Gas Measurement Instruments PS1 User Manual

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Quick Operation Guide

INTRODUCTION

The PS1 is a personal safety device that
warns when toxic gas or oxygen exceeds
alarm set-points. It is the responsibility of
the user to respond properly to the alarms.

This Quick Operation Guide explains
how to operate your PS1 and use its key
features. You can learn more about the
PS1 features and download the full user
handbook at:

www.gmiuk.com

Part No: 63184 Issue: 2

Copyright © Gas Measurement Instruments Ltd 2013

GAS TYPES

There are four PS1 gas models available:

1. Hydrogen Sulphide (H2S)

2. Oxygen (O2)

3. Carbon Monoxide (CO)

4. Sulphur Dioxide (SO2)

The model is clearly identied on the front

housing of the device:

FEATURES

The key features of the PS1 are:

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GMI Ltd, RENFREW, PA4 9RG, UK www.gmiuk.com

READ MANUAL BEFORE USE. GAS DETECTOR FOR USE IN
HAZARDOUS LOCATIONS ONLY AS TO INTRINSIC SAFETY
LOCATIONS CLASS 1 DIV 1 GROUP ABCD T4

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II 1G 39Y7

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1. Gas sample inlet

2. Test button

3. LCD

4. Visible alarm

5. ON & function button

6. Audible alarm

7. Inlet nozzle

8. Alligator clip

9. Certication label

SIRA07ATEX2208
IECEx SIRA07.0073
Ex ia IIC T4 Ga

SWITCHING ON / OFF

Before switching on, check the PS1 is
clean and in good condition.

To switch ON, press and hold for 1
second, in fresh air. The PS1 will begin its

warm up sequence.

Ser. No. 000000

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During the warm up sequence, a sensor
check and auto zero are undertaken.
When PPM or % reading appears, the

instrument is ready to use.

SUPPORT

Head Ofce

Inchinnan Business Park
Renfrew
Scotland
PA4 9RG
Tel: [phone]
Fax: [phone]

[e-mail]
www.gmiuk.com

Service & Sales - USA

4055 Technology Forest Blvd.
The Woodlands
TX 77381
USA
Tel: [phone]
Fax: [phone]

Toll Free: [phone]

[e-mail]

To switch OFF press and hold both and

simultaneously for 3 seconds.

LIFE REMAINING

The life remaining is displayed as months.
If less than 1 month, it is displayed as

days.

Note: Remaining months / days will

be reduced if signicant alarm

operation occurs.

BACKLIGHT

Press to switch the backlight on.
It remains on for 3 seconds then

automatically switches off.

Note: Life remaining is dependent on

backlight usage.

SELF TEST

Press and hold to perform a self test.
During the self test:

• All segments of the LCD will be shown

• Buzzer will beep

• LED’s will ash

• PS1 will vibrate

On completion, the PS1 will return to the
normal operation screen.

Note: A self test cannot be performed

while an alarm is active.

MAXIMUM VALUES

To view the maximum gas reading since

switch on, press once to switch the
backlight on.
Press again to view the maximum

value.

Note: Oxygen also has a minimum value.

To clear the maximum reading, press and
hold . The reading will be reset to zero
(or 20.9% for Oxygen).

ALARMS

If an alarm occurs, the audible and visible
alarms will be activated. The type of alarm
is indicated at the top of the screen and

the current reading on the display.

By default, alarms are non latching and
reset automatically once the reading is
safe.

To mute a non latching alarm, press and
hold .

To acknowledge (clear), a latching alarm,
press and hold when the gas reading

is safe.

BUMP / CALIBRATION

The optional PS1 Automatic Bump and
Calibration Station provides:

• Simple method of automatically bump
testing or calibrating instruments.

• Controlled delivery of gas.

• Bump / calibration records stored.

Before performing a Bump / Calibration
Test, the PS1 must be put into test mode.

To enter test mode, switch on by pressing
and holding both and simultaneously.
‘tESt’ will be present on the display after

the warm up sequence is complete.

The PS1 can now be inserted for testing.

SAFETY

• The PS1 must be regularly tested in a safe area,
using a known gas concentration.

• Never expose to extreme heat.

• If the PS1 detects gas, follow your own organisation’s
procedures and operational guidelines.

• PS1 instruments are certied as:

ATEX II 1 G Ex ia IIC T4

IECEx Ex ia IIC T4 Ga (Ta = -20oC to +50oC)

UL 913 Class I, Div 1 Groups A, B, C and D

Class I, Div 1 Groups A, B, C and D

MED, for oxygen instruments only. Refer to

Declaration of Conformity for details.

• This equipment is designed and manufactured

to protect against other hazards as dened in

paragraph 1.2.7 of Annex II of the ATEX Directive
94/9/EC.

WARNING 1: Do not use in oxygen enriched

WARNING 2: Substitution of components may

Any right of claim relating to product liability or
consequential damage to any third party against GMI
is removed if the warnings are not observed.

Additional Information: please refer to user handbook.
Download from www.gmiuk.com.

atmospheres greater than 21%.

impair intrinsic safety.