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5.2.8 Electric Contacting pressure gauge

1. Connection

Connect the calibrator and the electric contacting pressure gauge as shown in Figure 31;

Figure 31 Calibration of the electric contacting pressure gauge

2. New task

Select the “Electric contacting pressure gauge” icon

in the test type list and input the information of the calibrated

Содержание 762

Страница 1: ...762 Automated Hydraulic Pressure Calibrator...

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Страница 3: ...Additel 762 Automated Hydraulic Pressure Calibrator User Manual Please download the latest version from www additel com Version 2301V01 Additel Corporation...

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Страница 5: ...ns for the ADT762 Automated Hydraulic Pressure Calibrator To ensure correct operation and safety please follow the instructions in this manual Additel Corporation reserves the right to change the cont...

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Страница 7: ...eatures 3 1 3 Pressure Specifications 5 1 4 Other Specifications 7 2 Installation 11 2 1 Features 11 2 1 1 Basic structure 11 2 1 2 Electrical and signal port 14 2 1 3 Keypad 15 2 1 4 Liquid port 16 2...

Страница 8: ...eration 20 2 3 5 Powering off the unit 20 3 Display and Operation 21 3 1 Home screen 21 3 1 1 Status bar 22 3 1 2 Module function display area 24 3 1 3 Main interface keypad operation 24 3 2 Pressure...

Страница 9: ...ical applications on main page 51 3 6 1 Pressure gauge calibration 51 3 6 2 Pressure transmitter Calibration 53 3 6 3 HART transmitter calibration 55 3 6 4 Pressure switch calibration 56 3 6 5 I P con...

Страница 10: ...ical measurement 67 4 4 2 Auto tune 68 4 4 3 Calibration of the pressure source module 69 4 4 4 Calibration of the pressure module 69 4 4 5 Calibration Expiration Reminder 71 4 5 Services 71 4 5 1 Fir...

Страница 11: ...ct information 78 4 9 1 Host information 79 4 9 2 Control board information 79 4 9 3 Electrical measurement board information 79 4 9 4 Electrical source board information 79 4 9 5 Wireless module info...

Страница 12: ...85 5 2 1 Dial pressure gauge 86 5 2 2 Digital pressure gauge 90 5 2 3 Pressure transmitter 90 5 2 4 Pressure Transducer 92 5 2 5 Pressure switch 95 5 2 6 I P converter 97 5 2 7 Signal isolator 99 5 2...

Страница 13: ...3 8 System maintenance 115 8 1 Device information view 115 8 2 Diagnostic information 115 8 3 Check the sealing performance of the calibrator 115 8 4 Maintenance 116 8 4 1 Liquid reservoir 116 8 4 2 L...

Страница 14: ...ngle port 25 Figure 8 External pressure control connection with ADT107 manifold 26 Figure 9 Current measurement 32 Figure 10 Voltage measurement 33 Figure 11 Mechanical Switch 36 Figure 12 NPN Switch...

Страница 15: ...5 Calibration of a pressure switch 57 Figure 26 Calibration of an I P converter 58 Figure 27 Auto tune connection 69 Figure 28 Prepare for liquid replacement when vented 75 Figure 29 Calibration of th...

Страница 16: ...ions 9 Table 6 Basic structure 11 Table 7 Electrical and signal port 14 Table 8 Keypad function 15 Table 9 Auto step settings 28 Table 10 Scaling parameters 34 Table 11 Filtering parameters 34 Table 1...

Страница 17: ...able 27 Task mode pressure transmitter information 91 Table 28 Task mode pressure transducer information 94 Table 29 Task mode pressure switch information 95 Table 30 Task mode I P converter informati...

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Страница 19: ...er Please follow proper recycling procedures when discarding the battery To prevent user from injury be sure to use this product in accordance with the user manual To prevent possible fire electric sh...

Страница 20: ...d for the ADT762 Charge the battery as soon as the battery symbol indicates If the calibrator is not working properly turn it off remove the battery and contact Additel Do not remove the battery while...

Страница 21: ...e With fully automated support for calibration of pressure transmitters switches dial and digital gauges and sensors including HART PROFIBUS devices in conjunction with a fully integrated task feature...

Страница 22: ...storing results locally The Additel 762 can support up to 1000 documented tasks which can be stored and recalled at any time to help save time and money 4 Easy Maintenance Check the medium level thro...

