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Bacharach H-25C Instruction

Industrial halogen leak detector
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H-25C
INDUSTRIAL HALOGEN LEAK DETECTOR
Instruction 3015-0216
Operation & Maintenance
Rev.0
Product Leadership
Training
Service
Reliability

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Summary of Contents for Bacharach H-25C

  • Page 1 H-25C INDUSTRIAL HALOGEN LEAK DETECTOR Instruction 3015-0216 Operation & Maintenance Rev.0 Product Leadership Training Service Reliability...

  • Page 2: Table Of Contents

    H-25C Instruction Manual Table of Contents Introduction ..........................4-9 1. H-25C Leak Detector Applications........................4 2. Unpacking and Initial Checks..........................4 3. Warranty................................4-5 4. Procuring and Storing Frequently Replaced Maintenance Items ..............5 5. Operating Precautions ............................5-6 6. Preparing for Use ..............................7-8 7. Special Symbols and Formatting Used in this Manual ..................9 1.
  • Page 3 Product improvements and enhancements are continuous; therefore the specifications and information contained in this document may change without notice. Bacharach, Inc. shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material.

  • Page 4: Introduction

    The H-25C Halogen Leak Detector is an instrument that will detect leaks of freon gases such as HFC 134a and CFC 12, which are used as coolants in electric refrigerators, commercial freezers, and automotive air conditioners.

  • Page 5: Warranty

    Operating Precautions 5.1 Precautions Regarding High-Temperature Parts and High-Voltage Circuits Parts of the H-25C operate at high temperatures and voltages. Be very careful not to touch these parts, as burns or electric shock will result. Always take precautions to discharge static electricity from your body before touching the ROM or associated circuits.

  • Page 6: Preparing For Use

    Use the H-25C only indoors or in an equivalent environment. When storing the H-25C, select a location where it will not be exposed to corrosive gases or high humidity. To obtain the best leak detection performance, keep the following in mind: Ventilate the work area well so that contaminants cannot accumulate in the air.
  • Page 7 H-25C Instruction Manual The parts in instruments manufactured before September '94 are different. Instruction 3015-0216...

  • Page 8: Preparing For Use

    Note: The above table- shows the basic procedures for preparing to use the H-25C with auto calibration, and the measurement and calibration. : Check how measurements are made with the measurement mode set to A-type. Note that B-type mode is generally used for detecting leaks.

  • Page 9: Special Symbols And Formatting Used In This Manual

    H-25C Instruction Manual Special Symbols and Formatting Used in This Manual The Display State (Lit or Flashing) is Indicated in Figures as follows: Instruction 3015-0216...

  • Page 10: Names And Functions Of Components

    H-25C Instruction Manual NAMES AND FUNCTIONS OF COMPONENTS (Model codes, specifications, gases measured, calibration gas flow) 1.1 Setup Area Details Instruction 3015-0216...

  • Page 11: Model Codes

    H-25C Instruction Manual 1.2 Model Codes MODEL SUFFIX CODES DESCRIPTION H-25C Auto CAL No (calibrate manually with external gas function source Yes (both auto and manual calibration possible) Contact Output No Relay Yes Dry Contact Relay Output Supply voltage 100/115 V, 50/60 Hz...

  • Page 12: Specifications

    H-25C Instruction Manual 1.3 SPECIFICATIONS Specifications Gas Measured: R134a or R12 gas Sensor: Cationic emission type sensor Measurement Range: 9x10 to 9x10 std. ml/s, 1.5 to 150 g/yearly, 0.05 to 5.0 oz/yearly) Note: One std. ml/s: Flow volume per second, converted to equivalent gas at 0° C 1 atm.

  • Page 13: Probes

    H-25C Instruction Manual 1.4 Probes 1.5 Accessories and Maintenance Tool List Item Name Part Number Remarks Filter (For S-type probe) 3015-1820 Unit of purchase : 1 piece Filter, O-ring (for L-type probe) 3015-1705 Unit of purchase : 1 set (one piece each) Activated –...

  • Page 14: Internal Flow List

    H-25C Instruction Manual 1.6 Internal Flow Paths Measured Gas Internal Flow Path Instruction 3015-0216...

  • Page 15: Preparing For Use

    H-25C Instruction Manual PREPARING FOR USE This section explains the switch settings and other procedures that must be done to prepare the instrument for use. For operating instructions, see Section 4. Installing the Sensor Note: The sensor may deteriorate during storage due to the effects of water vapor in the air. Therefore, the instrument is shipped with the sensor removed and sealed in a humidity-excluding bag.

