Ralston Instruments LC20-GR2M-GJ2M-W1, LC20-GP2M-GH2M-W1, LC20-GP2M-GF2M-00, LC20-GT2M-TX125-00, LC20-GJTC15-00-00 User manual

LC20 Quick-start Guide

For all models of Ralston LC20 Digital Pressure or Temperature
Gauges

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Table of Contents

Included Items .....................................................................3

Important Safety Notices ....................................................5

LC20 Features Overview ................................................... 12

Activate Your LC20 ............................................................ 20

Updating LC20 and FieldLab Desktop ............................. 25

Operation Instructions ...................................................... 28

Button Functions ............................................................... 44

Menu Functions ................................................................. 52

Battery Installation ............................................................62

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Calibration ..........................................................................64

Specications ....................................................................65

Radio Information (For models with W1 radio option installed) ..........70

Standards and Agency Approvals ...................................74

Support ...............................................................................80

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Included Items

.

EN

Items included in the package. If any items are missing, please contact your
Ralston Instruments distributor.

• LC20 Pressure or Temperature gauge

• 2 x AA batteries

• 2 meter USB Micro-B cord

• For gauges with W1 option - DGAU-0050 USB Dongle and D-001576 antenna

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Important Safety Notices

EN i WARNING: Do not operate in hazardous

locations.

i WARNING: Do not use LC20 until you have read and fully understand the

instructions and hazards of the product.

i WARNING: Contents may be under high pressure or temperature.

i WARNING: Any modications to this product with custom parts can result

in hazardous operation of the product.

i WARNING: Use eye protection while using this device.

i WARNING: Do not overpressure LC20 or damage may result.

i WARNING: This product can expose you to chemicals including Lead,

which is known to the State of California to cause cancer, and is known to
the State of California to cause birth defects or other reproductive harm. For

more information go to www.P65Warnings.ca.gov.

i CAUTION: Installation of LC20 must be in accordance with Ralston

Instruments installation instructions.

i CAUTION: Installation of LC20 must be in accordance with applicable

local, national and international standards and electrical codes.

i CAUTION: Batteries are not rechargeable and will not be recharged

via USB.

i CAUTION: Use only approved AC/DC power adapter model D-000410.

i CAUTION: Protection impairment may occur if used in a manner not

specied by Ralston Instruments.

i CAUTION: Only those personnel trained in the use of this device shall

operate it.

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LC20 Features Overview

Front

1

2

6

5

4

3

12

13

Back

11

9

10

7

14

8

12

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EN

10.

11.

12.

13.

14.

1.

Power

2.

LCD display

3.

Left arrow / High/Low/Reset

4.

Up Arrow / Menu

5.

Accept / Zero

6.

Right Arrow / Backlight

7.

Micro USB port

8.

Pressure sensor option

9.

Battery access door
Pressure equalizing vent
Warning label
Antenna option (W1)
External temperature probe (TX)
Temperature sensor option (TA)

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LCD display

1

6

9201.8

7

2

EN

1. Battery indicator

2.

Graphical pressure/temperature meter

3.

Connection symbol (USB or wireless)

4.

Check mark to indicate success

5.

High and low arrows

6.

Main pressure/temperature display

3

4

5

14

7.

Secondary display

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EN

Power Management

Con󰘰gure display and power management to maximize battery life in the 󰘰eld using
FieldLab Desktop software.

Graphic Pressure or Temperature Meter

See pressure or temperature graphically

High / Low Readings

See continuous Maximum and Minimum pressure or temperature readings over a span
of time

Easily Change Engineering Units

Change to any of the 18 standard pressure engineering units or
4 standard temperature units on the 󰘱y. Manage frequently used units or remove
unused units with FieldLab Desktop.

Custom Engineering Units

Create custom engineering units using FieldLab Desktop and add them to any LC20
gauge.

View Live Readings on Your PC

View real-time pressure and/or temperature readings on your PC from your LC20
gauge using FieldLab Desktop via USB or wireless.

Log Data on Your PC

Log pressure and/or temperature data on your PC from your LC20 gauge using
FieldLab Desktop via USB or wireless.

15

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Activate Your LC20

EN

Before using your LC20 for the 󰘰rst time, you should activate it and link
it to your PC. Note that this is optional and only required if you want to
change any settings on the LC20 or calibrate it.

