TOA-DKK OBM-100H Instruction Manual

Dissolved oxygen analyzer/transmitter

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No. OBM-IB45802E

ANALYZER/TRANSMITTER

Please keep this instruction manual close at hand of the persons who are in charge of

the operation of this product.

Before operating this product, please read this instruction manual carefully for its

correct handling.

DISSOLVED OXYGEN

MODEL OBM-100H

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Summary of Contents for TOA-DKK OBM-100H

Page 1 DISSOLVED OXYGEN ANALYZER/TRANSMITTER MODEL OBM-100H Please keep this instruction manual close at hand of the persons who are in charge of the operation of this product. Before operating this product, please read this instruction manual carefully for its correct handling.
Page 2 Introduction Introduction (a) Thank you for your purchase of our product. The Model: OBM-100H dissolved oxygent Analyzer/Transmitter (hereafter called the transmitter or the product) is an indicating transmitter in a measurement system to measure dissolved oxygen (DO) in solution and is installed in various processes.
Page 3 Model: OBM-100H Introduction • Electrical interference such as noise in the vicinity or improper grounding. • Other unpredictable phenomena (h) Since important items are described in “Safety Information”, read the contents carefully. (i) The product should be handled by persons who have received proper training. In addition, for...
Page 4 Model: OBM-100H Safety Information Safety Information (1) Meaning of markings Meaning of symbols such as the ones used in notations of warning in the instruction manual is described below. In addition, the alert symbol ( : General caution symbol) used on a product label, etc.
Page 5 Model: OBM-100H Safety Information Disassembly and Modification Do not disassemble or modify the sections of the product that are not described in the instruction manual. The product can be damaged. Warning Label Lost If any warning label affixed to this product becomes too difficult to read or lost, please order a new one through your local sales agent or our sales office and affix it to its original position.
Page 6 Model: OBM-100H Product Warranty Product Warranty (1) Scope DKK-TOA Corporation (hereafter referred to as “our company”) warrants that if a product manufactured by our company proves to be defective in material or workmanship, our company will provide the customer, without charge, the parts necessary to remedy any such defect for a period of one (1) year.
Page 7 Model: OBM-100H Reading Guide Reading Guide Refer to the necessary sections of this instruction manual depending on your purposes such as understanding the outline of this product or starting the product as shown below. The numbers in circles indicate sections to be referred to in sequential order.
Page 8 Model: OBM-100H Table of Contents Table of Contents ●Introduction ················································································································1 ●Safety Information ·······························································································3 (1) Meaning of markings ⋅⋅⋅⋅ 3 (2) Safety compliance items ⋅⋅⋅⋅ 3 (3) Notes on use of the instruction manual ⋅⋅⋅⋅ 4 ●Product Warranty ·································································································5 ●Reading Guide ·······································································································6...
Page 9 Model: OBM-100H Table of Contents (3) Description of calibration related screens ⋅⋅⋅⋅ 41 (4) DO value adjustment setting ⋅⋅⋅⋅ 42 (5) Temperature shift setting ⋅⋅⋅⋅ 43 (6) Setting the atmospheric pressure shift ⋅⋅⋅⋅ 44 (7) Setting the measuring range ⋅⋅⋅⋅ 45 (8) Setting the zero calibration signal value and span calibration signal value ⋅⋅⋅⋅...
Page 10 Model: OBM-100H Table of Contents (1) Connection diagram ⋅⋅⋅⋅ 79 (2) Electrode signal input terminals ⋅⋅⋅⋅ 80 (3) Transmission output terminal ⋅⋅⋅⋅ 80 (4) Power input terminals ⋅⋅⋅⋅ 80 (5) Ground terminal ⋅⋅⋅⋅ 81 (6) Alarm signal output terminals ⋅⋅⋅⋅ 81 (7) Maintenance-in-progress signal output terminals ⋅⋅⋅⋅...
Page 11 Model: OBM-100H 1. Names of Each Part 1. Names of Each Part (1) Names of main components Fixture Terminal board cover Control panel When RS-232C connector (option) is used, the shape of the terminal block cover differs partly. Main display (when all of the lights are indicated)
Page 12 Model: OBM-100H 1. Names of Each Part (2) Key and indicating functions Key function Operation key Function (notation in the text) • When pressed longer (3 seconds or more) in the measurement mode, the Initial Stand-by key Screen of the setting mode appears •...
