TESTO 316-EX Instruction Manual

testo 316-EX · gas leak detector

Instruction manual

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1 Safety and the environment

3

1 Safety and the environment

1.1. About this document

Use

> Please read this documentation through carefully and

familiarize yourself with the product before putting it to use. Pay
particular attention to the safety instructions and warning advice
in order to prevent injuries and damage to the products.

> Keep this document to hand so that you can refer to it when

necessary.

> Hand this documentation on to any subsequent users of the

product.

1.2. Ensure safety

> Do not operate the instrument if there are signs of damage at

the housing, mains unit or feed lines.

> Only operate the product properly, for its intended purpose and

within the parameters specified in the technical data. Do not
use any force.

> Do not store the product together with solvents. Do not use any

desiccants.

> Only use the device in closed, dry rooms and protect it from rain

and moisture.

> Carry out only the maintenance and repair work on this

instrument that is described in the documentation. Follow the
prescribed steps exactly. Use only original spare parts from
Testo.

1.3. Protecting the environment

> Dispose of faulty rechargeable batteries/spent batteries in

accordance with the valid legal specifications.

> At the end of its useful life, send the product to the separate

collection for electric and electronic devices (observe local
regulations) or return the product to Testo for disposal.

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2 Specifications

4

2 Specifications

2.1. Use

The testo 316-EX is a gas leak detector for the short-term detection
of gases in areas at risk of explosion according to Directive
94/9/EC (ATEX).

Areas of application are the gas detection in rooms and the location
of leaks at gas systems. The instrument is designed for use by
trained personnel.

For operation in areas at risk of explosion, also observe the

Safety instructions document.

Explosion limits of flammable substances

A flammable substance in the air has a lower explosion limit (LEL)
and an upper explosion limit (UEL). The air/gas mixture is
flammable anywhere between these two limits, potentially leading
to an explosion (critical range). Below the LEL, the mixture is too
lean for an explosion, and above the UEL it is too rich (non-critical
range).

The explosion limits depend on the substance:

• Methane CH4: LEL 4.4 vol% / UEL 16.5 vol%

• Propane C3H8: LEL 1.7 vol% / UEL 10.9 vol%

• Hydrogen H2: LEL 4.0 vol% / UEL 77.0 vol%

Restrictions of the application range

Do not use the instrument as a monitoring instrument for personal
safety! The testo 316-EX is no protective equipment!

Do not use the instrument as a gas analyzer! The sensor detects
almost all flammable gases to the same extent.

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2 Specifications

5

2.2. Technical data

Characteristic Values

Type Semi-conductor

Response threshold 1 ppm

Reaction time (t90) 14 s

Measuring range Methane CH4: 0 ppm up to 2.5 vol%

Propane C3H8: 0 ppm up to 1.0 vol%
Hydrogen H2: 0 ppm up to 2.0 vol%

Accuracy (at 20 to
50 % RH, 0 to
40 °C/32 to 104 °F)

at 100 ppm: -50 ppm to +150 ppm
at 0.1 vol%: -250 ppm to +0.2 vol%

Accuracy (at
20…50 % RH,

-10 to 0 °C/
14 to 32 °F)

at 100 ppm: -60 ppm to +150 ppm
at 1,0 Vol%: -0,4 Vol% to +0,3 Vol%

Accuracy at 50%
LEL (at 20 to 50 %
RH, 0 to 40 °C/
32 to 104 °F)

CH4 (2.2 Vol%): -0.2 to +0.2 Vol%
C3H8 (1.0 Vol%): -0.2 to +0.3 Vol%
H2 (2.0 Vol%): -0.2 to +0.2 Vol%

Resolution at 0 to 999 ppm: 1 ppm

at 0.1 to 2.5 vol%: 0.1 vol%

Power supply 2 x 1.5 V mignon/AA

Type approved for use in areas at
risk of explosion: Camelion
Alkaline PLUS AA

Battery life approx. 6 h (typical)

Storage/transport
conditions

-10 to 50 °C / 14 to 122 °F
0 to 70 % RH

Operating
conditions

-10 to 40 °C / 14 to 104 °F
20 to 80 % RH not condensing

Weight approx. 200 g/0.44 lb. (incl. battery)

Dimensions (L x W
x H)

Housing: approx. 135 x 45 x 25 mm /

5.31 x 1.77 x 0.99"
Long, flexible sensor shaft including

sensor head: approx. 200 mm/7.87"

Protection class IP54

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2 Specifications

6

Characteristic Values

Warranty

2 years, warranty conditions: see
www.testo.com/warranty

EC Directives 94/9/EC (ATEX)

2014/30/EC

ATEX instrument
labelling

1258 II 2 G Ex ib IIC T1

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3 Product description

7

3 Product description

3.1. Overview

1 Sensor head with gas sensor and exchangeable protection cap
2 Flexible sensor shaft
3 Alarm LED
4 Display
5 Readiness LED
6 Battery compartment (on rear)

7 Control key
8 On/off switch

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4 First steps

8

4 First steps

4.1. Commissioning

Inserting batteries

✓ The instrument is switched off.