1 Download & Install FieldLab Desktop

Visit to download and install FieldLab
Desktop on your Windows PC*

2 Open & Follow onscreen instructions in FieldLab

Desktop software

Follow the onscreen directions closely before connecting your LC20.
Do not connect your LC20 until instructed to do so.

3 You’re ready to begin!

Find detailed support articles for changing settings, viewing live

readings and logging data at

* Windows version 7 or greater only. Administrative rights required to install FieldLab Desktop

software.

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Updating LC20 and FieldLab Desktop

EN

Updating FieldLab Desktop

Open FieldLab Desktop on your computer, and select FieldLab > Check
for Updates.

Updating your LC20

1. Open FieldLab Desktop on the computer you use to manage your LC20.

2. Connect the LC20 using the USB cable.

3. Select the LC20 from the FieldLab’s menu. Any available updates will

be displayed.

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Operation Instructions

EN

Conditions of Use

• Environment: Indoor use or temporary outdoor use. For long term or
permanent outdoor use, a suitable enclosure may be required.

• IP67 Rating: LC gauges with external thermal probes must have the
thermal probe cable installed in M12 connector on gauge to maintain
IP67 rating.

• LC gauge requires (2) AA Batteries, power from a PC via USB or power
from AC power adapter D-000410 via USB to operate.

• RF Exposure Statement: The LC20 device when used with approved
antenna complies with the FCC and IC portable RF Exposure limits set
forth for an uncontrolled environment and is safe for intended operation
as described in the user manual. To comply with RF exposure limits
established in the ANSI C95.1 standard, the distance between the
antenna and the user should not be less than 25 cm (10 inches) for USA
and 34 cm for Canada. Further RF exposure reduction can be achieved
if the product can be kept as far as possible from the user’s body.

Installation Instructions

• Ensure that gauge is oriented in such a way that the “Power” button is

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always easily accessible.

• If pressure sensor option is installed, then seal pressure connection
with thread sealant prior to assembling it in any pressure system.

• If temperature sensor option is installed, then connect thermal probe
using a rated thermal well or other approved device.

• Place gauge in area that is protected from damage from weather,
excessive temperature, impact or humidity.

Connecting to Accessories or Other Equipment

Connect to a PC via USB cable

• Use only approved USB cable P/N D-000040

Connect to AC Mains

• Use only approved power adapter P/N D-000410 and approved USB
cable P/N D-000040

Connect to External Thermal Probe

• Connect thermal probe cable to gauge using male end of thermal
probe cable.

• Connect thermal probe to cable using female end of thermal probe
cable.

• If cable is being installed permanently, then secure cable following all
applicable electrical standards.

• Use only approved thermal probe P/N D-000403 that has been
calibrated with this device.

• Use only approved thermal probe cable P/N D-0000404.

• External thermal probe is calibrated with the base unit. If thermal probe

is changed, then use FieldLab Desktop to update the serial number
and calibration coe󰘲cients of the new thermal probe.

Connection of Antenna (W1 option)

• Thread approved antenna into gauge RF connection

• Align antenna vertically for best signal reception

• Do not obstruct line of sight between antenna and receiver with metal

or dense materials or a reduction or loss of signal may result

• Use only approved antenna P/N D-001576 with “W1” option

Wireless Radio (W1)

• Connect to PC using included dongle P/N DGAU-0050

• Select the same channel on the gauge and the Desktop software

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Instructions for Cleaning or Decontamination

• Clean enclosure with mild water-based cleaner. Do not use
aggressive solvent.

• Flush pressure sensor or thermal probe with alcohol based cleaner
(or other cleaner compatible with 316 Stainless steel) if toxic or other
hazardous substance is used.

30

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Button Functions

EN

Power • Press and hold to turn on.

• When LC20 is on, press and hold to turn o󰘯.

Note: LC20 will turn o󰘯 automatically based on setting in
FieldLab Desktop. Default time is 10 minutes, but can be
changed using FieldLab Desktop software.

Hi/Low/
Reset

Menu • If 2 sensors, quick press to change sensors.

Zero
Pressure

Backlight • Press button to illuminate backlight.

• Press button once to display highest pressure or
temperature reached.

• Press button again to display lowest pressure or
temperature reached.