Страница 23: ...i 0 02 FS 0 3 000 psi 0 01 FS 0 3 000 psi 0 02 FS Maximum External Load Capacity Max 80 ml 700 Bar 50 ml recommend Reservoir Max 350 ml built in filter Control Stability 1 0 005 FS from 100 to 10 000...

Страница 24: ...T161 01 GPXX for 0 01 FS 1 000 70 0 01 FS Gauge G L 1 500 100 0 01 FS Gauge G L 2 000 140 0 01 FS Gauge G L 3 000 200 0 01 FS Gauge G L 5 000 350 0 01 FS Gauge G L 10 000 700 0 01 FS Gauge G L ADT161...

Страница 25: ...Specification Details Stability 0 005 FS customizable External module See Table 2 Pressure type Gauge pressure Medium Diethylhexyl sebacate water medium 762W Maximum external load volume Max 80 ml 70...

Страница 26: ...8 RD 320 V 30 to 30 V 100 V 0 008 RD 600 V Loop Power Source 24 V N A 1 V 50 mA Max Loading mA Source 0 to 2 5 mA or 2 5 to 25 mA 0 2 5 mA 0 05 A 0 25 mA 0 5 A 0 25 mA 0 5 A 0 2 5 mA 0 008 RD 0 2 A 0...

Страница 27: ...800 x 480 color Enclosure IP Rating IP31 Power Dedicated lithium battery or power adapter Battery Rechargeable Li Ion battery typically 12 hours of operation less than 5 hours recharge Weight 28 lbs...

Страница 28: ...Spanish Portuguese Chinese Japanese and Russian Pump Life 1 000 000 cycles Environmental Specifications Operating temperature 32 F to 122 F 0 C to 50 C Storage temperature 20 C to 60 C 4 F to 120 F H...

Страница 29: ...11 2 Installation 2 1 Features 2 1 1 Basic structure Figure 1 Basic structure...

Страница 30: ...ssure module ports 4 On Off 5 Shortcut keys 6 Navigation keys 7 Numeric Keypad 8 Output port 9 Hanging strap 10 Block 11 Zeroing return manifold communication port 12 Display assembly clamp 13 Medium...

Страница 31: ...13 17 USB slave port 18 Power supply 19 USB master port 20 Head correction reference line 21 Battery...

Страница 32: ...trical and signal port Table 7 Electrical and signal port Port Description Current Voltage Switch measurement and HART Profibus PA bus communication Red is positive Black is negative Current Voltage a...

Страница 33: ...e module DC27V Power adapter connection port LAN Ethernet port USB A USB master for flash drive connection USB B USB slave for computer connection Item Keypad Description 1 On Off Key Power 2 Shortcut...

Страница 34: ...id level of the liquid storage tank 2 2 Initial preparation 2 2 1 Battery installation As shown in Figure 3 install the battery after taking out the battery insert the battery in the direction shown i...

Страница 35: ...remove the battery reverse the operation and push the battery manually lock make the battery lock unlocked and remove the battery as shown in Figure be careful that the battery falls during this proce...

Страница 36: ...18 Figure 4 Connect to DUT 2 2 3 Open the display Push the lock on the cover to the right to open the screen to a suitable angle...

Страница 37: ...rator is charging the screen go into the charging display press to turn it on 2 3 2 Setting the system date and time Refer to section 4 6 1 to set date and time 2 3 3 Generating a pressure 1 Fill the...

Страница 38: ...t a pressure within the range as the target value and the calibrator will control and output the pressure to the target value pressure 2 3 4 Display and operation Touchscreen display makes operation e...

Страница 39: ...ected please disconnect the adaptor at first If the battery is installed refer to above step 3 Display and Operation 3 1 Home screen The home screen contains top status bar and modules functional area...

Страница 40: ...tes cloud service is enabled but has lost connection Snapshot Icon indicates snapshot function is operating 2 Module function display hidden operation area Modules can be displayed or hidden by clicki...

Страница 41: ...ule B display hidden Icon will be displayed when pressure module B is connected 3 Navigation function area Control center Click icon to enter the control center The control center has many functions i...

Страница 42: ...3 3 electrical measurement Electrical signal output area see section 3 4 electrical signal output External pressure module A B areas see section 3 5 3 1 3 Main interface keypad operation When the dis...

