H-25C INDUSTRIAL HALOGEN LEAK DETECTOR Instruction 3015-0216 Operation & Maintenance Rev.
H-25C Instruction Manual Table of Contents Introduction ..................................................................................................................................4-9 1. 2. 3. 4. 5. 6. 7. H-25C Leak Detector Applications....................................................................................................................4 Unpacking and Initial Checks.........................................................................................................................
H-25C Instruction Manual 4. Measurement Operations .......................................................................................................33-42 4.1 Choosing a Location for the H-25C, and Getting Ready to Start Measurement ..............................................33 4.1.1 Choosing a location ...............................................................................................................................33 4.1.2 Getting ready for measurement.................................
H-25C Instruction Manual INTRODUCTION 1. 2. 3. 4. 5. 6. 7. 1. H-25C Halogen Leak Detector Applications Unpacking and Initial Checks Warranty Procuring and Storing Frequently Replaced Maintenance Items Operating Precautions Preparing for Use Special Symbols and Formatting Used in this Manual H-25C Halogen Leak Detector Applications Coolant leaks adversely affect the performance of refrigeration and air conditioning equipment.
H-25C Instruction Manual 3. Warranty Failures occurring within one year of the purchase date will be repaired free of charge if the problem is determined to clearly be the responsibility of BACHARACH. Note this warranty does not apply to the sensor and filters (probe filter, activated charcoal filter). 4. Procuring and Storing Frequently Replaced Maintenance Items You will need to procure certain maintenance items (see page 1 - 4) on a regular basis.
H-25C Instruction Manual 5.2 Avoiding Problems • Please strictly observe the following: Always power the H-25C from the proper AC line voltage for its specification. Always set the supply voltage selector switch to the proper position for the voltage in use. Transformer damage will result if you mistakenly connect a 100 V range instrument to a 200 V range power source. • Do not let the probe absorb liquid or highly concentrated halogen gas.
H-25C Instruction Manual The parts in instruments manufactured before September '94 are different.
H-25C Instruction Manual Preparing for Use & Measurement and Calibration Preparing for Use Operation Remarks 1. Install the sensor 2. Set the switches • Supply voltage selector switch • Type-of-gas selector switch • Measuring units selector switch (1) Measurement unit selection (2) Contact status selection at alarm output (3) Measurement mode ( A-type / B-type selection • Alarm point setting switches • Cal. Mode (auto / manual) selector switch • Cal.
H-25C Instruction Manual 7.
H-25C Instruction Manual 1. NAMES AND FUNCTIONS OF COMPONENTS (Model codes, specifications, gases measured, calibration gas flow) 1.
H-25C Instruction Manual 1.2 Model Codes MODEL SUFFIX CODES DESCRIPTION H-25C Auto CAL function -N -1 No (calibrate manually with external gas source Yes (both auto and manual calibration possible) No Relay Yes Dry Contact Relay Output 100/115 V, 50/60 Hz 120/240 V, 50/60 Hz 110/220 V, 50/60 Hz No Yes 0-1V DC Analog Output English Language Japanese Language 6 ft. mini-probe 15 ft. mini-probe 6 ft. probe 15 ft. probe (Standard) 25 ft. probe Type L, (6 ft.) H25B tip Type L, (15 ft.
H-25C Instruction Manual 1.3 SPECIFICATIONS Specifications Gas Measured: Sensor: Measurement Range: Alarm Point Setting Range: Measurement Modes: Measurement Units: Response Time: Calibration: Output Signal: Contact Output: Displays: Audio Speaker: Supply Voltage; Power Consumption: Dimensions: Weight: Instruction 3015-0216 R134a or R12 gas Cationic emission type sensor -5 -4 9x10 to 9x10 std. ml/s, 1.5 to 150 g/yearly, 0.05 to 5.0 oz/yearly) Note: One std.
H-25C Instruction Manual 1.4 Probes 1.5 Accessories and Maintenance Tool List Item Name Filter (For S-type probe) Filter, O-ring (for L-type probe) Activated – Charcoal pack Sensor Fuse (rating: 3.
H-25C Instruction Manual 1.
H-25C Instruction Manual 2. 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. 2.1 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. Install the sensor as follows: (1) Remove the sensor changer cover.
H-25C Instruction Manual 2.2 Setting the Switches 2.2.1 Setting the Supply Voltage Selector Switch Note: The H-25C comes with three different supply voltage specifications, 100/115 VAC, 100/200 VAC, 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.
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. The “RELAY” switch selects whether the relay is to be energized or de-energized at the time.
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). For details, see Subsection 4.2.