  • Page 16: Setting The Switches

    Or 120/240 VAC. The frequency can be either 50 or 60 Hz. Use the supply voltage selector switch on the rear of the H-25C to select 100 and 115 V, 110 and 220 V, or 120 and 240V. Set the supply voltage selector switch to the side labeled appropriate to the AC line voltage you intend to use.

  • Page 17: Setting The "Relay" (Relay State Selector) Switch

    H-25C Instruction Manual 2.2.4 Setting the “RELAY” (Relay State Selector) Switch Note: The “RELAY” switch (3) must be set if the instrument is equipped with the alarm contact signal output function. The alarm contact signal is output when the leak flow is greater than or equal to the alarm setting.

  • Page 18: Setting The "Mode

    H-25C Instruction Manual 2.2.5 Setting the “MODE” (Measurement Mode Selector) Switch Select the measurement mode using the MODE (measurement mode selector) switch. There are two measurement modes, A-type and B-type. For detecting leaks in a normal atmosphere, set the switch to B-type. (The factory setting is A-type mode.) Select A-type mode if the atmosphere at the measurement site is always clean (extremely small quantity of unwanted gas).

  • Page 19: Setting The "Cal" (Calibration Mode Selectorl) Switch

    2.2.8 Setting the “CAL INTVL” (Calibration Request Interval) Switch The H-25C can issue requests for calibration operations at fixed intervals when A-type measurement mode is selected. At the time of the calibration request, the speaker sounds an intermittent tone for five seconds, and “CAL”...

  • Page 20: Setting The "Gain" (Search Mode Sensitivity)

    H-25C Instruction Manual 2.2.9 Setting the “GAIN” (Search Mode Sensitivity) Switch The setting results here are valid only for the search mode I A-type measurement mode. Raising the sensitivity in order to detect lower values makes it easier to locate leaks.

  • Page 21: Connecting The Probe

    Also, be careful where you place the probe, so that you never allow it to such in any liquid. When you first use the H-25C Halogen Leak Detector, you must adjust the calibration gas secondary pressure within three minutes of the time that you apply power (if it has the auto calibration function). So, before turning ON the power switch, remove the cover from the main unit.
  • Page 22 H-25C Instruction Manual When power is applied, the display will appear as shown below. Instruction 3015-0216...

  • Page 23: Calibration Gas Secondary Pressure Adjustment

    In principle, the H-25C is shipped with the calibration gas secondary pressure temporarily adjusted. This section shows, however, the adjustment should be made with the tank valve closed. If it has been temporarily adjusted, make the re-adjustment according to step (3) of the following adjustment procedure give below.

  • Page 24: Calibration

    H-25C Instruction Manual The above operations complete the calibration gas secondary pressure adjustment. Replace the cover of the main unit. When warm up ends, the instrument will go into measurement mode. The bar graph indication displays the amount of leakage. When the probe switch is not being...

  • Page 25: Adjusting The Speaker Tone Volume

    H-25C Instruction Manual Adjusting the Speaker Tone Volume The speaker volume is adjustable. Adjust if necessary (to the appropriate level for the area where you will use the instrument) using the tones heard while performing the calibration operation of Section 2.7.

  • Page 26: Calibration

    H-25C Instruction Manual 3. CALIBRATION The Model H-25C Halogen Leak Detector performs calibration when the detector is first used (including sensor sensitivity adjustment and sensor replacement) or when " calibration request " appears in A-type measurement mode. Calibration data are maintained for about three weeks after calibration, then returned to the default values, after which the instrument must be calibrated again.
  • Page 27 H-25C Instruction Manual BACHARACH Instruction 3015-0216...

  • Page 28: Auto Calibration

    Note : The calibration gas always flows out from the 'CAL PORT" at a flow rate corresponding to the secondary pressure. Note that the calibration gas used in the H-25C's optional built-in leak standard is R 134a. At a secondary pressure of 170 kPa {1.7 kgf/cm } this cal gas will flow out from the "...
  • Page 29 H-25C Instruction Manual Continue to hold the probe in the inserted position until the countdown (starting from 7) on the display reaches 0. (Leave the instrument in search mode; do not press the pass/fail switch on the probe.) When the countdown reaches 0, the instrument’s internal circuits store the data required for calibration.

  • Page 30: What To Do If The Cal Fail Indicator Appears

    H-25C Instruction Manual 3.1.3 What to Do If the CAL FAIL Indicator Appears If the CAL FAIL indicator appears during calibration, no calibration is performed. When CAL FAIL indicator appears, one of the following five fail codes is displayed on the data display area while the instrument stabilizes.

  • Page 31: Manual Calibration

    Start the calibration procedure as follows: (1) Insert the probe into the H-25C "CAL PORT" to apply an ON signal through the spring switch. Note : When an S-probe is used, carry out this operation after removing the tube for introducing gas.

