................... 20

5.3.5 Relay Configuration ............................................................................................................................. 21

5.3.6 Failsafe Configuration ......................................................................................................................... 22

5.3.7 Set Output Span Range ......................................................................................................................... 22

5.3.8 Set New Password ................................................................................................................................ 23

5.3.9 Exit Maintenance Menu ........................................................................................................................ 23

5.4 Sensor Replacement ....................................................................................................................................... 24

5.4.1 Gas/Oxygen Sensor .............................................................................................................................. 24

5.4.2 Calibration/Sensor Replacement .......................................................................................................... 24

5.4.3A Low Cal/ZeroCal Adjust..................................................................................................................... 26

5.4.4B High Cal/SpanGas Adjust .................................................................................................................. 27

5.5 Flow Control Orifice ...................................................................................................................................... 27

6.0 T

ECHNICAL DATA AND SPECIFICATIONS

7.0 R

EPLACEMENT PART NUMBERS

7.1 ENMET part numbers for sensors and replacement parts: .............................................................................. 28

7.2 ENMET part numbers for Calibration equipment: .......................................................................................... 28

8.0 WARRANTY ......................................................................................................................................... 29

A

PPENDIX A: CO CHARACTERISTICS

.......................................................................................................................................... 1

............................................................................................................................. 1

........................................................................................................................................... 5

............................................................................................................................................... 9

......................................................................................................................................... 13

HC and CO2 (Gas Channels) ..................................................................................... 15

2,

................................................................................................... 27

............................................................................................................... 28

............................................................................................................. 30

A

PPENDIX B: GAS IONIZATION POTENTIALS

F

IGURE 1: EXTERNAL FEATURES OF THE

F

IGURE 2:

F

IGURE 3:

F

IGURE

F

IGURE 4:

F

IGURE 5:

F

IGURE 6:

F

IGURE 7:

F

IGURE 9: LOCATION OF GAS SENSOR AND PI

F

IGURE 7:

F

IGURE

GSM-60 I
GSM-60 M

2A: R

GSM-60 O
GSM-60 O
GSM-60 M
GSM-60 C

GSM-60 C

10: C

NTERIOR FEATURES

OUNTING DIMENSIONS

ELAY, INPUT AND OUTPUT TERMINALS

PERATIONAL DISPLAY
PERATION MENU FLOW CHART

AINTENANCE MENU FLOW CHART

ALIBRATION CONNECTIONS

ALIBRATION CONNECTIONS

ARBON MONOXIDE CONCENTRATION

GSM-60......................................................................................................... 3

...................................................................................................................... 4

................................................................................................................. 9

T

ABLE 1 : RELAY FAILSAFE SETTINGS

T

ABLE 2: SENSOR OUTPUT

T

ABLE 3: TYPICAL FACTORY ALARM SET POINTS

T

ABLE 4: FACTORY SET GAS ALARMS DELAY

........................................................................................................................................... 8

.......................................................................................................................... 8

Reference Information:

N

OTE

: [important information about use of instrument]

C

AUTION

: [affects equipment – if not followed may cause damage to instrument, sensor etc…]

................................................................................................... 31

List of Figures

................................................................................................................. 5

..................................................................................................... 6

.................................................................................................. 11

. ............................................................................................. 14

........................................................................................................ 16

D(HC) M

ANIFOLDS

................................................................................ 24

........................................................................................................ 26

...................................................................................................... 30

List of Tables

.......................................................................................................... 9

............................................................................................................. 20

W

ARNING

:

Attention / Warning

!

Earth Ground

[affects personnel safety – if not followed may cause bodily injury or death.]

GSM-60 ENMET Corporation











Corporation

734-761-1270

734-761-3220 Fax

1.0 Introduction

The GSM-60 is a sample draw monitoring instrument that measures and detects certain toxic hazards gases. The GSM-60 was
designed primarily for monitoring one area with a single sampling hose, either for an individual gas or multiple gases. The
instrument has one sampling pump and one flow sensor. The instrument is available with up to 4 internal sensors. Available
sensors include, but are not, limited to carbon monoxide (CO), carbon dioxide (CO2), Hydrocarbons (HC) and variations in the
oxygen (O2) content. The sensors can be used alone or up to four sensors can be used together. Some applications require
monitoring of more then one area. If two sampling hoses are connected to one GSM-60 the flow sensor can only detect a total
flow fault condition. For example, a pump failure or both sampling hoses being blocked. The system can not detect a flow
fault if only one of the two sampling hoses is blocked. Flowmeters should be installed in both sampling lines to provide a
visual indication of proper flow. In the instrument, a 24 VDC sampling pump pass air over each sensor and the resulting
electrical outputs are used to evaluate the air for the target gases.
The GSM-60 is a highly adaptable instrument. Some adaptations require an addendum be added to the manual to facilitate use
of the instruments with these adaptations. If addendum is needed, see page(s) between sections replacement part numbers and
warranty.
Some features of the instruments are as follows:

continuous monitoring of the sample air  alarm relay contacts available on terminals
continuous LCD display of gas and vapor concentrations
menu driven operational and maintenance controls  low air flow fault indication and display
menu driven calibration procedure  alarm acknowledgement capability including audio defeat
audio and visual alarms indicate unsafe conditions  mA outputs for each target gas

Hydrocarbons (HC) are limited to gases with an ionization potential of 10.6 eV or less. See Appendix B for a list of gases and
IPs.

N

OTE

: All specifications stated in this manual may change without notice.

1.1 Unpack

Unpack the
the commercial carrier involved immediately.

GSM-60

and examine it for shipping damage. If such damage is observed, notify both ENMET customer service personnel and

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

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

680 Fairfield Court

Ann Arbor, MI 48108

1.2 Check Order

Check, the contents of the shipment against the purchase order. Verify that the
the order, ascertain that they are present. Check the contents of calibration kits. Notify ENMET customer service personnel of any
discrepancy immediately.

1.3 Serial Numbers

Each

GSM-60

is serialized. These numbers are on tags on the equipment and are on record in an ENMET database.

 a fault relay and visual fault alarm

forward a written request to ENMET

GSM-60

is received as ordered. If there are accessories on

2.0 Instrument Features

2.1 Exterior Features

The exterior of the instrument is shown in Figure 1. The exterior features are as follows:

1

GSM-60 ENMET Corporation

Feature Description
Enclosure

Input Port

An engineered thermoplastic box, approximately 10x8x6, with a clear hinged front cover.
The entrance for the air sample and calibration gas. The quick release fitting mates with

one on the calibration adapter.

Front Cover Latch

A quick-release latch that holds the clear front cover in place, and is capable of being
padlocked if desired.

Audio Alarm
Mounting Flanges
Output Port

A loud horn activated by certain alarm conditions.
Flanges with holes for mounting the enclosure to a vertical surface.
The exit to exhaust the air sample and calibration gas. Laur fitting.

2.2 Display Panel Features

The display panel, shown in Figure 1, is viewed through the clear front cover of the enclosure, and is accessed by opening the
cover. Features are as follows:

Feature Description
Display

Visual
Alarms & Indicators

Pushbutton Switches

•O

PTION

Switch

•S

ELECT

Switch

•Audio Defeat / Alarm
Acknowledge
Switch

A 2 line, 16 character per line, LCD with backlight.
The numerical values of gas concentrations, and other information are displayed.

On either sides of the display:

A red alarm LED for each sensor installed in the instrument, Low level alarm.

The top center of the panel:

A red alarm LED for all sensors installed in the instrument, High level alarm.

Near the center of the panel:

A green power indicator LED
A red fault alarm indicator LED

There are three of these, located near the center of the panel; they are yellow
rectangular membrane switches. They are:

The top left switch.

Directly to the right of the

OPTION

switch.

Directly below the

OPTION

switch.

2

GSM-60 ENMET Corporation

O2

CO

Quick Release Fitting

Faul

t LED

SELECT

OPTION

Switch

A

/

*Visual Alarm O2

*Visual Alarm CO

Mounting Flanges

H2S

ppm

*Visual Alarm

See *note below

Display,

Channel #1

Channel #3

Channel #4

Channel #2

ALARM 2

Sample Output Port

(See *note below)

Visual Alarm 2

CO reading O2 reading

H2S reading

see *note below

(If Oxygen option is installed)
See *note below

Dew Point

(

If Dew Point option

is installed)

LARM ACKNOWLEDGE

A

LARM DEFEAT

Switch

ppm

OPTION

%

Input Port

Sample/Calibration

Switch

Power LED

SELECT

POWER
FAULT

ALARM

ACKNOWLEDGE

Front Cover Latch

Audio Alarm

2 places

Figure 1: External Features of the GSM-60

*

N

OTE

: Typical gas reading & alarm locations, depending on instrument configuration, alarms & readings

may be in alternate locations

3

GSM-60 ENMET Corporation

Pow

er Input

Sensor PiD (HC)

Relay Terminals

Sensor/Transmitter

Fuse Holders

Sensor

Digital Communication

Ground Screw

4 –

20mA Output

Sampling Pump

2.3 Circuit Board Features

The Display Panel is hinged on the left and is released by unscrewing the 2 screws located in the right corners. After releasing
the panel, it is swung to the left, exposing the interior of the enclosure. The Circuit Board is mounted at the back surface of the
enclosure interior. Features are shown in Figure 2.

Feature Description
Relay Terminals

Output Terminals
HC Manifold

Sensor Manifold

Filter, Particulate
Sensor Terminals

J16, J18, J19

Flow Sensor

This group of terminals is located at the left side of the Circuit Board.
For the contacts for each of four alarm relays, and for the contacts of a fault relay.

One 4-20mA output per active channel. 2 channels/outputs per connector.
The PiD sensor is installed into this housing.

The sample manifold, the carbon monoxide, carbon dioxide and oxygen sensors are
located under this housing.

Removes contaminate from air sample line.
Sensor/Transmitter connectors 24VDC 4-20mA Input

Particulate Filter

Manifold

Horn Terminal

(6 places)

Terminals

J16, J18, J19

1.0 Amp

J21

Terminals

4 places

Input Port Fitting

Terminals

Manifold

Audio Alarm

Location

Terminal J23

Output Port Fitting

Figure 2: GSM-60 Interior Features

4

GSM-60 ENMET Corporation

Mounting Holes

3.0 Installation

3.1 Mounting of Instrument

The GSM-60 should be located near the air to be monitored. Sampling lines should be no more then 50 feet long. It is
recommended that Teflon® (PTFE) lined tubing be used. Quick disconnect fittings are supplied for use with 1/8” ID tubing.

