AXIOMA METERING UAB QALCOSONIC W1 Parts list manual

ULTRASONIC WATER METER
QALCOSONIC W1
TECHNICAL DESCRIPTION,
INSTALLATION MANUAL AND
USER GUIDE
PE_QW1_V10
AXIOMA METERING UAB
QALCOSONIC W1

EU DECLARATION OF CONFORMITY 3
SAFETY INFORMATION 3
1 APPLICATION FIELD 3
2TECHNICAL DATA 5
2.1 DISPLAY (LCD) 7
2.2 DATA RECORDING AND STORAGE 7
2.3 ALARMS 7
2.4 EXTERNAL COMMUNICATION MODULES AND INTERFACES 8
2.5 METER PULSE OUTPUT 9
2.5.1 PULSE OUTPUT IN TEST MODE VIA OPTICAL INTERFACE 9
2.5.2 PULSE OUTPUT VIA WIRED INTERFACE 9
2.6 POWER SUPPLY 9
2.7 MECHANICAL DATA 10
2.8 OPERATION CONDITIONS 10
3OPERATING PRINCIPLE 10
4MARKING AND SEALING 11
4.1 MARKING 11
4.2 SEALING 11
5INSTALATTION 11
5.1 GENERAL REQUIREMENTS 11
5.2 CHECKING CONFIGURATION OF THE METER 11
5.3 CHECKING OF INSTALLATION AND PARAMETER SETTING 11
5.4 MOUNTING 12
6OPERATION 12
6.1 DISPLAY FUNCTIONS 12
6.2 MENU STRUCTURE 13
6.3 VIEWING THE READINGS IN COMPLETE MODE (USER MENU) 14
6.4 VIEWING THE READINGS IN VERIFICATION (TEST) MODE 15
6.5 VOLUME READINGS IN TEST (VERIFICATION) MODE 15
6.6 ERROR (STATUS) CODES 15
6.7 TEST (VERIFICATION) MODE CONTROL 16
7 VERIFICATION 16
8 TRANSPORTATION AND STORAGE REQUIREMENTS 16
ANNEX A.1 17
ANNEX A.2 18
ANNEX B.1 19
ANNEX B.2 20
ANNEX C.1 21

ANNEX C.2 22
ANNEX C.3 23
ANNEX C.4 24
ANNEX D.1 25
ANNEX D.2 26
ANNEX D.3 27
ANNEX D.4 28
WARRANTY 29

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EU DECLARATION OF CONFORMITY
AXIOMA Metering UAB, Veterinarų str. 52, Biruliškių k., Kaunas district, Lithuania, here by declares that the water meter QALCOSONIC W1
conforms to the essential requirements of the following Directives:
2014/32/EU Directive 2014/32/EU of the European
Parliament and of the Council of 26 February 2014
on the harmonization of the laws of the Member
States relating to the making available on the
market of measuring instruments (recast).
2014/30/EU Directive 2014/30/EU of the European
Parliament and of the Council of 26 February 2014
on the harmonization of the laws of the Member
States relating to electromagnetic compatibility
(recast).
2014/35/EU Directive 2014/35/EU of the European
Parliament and of the Council of 26 February 2014
on the harmonization of the laws of the Member
States relating to the making available on the
market of electrical equipment designed for use
within certain voltage limits.
2014/53/EU Directive 2014/53/EU of the European
Parliament and of the Council of 16 April 2014 on
the harmonization of the laws of the Member
States relating to the making available on the
market of radio equipment.
2011/65/EU Directive 2011/65/EU of the European
Parliament and of the council of 8 June
2011 on the restriction of the use of certain
hazardous substances in electrical and electronical
equipment.
2006/66/EC Directive 2006/66/EC of the European
Parliament and of the council of 6 September 2006
on batteries and accumulators and waste batteries
and accumulators and repealing Directive
91/157/EEC.
2012/19/EU Directive 2012/19/EU of the European
Parliament and of the Council of 4 July 2012 on
waste electrical and electronic equipment (WEEE).
Kaunas, 25-05-2021
EU-Type Examination Certificate No: LT-1621-MI001-034
Quality System Certificate No: KS-1621-MP-003.21
The Notified Body:
L aboratory of Heat Equipment Research and Testing of the Lithuanian Energy Institute, Lithuania, Notified Body Number 1621 .