• Press and hold button again to clear high and low values.

• Hi/Low/Reset applies to the Active Sensor. If there

are 2 sensors, then change sensors to use Hi/Low/
Reset for the other sensor.

• Long press initiates MENU and follow prompts.

• With no pressure applied, press and hold button to

zero reading.

Note: If pressure is greater than 10% of gauge pressure
range, then a message to vent the pressure will appear.

Note: Light will turn o󰘯 after a set time. Both time and
brightness can be adjusted in FieldLab Desktop software.

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Menu Functions

units RAdio firmware Last cal next cal

Menu

Menu

Push and hold the Up Arrow/Menu button until

1

menu

“MENU” appears.

2

52

units RAdio firmware Last cal next cal

Push the Right and Left Arrow buttons to scroll through the
menu items.

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Change Units

menu units RAdio firmware Last cal next cal

units

psi

units

kpa

units

BAR

units

Menu

Change Units

Touch and
hold the Up
Arrow/Menu
button until
“MENU”
appears.

Touch the Right and Left Arrow buttons to scroll through the
menu items.

psi

units

kpa

units

BAR

units

Touch the Right and Left Arrow buttons to scroll through the
menu items.

kpa

units

BAR

units

BAR

units

1

2

menu

units

Push and hold the Up Arrow/Menu button until
“MENU” appears.

Scroll to UNITS

units

units

psi

kpa

3

4

Push the Accept / Zero button to enter the UNITS
submenu.

Scroll through the engineering units.

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Accept to change to the displayed engineering unit.

menu units RAdio firmware Last cal next cal

menu

units

RADIO

psi

units

RF ON WAITING

kpa

units

BAR

units

Menu

Change Units

Turn on Wireless Radio

Touch and
hold the Up
Arrow/Menu
button until
“MENU”
appears.

Touch and
hold the Up
Arrow/Menu
button until
“MENU”
appears.

Scroll to
UNITS

Touch the Right and Left Arrow buttons to scroll through the
menu items.

Touch the
Accept /
Zero button
to enter the
UNITS
submenu.

Scroll
through the
engineering
units.

Accept to
change to
the
displayed
engineering
unit.

units

psi

units

RF ON WAITING

kpa

units

BAR

units

Scroll to
UNITS

Touch the Right and Left Arrow buttons to scroll through the
menu items.

Touch the
Accept /
Zero button
to enter the
UNITS
submenu.

Scroll
through the
engineering
units.

Accept to
change to
the
displayed
engineering
unit.

5

units

BAR

Turn on Wireless Radio (W1 option)

Push and hold the Up Arrow/Menu button until

1

menu

“MENU” appears.

Scroll to RADIO

2

54

RADIO

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psi

units

WAITING

kpa

units

BAR

units

Touch the
Accept /
Zero button
to enter the
UNITS
submenu.

Scroll
through the
engineering
units.

Accept to
change to
the
displayed
engineering
unit.

kpa

units

BAR

units

Scroll
through the
engineering
units.

Accept to
change to
the
displayed
engineering
unit.

BAR

units

Accept to
change to
the
displayed
engineering
unit.

3

psi

units

WAITING

kpa

units

BAR

units

Touch the
Accept /
Zero button
to enter the
UNITS
submenu.

Scroll
through the
engineering
units.

Accept to
change to
the
displayed
engineering
unit.

4

5

RF ON

RF ON

WAITING

Push the Accept / Zero button to enter the Radio
submenu.

Push the Accept / Zero button to turn on the
wireless radio.

Gauge is now ready to connect with other devices
wirelessly.

Gauge is connected when link icon is solid.

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RF ON CHANNEL CHAN 26

CHANNEL CHAN 26

Change Wireless Radio Channel (W1 option)

RADIO RF ON CHANNEL CHAN 26

Change Wireless Radio Channel

Push and hold the Up Arrow/Menu button until

1

2

menu

RADIO

“MENU” appears.

Scroll to RADIO

3

56

RF ON

Push the Accept / Zero button to enter the Radio
submenu.

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4

CHAN 26

menu RADIO RF ON CHANNEL CHAN 26

CHAN 12 CHAN 14

psi

0.00

Change Wireless Radio Channel

Touch and
hold the Up
Arrow/Menu
button until
“MENU”
appears.