Page 13 Model: OBM-100H 1. Names of Each Part (Continued from previous page) Operation key Function (notation in the text) • This key is used to change the screen in the setting mode or in the transmission Enter key adjustment mode. In addition, this key is used to confirm the entered number or symbol and change the screen to the next one at the same time.
Page 14 Model: OBM-100H 1. Names of Each Part (3) Operation screen map Power turned on (ON) [Measurement mode] Measured value screen group Alarm check screen group (To switch screen: (To switch screen: Alarm 1 set point check (-/L/H) screen DO measured value (DO) screen...
Page 15 Model: OBM-100H 1. Names of Each Part [ Setting mode ] Setting mode initial screen Alarm setting screen group (To switch screen: Press longer Alarm 1 on/off setting screen Alarm 1 high/low setting screen Alarm 1 set point setting (L/H) screen...
Page 16 Model: OBM-100H 2.1 Operation Start Procedure 2. Transmitter Operation and pH Calibration 2.1 Operation Start Procedure Follow the procedure below for operation. The measurement system including the transmitter goes into normal operating state. ① Check the installation condition. ⋅⋅⋅⋅⋅⋅ Check that necessary installation work is completed, which is described in 8.
Page 17 Model: OBM-100H 2.1 Operation Start Procedure Electric Shock Do not touch the terminal board while power is applied. Touching the terminals may cause electric shock. 【IMPORTANT】 • Power supply voltage is 90 to 264VAC. If a voltage higher than this range is applied to the transmitter, the transmitter may be damaged.
Page 18 Model: OBM-100H 2.1 Operation Start Procedure ⑦ Check other settings. ⋅⋅⋅⋅⋅⋅ Check the factory settings for items shown in the following table. 3.2(5) “Checking other setting values” • If necessary, change the settings. 3.3(8) “Setting the zero calibration signal value and span calibration signal value”...
Page 19 Model: OBM-100H 2.2 Calibration 2.2 Calibration (a) It is absolutely necessary for this transmitter to perform calibration before measurement using a standard solution and adjust the electrode characteristics and the indication of the transmitter. (b) Though the electrode characteristics changes due to dirt accumulation by sample water when measurement is continued for a long time, this effect can be eliminated by calibration.
Page 20 Model: OBM-100H 2.2 Calibration Sodium sulfite (5 to 10g) Beaker Ion-exchange water (100mL) Zero water Ion-exchange water (for cleaning) Preparing Zero Water ③ Remove the electrode. ⋅⋅⋅⋅⋅⋅ Close the control valve to stop the sample water and loosen the fixing nut to remove the electrode.
Page 21 Model: OBM-100H 2.2 Calibration Electrode Zero solution (Sodium sulfite solution) Immersing the Electrode in Zero Solution ⑥ Go to the calibration screen group. ⋅⋅⋅⋅⋅⋅ Press . Then the “Calibration select (AUTO etc.)” screen appears. • If DO value adjustment is set to On (on), the value on the main display changes to the value without DO value adjustment because the DO value adjustment is temporarily turned off when entered in the calibration screen group.
Page 22 Model: OBM-100H 2.2 Calibration (2) Electrical zero calibration This is the method to perform zero calibration simply by setting Off (oFF) inside the transmitter to the input signal sent from the electrode. In this method, the measured value becomes high about 0.1 to 0.2μg/L compared to the operation in 2.2(1) “Zero calibration using a solution”.
Page 23 Model: OBM-100H 2.2 Calibration (3) Span calibration using air In general, span calibration is performed in the air where calibration value is precise or using air saturated water. This transmitter, as a rule, uses air calibration. However, if a calibration location is near a heat source or under direct sunlight, it is recommended that you use air saturated water because the temperature in such a location easily becomes unstable.
Page 24 Model: OBM-100H 2.2 Calibration • If DO value adjustment is set to On (on), the value on the main display changes to the value without DO value adjustment because the DO value adjustment is temporarily turned off when entered in the calibration screen group.