Страница 43: ...to the Figure 4 to connect the UUTs 2 If wants to use external modules or need a ADT107 manifold Optional and please follow the below steps to make the connection 1 Remove the single port as shown in...

Страница 44: ...26 Take out the whole assembly arrow 2 Make connections with the ADT107 manifold and external modules as shown in figure 8 Figure 8 External pressure control connection with ADT107 manifold...

Страница 45: ...ternal control pressure is enabled if an external pressure module is connected there will be corresponding module A and B options 3 Input target value Pressure output area touch screen to enter value...

Страница 46: ...ling after the target pressure value is achieved On the status of vent or measure click or control button on the screen to start controlling to the target pressure Press or click vent and measure butt...

Страница 47: ...e 0 3600 seconds The time is pressure stable at each step Step quantity 2 17 The number of steps Range Range will be based on the largest range of internal module Setting auto step output range Point...

Страница 48: ...ximum range the system will immediately vent and prompt overpressure protection 3 2 3 Pressure unit When the pressure output pressure measurement or external pressure module is selected click the pres...

Страница 49: ...ent and voltages measurements Do not apply current voltage outside the calibrator s range Short circuit zeroing is allowed If the measured value exceeds the present range it will turn red and give an...

Страница 50: ...32 Figure 9 Current measurement...

Страница 51: ...tional operation 1 Zeroing Zero the measurement to eliminate the zero drift The allowable zeroing range is 0 1 FS For automatic mode it will use the smallest range to calculate 30 30 V calculate by 5...

Страница 52: ...e Description Transfer function Linear square root square Type of the conversion function of the scaled value Input range 0 100 Percentage of the input range of scaling Unit Depend on the electrical m...

Страница 53: ...nic switch 2 Connection If mechanical switch is selected connect the electric circuit as shown in Figure 11 If NPN electronic switch is selected connect the electric circuit as shown in Figure 12 If P...

Страница 54: ...N Switch Figure 13 PNP Switch 3 Action value The switch action values are recorded only when the output item is pressure Only a pair of action values is recorded including the switch state on to off o...

Страница 55: ...trol system you must separate the HART device from the control system before connecting the calibrator to HART device 1 Search and connection Under the main operation interface open the electrical mea...

Страница 56: ...nce Figure 16 HART internal power external resistance Figure 17 HART external power internal resistance After the power supply configuration is selected you will enter the search interface Start searc...

Страница 57: ...al measurement is switched to other measurement mode e g current measurement it will exit HART connection Meanwhile the HART measurement icon in the status bar will change to a corresponding icon e g...

Страница 58: ...ormation Label Support input of letters numbers and symbols no longer than 8 characters Date It can be modified to any date supported by the transmitter Information Support input of letters numbers an...

Страница 59: ...be modified to any unit supported by the transmitter During modification the upper and lower limits are displayed through conversion PV lower range limit Not exceed the lower sensor limit PV upper ran...

Страница 60: ...check its input range If the present setting is cancelled or setup fails the present item will be resumed 5 Maintenance 1 Current loop test Click and select Diagnosis Service to enter current loop te...

Страница 61: ...r trim please refer to the user manual of transmitter 1 Lower trim Support setting the PV unit and trim point value You can select two pressurization methods internal and external pressurization Press...

Страница 62: ...command After completed successfully the upper and lower trim values will restore factory settings 3 3 4 PROFIBUS PA communication The calibrator supports PROFIBUS PA bus communication It can set and...

Страница 63: ...tion mode please refer to Figure 14 in Para 3 3 3 Click the icon to start searching and click the icon to stop searching From the searched PA device list click a PA device to be connected After connec...

Страница 64: ...m part in the user manual of PA transmitter 3 4 Electrical output You can click a corresponding electrical output icon in the module display hide operation area on the top status bar to display hide t...

Страница 65: ...able loop power Power will be supplied as soon as loop power is enabled 4 Input of the target set value When the voltage output module is hidden press the key to enter the setup interface of electrica...

Страница 66: ...or custom Set the mode of automation step Cycle interval 0 3600 sec Standing time between the end of each cycle and the start of next cycle Dwell time 0 3600 sec Standing time after the present elect...

Страница 67: ...5 Ramp parameters 3 5 External pressure module 1 Connection Connect the external pressure module as shown in Figure 19 Subject Valid value Description Range Do not exceed the electrical output range S...