Mount the instrument on an appropriate vertical surface using the mounting flanges provided. Avoid areas with excessive
vibration or temperature extremes. The holes in the flanges are 0.31 inch in diameter and form a 6 x 10.75 inch rectangle. See
Figure 3.

It is recommended to use #8 drywall anchors and screws for mounting the GSM-60 to a drywall/sheetrock surface.

0.31” dia. 4 places

Dimensions are in inches.

Figure 3: GSM-60 Mounting Dimensions

5

GSM-60 ENMET Corporation

Input Connecto

r

DC

GND

mA

Input Connector

DC

GND

mA

Input Connector

DC

GND

mA

Connector 2

Connector 1

Ground Screw J21

Power Input

Terminal J23

3.2 Power Supply

The input power can vary from 100 to 240VAC, 50/60 Hz. Mains power should be connected to the Power Input Terminal J23
and the ground screw J21. See Figure 2 for location.

W

ARNING

:

Continuous gas detection and alarm systems (110VAC/220VAC / 24VDC/12VDC powered) become inoperative upon

loss of primary power. Contact factory for specifications and pricing of backup battery systems.

Upon supplying air and power to the instrument:

 The green power on LED is lit.
 The display backlight is lit, and instrument will step through a start-up sequence: unit serial number, software revision and

gases monitored may be shown on the display.
The instrument may go into alarm briefly, but the sensors stabilize quickly. If the instrument persists in alarm, acknowledge the
alarm by pressing the

AUDIO DEFEAT

/

ALARM ACKNOWLEDGE

switch. If alarm persists longer than 30 minutes, call ENMET

customer service personnel.

3.3 Inputs / Outputs

Two types of alarm outputs are available, relay contacts and 4-20mA outputs.

Channel 3 & 4
4-20mA Output

Relay 1

24V

Channel 1
Alarm 1

Relay 2
Channel 2
Alarm 1

Relay 3
Channel 3
Alarm 1

Relay 4
Channel 4
Alarm 1

Relay 5
Channel 1-4
Alarm 2

Relay 6
Ch 1-4 / System
Fault

Channel 1 & 2
4-20mA Output

Connector RS485

Connector RS232

Connector RS485

24V

24V

Figure 2A: Relay, Input and Output Terminals

6

GSM-60 ENMET Corporation

Heavier than Air Gas

Sens

or Location

Bottled LP (liquefied petroleum)

Lighter than Air Gas

Sensor Location

Natural gas (methane)

Same Density as Air Gas

Sensor Location

3.3.1 Sensor/Transmitter Connection

Sensor/Transmitters are connected to the GSM-60 control unit with two or three-conductor wiring, use the correct oiltight
fitting. Size of wire depends on the distance between the sensor/transmitter and the control unit.

See Recommended Wire Gauge Table below.

2 Wire for Sensors/Transmitter

3 Wire for Sensors/Transmitter

Position Function Position Function

1 Power +24 VDC

1

Power +24 VDC

2 Not Used 2 Power Ground
3 Signal/Return to Ground 3 Signal

Recommended Wire Gauge

Distance from Sensor to Control Unit

< 500 feet 16 AWG
501 – 800 feet 14 AWG
Longer Distances Contact Factory

N

OTE

: Sensor Location

Gases have different densities. Some are heavier than air and concentrate at the bottom of a space. Some are lighter than air
and gather at the top. Consider the density of the gas you want the sensor to detect when you install the sensor. Some
examples are given below.

Recommended Wire Gauge

Propane
Butane
Gasoline
Trichloroethylene
Vaporized hydrocarbons
Hydrogen sulfide

Ammonia
Hydrogen

Carbon Monoxide 4-6 feet above the (generally uniform) floor.

• DO N

• Avoid locating anywhere near a vent or window or near an outside

Near ceiling.

• DO N

• DO N

OT

locate directly above or beside gas appliances (ovens,

heaters).

doorway.

OT

locate directly above appliances where it is subject to direct

exposure to heat or steam.

OT

locate in direct air currents of windows, doors, or vents.

If you have a question involving the location of a unit or sensor, please contact your distributor or ENMET personnel. A
technician will analyze the question and recommend a location.

3.3.2 Relay Contacts

Relay contacts are available for each alarm; these are SPDT, rated at 10Amp at 110VAC, and may be latching or non-latching
as required by the application.

They are accessed on the terminals next to each relay see Figure 2 & 2A. The contact positions are noted on the circuit board
next to each terminal.

Relays may also be configured as failsafe or non-failsafe. The default alarm relay configuration is for latching mode, and
failsafe. They may be reconfigured in the maintenance menu. See section 5.3.5 & 5.3.6

The PC Board is labeled for the relays in their un-energized state. If the relay is configured for failsafe, then this is also the alarm
condition state. Non-failsafe configured relays in the alarm state, are the reverse of the PC board labeling. Note that the
Fault(FLT) relay cannot be set to operate in a Non-Failsafe mode. Please see the Table 1:

Interior wall; 18-24" from floor.

7

GSM-60 ENMET Corporation

Position

Failsafe

-

Alarm

Non-Failsafe

-

Alarm

Channel 1

Channel 2

Channel 3

Channel 4

Table 1 : Relay Failsafe Settings

J5 Relay 1 - NO Normally Open Normally Closed
J5 Relay 1 - COM Common Common
J5 Relay 1 - NC Normally Closed Normally Open
J6 Relay 2 - NO Normally Open Normally Closed
J6 Relay 2 - COM Common Common
J6 Relay 2 - NC Normally Closed Normally Open
J8 Relay 3 - NO Normally Open Normally Closed
J8 Relay 3 - COM Common Common
J8 Relay 3 - NC Normally Closed Normally Open
J10 Relay 4 - NO Normally Open Normally Closed
J10 Relay 4 - COM Common Common
J10 Relay 4 - NC Normally Closed Normally Open
J14 Relay 5 - NO Normally Open Normally Closed
J14 Relay 5 - COM Common Common
J14 Relay 5 - NC Normally Closed Normally Open
J15 Relay 6/FLT - NO Normally Open N/A
J15 Relay 6/FLT - COM Common N/A
J15 Relay 6/FLT - NC Normally Closed N/A

Relays can be linked to specific alarms. The table below shows the default relay links. They may be changed in the
maintenance menu if required. See Section 5.0.

Relay 1 Low Alarm
Relay 2 Low Alarm
Relay 3 Low Alarm
Relay 4 Low Alarm
Relay 5 High Alarm High Alarm High Alarm High Alarm

In addition, there is a fault relay, which changes state whenever the instrument is in a fault condition. The contact positions are
noted on the circuit board next to each terminal. See Figure 2A. The coil of this relay is energized when the instrument is in
the non-fault state; the contact conditions given on the circuit board next to the terminal, are for the non-energized state, which
is identical to the fault state.

These relay contacts can be used to operate auxiliary alarms or other functions. It is recommended that power for auxiliary
equipment be supplied from an independent power source, separate from the GSM-60. Place a hole in the enclosure for a wire
exit, and use appropriate cable fittings. Be sure to note the location and depth of hardware inside the enclosure.

3.3.3 Optional 4-20mA Outputs

Isolated 4-20 mA outputs are available for data logging or other purposes. An output is supplied for each sensor supplied in a
particular instrument, and can be added when a sensor is added in the field. These outputs are available on the Connector 1 for
channels 1 & 2 and Connector 2 for channels 3 & 4.

4mA corresponds to a sensor reading at the bottom of the instrument range and 20mA corresponds to a full scale reading.
Standard ranges are shown in Table 2.

Table 2: Sensor Output

Sensor 4mA 20mA

CO 0 50
O2 0 30
CO2 0 5000
HC 0 100

Wiring requirements are the same as for the relays.

3.4 Installation Verification

All instruments are calibrated at the factory. You may, if a calibration kit is available, calibrate the any and all gas channels of
the instrument 24 hours after installation to verify proper installation and instrument operation. See Section 5.0, Maintenance,
for calibration instructions. Calibration is also recommended after the first month of operation. Subsequent calibrations should
be performed every 3 months. The dew point sensor can not be calibrated in the field.

8

GSM-60 ENMET Corporation

CO

0

O2 20.9

CO

PPM

O2

%

H2S

CO2

PPM

4.0 Operation

4.1 Normal Operation Condition

With the GSM-60 installed as described in Section 3, and in clean air, the POWER green LED is on, the display is lit and the
information on the display is as shown in Figure 4 Display, for the sensor(s) installed in the GSM-60. The red alarm and fault
LEDs are not lit.

PPM

Example of display with CO(ch 1), H2S (ch 2), Oxygen(ch 3) and CO2(ch 4)options installed

H2S 0 CO2 300

Figure 4: GSM-60 Operational Display

4.2 Alarm Set Points

There are two alarm set points for each installed channel of the GSM-60. The factory settings of these alarm set points are
shown in Table 3.

Table 3: Typical Factory Alarm Set Points

Typical Channel #

1 Carbon Monoxide 10 ppm 20 ppm
2 Hydrogen Sulfide 10 ppm 20 ppm
3 Oxygen Deficiency 19.5 % by volume 23.5 % by volume
4 Carbon Dioxide 500 ppm 1000 ppm
4 Hydrocarbon 5 ppm 10 ppm

These alarm set points can be changed within limits; see the maintenance section of this manual for the procedure.
 If the CO concentration increases above that of the alarm set point, the associated red LED is lit, the associated relay

changes state, and the audio alarm is activated.
 If the dew point increases above that of the alarm set point, the associated red LED is lit, the associated relay changes state,

and the audio alarm is activated.
 If the oxygen content of the sample air decreases below the deficiency alarm set point, the associated red LED is lit, the

associated relay changes state, and the audio alarm is activated.
 If the oxygen content of the sample air exceeds that of the abundance alarm set point, the associated red LED is lit, the audio

alarm is activated, and both the oxygen alarm relay and the oxygen high alarm relay change state.

 The HC sensor can only detect and alarm to hydrocarbons with an Ionization Potential of less then 10.6 eV. See Appendix

B.

 The HC sensor is broad range in nature and is unable to differentiate between different hydrocarbons.
 The Alarm 1 differential value is the delay of the GSM-60 staying in alarm condition until after the measured reading has

returned past the alarm point by the differential value. Example: If the alarm set point is Λ 10 and the differential is 2, the

GSM-60 will go into alarm at 10 and stay in alarm until the reading has dropped below 8.