For EU Customers only - WEEE Marking
Marking of electrical and
electronic equipment in
accordance with Article 14
(2) of Directive 2012/19/EU
It is prohibited to dispose a
meter marked with this sign
into an unsorted municipal waste container
together with other waste!
This symbol on the product indicates that it
will not be treated as household waste. It
must be handed over to the applicable take-
back scheme for the recycling of electrical
and electronic equipment. For more detailed
information about the recycling of this
product, please contact your local municipal
office.
SAFETY INFORMATION
Before beginning of installation works you
must read this document and follow its
instructions.
The meter is battery-powered (3.6 V), risk
factors during the meter installation and
service fluid flowing within flow sensor with
inner pressure up to 1,6 MPa and
temperature up to 90°C.
• Only qualified technical personnel may install
and maintain water meters. Personnel must
be familiar with appropriate technical
documentation and general safety
instructions. It is necessary to follow general
safety requirements during installation and
maintenance process.
• Safety guarantees at installation and service
of meter is:
- Hermetic fitting of primary flow sensor into
the pipeline.
- Reliable fastening of water meter at
installation.
WARNING!
Mounting of the sub-assemblies of water meter is permissible only after ensuring of absence of fluid and pressure in the pipeline.
CAUTION:
If this equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be impaired.
• The meter can be used at ambient
temperature: -15°C ... +70°C
• Storage and transportation temperature:
-25°C ... +70°C (drained flow part)
1 APPLICATION FIELD
Ultrasonic water meter QALCOSONIC W1 is designed for measurement of cold and hot water consumption.
The meter corresponds to essential
requirements of the Technical Regulation
requirements Annexes I and MI 001. The
meter complies with the requirements
of European Standards EN ISO 4064,
requirements of OIML R49-1 and WELMEC 7.2.
CLIMATIC ENVIRONMENTAL
CONDITIONS:
Temperature range : from -15°C to +70°C
Humidity: condensing
Mechanical environment class: M1
Electromagnetic environment class: E2

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_
_
_
_
ORDERING CODE COMBINATION OF THE METER:
_ _
THE RATIO R (Q
3
/Q
1
):
CODE
80
5
160
6
250
1
315
2
400
3
800
4
1000
7
PERMANENT FLOW RATE Q ,
M3/H
3
OVERALL LENGTH L,
MM
END CONNECTIONS
CODE
1,6
80
G ¾
11
1,6
105, 105n*
G ¾
12
1,6
110, 110n*
G ¾
13
1,6
165, 165n*
G ¾
14
1,6
170, 170n*
G ¾
15
2,5
80
G ¾
21
2,5
105, 105n*
G ¾
22
2,5
110, 110n*
G ¾
23
2,5
165, 165n*
G ¾
24
2,5
170, 170n*
G ¾
25
2,5
105, 105n*
G1
31
2,5
110, 110n*
G1
32
2,5
130, 130n*
G1
33
2,5
165, 165n*
G1
34
2,5
190, 190n*
G1
35
4,0
105, 105n*
G1
41
4,0
110, 110n*
G1
42
4,0
130, 130n*
G1
43
4,0
165, 165n*
G1
44
4,0
190, 190n*
G1
45
6,3
260
G1 1/4
46
10
260
G1 1/4
47
6,3
260
G1 1/2
48
10
260
G1 1/2
49
10
300
G2
52
16
300
G2
53
25
300
G2
54
16
200
DN50
55
25
200
DN50
56
40
200
DN50
57
* - different design (Annex B)
COMMUNICATION PROTOCOL:
CODE
wMbus S1
1x
wMbus T1
2x
wMbus C1
3x
wMbus T2
4x
LORA WAN
x1
SIGFOX
x2
NB IoT
00
EXTRA COMMUNICATION INTERFACE:
CODE
NONE
0
Mbus**
1
Wired pulse output **
2
Mbus + Wired pulse output **
3
** - only for meters with connection type G2 and G2 ½
COMMUNICATION INTERFACE TYPE:
CODE
RF 868 MHz
0
RF 433 MHz
1
RF 915 MHz
2
RF 920,5 MHz
3
NB - IoT
4
Meter
QALCOSONIC W1 QW1
Type

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_
_
_
Connection type
METER DESIGN:
CODE
G¾, G1
In accordance with the Annex A
0
G¾, G1
In accordance with the Annex B
1
Complect set
CODE
The water filter is not included
0
The water filter is included
1
2TECHNICAL DATA
Ratio of the permanent flow rate to the lower limit of the flow-rate (selectable by the user):
Q3/Q1 = 80, Q3/Q1 = 160, Q3/Q1 = 250, Q3/Q1 = 315, Q3/Q1 = 400, Q3/Q1 = 800, Q3/Q1 = 1000
The technical data of the meter are provided in Table 1.1.