Page 25 Model: OBM-100H 2.2 Calibration 10.23 Setting Mode Initial Screen ④ Remove the electrode. ⋅⋅⋅⋅⋅⋅ Close the control valve to stop the sample water and loosen the fixing nut to remove the electrode. 【IMPORTANT】 • The time to leave the electrode in the air must be within 30 minutes. This...
Page 26 Model: OBM-100H 2.2 Calibration 7.039 7.039 AUTO SPAN < Example of Zero/Span Auto Check Calibration > < Example of Span Calibration > Calibration Select Screen (AUTO etc.) ⑧ Start span calibration. ⋅⋅⋅⋅⋅⋅ After 10 to 20 minutes passes by, press •...
Page 27 Model: OBM-100H 2.3 Stopping the Operation 〔NOTE〕 • SAT (SAT.RATIO = Saturation ratio) ⋅⋅⋅⋅⋅⋅ This is the unit of dissolved oxygen with 100% when a solution is saturated with air and this unit can be used when saturated dissolved oxygen in pure water cannot be applied due to sample water compositions, etc.
Page 28 Model: OBM-100H 2.3 Stopping the Operation Electrode Diaphragm Rubber Cap Attaching a Rubber Cap To restart the operation, refer to 2.1 “Operation Start Procedure”. 〔NOTE〕 • For this transmitter, even if the operation is stopped, a voltage is still applied to the electrode by a lithium battery unless the electrode lead wires are removed.
Page 29 Model: OBM-100H 3.1 Modes and Switching Method 3. Modes of Operations 3.1 Modes and Switching Method (1) Checking the current mode (a) Screens to check or set various items are separated into the following 3 modes: • Measurement mode ⋅⋅⋅⋅⋅⋅ Provides the screens required for husual operation, such as the measured value screen group and measuring range display screen group.
Page 30 Model: OBM-100H 3.2 Measurement Mode Operation (c) Pressing longer in the setting mode returns the screen to the “DO measured value” screen of the measurement mode. (d) When the mode is switched to the setting mode, the transmission output (terminals 70 and 71) automatically changes to the type of output shown on the “Setting mode transmission output type...
Page 31 Model: OBM-100H 3.2 Measurement Mode Operation (a) The measurement mode is a basic mode and provides screens for checking measured values and setting values. When the power supply of the transmitter is turned on, this mode is selected. When the transmitter exits the setting mode or transmission adjustment mode, it returns to the measurement mode.
Page 32 Model: OBM-100H 3.2 Measurement Mode Operation (Continued from previous page) Screen name Screen display example Contents • Main display ⋅⋅⋅⋅ Present O ② ◎ O measured value screen measured μ value. 16.34 mg/L • Sub display ⋅⋅⋅⋅ O2 • The screen returns to “DO measured value (DO)”...
Page 33 Model: OBM-100H 3.2 Measurement Mode Operation (c) The screen of this group automatically returns to “DO measured value (DO)” screen 20 seconds after it is displayed. (d) The setting values of these screens can be changed in each relevant screen of the setting mode shown in 3.3 (2) “Alarm setting”.
Page 34 Model: OBM-100H 3.2 Measurement Mode Operation (4) Checking the measuring range (a) The measuring range display screen group contains the screens shown in the following table. Using these screens, you can check the measuring range low limit DO value (corresponds to 4mA output) and high limit DO value (corresponds to 20mA output).
Page 35 Model: OBM-100H 3.2 Measurement Mode Operation Sequence and Contents of Other Setting Values Check Screen Group Screen name Screen display example Contents (To switch screen: • Main display ⋅⋅⋅⋅ shows the zero ① ◎ Zero calibration signal μ value check screen correction value at the previous zero -.0002...
Page 36 Model: OBM-100H 3.2 Measurement Mode Operation (Continued from previous page) Screen name Screen display example Contents • Main display ⋅⋅⋅⋅ shows the currently set ◎ Calibration stability ⑥ μ check on/off screen on/off setting of stability check function mg/L for calibration.
Page 37 Model: OBM-100H 3.3 Setting Mode Operation 3.3 Setting Mode Operation (1) Setting mode screen groups (a) In the setting mode, various measurement conditions such as the measuring range are set. In each screen of this group, you can change the relevant setting value.