1. Open battery compartment (on rear of instrument) using
enclosed Allen key.

Battery type approved for use in areas at risk of explosion:
Camelion Alkaline PLUS AA

2. Insert batteries/rechargeable batteries (observe the polarity!).

3. Close battery compartment, tighten Allen head bolt by hand.

4.2. Getting to know the product

Switching on

Only switch on the instrument in fresh air as an automatic zeroing
is performed at the end of the warm-up time. The ambient
temperature during zeroing should correspond to the temperature
at the measuring location. If required, zero again manually at the
measuring location.

When not in use for a long period of time, the sensor
becomes contaminated due to oxidation, causing the zero
point to become unstable. If the instrument has not been in
operation for a long period of time (> 2 weeks), it must be
switched on approx. 30‑45 minutes before use and
thereafter zeroed manually.

If the instrument has been stored at temperatures <0
°C/<32 °F, it must be switched on 10 minutes before use

and thereafter zeroed manually.

> Push up on/off switch on the right side of the instrument.

- The sensor is warmed up (duration: approx. 60 s).
During the warm-up time, the following information is shown in
succession:

• All segments light up. Display segment test

• WAIT: wait

• V3.03 (example): firmware version (important information in

the event of service)

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4 First steps

9

• T126 (example): sensor table version (important information
in the event of service)

• PPM: measuring unit, alarm LED (red) and status LED
(green) alternately light up

• Display light is switched on

• 152 (example): check value (important information in the

event of service)

• CH4 (methane), C3H8 (propane) or H2 (hydrogen): set gas
type

• EN (English), DE (German), FR (French), ES (Spanish), IT
(Italian) or CS (Czech): set instrument language

• batt and bar graph: remaining battery capacity

• NP and two short signal tones: automatic zeroing is

performed

- The instrument is ready for use if the status LED (green) lights
up and a reading is shown in the display.

- With ToN3 (readiness tone) function activated, a short signal

tone is also emitted every 20 s as an indication of the readiness

for operation.

Switching off

> Push down on/off switch on the right side of the instrument.

Set language

The instrument language is set to EN (English) in the condition on
delivery. Proceed as follows to change the instrument language:

✓ The instrument is in the measurement view.

1. Press and hold [--> 0 <--] for approx. 8 s until a pulsed signal
tone sequence sounds.

2. Repeatedly press [--> 0 <--] briefly until LANGUA is shown.

3. Press and hold [--> 0 <--] until the display changes.

4. Repeatedly press [--> 0 <--] briefly until the desired language is
shown: EN (English), DE (German), FR (French), ES (Spanish),

IT (Italian) or CS (Czech).

5. Press and hold [--> 0 <--] until the display changes.

- EXIT is displayed.

6. Press and hold [--> 0 <--] until the display changes.

- The instrument is once again in measurement view.

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5 Using the product

10

5 Using the product

5.1. Performing settings

Open configuration menu

✓ The instrument is in measurement view.

> Press and hold [--> 0 <--] for approx. 8 s until a pulsed signal

tone sequence sounds.

- The instrument is in configuration view.

Selecting, opening and setting functions

> To select the next function: Briefly press [--> 0 <--].
> To open the selected function: Press and hold [--> 0 <--] until

the display changes.
> To set the opened function: Briefly press [--> 0 <--].
> To end the function: Press and hold [--> 0 <--] until the display

changes.

Adjustable functions

Ensure correct settings: All settings are applied
immediately; there is no cancel function.

Function Setting options/comments

LIGHT (display

light)

OFF (display light cannot be activated) or ON

(display light can be activated)

SOUND1 (alarm

tone)

ON (acoustic alarm on) or OFF (acoustic

alarm off).
The frequency sequence of the alarm tone

becomes faster with a higher concentration.

ALARM (alarm

threshold)

Any value within the measuring range.