Gas Alarm 1, Flashing LED Alarm 2, Steady LED

9

GSM-60 ENMET Corporation

4.3 Alarm Latching or Differential Settings

An instrument is shipped with the alarms in the latching mode. The alarms may be independently configured in the non­latching mode or differential setting by use of the maintenance menu.

See Section 5.3.3, for setting alarm 1 and alarm 2.

Standard Setting

 I

N THE LATCHING MODE

alarm relay contacts do not revert to the non-alarm state, until the

: at the cessation of the condition which causes an alarm, the alarm indications do not cease, and the

AUDIO DEFEAT / ALARM ACKNOWLEDGE

switch is
pressed. An alarm can also be acknowledged by pressing the switch during the alarm condition; then at the cessation of the
alarm condition, alarm indications cease and alarm relays revert to the non-alarm state. After an alarm is acknowledged,
alarms in the latching configuration are re-armed to latch at the next alarm condition.

 I

N THE NON-LATCHING MODE

: at the cessation of the condition that causes an alarm, the alarm indications automatically

cease, and the alarm relay contacts revert to the non-alarm state.

Differential Setting

 The Alarm 1 differential value is the delay of the GSM-60 staying in alarm condition until after the measured reading has

returned past the alarm point by the differential value. Example: If the alarm point is Λ 10 and the differential is 2, the

GSM-60 will go into alarm at 10 and stay in alarm until the reading has dropped below 8.

4.4 Audio Defeat

Pressing the
alarm LEDs continue to function, in the alarm state, during an alarm condition. As long as the alarm condition persists, the
audio alarm will “chirp” every 20 seconds.

 If after 15 minutes the alarm condition continues the audio alarm will reactivate at full intensity.
 If any other alarm condition occurs while the audio alarm has been silenced it will force the audio alarm to reactivate

immediately.

AUDIO DEFEAT / ALARM ACKNOWLEDGE

switch during an alarm temporarily silences the audio alarm. Relays and

4.5 Display

In clean air a display is shown in Figure 4. This position of the display is termed the "operational display". As explained
below, the display can be used to view other information by using the

Concentrations of CO and CO2 are given in PPM (parts per million parts of air). Dew point is given in degrees Fahrenheit at
55

PSIG

; this can be changed to degrees Centigrade by pressing the SELECT switch. Oxygen concentration is given in percent

by volume.
When sample flow is reduced below a limit, the bottom line of the display flashes “Low Flow Alarm”.

OPTION

and

SELECT

switches.

10

GSM-60 ENMET Corporation

3

4

vL19.5

D 500

23.5

1000

S

(O2)

(H2S)

(CO2)

PPM

30.0

5000

123456

6

4.6 Operational Menu

The operational menu allows the user to:

 View alarm set point concentration values
 View alarm ascending/descending trigger, latching and delay configurations
 Enter the maintenance menu with the proper Password.

The operational menu is accessed with the
5,

 Pressing the
 Pressing the

OPTION
SELECT

switch is indicated with a "O"

switch is indicated with a "S".

If the instrument is left at any location in the operational or maintenance menus, other than the operational display, with no
action taken for a period of 45 seconds, it returns to the operational display.

CH-1 CH­ CH-2 CH-

S

No
Function

O

Relays

6=ON

66666

No

S

Function

O

CH1 SCALE (CO)

0 – 50

PPM

O

Λ

L10 A1

vL-40

S

for each active channel

CH2 SCALE

O

0 – 50

O

CH3 SCALE

0.0 – 30.0 %

O

CH4 SCALE

0 – 5000

No

S

Λ

Function

O

Λ

L20 A2 Λ

Λ

L39

Λ

No

S

Function

O

ALARM1 Delays
(Seconds)

Alternating

O

50 mASPAN
68

No

S

Function

O

O

Enter Maint Menu

OPTION

PPM

S

S

S

5 5
5 5

Enter Password

_

and

SELECT

switches. The operational menu flow chart is shown in Figure

O = Press Option switch

S = Press Select switch

Displays are examples of gases:

 Channel 1 = Carbon Monoxide
 Channel 2 = Hydrogen Sulfide
 Channel 3 = Oxygen
 Channel 4 = Carbon Dioxide

Displays are examples of Alarms

Λ

- Indicates alarm triggered on
increasing value of reading

v - Indicates alarm triggered on

decreasing value of reading

Displays are examples of Alarms

L – Indicates alarm is in latching

mode.

(no L present) – Indicates alarm

is in non-latching mode.

Displays are examples of Alarms

D – Indicates alarm is in

Differential Setting.

(no D present) – Indicates alarm

is in Standard Setting.

No

S

Function

See Maintenance Menu Diagram

Figure 5: GSM-60 Operation Menu Flow Chart

11

GSM-60 ENMET Corporation

4.7 Fault Indications

4.7.1 Low Flow Indication

A flow sensor is used to furnish a low flow indication. When the sample air pressure drops below preset levels, the fault light
and audio alarm are activated, and the display flashes “Low Flow Alarm”. If two sampling hoses are connected to one GSM-
60, the flow sensor can only detect a total flow fault condition. For example: a pump failure or both sampling hoses being
blocked. The system can not detect a flow fault if only one of the two sampling hoses is blocked.

4.7.2 Other Fault Indications

Other fault indications are associated with sensor zero and calibration activities, and are described in the maintenance Section

5.0 of this manual.

4.8 Hydrocarbon Sensor Response

If a Hydrocarbon (HC) sensor is supplied with the GSM-60 instrument, it designed to detect hydrocarbon gases and vapors
with an ionization potential (IP) of 10.6 eV or less. Hydrocarbons with an IP of greater then 10.6 eV will NOT be detected.
Please see Appendix B for a list of common gases and vapors and their respective IP rating.
Unless otherwise noted Isobutylene is used as a calibration and reference gas.

12

GSM-60 ENMET Corporation

Enter Password

CO

PPM

O2

%

H2S

O

S

S

Enter Maint Menu

Changes digit indicated by underscore cursor

O

Valid

!

5.0 Maintenance

The GSM-60 requires periodic sensor calibration and replacement. Calibration of toxic gas and oxygen sensor should be
performed immediately following installation, one month after installation and every 3 months thereafter. HC sensor should be
calibrated on a monthly bases. Oxygen and CO sensor have an estimated lifetime of 1 – 2 years. The CO2 sensor has an
estimated lifetime of 3 years. Other sensors vary. Sensors should be replaced when they will not calibrate or shortly before the
end of the estimated lifetime.

5.1 Cleaning Instructions

C

AUTION

5.2 Maintenance Menu

5.2.1 Accessing Maintenance Menu

: Never spray a cleaning solution on the surfaces of the GSM-60 devices.

Clean the exterior of the GSM-60 enclosures with a mild soap solution on a clean, damp cloth. Do not soak the cloth with
solution so that moisture drips onto, or lingers on, external surfaces.

Under no circumstances should organic solvents such as paint thinner be used to clean instrument surfaces.

The GSM-60 maintenance menu is accessed by entering the proper password with the

OPTION

and

SELECT

switches. See

Section 5.2.2 Figure 6 for full Maintenance Menu flow chart.
Entrance to the maintenance menu is guarded with a four-digit Password. The factory default setting of the password is 1270.

When a valid numerical password is inserted, the user is allowed to enter the maintenance menu.
To enter the maintenance menu. Press the

OPTION

switch until “Enter Maint Menu” is displayed then press

SELECT

switch for

the Enter Password menu. Enter the valid password as described below.
In the "Enter Maint Menu" position

 Press the

SELECT

switch "Enter Password T 0" is displayed. Press

SELECT

switch once, to move cursor to next digit,

this will be the first digit of the password.

 In the T000 position, the underline cursor is under the left digit.
 Press the
 Press the

OPTION
SELECT

switch to change the left digit; select the correct digit.
switch, which locks the digit in place and moves the cursor one digit to the right.

Continue this process until the four-digit password is complete. When a valid password is inserted in this manner, the display is
transferred to the "Calibration" portion of the menu. If an invalid password is inserted you are returned to the Enter Maint
Menu display.

PPM

Example: Password Display (with factory installed password entered) and Flow Chart below.

(6)

To Calibration
See Section 5.2.2 Figure 6 for full Maintenance Menu flow chart.

1270

Invalid

Enter Password

T0000

Locks underscored digit and moves cursor to next digit

O = Option Switch
S = Select Switch

13

GSM-60

O

S

Press

O

to return to top of maintenance menu.

Press

See Section

To/From

Display

Changes digit indicated by underscore cursor

Valid

Invalid

Locks underscored digit and moves cursor to next digit

See Section 5.3.8

Press

O

until the channel to be

Calibrated

is displayed

See Section

Alarm

1

Press

O

until the gas alarm to be

Set

is displayed

See Section

Alarm

2

Press

O

until the gas alarm to be

Set

is displayed

See Section

Alarm Delay

Press

O

until the gas alarm delay to be

Set

is displayed

See Section

O

Ch 1, 2, 3, 4

Pressing

O

changes letter indicated by underscore cursor

See Section

Relay

Failsafes

Pressing

O

changes Failsafe setting from ON to OFF

See Section

Press

See Section

If installed

O

mA Output Span

Press

O

until the gas span to be

Set

is displayed

See Section

ENMET

Corporation

5.2.2 Maintenance Menu Flow Chart

The maintenance menu diagram is shown in Figure 6 Maintenance Menu Flow Chart. From the operational display, press
the

OPTION

Operational

switch 6 times; "Enter MAINTENANCE Menu" is displayed.

From Operational Menu

Press

O

PTION

Enter Maint Menu

(6)

O

(6 times)

S

Enter Password

0000

O

S

Locks underscored digit and moves cursor to next digit

O = Press Option
S = Press Select

MAINTENANCE MENU

Calibration

O

MAINTENANCE MENU

Scale mA Xmtrs

MAINTENANCE MENU

Set Alarm1

O

MAINTENANCE MENU

Set Alarm2

O

MAINTENANCE MENU

Set Alarm Delays

O

MAINTENANCE MENU

Configure Alarms

S

Select (Gas)

S

Select (Gas)

S

S

S

S

Calibration

Scale mA Xmtrs

Select: XX

Select: XX

Select: XX

R1 L

PTION

5.3 for calibration instructions.

PTION

until gas to be Set-Up is displayed

O

5.3.2 for transmitter set-up instructions.