H-25C Instruction Manual 2.2.7 Setting the “CAL” (Calibration Mode Selector) Switch There are two calibration modes: automatic calibration mode and manual calibration mode. If the instrument is not equipped with the auto calibration function, then only manual calibration mode is valid. The calibration mode is selected using the “CAL” switch. To select auto calibration mode you set the switch to the “AUTO” position, and to select the manual calibration mode you set the switch to the “MANUAL” position. 2.2.
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. The sensitivity can be raised in search mode in A-type measurement mode, making it possible to find leaks with up to ten times (integer factor) the sensitivity of pass/fail mode used to measure leak flows.
H-25C Instruction Manual 2.3 Connecting the Probe Connect the accessory probe to the “PROBE” connection socket on the instrument front panel and secure it with the lock ring. Note that the probe connection socket gas intake port is covered with a protective cap, which you must remove before connecting the probe. Note: The Model H-25C detector can be fitted with a probe to satisfy all needs. 2.
H-25C Instruction Manual When power is applied, the display will appear as shown below.
H-25C Instruction Manual 2.6 Calibration Gas Secondary Pressure Adjustment Note: This adjustment is required in the instrument equipped with the auto calibration function. The calibration gas secondary pressure adjustment is done during the approximately three minutes of the warm-up period when the pressure is indicated on the bar graph. In principle, the H-25C is shipped with the calibration gas secondary pressure temporarily adjusted.
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 pressed, the instrument is in search mode and the indicated value is based on the value of the search mode alarm point value.
H-25C Instruction Manual 2.8 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. The volume is adjusted using the variable resistor labeled “AUDIO” in the setup area. 2.9 Allowing Air to Flow at the End of Preparation Completing the setup operations through Section 2.8 completes the preparations for use.
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.
H-25C Instruction Manual BACHARACH Instruction 3015-0216 27
H-25C Instruction Manual 3.1 Auto Calibration This auto calibration procedure can be used only if the instrument is equipped with the auto calibration option. Auto calibration is not possible when the measurement mode is set to B-type; always set the mode to A-type for auto calibration. 3.1.1 Setting the Switches Auto calibrations are performed with the " CAL " switch in the setup area set to the AUTO " position. Re-setting of " GAS " and " UNIT " switches is not necessary.
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. Disconnect the probe from the “CAL PORT”, and let it such in clean air.
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. Take appropriate action for the displayed fail code.
H-25C Instruction Manual 3.2 Manual Calibration Use the manual calibration method ff the instrument is not equipped with the auto calibration option. Manual calibration is possible in both A-type and B-type measurement modes. Note : An LS - 20B Leak Standard is required for manual calibration. 3.2.1 Setting the Switches Manual calibration is done in manual calibration mode. Set the " CAL " switch in the setup area to the " MANUAL " position.
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. The two alarm codes are as follows; take appropriate action depending on the alarm code displayed.
H-25C Instruction Manual 4. Measurement Operations This chapter explains how the H-25C works, and how to detect leaks with it. Note that before doing any of the operations described here, you must first complete the operations described in Section 2 (switch setup, etc.) to prepare the H - 2 5C for use. 4.1 Choosing a Location for the H-25C, and Getting Ready to Start Measurement 4.1.
H-25C Instruction Manual (3) 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. (See Figure 4.1.) Note: See Subsection 2.2.4 regarding the state of the contacts when the alarm contact signal is output.
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. Under normal conditions, the instrument will suck in a bout 4.5 ml/s of measurement gas from the probe. If the intake flow remains below about one quarter of this value for about 30 seconds, " AIR FLOW" will be displayed. If "AIR FLOW" is displayed, replace the probe filter.
H-25C Instruction Manual 4.2 Measurement 4.2.1 Measurement Modes The H-25C has two main measurement modes, A-type and B-type. Use the MODE switch to select the mode to be used (see Subsection 2.2.5). A-type mode is used if there is very little unwanted gas in the surrounding atmosphere and its concentration is settled, while B-type mode is used if there is a relatively high proportion of unwanted gas in the atmosphere and its concentration fluctuates.
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 " auto-zero " function acts to keep the indication at 0%.
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.
H-25C Instruction Manual 4.2.4 Leak Rate Measurement in B -type Mode To measure how much freon gas is leaking from a leak you have found, use auto-zero hold mode. The instrument goes into this mode when you hold the probe switch depressed. To measure the leak rate, you basically just hold the probe tip near the site of the leak (within 1 to 5 mm). Note, however, that in practice some differences in technique may be required, depending on various conditions.
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. Use pass/fail mode during this measurement.