  • Page 32: What To Do If The Alarm Code Appears

    H-25C Instruction Manual 3.2.4 What to Do If the Alarm Code Appears Unlike when the fail code is displayed, calibration is performed when the alarm code is displayed. When the data for calibration approaches the allowable limit, an error code (A-1 to A-3) is displayed for about four seconds before completing calibration.

  • Page 33: Measurement Operations

    (2) Wiring the Analog Signal Output (if equipped with analog signal output function) If you wish, you can order the H-25C with a function that outputs the measured value as a 0 to 1 V DC analog signal. If your instrument has this function, connect the wiring from the instrument to the recorder or other destination.
  • Page 34 Wiring the Alarm Contact Output Terminals (if equipped with contact output function) (3) If you wish, you can order the H-25C with a function that outputs a contact signal when the measured value exceeds the alarm point. If your instrument has this function, connect the wiring from the instrument to signal destination.
  • Page 35 H-25C Instruction Manual Is the "AIR FLOW" Indicator On ? (Check in measurement mode) The " AIR FLOW" indication tells you that the intake air flow is being reduced due to clogging of the probe air filter, or some other cause.

  • Page 36: Measurement

    The tone and the lamp are switched off when the value is 20% below the alarm point. If the H-25C is equipped with an alarm contact output, then if the leak rate reaches the alarm point, a contact signal is output. This contact signal is also switched off when the value falls to 20% below the alarm point.
  • Page 37 H-25C Instruction Manual Note : The search mode alarm point simply represents the value of the 100% point determined by the sensitivity ("GAIN" switch setting). The search mode alarm point does not initiate any action. Whenever the sensor output level is below the search trigger point (the 20% point on the bar graph), the "...
  • Page 38 H-25C Instruction Manual Select B-type Mode for Detecting Leaks (see Subsection 4.2.3) If the background potential is always varying, this is an effective aid to leak inspection. [Auto-zero] The sensor will output some voltage even for pure air. This is called the background voltage (or potential, or level). If freon and I or other gases are present in the ambient atmosphere, voltage components due to those gases will add to the background voltage.

  • Page 39: Leak Rate Measurement In B-Type Mode

    If the H-25C equipped with an alarm contact output, then if the leak rate reaches the alarm point, a contact signal is output. This contact signal is switched off when the value falls to 20% below the alarm point.

  • Page 40: How To Check The Measured Value, And Possible Reasons For Abnormal Operation

    H-25C Instruction Manual 4.2.6 How to Check the Measured Value, and Possible Reasons for Abnormal Operation [How to Check the Measured Value] To check for error in the measured value, set a leak standard for a known constant leak rate, let the probe suck in the gas, and examine the indicated value.

  • Page 41: Turn The Power Switch Off

    H-25C Instruction Manual " Calibration requests " are being issued too frequently. Activated charcoal filter performance is deteriorating. " CAL FAIL " indicator is displayed (flashing). Calibration gas freon in the tank has been used up. (See Section 5.3 for corrective action.) Unable to calibrate ("CAL FAIL"...

  • Page 42: Leak Detection

    12. This causes any unwanted gas in the atmosphere to have large effects, resulting in disturbances, and this also affects the service life of the sensor. If the H-25C is used for detecting R-12 leaks then perform the following calibration procedures.

  • Page 43: Maintenance

    H-25C Instruction Manual MAINTENANCE Regular maintenance of your H-25C is required to maintain its performance. This chapter explains how to perform scheduled periodic replacements of consumable items and those parts that are known to deteriorate over time. For guidance on what to do in the unlikely event trouble occurs due to other causes, see Chapter 6.

  • Page 44: Replacing The Activated Charcoal Filter

    In general, if you are using the H-25C seven hours a day, an activated charcoal filter can be used for 30 to 60 days. We recommend that you schedule periodic replacements using these numbers as guidelines. If the measurement check described in Subsection 4.2.6 reveals error in the measurement, you should replace the filter...
  • Page 45 H-25C Instruction Manual Install the filter in the case as follows: (a) First, squeeze the filter to fit it into the circular case. (see figure 5.3) (b) Insert the filter into the case. Holding the seam 1) of the filter, fold both sides 2) and C3 into the case, then push them down into the case.

  • Page 46: Refilling The Tank With Freon

    H-25C Instruction Manual Refilling the Tank With Freon This maintenance operation is applicable only if the instrument has the auto calibration option. The R134a held in the tank for calibration use is consumed at a rate of 10 x 10-5 std. ml/s. When the calibration gas secondary pressure indication on the bar graph drops to the 1 00% point ( 98 kPa I 1.0 kgf/CM2 1), refill the...