PTION

5.3.3 for setting alarms instructions.

PTION

5.3.3 for setting alarms instructions.

PTION

5.3.4 for setting alarms instructions.

PTION

5.3.5 for configuring relay instructions.

MAINTENANCE MENU

Relay Failsafes

O

MAINTENANCE MENU

mA Output Span

O

MAINTENANCE MENU

Set New Password

O

MAINTENANCE MENU

Exit maint menu

S

S

S

R:1 Failsafe ON

Select: (Gas)

Password

XXXX

PTION
ELECT

to return to operational menu.

S

5.3.9 for instructions on how to exit Maintenance Menus.

O

S

PTION

5.3.6 for configuring relay failsafe instructions.

PTION

5.3.7 for output span instructions.

Changes digit indicated by underscore cursor

for changing password instructions.

Figure 6: GSM-60 Maintenance Menu Flow Chart.

14

GSM-60

O

S

S

XX 11

LowCal:

0

000

S

XX 14

S

each digit

Default Calibration Points

ENMET

Corporation

5.3 Calibration for CO, O

HC and CO2 (Gas Channels)

2,

Calibration is the process of setting the instrument up to read accurately when exposed to a target gas. This is a two step
process. A Low Calibration sets clean air reference point and the High Calibration function sets the sensitivity of the
instrument.

Calibration equipment is available from

ENMET

Corporation to calibrate the

GSM-60

. A list of needed material is in Section

7.0. A calibration adapter will have a fitting for the gas cylinder on one side, and a quick-disconnect to attach to the instrument
on the other.

You may exit the calibration section, at any time, by

pressing and holding

the

OPTION

switch for 3 seconds, if entering

calibration section by mistake or calibration gas is not available.
Wait 24 hours after initially supplying air and power to the

open the Front Panel to make adjustment. The calibration functions are operated through the

GSM-60

sensor before initial calibration. It is not necessary to

OPTION

and

SELECT

switches on

the front panel.
After entering a valid password to maintenance menu, see Section 5.2.1, the calibration section is the first menu section; enter

by pressing the

SELECT

switch.

Supply sensor with clean air for LowCal/ZeroCal setting and apply calibration gas for HiCal/SpanGas setting.



Press the



Press the



Press the
0" is displayed in the lower portion of display. This is the LowCal setting,

SELECT
OPTION
SELECT

switch "Calibration Select XX" is displayed.

XX =

the gas to be calibrated

switch, if needed, to change to the gas to be calibrated.
switch, the gas & current reading are displayed in upper portion of display. The mV reading & "LowCal

usually zero

, clean air must be supplied to the
sensor. This reading needs to be at or near zero. If it is not then a cylinder of clean 20.9 air should be used. See Figure 7 if
this is required.



Press the

SELECT

switch, that moves the cursor one digit to the right when the last digit is accepted the display will move

to "HiCal xx" gas calibration. xx = the level of gas to be used for calibration. The mV reading is shown in the upper right
hand corner of the display.



Apply calibration gas to sensor. See Figure 7. After about 1 minute and mV reading has stabilized.



Press the

SELECT

switch, that moves the cursor one digit to the right, when the last digit is accepted and the calibration is
successful the display will momentarily show Cal OK then slope and off set readings, before returning to the Calibration
Menu

Repeat above steps for each channel to be calibrated.

*N

OTE

: Instruments equipped with an oxygen sensor programmed with a range of 0 to 15% by volume require 99.999 % Nitrogen

(

ENMET

(

ENMET

To continue on too next section Press the



Press

Corporation part number 03295-100) be used for the LowCal/ZeroXCal setting and 5% by volume Oxygen
part number 03296-050) be used for HiCal/Span setting

OPTION

OPTION

switch until “Exit maint menu” appears and then press

switch.

SELECT

switch to return the instrument to the

Operational Display

Example:

From Valid Password Entry

MAINTENANCE MENU

Calibration

Full Calibration Flow Chart, for CO

Calibration

Select (Gas)

O

Press OPTION until the gas to be

Calibrated is displayed

Gas LowCal HiCal

CO 0 20
O2 N/A* 20.9*
CO2 0 1000
HC 0 10

CO:

each digit

CO:

HiCal: 0000

O = Press Option
S = Press Select

15

GSM-60

Calibrati

on/Sample Port

Cylinder Valve

Quick Disconnect

Calibration Adepter with Humidifier

- MOS

N

Fitting

and Regulator

ENMET

OTE

:

With twin tube input, the non-calibration

line must be plugged.

Corporation

2 places

To Cylinder of Gas

Plug

Cylinder of Gas

Humidifier

GSM-60

Example of Regulator

with

OPTIONAL TWIN TUBE INPUT

Figure 7: GSM-60 Calibration Connections

Calibration Process for MOS Sensors

The following calibration procedure must be followed whenever a 60 series part number appear in the part number of the
instrument,
Humidification is required when calibration is performed. In addition to the standard flow demand regulator, cylinder of
calibration gas you need



Warning: Be sure that the flow direction is correct,



5.3.1A Low Cal/ZeroCal Adjust

A Low Cal function should be performed only when the
cylinder of 20.9% oxygen to provide a clean air reference if necessary. Attach the cylinder to the calibration adapter, attach the
adapter to the instrument and allow gas to flow over the sensor for up to 4 minutes.

Enter the maintenance menu by repeatedly pressing

GSM-60

The first menu available is the Low Cal/ZeroCal.
Press the





examples

Fill the humidifier with clean water to about ¾ full, connect the flow demand regulator to one side of the humidifier and
connect the other side of the humidifier to the

GSM-60

With the cylinder regulator and humidifier assembled follow the above steps to complete the calibration process

Maintenance Menu flow chart.

SELECT

If the Low Cal/ZeroCal is successful

04652-6200-0000, 04652-7083-6000

ENMET

humidifier assembly part number 037000-000

instrument

switch 4 times to perform a Low Cal.

, The display will change to Hi Cal/SpanGas.

GSM-60

calibration/sampling port.

note the arrow on the humidifier

GSM-60

OPTION

sensor are exposed to clean uncontaminated air. Use a

switch, until the maintenance menu is displayed. See Figure 6,

, failure to do so will cause damage to the

If you wish to Hi Cal/SpanGas the sensor apply calibration gas. Proceed to gas calibration Section 5.3.1B
If you wish to Exit the maintenance menu, Press and
release. Then press

OPTION

switch until “Exit maint menu” appears and then press

hold

OPTION

switch until the Maintenance Menu is displayed then

SELECT

switch to return the instrument to

the Operational Display

If the Low Cal/ZeroCal is Not successful,

sensor is outside of safe parameters to Low Cal, a “SLP/Off Set err” will be

indicated. Repeat Section 5.3.1 Low Cal/ZeroCal Adjust making sure to use a cylinder of 20.9% Oxygen.

16

GSM-60

O

S

S

MAINTENANCE MENU

Set Up

S

each digit

S

each digit

5.3.1B High Cal/SpanGas Adjust

A High Cal/Span Gas should only be preformed after a successful Low Cal/ZeroCal has been completed.



Press the
to "

HiCal

SELECT

switch, that moves the cursor one digit to the right when the last digit is accepted the display will move

xx

" gas calibration. xx = the level of gas to be used for calibration. The mV reading is shown in the upper right

hand corner of the display.



Apply calibration gas to sensor. See



Press the

SELECT

switch, that moves the cursor one digit to the right, when the last digit is accepted and the calibration is

Figure 7

. After about 1 minute and mV reading has stabilized.

successful the display will momentarily show Cal OK then slope and off set readings, before returning to the Calibration

Menu
Repeat above steps for each channel to be calibrated.
To continue on too next section Press the



Press

OPTION

switch until “Exit maint menu” appears and then press

OPTION

switch.

SELECT

switch to return the instrument to the

Operational Display

5.3.2 Set 4 –20mA Transmitter Scale

This section of the maintenance menu is installed when there are 4-20mA style sensors for dew point or other gases. This
function is normally performed at the factory and is not usually required to be performed in the field unless a new transmitter
is installed.

After entering a valid password into maintenance menu, the Scale mA Xmtrs section is the second menu section, if it is
installed, enter by pressing the



Press the



Press the



Press the



Press the

SELECT
OPTION
SELECT
SELECT

switch "
switch, if needed, to change to the gas to be set up.
switch,
switch, that moves the cursor one digit to the right when the last digit is accepted the display move to the

full Scale mA Xmtrs menu



Press the



Press the

SELECT
SELECT

switch,
switch, that moves the cursor one digit to the right when the last digit is accepted the display will return

to the Scale mA Xmtrs menu



Repeat these steps for each 4 –20mA transmitter.



Press

OPTION

switch until “Exit maint menu” appears and then press

Operational Display

Example:

Sensor/Transmitter Set Up Flow Chart

Scale mA Xmtrs

S

ELECT

switch

mA Xmter Scale: Select

XX

" is displayed.

“Ch#: mAXmter: 4mA: 0000”

“Ch#: mAXmter: 20mA: 0000”

O

mA Xmtr Scale

Select (Gas)

CH#: XX mA Xmter

4mA: 0000

Press O

is displayed

is displayed

is displayed

SELECT

PTION

until the gas to be

CH#: XX mA Xmter

20mA: 0000

XX =

the gas to be set up.

switch to return the instrument to the

O = Press Option
S = Press Select

ENMET

Corporation

17

GSM-60 ENMET Corporation

5.3.3 Set Alarm Points

Factory alarm set points are discussed in Section 4.2, See Table 1. To change the alarm points, you must enter the
maintenance menu.

Entrance to the maintenance menu is guarded with a four-digit Password. The factory default setting of the password is

1270. When a valid numerical password is inserted, the user is allowed to enter the maintenance menu.
In the "Enter Maint Menu" position
 Press the

this will be the first digit of the password.

 In the T000 position, the underline cursor is under the left digit.
 Press the
 Press the

Continue this process until the four-digit password is complete. When a valid password is inserted in this manner, the display
is transferred to the "Calibration" portion of the menu. If an invalid password is inserted you are returned to the Enter Maint
Menu display.

After entering a valid password:

 Press the
 Press the
 Press the
 Press the

character, Λ for ascending trigger point or V for descending trigger point indicator.

 Press the
 Press the
 Press the
 Press the

If STD is selected, "ALARM 1 V L " is displayed.