1.1. Table
PERMANENT
FLOW RATE Q
, M
3
/H
3
RATIO R
Q3/Q1
OVERLOAD
FLOW RATEQ
, M
3
/H
4
MINIMUM
FLOW RATEQ
, M
3
/H
1
TRANSITIONAL
FLOW RATE
Q , M
3
/H
2
THRESHOLD
VALUE,
M
3
/H
CONNECTION TO
THE PIPELINE
(THREAD –G)
OVERALL
LENGTH L,
MM
PRESSURE
LOSS CLASS
Δ P (BAR X
100)
1,6
80
2,00
0,020
0,032
0,001
G ¾
80**, 105, 110,
165, 170
Δ p 16
1,6
160
2,00
0,010
0,016
0,001
G ¾
80**, 105, 110,
165, 170
Δ p 16
1,6
250
2,00
0,0064
0,010
0,001
G ¾
80**, 105, 110,
165, 170
Δ p 16
1,6
315
2,00
0,005
0,008
0,001
G ¾
80**, 105, 110,
165, 170
Δ p 16
1,6
400
2,00
0,004
0,0064
0,001
G ¾
80**, 105, 110,
165, 170
Δ p 16
2,5
80
3,125
0,031
0,050
0,001
G ¾
80**, 105, 110,
165, 170
Δ p 25
2,5
160
3,125
0,0156
0,025
0,001
G ¾
80**, 105, 110,
165, 170
Δ p 25
2,5
250
3,125
0,010
0,016
0,001
G ¾
80**, 105, 110,
165, 170
Δ p 25
2,5
400
3,125
0,0062
0,010
0,001
G ¾
80**, 105, 110,
165, 170
Δ p 25
2,5
800
3,125
0,0031
0,005
0,001
G ¾
80**, 105, 110,
165, 170
Δ p 25
2,5
80
3,125
0,031
0,05
0,002
G1
105, 110, 130,
165, 190
Δ p 16
2,5
160
3,125
0,0156
0,025
0,002
G1
105, 110, 130,
165, 190
Δ p 16
2,5
250
3,125
0,010
0,016
0,002
G1
105, 110, 130,
165, 190
Δ p 16
2,5
400
3,125
0,0062
0,010
0,002
G1
105, 110, 130,
165, 190
Δ p 16
4,0
80
5,00
0,050
0,080
0,002
G1
105, 110, 130,
165, 190
Δ p 25
4,0
160
5,00
0,025
0,040
0,002
G1
105, 110, 130,
165, 190
Δ p 25
4,0
250
5,00
0,016
0,026
0,002
G1
105, 110, 130,
165, 190
Δ p 25
4,0
400
5,00
0,010
0,016
0,002
G1
105, 110, 130,
165, 190
Δ p 25
4,0
800
5,00
0,005
0,008
0,002
G1
105, 110, 130,
165, 190
Δ p 25
6,3
80
7,785
0,079
0,126
0,003
G1 ¼
260
Δ p 25
6,3
160
7,785
0,040
0,063
0,003
G1 ¼
260
Δ p 25
6,3
250
7,785
0,0252
0,040
0,003
G1 ¼
260
Δ p 25
6,3
400
7,785
0,016
0,0252
0,003
G1 ¼
260
Δ p 25
6,3
800*
7,785
0,008
0,013
0,003
G1 ¼
260
Δ p 25
10
80
12,50
0,125
0,200
0,003
G1 ¼
260
Δ p 63
10
160
12,50
0,0625
0,100
0,003
G1 ¼
260
Δ p 63
10
250
12,50
0,040
0,064
0,003
G1 ¼
260
Δ p 63
TEMPERATURE CLASS:
CODE
Temperature class T 30
1
Temperature class T 30/90
2
Temperature class T 90
3
Temperature class T 50
4

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10
400
12,50
0,025
0,040
0,003
G1 ¼
260
Δ p 63
10
800*
12,50
0,0125
0,020
0,003
G1 ¼
260
Δ p 63
10
1000*
12,50
0,010
0,016
0,003
G1 ¼
260
Δ p 63
6,3
80
7,785
0,079
0,126
0,005
G1 ¼
260
Δ p 16
6,3
160
7,785
0,040
0,063
0,005
G1 ¼
260
Δ p 16
6,3
250
7,785
0,0252
0,040
0,005
G1 ¼
260
Δ p 16
6,3
400
7,785
0,016
0,0252
0,005
G1 ¼
260
Δ p 16
10
80
12,50
0,125
0,200
0,005
G1 ¼
260
Δ p 25
10
160
12,50
0,0625
0,100
0,005
G1 ¼
260
Δ p 25
10
400
12,50
0,025
0,040
0,005
G1 ¼
260
Δ p 25
10
800*
12,50
