RKI Instruments GP-03 User manual

www.rkiinstruments.com
03 Series:
GP-03 Version
Operator’s Manual
Part Number: 71-0303
Revision: B
Released: 4/14/17

GP-03 Operator’s Manual
WARNING
Read and understand this instruction manual
before operating instrument. Improper use of the
gas monitor could result in bodily harm or death.
Periodic calibration and maintenance of the gas
monitor is essential for proper operation and cor-
rect readings. Please calibrate and maintain this
instrument regularly! Frequency of calibration
depends upon the type of use you have and the
sensor types. Typical calibration frequencies for
most applications are between 1 and 3 months,
but can be required more often or less often
based on your usage.

GP-03 Operator’s Manual Warranty
Warranty
RKI Instruments, Inc. warrants the GP-03 Single Gas Monitor sold by us to
be free from defects in materials, workmanship, and performance for a
period of two (2) years from the date of shipment from RKI Instruments,
Inc. This includes the instrument and the original sensor. Replacement
parts are warranted for one (1) year from the date of their shipment from
RKI Instruments, Inc. Replacement sensors are warranted for two (2) years
from the date of their shipment from RKI Instruments, Inc. Any parts found
defective within their warranty period will be repaired or replaced, at our
option, free of charge. This warranty does not apply to those items, which
by their nature, are subject to deterioration or consumption in normal
service, and which must be cleaned, repaired, or replaced on a routine
basis. Examples of such items are as follows:
Warranty is voided by abuse including mechanical damage, alteration,
rough handling, or repair procedures not in accordance with the instruction
manual. This warranty indicates the full extent of our liability, and we are
not responsible for removal or replacement costs, local repair costs,
transportation costs, or contingent expenses incurred without our prior
approval.
THIS WARRANTY IS EXPRESSLY IN LIEU OF ANY AND ALL OTHER WARRANTIES
AND REPRESENTATIONS, EXPRESSED OR IMPLIED, AND ALL OTHER
OBLIGATIONS OR LIABILITIES ON THE PART OF RKI INSTRUMENTS, INC.
INCLUDING BUT NOT LIMITED TO THE WARRANTY OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL RKI
INSTRUMENTS, INC. BE LIABLE FOR INDIRECT, INCIDENTAL, OR
CONSEQUENTIAL LOSS OR DAMAGE OF ANY KIND CONNECTED WITH THE USE
OF ITS PRODUCTS OR FAILURE OF ITS PRODUCTS TO FUNCTION OR OPERATE
PROPERLY.
This warranty covers instruments and parts sold to users only by
authorized distributors, dealers, and representatives as appointed by RKI
Instruments, Inc.
We do not assume indemnification for any accident or damage caused by
the operation of this gas monitor and our warranty is limited to replacement
of parts or our complete goods.
Absorbent cartridges
Filter elements, disks, or sheets
Pump diaphragms and valves

Table of Contents GP-03 Operator’s Manual
Table of Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Case . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Sensor Gasket, Sensor Membrane, and H2S Filter Disk . . . . . . . . . . . . . . . . . . . 5
Combustible Gas Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
LCD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Control Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Alarm LED. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Buzzer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Vibrator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
IrDA Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Printed Circuit Boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Protective Rubber Boot. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Alligator & Belt Clips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Start Up. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Start-up Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Performing a Fresh Air Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Turning Off the GP-03. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
Measuring Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Combustible Gas Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Adjusting the Buzzer Volume . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Display Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Alarms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Data Logging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
03 Series User Setup Program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Calibration Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Calibration Frequency. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Using Calibration Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Setting the Date and Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Performing a Fresh Air Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Performing an Automatic Span Adjustment in A--CAL . . . . . . . . . . . . . . . . . . . . 31