The next character is the latching indicator L or NOL press the
The next character is the negative sign – press the
The next characters are the alarm 1 value, press the

When the last digit is accepted display returns to the "Set Alarm1" position.

If DIFF is selected, "ALARM 1

The next characters are the alarm 1 value, press the
Press the
 "ALARM 1
The next characters are the alarm 1 differential value, press the
Press the

When the last digit is accepted display returns to the "Set Alarm1" position.

Note: The Alarm 1 differential value is the delay of the GSM-60 staying in alarm condition until after the measured reading

has returned past the alarm point by the differential value. Example: If the alarm set point is Λ 10 and the differential is 2, the
GSM-60 will go into alarm at 10 and stay in alarm until the reading has dropped below 8.

 Repeat for each sensor alarm 1 to be changed.
 Press the

 Repeat as for alarm 1 using the STD section.
 Press

Display

SELECT

OPTION
SELECT

OPTION
SELECT
OPTION
SELECT

OPTION
SELECT
OPTION
SELECT

SELECT

SELECT

OPTION

OPTION

switch "Enter Password T 0" is displayed. Press

SELECT

switch once, to move cursor to next digit,

switch to change the left digit; select the correct digit.

switch, which locks the digit in place and moves the cursor one digit to the right.

switch until; “Maintenance Menu Set Alarm1” appears on display.

switch, "ALARM1 Select: XX" is displayed. XX = the gas of alarm point to be changed.

switch until, desired gas is displayed.

switch; "ALARM 1 V " is displayed, with the flashing placeholder underscore cursor, under the left most

switch to toggle between Λ and V; select the correct indicator.

switch to lock in the correct indicator. "ALARM 1

STD

" is displayed

switch to toggle between STD and DIFF; select the correct indicator.

switch to lock in the correct indicator.

DIFF Λ 000

OPTION

" is displayed.

OPTION

switch to toggle the negative sign.

OPTION

OPTION

switch to select each digit of the value

switch to select each digit of the value

switch to toggle the latching mode.

switch to lock in the correct character and move the cursor to the right.

DIFF BAND 000

" is displayed, press the

OPTION

switch to select each digit of the value.

OPTION

switch to select each digit of the value

switch to lock in the correct character and move the cursor to the right.

switch to move to alarm 2, "Set ALARM2" is displayed.

switch until “Exit maint menu” appears, then press

SELECT

switch to return the instrument to the Operational

18

GSM-60 ENMET Corporation

S

O

S

O

S

Alarm 2 -

Select:

XX

MAINTENANCE MENU

Set Alarm2

Changes character indicated by underscore cursor

Locks underscored character and moves cursor to next

O

Press

O

until the channel to be

Set

is displayed

Alarm 2

V L 0

000

O

S

S

O

O

S

Locks selection

S

0

00

L–010

Ala

rm 1

O

S

S

O

S

O

S

S

TL

Alarm 1

O

S

Locks selection

O

S

Example: Set Alarms Flow Chart
Displays are examples of Alarms

Λ -

Indicates alarm triggered on increasing value of reading

v

-

Indicates alarm triggered on decreasing value of reading

L-

Indicates alarm is set for latching

NO

L-

Indicates alarm is set for non-latching

O = Press Option
S = Press Select

STD – Indicates alarm in standard setting, can be set in latched or non-latched mode
DIFF – Indicates alarm in differential setting, instrument will stay in alarm beyond the alarm set point by the differential value

MAINTENANCE MENU

Set Alarm1

Alarm 1 -

Select: XX

Press O

PTION

until the channel to be Set is displayed

S

TD

Λ

Alarm 1

Λ

Alarm 1

STD

Λ

DIFF

Toggles status between Λ increasing trigger and v decreasing trigger

Locks selection

Toggles status between Standard and D

Alarm 1

Λ

DIFF 000

Alarm 1 DIFF BAND

Toggles status between
Latching and Non Latching

Changes character indicated
by underscore cursor

Locks underscored character and
moves cursor to next digit

PTION

IFF

Changes character indicated by
underscore cursor

Locks underscored character and
moves cursor to next digit

Changes character indicated by
underscore cursor

Locks underscored character and
moves cursor to next digit

See Section 4.2 Table 3 for factory alarm set points.

19

GSM-60

O

S

MAINTENANCE MENU

Set Alarm Delays

S

O

S

Alarm Delay -

Changes digit indicated by underscore cursor

Locks underscored digit and moves cursor to next digit

O

Select:

XX

Alarm Delay -

0

005

5.3.4 Set Alarm Delay

The alarms may be set to delay by 1 second increments, up to 255 seconds. Alarm delays are factory set to 5 seconds.
To change an alarm delay, you must enter the maintenance menu. Press the

displayed then press
See Table 4 below for factory set delays. A space is provided to record changes.

After entering a valid password:



Press the



Press the



Press the



Press the



Press the



Press the
accepted display returns to the "Set Alarm Delay" position.



Repeat for each sensor alarm delay to be changed.



Press
Operational Display

Example:

OPTION
SELECT
OPTION
SELECT
OPTION
SELECT

OPTION

Set Alarm Delay Flow Chart

SELECT

ENMET

OPTION

switch until “Enter Maint Menu” is

switch for the Enter Password menu. Enter the valid password as described in Section 5.2.1.

Corporation

switch until; “Maintenance Menu Set Alarm Delay” appears on display.
switch, "ALARM Delay Select: XX" is displayed.

XX =

the gas alarm to be changed.

switch until, desired gas is displayed.
switch; "ALARM Delay = 0000" is displayed, with the underscore cursor under the left digit.
switch to change the left digit; select the correct digit.
switch to lock in the correct digit and move the cursor one digit to the right. When the last digit is

switch until “Exit maint menu” appears and then press

Press Option until the channel to be

SELECT

Set

switch to return the instrument to the

is displayed

O = Press Option
S = Press Select

Table 4: Factory Set Gas alarms Delay

Gas Delay
CO 5 sec
H2S 5 sec
O2 5 sec
CO2 5 sec

20

GSM-60

Channel 1

Channel 2

Channel 3

Channel 4

O

S

MAINTENANCE MENU

Configure Alarms

Pressing

Pressing

5.3.5 Relay Configuration

To change a relay configuration you must enter the maintenance menu. Press the
is displayed then press

In the "Enter Maint Menu" position



Press the

this will be the first digit of the password.



In the T000 position, the underline cursor is under the left digit.



Press the



Press the
Continue this process until the four-digit password is complete. When a valid password is inserted in this manner, the
display is transferred to the "Calibration" portion of the menu. If an invalid password is inserted you are returned to the
Enter Maint Menu display.

After entering a valid password:



Press the



Press the



Press the

L

= Low Alarm, H = High Alarm, B = Both Alarms, T = No Relay linked to channel



Press the



Press
Operational Display

Example:

SELECT

OPTION
SELECT

OPTION
SELECT
OPTION

SELECT

OPTION

switch "Enter Password T 0" is displayed. Press

switch to change the left digit; select the correct digit.
switch, which locks the digit in place and moves the cursor one digit to the right.

switch until “Configure Alarms” is displayed
switch to enter the Configure Alarms menu
switch to set relay configuration as needed, see below for indications

switch to lock setting and move to next, channel and relay

switch until “Exit maint menu” appears and then press

Set Relay Configuration Flow Chart

SELECT

Ch 1,2,3,4
R1 L

Ch 1 2 3 4
R2 L

Ch 1 2 3 4
R3 L

OPTION

ENMET

switch until “Enter Maint Menu”

Corporation

switch for the Enter Password menu. Enter the valid password as described below.

Ch 1 2 3 4
R4 L

Ch 1 2 3 4
R5

H H H H

SELECT

SELECT

O

PTION

changes letter indicated by underscore cursor

S

ELECT

Locks underscored digit and moves cursor to next digit

O = Press Option
S = Press Select

switch once, to move cursor to next digit,

switch to return the instrument to the

The table below shows the default relay links.

Relay 1 Low Alarm
Relay 2 Low Alarm
Relay 3 Low Alarm
Relay 4 Low Alarm
Relay 5 High Alarm High Alarm High Alarm High Alarm

Relays can be linked to specific alarms.

N

OTE

: Each operating channel must be linked to at least 1 relay.

21

GSM-60

MAINTENANCE MENU

mA Output Span

mA OUTPUT SPAN

Select: CO

mA OUTPUT SPAN

_

50 CO

MAINTENANCE MENU

Relay

Failsafes

S

Pressing

Relay

Failsafes

R: 1 Failsafe ON

Relay

Failsafes

R: 2 Failsafe ON

Relay

Failsafes

R: 3 Failsafe ON

Relay

Failsafes

R: 4 Failsafe ON

Relay

Failsafes

R: 5 Failsafe ON

5.3.6 Failsafe Configuration

To change a relay failsafe configuration you must enter the maintenance menu. Press the
Menu” is displayed then press

In the "Enter Maint Menu" position



Press the

this will be the first digit of the password.



In the T000 position, the underline cursor is under the left digit.



Press the



Press the switch, which locks the digit in place and moves the cursor one digit to the right.
Continue this process until the four-digit password is complete. When a valid password is inserted in this manner, the
display is transferred to the "Calibration" portion of the menu. If an invalid password is inserted you are returned to the
Enter Maint Menu display.

After entering a valid password:



Press the



Press the



Press the



Press the



Press
Operational Display

Example:

O

SELECT

OPTION

OPTION
SELECT
OPTION
SELECT

OPTION

switch "Enter Password T 0" is displayed. Press

switch to change the left digit; select the correct digit.

switch until “Relay Failsafes” is displayed
switch to indicate relay to be set.
switch to set relay indicated, On or Off as appropriate.
switch to cycle through each of the 5 relays, return to “Maintenance Menu Relay Failsafes”

switch until “Exit maint menu” appears and then press

Set Relay Failsafe Configuration Flow Chart

S

SELECT

ENMET

OPTION

Corporation

switch until “Enter Maint

switch for the Enter Password menu. Enter the valid password as described below.

SELECT

SELECT

PTION

O

changes Failsafe setting from ON to OFF

Continue pressing

Changing the setting of each relay as needed, using the

to cycle through all 5 relays

ELECT

switch once, to move cursor to next digit,

switch to return the instrument to the

switch

Option

S

O = Press Option
S = Press Select

5.3.7 Set Output Span Range

To change 4-20 mA output range. This range is set at the factory and should not be changed, contact



Press the



Press
Operational Display

Example:

O

OPTION

OPTION

switch to continue to next section of maintenance menu.

switch until “Exit maint menu” appears and then press

Set Output Span Flow Chart

S

S

S

SELECT

O

Press

PTION

until the channel to be

O

O

Changes

S

Locks underscored digit and moves cursor to next digit

digit indicated by underscore cursor

switch to return the instrument to the

Set

is displayed.