Page 38 Model: OBM-100H 3.3 Setting Mode Operation Alarm setting screen group 8.32 Press (To switch screen: longer “Setting Mode Initial” Screen “Alarm 1 Set Point On/Off Setting” Screen Press longer: Returns to “DO measured value” Adjust / Shift setting screen group screen.
Page 39 Model: OBM-100H 3.3 Setting Mode Operation (c) When the alarm function is On (valid), if the DO value exceeds the set-point, the contact signal of the corresponding alarm output terminal changes from “Open” to “Closed” state and if the DO measured value returns to within the set-points, the contact signal returns to the “Open”...
Page 40 Model: OBM-100H 3.3 Setting Mode Operation Procedure for Setting the Alarm settings Procedure and Display example Contents ① Select “Setting mode initial” screen. Press longer (3 seconds or more) in the ··························· measurement mode. • “ST-BY” lights. ② Select “Alarm 1 on/off setting” screen.
Page 41 Model: OBM-100H 3.3 Setting Mode Operation (Continued from previous page) Procedure and Display example Contents ⑥ Set the Alarm 1 dead band. Set a new dead band value of Alarm 1 on the main ············································· display and then press μ...
Page 42 Model: OBM-100H 3.3 Setting Mode Operation (Continued from previous page) Procedure and Display example Contents ⑩ Set the Alarm 2 dead band. Set a new dead band value of Alarm 2 on the main ············································· display and then press μ...
Page 43 Model: OBM-100H 3.3 Setting Mode Operation (Continued from previous page) Procedure and Display example Contents ② Select “Calibration select” screen. Press (not needed to press longer). ······························· • The transmitter enters the calibration screen group μ ST-BY and “Calibration select (AUTO etc.)” screen appears.
Page 44 Model: OBM-100H 3.3 Setting Mode Operation Procedure for Setting the DO Value Adjustment Procedure and Display example Contents ① Select “Setting node initial” screen. Press longer (3 seconds or more) in the ···························· measurement mode. • “ST-BY” lights. ② Select “DO value adjust on/off setting”...
Page 45 Model: OBM-100H 3.3 Setting Mode Operation (c) If On (valid) is set to “Manual temperature compensation on/off setting (M.TMP)” screen, the screens described above are not displayed. 3.3(14) “Setting the manual temperature compensation” Procedure for Setting the Temperature Shift Procedure and Display example Contents ①...
Page 46 Model: OBM-100H 3.3 Setting Mode Operation Procedure for Setting the Atmospheric Pressure Shift Procedure and Display example Contents ① Select “Setting mode initial” screen. Press longer (3 seconds or more) in the ··························· measurement mode. • “ST-BY” lights. ② Select “Atmospheric pressure shift on/off...
Page 47 Model: OBM-100H 3.3 Setting Mode Operation Procedure for Setting the Measuring Range Procedure and Display example Contents ① Select “Setting mode initial” screen. Press longer (3 seconds or more) in the ··························· measurement mode. • “ST-BY” lights. ② Select “DO measuring range unit setting”...
Page 48 Model: OBM-100H 3.3 Setting Mode Operation (Continued from previous page) Procedure and Display example Contents 1.0 to 3.0 (mg/L, setting unit 0.1, minimum setting μ ST-BY 1.0) 20.0 mg/L 3.1 to 20.0 (mg/L, setting unit 0.1, minimum setting RANGE 2.0) 20mA •...
Page 49 Model: OBM-100H 3.3 Setting Mode Operation (Continued from previous page) Procedure and Display example Contents ③ Change the zero calibration signal value. Display the desired zero calibration signal value on the ·················· main display and press • Main display ⋅⋅⋅⋅ Current zero calibration signal value ( μ...
Page 50 Model: OBM-100H 3.3 Setting Mode Operation (Continued from previous page) Procedure and Display example Contents ② Select “Burnout setting” screen. Press longer and then press repeatedly ··································· until “B.OUT” appears on the sub display. μ ST-BY • The transmitter enters the other setting screens group mg/L and “Burnout setting (B.OUT)”...
Page 51 Model: OBM-100H 3.3 Setting Mode Operation (Continued from previous page) Procedure and Display example Contents ② Select “Setting mode transmission output Press longer and press repeatedly until ················· type setting” screen. “S.OUT” appears on the sub display. • Goes to the other screen group and “Setting mode μ...