Страница 68: ...of the external pressure module When the pressure module is connected properly the status bar will display the online icon of pressure module The calibrator supports two external pressure modules A an...

Страница 69: ...Press to enter the function menu Select Stability to set the stability time and stability Zeroing is allowed Select Module Information to view related information of the external pressure module Selec...

Страница 70: ...e gauge Figure 21 Connect a digital pressure gauge 3 Manually set or use the step function see Para 3 2 1 Auto step and manual step of pressure output to output the pressure of each calibration point...

Страница 71: ...m of main operation interface to Current or voltage measurement depend on the output signal of the transmitter If the current type 2 wire pressure transmitter needs loop power supply you shall enable...

Страница 72: ...54 Figure 22 Calibration of a 2 wire pressure transmitter Figure 23 Calibration of a 3 wire pressure transmitter...

Страница 73: ...f each calibration point 4 When the pressure of each calibration point becomes stable and is displayed in green record the output value of the transmitter at each point or use the snapshot feature 3 6...

Страница 74: ...2 1 Auto step and manual step of pressure output to output the pressure of each calibration point 7 When the pressure of each calibration point becomes stable and is displayed in green record the out...

Страница 75: ...w rate to a lower value which will reduce the lag time Separately use the upper and lower range limits of switch as the target value for pressure control until the switch acts Then capture and display...

Страница 76: ...te High pressure or low pressure range depends on the range of the I P converter The output pressure of I P converter can be measured by using an external pressure module 2 Connection Connect as shown...

Страница 77: ...enter the system setup interface Or click on the screen then a main menu will pop up Select Set up on the main menu to enter the system setup interface System setup includes control setting communica...

Страница 78: ...ure stability 2 Meet the condition 1 continuously and reach the pressure stabilization time 5 Automatic zero Can be enabled or disabled If enabled the calibrator will automatically perform pressure ze...

Страница 79: ...bled this function is invalid The setting will be stored by the calibrator and still effective after reboot If enabled the target value of pressure control of the calibrator is limited by this conditi...

Страница 80: ...ot be modified Click the button at the lower right corner of screen confirms and saves the settings 4 2 2 Wireless communication The calibrator is connected via a wireless network Subject Valid value...

Страница 81: ...effect immediately with no need for confirmation Click at the upper right corner of screen to return to the previous menu Subject Valid value Description WLAN Open Close Open or Close the WLAN Advanc...

Страница 82: ...e Description Bluetooth state Enable disable Enable or disable the Bluetooth function Bluetooth name Support Chinese characters letters numbers or symbols Set the Bluetooth name of calibrator Physical...

Страница 83: ...e auto backlight time auto sleep time and auto shutdown time 1 Backlight time In case there is no key and serial port command operations within a set time the backlight brightness will be automaticall...

Страница 84: ...automatically shut down There are 5 types of auto power off settings never 5 min 15 min 30 min 1 hour and 2 hours If connected to a power adapter the calibrator does not support auto power off During...

Страница 85: ...ill be deleted permanently The calibrator provides a calibration due date warning 4 4 1 Calibration of electrical measurement 1 Set the calibration points Several calibration points are provided by de...

Страница 86: ...t immediately 3 Restore the factory calibration data Click on the right side of screen to restore the factory data 4 4 2 Auto tune Auto tune can optimize controller parameters which have reduced after...

Страница 87: ...librator to correct the pressure drift caused by the long term operation of the internal sensor and the pressure outlet needs to be closed during execution 4 4 4 Calibration of the pressure module 1 H...

Страница 88: ...he calibration point can be changed please make sure that the input calibration point set value is within the range of the internal pressure module and ensure that the first point is smaller than the...

Страница 89: ...ta 4 4 5 Calibration Expiration Reminder You can set the calibration expiration date of each module and set whether to turn on the expiration reminder function of each module The default calibration p...

Страница 90: ...test firmware version or start automatic upgrade 2 Remote upgrade shall ensure that the calibrator can be connected to the Internet through LAN Ethernet or Wi Fi 4 5 2 Maintenance Maintenance needs in...

Страница 91: ...e this function Restores the user settings to defaults and clear snapshot and task files Inputs the password to enter the factory reset interface A prompt box will pop up to ask whether you confirm it...