0,0125
0,020
0,005
G1 ¼
260
Δ p 25
10
80
12,50
0,125
0,200
0,010
G2
300
Δ p 16
10
160
12,50
0,0625
0,100
0,010
G2
300
Δ p 16
10
250
12,50
0,040
0,064
0,010
G2
300
Δ p 16
16
80
20,00
0,200
0,320
0,010
G2
300
Δ p 16
16
160
20,00
0,100
0,160
0,010
G2
300
Δ p 16
16
250
20,00
0,064
0,102
0,010
G2
300
Δ p 16
16
400
20,00
0,040
0,064
0,010
G2
300
Δ p 16
16
800*
20,00
0,020
0,032
0,010
G2
300
Δp 16
25
80
31,25
0,3125
0,500
0,010
G2
300
Δ p 16
25
160
31,25
0,156
0,250
0,010
G2
300
Δ p 16
25
250
31,25
0,100
0,160
0,010
G2
300
Δ p 16
25
400
31,25
0,0625
0,100
0,010
G2
300
Δ p 16
25
800*
31,25
0,0312
0,050
0,010
G2
300
Δ p 16
16
80
20,00
0,200
0,320
0,016
DN50
200
Δp 16
16
160
20,00
0,100
0,160
0,016
DN50
200
Δ p 16
16
250
20,0
0,064
0,102
0,016
DN50
200
Δ p 16
16
400*
20,00
0,040
0,064
0,016
DN50
200
Δ p 16
25
80
31,25
0,3125
0,500
0,016
DN50
200
Δ p 16
25
160
31,25
0,156
0,250
0,016
DN50
200
Δ p 16
25
250
31,25
0,100
0,160
0,016
DN50
200
Δ p 16
25
400
31,25
0,0625
0,100
0,016
DN50
200
Δ p 16
25
800*
31,25
0,0312
0,050
0,016
DN50
200
Δ p 16
40
80
50,00
0,500
0,800
0,016
DN50
200
Δ p 16
40
160
50,00
0,250
0,400
0,016
DN50
200
Δ p 16
40
250
50,00
0,160
0,256
0,016
DN50
200
Δ p 16
40
400
50,00
0,100
0,160
0,016
DN50
200
Δ p 16
40
800*
50,00
0,050
0,080
0,016
DN50
200
Δ p 16
NOTE: * this flow ratio is only valid for meters with temperature class T30.
** meters with a length l = 80 mm are produced only in the initial design version.
METER TEMPERATURE CLASS
WATER TEMPERATURE RANGE:
Meter temperature class T30
(0,1°C ... 30°C)
Meter temperature class T50
(0,1°C ... 50°C)
Meter temperature class T30/90
(30°C ... 90°C)
Meter temperature class T90
(0,1°C ... 90°C)

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• Maximum admissible working pressure (pressure class) 16 bar (MAP16)
• Flow profile sensitivity class U0 D0
• Unit of volume measurement:m3 (on LCD display)
• Resolution of a displaying device 0,001 m3
• Displaying range 999999,999 m3
The maximum permissible error (MPE) on volumes delivered at flow rate between the transitional flow rate Q2 (included) and theoverload flow
rate Q4 (included) is:
• When water temperature ≤+30 °C ±2 %
• When water temperature >+30 °C ±3 %
The maximum permissible error (MPE) on volumes delivered at flow rate between the minimum flow rate Q1(included) and the
_
transitional flow rate Q2 (excluded) for water having any temperature is: 5%
If the flow rate exceeds the maximum value Q4, error (status) code „Overflow“ is present and calculations are:
• When the flow rate Q ≤1.2 x Q4, the flow rate measurement and calculations are continued.