Page 52 Model: OBM-100H 3.3 Setting Mode Operation Procedure to Setting the Response Speed Procedure and Display example Contents ① Select the “Setting mode initial” screen. Press longer (3 seconds or more) in the ···················· measurement mode. • “ST-BY” lights. ② Select “Transmission response speed setting”...
Page 53 Model: OBM-100H 3.3 Setting Mode Operation (Continued from previous page) Procedure and Display example Contents ② Select “Calibration stability check setting” Press longer and then press several ··············· screen. times until “WAIT” setting appears on the sub display. • Goes to the other setting screen group and μ...
Page 54 Model: OBM-100H 3.3 Setting Mode Operation (Continued from previous page) Procedure and Display example Contents ③ Change the impress voltage. Display the desired impress voltage on the main ·········································· display and press • Main display ⋅⋅⋅⋅ Current impress voltage (mV) To increase/decrease number ⋅⋅⋅⋅...
Page 55 Model: OBM-100H 3.3 Setting Mode Operation (Continued from previous page) Procedure and Display example Contents ③ Set On/Off of the manual temperature Press to select either one necessary on the ························ compensation function. main display and press • Main display ⋅⋅⋅⋅ Currently set On/Off of the manual temperature compensation function on (on) ⋅⋅⋅⋅...
Page 56 Model: OBM-100H 3.3 Setting Mode Operation (Continued from previous page) Procedure and Display example Contents ③ Select “Atmospheric pressure correction to select either one necessary on the ··················· on/off setting” screen. main display and then press • Main display ⋅⋅⋅⋅ shows the currently set on/off setting for atmospheric pressure correction.
Page 57 Model: OBM-100H 3.4 Transmission Adjustment Mode Operation 3.4 Transmission Adjustment Mode Operation (a) This function is mainly used for technical service. Do not operate this function unless otherwise required. 【IMPORTANT】 • If these setting values are changed when not necessary, correct measured values become difficult to obtain.
Page 58 Model: OBM-100H 4.1 Maintenance List 4. Maintenance 4.1 Maintenance List (a) To operate the product correctly at all times and maintain its specified performance, it is necessary for you to thoroughly understand its function and perform maintenance periodically. 【IMPORTANT】 • Operating the product without performing maintenance periodically can result in a failure.
Page 59 Model: OBM-100H 4.2 Spare Parts 4.3 Operation Check Using Equivalent Input 4.2 Spare Parts • Main dissolved oxygen electrode (temperature compensation 10kΩ type) Model 7561L Model 7562L Model 7563L (custom-made product) Model 7564L (custom-made product) • Sodium sulfite (Sulfite of soda) ⋅⋅⋅⋅⋅⋅ When zero calibration is performed using zero solution 〔NOTE〕...
Page 60 Model: OBM-100H 4.3 Operation Check Using Equivalent Input ① Preparation • Standard voltage generator (the one that can generate 0 to 5V) • Digital multimeter (internal resistance 10Ω or less, current measuring range is used) • 10kΩ fixed resistor • 1MΩ fixed resistor Electric Shock Do not touch the terminal board at the rear while power is applied.
Page 61 Model: OBM-100H 4.3 Operation Check Using Equivalent Input Start zero calibration ⋅⋅⋅⋅⋅⋅ Press once in the “Calibration select (AUTO, etc.)” screen. “CAL” and “WAIT” blink and zero calibration starts. When zero calibration ends, “CAL” stays lit and “WAIT” turns off.
Page 62 Model: OBM-100H 4.3 Operation Check Using Equivalent Input Input/Output Standard Values for Each Measuring Range μ μ μ DO 0 to 20 g/L measuring range DO 0 to 50 g/L measuring range DO 0 to 100 g/L measuring range Equivalent...
Page 63 Model: OBM-100H 4.4 Checking the Insulation Resistance of Extension Cable 4.4 Checking the Insulation Resistance of Extension Cable (a) When a connector box (option) and a extension cable (option) are used, high insulation is needed for these parts. Therefore, measure the insulation resistance periodically.