O = Press Option
S = Press Select

ENMET

for information.

22

GSM-60

O

S

MAINTENANCE MENU

Set New Password

Password

0000

O

S

S

ENMET

Corporation

5.3.8 Set New Password

To change the password, you must enter the maintenance menu. Press the
then press

SELECT

switch for the Enter Password menu. Enter the valid password as described in Section 5.2.1.

To set a new password, after inserting a valid password,



Press the



Press the



Use the



Press the

OPTION
SELECT

OPTION

SELECT

switch until; "Set New Password” is displayed.

switch; "Password T1270" is displayed, with the underscore cursor under the left digit.

switch to change the left digit, when the desired digit is displayed.

switch to lock the digit in place and move the cursor one digit to the right.

When all four digits of the new password have been selected, "Set New Password" is displayed.
Record the new password; without it, the maintenance menu cannot be reentered once you exit the Maintenance Menu. If the

password is lost, call
From the "Password



Press the



Press the

Example:

Set Password Flow Chart

SELECT
OPTION

ENMET

XXXX

customer service personnel.

" position,

switch to return to Set New Password section.

switch; to continue to "exit MAINTENANCE Menu"

Changes digit indicated by underscore cursor

T

Locks underscored digit and moves cursor to next digit

OPTION

switch until “Enter Maint Menu” is displayed

O = Press Option
S = Press Select

5.3.9 Exit Maintenance Menu

From the "exit MAINTENANCE Menu" position



Press the



Press the

Example:

MAINTENANCE MENU

SELECT
OPTION

switch to resume the operational display.

switch to reenter the maintenance menu at the "Calibration" position.

Exit Maintenance Menu Flow Chart

CH-1 CH-3

Exit maint menu

CH-2 CH-4

O

MAINTENANCE MENU

Calibration

23

GSM-60

Gas Sensor Manifo

ld

To Pump

Orifice

ENMET

5.4 Sensor Replacement

5.4.1 Gas/Oxygen Sensor

A Gas sensor must be replaced when it can no longer be calibrated. To replace a sensor, perform the following steps.



Turn off the electrical power. The sample air can continue to flow.



Open the display panel and remove the four manifold retention screws and remove the manifold. See Figure 9.



Remove the old sensor, and replace it with a new sensor.

C

AUTION

:

Some new sensors come with a shorting clip that must be removed before installation, for proper operation. See

Figure 8.



Replace the manifold.



Turn on the electrical power.

Remove Shorting Clip
from Cell if Pr esent

Corporation

Bottom View of Sensor

PiD (HC) Sensor Manifold

Figure 8: Shorting Clip

Retaining Screw, 4 places

Figure 9: Location of Gas Sensor and PiD(HC) Manifolds

5.4.2 Calibration/Sensor Replacement

Sensor replacement requires that a Factory Calibration be preformed. Factory Calibration allows the instrument to properly set
operational parameters for each sensor.

Calibration is the process of setting the instrument up to read accurately when exposed to a target gas. This is a two step
process. A Low Calibration sets clean air reference point and the High Calibration function sets the sensitivity of the
instrument.

Calibration equipment is available from

7.0. A calibration adapter will have a fitting for the gas cylinder on one side, and a quick-disconnect to attach to the instrument
on the other.

You may exit the calibration section, at any time, by
calibration section by mistake or calibration gas is not available.

Wait 24 hours after initially supplying air and power to the
open the Front Panel to make adjustment. The calibration functions are operated through the
the front panel.

ENMET

Corporation to calibrate the

pressing and holding

GSM-60

the

sensor before initial calibration. It is not necessary to

GSM-60

OPTION

. A list of needed material is in Section

switch for 3 seconds, if entering

OPTION

and

SELECT

switches on

24

GSM-60

Default Calibration Points

O

S

S

Calibration

Select (Gas)

MAINTENANCE MENU

Calibration

CO:XX11

LowCal:

0

000

S

each digit

CO:XX14

HiCal:

0

000

S

each digit

After entering a valid password to maintenance menu, see
by pressing the

SELECT

switch.

Section 5.2.1

, the calibration section is the first menu section; enter

Supply sensor with clean air for LowCal/ZeroCal setting and apply calibration gas for HiCal/SpanGas setting.



Press the



Press and

SELECT

Hold

the

switch "

OPTION

Calibration Select

XX

" is displayed.

XX =

the gas to be calibrated

switch, until the letter F appears in the upper right hand corner of the display. The F indicates

that the instrument is in the Factory Calibration Mode.



Press the



Press the

0

" is displayed in the lower portion of display. This is the LowCal setting,

OPTION
SELECT

switch, if needed, to change to the gas to be calibrated.

switch, the gas & current reading are displayed in upper portion of display. The mV reading & "

usually zero

, clean air must be supplied to the
sensor. This reading needs to be at or near zero. If it is not then a cylinder of clean 20.9 air should be used. See Figure 7
if this is required.



Press the
to "

HiCal

SELECT

switch, that moves the cursor one digit to the right when the last digit is accepted the display will move

xx

" gas calibration. xx = the level of gas to be used for calibration. The mV reading is shown in the upper right

hand corner of the display.



Apply calibration gas to sensor. See



Press the

SELECT

switch, that moves the cursor one digit to the right, when the last digit is accepted and the calibration is

Figure 7

. After about 1 minute and mV reading has stabilized.

successful the display will momentarily show Cal OK then slope and off set readings, before returning to the Calibration
Menu

Repeat above steps for each channel to be calibrated.

*N

OTE

:

Instruments equipped with an oxygen sensor programmed with a range of 0 to 15% by volume require 99.999 % Nitrogen

(

ENMET

(

ENMET

To continue on too next section Press the



Press

Corporation part number 03295-100) be used for the LowCal/ZeroXCal setting and 5% by volume Oxygen
part number 03296-050) be used for HiCal/Span setting

OPTION

OPTION

switch until “Exit maint menu” appears and then press

switch.

SELECT

switch to return the instrument to the

Operational Display

Example:

From Valid Password Entry

Full Calibration Flow Chart, for CO

Press O

O

Calibrated

PTION

until the gas to be

is displayed

Gas LowCal HiCal

CO 0 20
O2 N/A* 20.9*
CO2 0 1000
HC 0 10

ENMET

Corporation

LowCal

25

O

= Press Option

S = Press Select

GSM-60 ENMET Corporation

Cylinder Valve

Calibration/Sample Port

Quick Disconnect

Calibration Adepter with Humidifier

- MOS

N

OTE

:

Fitting

With twin tube input, the non-calibration

line must be plugged.

2 places

and Regulator

Cylinder of Gas

Humidifier

GSM-60 with O

Example of Regulator

Plug

To Cylinder of Gas

PTIONAL TWIN TUBE INPUT

Figure 7: GSM-60 Calibration Connections

Calibration Process for MOS Sensors

The following calibration procedure must be followed whenever a 60 series part number appear in the part number of the
instrument, examples 04652-6200-0000, 04652-7083-6000
Humidification is required when calibration is performed. In addition to the standard flow demand regulator, cylinder of
calibration gas you need ENMET humidifier assembly part number 037000-000

 Fill the humidifier with clean water to about ¾ full, connect the flow demand regulator to one side of the humidifier and

connect the other side of the humidifier to the GSM-60 calibration/sampling port.

Warning: Be sure that the flow direction is correct, note the arrow on the humidifier, failure to do so will cause damage to the

GSM-60 instrument

 With the cylinder regulator and humidifier assembled follow the above steps to complete the calibration process

5.4.3A Low Cal/ZeroCal Adjust

A Low Cal function should be performed only when the GSM-60 sensor are exposed to clean uncontaminated air. Use a
cylinder of 20.9% oxygen to provide a clean air reference if necessary. Attach the cylinder to the calibration adapter, attach the
adapter to the instrument and allow gas to flow over the sensor for up to 4 minutes.

Enter the maintenance menu by repeatedly pressing

GSM-60 Maintenance Menu flow chart.

The first menu available is the Low Cal/ZeroCal.
Press the

SELECT

switch 4 times to perform a Low Cal.

 If the Low Cal/ZeroCal is successful, The display will change to Hi Cal/SpanGas.

If you wish to Hi Cal/SpanGas the sensor apply calibration gas. Proceed to gas calibration Section 5.3.1B
If you wish to Exit the maintenance menu, Press and hold
release. Then press

OPTION

switch until “Exit maint menu” appears and then press

the Operational Display

 If the Low Cal/ZeroCal is Not successful, sensor is outside of safe parameters to Low Cal, a “SLP/Off Set err” will be

indicated. Repeat Section 5.3.1 Low Cal/ZeroCal Adjust making sure to use a cylinder of 20.9% Oxygen.

OPTION

switch, until the maintenance menu is displayed. See Figure 6,

OPTION

switch until the Maintenance Menu is displayed then

SELECT

switch to return the instrument to

26

GSM-60 ENMET Corporation

5.4.4B High Cal/SpanGas Adjust

A High Cal/Span Gas should only be preformed after a successful Low Cal/ZeroCal has been completed.

 Press the

SELECT

switch, that moves the cursor one digit to the right when the last digit is accepted the display will move

to "HiCal xx" gas calibration. xx = the level of gas to be used for calibration. The mV reading is shown in the upper right
hand corner of the display.

 Apply calibration gas to sensor. See Figure 7. After about 1 minute and mV reading has stabilized.
 Press the

SELECT

switch, that moves the cursor one digit to the right, when the last digit is accepted and the calibration is
successful the display will momentarily show Cal OK then slope and off set readings, before returning to the Calibration
Menu

Repeat above steps for each channel to be calibrated.
To continue on too next section Press the

 Press

OPTION

switch until “Exit maint menu” appears and then press

OPTION

switch.

SELECT

switch to return the instrument to the

Operational Display

5.5 Flow Control Orifice

A 0.0225-inch diameter orifice is used to set the flow rate. In well-maintained medical air systems, this orifice should not clog.
However, if difficulty is experienced in maintaining flow rate examine this orifice; replace it if necessary.

Orifice location will depend on instrument sensor configuration.