Страница 92: ...possible it s better to put the output port and UUT upside down to obtain a more significant gas purging effect 2 Operating procedures After entering the application enter the maximum range of the un...

Страница 93: ...tton to drain click button to stop draining Figure 28 Prepare for liquid replacement when vented 4 5 7 Piston maintenance 1 Function introduction This function is a preliminary treatment when the pist...

Страница 94: ...e device provides multi language interfaces You can select a suitable language interface through this menu When selected the language interface will take effect after rebooting the device 4 6 3 Sound...

Страница 95: ...s enabled the top status bar of main interface will display a cloud service state icon or respectively indicating that connection to the cloud service succeeded or failed Subject Valid value Descripti...

Страница 96: ...can export data in the format of CSV through a USB flash drive or PC software Users can delete data in batches 4 9 Product information The product information includes calibrator host information con...

Страница 97: ...rs of internal pressure module include Model range S N and calibration date 4 9 3 Electrical measurement board information Includes the software version and hardware version of electrical measurement...

Страница 98: ...rs 4 9 7 HART communicator information Includes the DD library version etc 5 Documenting Tests 5 1 Quick test Click the main menu icon on the main interface and then select the icon to enter the quick...

Страница 99: ...time and then click the OK button to start the test The test data will be manually entered at each point of the test Click the next button to skip the current test point and enter the next test point...

Страница 100: ...er of cycles the stroke mode the number of readings the reading interval and the dwell time and then click the OK button to start the test Selecting manual perform and then start the test After the se...

Страница 101: ...to switch between the graph display or table display Pressure switch action When the internal pressure module is used as the reference it will be automatically run the test When the external pressure...

Страница 102: ...in Figure 29 2 Start the test Same as Para 5 1 2 Pressure transmitter 3 Save the result Same as Para 5 1 2 Pressure transmitter 5 1 5 I P converter Select the I P converter icon in the test type list...

Страница 103: ...he calibrator provides task functions which automate preset calibration routines and collect record and save test data Enter the task interface Click and select the task in the menu Task list interfac...

Страница 104: ...Model Letter numeral symbol Model of the pressure gauge Pressure type Gauge pressure absolute pressure differential pressure Pressure type of the pressure gauge Range Depends on the pressure gauge Ran...

Страница 105: ...tically set the default calibration point based on the range of the calibrated instrument and the number of the calibration points Any point can be manually selected to be changed to a different point...

Страница 106: ...point is reached and stable The number on the upper left pressure output window turns green and there is a sound enter the measurement value for the dial pressure gauge Click the Enter key on the key...

Страница 107: ...and the following information can be entered Table 27 Task Save After saving return to the task interface Subject Valid value Description Operator Letter numeral symbol Calibration task operator infor...

Страница 108: ...uge are 0 025 0 05 0 1 0 16 0 25 0 4 1 1 6 2 5 4 and custom 3 For the contents of task setting refer to Para 5 2 1 Task setting for calibration of the dial pressure gauge There are no settings for tap...

Страница 109: ...absolute pressure differential pressure Pressure type of the pressure transmitter Input Depends on the pressure transmitter Pressure range of the pressure transmitter Output Analog signal 4 20 mA 0 10...

Страница 110: ...tton at the bottom right In the pressure transmitter task mode the user can choose the automatic execution mode or the manual execution mode After the entire calibration process is completed it will a...

Страница 111: ...93 in Figure 29 2 New task Select the pressure transducer icon in the test type list and input the information of the pressure transducer Figure 29 Calibration of the pressure transducer...

Страница 112: ...put Depends on the pressure sensor Pressure range of the pressure transducer Output 4 20 mA 0 20 mA 1 5 V 0 10 V 0 100 mV 0 200 mV and custom Electric signal output range of current voltage and pressu...

Страница 113: ...before starting 5 For the contents of task end refer to Para 5 2 1 task end for calibration of the dial pressure gauge 5 2 5 Pressure switch 1 Connection Connect the calibrator and the pressure switc...

Страница 114: ...5 1 1 5 2 2 5 4 and custom Precision of the pressure switch The numeral input in the custom option is the precision level of the pressure switch Set point Depends on the range of the pressure switch O...

Страница 115: ...re module is selected as the standard the pressure switch test method is based on slew rate in the control settings and the rate is gradually attenuated following the change of state for the switch Wh...