Page 64 Model: OBM-100H 4.4 Checking the Insulation Resistance of Extension Cable 【IMPORTANT】 • Do not moisten the terminals of the electrode lead wires and extension cable or touch them by dirty hand. In case they get dirty, wipe off using a clean cloth with high grade alcohol and dry them thoroughly.
Page 65 Model: OBM-100H 5.1 Error message 5. Troubleshooting 5.1 Error message (1) Error messages for calibration and necessary actions (a) When measurement is continued, the characteristic of the DO electrode changes gradually by contaminants and chemical reactions. By performing calibration, correct measurement can be continued.
Page 66 Model: OBM-100H 5.1 Error message (a) Zero calibration cannot be made (E-01) If zero calibration is performed with its result out of the range of design standard by ±0.05μA, an error message “E-01” appears. at 25 Input current ( A) Zero calibration range 0.05 A...
Page 67 Model: OBM-100H 5.1 Error message (2) Other error messages and necessary actions Other Error Messages and Necessary Actions Item Indication Message name and contents Actions, etc. • When the temperature of the [Temperature measured value error] sample water returns within a •...
Page 68 Model: OBM-100H 5.1 Error message (Continued from previous page) Item Indication Message name and contents Actions, etc. Atmospheric pressure value overflowed Atmospheric pressure value underflowed • If the transmitter does not [Storage element error] return to normal when power is •...
Page 69 Model: OBM-100H 5.2 Troubleshooting Flowchart 5.2 Troubleshooting Flowchart After performing calibration, Error Inspect the electrode. 5.1(1) “Error messages for message E-01 to E-03 appears. calibration and necessary actions” Error message E-20 to E-21 appears If the transmitter does not return to normal when power is turned on again, contact DKK-TOA.
Page 70 Model: OBM-100H 5.3 Measures Against Noise 5.3 Measures Against Noise (a) Error symptom due to noise If a strong noise source exists near this DO measurement system, the following symptoms may occur. This transmitter has an effective anti-noise characteristic for ±1500Vp-p (peak-to-peak voltage) but if a peripheral device exists that generates strong noise exceeding this level, any of the following symptoms occurs.
Page 71 Model: OBM-100H 6.1 Specifications 6. Specifications and Description 6.1 Specifications (a) Basic items Product name : Dissolved Oxygen Analyzer/Transmitter Model : OBM-100H Measuring object : Dissolved oxygen value (DO) in water, Oxygen value (O ) in the air, Dissolved oxygen saturation ratio (SAT) in water,...
Page 72 Model: OBM-100H 6.1 Specifications Power voltage : 90 to 264VAC, 50/60Hz. Power consumption : Approx. 5VA Contact output signal : Alarm output signal, maintenance-in-progress signal and abnormal output signal. RS-232C : Optional specification (b) Performance : DO measurement ⋅⋅⋅⋅ Within ±0.6% FS (equivalent input) Linearity : Within ±0.5% FS (equivalent input)
Page 73 Model: OBM-100H 6.1 Specifications (d) Function Calibration method : Zero calibration····· Electrical method to turn off the electrode input in the transmitter or the method to immerse the electrode in sodium sulfite solution of 5 to 10% Span calibration ···· Method to calibrate the electrode using air...
Page 74 Model: OBM-100H 6.2 Factors that Influence the Measurement 6.2 Factors that Influence the Measurement The factors that influence the measurement are temperature, pressure, flow rate and the composition of sample water. (a) Temperature Since the electrode output has a temperature coefficient of about +3% per 1°C and the amount of saturated dissolved oxygen has a temperature coefficient of about −3% per 1°C, a deviation of 6%...
Page 75 Model: OBM-100H 7. RS-232C Connector (Option) 7. RS-232C Connector (Option) (1) RS-232C connector function (a) When the transmitter is provided with an optional RS-232C connector, the following can be made by connecting a communication cable between this connector and a personal computer (PC).
Page 76 Model: OBM-100H 7. RS-232C Connector (Option) Connector Connector (D-sub 9-pin, female) (D-sub 9-pin) Transmitter side (female) PC side Communication Cable Outline RD (RXD) RD (RXD) SD (TXD) SD (TXD) ER (DTR) ER (DTR) DR (DSR) DR (DSR) RS (RTS) RS (RTS)
Page 77 Model: OBM-100H 7. RS-232C Connector (Option) (a) Make sure to turn off the power source to the transmitter and turn off the power of PC before you connect a communication cable. When the cable is connected, turn on the power source and turn on the power of PC.