• When the flow rate Q > 1.2 x Q4, calculations are performed using 1.2 x Q4 flow rate value.
2.1 DISPLAY (LCD)
THE DEVICE IS EQUIPPED WITH 2-LINES LCD (LIQUID CRYSTAL DISPLAY):
Upper line with 9-digits for displaying measured volume of water:
• Readings in normal mode: m³ (three digits after decimal point).
• Readings in test (verification) mode: m³ (six digits after decimal point).
Lower line with 5-digits for displaying current flow rate in m³/h and special symbols for displaying operation modes.
In the case of battery discharge, all integral readings and archive data shall be saved for at least 16 years and can be accessed at the
meter manufacture’s base by connecting a power battery in the operating condition.
2.2 DATA RECORDING AND STORAGE
In its memory, meter accumulates an archive of hourly, daily, and monthly - measured parameters. Archive values, specified in Paragraph
6.3, can be showed on the display.
HOURLY, DAILY AND MONTHLY OF THE FOLLOWING PARAMETERS ARE STORED IN THE METER:
1
Integral volume of water
2
Integral volume of water in the forward direction
3
Informational flow in the reverse direction
4
Maximum flow rate value and date
5
Error (Status) code
6
Total operating time
7
Operating time without error
8
Average temperature
DATA LOGGER CAPACITY:
• Up to 1480 hours for hourly records.
• Up to 1130 days for daily records.
• Up to 36 last months for monthly records.
Archive data storage time not less than 36 months. Storage time of measured integrated parameters in not less than 16 years, even if device is
disconnected from power supply.
2.3 ALARMS
Qalcosonic W1 meter has integrated system that informs about certain alarms, which are indicated as an error code on LCD and transmitted as
a status byte within data telegrams. Some of them are critical and could be sent immediately over LoRa.

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LIST OF ALARMS:
• Leakage (occurs when constant flow rate within 24 hours is more than 0.25/0.5/1% of Q3.
Disappears after 1 hour, if constant flow rate within that hour is less than configured value).
• Burst (occurs when constant flow rate within 60 minutes is more than 5/10/20% of Q3.
Disappears after 32 seconds, if constant flow rate within that period of time is less than configured value).
• Freeze (occurs when water temperature is lower than 2/3/4/5°C for 5 minutes.
Disappears after 5 minutes, if water temperature is higher than configured value).
• Reverse flow (occurs when meter detects negative flow that isequal to 2 x starting flow.
Disappears immediately if reverse flow is stopped).
• Empty pipe (occurs approx. 30 seconds after the absence of water.
Disappears immediately (up to 30 seconds) if meter detects water without air or air bubbles.
• Tamper (occurs when meter is opened or damaged).
• Hardware or software failure.
• Low battery (occurs when approx. battery lifetime is less than 12 months).
• Communication temporarily blocked (only on meter LCD).
• Overflow (occurs when flow rate is higher than Q4).
• No consumption (occurs when there was no water usage for the last 3/7/30 days).
NOMINAL FLOW RATE Q3, M³/H
Leakage threshold, m³/h
Burst threshold, m³/h
0,25 %
0,5 %
1 %
5 %
10 %
20 %
1,6
0,004
0,008
0,016
0,08
0,16
0,32
2,5
0,00625
0,0125
0,025
0,125
0,25
0,50
4,0
0,010
0,020
0,040
0,20
0,40
0,80
6,3
0,01575
0,0315
0,063
0,315
0,63
1,26
10
0,025
0,050
0,100
0,50
1,00
2,00
16
0,040
0,080
0,160
0,80
1,60
3,20
25
0,0625
0,125
0,250
1,25
2,50
5,00
40
0,100
0,200
0,400
2,00
4,00
8,00
Communication type
Display
wMBus
LoRa WAN
NB IoT
SIGFOX*
Type of alarm
Error code
Status byte
Status byte
Critical alarm
message
Status byte
Critical alarm
message
Status byte
Critical alarm
message
Default
Optional
Default
Optional
Default
Optional
Default
Optional
Default
Optional
Default
Optional
Default
Optional
Default
Optional
Leakage
X
X
X
X
X
X
X
X
Burst
X
X
X
X
X
X
X
X
Freeze
X
X
X
X
X
X
X
X
Negative flow
X
X
X
X
X
X
X
X
Empty pipe
X
X
X
X
X
X
X
Tamper
X
X
X
X
X
X
X
Calculator’s hardware
error
X
X
X
X
X
X
Hardware error
X
X
X
X
X
X
Software error
X
X
X
X
X
X
Low battery (< 12
months)
X
X
X
X
X
X
Communication
temporarily blocked
X
Overflow
X
No consumption
X
X
X
No signal
X
* Only for Packet ID –02 –Daily (B type); Packet ID –03 –Alarm; Packet ID –04 –Monthly
2.4 EXTERNAL COMMUNICATION MODULES AND INTERFACES
Optical interface is integrated in Qalcosonic
W1 meter by default. It is intended for data
reading, changing parameters of meter and for
outputting optical pulses
in the test (verification) mode. It is activated by
sending 1 second pulse sequence (5 minutes
after the end of communication is
automatically deactivated).