Страница 116: ...ure absolute pressure differential pressure Pressure type of the I P converter Input 4 20 mA 4 12 mA 12 20 mA and custom Input current range of the I converter Output Depends on the I P converter Outp...

Страница 117: ...lected for the calibrated output standard If the internal pressure range is selected the pressure output range of the calibrated converter shall not exceed the internal range of the calibrator If the...

Страница 118: ...n in the test type list and input the information of the calibrated signal isolator Table 32 Task mode signal isolator information Subject Valid value Description Name Letter numeral symbol Name of th...

Страница 119: ...to Para 5 2 1 Task end for calibration of the dial pressure gauge Model Letter numeral symbol Model of the signal isolator Accuracy 0 05 0 1 0 2 0 5 1 1 5 2 2 5 and custom Precision of the signal isol...

Страница 120: ...calibrator and the electric contacting pressure gauge as shown in Figure 31 Figure 31 Calibration of the electric contacting pressure gauge 2 New task Select the Electric contacting pressure gauge ic...

Страница 121: ...symbol Model of the contact pressure gauge Pressure type Gauge pressure absolute pressure differential pressure Pressure type of the pressure sensor Range Depends on the pressure gauge Range and unit...

Страница 122: ...tically set the default calibration points based on the range of the calibrated instrument and the number of the calibration points The value and number of points can be adjusted as necessary Cycle nu...

Страница 123: ...Para 5 2 1 Task end for calibration of the dial pressure gauge 5 2 9 Valve opening gauge 1 Connection Connect the calibrator and the valve opening gauge as shown in Figure 32 2 New task Select the val...

Страница 124: ...nding on the valve opening gauge Pressure range of the valve opening gauge Electrical output depending on the valve opening gauge Current range of the valve opening gauge Output 0 100 360 360 Output r...

Страница 125: ...n 1 Click the menu in the upper right on the main interface to select the application and then enter the pressure unit converter 2 Supports conversion between multiple pressure units 6 2 Pressure leak...

Страница 126: ...s an external controllable voltage module online the external voltage control module is selected and the internal control voltage is turned on the external control voltage set point can be set Setpoin...

Страница 127: ...ng time Record the pressure at the end of the waiting time as the starting pressure Start the test count down the test time and start to calculate the real time leakage real time leakage initial press...

Страница 128: ...nd the final leak volume initial pressure ending pressure The whole process will be shown in stages in the leak detection curve diagram at the bottom of the screen 4 Check After entering the pressure...

Страница 129: ...eration to add multiple channels Click the channel item that has been set you can set it to close and switch the color Set the recording interval recording time and recording points information Table...

Страница 130: ...settings and record information settings Click You can view the data list to display the recording time and detailed values of each point in the data record 3 Export and delete Enter the main interfac...

Страница 131: ...tions of the HART device before using the communicator function Note During communication with a HART device the calibrator acts as a master station all the time To avoid damaging the control system y...

Страница 132: ...essure modules HART indications and the electrical measurement indications Click and on the right side of the screen to view the communication status and the device status respectively After entering...

Страница 133: ...heck the sealing performance of the calibrator The sealing performance of the calibrator has a crucial impact on its control speed and control pressure stability Slow pressurization speed long stabili...

Страница 134: ...Phillips screwdriver to rotate the bolt counterclockwise and stop when the nut starts to rise as shown in the figure 2 Remove the liquid reservoir cover back as shown in the figure 3 Pull out the liqu...

Страница 135: ...njection filters respectively for cleaning or replacement as shown in position in the figure The liquid line filters and liquid injection filters have different sizes and cannot be mixed Clean or repl...

Страница 136: ...peration 2 Rotate the vent valve counterclockwise as shown in remove it and keep the filter as shown in 3 Put the small metal funnel into the filter screen in the liquid injection port as shown in the...

Страница 137: ...hutdown 8 5 Replace the output filter and O ring Figure 36 Maintenance of pressure outlet The maintenance of the position of the pressure output port is shown in the figure above 1 Rotate the hexagona...

Страница 138: ...wn in the figure 6 Rotate the hexagonal nut clockwise until it is tightened as shown in the figure 7 Maintenance interval 3 to 6 months time or according to usage Note Make sure to do this with the ca...

Страница 139: ...121...

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