GP-03 Operator’s Manual Table of Contents
Performing an Easy Span Adjustment in E--CAL . . . . . . . . . . . . . . . . . . . . . . . . 36
Performing a Manual Span Adjustment in M--CAL . . . . . . . . . . . . . . . . . . . . . . . 41
Performing a Bump Test in BUMP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Viewing the Instrument’s Firmware Version . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Setup Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Using Setup Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Setting the Date and Time in DATE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Performing a Fresh Air Adjustment in AIR. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Performing an Automatic Span Adjustment in A--CAL . . . . . . . . . . . . . . . . . . . . 53
Performing an Easy Span Adjustment in E--CAL . . . . . . . . . . . . . . . . . . . . . . . . 53
Performing a Manual Span Adjustment in M--CAL . . . . . . . . . . . . . . . . . . . . . . . 54
Setting the Alarm Points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Adjusting the Bump Test Limit Check Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Setting the Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Replacing or Recharging the Batteries . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Replacing the Sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Replacing the Sensor Membrane and H2S Filter Disk . . . . . . . . . . . . . . . . . . . . 64
Parts List. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
WARNING: Understand this manual before operating the GP-03.
Substitution of components may impair intrinsic safety.
To prevent ignition of a hazardous atmosphere, batteries
must only be changed in an area known to be
nonhazardous. This unit has not been tested in an
oxygen enriched atmosphere (above 21%).

1 • Introduction GP-03 Operator’s Manual
Introduction
Using an advanced microprocessor controlled detection system, the GP-03
Single Channel LEL Gas Monitor detects the presence of combustible gas
(e.g., methane, CH4) as a percentage of LEL (lower explosive limit). The
GP-03’s compact size and easy-to-use design make it ideally suited for a
wide range of applications, including sewage treatment plants, tunnels,
hazardous waste sites, petrochemical facilities, oil fields, mines, and
chemical plants. The GP-03 is even small enough to be placed
conveniently in a pocket. The GP-03 offers the following features:
• Compact design
• Fast, accurate response with backlit digital liquid crystal display (LCD)
• Visual, audible, and vibration alarms
• Microprocessor control for reliability, ease of use, and advanced
capabilities
• Resistance to RF (radio frequency) interference
• Datalogging including interval trend data and alarm trend data
• Peak indication
• Over range alarm
• Gas, battery, sensor failure, and system failure alarms
• Rotatable alligator clip for “hands free” gas monitoring, belt clip optional
• CSA certification for intrinsic safety in Class I, Division I, Groups A, B,
C, and D hazardous atmospheres
WARNING: The GP-03 detects combustible gas, which can be
dangerous or life threatening. When using the GP-03, you
must follow the instructions and warnings in this manual
to assure proper and safe operation of the unit and to
minimize the risk of personal injury. Be sure to maintain
and calibrate the GP-03 as described in this manual.

GP-03 Operator’s Manual Specifications • 2
Specifications
Table 1: GP-03 Specifications
Target Gas Combustible Gas, Methane (CH4) Calibration Standard*
Detection Range 0 to 100% LEL
Display Increment 1% LEL
Detection Principle Catalytic Combustion Method
Alarm Points • Low Alarm: 10% LEL
• High Alarm: 50% LEL
• Over Range: 100% LEL
Sampling Method Diffusion
Response Time T90 in 30 seconds
Accuracy ± 5% of reading or ± 2% LEL (whichever is greater)
Indication Digital LCD
Safety/Regulatory
C US
186718
CSA classified, “C/US”, as Intrinsically Safe. Exia.
Class I, Groups A, B, C, & D. Temperature Code T3C.
Power • Two AAA size alkaline batteries standard, Duracell MN2400
or PC2400
• Two AAA size Ni-MH batteries optional, Panasonic Eneloop
BK-4MCC
Continuous
Operating Hours
• Alkaline batteries: 35 hours at 25 °C, no alarms or
backlighting
• Ni-MH batteries: 30 hours at 25 °C, no alarms or
backlighting
Case High-impact plastic, dust and weather proof
Standard
Accessories
• Rubber protective boot
• Alligator clip

3 • Specifications GP-03 Operator’s Manual
Optional Accessories • Calibration adapter
• Calibration kit
• Belt clip
• Wrist strap
• IrDA/USB cable for downloading data to computer
• Product CD, includes 03 Series Datalogging Program and
03 Series User Setup Program
Dimensions and
Weight
2.2” (54mm) W x 2.6” (67mm) H x 0.9” (24mm) D;
2.8 oz. (80 g)
Operating Temp. &
Humidity
-20°C to +50°C, below 90% RH (non condensing)
*The GP-03 is also available set up for general hydrocarbons and calibrated to a
combustible gas other than methane, such as isobutane. Consult RKI Instruments,
Inc. for further information.
Table 1: GP-03 Specifications