If a value above the measuring range
final value is set: The alarm tone
sounds after reaching the measuring
range final value (CH4: 2.5 vol%,
C3H8: 1.0 vol%, H2: 2.0 vol%).

The respective flashing number can be set;
the number that can be set changes if a
button is not pressed for 5 s.

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5 Using the product

11

Function Setting options/comments

PROBE (detection

characteristic curve)

CH4 (methane), C3H8 (propane) or
H2 (hydrogen)

SOUND3

(readiness tone)

OFF (readiness tone off) or ON (readiness

tone on).
A short signal tone every 20 s.

CONTRAST

(display contrast)

Value between 0005 and 0025

LANGUA

(instrument
language)

EN (English), DE (German), FR (French), ES

(Spanish), IT (Italian) or CS (Czech)

Exit (close

configuration menu)

-

5.2. Performing gas detection

CAUTION

Destruction of the sensor by external influences!

> Do not expose the sensor to high concentrations of H

2

S

(hydrogen sulphide), SO

x

(sulphur dioxides), Cl2 (chlorine) or

HCl (hydrogen chloride).

> Avoid contact between alkaline materials or water and the

sensor.

> Avoid the effect of moisture and frost on the sensor.

Have the instrument calibrated by the manufacturer
annually.

Checking natural gas pipelines or hydrogen pipelines:
Methane (the main constituent of natural gas) and
hydrogen are lighter than air. The detection should take
place above the line/the suspected leak.

Checking propane gas pipelines: Propane is heavier than
air. The detection should take place below the line/the
suspected leak, starting from the ground up.

> Guide the sensor head as near as possible and at a low speed

(approx. < 2 cm per second) over the components that are to be
checked for leaks.

- If the set alarm value is exceeded, the Alarm LED lights up red.
If the acoustic alarm is switched on a warning tone also sounds,

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5 Using the product

12

the frequency sequence of which becomes faster as the
concentration increases.

Manually perform zeroing

It is only possible to manually set the zero point if the gas
concentration currently detected is below 1000 ppm.

Gas concentrations present at the point of the zeroing are
suppressed by means of the zeroing. The reading shown
therefore no longer conforms to the gas concentration
actually present.

✓ The instrument is in the measurement view.

> Briefly press [--> 0 <--].

- The zero point is reset.

Switching display light on/off

✓ The instrument is in the measurement view.

✓ The LIGHT function is activated.

> Press and hold [--> 0 <--] until a signal tone sounds.

- The display light is switched on or off.

- The display light automatically goes out if no buttons are

pressed for 2 minutes.

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6 Maintaining the product

13

6 Maintaining the product

Changing the batteries

Do not change the battery in areas at risk of explosion.

✓ The instrument is switched off.

1. Open battery compartment (on rear of instrument) using
enclosed Allen key.

Battery type approved for use in areas at risk of
explosion: Camelion Alkaline PLUS AA

2. Remove empty batteries and insert new batteries (observe the
polarity!).

3. Close battery compartment, tighten Allen head bolt by hand.

Cleaning the instrument

> If the housing of the instrument is dirty, clean it with a damp

cloth.

Do not use any aggressive cleaning agents or solvents! Weak
household cleaning agents and soap suds may be used.

Clean protection cap

Contamination at or in the protection cap can be removed using
compressed air.

CAUTION

Destruction of the sensor

> With the sensor protection cap open, take care that the sensor

is not damaged.

> Do not direct the compressed air jet at the sensor, do not touch

the sensor.

1. Carefully unscrew protection cap from sensor shaft.

2. Blow out protection cap and then screw on again.

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7 Tips and assistance

14

7 Tips and assistance

7.1. Questions and answers

Question Possible causes Possible solution

Error is

displayed.

Instrument error

> Contact Testo

Customer Service or
your dealer.

F30 is shown

and the red
LED lights up

Sensor faulty

> Contact Testo

Customer Service or
your dealer.

Zero point
instable

Contamination of the
sensor due to
oxidation during long
periods of non-use

> Leave instrument

switched on until the
zero point stabilizes
(can take up to
45 minutes).

The instrument
does not
change to
measuring
mode (remains
in the warm-up
phase)

Battery voltage too
low

> Change batteries.

If we could not answer your question, please contact your dealer or
Testo Customer Service. You can find the contact data in the
Internet under: www.testo.com/service-contact

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7 Tips and assistance

15

7.2. Accessories and spare parts

Description Article no.

Camelion Alkaline PLUS AA battery, 1

pc.

Note: 2 batteries are required for the
testo 316-EX

0515 0316

Sensor protection cap 0180 0316

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