6.0 Technical Data and Specifications

N

OTE

: All specifications stated in this manual may change without notice.

Electrical Power

Storage and
Transport

Operation

Mechanical

Outputs

Examples of Sensors Type Range

*N

OTE

: Response time is dependent on sampling length.

15 Amp fused branch circuit
100-240 VAC

0.9 A
50/60 Hz
Board Mounted Fuse FH2, 0.630A, 5 x 20mm

Temperature:
preferred
Relative Humidity
Atmospheric Pressure
Temperature:
Relative Humidity
Atmospheric Pressure
Dimensions:
Weight:
Material:
Strain relief:

Relays:

Analog:
Digital:
Audio:

CO 0 – 50 ppm T90 = 30 seconds 1 – 3 years
O2 0 – 30% T90 = 15 seconds 1 – 2 years
CO2 0 – 5000 ppm T90 = 30 seconds 3 – 5 years
HC 0 – 100 ppm T90 = 30 seconds 1 – 2 years
Others

-20° to +60°C (-4° to +140°F)
0° to +20°C (32° to 68°F)
0 - 99% RH, non-condensing
20 to 36 inHg (68 to 133 kPa)
0° to +40°C (32° to +104°F)
0 - 99% RH, non-condensing
20 to 36 inHg (68 to 133 kPa)
11 x 9 x 8 inches (27.9 x 22.9 x 20.3 cm)
8 lbs (3.6 kg)
Engineered thermoplastic with hinged front cover
5 – 12 mm OD
SPDT

Resistive Load Inductive Load
10A at 110 VAC 7.5A at 110 VAC
10A at 30 VDC 5A at 30 VDC

4-20 mA x 3
RS-232 – Modbus

RS-485 – Modbus
95 db at 2 ft

*

Typical Response Time

Contact ENMET Corporation

Life

27

GSM-60 ENMET Corporation

7.0 Replacement Part Numbers

7.1 ENMET part numbers for sensors and replacement parts:

Part number Description

03053-000 Sensor, CO2
67025-1114 Sensor, Oxygen
03015-014 Sensor, MOS 812
03016-014 Sensor, MOS 813
03028-XXX Sensor, PID, 10.6 eV

Contact ENMET Corporation

67025-XXXX Sensor, Toxic

Contact ENMET Corporation

03028-005 Sensor, Replacement lamp, PID, 10.6 eV
73540-002 Orifice
64002-1000 Fuse, 1.0 Amp 5x20mm
06008-004 Sensor Gasket
65057-011 Terminal plug, 3 position
65057-012 Terminal plug, 4 position
65057-010 Terminal plug, 2 position
73089-004 Filter Assembly, Particulate
04018-128 Pump, Replacement for instrument s/n 118 and above
04018-118 Pump, Replacement for instrument s/n 117 and below

Consult ENMET Corporation or your distributer for more information

7.2 ENMET part numbers for Calibration equipment:

Part number Description

03219-020 Gas Cylinder, 20 ppm CO in air
03296-209 Gas Cylinder, 20.9% oxygen in nitrogen
03510-001 Regulator Assembly, Flow Demand CO, O2 (steel cylinders)
03223-1000 Gas Cylinder, 1000 ppm CO2 in air,
03510-002 Regulator Assembly, Flow Demand CO2 (aluminum cylinders)
03290-010 Gas Cylinder, 10 ppm Isobutylene in air

Consult ENMET Corporation or your distributer for more information

28

GSM-60 ENMET Corporation

8.0 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 is 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
80003-600

May 2007
MCN-371, 06/06/07
MCN-396, 02/14/08
MCN-404, 07/22/08
MCN-441, 11/30/10
MCN-445, 02/11/11
MCN-456, 08/05/11
MCN-470, 12/10/12

29

GSM-60 ENMET Corporation

Appendix A: CO Characteristics

The Characteristics and Effects of Carbon Monoxide
Carbon monoxide is a colorless odorless toxic gas generated by incomplete combustion of a hydrocarbon fuel in air. It may be

present where internal combustion engines, furnaces, boilers, and other combustion devices are present. It is toxic when
inhaled because of its great affinity to hemoglobin, the oxygen carriers in the red cells of the blood. CO replaces the oxygen
normally carried by the hemoglobin, and thus inhibits the delivery of oxygen throughout the body; the victim suffers from
oxygen deficiency, and may die from asphyxiation. The symptoms and degree of danger resulting from exposure to CO depend
upon the concentration of the gas and the length of exposure; this is shown in Figure 10. The GSM-60 instrument is employed
to warn the user of the presence of CO, and to facilitate the assessment of the degree of danger that he or she is exposed to.

Based upon knowledge of the effects of CO, the Occupational Safety and Health Authority (OSHA) has set limits on exposure
to CO in the workplace. These are 35 ppm (parts CO per million parts air) as an time weighted average for an eight hour day,
and a maximum exposure of 200 ppm. For compressed air line applications, OSHA requires Grade D breathing air supplied,
using a Compressed Gas Association (CGA) definition (G-7.1). Depending on interpretation of the OSHA respiratory standard,
10 ppm and 20 ppm CO have been used as maximum limits and standard instrument alarm points.

If a CO sensor is installed, the GSM-60 has two preset alarm set points, at 10 ppm and 20 ppm CO, which are adjustable, but
cannot be set below 5 ppm or above 50 ppm.

The curves below are for percent Carboxyhemaglobin with 50% being the top curve, 5% the bottom. %COHb is a measure of
the amount of hemoglobin occupied by CO rather than oxygen. CO effects upon children, adults engaging in physical activity,
and smokers, are more pronounced.

Figure 10: Carbon Monoxide Concentration

30

GSM-60 ENMET Corporation

IP (eV)

IP (eV)

Appendix B: Gas Ionization Potentials

Chemical Name
A

2-Amino pyridine 8.00 p-tert-Butyltoluene 8.28
Acetaldehyde 10.21 s-Butyl amine 8.70
Acetamide 9.77 s-Butyl benzene 8.68
Acetic acid 10.69 sec-Butyl acetate 9.91
Acetic anhydride 10.00 t-Butyl amine 8.64
Acetone 9.69 t-Butyl benzene 8.68
Acetonitrile 12.20 trans-2-Butene 9.13
Acetophenone 9.27

Acetyl bromide 10.55 1-Chloro-2-methylpropane 10.66
Acetyl chloride 11.02 1-Chloro-3-fluorobenzene 9.21
Acetylene 11.41 1-Chlorobutane 10.67
Acrolein 10.10 1-Chloropropane 10.82
Acrylamide 9.50 2-Chloro-2-methylpropane 10.61
Acrylonitrile 10.91 2-Chlorobutane 10.65
Allyl alcohol 9.67 2-Chloropropane 10.78
Allyl chloride 9.90 2-Chlorothiophene 8.68
Ammonia 10.20 3-Chloropropene 10.04
Aniline 7.70 Camphor 8.76
Anisidine 7.44 Carbon dioxide 13.79
Anisole 8.22 Carbon disulfide 10.07
Arsine 9.89 Carbon monoxide 14.01

B

1,3-Butadiene (butadiene) 9.07 Chlorine 11.48
1-Bromo-2-chloroethane 10.63 Chlorine dioxide 10.36
1-Bromo-2-methylpropane 10.09 Chlorine trifluoride 12.65
1-Bromo-4-fluorobenzene 8.99 Chloroacetaldehyde 10.61
1-Bromobutane 10.13 α-Chloroacetophenone 9.44
1-Bromopentane 10.10 Chlorobenzene 9.07
1-Bromopropane 10.18 Chlorobromomethane 10.77
1-Bromopropene 9.30 Chlorofluoromethane (Freon 22) 12.45
1-Butanethiol 9.14 Chloroform 11.37
1-Butene 9.58 Chlorotrifluoromethane (Freon 13) 12.91
1-Butyne 10.18 Chrysene 7.59
2,3-Butadione 9.23 Cresol 8.14
2-Bromo-2-methylpropane 9.89 Crotonaldehyde 9.73
2-Bromobutane 9.98 Cumene (isopropyl benzene) 8.75
2-Bromopropane 10.08 Cyanogen 13.80
2-Bromothiophene 8.63 Cyclohexane 9.80
2-Butanone (MEK) 9.54 Cyclohexanol 9.75
3-Bromopropene 9.70 Cyclohexanone 9.14
3-Butene nitrile 10.39 Cyclohexene 8.95
Benzaldehyde 9.53 Cyclo-octatetraene 7.99
Benzene 9.25 Cyclopentadiene 8.56
Benzenethiol 8.33 Cyclopentane 10.53
Benzonitrile 9.71 Cyclopentanone 9.26
Benzotrifluoride 9.68 Cyclopentene 9.01
Biphenyl 8.27 Cyclopropane 10.06
Boron oxide 13.50 m-Chlorotoluene 8.83
Boron trifluoride 15.56 o-Chlorotoluene 8.83
Bromine 10.54 p-Chlorotoluene 8.70
Bromobenzene 8.98

Bromochloromethane 10.77 1,1-Dibromoethane 10.19
Bromoform 10.48 1,1-Dichloroethane 11.12
Butane 10.63 1,1-Dimethoxyethane 9.65
Butyl mercaptan 9.15 1,1-Dimethylhydrazine 7.28
cis-2-Butene 9.13 1,2-Dibromoethene 9.45
m-Bromotoluene 8.81
n-Butyl acetate 10.01 1,2-Dichloroethane 11.12
n-Butyl alcohol 10.04 1,2-Dichloropropane 10.87
n-Butyl amine 8.71 1,3-Dibromopropane 10.07
n-Butyl benzene 8.69 1,3-Dichloropropane 10.85
n-Butyl formate 10.50 2,2-Dimethyl butane 10.06
n-Butyraldehyde 9.86 2,2-Dimethyl propane 10.35
n-Butyric acid 10.16 2,3-Dichloropropene 9.82
n-Butyronitrile 11.67 2,3-Dimethyl butane 10.02
o-Bromotoluene 8.79 3,3-Dimethyl butanone 9.17
cis-Dichloroethene 9.65

p-Bromotoluene 8.67

Chemical Name

C

Carbon tetrachloride 11.47

D

1,2-Dichloro-1,1,2,2-tetrafluoroethane (Freon 114)

12.20

31

GSM-60 ENMET Corporation

IP (eV)

IP (eV)

Chemical Name

(D continued)