GP-03 Operator’s Manual Description • 4
Description
This section describes the components of the GP-03.
Case
The GP-03’s sturdy, high-impact plastic case is blue and consists of a front
case and a rear case. The case is suitable for use in many environmental
conditions, indoors and out. The unit is dust proof and weather resistant.
The front case has an LCD (liquid crystal display) that shows various
indications. Below the LCD are two black control buttons. The left button is
labeled “AIR” and the right button is labeled “POWER MODE”.
The buzzer opening is located in the top left corner of the front case. To the
right of the buzzer is the diffusion port for the sensor.
The alarm LED lens is located at the top of the front case.
The battery compartment is located in the rear case. Access to the
compartment is accomplished by turning the captive battery cover screw
counterclockwise and by removing the battery cover.
There are two spring bars on the rear case. One is on the left and one is on
the right. They are the same type of spring bar that is used to retain a
watch band and are used to mount the alligator clip or optional belt clip.
A feature in the lower left corner of the rear case is used to install the
optional wrist strap.
Battery Cover Screw
Battery Cover
CO
AIR
CO-03
LCD
Buzzer Opening
IrDA Port
Control Buttons Wrist Strap
Connection
POWER
MODE
Diffusion Port
Alarm LED
Figure 1: Components of the GP-03

5 • Description GP-03 Operator’s Manual
Sensor Gasket, Sensor Membrane, and H2S Filter Disk
The sensor gasket seals against the sensor and retains the sensor
membrane and filter disks.
Two types of paper-like filter disks may be installed beneath the sensor
gasket. The white disk is the sensor membrane. The dark red disk is the
H2S filter disk.
The sensor membrane is held in place by the sensor gasket and fits into a
recessed area on the inside of the front case. The sensor membrane
covers the diffusion port and protects the sensor from dirt and moisture.
The sensor membrane should be inspected periodically and replaced if
contaminated by dirt or moisture. See “Replacing the Sensor Membrane
and H2S Filter Disk” on page 64 for sensor membrane replacement
instructions.
The H2S filter disk is not installed in the GP-03 as shipped from the factory.
It can be installed to protect the combustible gas sensor from H2S
exposure if H2S will be present in the monitoring area. If monitoring for a
gas other than methane, consult RKI Instruments, Inc. before installing an
H2S filter disk. Some combustible gases can be absorbed by the H2S filter
disk. One H2S filter disk fits in between the sensor membrane and the
sensor gasket. If installed, it prevents H2S in the ambient air from reaching
the unit’s combustible gas sensor. Removing H2S that is present in the
monitored air prolongs the life of the sensor. The H2S filter disk is dark red
in color and although it may darken over time, its color is not indicative of
remaining filter life. The H2S filter disk can absorb H2S for 33 ppm hours
and should be replaced after that much exposure. With this many ppm
hours of absorption, the H2S filter disk should be replaced after 80 minutes
of exposure to 25 ppm H2S. This equates to replacing the H2S filter disk
after 40 2-minute calibrations with a cylinder containing 25 ppm H2S. If H2S
exists in the monitoring environment, the H2S filter disk will have to be
replaced more frequently.
NOTE: See “Combustible Gas Detection” on page 18 for a discussion of
when the H2S filter disk should be used and how it affects
detection of certain gases.
Combustible Gas Sensor
The combustible gas sensor detects combustible gas and vapors in the
atmosphere with a catalytic element. The reaction of gas with oxygen on
the catalyst causes a change in the resistance of the element, which affects
the current flowing through it. The current is amplified by the GP-03’s
circuitry, converted to a measurement of combustible gas concentration,
and displayed on the LCD.