Scroll to
RADIO.

Touch the
Accept /
Zero button
to enter the
Radio
submenu.

Scroll to
CHANNEL.

Accept to
enter the
Channel
submenu.

CHAN 14

psi

0.00

Scroll to
RADIO.

Touch the
Accept /
Zero button
to enter the
Radio
submenu.

Scroll to
CHANNEL.

Accept to
enter the
Channel
submenu.

psi

0.00

Touch the
Accept /
Zero button
to enter the
Radio
submenu.

Scroll to
CHANNEL.

Accept to
enter the
Channel
submenu.

5

6

Scroll to CHANNEL.

CHANNEL

Accept to enter the Channel submenu.

CHAN 26

Checkmark indicates current channel.

CHAN 26

7

8

CHAN 12

CHAN 14

Scroll to the channel you want to use.

Accept to set new channel.

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Adjust settings for Radio Auto-on/Auto-off

menu LAST CAL

2020

10-02

RADIO RF ON AUTO ON AUTO ON

View Last and Next Calibration Dates

Adjust settings for Radio Auto-On/Auto-Off

Touch and
hold the Up
Arrow/Menu
button until
“MENU”
appears.

Scroll to
LAST CAL
or NEXT
CAL

Accept to
view
calibration
date.

Auto-On = Radio always on when gauge is powered on.
Auto-Off = Radio is off by default. Ideal for minimizing battery drain.

(W1 option)

Auto-on = Radio always on when gauge is powered on.

Auto-o󰘯 = Radio is o󰘯 by default. Ideal for minimizing battery drain.

Push and hold the Up Arrow/Menu button until

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58

menu

www.GlobalTestSupply.com

“MENU” appears.

2

2020

10-02

RF ON AUTO ON AUTO ON

Scroll to
LAST CAL
or NEXT
CAL

Accept to
view
calibration
date.

2020

10-02

AUTO ON AUTO ON

Accept to
view
calibration
date.

AUTO ON

3

4

RADIO

RF ON

AUTO ON

Scroll to RADIO

Push the Accept / Zero button to enter the Radio
submenu.

Scroll to RF AUTO ON.

5

AUTO ON

Push the Accept/Zero button to set the radio to
AUTO ON/OFF

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psi

0.00

1.008

Scroll to
RADIO.

Touch the
Accept /
Zero button
to enter the
Radio
submenu.

Scroll to
CHANNEL.

Accept to
enter the
Channel
submenu.

Scroll to the
channel you
want to use.

Accept to
set new
channel.

Touch Menu
twice to
return to
main
screen.

psi

0.00

Touch the
Accept /
Zero button
to enter the
Radio
submenu.

Scroll to
CHANNEL.

Accept to
enter the
Channel
submenu.

Accept to
set new
channel.

Touch Menu
twice to
return to
main
screen.

View Firmware Version

FIRMWARE

menu RADIO RF ON CHANNEL CHAN 26

CHAN 26 CHAN 12 CHAN 14

psi

0.00

1.008

Change Wireless Radio Channel

View Firmware Version

Touch and
hold the Up
Arrow/Menu
button until
“MENU”
appears.

Scroll to
RADIO.

Touch the
Accept /
Zero button
to enter the
Radio
submenu.

Scroll to
CHANNEL.

Accept to
enter the
Channel
submenu.

Checkmark
indicates
current
channel.

Scroll to the
channel you
want to use.

Accept to
set new
channel.

Touch Menu
twice to
return to
main
screen.

Push and hold the Up Arrow/Menu button until

1

2

menu

FIRMWARE

“MENU” appears.

Scroll to FIRMWARE.

3

1.008

60

Accept to view 󰘰rmware version.

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View Last and Next Calibration Dates

LAST CAL

2020

10-02

View Last and Next Calibration Dates

2020

10-02

Push and hold the Up Arrow/Menu button until

1

2

menu

LAST CAL

“MENU” appears.

Scroll to LAST CAL or NEXT CAL

10-02

3

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Accept to view calibration date.