  • Page 47: Replacing The Sensor

    H-25C Instruction Manual handle), allowing the air to be expelled as the liquid R - 134a enters. After a short while some misty liquid R 134a will begin to spray out in a mist. Wait about 10 seconds after the mist begins spraying out, and then close the tank valve. Also be sure to close the service cylinder valve.

  • Page 48: Replacing The Disc Filter

    These fuses are attached to a cover, which also serves as the fuse holder; use a flat-blade screwdriver to open this cover. If the fuse connected in the circuit is open, replace it with the spare fuse. [Fuse Ratings] - 3.15A, 250V, fast-blow, miniature type (Bacharach part number: K9346JD) Instruction 3015-0216...

  • Page 49: Troubleshooting

    Never connect 240 V power when the supply voltage selector switch is set to a 100 V range Note: The H-25C is offered in three versions : 100 / 115 V, 110 / 220 V, 120 / 240 V power.

  • Page 50: Possible Causes Of Malfunctions, And What To Do If They Occur

    (rod) is loose. For the L-type probe, check whether or not the 0 - ring is in place. (3) Tubing not connected to sensor. (2) Sensor failure. Replace with good sensor. Note: If the sensor is not heating up, return the instrument to Bacharach for repair. 6.2.3 Measured Value is Too Low The three most likely causes are: (1) Not properly calibrated.

  • Page 51: Measured Value Is Too High

    (2) Air is leaking into the probe through the probe seal ( 0 -ring or gasket Check whether or not the nut (rod) is loose. For the L-type probe, check whether or not the 0 -ring is in place. (3) Contamination deposited on manifold internal flow path surfaces. Return to Bacharach for repair (component replacement).

  • Page 52: Liquid R134A In Tank Used Up Too Quickly

    [If occurring during countdown at power-on:] Note: Verify that the steady-on or flashing condition recurs. (1) EEPROM failure. Return to Bacharach for repair (component replacement, adjustment). [If occurring during calibration] (2) Sensor sensitivity outside of permissible range. Adjust sensor sensitivity (See Subsection 3.1.3) (3) Sensor has reached end of life.

  • Page 53: [Reference] Facilities For Ridding The Atmosphere Of Unwanted Gases Where Leakage Inspections Are Made

    Gases Where Leakage Inspections Are Made Sensors in the H-25C Halogen Leak Detector sense exhaust gases from automobiles and volatilized gases from organic solvents, floor cleaning agents, and -paint as well as halogen gases including freon. Thus, if any of these gases are in the surrounding atmosphere of locations when inspections for leakage are made, the following two problems may occur.
  • Page 54 H-25C Instruction Manual [Example of Facility 2] Reference Figure 2 shows an example of facility for efficiently implementing leakage inspection. This facility is also provided with countermeasures to prolong the service life of sensors and activated charcoal filters. If the facility to be provided is similar to that shown in Reference Figure 2, take the following requirements into consideration.

  • Page 55: Customer Maintenance Parts List

    H-25C Instruction Manual Customer Maintenance Parts List Item Part No. Qty. Description Item Part No. Qty. Description 3015-1113 Pump Assembly 3015-2476 Filter 3015-4181 Regulator Assembly 3015-1092 Speaker 3015-1134 Regulator 3015-1182 Screw 3015-2753 O-Ring 3015-2757 O-Ring 3015-1209 Flow Sensor Assembly Probe...
  • Page 56 H-25C Instruction Manual Item Part No. Qty. Description 3015-1200 Tank Assembly w/freon 3015-2668 O-Ring 3015-2672 O-Ring 3015-2676 O-Ring 3015-0947 O-Ring 3015-1545 Printed-circuit Assembly Printed-circuit Assembly 3015-2096 (For 100/115V power) 3015-2102 (For 100/115V power. With output 3015-2108 signal) (For 120/240V or 110/220 V power) 3015-2114 (For 120/240V or 110/220V power.

  • Page 57: Sales / Service Centers

    Toll Free in Canada: 800-328-5217 E-mail: bachcan@idirect.com Bacharach Sales/Service Center - Georgia 2 Dart Road MEXICO Newnan, GA 30265-1094 Bacharach de México S.de R. L. de C.V. Tel.: 678-423-2481 Sales/Service Center Fax: 678-423-2479 Playa Regatas No. 473 Tercer Piso E-mail: kayes@bacharach-inc.com Col.
  • Page 58 H-25C Instruction Manual Notes: Instruction 3015-0216...
  • Page 59 World Headquarters 621 Hunt Valley Circle, New Kensington, PA 15068 Ph: 724-334-5000 • Fax: 724-334-5001 • Toll Free: 1-800-736-4666 Website: www.bacharach-inc.com • E-mail: help@bacharach-inc.com Printed in U.S.A.

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