PST GPR-1500 Loop Barrier Oxygen Analyzer User Guide

: June 14, 2024
: PST

Table of Contents

GPR-1500 Loop Barrier Oxygen Analyzer
Loop Barrier Oxygen Analyzer
Specifications
Product Usage Instructions
A. First Air Calibration
- GPR-1500
- GPR-2500
- FAQ
Q: What safety approvals and directives does the GPR-series of
Q: What is the purpose of the first air calibration?
Q: How long does it take for the sensor to stabilize during

GPR-1500 Loop Barrier Oxygen Analyzer

Loop Barrier Oxygen Analyzer

Specifications

Model: GPR-series
Safety Approvals and Directives: Compliant
Display Outline: Blue (general purpose), Red (hazardous
area)

Product Usage Instructions

A. First Air Calibration

GPR-1500

Apply power to the analyzer and open the front window using the
two latches.
Use the buttons to navigate to “Select Range”.
Press the “Enter” button to select “0-25% (Air Cal)”.
Open the sensor housing.
Remove the sensor from its packaging and remove the shorting
flags.
Place the sensor in the top sensor housing.
Hold the sensor away from any gas stream and wait for it to
stabilize (approximately 2-3 minutes).
Press the “Enter” button on the analyzer.
Use the buttons to navigate to “Calibration > Span
Calibrate”.
Use the buttons to enter the value “20.90%” and wait for the
reading to stabilize.
Press the “Accept” button to accept the calibration or press
the “Abort” button to abort.
Secure the sensor with the star wheel at the bottom of the
housing assembly.
Close the analyzer and proceed to section B.

GPR-2500

Apply power to the analyzer and open the front window using the
two latches.
Use the buttons to navigate to “Select Range”.
Press the “Enter” button to select “0-25% (Air Cal)”.
Disconnect the sensor cable by turning the lock nut
counter-clockwise.
Remove the sensor from its base by unscrewing it
counter-clockwise, then reconnect the sensor cable.
Hold the sensor and its cable away from any gas stream and wait
for it to stabilize (approximately 2-3 minutes).

FAQ

Q: What safety approvals and directives does the GPR-series of

loop barrier oxygen analyzers comply with?

A: The GPR-series of loop barrier oxygen analyzers are compliant
with safety approvals and directives.

Q: What is the purpose of the first air calibration?

A: The first air calibration is of utmost importance as all
subsequent calibrations are based on the initial one.

Q: How long does it take for the sensor to stabilize during

first air calibration?

A: After placing the sensor in the top sensor housing, it takes
approximately 2-3 minutes for the sensor to stabilize.

Loop Barrier Oxygen Analyzer Quick Start Guide First air calibration and measurement PST-QSG-3206-1.1
ProcessSensing.com 07/2023

Loop Barrier Oxygen Analyzer Quick Start Guide First air calibration and measurement

Welcome to the Quick Start Guide for first air calibration and first measurement using your loop barrier analyzer.

Here, you will find information covering first air calibration in section A, and connecting to your process gas in section B to make your first measurement in section C. Please read the safety information below.

Start here

The GPR-series of loop barrier oxygen analyzers is compliant with the following safety approvals and directives:

Safety information
· Avoid covering the vent for the test flow indicator when gas is flowing to
the sensor. This can pressurize the sensor causing damage.
· To remove moisture and particulates, open the sensor housing and either
blow on the sensing surface or gently wipe the surface with a damp cloth. Ensure ppm sensors have minimal exposure to air.
· You must connect the analog signal output to a recording device in
accordance with local safety directives.
The first calibration is of utmost importance as all subsequent calibrations are based on the initial one.
NOTE: We recommend you use certified span gas for calibration; if this is not available to you, follow these instructions to carry out an air calibration.

A unit with a blue display outline is for general purpose only, red is for hazardous area, as shown above.

User Interface (UI)
Button

Function Menu

Enter

Previous (decrement)

Next (increment)

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Loop Barrier Oxygen Analyzer Quick Start Guide First air calibration and measurement

A. First air calibration

GPR-1500

The GPR-1500 is delivered without the sensor installed to preserve its operational life. To install the sensor:

1. Apply power to your analyzer (refer to Figure 4 on page 5). 2. Using the two latches, open the front window.

3. Use and to navigate to Select Range.

4. Press

to select 0-25% (Air Cal).

5. Open the sensor housing (refer to Figure 2 on page 5 for guidance).

6. Loosen the star wheel then disengage the top sensor housing by turning it 90° counter-clockwise. Refer to `b’ in Figure 2 on page 5.

7. Remove the sensor from its packaging, remove the shorting flags and immediately place in the top sensor housing (refer to Figure 1 on page 4).

8. Hold the sensor in the top sensor housing away from any gas stream. After 2…3 minutes the sensor is stable.

9. On your analyzer, press

.

10. Use and , navigate to Calibration > Span Calibrate.

11. Now use and to enter the value 20.90 %. Ensure the reading has stabilized before continuing.

NOTE: When a Span or Zero Cal starts, only “Abort” with is
shown until the reading is stable, then “Accept” with appears.

12. Use to Accept, and to Abort.
13. Now place the sensor into the bottom sensor housing with the gold contact plate facing upwards, (see Figure 1 on page 4 for guidance,) and replace the top sensor housing by placing it on top of the sensor and turning 90° clockwise.
14. Secure it with the star wheel at the bottom of the housing assembly (refer to `b’ in Figure 2 on page 5).
15. Quickly close your analyzer and continue immediately to section B.

GPR-2500
1. Apply power to your analyzer (refer to Figure 4 on page 5). 2. Using the two latches, open the front window.

3. Use and to navigate to Select Range.

4. Press

to select 0-25% (Air Cal).

5. Disconnect the sensor cable by turning the lock nut counter-clockwise (refer to Figure 3 on page 5 for guidance).

6. Remove the sensor from its base by unscrewing counter-clockwise, then reconnect the sensor cable.

7. Hold the sensor and its cable away from any gas stream. After 2…3 minutes the sensor is stable.

8. On your analyzer, press .

9. Use and , navigate to Calibration > Span Calibrate.

10. Now use and to enter the value 20.90 %. Ensure the reading has stabilized before continuing.

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Loop Barrier Oxygen Analyzer Quick Start Guide First air calibration and measurement

NOTE: When a Span or Zero Cal starts, only “Abort” with is
shown until the reading is stable, then “Accept” with appears.

11. Use to Accept. 12. Now disconnect the sensor cable from the sensor and screw the sensor into its
base before reconnecting the sensor cable. 13. Quickly close your analyzer, ensuring the gasket is firmly in place between
the door and the enclosure body, and continue immediately to section B.
B. Process gas connection
1. Connect your process gas line to one of the ports. 2. Ensure the gas is venting to atmosphere. 3. Ensure the flow rate is at 1…2 SCFH and allow the gas to flow for 2…3 min-
utes. This will purge the system.

Your analyzer is now ready to use.

C. Making your first measurement
1. Observe the reading on your analyzer to ensure the O2 concentration is trending downward.

2. When the O2 reading is in the desired sampling range, press analyzer.

on your

3. Use and to navigate to Select Range then press . 4. Use and to select your required operating range.

E.g. Response time: Sensor exposed to air for 2…3 minutes and installed in <1 ppmV O2 sample gas:

Reading 0.1 % 100 ppm 10 ppm > 1 ppm

Recovery time (Air to 0 ppm with N2 purge) 5 minutes
30 minutes
60 minutes
6-12 hours

NOTE: Response times are dependent on your analyzer model as well as your sensor.
D. Figures

Figure 1 – GPR-1500: Aligning your sensor

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