Decaborane 9.88 2-Furaldehyde 9.21
Diazomethane 9.00 Fluorine 15.70
Diborane 12.00 Fluorobenzene 9.20
Dibromochloromethane 10.59 Formaldehyde 10.87
Dibromodifluoromethane 11.07 Formamide 10.25
Dibromomethane 10.49 Formic acid 11.05
Dibutylamine 7.69 Freon 11 (trichlorofluoromethane) 11.77
Dichlorodifluoromethane (Freon 12) 12.31 Freon 112 (1,1,2,2-tetrachloro-1,2-difluoroethane) 11.30
Dichlorofluoromethane 12.39 Freon 113 (1,1,2-trichloro-1,2,2-trifluororethane) 11.78
Dichloromethane 11.35 Freon 114 (1,2-dichloro-1,1,2,2-tetrafluoroethane) 12.20
Diethoxymethane 9.70 Freon 12 (dichlorodifluoromethane) 12.31
Diethyl amine 8.01 Freon 13 (chlorotrifluoromethane) 12.91
Diethyl ether 9.53 Freon 22 (chlorofluoromethane) 12.45
Diethyl ketone 9.32 Furan 8.89
Diethyl sulfide 8.43 Furfural 9.21
Diethyl sulfite 9.68 m-Fluorotoluene 8.92
Difluorodibromomethane 11.07 o-Fluorophenol 8.66
Dihydropyran 8.34 o-Fluorotoluene 8.92
Diiodomethane 9.34 p-Fluorotoluene 8.79
Diisopropylamine 7.73

Dimethoxymethane (methylal) 10.00 1-Hexene 9.46
Dimethyl amine 8.24 2-Heptanone 9.33
Dimethyl ether 10.00 2-Hexanone 9.35
Dimethyl sulfide 8.69 Heptane 10.08
Dimethylaniline 7.13 Hexachloroethane 11.10
Dimethylformamide 9.18 Hexane 10.18
Dimethylphthalate 9.64 Hydrazine 8.10
Dinitrobenzene 10.71 Hydrogen 15.43
Dioxane 9.19 Hydrogen bromide 11.62
Diphenyl 7.95 Hydrogen chloride 12.74
Dipropyl amine 7.84 Hydrogen cyanide 13.91
Dipropyl sulfide 8.30 Hydrogen fluoride 15.77
Durene 8.03 Hydrogen iodide 10.38
m-Dichlorobenzene 9.12 Hydrogen selenide 9.88
N,N-Diethyl acetamide 8.60 Hydrogen sulfide 10.46
N,N-Diethyl formamide 8.89 Hydrogen telluride 9.14
N,N-Dimethyl acetamide 8.81 Hydroquinone 7.95
N,N-Dimethyl formamide 9.12

o-Dichlorobenzene 9.06 1-Iodo-2-methylpropane 9.18
p-Dichlorobenzene 8.95 1-Iodobutane 9.21
p-Dioxane 9.13 1-Iodopentane 9.19
trans-Dichloroethene 9.66 1-Iodopropane 9.26

E

Epichlorohydrin 10.20 2-Iodopropane 9.17
Ethane 11.65 Iodine 9.28
Ethanethiol (ethyl mercaptan) 9.29 Iodobenzene 8.73
Ethanolamine 8.96 Isobutane 10.57
Ethene 10.52 Isobutyl acetate 9.97
Ethyl acetate 10.11 Isobutyl alcohol 10.12
Ethyl alcohol 10.48 Isobutyl amine 8.70
Ethyl amine 8.86 Isobutyl formate 10.46
Ethyl benzene 8.76 Isobutyraldehyde 9.74
Ethyl bromide 10.29 Isobutyric acid 10.02
Ethyl chloride (chloroethane) 10.98 Isopentane 10.32
Ethyl disulfide 8.27 Isophorone 9.07
Ethyl ether 9.51 Isoprene 8.85
Ethyl formate 10.61 Isopropyl acetate 9.99
Ethyl iodide 9.33 Isopropyl alcohol 10.16
Ethyl isothiocyanate 9.14 Isopropyl amine 8.72
Ethyl mercaptan 9.29 Isopropyl benzene 8.69
Ethyl methyl sulfide 8.55 Isopropyl ether 9.20
Ethyl nitrate 11.22 Isovaleraldehyde 9.71
Ethyl propionate 10.00 m-Iodotoluene 8.61
Ethyl thiocyanate 9.89 o-Iodotoluene 8.62
Ethylene chlorohydrin 10.52 p-Iodotoluene 8.50
Ethylene diamine 8.60

Ethylene dibromide 10.37 Ketene 9.61
Ethylene dichloride 11.05

Ethylene oxide 10.57 2,3-Lutidine 8.85
Ethylenelmine 9.20 2,4-Lutidine 8.85
Ethynylbenzene 8.82 2,6-Lutidine 8.85

Chemical Name
F

H

I

2-Iodobutane 9.09

K
L

32

GSM-60 ENMET Corporation

IP (eV)

IP (eV)

Chemical Name
M

2-Methyl furan 8.39 2-Pentanone 9.38
2-Methyl napthalene 7.96 2-Picoline 9.02
1-Methyl napthalene 7.96 3-Picoline 9.02
2-Methyl propene 9.23 4-Picoline 9.04
2-Methyl-1-butene 9.12 n-Propyl nitrate 11.07
2-Methylpentane 10.12 Pentaborane 10.40
3-Methyl-1-butene 9.51 Pentane 10.35
3-Methyl-2-butene 8.67 Perchloroethylene 9.32
3-Methylpentane 10.08 Pheneloic 8.18
4-Methylcyclohexene 8.91 Phenol 8.50
Maleic anhydride 10.80 Phenyl ether (diphenyl oxide) 8.82
Mesityl oxide 9.08 Phenyl hydrazine 7.64
Mesitylene 8.40 Phenyl isocyanate 8.77
Methane 12.98 Phenyl isothiocyanate 8.52
Methanethiol (methyl mercaptan) 9.44 Phenylene diamine 6.89
Methyl acetate 10.27 Phosgene 11.77
Methyl acetylene 10.37 Phosphine 9.87
Methyl acrylate 9.90 Phosphorus trichloride 9.91
Methyl alcohol 10.85 Phthalic anhydride 10.00
Methyl amine 8.97 Propane 11.07
Methyl bromide 10.54 Propargyl alcohol 10.51
Methyl butyl ketone 9.34 Propiolactone 9.70
Methyl butyrate 10.07 Propionaldehyde 9.98
Methyl cellosolve 9.60 Propionic acid 10.24
Methyl chloride 11.28 Propionitrile 11.84
Methyl chloroform (1,1,1-trichloroethane) 11.00 Propyl acetate 10.04
Methyl disulfide 8.46 Propyl alcohol 10.20
Methyl ethyl ketone 9.53 Propyl amine 8.78
Methyl formate 10.82 Propyl benzene 8.72
Methyl iodide 9.54 Propyl ether 9.27
Methyl isobutyl ketone 9.30 Propyl formate 10.54
Methyl isobutyrate 9.98 Propylene 9.73
Methyl isocyanate 10.67 Propylene dichloride 10.87
Methyl isopropyl ketone 9.32 Propylene imine 9.00
Methyl isothiocyanate 9.25 Propylene oxide 10.22
Methyl mercaptan 9.44 Propyne 10.36
Methyl methacrylate 9.70 Pyridine 9.32
Methyl propionate 10.15 Pyrrole 8.20
Methyl propyl ketone 9.39

-Methyl styrene 8.35 Quinone 10.04
Methyl thiocyanate 10.07

Methylal (dimethoxymethane) 10.00 Stibine 9.51
Methylcyclohexane 9.85 Styrene 8.47
Methylene chloride 11.32 Sulfur dioxide 12.30
Methyl-n-amyl ketone 9.30 Sulfur hexafluoride 15.33
Monomethyl aniline 7.32 Sulfur monochloride 9.66
Monomethyl hydrazine 7.67 Sulfuryl fluoride 13.00
Morpholine 8.20

n-Methyl acetamide 8.90 o-Terphenyls 7.78

N

1-Nitropropane 10.88 1,1,1-Trichloroethane 11.00
2-Nitropropane 10.71
Naphthalene 8.12 2,2,4-Trimethyl pentane 9.86
Nickel carbonyl 8.27 o-Toluidine 7.44
Nitric oxide, (NO) 9.25 Tetrachloroethane 11.62
Nitrobenzene 9.92 Tetrachloroethene 9.32
Nitroethane 10.88 Tetrachloromethane 11.47
Nitrogen 15.58 Tetrahydrofuran 9.54
Nitrogen dioxide 9.78 Tetrahydropyran 9.25
Nitrogen trifluoride 12.97 Thiolacetic acid 10.00
Nitromethane 11.08 Thiophene 8.86
Nitrotoluene 9.45 Toluene 8.82
p-Nitrochloro benzene 9.96 Tribromoethene 9.27

O

Octane 9.82 Tribromomethane 10.51
Oxygen 12.08 Trichloroethene 9.45
Ozone 12.08 Trichloroethylene 9.47

P

1-Pentene 9.50 Trichloromethane 11.42
1-Propanethiol 9.20 Triethylamine 7.50
2,4-Pentanedione 8.87 Trifluoromonobromo-methane 11.40

Chemical Name
(P continued)

Q
S

T

Tribromofluoromethane 10.67

Trichlorofluoromethane (Freon 11) 11.77

1,1,2,2-Tetrachloro-1,2-difluoroethane (Freon 112)

1,1,2-Trichloro-1,2,2-trifluoroethane (Freon 113)

11.30

11.78

33

GSM-60 ENMET Corporation

IP (eV)

IP (eV)

Chemical Name

(T continued)

Trimethyl amine 7.82 Water 12.59
Tripropyl amine 7.23

V

o-Vinyl toluene 8.20 m-Xylene 8.56
Valeraldehyde 9.82 o-Xylene 8.56
Valeric acid 10.12 p-Xylene 8.45
Vinyl acetate 9.19
Vinyl bromide 9.80
Vinyl chloride 10.00
Vinyl methyl ether 8.93

2,4-Xylidine 7.65

Chemical Name
W

X

Notes:

34

PO Box 979
680 Fairfield Court
Ann Arbor, Michigan 48106-0979

734.761.1270 Fax [phone]

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.

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: _______________________

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___________________________________

ENMET Corporation
Attn: Repair Department
680 Fairfield Court
Ann Arbor, Michigan 48108

Your Shipping Address:

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: $_________________