H-25C Instruction Manual 4.2.7 • " 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" displayed). Sensor performance has deteriorated. (See Section 5.4 for corrective action.
H-25C Instruction Manual 4.3 R-12 Leak Detection The leak detector sensor for measuring R-134a requires a much greater sensitivity than for measuring R-12. Since the H-25C has a very sensitive sensor, it generates a very large output for R12. 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.
H-25C Instruction Manual 5. 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. Note that you should always turn the power switch OFF before starting any maintenance work. 5.
H-25C Instruction Manual 5.2 Replacing the Activated Charcoal Filter The measured gas going to the sensor is split into two a by a manifold, one stream being introduced with no treatment, the other being introduced after being passed through the activated charcoal filter to convert it to clean, pure air.
H-25C Instruction Manual (6) 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. (see figure 5.4) (c) Push down the whole filter until it is lower than the top edge of the case.
H-25C Instruction Manual 5.3 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 tank with R - 134a by the following procedure.
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. Then, waiting about one minute between repetitions, very slightly open the tank valve again for about 5.seconds, and repeat this action two or three times.
H-25C Instruction Manual (4) Return the " HEATER " variable resistor adjustment shaft to its starting position. First, turn it counterclockwise until you reach the limit of rotation, then turn it back clockwise 12 full turns. (5) Adjust the sensor sensitivity so that the bar graph indicates a value between 80 and 110% (see Subsection 3.1.3). 5.
H-25C Instruction Manual 6. TROUBLESHOOTING This chapter explains how to identify and take corrective action for certain types of malfunctions. If you find that the malfunction is due to actual failure of the instrument hardware, contact your Bacharach representative for service. Such repairs can be made only by an authorized Bacharach service center. 6.1 Improper Use Leading to Hardware Failure Improper use that can cause hardware failures must be absolutely avoided. Subsections 6.1.1 and 6.1.
H-25C Instruction Manual 6.2 Possible Causes of Malfunctions, and What to Do If They Occur Table 6.1 lists the most common malfunctions (symptoms). Subsections 6.2.1 through 6.2.10 show what can cause these symptoms, and what to do if they occur. When it Happened When power applied During measurement During calibration 6.2.
H-25C Instruction Manual (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). 6.2.4 Measured Value is Too High The three most likely causes are: (1) Not properly calibrated. Re-calibrate. (2) Activated charcoal filter has reached end of life.
H-25C Instruction Manual [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. Replace with new sensor. (See Section 5-4) (4) Calibration gas (liquid) in tank completely used up.
H-25C Instruction Manual [Reference] Facilities for Ridding the Atmosphere of Unwanted 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. 1.
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. (1) The air flow inside the facility cannot cause negative pressure.
H-25C Instruction Manual Customer Maintenance Parts List Item 1 2 3 4 5 6 7 8 9 10 11 12 Part No. 3015-1113 3015-4181 3015-1134 3015-2753 3015-1209 3015-1310 3015-2363 3015-2398 3015-2418 3015-1630 3015-0807 3015-2552 3015-2556 3015-2560 Instruction 3015-0216 Qty. 1 1 1 2 1 1 1 1 1 1 1 1 Description Pump Assembly Regulator Assembly Regulator O-Ring Flow Sensor Assembly Fun Assembly Activated-charcoal Filter Sheet (filter) Activated-charcoal Pack (5 pcs) Fuse (3.
H-25C Instruction Manual Item 1 2 3 4 5 6 7 8 Instruction 3015-0216 Part No. 3015-1200 3015-2668 3015-2672 3015-2676 3015-0947 3015-1545 3015-2096 3015-2102 3015-2108 3015-2114 3015-1194 Qty. 1 1 1 1 1 1 1 1 Description Tank Assembly w/freon O-Ring O-Ring O-Ring O-Ring Printed-circuit Assembly Printed-circuit Assembly (For 100/115V power) (For 100/115V power. With output signal) (For 120/240V or 110/220 V power) (For 120/240V or 110/220V power.
H-25C Instruction Manual Sales / Service Centers U.S.A. Bacharach Sales/Service Center - California 7281 Garden Grove Blvd., Suite H Garden Grove, CA 92841 Tel.: 714-895-0050 Fax: 714-895-7950 E-mail: CALSERVICE@bacharach-inc.com CANADA Bacharach of Canada Sales/Service Center 250 Shields Court, Unit #3 Markham, Ontario L3R 9W7 CANADA Tel.: 905-470-8985 Fax: 905-470-8963 Toll Free in Canada: 800-328-5217 E-mail: bachcan@idirect.
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