GP-03 Operator’s Manual Description • 6
CAUTION: Do not expose the combustible gas sensor to high
concentrations of combustible gas such as those found in a
butane lighter. Exposure to high concentrations of combustible
gas may adversely affect the performance and life of the
combustible gas sensor.
LCD
The LCD is visible through the front case. When the GP-03 is in Measuring
Mode, the target gas concentration, battery condition, and alarm
indications are displayed on the LCD. Various other items are displayed
when the LCD is in other modes, such as Calibration Mode. When either of
the two control buttons are pressed, the LCD backlight comes on for 20
seconds.
Control Buttons
Below the LCD are two control buttons: POWER MODE and AIR. The
POWER MODE button turns the GP-03 on and off. The functions
performed by the control buttons are summarized in the following table:
Alarm LED
The GP-03 has one red alarm LED. It alerts you to gas, low battery, and
sensor failure alarms. The alarm LED is located at the top of the front case
beneath a clear lens.
Table 2: GP-03 Control Buttons
Button Function
POWER MODE
• Turns the unit on and off.
• Turns the LCD back light on.
• Resets the alarm circuit (gas alarms).
• Enters Display Mode.
• Enters Calibration Mode with the AIR button.
• Enters Setup Mode with the AIR button.
AIR
• Turns the LCD back light on.
• Adjusts LCD reading when the fresh air
adjustment is performed.
• Enters Calibration Mode with the POWER MODE
button.
• Enters Setup Mode with the POWER MODE
button.
• Increases or decreases settings when the unit is in
Calibration Mode or Setup Mode.

7 • Description GP-03 Operator’s Manual
Buzzer
A solid-state electronic buzzer is mounted inside the GP-03. An opening in
the top left corner of the front case allows the buzzer’s sound to emanate
from the case. The buzzer sounds for gas alarms, unit malfunctions, and
the dead battery alarm. It also serves as an indicator during normal use of
the various LCD display options.
Vibrator
A vibrating motor (vibrator) is mounted inside the GP-03. The vibrator
vibrates momentarily during the power-up sequence and for gas alarms.
IrDA Port
An infrared (IR) communications port is located just to the left of the alarm
LED at the top of the front case beneath the clear lens. The data
transmitted through the port is in standard IrDA protocol. A computer’s
infrared port or an IrDA/USB cable connected to a computer’s USB port
can be used to download data saved by the GP-03 to a computer using the
03 Series Data Logger Management Program. See the 03 Series Data
Logger Management Program operator’s manual for data logging and
downloading instructions.
Printed Circuit Board
The primary function of the GP-03’s printed circuit board is to amplify the
signal sent to it from the sensor, convert the signal to a meaningful
measurement of gas concentration, display the gas concentration on the
LCD, store peak gas readings, and activate the alarm circuit if an alarm
point has been reached. It monitors battery level, battery failure, and
sensor failure. It also controls various operating modes of the unit.
NOTE: The printed circuit board contains no user serviceable parts.
Batteries
Two AAA-size alkaline batteries (standard) or two Ni-MH AAA batteries
(optional) run the GP-03. At 25°C the alkaline batteries last at least 35
hours and the Ni-MH batteries last at least 30 hours. The battery icon on
the LCD shows remaining battery life.
When the GP-03 detects low battery voltage, a low battery warning is
activated. When battery voltage is too low for normal operation, the GP-03
sounds a dead battery alarm.
The alkaline and the Ni-MH batteries can be replaced by removing the
battery cover on the rear case. Turn the captive battery cover screw
counterclockwise to release the door. See “Replacing or Recharging the
Batteries” on page 60 for detailed battery changing instructions.

GP-03 Operator’s Manual Description • 8
WARNING: To prevent ignition of a hazardous atmosphere, batteries
must only be changed in an area known to be
nonhazardous.
AVERTISSEMENT:Pour éviter l’inflammation d’une atmosphère
dangereuse, les batteries doivent uniquement être
modifiés ou facturés dans une zone connue comme non
dangereuse.
NOTE: Use of batteries not specified by RKI Instruments, Inc. will void the
CSA classification and may void the warranty. See “Replacing or
Recharging the Batteries” on page 60.
Protective Rubber Boot
A protective rubber boot is installed over the GP-03.
Figure 2: Rubber Boot
Side Front