61

Battery Installation

1 2

4 x Phillips No. 1

3

EN

Recommended Alkaline AA Batteries (2X) (ANSI 15A, IEC LR6)

4

4 x Phillips No. 1

• Duracell MN1500

• Energizer E91

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• Energizer EN91

• Rayovac Max Plus 815

Calibration

EN

• Download PC software at

• Follow instructions in software on how to calibrate pressure or
temperature

64

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Specications

Antenna D-001576 antenna (included with W1 models) /

Batteries 2 x AA (LR6)

Battery Life 1,500 hours typical

Digital Interface USB Micro-B (on back)

Dimensions (not including temp. probe) 3.5 x 4.1 x 2.2 in (8.9 x 10.4 x 5.6 cm)

Display 5 x 0.5 in (12.7 mm) upper digits

Electrical Rating

8 x 0.2 in (5 mm) lower digits

USB Mode - 5 VDC, 0.25W

Battery Mode - 3 VDC, 0.25W
Power Adapter - 90 ~ 264 VAC Input, 5 VDC @
1 Amp Output

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Environment

Indoor use
Temporary outdoor use

Ingress Protection IP67 (1 meter submersion for 30 minutes)

Materials of Construction

Polycarbonate, Aluminum, 316L Stainless Steel

Media Compatibility Gases and liquids compatible with 316L S.S.

Operating Altitude (max)

Operating Temperature Range

10,000 ft (3050 m)

-4 to 122°F (-10 to 50°C)

(Enclosure)

Power 2 x AA batteries, D-000040 power adapter

(optional)

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Protection Class Pollution Degree 2

Relative Humidity 90% RH 14 to 95°F (-10 to 35°C)

Storage Temperature Range -40 to 167°F (-40 to 75°C)

USB Cable USB Micro, 2 meter

Weight 12 oz (340 g)

Wireless Link DGAU-0050 USB dongle (included with W1

75% RH 95 to 104°F (35 to 40°C)
45% RH 104 to 122°F (40 to 50°C)

, shielded

models)

Pressure Specications
(for all models with pressure connection, if included)

Pressure Accuracy +/-0.1% of full scale

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(ASME Grade 4A / ISO Class 0,1)

67

Pressure Connection

¼" Male NPT

Temperature Specications
(for all models with thermal probe, if included)

External Temperature Probe M12 female, A Code, Silicone seal, IP67

External Thermal Probe
T

emperature Range

Internal Temperature Probe Permanently mounted - dimensions vary with

Temperature Accuracy +/-(0.27 + 0.004*|t|) °F

-22 to 302°F (-30 to 150°C)

model, IP67

+/- (0.15 + 0.002*|t|) °C
(IEC 60751 Class

A

68

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W1 - Wireless Radio Specications (if included)

EN

• Contains FCC ID VW4A091732

• Contains IC Module ID 11019A-091732

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Radio Information (For models with W1 radio option installed)

EN

FCC Declaration of Conformity

This device complies with Part 15 of the FCC Rules. Operation is subject
to the following two conditions:

(1) this device may not cause harmful interference, and

(2) this device must accept any interference received, including

interference that may cause undesired operation.

Industry Canada Declaration of Conformity

This device complies with Industry Canada’s licence-exempt RSS
standards. Operation is subject to the following two conditions:

(1) this device may not cause harmful interference, and

(2) this device must accept any interference received, including

interference that may cause undesired operation of the device.

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Standards and Agency Approvals

EN

This product complies with the following standards. Refer to EC
Declaration of Conformity for speci󰘰c details

• CAN/CSA-C22.2 No 61010-1-12: 3rd Edition

• UL 61010-1: 3rd Edition

• EN/IEC 61010-1:2010

• AS 61010-1, 3rd Edition

• IEC 61326-1:2012 2nd Edition

• Pressure Equipment Directive (PED) 2014/68/EU

• Electromagnetic Compatibility Directive (EMC) 2014/30/EU

Electromagnetic Specications

Conducted RF IEC 61000-4-6, performance criterion B

DC Power Burst IEC 61000-4-4, performance criterion B

DC Power Surge IEC 61000-4-5, performance criterion B

Electro-static Discharge Immunity IEC 61000-4-2:2008, performance criterion B

Radiated Emissions CISPR 11:2009, Group 1, Class B

Radiated, Radio-Frequency

Electromagnetic Immunity

RF Field effects on Measurement
Accuracy

74

IEC 61000-4-3:2006, performance criterion A

Accuracy of Pressure and Temperature is not

specied for RF elds > 3V/m

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