There is also NFC (Near Field Communi cation)
interface integrated by default. It is intended
for data reading only.

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AVAILABLE COMMUNICATION MODULES FOR DATA TRANSMISSION (ONLY ONE OPTION MIGHT BE SELECTED WHEN PLACING THE ORDER):
• RF 868 MHz
• RF 433 MHz
• RF 915 MHz
• RF 920,5 MHz
• NB IoT (frequency bands B1, B3, B5, B8, B20, B28)
• RC1
• RC7
DATA IN QALCOSONIC W1 METER CAN BE TRANSMITTED USING THE FOLLOWING PROTOCOLS:
• wMBus T1
• wMbus T2
• wMBus S1
• wMBus C1
• SIGFOX
• LORA WAN
• CoAP
All communication interfaces are intended
for data reading and meter parametrization.
The meter is produced for being powered
only from the internal battery. In order to
save the battery, communication credit
system is implemented into the meter. Time
of communication through additional
interfaces is automatically limited to save the
battery (up to 20 minutes per month).
Unused communication limit is summed up. If
the limit is expired, the interface is blocked
and the new time limit of communications
will start only after the change of the hour
(16 seconds for each next hour).
2.5 METER PULSE OUTPUT
2.5.1 Pulse output in test mode via optical interface
Pulse values through optical interface are available only in Test Mode and it depends on the nominal flow rate Q3. It might be used during
verification for automatic metrology reading. Available values are specified in the table below:
Nominal flow rate Q3, m³/h
1,6
2,5
4,0
6,3
10
16
25
40
Pulse value, l/pulse
0,001
0,002
0,004
0,005
0,010
0,015
0,020
0,025
Connection thread
G ¾
G ¾; G1
G1
G1 ¼ ; G1 ½
G1 ¼ ; G1 ½ ; G2
G2; DN50
G2; DN50
G2; DN50
2.5.2 Pulse output via wired interface
The pulse output wired interface can be additionally ordered for meters with G2 and DN50 connection in the piping.
•Class: OB - in operating mode.
•Type: open collector, permissible current up to 20 mA, voltage - up to 24V.
•Pulse duration: 125ms - operating mode.
The pulse value in the operating mode can be configured depending on the nominal flow Q3, as shown in table below:
Nominal flow rate Q3, m³/h
10
16
25
40
Pulse value, l/pulse
1
1,5
2
2,5
2.6 POWER SUPPLY
The meter is powered by one or more internal non-replaceable batteries with a service life of at least 16 years. Accurate battery lifetime
depends also on data transmission frequency. You can choose one of several power battery options when ordering:
For G ¾ or G1 connection type meters (initial design version):
- Two internal “AA" connection type 3.6 V lithium (Li-SOCl2) batteries
- Two internal "AA" size + one "A23" size 3.6 V nominal voltage lithium (Li-SOCl2) batteries (when ordering meters with a flow sensor
connection type of G ¾ or G1);
For G ¾ or G1 connection type meters (new design version):
- One internal “C” size + one “A23” size 3.6 V nominal voltage lithium (Li-SOCl2) batteries
- Two internal "AA" size + one "A23" size 3.6 V nominal voltage lithium (Li-SOCl2) batteries
For G1 ¼ or G1 ½ connection type meters:
- Two internal "AA" size + one "A23" size 3.6 V nominal voltage lithium (Li-SOCl2) batteries