9 • Description GP-03 Operator’s Manual
Alligator and Belt Clips
The GP-03 is available with two types of clips: the alligator clip (standard)
and the belt clip (optional). The alligator clip is shown in Figure 3 below.
The alligator clip can be used to attach the GP-03 to clothing or a belt.
Teeth in the clip’s jaws prevent the unit from slipping off. The clip can be
rotated in 45 degree turns if necessary.
Figure 3: Alligator Clip
The belt clip is shown in Figure 4 below and is used to easily clip the GP-03
on a belt.
Figure 4: Belt Clip
Open
Alligator Clip
Closed
Belt Clip

GP-03 Operator’s Manual Start Up • 10
Start Up
This section explains how to start up the GP-03 and to get it ready for
operation.
CAUTION: Beforeeach day’s usage sensitivity must betested on a known
concentration of the combustible target gas, typically methane,
equivalent to 25 - 50% of full scale. Accuracy must be within
-0% to +20% of concentration. Accuracy may be corrected by
following the calibration instructions in “Calibration Mode” on
page 28.
Start-up Procedure
1. Press and briefly hold down the POWER MODE button. The backlight
will turn on and all the display segments will turn on. Release the button
when you hear a beep.
2. The vibrator vibrates and the alarm light flashes momentarily.
3. The initial startup screen depends on how Bump Fail Behavior is set.
This parameter along with the Cal. Limit Display and Cal. Limit Check
parameters mentioned in Step 5 and the Auto Zero Adjustment
parameter mentioned in Step 12 below cannot be set using the GP-03’s
instrument menus, but are set using the 03 Series User Setup Program.
See the 03 Series User Setup Program Operator’s Manual for
information regarding changing various instrument parameters that are
not available for adjustment in the instrument’s operating modes.
•If Bump Fail Behavior is set to None (factory setting) or if it is set to
Can Not Use and the most recently performed bump test passed,
proceed to Step 5.
•If Bump Fail Behavior is set to Can Not Use using the 03 Series
User Setup Program and the most recently performed bump test
failed, the following screen will appear.
The instrument cannot be used until a successful bump test or
calibration is performed. See “Calibration Mode” on page 28 for
instructions.
4. If Cal. Limit Display is set to Off, proceed to Step 6.
C.AL
FAIL

11 • Start Up GP-03 Operator’s Manual
5. If Cal. Limit Display is set to On (factory setting), the screen that
appears next depends on how Cal. Limit Check is set.
• If the unit is due for calibration and Cal. Limit Check is set to
Confirm to use (factory setting), then the following screen sequence
will occur.
The alarm LED and buzzer will pulse several times.
To continue the startup sequence without performing a calibration,
press and release the AIR button. Continue to Step 6.
To perform a calibration, press and release the POWER MODE
button. Depending on the value entered into the One Touch Cal
Time parameter using the 03 Series User Setup Program, the
instrument will display either the A--CAL menu item or the E--CAL
menu item in Calibration Mode. The instrument will display the A--
CAL menu item in Calibration Mode. See “Calibration Mode” on
page 28 for instructions.
WARNING: You must press either the POWER MODE or AIR button to
continue. If you do not press a button, the buzzer will
continue to beep and the LED will continue to flash for 6
seconds every 5 seconds.
MODE
C.LIMIT
CAL
YES
C.LIMIT
CAL
AIR
C.LIMIT
CAL
NO
C.LIMIT
CAL
C.LIMIT
CAL
C.LIMIT
CAL

GP-03 Operator’s Manual Start Up • 12
• If the unit is due for calibration and Cal. Limit Check is set to Can’t
use, then the following screen sequence will occur.
The alarm LED and buzzer will pulse several times. Press and
release the POWER MODE button. Depending on the value entered
into the One Touch Cal Time parameter using the 03 Series User
Setup Program, the instrument will display either the A--CAL menu
item or the E--CAL menu item in Calibration Mode. The above
screen will remain on the display until the unit is either turned off or
Calibration Mode is entered. The GP-03 cannot be used until a
complete calibration has been performed either by selecting A--
CAL, E--CAL, or M--CAL in the Calibration Mode menu. See
“Performing an Automatic Span Adjustment in A--CAL” on page 31,
“Performing an Easy Span Adjustment in E--CAL” on page 36, or
“Performing a Manual Span Adjustment in M--CAL” on page 41 for
calibration instructions.
WARNING: You must perform a successful calibration in order to
continue to normal operation. If you do not perform a
successful calibration, the screen sequence will
continue, the buzzer will continue to beep and the LED
will continue to flash for 6 seconds every 5 seconds and
the unit will not enter normal operation.
• If a calibration is due and Cal. Limit Check is set to None, the
sequence below will occur twice.
Press and release the POWER MODE button during this time to go
MODE
C.LIMIT
FAIL
YES
C.LIMIT
FAIL
C.LIMIT
FAIL
MODE
C.LIMIT
YES
C.LIMIT
C.LIMIT
0d 0d 0d