Page 78 Model: OBM-100H 8.1 Transmitter Mounting 8. Installation 8.1 Transmitter Mounting (1) Installation location Install the transmitter a location which conforms to the specifications and satisfies the following conditions. (a) A location where the lead wires of the sensor, etc. can reach.
Page 79 Model: OBM-100H 8.1 Transmitter Mounting 120 (100*) Set screw 90 5.5 +0.8 * When mounted using fixing screws at the top and bottom. < Dimensions > < Pannel cut > Unit: mm Dimensions and Panel Cutout Fixture Mounting the Transmitter to Panel Cutout...
Page 80 Model: OBM-100H 8.2 Wire Connection 8.2 Wire Connection (1) Connection diagram Electric Shock Do not touch the terminal board while power is applied. Touching terminals can cause electric shock. When extension cable is used Connector box Extension cable Ground wire for...
Page 81 Model: OBM-100H 8.2 Wire Connection (2) Electrode signal input terminals If the sensor and transmitter are connected with an extension cable, connect the electrode lead wires to the connector box. 8.3 “Extension Cable and Connector Box” 〔NOTE〕 • Description of terminal number...
Page 82 Model: OBM-100H 8.2 Wire Connection (5) Ground terminal (a) Ground the ground terminal (E) of the terminal board with D type grounding method (ground resistance 100Ω max.). To prevent noise, avoid sharing the ground with power equipment. (b) If the transmitter cannot be grounded near the installation location, the transmitter can be grounded at the power source side.
Page 83 Model: OBM-100H 8.2 Wire Connection (7) Maintenance-in-progress signal output terminals (a) A maintenance-in-progress signal can be taken from the following terminals (NO). Connect theses terminals to a solenoid valve, etc. Maintenance-in-progress output signal (terminals 34 and 35) (b) Install a contact protective spark killer and a pulse voltage absorbing spark killer near the solenoid valve.
Page 84 Model: OBM-100H 8.2 Wire Connection (c) If a temperature measured value error (E-04), memory element error (E-20) or setting data error (E-21) occurs, the abnormal output contact signal closes. The contact capacity is 250VAC, 3A or 30VDC, 3A (resistive load). If current larger than this value is to be opened / closed, install a power relay, etc.
Page 85 Model: OBM-100H 8.3 Extension Cable and Connector Box (Option) 8.3 Extension Cable and Connector Box (Option) If it is necessary to install the transmitter in a location more than the length of the electrode lead wires reach, use an extension cable and a connector box to extend the wires.
Page 86 Model: OBM-100H 8.3 Extension Cable and Connector Box (Option) (2) Mounting the connector box (a) Since the standard length of the electrode lead wires is 5m, install the connector box near the sensor. (b) Mount the connector box to a 25 to 50A pipe, wall or a plate using the mounting fixture provided as an accessory.
Page 87 Model: OBM-100H 8.3 Extension Cable and Connector Box (Option) 【IMPORTANT】 • If a hole of the diameter not appropriate for the electrode lead wires is used, airtight condition cannot be maintained. Lead wire (Terminal Taper packing for electrode Dustproof plate...
Page 88 Model: OBM-100H 8.3 Extension Cable and Connector Box (Option) (4) Wire connection for extension cable ① Put through the extension cable. ⋅⋅⋅⋅⋅⋅ Remove the watertight gland for extension cable and put the extension cable through the nut, washer and taper packing to connect to the inside of the connector box.
Page 89 Model: OBM-100H 8.3 Extension Cable and Connector Box (Option) (6) Wiring to the connector box using conduit pipe (a) It is recommended that conduit pipe be used to install the extension cable. In this case, use flexible conduit approx. 1m near the connector box.
Page 90 Head Office Address: 29-10, 1-Chome, Takadanobaba, Shinjuku-Ku, Tokyo, 169-8648 Japan Telephone: +81-3-3202-0225 Facsimile: +81-3-3202-5685 URL http://www.toadkk.co.jp/...