13 • Start Up GP-03 Operator’s Manual
to the A--CAL or E--CAL menu item in Calibration Mode depending
on the value entered into the One Touch Cal Time parameter of the
03 Series User Setup Program. If no button is pressed, the
instrument will continue with the warmup sequence in Step 6 once
the sequence shown above has finished.
• If a calibration is not due, then the following screens appears for a
few seconds indicating when the next calibration is due. “NEXT” and
“CAL” alternate on the bottom of the screen.
NOTE: The following screens in Step 7 only appear if Bump Test Limit
Display is set to On using the 03 Series User Setup Program. The
standard factory setting for this function is Off.
6. If Bump Test Limit Display is set to Off (factory setting), proceed to
Step 8.
7. If Bump Test Limit Display is set to On using the 03 Series User Setup
Program, the next screen will depend on how Bump Test Limit Check
is set in Setup Mode or using the 03 Series User Setup Program.
• If the unit is due for bump testing and Bump Test Limit Check is set
to Confirm to use (factory setting), then the following screen
sequence will occur.
CAL.
14. 2.17
180d
NEXT
14. 2.17
180d
BUMP
teSt
YES
NOW
teSt
MODE
BUMP
teSt
NOW
teSt
NO
BUMP
teSt
AIR
NOW
teSt

GP-03 Operator’s Manual Start Up • 14
The alarm LED and buzzer will pulse several times.
To continue the startup sequence without performing a bump test,
press and release the AIR button. Continue to Step 8.
To perform a bump test, press and release the POWER MODE
button. The instrument will display the BUMP menu item in
Calibration Mode. See “Performing a Bump Test in BUMP” on
page 44 for instructions.
WARNING:You must press either the POWER MODE or AIR button to
continue. If you do not press a button, the screen
sequence will continue, the buzzer will continue to beep
and the LED will continue to flash for 6 seconds every 5
seconds.
• If the unit is due for bump testing and Bump Test Limit Check is set
to Can’t use, then the following screen sequence will occur.
The alarm LED and buzzer will pulse several times. Press and
release the POWER MODE button to go to the BUMP menu item in
Calibration Mode. The above screens will remain on the display until
the unit is either turned off or Calibration Mode is entered. The GP-
03 cannot be used until a bump test has been performed. See
“Performing a Bump Test in BUMP” on page 44 for bump test
instructions.
WARNING:You must perform a successful bump test in order to
continue to normal operation. If you do not perform a
successful bump test, the buzzer will continue to beep and
the LED will continue to flash for 6 seconds every 5
seconds and the unit will not enter normal operation.
BUMP
FAIL
YES
NOW
FAIL
MODE
BUMP
FAIL
NOW
FAIL

15 • Start Up GP-03 Operator’s Manual
• If a bump test is due and Bump Test Limit Check is set to None,
the sequence below will occur twice.
Press and release the POWER MODE button during this time to go
to the BUMP menu item in Calibration Mode. If no button is pressed,
the instrument will continue with the warmup sequence in Step 8
once the sequence shown above has finished.
NOTE: If a successful calibration is performed, the next bump test date is
reset and starts over even though a bump test was not performed.
• If bump testing is not due, then the following screen appears for a
few seconds indicating when the next bump test is due. “NEXT” and
“BUMP” alternate on the bottom of the screen.
8. The Date/Time Screen appears for a few seconds.
This screen displays the current date and time.
9. The Battery Voltage Screen appears for a few seconds.
MODE
BUMP
YES
BUMP
BUMP
0d 0d 0d
BUMP
14. 2.17
180d
NEXT
14. 2.17
180d
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